3 #include "exec/gdbstub.h"
5 #include "qemu/host-utils.h"
6 #include "sysemu/arch_init.h"
7 #include "sysemu/sysemu.h"
8 #include "qemu/bitops.h"
9 #include "qemu/crc32c.h"
10 #include <zlib.h> /* For crc32 */
12 #ifndef CONFIG_USER_ONLY
13 static inline int get_phys_addr(CPUARMState *env, target_ulong address,
14 int access_type, int is_user,
15 hwaddr *phys_ptr, int *prot,
16 target_ulong *page_size);
18 /* Definitions for the PMCCNTR and PMCR registers */
24 static int vfp_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
28 /* VFP data registers are always little-endian. */
29 nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
31 stfq_le_p(buf, env->vfp.regs[reg]);
34 if (arm_feature(env, ARM_FEATURE_NEON)) {
35 /* Aliases for Q regs. */
38 stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]);
39 stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]);
43 switch (reg - nregs) {
44 case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4;
45 case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4;
46 case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4;
51 static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
55 nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
57 env->vfp.regs[reg] = ldfq_le_p(buf);
60 if (arm_feature(env, ARM_FEATURE_NEON)) {
63 env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf);
64 env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8);
68 switch (reg - nregs) {
69 case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4;
70 case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4;
71 case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4;
76 static int aarch64_fpu_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
80 /* 128 bit FP register */
81 stfq_le_p(buf, env->vfp.regs[reg * 2]);
82 stfq_le_p(buf + 8, env->vfp.regs[reg * 2 + 1]);
86 stl_p(buf, vfp_get_fpsr(env));
90 stl_p(buf, vfp_get_fpcr(env));
97 static int aarch64_fpu_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
101 /* 128 bit FP register */
102 env->vfp.regs[reg * 2] = ldfq_le_p(buf);
103 env->vfp.regs[reg * 2 + 1] = ldfq_le_p(buf + 8);
107 vfp_set_fpsr(env, ldl_p(buf));
111 vfp_set_fpcr(env, ldl_p(buf));
118 static uint64_t raw_read(CPUARMState *env, const ARMCPRegInfo *ri)
120 if (cpreg_field_is_64bit(ri)) {
121 return CPREG_FIELD64(env, ri);
123 return CPREG_FIELD32(env, ri);
127 static void raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
130 if (cpreg_field_is_64bit(ri)) {
131 CPREG_FIELD64(env, ri) = value;
133 CPREG_FIELD32(env, ri) = value;
137 static uint64_t read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri)
139 /* Raw read of a coprocessor register (as needed for migration, etc). */
140 if (ri->type & ARM_CP_CONST) {
141 return ri->resetvalue;
142 } else if (ri->raw_readfn) {
143 return ri->raw_readfn(env, ri);
144 } else if (ri->readfn) {
145 return ri->readfn(env, ri);
147 return raw_read(env, ri);
151 static void write_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri,
154 /* Raw write of a coprocessor register (as needed for migration, etc).
155 * Note that constant registers are treated as write-ignored; the
156 * caller should check for success by whether a readback gives the
159 if (ri->type & ARM_CP_CONST) {
161 } else if (ri->raw_writefn) {
162 ri->raw_writefn(env, ri, v);
163 } else if (ri->writefn) {
164 ri->writefn(env, ri, v);
166 raw_write(env, ri, v);
170 bool write_cpustate_to_list(ARMCPU *cpu)
172 /* Write the coprocessor state from cpu->env to the (index,value) list. */
176 for (i = 0; i < cpu->cpreg_array_len; i++) {
177 uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
178 const ARMCPRegInfo *ri;
180 ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
185 if (ri->type & ARM_CP_NO_MIGRATE) {
188 cpu->cpreg_values[i] = read_raw_cp_reg(&cpu->env, ri);
193 bool write_list_to_cpustate(ARMCPU *cpu)
198 for (i = 0; i < cpu->cpreg_array_len; i++) {
199 uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
200 uint64_t v = cpu->cpreg_values[i];
201 const ARMCPRegInfo *ri;
203 ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
208 if (ri->type & ARM_CP_NO_MIGRATE) {
211 /* Write value and confirm it reads back as written
212 * (to catch read-only registers and partially read-only
213 * registers where the incoming migration value doesn't match)
215 write_raw_cp_reg(&cpu->env, ri, v);
216 if (read_raw_cp_reg(&cpu->env, ri) != v) {
223 static void add_cpreg_to_list(gpointer key, gpointer opaque)
225 ARMCPU *cpu = opaque;
227 const ARMCPRegInfo *ri;
229 regidx = *(uint32_t *)key;
230 ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
232 if (!(ri->type & ARM_CP_NO_MIGRATE)) {
233 cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx);
234 /* The value array need not be initialized at this point */
235 cpu->cpreg_array_len++;
239 static void count_cpreg(gpointer key, gpointer opaque)
241 ARMCPU *cpu = opaque;
243 const ARMCPRegInfo *ri;
245 regidx = *(uint32_t *)key;
246 ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
248 if (!(ri->type & ARM_CP_NO_MIGRATE)) {
249 cpu->cpreg_array_len++;
253 static gint cpreg_key_compare(gconstpointer a, gconstpointer b)
255 uint64_t aidx = cpreg_to_kvm_id(*(uint32_t *)a);
256 uint64_t bidx = cpreg_to_kvm_id(*(uint32_t *)b);
267 static void cpreg_make_keylist(gpointer key, gpointer value, gpointer udata)
269 GList **plist = udata;
271 *plist = g_list_prepend(*plist, key);
274 void init_cpreg_list(ARMCPU *cpu)
276 /* Initialise the cpreg_tuples[] array based on the cp_regs hash.
277 * Note that we require cpreg_tuples[] to be sorted by key ID.
282 g_hash_table_foreach(cpu->cp_regs, cpreg_make_keylist, &keys);
284 keys = g_list_sort(keys, cpreg_key_compare);
286 cpu->cpreg_array_len = 0;
288 g_list_foreach(keys, count_cpreg, cpu);
290 arraylen = cpu->cpreg_array_len;
291 cpu->cpreg_indexes = g_new(uint64_t, arraylen);
292 cpu->cpreg_values = g_new(uint64_t, arraylen);
293 cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen);
294 cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen);
295 cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
296 cpu->cpreg_array_len = 0;
298 g_list_foreach(keys, add_cpreg_to_list, cpu);
300 assert(cpu->cpreg_array_len == arraylen);
305 static void dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
307 ARMCPU *cpu = arm_env_get_cpu(env);
309 env->cp15.c3 = value;
310 tlb_flush(CPU(cpu), 1); /* Flush TLB as domain not tracked in TLB */
313 static void fcse_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
315 ARMCPU *cpu = arm_env_get_cpu(env);
317 if (env->cp15.c13_fcse != value) {
318 /* Unlike real hardware the qemu TLB uses virtual addresses,
319 * not modified virtual addresses, so this causes a TLB flush.
321 tlb_flush(CPU(cpu), 1);
322 env->cp15.c13_fcse = value;
326 static void contextidr_write(CPUARMState *env, const ARMCPRegInfo *ri,
329 ARMCPU *cpu = arm_env_get_cpu(env);
331 if (env->cp15.c13_context != value && !arm_feature(env, ARM_FEATURE_MPU)) {
332 /* For VMSA (when not using the LPAE long descriptor page table
333 * format) this register includes the ASID, so do a TLB flush.
334 * For PMSA it is purely a process ID and no action is needed.
336 tlb_flush(CPU(cpu), 1);
338 env->cp15.c13_context = value;
341 static void tlbiall_write(CPUARMState *env, const ARMCPRegInfo *ri,
344 /* Invalidate all (TLBIALL) */
345 ARMCPU *cpu = arm_env_get_cpu(env);
347 tlb_flush(CPU(cpu), 1);
350 static void tlbimva_write(CPUARMState *env, const ARMCPRegInfo *ri,
353 /* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
354 ARMCPU *cpu = arm_env_get_cpu(env);
356 tlb_flush_page(CPU(cpu), value & TARGET_PAGE_MASK);
359 static void tlbiasid_write(CPUARMState *env, const ARMCPRegInfo *ri,
362 /* Invalidate by ASID (TLBIASID) */
363 ARMCPU *cpu = arm_env_get_cpu(env);
365 tlb_flush(CPU(cpu), value == 0);
368 static void tlbimvaa_write(CPUARMState *env, const ARMCPRegInfo *ri,
371 /* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
372 ARMCPU *cpu = arm_env_get_cpu(env);
374 tlb_flush_page(CPU(cpu), value & TARGET_PAGE_MASK);
377 static const ARMCPRegInfo cp_reginfo[] = {
378 /* DBGDIDR: just RAZ. In particular this means the "debug architecture
379 * version" bits will read as a reserved value, which should cause
380 * Linux to not try to use the debug hardware.
382 { .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
383 .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
384 /* MMU Domain access control / MPU write buffer control */
385 { .name = "DACR", .cp = 15,
386 .crn = 3, .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
387 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c3),
388 .resetvalue = 0, .writefn = dacr_write, .raw_writefn = raw_write, },
389 { .name = "FCSEIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 0,
390 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_fcse),
391 .resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
392 { .name = "CONTEXTIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 1,
393 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_context),
394 .resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
395 /* ??? This covers not just the impdef TLB lockdown registers but also
396 * some v7VMSA registers relating to TEX remap, so it is overly broad.
398 { .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = CP_ANY,
399 .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
400 /* MMU TLB control. Note that the wildcarding means we cover not just
401 * the unified TLB ops but also the dside/iside/inner-shareable variants.
403 { .name = "TLBIALL", .cp = 15, .crn = 8, .crm = CP_ANY,
404 .opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write,
405 .type = ARM_CP_NO_MIGRATE },
406 { .name = "TLBIMVA", .cp = 15, .crn = 8, .crm = CP_ANY,
407 .opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write,
408 .type = ARM_CP_NO_MIGRATE },
409 { .name = "TLBIASID", .cp = 15, .crn = 8, .crm = CP_ANY,
410 .opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write,
411 .type = ARM_CP_NO_MIGRATE },
412 { .name = "TLBIMVAA", .cp = 15, .crn = 8, .crm = CP_ANY,
413 .opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write,
414 .type = ARM_CP_NO_MIGRATE },
415 /* Cache maintenance ops; some of this space may be overridden later. */
416 { .name = "CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
417 .opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
418 .type = ARM_CP_NOP | ARM_CP_OVERRIDE },
422 static const ARMCPRegInfo not_v6_cp_reginfo[] = {
423 /* Not all pre-v6 cores implemented this WFI, so this is slightly
426 { .name = "WFI_v5", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = 2,
427 .access = PL1_W, .type = ARM_CP_WFI },
431 static const ARMCPRegInfo not_v7_cp_reginfo[] = {
432 /* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
433 * is UNPREDICTABLE; we choose to NOP as most implementations do).
435 { .name = "WFI_v6", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
436 .access = PL1_W, .type = ARM_CP_WFI },
437 /* L1 cache lockdown. Not architectural in v6 and earlier but in practice
438 * implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
439 * OMAPCP will override this space.
441 { .name = "DLOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 0,
442 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_data),
444 { .name = "ILOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 1,
445 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_insn),
447 /* v6 doesn't have the cache ID registers but Linux reads them anyway */
448 { .name = "DUMMY", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = CP_ANY,
449 .access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
454 static void cpacr_write(CPUARMState *env, const ARMCPRegInfo *ri,
457 if (env->cp15.c1_coproc != value) {
458 env->cp15.c1_coproc = value;
459 /* ??? Is this safe when called from within a TB? */
464 static const ARMCPRegInfo v6_cp_reginfo[] = {
465 /* prefetch by MVA in v6, NOP in v7 */
466 { .name = "MVA_prefetch",
467 .cp = 15, .crn = 7, .crm = 13, .opc1 = 0, .opc2 = 1,
468 .access = PL1_W, .type = ARM_CP_NOP },
469 { .name = "ISB", .cp = 15, .crn = 7, .crm = 5, .opc1 = 0, .opc2 = 4,
470 .access = PL0_W, .type = ARM_CP_NOP },
471 { .name = "DSB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 4,
472 .access = PL0_W, .type = ARM_CP_NOP },
473 { .name = "DMB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 5,
474 .access = PL0_W, .type = ARM_CP_NOP },
475 { .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 2,
476 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c6_insn),
478 /* Watchpoint Fault Address Register : should actually only be present
479 * for 1136, 1176, 11MPCore.
481 { .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
482 .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, },
483 { .name = "CPACR", .state = ARM_CP_STATE_BOTH, .opc0 = 3,
484 .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2,
485 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_coproc),
486 .resetvalue = 0, .writefn = cpacr_write },
490 static CPAccessResult pmreg_access(CPUARMState *env, const ARMCPRegInfo *ri)
492 /* Performance monitor registers user accessibility is controlled
495 if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) {
496 return CP_ACCESS_TRAP;
501 #ifndef CONFIG_USER_ONLY
502 static void pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
505 /* Don't computer the number of ticks in user mode */
508 temp_ticks = qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) *
509 get_ticks_per_sec() / 1000000;
511 if (env->cp15.c9_pmcr & PMCRE) {
512 /* If the counter is enabled */
513 if (env->cp15.c9_pmcr & PMCRD) {
514 /* Increment once every 64 processor clock cycles */
515 env->cp15.c15_ccnt = (temp_ticks/64) - env->cp15.c15_ccnt;
517 env->cp15.c15_ccnt = temp_ticks - env->cp15.c15_ccnt;
522 /* The counter has been reset */
523 env->cp15.c15_ccnt = 0;
526 /* only the DP, X, D and E bits are writable */
527 env->cp15.c9_pmcr &= ~0x39;
528 env->cp15.c9_pmcr |= (value & 0x39);
530 if (env->cp15.c9_pmcr & PMCRE) {
531 if (env->cp15.c9_pmcr & PMCRD) {
532 /* Increment once every 64 processor clock cycles */
535 env->cp15.c15_ccnt = temp_ticks - env->cp15.c15_ccnt;
539 static uint64_t pmccntr_read(CPUARMState *env, const ARMCPRegInfo *ri)
541 uint32_t total_ticks;
543 if (!(env->cp15.c9_pmcr & PMCRE)) {
544 /* Counter is disabled, do not change value */
545 return env->cp15.c15_ccnt;
548 total_ticks = qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) *
549 get_ticks_per_sec() / 1000000;
551 if (env->cp15.c9_pmcr & PMCRD) {
552 /* Increment once every 64 processor clock cycles */
555 return total_ticks - env->cp15.c15_ccnt;
558 static void pmccntr_write(CPUARMState *env, const ARMCPRegInfo *ri,
561 uint32_t total_ticks;
563 if (!(env->cp15.c9_pmcr & PMCRE)) {
564 /* Counter is disabled, set the absolute value */
565 env->cp15.c15_ccnt = value;
569 total_ticks = qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) *
570 get_ticks_per_sec() / 1000000;
572 if (env->cp15.c9_pmcr & PMCRD) {
573 /* Increment once every 64 processor clock cycles */
576 env->cp15.c15_ccnt = total_ticks - value;
580 static void pmcntenset_write(CPUARMState *env, const ARMCPRegInfo *ri,
584 env->cp15.c9_pmcnten |= value;
587 static void pmcntenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
591 env->cp15.c9_pmcnten &= ~value;
594 static void pmovsr_write(CPUARMState *env, const ARMCPRegInfo *ri,
597 env->cp15.c9_pmovsr &= ~value;
600 static void pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri,
603 env->cp15.c9_pmxevtyper = value & 0xff;
606 static void pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri,
609 env->cp15.c9_pmuserenr = value & 1;
612 static void pmintenset_write(CPUARMState *env, const ARMCPRegInfo *ri,
615 /* We have no event counters so only the C bit can be changed */
617 env->cp15.c9_pminten |= value;
620 static void pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
624 env->cp15.c9_pminten &= ~value;
627 static void vbar_write(CPUARMState *env, const ARMCPRegInfo *ri,
630 /* Note that even though the AArch64 view of this register has bits
631 * [10:0] all RES0 we can only mask the bottom 5, to comply with the
632 * architectural requirements for bits which are RES0 only in some
633 * contexts. (ARMv8 would permit us to do no masking at all, but ARMv7
634 * requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.)
636 env->cp15.c12_vbar = value & ~0x1Ful;
639 static uint64_t ccsidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
641 ARMCPU *cpu = arm_env_get_cpu(env);
642 return cpu->ccsidr[env->cp15.c0_cssel];
645 static void csselr_write(CPUARMState *env, const ARMCPRegInfo *ri,
648 env->cp15.c0_cssel = value & 0xf;
651 static const ARMCPRegInfo v7_cp_reginfo[] = {
652 /* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
655 { .name = "DBGDRAR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
656 .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
657 { .name = "DBGDSAR", .cp = 14, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
658 .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
659 /* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */
660 { .name = "NOP", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
661 .access = PL1_W, .type = ARM_CP_NOP },
662 /* Performance monitors are implementation defined in v7,
663 * but with an ARM recommended set of registers, which we
664 * follow (although we don't actually implement any counters)
666 * Performance registers fall into three categories:
667 * (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR)
668 * (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR)
669 * (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others)
670 * For the cases controlled by PMUSERENR we must set .access to PL0_RW
671 * or PL0_RO as appropriate and then check PMUSERENR in the helper fn.
673 { .name = "PMCNTENSET", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 1,
674 .access = PL0_RW, .resetvalue = 0,
675 .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
676 .writefn = pmcntenset_write,
677 .accessfn = pmreg_access,
678 .raw_writefn = raw_write },
679 { .name = "PMCNTENCLR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 2,
680 .access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
681 .accessfn = pmreg_access,
682 .writefn = pmcntenclr_write,
683 .type = ARM_CP_NO_MIGRATE },
684 { .name = "PMOVSR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 3,
685 .access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmovsr),
686 .accessfn = pmreg_access,
687 .writefn = pmovsr_write,
688 .raw_writefn = raw_write },
689 /* Unimplemented so WI. */
690 { .name = "PMSWINC", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 4,
691 .access = PL0_W, .accessfn = pmreg_access, .type = ARM_CP_NOP },
692 /* Since we don't implement any events, writing to PMSELR is UNPREDICTABLE.
693 * We choose to RAZ/WI.
695 { .name = "PMSELR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 5,
696 .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0,
697 .accessfn = pmreg_access },
698 #ifndef CONFIG_USER_ONLY
699 { .name = "PMCCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 0,
700 .access = PL0_RW, .resetvalue = 0, .type = ARM_CP_IO,
701 .readfn = pmccntr_read, .writefn = pmccntr_write,
702 .accessfn = pmreg_access },
704 { .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1,
706 .fieldoffset = offsetof(CPUARMState, cp15.c9_pmxevtyper),
707 .accessfn = pmreg_access, .writefn = pmxevtyper_write,
708 .raw_writefn = raw_write },
709 /* Unimplemented, RAZ/WI. */
710 { .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2,
711 .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0,
712 .accessfn = pmreg_access },
713 { .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0,
714 .access = PL0_R | PL1_RW,
715 .fieldoffset = offsetof(CPUARMState, cp15.c9_pmuserenr),
717 .writefn = pmuserenr_write, .raw_writefn = raw_write },
718 { .name = "PMINTENSET", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 1,
720 .fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
722 .writefn = pmintenset_write, .raw_writefn = raw_write },
723 { .name = "PMINTENCLR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 2,
724 .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
725 .fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
726 .resetvalue = 0, .writefn = pmintenclr_write, },
727 { .name = "VBAR", .state = ARM_CP_STATE_BOTH,
728 .opc0 = 3, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0,
729 .access = PL1_RW, .writefn = vbar_write,
730 .fieldoffset = offsetof(CPUARMState, cp15.c12_vbar),
732 { .name = "SCR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 0,
733 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_scr),
735 { .name = "CCSIDR", .state = ARM_CP_STATE_BOTH,
736 .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
737 .access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_MIGRATE },
738 { .name = "CSSELR", .state = ARM_CP_STATE_BOTH,
739 .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0,
740 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c0_cssel),
741 .writefn = csselr_write, .resetvalue = 0 },
742 /* Auxiliary ID register: this actually has an IMPDEF value but for now
743 * just RAZ for all cores:
745 { .name = "AIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 7,
746 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
747 /* MAIR can just read-as-written because we don't implement caches
748 * and so don't need to care about memory attributes.
750 { .name = "MAIR_EL1", .state = ARM_CP_STATE_AA64,
751 .opc0 = 3, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 0,
752 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.mair_el1),
754 /* For non-long-descriptor page tables these are PRRR and NMRR;
755 * regardless they still act as reads-as-written for QEMU.
756 * The override is necessary because of the overly-broad TLB_LOCKDOWN
759 { .name = "MAIR0", .state = ARM_CP_STATE_AA32, .type = ARM_CP_OVERRIDE,
760 .cp = 15, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 0, .access = PL1_RW,
761 .fieldoffset = offsetoflow32(CPUARMState, cp15.mair_el1),
762 .resetfn = arm_cp_reset_ignore },
763 { .name = "MAIR1", .state = ARM_CP_STATE_AA32, .type = ARM_CP_OVERRIDE,
764 .cp = 15, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 1, .access = PL1_RW,
765 .fieldoffset = offsetofhigh32(CPUARMState, cp15.mair_el1),
766 .resetfn = arm_cp_reset_ignore },
770 static void teecr_write(CPUARMState *env, const ARMCPRegInfo *ri,
777 static CPAccessResult teehbr_access(CPUARMState *env, const ARMCPRegInfo *ri)
779 if (arm_current_pl(env) == 0 && (env->teecr & 1)) {
780 return CP_ACCESS_TRAP;
785 static const ARMCPRegInfo t2ee_cp_reginfo[] = {
786 { .name = "TEECR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 6, .opc2 = 0,
787 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, teecr),
789 .writefn = teecr_write },
790 { .name = "TEEHBR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 6, .opc2 = 0,
791 .access = PL0_RW, .fieldoffset = offsetof(CPUARMState, teehbr),
792 .accessfn = teehbr_access, .resetvalue = 0 },
796 static const ARMCPRegInfo v6k_cp_reginfo[] = {
797 { .name = "TPIDR_EL0", .state = ARM_CP_STATE_AA64,
798 .opc0 = 3, .opc1 = 3, .opc2 = 2, .crn = 13, .crm = 0,
800 .fieldoffset = offsetof(CPUARMState, cp15.tpidr_el0), .resetvalue = 0 },
801 { .name = "TPIDRURW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 2,
803 .fieldoffset = offsetoflow32(CPUARMState, cp15.tpidr_el0),
804 .resetfn = arm_cp_reset_ignore },
805 { .name = "TPIDRRO_EL0", .state = ARM_CP_STATE_AA64,
806 .opc0 = 3, .opc1 = 3, .opc2 = 3, .crn = 13, .crm = 0,
807 .access = PL0_R|PL1_W,
808 .fieldoffset = offsetof(CPUARMState, cp15.tpidrro_el0), .resetvalue = 0 },
809 { .name = "TPIDRURO", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 3,
810 .access = PL0_R|PL1_W,
811 .fieldoffset = offsetoflow32(CPUARMState, cp15.tpidrro_el0),
812 .resetfn = arm_cp_reset_ignore },
813 { .name = "TPIDR_EL1", .state = ARM_CP_STATE_BOTH,
814 .opc0 = 3, .opc1 = 0, .opc2 = 4, .crn = 13, .crm = 0,
816 .fieldoffset = offsetof(CPUARMState, cp15.tpidr_el1), .resetvalue = 0 },
820 #ifndef CONFIG_USER_ONLY
822 static CPAccessResult gt_cntfrq_access(CPUARMState *env, const ARMCPRegInfo *ri)
824 /* CNTFRQ: not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero */
825 if (arm_current_pl(env) == 0 && !extract32(env->cp15.c14_cntkctl, 0, 2)) {
826 return CP_ACCESS_TRAP;
831 static CPAccessResult gt_counter_access(CPUARMState *env, int timeridx)
833 /* CNT[PV]CT: not visible from PL0 if ELO[PV]CTEN is zero */
834 if (arm_current_pl(env) == 0 &&
835 !extract32(env->cp15.c14_cntkctl, timeridx, 1)) {
836 return CP_ACCESS_TRAP;
841 static CPAccessResult gt_timer_access(CPUARMState *env, int timeridx)
843 /* CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from PL0 if
844 * EL0[PV]TEN is zero.
846 if (arm_current_pl(env) == 0 &&
847 !extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
848 return CP_ACCESS_TRAP;
853 static CPAccessResult gt_pct_access(CPUARMState *env,
854 const ARMCPRegInfo *ri)
856 return gt_counter_access(env, GTIMER_PHYS);
859 static CPAccessResult gt_vct_access(CPUARMState *env,
860 const ARMCPRegInfo *ri)
862 return gt_counter_access(env, GTIMER_VIRT);
865 static CPAccessResult gt_ptimer_access(CPUARMState *env, const ARMCPRegInfo *ri)
867 return gt_timer_access(env, GTIMER_PHYS);
870 static CPAccessResult gt_vtimer_access(CPUARMState *env, const ARMCPRegInfo *ri)
872 return gt_timer_access(env, GTIMER_VIRT);
875 static uint64_t gt_get_countervalue(CPUARMState *env)
877 return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / GTIMER_SCALE;
880 static void gt_recalc_timer(ARMCPU *cpu, int timeridx)
882 ARMGenericTimer *gt = &cpu->env.cp15.c14_timer[timeridx];
885 /* Timer enabled: calculate and set current ISTATUS, irq, and
886 * reset timer to when ISTATUS next has to change
888 uint64_t count = gt_get_countervalue(&cpu->env);
889 /* Note that this must be unsigned 64 bit arithmetic: */
890 int istatus = count >= gt->cval;
893 gt->ctl = deposit32(gt->ctl, 2, 1, istatus);
894 qemu_set_irq(cpu->gt_timer_outputs[timeridx],
895 (istatus && !(gt->ctl & 2)));
897 /* Next transition is when count rolls back over to zero */
898 nexttick = UINT64_MAX;
900 /* Next transition is when we hit cval */
903 /* Note that the desired next expiry time might be beyond the
904 * signed-64-bit range of a QEMUTimer -- in this case we just
905 * set the timer for as far in the future as possible. When the
906 * timer expires we will reset the timer for any remaining period.
908 if (nexttick > INT64_MAX / GTIMER_SCALE) {
909 nexttick = INT64_MAX / GTIMER_SCALE;
911 timer_mod(cpu->gt_timer[timeridx], nexttick);
913 /* Timer disabled: ISTATUS and timer output always clear */
915 qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0);
916 timer_del(cpu->gt_timer[timeridx]);
920 static void gt_cnt_reset(CPUARMState *env, const ARMCPRegInfo *ri)
922 ARMCPU *cpu = arm_env_get_cpu(env);
923 int timeridx = ri->opc1 & 1;
925 timer_del(cpu->gt_timer[timeridx]);
928 static uint64_t gt_cnt_read(CPUARMState *env, const ARMCPRegInfo *ri)
930 return gt_get_countervalue(env);
933 static void gt_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
936 int timeridx = ri->opc1 & 1;
938 env->cp15.c14_timer[timeridx].cval = value;
939 gt_recalc_timer(arm_env_get_cpu(env), timeridx);
942 static uint64_t gt_tval_read(CPUARMState *env, const ARMCPRegInfo *ri)
944 int timeridx = ri->crm & 1;
946 return (uint32_t)(env->cp15.c14_timer[timeridx].cval -
947 gt_get_countervalue(env));
950 static void gt_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
953 int timeridx = ri->crm & 1;
955 env->cp15.c14_timer[timeridx].cval = gt_get_countervalue(env) +
956 + sextract64(value, 0, 32);
957 gt_recalc_timer(arm_env_get_cpu(env), timeridx);
960 static void gt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
963 ARMCPU *cpu = arm_env_get_cpu(env);
964 int timeridx = ri->crm & 1;
965 uint32_t oldval = env->cp15.c14_timer[timeridx].ctl;
967 env->cp15.c14_timer[timeridx].ctl = value & 3;
968 if ((oldval ^ value) & 1) {
970 gt_recalc_timer(cpu, timeridx);
971 } else if ((oldval & value) & 2) {
972 /* IMASK toggled: don't need to recalculate,
973 * just set the interrupt line based on ISTATUS
975 qemu_set_irq(cpu->gt_timer_outputs[timeridx],
976 (oldval & 4) && (value & 2));
980 void arm_gt_ptimer_cb(void *opaque)
982 ARMCPU *cpu = opaque;
984 gt_recalc_timer(cpu, GTIMER_PHYS);
987 void arm_gt_vtimer_cb(void *opaque)
989 ARMCPU *cpu = opaque;
991 gt_recalc_timer(cpu, GTIMER_VIRT);
994 static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
995 /* Note that CNTFRQ is purely reads-as-written for the benefit
996 * of software; writing it doesn't actually change the timer frequency.
997 * Our reset value matches the fixed frequency we implement the timer at.
999 { .name = "CNTFRQ", .cp = 15, .crn = 14, .crm = 0, .opc1 = 0, .opc2 = 0,
1000 .type = ARM_CP_NO_MIGRATE,
1001 .access = PL1_RW | PL0_R, .accessfn = gt_cntfrq_access,
1002 .fieldoffset = offsetoflow32(CPUARMState, cp15.c14_cntfrq),
1003 .resetfn = arm_cp_reset_ignore,
1005 { .name = "CNTFRQ_EL0", .state = ARM_CP_STATE_AA64,
1006 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 0,
1007 .access = PL1_RW | PL0_R, .accessfn = gt_cntfrq_access,
1008 .fieldoffset = offsetof(CPUARMState, cp15.c14_cntfrq),
1009 .resetvalue = (1000 * 1000 * 1000) / GTIMER_SCALE,
1011 /* overall control: mostly access permissions */
1012 { .name = "CNTKCTL", .state = ARM_CP_STATE_BOTH,
1013 .opc0 = 3, .opc1 = 0, .crn = 14, .crm = 1, .opc2 = 0,
1015 .fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl),
1018 /* per-timer control */
1019 { .name = "CNTP_CTL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 1,
1020 .type = ARM_CP_IO | ARM_CP_NO_MIGRATE, .access = PL1_RW | PL0_R,
1021 .accessfn = gt_ptimer_access,
1022 .fieldoffset = offsetoflow32(CPUARMState,
1023 cp15.c14_timer[GTIMER_PHYS].ctl),
1024 .resetfn = arm_cp_reset_ignore,
1025 .writefn = gt_ctl_write, .raw_writefn = raw_write,
1027 { .name = "CNTP_CTL_EL0", .state = ARM_CP_STATE_AA64,
1028 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 1,
1029 .type = ARM_CP_IO, .access = PL1_RW | PL0_R,
1030 .accessfn = gt_ptimer_access,
1031 .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].ctl),
1033 .writefn = gt_ctl_write, .raw_writefn = raw_write,
1035 { .name = "CNTV_CTL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 1,
1036 .type = ARM_CP_IO | ARM_CP_NO_MIGRATE, .access = PL1_RW | PL0_R,
1037 .accessfn = gt_vtimer_access,
1038 .fieldoffset = offsetoflow32(CPUARMState,
1039 cp15.c14_timer[GTIMER_VIRT].ctl),
1040 .resetfn = arm_cp_reset_ignore,
1041 .writefn = gt_ctl_write, .raw_writefn = raw_write,
1043 { .name = "CNTV_CTL_EL0", .state = ARM_CP_STATE_AA64,
1044 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 1,
1045 .type = ARM_CP_IO, .access = PL1_RW | PL0_R,
1046 .accessfn = gt_vtimer_access,
1047 .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].ctl),
1049 .writefn = gt_ctl_write, .raw_writefn = raw_write,
1051 /* TimerValue views: a 32 bit downcounting view of the underlying state */
1052 { .name = "CNTP_TVAL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 0,
1053 .type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
1054 .accessfn = gt_ptimer_access,
1055 .readfn = gt_tval_read, .writefn = gt_tval_write,
1057 { .name = "CNTP_TVAL_EL0", .state = ARM_CP_STATE_AA64,
1058 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 0,
1059 .type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
1060 .readfn = gt_tval_read, .writefn = gt_tval_write,
1062 { .name = "CNTV_TVAL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 0,
1063 .type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
1064 .accessfn = gt_vtimer_access,
1065 .readfn = gt_tval_read, .writefn = gt_tval_write,
1067 { .name = "CNTV_TVAL_EL0", .state = ARM_CP_STATE_AA64,
1068 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 0,
1069 .type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
1070 .readfn = gt_tval_read, .writefn = gt_tval_write,
1072 /* The counter itself */
1073 { .name = "CNTPCT", .cp = 15, .crm = 14, .opc1 = 0,
1074 .access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO,
1075 .accessfn = gt_pct_access,
1076 .readfn = gt_cnt_read, .resetfn = arm_cp_reset_ignore,
1078 { .name = "CNTPCT_EL0", .state = ARM_CP_STATE_AA64,
1079 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 1,
1080 .access = PL0_R, .type = ARM_CP_NO_MIGRATE | ARM_CP_IO,
1081 .accessfn = gt_pct_access,
1082 .readfn = gt_cnt_read, .resetfn = gt_cnt_reset,
1084 { .name = "CNTVCT", .cp = 15, .crm = 14, .opc1 = 1,
1085 .access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO,
1086 .accessfn = gt_vct_access,
1087 .readfn = gt_cnt_read, .resetfn = arm_cp_reset_ignore,
1089 { .name = "CNTVCT_EL0", .state = ARM_CP_STATE_AA64,
1090 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 2,
1091 .access = PL0_R, .type = ARM_CP_NO_MIGRATE | ARM_CP_IO,
1092 .accessfn = gt_vct_access,
1093 .readfn = gt_cnt_read, .resetfn = gt_cnt_reset,
1095 /* Comparison value, indicating when the timer goes off */
1096 { .name = "CNTP_CVAL", .cp = 15, .crm = 14, .opc1 = 2,
1097 .access = PL1_RW | PL0_R,
1098 .type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_NO_MIGRATE,
1099 .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval),
1100 .accessfn = gt_ptimer_access, .resetfn = arm_cp_reset_ignore,
1101 .writefn = gt_cval_write, .raw_writefn = raw_write,
1103 { .name = "CNTP_CVAL_EL0", .state = ARM_CP_STATE_AA64,
1104 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 2,
1105 .access = PL1_RW | PL0_R,
1107 .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval),
1108 .resetvalue = 0, .accessfn = gt_vtimer_access,
1109 .writefn = gt_cval_write, .raw_writefn = raw_write,
1111 { .name = "CNTV_CVAL", .cp = 15, .crm = 14, .opc1 = 3,
1112 .access = PL1_RW | PL0_R,
1113 .type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_NO_MIGRATE,
1114 .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval),
1115 .accessfn = gt_vtimer_access, .resetfn = arm_cp_reset_ignore,
1116 .writefn = gt_cval_write, .raw_writefn = raw_write,
1118 { .name = "CNTV_CVAL_EL0", .state = ARM_CP_STATE_AA64,
1119 .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 2,
1120 .access = PL1_RW | PL0_R,
1122 .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval),
1123 .resetvalue = 0, .accessfn = gt_vtimer_access,
1124 .writefn = gt_cval_write, .raw_writefn = raw_write,
1130 /* In user-mode none of the generic timer registers are accessible,
1131 * and their implementation depends on QEMU_CLOCK_VIRTUAL and qdev gpio outputs,
1132 * so instead just don't register any of them.
1134 static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
1140 static void par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
1142 if (arm_feature(env, ARM_FEATURE_LPAE)) {
1143 env->cp15.c7_par = value;
1144 } else if (arm_feature(env, ARM_FEATURE_V7)) {
1145 env->cp15.c7_par = value & 0xfffff6ff;
1147 env->cp15.c7_par = value & 0xfffff1ff;
1151 #ifndef CONFIG_USER_ONLY
1152 /* get_phys_addr() isn't present for user-mode-only targets */
1154 /* Return true if extended addresses are enabled.
1155 * This is always the case if our translation regime is 64 bit,
1156 * but depends on TTBCR.EAE for 32 bit.
1158 static inline bool extended_addresses_enabled(CPUARMState *env)
1160 return arm_el_is_aa64(env, 1)
1161 || ((arm_feature(env, ARM_FEATURE_LPAE)
1162 && (env->cp15.c2_control & (1U << 31))));
1165 static CPAccessResult ats_access(CPUARMState *env, const ARMCPRegInfo *ri)
1168 /* Other states are only available with TrustZone; in
1169 * a non-TZ implementation these registers don't exist
1170 * at all, which is an Uncategorized trap. This underdecoding
1171 * is safe because the reginfo is NO_MIGRATE.
1173 return CP_ACCESS_TRAP_UNCATEGORIZED;
1175 return CP_ACCESS_OK;
1178 static void ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
1181 target_ulong page_size;
1183 int ret, is_user = ri->opc2 & 2;
1184 int access_type = ri->opc2 & 1;
1186 ret = get_phys_addr(env, value, access_type, is_user,
1187 &phys_addr, &prot, &page_size);
1188 if (extended_addresses_enabled(env)) {
1189 /* ret is a DFSR/IFSR value for the long descriptor
1190 * translation table format, but with WnR always clear.
1191 * Convert it to a 64-bit PAR.
1193 uint64_t par64 = (1 << 11); /* LPAE bit always set */
1195 par64 |= phys_addr & ~0xfffULL;
1196 /* We don't set the ATTR or SH fields in the PAR. */
1199 par64 |= (ret & 0x3f) << 1; /* FS */
1200 /* Note that S2WLK and FSTAGE are always zero, because we don't
1201 * implement virtualization and therefore there can't be a stage 2
1205 env->cp15.c7_par = par64;
1206 env->cp15.c7_par_hi = par64 >> 32;
1208 /* ret is a DFSR/IFSR value for the short descriptor
1209 * translation table format (with WnR always clear).
1210 * Convert it to a 32-bit PAR.
1213 /* We do not set any attribute bits in the PAR */
1214 if (page_size == (1 << 24)
1215 && arm_feature(env, ARM_FEATURE_V7)) {
1216 env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1;
1218 env->cp15.c7_par = phys_addr & 0xfffff000;
1221 env->cp15.c7_par = ((ret & (1 << 10)) >> 5) |
1222 ((ret & (1 << 12)) >> 6) |
1223 ((ret & 0xf) << 1) | 1;
1225 env->cp15.c7_par_hi = 0;
1230 static const ARMCPRegInfo vapa_cp_reginfo[] = {
1231 { .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0,
1232 .access = PL1_RW, .resetvalue = 0,
1233 .fieldoffset = offsetof(CPUARMState, cp15.c7_par),
1234 .writefn = par_write },
1235 #ifndef CONFIG_USER_ONLY
1236 { .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY,
1237 .access = PL1_W, .accessfn = ats_access,
1238 .writefn = ats_write, .type = ARM_CP_NO_MIGRATE },
1243 /* Return basic MPU access permission bits. */
1244 static uint32_t simple_mpu_ap_bits(uint32_t val)
1251 for (i = 0; i < 16; i += 2) {
1252 ret |= (val >> i) & mask;
1258 /* Pad basic MPU access permission bits to extended format. */
1259 static uint32_t extended_mpu_ap_bits(uint32_t val)
1266 for (i = 0; i < 16; i += 2) {
1267 ret |= (val & mask) << i;
1273 static void pmsav5_data_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
1276 env->cp15.c5_data = extended_mpu_ap_bits(value);
1279 static uint64_t pmsav5_data_ap_read(CPUARMState *env, const ARMCPRegInfo *ri)
1281 return simple_mpu_ap_bits(env->cp15.c5_data);
1284 static void pmsav5_insn_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
1287 env->cp15.c5_insn = extended_mpu_ap_bits(value);
1290 static uint64_t pmsav5_insn_ap_read(CPUARMState *env, const ARMCPRegInfo *ri)
1292 return simple_mpu_ap_bits(env->cp15.c5_insn);
1295 static const ARMCPRegInfo pmsav5_cp_reginfo[] = {
1296 { .name = "DATA_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
1297 .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1298 .fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0,
1299 .readfn = pmsav5_data_ap_read, .writefn = pmsav5_data_ap_write, },
1300 { .name = "INSN_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
1301 .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1302 .fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0,
1303 .readfn = pmsav5_insn_ap_read, .writefn = pmsav5_insn_ap_write, },
1304 { .name = "DATA_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 2,
1306 .fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1307 { .name = "INSN_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 3,
1309 .fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0, },
1310 { .name = "DCACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
1312 .fieldoffset = offsetof(CPUARMState, cp15.c2_data), .resetvalue = 0, },
1313 { .name = "ICACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
1315 .fieldoffset = offsetof(CPUARMState, cp15.c2_insn), .resetvalue = 0, },
1316 /* Protection region base and size registers */
1317 { .name = "946_PRBS0", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0,
1318 .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1319 .fieldoffset = offsetof(CPUARMState, cp15.c6_region[0]) },
1320 { .name = "946_PRBS1", .cp = 15, .crn = 6, .crm = 1, .opc1 = 0,
1321 .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1322 .fieldoffset = offsetof(CPUARMState, cp15.c6_region[1]) },
1323 { .name = "946_PRBS2", .cp = 15, .crn = 6, .crm = 2, .opc1 = 0,
1324 .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1325 .fieldoffset = offsetof(CPUARMState, cp15.c6_region[2]) },
1326 { .name = "946_PRBS3", .cp = 15, .crn = 6, .crm = 3, .opc1 = 0,
1327 .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1328 .fieldoffset = offsetof(CPUARMState, cp15.c6_region[3]) },
1329 { .name = "946_PRBS4", .cp = 15, .crn = 6, .crm = 4, .opc1 = 0,
1330 .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1331 .fieldoffset = offsetof(CPUARMState, cp15.c6_region[4]) },
1332 { .name = "946_PRBS5", .cp = 15, .crn = 6, .crm = 5, .opc1 = 0,
1333 .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1334 .fieldoffset = offsetof(CPUARMState, cp15.c6_region[5]) },
1335 { .name = "946_PRBS6", .cp = 15, .crn = 6, .crm = 6, .opc1 = 0,
1336 .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1337 .fieldoffset = offsetof(CPUARMState, cp15.c6_region[6]) },
1338 { .name = "946_PRBS7", .cp = 15, .crn = 6, .crm = 7, .opc1 = 0,
1339 .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1340 .fieldoffset = offsetof(CPUARMState, cp15.c6_region[7]) },
1344 static void vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
1347 int maskshift = extract32(value, 0, 3);
1349 if (arm_feature(env, ARM_FEATURE_LPAE) && (value & (1 << 31))) {
1350 value &= ~((7 << 19) | (3 << 14) | (0xf << 3));
1354 /* Note that we always calculate c2_mask and c2_base_mask, but
1355 * they are only used for short-descriptor tables (ie if EAE is 0);
1356 * for long-descriptor tables the TTBCR fields are used differently
1357 * and the c2_mask and c2_base_mask values are meaningless.
1359 env->cp15.c2_control = value;
1360 env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> maskshift);
1361 env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> maskshift);
1364 static void vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1367 ARMCPU *cpu = arm_env_get_cpu(env);
1369 if (arm_feature(env, ARM_FEATURE_LPAE)) {
1370 /* With LPAE the TTBCR could result in a change of ASID
1371 * via the TTBCR.A1 bit, so do a TLB flush.
1373 tlb_flush(CPU(cpu), 1);
1375 vmsa_ttbcr_raw_write(env, ri, value);
1378 static void vmsa_ttbcr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1380 env->cp15.c2_base_mask = 0xffffc000u;
1381 env->cp15.c2_control = 0;
1382 env->cp15.c2_mask = 0;
1385 static void vmsa_tcr_el1_write(CPUARMState *env, const ARMCPRegInfo *ri,
1388 ARMCPU *cpu = arm_env_get_cpu(env);
1390 /* For AArch64 the A1 bit could result in a change of ASID, so TLB flush. */
1391 tlb_flush(CPU(cpu), 1);
1392 env->cp15.c2_control = value;
1395 static void vmsa_ttbr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1398 /* 64 bit accesses to the TTBRs can change the ASID and so we
1399 * must flush the TLB.
1401 if (cpreg_field_is_64bit(ri)) {
1402 ARMCPU *cpu = arm_env_get_cpu(env);
1404 tlb_flush(CPU(cpu), 1);
1406 raw_write(env, ri, value);
1409 static const ARMCPRegInfo vmsa_cp_reginfo[] = {
1410 { .name = "DFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
1412 .fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1413 { .name = "IFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
1415 .fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0, },
1416 { .name = "TTBR0_EL1", .state = ARM_CP_STATE_BOTH,
1417 .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
1418 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el1),
1419 .writefn = vmsa_ttbr_write, .resetvalue = 0 },
1420 { .name = "TTBR1_EL1", .state = ARM_CP_STATE_BOTH,
1421 .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
1422 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.ttbr1_el1),
1423 .writefn = vmsa_ttbr_write, .resetvalue = 0 },
1424 { .name = "TCR_EL1", .state = ARM_CP_STATE_AA64,
1425 .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
1426 .access = PL1_RW, .writefn = vmsa_tcr_el1_write,
1427 .resetfn = vmsa_ttbcr_reset, .raw_writefn = raw_write,
1428 .fieldoffset = offsetof(CPUARMState, cp15.c2_control) },
1429 { .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
1430 .access = PL1_RW, .type = ARM_CP_NO_MIGRATE, .writefn = vmsa_ttbcr_write,
1431 .resetfn = arm_cp_reset_ignore, .raw_writefn = vmsa_ttbcr_raw_write,
1432 .fieldoffset = offsetoflow32(CPUARMState, cp15.c2_control) },
1433 { .name = "DFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0,
1434 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c6_data),
1439 static void omap_ticonfig_write(CPUARMState *env, const ARMCPRegInfo *ri,
1442 env->cp15.c15_ticonfig = value & 0xe7;
1443 /* The OS_TYPE bit in this register changes the reported CPUID! */
1444 env->cp15.c0_cpuid = (value & (1 << 5)) ?
1445 ARM_CPUID_TI915T : ARM_CPUID_TI925T;
1448 static void omap_threadid_write(CPUARMState *env, const ARMCPRegInfo *ri,
1451 env->cp15.c15_threadid = value & 0xffff;
1454 static void omap_wfi_write(CPUARMState *env, const ARMCPRegInfo *ri,
1457 /* Wait-for-interrupt (deprecated) */
1458 cpu_interrupt(CPU(arm_env_get_cpu(env)), CPU_INTERRUPT_HALT);
1461 static void omap_cachemaint_write(CPUARMState *env, const ARMCPRegInfo *ri,
1464 /* On OMAP there are registers indicating the max/min index of dcache lines
1465 * containing a dirty line; cache flush operations have to reset these.
1467 env->cp15.c15_i_max = 0x000;
1468 env->cp15.c15_i_min = 0xff0;
1471 static const ARMCPRegInfo omap_cp_reginfo[] = {
1472 { .name = "DFSR", .cp = 15, .crn = 5, .crm = CP_ANY,
1473 .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_OVERRIDE,
1474 .fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1475 { .name = "", .cp = 15, .crn = 15, .crm = 0, .opc1 = 0, .opc2 = 0,
1476 .access = PL1_RW, .type = ARM_CP_NOP },
1477 { .name = "TICONFIG", .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0,
1479 .fieldoffset = offsetof(CPUARMState, cp15.c15_ticonfig), .resetvalue = 0,
1480 .writefn = omap_ticonfig_write },
1481 { .name = "IMAX", .cp = 15, .crn = 15, .crm = 2, .opc1 = 0, .opc2 = 0,
1483 .fieldoffset = offsetof(CPUARMState, cp15.c15_i_max), .resetvalue = 0, },
1484 { .name = "IMIN", .cp = 15, .crn = 15, .crm = 3, .opc1 = 0, .opc2 = 0,
1485 .access = PL1_RW, .resetvalue = 0xff0,
1486 .fieldoffset = offsetof(CPUARMState, cp15.c15_i_min) },
1487 { .name = "THREADID", .cp = 15, .crn = 15, .crm = 4, .opc1 = 0, .opc2 = 0,
1489 .fieldoffset = offsetof(CPUARMState, cp15.c15_threadid), .resetvalue = 0,
1490 .writefn = omap_threadid_write },
1491 { .name = "TI925T_STATUS", .cp = 15, .crn = 15,
1492 .crm = 8, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
1493 .type = ARM_CP_NO_MIGRATE,
1494 .readfn = arm_cp_read_zero, .writefn = omap_wfi_write, },
1495 /* TODO: Peripheral port remap register:
1496 * On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
1497 * base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
1500 { .name = "OMAP_CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
1501 .opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
1502 .type = ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE,
1503 .writefn = omap_cachemaint_write },
1504 { .name = "C9", .cp = 15, .crn = 9,
1505 .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW,
1506 .type = ARM_CP_CONST | ARM_CP_OVERRIDE, .resetvalue = 0 },
1510 static void xscale_cpar_write(CPUARMState *env, const ARMCPRegInfo *ri,
1514 if (env->cp15.c15_cpar != value) {
1515 /* Changes cp0 to cp13 behavior, so needs a TB flush. */
1517 env->cp15.c15_cpar = value;
1521 static const ARMCPRegInfo xscale_cp_reginfo[] = {
1522 { .name = "XSCALE_CPAR",
1523 .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
1524 .fieldoffset = offsetof(CPUARMState, cp15.c15_cpar), .resetvalue = 0,
1525 .writefn = xscale_cpar_write, },
1526 { .name = "XSCALE_AUXCR",
1527 .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, .access = PL1_RW,
1528 .fieldoffset = offsetof(CPUARMState, cp15.c1_xscaleauxcr),
1533 static const ARMCPRegInfo dummy_c15_cp_reginfo[] = {
1534 /* RAZ/WI the whole crn=15 space, when we don't have a more specific
1535 * implementation of this implementation-defined space.
1536 * Ideally this should eventually disappear in favour of actually
1537 * implementing the correct behaviour for all cores.
1539 { .name = "C15_IMPDEF", .cp = 15, .crn = 15,
1540 .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
1542 .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE | ARM_CP_OVERRIDE,
1547 static const ARMCPRegInfo cache_dirty_status_cp_reginfo[] = {
1548 /* Cache status: RAZ because we have no cache so it's always clean */
1549 { .name = "CDSR", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 6,
1550 .access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1555 static const ARMCPRegInfo cache_block_ops_cp_reginfo[] = {
1556 /* We never have a a block transfer operation in progress */
1557 { .name = "BXSR", .cp = 15, .crn = 7, .crm = 12, .opc1 = 0, .opc2 = 4,
1558 .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1560 /* The cache ops themselves: these all NOP for QEMU */
1561 { .name = "IICR", .cp = 15, .crm = 5, .opc1 = 0,
1562 .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1563 { .name = "IDCR", .cp = 15, .crm = 6, .opc1 = 0,
1564 .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1565 { .name = "CDCR", .cp = 15, .crm = 12, .opc1 = 0,
1566 .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1567 { .name = "PIR", .cp = 15, .crm = 12, .opc1 = 1,
1568 .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1569 { .name = "PDR", .cp = 15, .crm = 12, .opc1 = 2,
1570 .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1571 { .name = "CIDCR", .cp = 15, .crm = 14, .opc1 = 0,
1572 .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1576 static const ARMCPRegInfo cache_test_clean_cp_reginfo[] = {
1577 /* The cache test-and-clean instructions always return (1 << 30)
1578 * to indicate that there are no dirty cache lines.
1580 { .name = "TC_DCACHE", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 3,
1581 .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1582 .resetvalue = (1 << 30) },
1583 { .name = "TCI_DCACHE", .cp = 15, .crn = 7, .crm = 14, .opc1 = 0, .opc2 = 3,
1584 .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1585 .resetvalue = (1 << 30) },
1589 static const ARMCPRegInfo strongarm_cp_reginfo[] = {
1590 /* Ignore ReadBuffer accesses */
1591 { .name = "C9_READBUFFER", .cp = 15, .crn = 9,
1592 .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
1593 .access = PL1_RW, .resetvalue = 0,
1594 .type = ARM_CP_CONST | ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE },
1598 static uint64_t mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
1600 CPUState *cs = CPU(arm_env_get_cpu(env));
1601 uint32_t mpidr = cs->cpu_index;
1602 /* We don't support setting cluster ID ([8..11]) (known as Aff1
1603 * in later ARM ARM versions), or any of the higher affinity level fields,
1604 * so these bits always RAZ.
1606 if (arm_feature(env, ARM_FEATURE_V7MP)) {
1607 mpidr |= (1U << 31);
1608 /* Cores which are uniprocessor (non-coherent)
1609 * but still implement the MP extensions set
1610 * bit 30. (For instance, A9UP.) However we do
1611 * not currently model any of those cores.
1617 static const ARMCPRegInfo mpidr_cp_reginfo[] = {
1618 { .name = "MPIDR", .state = ARM_CP_STATE_BOTH,
1619 .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5,
1620 .access = PL1_R, .readfn = mpidr_read, .type = ARM_CP_NO_MIGRATE },
1624 static uint64_t par64_read(CPUARMState *env, const ARMCPRegInfo *ri)
1626 return ((uint64_t)env->cp15.c7_par_hi << 32) | env->cp15.c7_par;
1629 static void par64_write(CPUARMState *env, const ARMCPRegInfo *ri,
1632 env->cp15.c7_par_hi = value >> 32;
1633 env->cp15.c7_par = value;
1636 static void par64_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1638 env->cp15.c7_par_hi = 0;
1639 env->cp15.c7_par = 0;
1642 static const ARMCPRegInfo lpae_cp_reginfo[] = {
1643 /* NOP AMAIR0/1: the override is because these clash with the rather
1644 * broadly specified TLB_LOCKDOWN entry in the generic cp_reginfo.
1646 { .name = "AMAIR0", .state = ARM_CP_STATE_BOTH,
1647 .opc0 = 3, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 0,
1648 .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
1650 /* AMAIR1 is mapped to AMAIR_EL1[63:32] */
1651 { .name = "AMAIR1", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 1,
1652 .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
1654 /* 64 bit access versions of the (dummy) debug registers */
1655 { .name = "DBGDRAR", .cp = 14, .crm = 1, .opc1 = 0,
1656 .access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
1657 { .name = "DBGDSAR", .cp = 14, .crm = 2, .opc1 = 0,
1658 .access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
1659 { .name = "PAR", .cp = 15, .crm = 7, .opc1 = 0,
1660 .access = PL1_RW, .type = ARM_CP_64BIT,
1661 .readfn = par64_read, .writefn = par64_write, .resetfn = par64_reset },
1662 { .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0,
1663 .access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE,
1664 .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el1),
1665 .writefn = vmsa_ttbr_write, .resetfn = arm_cp_reset_ignore },
1666 { .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1,
1667 .access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE,
1668 .fieldoffset = offsetof(CPUARMState, cp15.ttbr1_el1),
1669 .writefn = vmsa_ttbr_write, .resetfn = arm_cp_reset_ignore },
1673 static uint64_t aa64_fpcr_read(CPUARMState *env, const ARMCPRegInfo *ri)
1675 return vfp_get_fpcr(env);
1678 static void aa64_fpcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1681 vfp_set_fpcr(env, value);
1684 static uint64_t aa64_fpsr_read(CPUARMState *env, const ARMCPRegInfo *ri)
1686 return vfp_get_fpsr(env);
1689 static void aa64_fpsr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1692 vfp_set_fpsr(env, value);
1695 static CPAccessResult aa64_daif_access(CPUARMState *env, const ARMCPRegInfo *ri)
1697 if (arm_current_pl(env) == 0 && !(env->cp15.c1_sys & SCTLR_UMA)) {
1698 return CP_ACCESS_TRAP;
1700 return CP_ACCESS_OK;
1703 static void aa64_daif_write(CPUARMState *env, const ARMCPRegInfo *ri,
1706 env->daif = value & PSTATE_DAIF;
1709 static CPAccessResult aa64_cacheop_access(CPUARMState *env,
1710 const ARMCPRegInfo *ri)
1712 /* Cache invalidate/clean: NOP, but EL0 must UNDEF unless
1713 * SCTLR_EL1.UCI is set.
1715 if (arm_current_pl(env) == 0 && !(env->cp15.c1_sys & SCTLR_UCI)) {
1716 return CP_ACCESS_TRAP;
1718 return CP_ACCESS_OK;
1721 static void tlbi_aa64_va_write(CPUARMState *env, const ARMCPRegInfo *ri,
1724 /* Invalidate by VA (AArch64 version) */
1725 ARMCPU *cpu = arm_env_get_cpu(env);
1726 uint64_t pageaddr = value << 12;
1727 tlb_flush_page(CPU(cpu), pageaddr);
1730 static void tlbi_aa64_vaa_write(CPUARMState *env, const ARMCPRegInfo *ri,
1733 /* Invalidate by VA, all ASIDs (AArch64 version) */
1734 ARMCPU *cpu = arm_env_get_cpu(env);
1735 uint64_t pageaddr = value << 12;
1736 tlb_flush_page(CPU(cpu), pageaddr);
1739 static void tlbi_aa64_asid_write(CPUARMState *env, const ARMCPRegInfo *ri,
1742 /* Invalidate by ASID (AArch64 version) */
1743 ARMCPU *cpu = arm_env_get_cpu(env);
1744 int asid = extract64(value, 48, 16);
1745 tlb_flush(CPU(cpu), asid == 0);
1748 static const ARMCPRegInfo v8_cp_reginfo[] = {
1749 /* Minimal set of EL0-visible registers. This will need to be expanded
1750 * significantly for system emulation of AArch64 CPUs.
1752 { .name = "NZCV", .state = ARM_CP_STATE_AA64,
1753 .opc0 = 3, .opc1 = 3, .opc2 = 0, .crn = 4, .crm = 2,
1754 .access = PL0_RW, .type = ARM_CP_NZCV },
1755 { .name = "DAIF", .state = ARM_CP_STATE_AA64,
1756 .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 4, .crm = 2,
1757 .type = ARM_CP_NO_MIGRATE,
1758 .access = PL0_RW, .accessfn = aa64_daif_access,
1759 .fieldoffset = offsetof(CPUARMState, daif),
1760 .writefn = aa64_daif_write, .resetfn = arm_cp_reset_ignore },
1761 { .name = "FPCR", .state = ARM_CP_STATE_AA64,
1762 .opc0 = 3, .opc1 = 3, .opc2 = 0, .crn = 4, .crm = 4,
1763 .access = PL0_RW, .readfn = aa64_fpcr_read, .writefn = aa64_fpcr_write },
1764 { .name = "FPSR", .state = ARM_CP_STATE_AA64,
1765 .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 4, .crm = 4,
1766 .access = PL0_RW, .readfn = aa64_fpsr_read, .writefn = aa64_fpsr_write },
1767 /* Prohibit use of DC ZVA. OPTME: implement DC ZVA and allow its use.
1768 * For system mode the DZP bit here will need to be computed, not constant.
1770 { .name = "DCZID_EL0", .state = ARM_CP_STATE_AA64,
1771 .opc0 = 3, .opc1 = 3, .opc2 = 7, .crn = 0, .crm = 0,
1772 .access = PL0_R, .type = ARM_CP_CONST,
1773 .resetvalue = 0x10 },
1774 { .name = "CURRENTEL", .state = ARM_CP_STATE_AA64,
1775 .opc0 = 3, .opc1 = 0, .opc2 = 2, .crn = 4, .crm = 2,
1776 .access = PL1_R, .type = ARM_CP_CURRENTEL },
1777 /* Cache ops: all NOPs since we don't emulate caches */
1778 { .name = "IC_IALLUIS", .state = ARM_CP_STATE_AA64,
1779 .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 0,
1780 .access = PL1_W, .type = ARM_CP_NOP },
1781 { .name = "IC_IALLU", .state = ARM_CP_STATE_AA64,
1782 .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 0,
1783 .access = PL1_W, .type = ARM_CP_NOP },
1784 { .name = "IC_IVAU", .state = ARM_CP_STATE_AA64,
1785 .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 5, .opc2 = 1,
1786 .access = PL0_W, .type = ARM_CP_NOP,
1787 .accessfn = aa64_cacheop_access },
1788 { .name = "DC_IVAC", .state = ARM_CP_STATE_AA64,
1789 .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 1,
1790 .access = PL1_W, .type = ARM_CP_NOP },
1791 { .name = "DC_ISW", .state = ARM_CP_STATE_AA64,
1792 .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 2,
1793 .access = PL1_W, .type = ARM_CP_NOP },
1794 { .name = "DC_CVAC", .state = ARM_CP_STATE_AA64,
1795 .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 10, .opc2 = 1,
1796 .access = PL0_W, .type = ARM_CP_NOP,
1797 .accessfn = aa64_cacheop_access },
1798 { .name = "DC_CSW", .state = ARM_CP_STATE_AA64,
1799 .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 2,
1800 .access = PL1_W, .type = ARM_CP_NOP },
1801 { .name = "DC_CVAU", .state = ARM_CP_STATE_AA64,
1802 .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 11, .opc2 = 1,
1803 .access = PL0_W, .type = ARM_CP_NOP,
1804 .accessfn = aa64_cacheop_access },
1805 { .name = "DC_CIVAC", .state = ARM_CP_STATE_AA64,
1806 .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 14, .opc2 = 1,
1807 .access = PL0_W, .type = ARM_CP_NOP,
1808 .accessfn = aa64_cacheop_access },
1809 { .name = "DC_CISW", .state = ARM_CP_STATE_AA64,
1810 .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 2,
1811 .access = PL1_W, .type = ARM_CP_NOP },
1812 /* TLBI operations */
1813 { .name = "TLBI_VMALLE1IS", .state = ARM_CP_STATE_AA64,
1814 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 3, .opc2 = 0,
1815 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1816 .writefn = tlbiall_write },
1817 { .name = "TLBI_VAE1IS", .state = ARM_CP_STATE_AA64,
1818 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 3, .opc2 = 1,
1819 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1820 .writefn = tlbi_aa64_va_write },
1821 { .name = "TLBI_ASIDE1IS", .state = ARM_CP_STATE_AA64,
1822 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 3, .opc2 = 2,
1823 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1824 .writefn = tlbi_aa64_asid_write },
1825 { .name = "TLBI_VAAE1IS", .state = ARM_CP_STATE_AA64,
1826 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 3, .opc2 = 3,
1827 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1828 .writefn = tlbi_aa64_vaa_write },
1829 { .name = "TLBI_VALE1IS", .state = ARM_CP_STATE_AA64,
1830 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 3, .opc2 = 5,
1831 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1832 .writefn = tlbi_aa64_va_write },
1833 { .name = "TLBI_VAALE1IS", .state = ARM_CP_STATE_AA64,
1834 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 3, .opc2 = 7,
1835 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1836 .writefn = tlbi_aa64_vaa_write },
1837 { .name = "TLBI_VMALLE1", .state = ARM_CP_STATE_AA64,
1838 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 7, .opc2 = 0,
1839 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1840 .writefn = tlbiall_write },
1841 { .name = "TLBI_VAE1", .state = ARM_CP_STATE_AA64,
1842 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 7, .opc2 = 1,
1843 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1844 .writefn = tlbi_aa64_va_write },
1845 { .name = "TLBI_ASIDE1", .state = ARM_CP_STATE_AA64,
1846 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 7, .opc2 = 2,
1847 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1848 .writefn = tlbi_aa64_asid_write },
1849 { .name = "TLBI_VAAE1", .state = ARM_CP_STATE_AA64,
1850 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 7, .opc2 = 3,
1851 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1852 .writefn = tlbi_aa64_vaa_write },
1853 { .name = "TLBI_VALE1", .state = ARM_CP_STATE_AA64,
1854 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 7, .opc2 = 5,
1855 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1856 .writefn = tlbi_aa64_va_write },
1857 { .name = "TLBI_VAALE1", .state = ARM_CP_STATE_AA64,
1858 .opc0 = 1, .opc2 = 0, .crn = 8, .crm = 7, .opc2 = 7,
1859 .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1860 .writefn = tlbi_aa64_vaa_write },
1861 /* Dummy implementation of monitor debug system control register:
1862 * we don't support debug.
1864 { .name = "MDSCR_EL1", .state = ARM_CP_STATE_AA64,
1865 .opc0 = 2, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 2,
1866 .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
1867 /* We define a dummy WI OSLAR_EL1, because Linux writes to it. */
1868 { .name = "OSLAR_EL1", .state = ARM_CP_STATE_AA64,
1869 .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 4,
1870 .access = PL1_W, .type = ARM_CP_NOP },
1874 static void sctlr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1877 ARMCPU *cpu = arm_env_get_cpu(env);
1879 env->cp15.c1_sys = value;
1880 /* ??? Lots of these bits are not implemented. */
1881 /* This may enable/disable the MMU, so do a TLB flush. */
1882 tlb_flush(CPU(cpu), 1);
1885 static CPAccessResult ctr_el0_access(CPUARMState *env, const ARMCPRegInfo *ri)
1887 /* Only accessible in EL0 if SCTLR.UCT is set (and only in AArch64,
1888 * but the AArch32 CTR has its own reginfo struct)
1890 if (arm_current_pl(env) == 0 && !(env->cp15.c1_sys & SCTLR_UCT)) {
1891 return CP_ACCESS_TRAP;
1893 return CP_ACCESS_OK;
1896 static void define_aarch64_debug_regs(ARMCPU *cpu)
1898 /* Define breakpoint and watchpoint registers. These do nothing
1899 * but read as written, for now.
1903 for (i = 0; i < 16; i++) {
1904 ARMCPRegInfo dbgregs[] = {
1905 { .name = "DBGBVR", .state = ARM_CP_STATE_AA64,
1906 .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 4,
1908 .fieldoffset = offsetof(CPUARMState, cp15.dbgbvr[i]) },
1909 { .name = "DBGBCR", .state = ARM_CP_STATE_AA64,
1910 .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 5,
1912 .fieldoffset = offsetof(CPUARMState, cp15.dbgbcr[i]) },
1913 { .name = "DBGWVR", .state = ARM_CP_STATE_AA64,
1914 .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 6,
1916 .fieldoffset = offsetof(CPUARMState, cp15.dbgwvr[i]) },
1917 { .name = "DBGWCR", .state = ARM_CP_STATE_AA64,
1918 .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 7,
1920 .fieldoffset = offsetof(CPUARMState, cp15.dbgwcr[i]) },
1923 define_arm_cp_regs(cpu, dbgregs);
1927 void register_cp_regs_for_features(ARMCPU *cpu)
1929 /* Register all the coprocessor registers based on feature bits */
1930 CPUARMState *env = &cpu->env;
1931 if (arm_feature(env, ARM_FEATURE_M)) {
1932 /* M profile has no coprocessor registers */
1936 define_arm_cp_regs(cpu, cp_reginfo);
1937 if (arm_feature(env, ARM_FEATURE_V6)) {
1938 /* The ID registers all have impdef reset values */
1939 ARMCPRegInfo v6_idregs[] = {
1940 { .name = "ID_PFR0", .cp = 15, .crn = 0, .crm = 1,
1941 .opc1 = 0, .opc2 = 0, .access = PL1_R, .type = ARM_CP_CONST,
1942 .resetvalue = cpu->id_pfr0 },
1943 { .name = "ID_PFR1", .cp = 15, .crn = 0, .crm = 1,
1944 .opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST,
1945 .resetvalue = cpu->id_pfr1 },
1946 { .name = "ID_DFR0", .cp = 15, .crn = 0, .crm = 1,
1947 .opc1 = 0, .opc2 = 2, .access = PL1_R, .type = ARM_CP_CONST,
1948 .resetvalue = cpu->id_dfr0 },
1949 { .name = "ID_AFR0", .cp = 15, .crn = 0, .crm = 1,
1950 .opc1 = 0, .opc2 = 3, .access = PL1_R, .type = ARM_CP_CONST,
1951 .resetvalue = cpu->id_afr0 },
1952 { .name = "ID_MMFR0", .cp = 15, .crn = 0, .crm = 1,
1953 .opc1 = 0, .opc2 = 4, .access = PL1_R, .type = ARM_CP_CONST,
1954 .resetvalue = cpu->id_mmfr0 },
1955 { .name = "ID_MMFR1", .cp = 15, .crn = 0, .crm = 1,
1956 .opc1 = 0, .opc2 = 5, .access = PL1_R, .type = ARM_CP_CONST,
1957 .resetvalue = cpu->id_mmfr1 },
1958 { .name = "ID_MMFR2", .cp = 15, .crn = 0, .crm = 1,
1959 .opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST,
1960 .resetvalue = cpu->id_mmfr2 },
1961 { .name = "ID_MMFR3", .cp = 15, .crn = 0, .crm = 1,
1962 .opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST,
1963 .resetvalue = cpu->id_mmfr3 },
1964 { .name = "ID_ISAR0", .cp = 15, .crn = 0, .crm = 2,
1965 .opc1 = 0, .opc2 = 0, .access = PL1_R, .type = ARM_CP_CONST,
1966 .resetvalue = cpu->id_isar0 },
1967 { .name = "ID_ISAR1", .cp = 15, .crn = 0, .crm = 2,
1968 .opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST,
1969 .resetvalue = cpu->id_isar1 },
1970 { .name = "ID_ISAR2", .cp = 15, .crn = 0, .crm = 2,
1971 .opc1 = 0, .opc2 = 2, .access = PL1_R, .type = ARM_CP_CONST,
1972 .resetvalue = cpu->id_isar2 },
1973 { .name = "ID_ISAR3", .cp = 15, .crn = 0, .crm = 2,
1974 .opc1 = 0, .opc2 = 3, .access = PL1_R, .type = ARM_CP_CONST,
1975 .resetvalue = cpu->id_isar3 },
1976 { .name = "ID_ISAR4", .cp = 15, .crn = 0, .crm = 2,
1977 .opc1 = 0, .opc2 = 4, .access = PL1_R, .type = ARM_CP_CONST,
1978 .resetvalue = cpu->id_isar4 },
1979 { .name = "ID_ISAR5", .cp = 15, .crn = 0, .crm = 2,
1980 .opc1 = 0, .opc2 = 5, .access = PL1_R, .type = ARM_CP_CONST,
1981 .resetvalue = cpu->id_isar5 },
1982 /* 6..7 are as yet unallocated and must RAZ */
1983 { .name = "ID_ISAR6", .cp = 15, .crn = 0, .crm = 2,
1984 .opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST,
1986 { .name = "ID_ISAR7", .cp = 15, .crn = 0, .crm = 2,
1987 .opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST,
1991 define_arm_cp_regs(cpu, v6_idregs);
1992 define_arm_cp_regs(cpu, v6_cp_reginfo);
1994 define_arm_cp_regs(cpu, not_v6_cp_reginfo);
1996 if (arm_feature(env, ARM_FEATURE_V6K)) {
1997 define_arm_cp_regs(cpu, v6k_cp_reginfo);
1999 if (arm_feature(env, ARM_FEATURE_V7)) {
2000 /* v7 performance monitor control register: same implementor
2001 * field as main ID register, and we implement only the cycle
2004 #ifndef CONFIG_USER_ONLY
2005 ARMCPRegInfo pmcr = {
2006 .name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0,
2007 .access = PL0_RW, .resetvalue = cpu->midr & 0xff000000,
2009 .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcr),
2010 .accessfn = pmreg_access, .writefn = pmcr_write,
2011 .raw_writefn = raw_write,
2013 define_one_arm_cp_reg(cpu, &pmcr);
2015 ARMCPRegInfo clidr = {
2016 .name = "CLIDR", .state = ARM_CP_STATE_BOTH,
2017 .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1,
2018 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->clidr
2020 define_one_arm_cp_reg(cpu, &clidr);
2021 define_arm_cp_regs(cpu, v7_cp_reginfo);
2023 define_arm_cp_regs(cpu, not_v7_cp_reginfo);
2025 if (arm_feature(env, ARM_FEATURE_V8)) {
2026 /* AArch64 ID registers, which all have impdef reset values */
2027 ARMCPRegInfo v8_idregs[] = {
2028 { .name = "ID_AA64PFR0_EL1", .state = ARM_CP_STATE_AA64,
2029 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 0,
2030 .access = PL1_R, .type = ARM_CP_CONST,
2031 .resetvalue = cpu->id_aa64pfr0 },
2032 { .name = "ID_AA64PFR1_EL1", .state = ARM_CP_STATE_AA64,
2033 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 1,
2034 .access = PL1_R, .type = ARM_CP_CONST,
2035 .resetvalue = cpu->id_aa64pfr1},
2036 { .name = "ID_AA64DFR0_EL1", .state = ARM_CP_STATE_AA64,
2037 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 0,
2038 .access = PL1_R, .type = ARM_CP_CONST,
2039 /* We mask out the PMUVer field, beacuse we don't currently
2040 * implement the PMU. Not advertising it prevents the guest
2041 * from trying to use it and getting UNDEFs on registers we
2044 .resetvalue = cpu->id_aa64dfr0 & ~0xf00 },
2045 { .name = "ID_AA64DFR1_EL1", .state = ARM_CP_STATE_AA64,
2046 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 1,
2047 .access = PL1_R, .type = ARM_CP_CONST,
2048 .resetvalue = cpu->id_aa64dfr1 },
2049 { .name = "ID_AA64AFR0_EL1", .state = ARM_CP_STATE_AA64,
2050 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 4,
2051 .access = PL1_R, .type = ARM_CP_CONST,
2052 .resetvalue = cpu->id_aa64afr0 },
2053 { .name = "ID_AA64AFR1_EL1", .state = ARM_CP_STATE_AA64,
2054 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 5,
2055 .access = PL1_R, .type = ARM_CP_CONST,
2056 .resetvalue = cpu->id_aa64afr1 },
2057 { .name = "ID_AA64ISAR0_EL1", .state = ARM_CP_STATE_AA64,
2058 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 0,
2059 .access = PL1_R, .type = ARM_CP_CONST,
2060 .resetvalue = cpu->id_aa64isar0 },
2061 { .name = "ID_AA64ISAR1_EL1", .state = ARM_CP_STATE_AA64,
2062 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 1,
2063 .access = PL1_R, .type = ARM_CP_CONST,
2064 .resetvalue = cpu->id_aa64isar1 },
2065 { .name = "ID_AA64MMFR0_EL1", .state = ARM_CP_STATE_AA64,
2066 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 0,
2067 .access = PL1_R, .type = ARM_CP_CONST,
2068 .resetvalue = cpu->id_aa64mmfr0 },
2069 { .name = "ID_AA64MMFR1_EL1", .state = ARM_CP_STATE_AA64,
2070 .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 1,
2071 .access = PL1_R, .type = ARM_CP_CONST,
2072 .resetvalue = cpu->id_aa64mmfr1 },
2075 define_arm_cp_regs(cpu, v8_idregs);
2076 define_arm_cp_regs(cpu, v8_cp_reginfo);
2077 define_aarch64_debug_regs(cpu);
2079 if (arm_feature(env, ARM_FEATURE_MPU)) {
2080 /* These are the MPU registers prior to PMSAv6. Any new
2081 * PMSA core later than the ARM946 will require that we
2082 * implement the PMSAv6 or PMSAv7 registers, which are
2083 * completely different.
2085 assert(!arm_feature(env, ARM_FEATURE_V6));
2086 define_arm_cp_regs(cpu, pmsav5_cp_reginfo);
2088 define_arm_cp_regs(cpu, vmsa_cp_reginfo);
2090 if (arm_feature(env, ARM_FEATURE_THUMB2EE)) {
2091 define_arm_cp_regs(cpu, t2ee_cp_reginfo);
2093 if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
2094 define_arm_cp_regs(cpu, generic_timer_cp_reginfo);
2096 if (arm_feature(env, ARM_FEATURE_VAPA)) {
2097 define_arm_cp_regs(cpu, vapa_cp_reginfo);
2099 if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) {
2100 define_arm_cp_regs(cpu, cache_test_clean_cp_reginfo);
2102 if (arm_feature(env, ARM_FEATURE_CACHE_DIRTY_REG)) {
2103 define_arm_cp_regs(cpu, cache_dirty_status_cp_reginfo);
2105 if (arm_feature(env, ARM_FEATURE_CACHE_BLOCK_OPS)) {
2106 define_arm_cp_regs(cpu, cache_block_ops_cp_reginfo);
2108 if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
2109 define_arm_cp_regs(cpu, omap_cp_reginfo);
2111 if (arm_feature(env, ARM_FEATURE_STRONGARM)) {
2112 define_arm_cp_regs(cpu, strongarm_cp_reginfo);
2114 if (arm_feature(env, ARM_FEATURE_XSCALE)) {
2115 define_arm_cp_regs(cpu, xscale_cp_reginfo);
2117 if (arm_feature(env, ARM_FEATURE_DUMMY_C15_REGS)) {
2118 define_arm_cp_regs(cpu, dummy_c15_cp_reginfo);
2120 if (arm_feature(env, ARM_FEATURE_LPAE)) {
2121 define_arm_cp_regs(cpu, lpae_cp_reginfo);
2123 /* Slightly awkwardly, the OMAP and StrongARM cores need all of
2124 * cp15 crn=0 to be writes-ignored, whereas for other cores they should
2125 * be read-only (ie write causes UNDEF exception).
2128 ARMCPRegInfo id_cp_reginfo[] = {
2129 /* Note that the MIDR isn't a simple constant register because
2130 * of the TI925 behaviour where writes to another register can
2131 * cause the MIDR value to change.
2133 * Unimplemented registers in the c15 0 0 0 space default to
2134 * MIDR. Define MIDR first as this entire space, then CTR, TCMTR
2135 * and friends override accordingly.
2138 .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY,
2139 .access = PL1_R, .resetvalue = cpu->midr,
2140 .writefn = arm_cp_write_ignore, .raw_writefn = raw_write,
2141 .fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid),
2142 .type = ARM_CP_OVERRIDE },
2143 { .name = "MIDR_EL1", .state = ARM_CP_STATE_AA64,
2144 .opc0 = 3, .opc1 = 0, .opc2 = 0, .crn = 0, .crm = 0,
2145 .access = PL1_R, .resetvalue = cpu->midr, .type = ARM_CP_CONST },
2147 .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1,
2148 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->ctr },
2149 { .name = "CTR_EL0", .state = ARM_CP_STATE_AA64,
2150 .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 0, .crm = 0,
2151 .access = PL0_R, .accessfn = ctr_el0_access,
2152 .type = ARM_CP_CONST, .resetvalue = cpu->ctr },
2154 .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 2,
2155 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2157 .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 3,
2158 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2159 /* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
2161 .cp = 15, .crn = 0, .crm = 3, .opc1 = 0, .opc2 = CP_ANY,
2162 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2164 .cp = 15, .crn = 0, .crm = 4, .opc1 = 0, .opc2 = CP_ANY,
2165 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2167 .cp = 15, .crn = 0, .crm = 5, .opc1 = 0, .opc2 = CP_ANY,
2168 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2170 .cp = 15, .crn = 0, .crm = 6, .opc1 = 0, .opc2 = CP_ANY,
2171 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2173 .cp = 15, .crn = 0, .crm = 7, .opc1 = 0, .opc2 = CP_ANY,
2174 .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2177 ARMCPRegInfo crn0_wi_reginfo = {
2178 .name = "CRN0_WI", .cp = 15, .crn = 0, .crm = CP_ANY,
2179 .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_W,
2180 .type = ARM_CP_NOP | ARM_CP_OVERRIDE
2182 if (arm_feature(env, ARM_FEATURE_OMAPCP) ||
2183 arm_feature(env, ARM_FEATURE_STRONGARM)) {
2185 /* Register the blanket "writes ignored" value first to cover the
2186 * whole space. Then update the specific ID registers to allow write
2187 * access, so that they ignore writes rather than causing them to
2190 define_one_arm_cp_reg(cpu, &crn0_wi_reginfo);
2191 for (r = id_cp_reginfo; r->type != ARM_CP_SENTINEL; r++) {
2195 define_arm_cp_regs(cpu, id_cp_reginfo);
2198 if (arm_feature(env, ARM_FEATURE_MPIDR)) {
2199 define_arm_cp_regs(cpu, mpidr_cp_reginfo);
2202 if (arm_feature(env, ARM_FEATURE_AUXCR)) {
2203 ARMCPRegInfo auxcr = {
2204 .name = "AUXCR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1,
2205 .access = PL1_RW, .type = ARM_CP_CONST,
2206 .resetvalue = cpu->reset_auxcr
2208 define_one_arm_cp_reg(cpu, &auxcr);
2211 if (arm_feature(env, ARM_FEATURE_CBAR)) {
2212 ARMCPRegInfo cbar = {
2213 .name = "CBAR", .cp = 15, .crn = 15, .crm = 0, .opc1 = 4, .opc2 = 0,
2214 .access = PL1_R|PL3_W, .resetvalue = cpu->reset_cbar,
2215 .fieldoffset = offsetof(CPUARMState, cp15.c15_config_base_address)
2217 define_one_arm_cp_reg(cpu, &cbar);
2220 /* Generic registers whose values depend on the implementation */
2222 ARMCPRegInfo sctlr = {
2223 .name = "SCTLR", .state = ARM_CP_STATE_BOTH,
2224 .opc0 = 3, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
2225 .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_sys),
2226 .writefn = sctlr_write, .resetvalue = cpu->reset_sctlr,
2227 .raw_writefn = raw_write,
2229 if (arm_feature(env, ARM_FEATURE_XSCALE)) {
2230 /* Normally we would always end the TB on an SCTLR write, but Linux
2231 * arch/arm/mach-pxa/sleep.S expects two instructions following
2232 * an MMU enable to execute from cache. Imitate this behaviour.
2234 sctlr.type |= ARM_CP_SUPPRESS_TB_END;
2236 define_one_arm_cp_reg(cpu, &sctlr);
2240 ARMCPU *cpu_arm_init(const char *cpu_model)
2242 return ARM_CPU(cpu_generic_init(TYPE_ARM_CPU, cpu_model));
2245 void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu)
2247 CPUState *cs = CPU(cpu);
2248 CPUARMState *env = &cpu->env;
2250 if (arm_feature(env, ARM_FEATURE_AARCH64)) {
2251 gdb_register_coprocessor(cs, aarch64_fpu_gdb_get_reg,
2252 aarch64_fpu_gdb_set_reg,
2253 34, "aarch64-fpu.xml", 0);
2254 } else if (arm_feature(env, ARM_FEATURE_NEON)) {
2255 gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
2256 51, "arm-neon.xml", 0);
2257 } else if (arm_feature(env, ARM_FEATURE_VFP3)) {
2258 gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
2259 35, "arm-vfp3.xml", 0);
2260 } else if (arm_feature(env, ARM_FEATURE_VFP)) {
2261 gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
2262 19, "arm-vfp.xml", 0);
2266 /* Sort alphabetically by type name, except for "any". */
2267 static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b)
2269 ObjectClass *class_a = (ObjectClass *)a;
2270 ObjectClass *class_b = (ObjectClass *)b;
2271 const char *name_a, *name_b;
2273 name_a = object_class_get_name(class_a);
2274 name_b = object_class_get_name(class_b);
2275 if (strcmp(name_a, "any-" TYPE_ARM_CPU) == 0) {
2277 } else if (strcmp(name_b, "any-" TYPE_ARM_CPU) == 0) {
2280 return strcmp(name_a, name_b);
2284 static void arm_cpu_list_entry(gpointer data, gpointer user_data)
2286 ObjectClass *oc = data;
2287 CPUListState *s = user_data;
2288 const char *typename;
2291 typename = object_class_get_name(oc);
2292 name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_ARM_CPU));
2293 (*s->cpu_fprintf)(s->file, " %s\n",
2298 void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
2302 .cpu_fprintf = cpu_fprintf,
2306 list = object_class_get_list(TYPE_ARM_CPU, false);
2307 list = g_slist_sort(list, arm_cpu_list_compare);
2308 (*cpu_fprintf)(f, "Available CPUs:\n");
2309 g_slist_foreach(list, arm_cpu_list_entry, &s);
2312 /* The 'host' CPU type is dynamically registered only if KVM is
2313 * enabled, so we have to special-case it here:
2315 (*cpu_fprintf)(f, " host (only available in KVM mode)\n");
2319 static void arm_cpu_add_definition(gpointer data, gpointer user_data)
2321 ObjectClass *oc = data;
2322 CpuDefinitionInfoList **cpu_list = user_data;
2323 CpuDefinitionInfoList *entry;
2324 CpuDefinitionInfo *info;
2325 const char *typename;
2327 typename = object_class_get_name(oc);
2328 info = g_malloc0(sizeof(*info));
2329 info->name = g_strndup(typename,
2330 strlen(typename) - strlen("-" TYPE_ARM_CPU));
2332 entry = g_malloc0(sizeof(*entry));
2333 entry->value = info;
2334 entry->next = *cpu_list;
2338 CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
2340 CpuDefinitionInfoList *cpu_list = NULL;
2343 list = object_class_get_list(TYPE_ARM_CPU, false);
2344 g_slist_foreach(list, arm_cpu_add_definition, &cpu_list);
2350 static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
2351 void *opaque, int state,
2352 int crm, int opc1, int opc2)
2354 /* Private utility function for define_one_arm_cp_reg_with_opaque():
2355 * add a single reginfo struct to the hash table.
2357 uint32_t *key = g_new(uint32_t, 1);
2358 ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo));
2359 int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0;
2360 if (r->state == ARM_CP_STATE_BOTH && state == ARM_CP_STATE_AA32) {
2361 /* The AArch32 view of a shared register sees the lower 32 bits
2362 * of a 64 bit backing field. It is not migratable as the AArch64
2363 * view handles that. AArch64 also handles reset.
2364 * We assume it is a cp15 register.
2367 r2->type |= ARM_CP_NO_MIGRATE;
2368 r2->resetfn = arm_cp_reset_ignore;
2369 #ifdef HOST_WORDS_BIGENDIAN
2370 if (r2->fieldoffset) {
2371 r2->fieldoffset += sizeof(uint32_t);
2375 if (state == ARM_CP_STATE_AA64) {
2376 /* To allow abbreviation of ARMCPRegInfo
2377 * definitions, we treat cp == 0 as equivalent to
2378 * the value for "standard guest-visible sysreg".
2381 r2->cp = CP_REG_ARM64_SYSREG_CP;
2383 *key = ENCODE_AA64_CP_REG(r2->cp, r2->crn, crm,
2384 r2->opc0, opc1, opc2);
2386 *key = ENCODE_CP_REG(r2->cp, is64, r2->crn, crm, opc1, opc2);
2389 r2->opaque = opaque;
2391 /* reginfo passed to helpers is correct for the actual access,
2392 * and is never ARM_CP_STATE_BOTH:
2395 /* Make sure reginfo passed to helpers for wildcarded regs
2396 * has the correct crm/opc1/opc2 for this reg, not CP_ANY:
2401 /* By convention, for wildcarded registers only the first
2402 * entry is used for migration; the others are marked as
2403 * NO_MIGRATE so we don't try to transfer the register
2404 * multiple times. Special registers (ie NOP/WFI) are
2407 if ((r->type & ARM_CP_SPECIAL) ||
2408 ((r->crm == CP_ANY) && crm != 0) ||
2409 ((r->opc1 == CP_ANY) && opc1 != 0) ||
2410 ((r->opc2 == CP_ANY) && opc2 != 0)) {
2411 r2->type |= ARM_CP_NO_MIGRATE;
2414 /* Overriding of an existing definition must be explicitly
2417 if (!(r->type & ARM_CP_OVERRIDE)) {
2418 ARMCPRegInfo *oldreg;
2419 oldreg = g_hash_table_lookup(cpu->cp_regs, key);
2420 if (oldreg && !(oldreg->type & ARM_CP_OVERRIDE)) {
2421 fprintf(stderr, "Register redefined: cp=%d %d bit "
2422 "crn=%d crm=%d opc1=%d opc2=%d, "
2423 "was %s, now %s\n", r2->cp, 32 + 32 * is64,
2424 r2->crn, r2->crm, r2->opc1, r2->opc2,
2425 oldreg->name, r2->name);
2426 g_assert_not_reached();
2429 g_hash_table_insert(cpu->cp_regs, key, r2);
2433 void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
2434 const ARMCPRegInfo *r, void *opaque)
2436 /* Define implementations of coprocessor registers.
2437 * We store these in a hashtable because typically
2438 * there are less than 150 registers in a space which
2439 * is 16*16*16*8*8 = 262144 in size.
2440 * Wildcarding is supported for the crm, opc1 and opc2 fields.
2441 * If a register is defined twice then the second definition is
2442 * used, so this can be used to define some generic registers and
2443 * then override them with implementation specific variations.
2444 * At least one of the original and the second definition should
2445 * include ARM_CP_OVERRIDE in its type bits -- this is just a guard
2446 * against accidental use.
2448 * The state field defines whether the register is to be
2449 * visible in the AArch32 or AArch64 execution state. If the
2450 * state is set to ARM_CP_STATE_BOTH then we synthesise a
2451 * reginfo structure for the AArch32 view, which sees the lower
2452 * 32 bits of the 64 bit register.
2454 * Only registers visible in AArch64 may set r->opc0; opc0 cannot
2455 * be wildcarded. AArch64 registers are always considered to be 64
2456 * bits; the ARM_CP_64BIT* flag applies only to the AArch32 view of
2457 * the register, if any.
2459 int crm, opc1, opc2, state;
2460 int crmmin = (r->crm == CP_ANY) ? 0 : r->crm;
2461 int crmmax = (r->crm == CP_ANY) ? 15 : r->crm;
2462 int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1;
2463 int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1;
2464 int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
2465 int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
2466 /* 64 bit registers have only CRm and Opc1 fields */
2467 assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn)));
2468 /* op0 only exists in the AArch64 encodings */
2469 assert((r->state != ARM_CP_STATE_AA32) || (r->opc0 == 0));
2470 /* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless */
2471 assert((r->state != ARM_CP_STATE_AA64) || !(r->type & ARM_CP_64BIT));
2472 /* The AArch64 pseudocode CheckSystemAccess() specifies that op1
2473 * encodes a minimum access level for the register. We roll this
2474 * runtime check into our general permission check code, so check
2475 * here that the reginfo's specified permissions are strict enough
2476 * to encompass the generic architectural permission check.
2478 if (r->state != ARM_CP_STATE_AA32) {
2481 case 0: case 1: case 2:
2494 /* unallocated encoding, so not possible */
2502 /* min_EL EL1, secure mode only (we don't check the latter) */
2506 /* broken reginfo with out-of-range opc1 */
2510 /* assert our permissions are not too lax (stricter is fine) */
2511 assert((r->access & ~mask) == 0);
2514 /* Check that the register definition has enough info to handle
2515 * reads and writes if they are permitted.
2517 if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) {
2518 if (r->access & PL3_R) {
2519 assert(r->fieldoffset || r->readfn);
2521 if (r->access & PL3_W) {
2522 assert(r->fieldoffset || r->writefn);
2525 /* Bad type field probably means missing sentinel at end of reg list */
2526 assert(cptype_valid(r->type));
2527 for (crm = crmmin; crm <= crmmax; crm++) {
2528 for (opc1 = opc1min; opc1 <= opc1max; opc1++) {
2529 for (opc2 = opc2min; opc2 <= opc2max; opc2++) {
2530 for (state = ARM_CP_STATE_AA32;
2531 state <= ARM_CP_STATE_AA64; state++) {
2532 if (r->state != state && r->state != ARM_CP_STATE_BOTH) {
2535 add_cpreg_to_hashtable(cpu, r, opaque, state,
2543 void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
2544 const ARMCPRegInfo *regs, void *opaque)
2546 /* Define a whole list of registers */
2547 const ARMCPRegInfo *r;
2548 for (r = regs; r->type != ARM_CP_SENTINEL; r++) {
2549 define_one_arm_cp_reg_with_opaque(cpu, r, opaque);
2553 const ARMCPRegInfo *get_arm_cp_reginfo(GHashTable *cpregs, uint32_t encoded_cp)
2555 return g_hash_table_lookup(cpregs, &encoded_cp);
2558 void arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri,
2561 /* Helper coprocessor write function for write-ignore registers */
2564 uint64_t arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri)
2566 /* Helper coprocessor write function for read-as-zero registers */
2570 void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *opaque)
2572 /* Helper coprocessor reset function for do-nothing-on-reset registers */
2575 static int bad_mode_switch(CPUARMState *env, int mode)
2577 /* Return true if it is not valid for us to switch to
2578 * this CPU mode (ie all the UNPREDICTABLE cases in
2579 * the ARM ARM CPSRWriteByInstr pseudocode).
2582 case ARM_CPU_MODE_USR:
2583 case ARM_CPU_MODE_SYS:
2584 case ARM_CPU_MODE_SVC:
2585 case ARM_CPU_MODE_ABT:
2586 case ARM_CPU_MODE_UND:
2587 case ARM_CPU_MODE_IRQ:
2588 case ARM_CPU_MODE_FIQ:
2595 uint32_t cpsr_read(CPUARMState *env)
2598 ZF = (env->ZF == 0);
2599 return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) |
2600 (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
2601 | (env->thumb << 5) | ((env->condexec_bits & 3) << 25)
2602 | ((env->condexec_bits & 0xfc) << 8)
2603 | (env->GE << 16) | (env->daif & CPSR_AIF);
2606 void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
2608 if (mask & CPSR_NZCV) {
2609 env->ZF = (~val) & CPSR_Z;
2611 env->CF = (val >> 29) & 1;
2612 env->VF = (val << 3) & 0x80000000;
2615 env->QF = ((val & CPSR_Q) != 0);
2617 env->thumb = ((val & CPSR_T) != 0);
2618 if (mask & CPSR_IT_0_1) {
2619 env->condexec_bits &= ~3;
2620 env->condexec_bits |= (val >> 25) & 3;
2622 if (mask & CPSR_IT_2_7) {
2623 env->condexec_bits &= 3;
2624 env->condexec_bits |= (val >> 8) & 0xfc;
2626 if (mask & CPSR_GE) {
2627 env->GE = (val >> 16) & 0xf;
2630 env->daif &= ~(CPSR_AIF & mask);
2631 env->daif |= val & CPSR_AIF & mask;
2633 if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
2634 if (bad_mode_switch(env, val & CPSR_M)) {
2635 /* Attempt to switch to an invalid mode: this is UNPREDICTABLE.
2636 * We choose to ignore the attempt and leave the CPSR M field
2641 switch_mode(env, val & CPSR_M);
2644 mask &= ~CACHED_CPSR_BITS;
2645 env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask);
2648 /* Sign/zero extend */
2649 uint32_t HELPER(sxtb16)(uint32_t x)
2652 res = (uint16_t)(int8_t)x;
2653 res |= (uint32_t)(int8_t)(x >> 16) << 16;
2657 uint32_t HELPER(uxtb16)(uint32_t x)
2660 res = (uint16_t)(uint8_t)x;
2661 res |= (uint32_t)(uint8_t)(x >> 16) << 16;
2665 uint32_t HELPER(clz)(uint32_t x)
2670 int32_t HELPER(sdiv)(int32_t num, int32_t den)
2674 if (num == INT_MIN && den == -1)
2679 uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
2686 uint32_t HELPER(rbit)(uint32_t x)
2688 x = ((x & 0xff000000) >> 24)
2689 | ((x & 0x00ff0000) >> 8)
2690 | ((x & 0x0000ff00) << 8)
2691 | ((x & 0x000000ff) << 24);
2692 x = ((x & 0xf0f0f0f0) >> 4)
2693 | ((x & 0x0f0f0f0f) << 4);
2694 x = ((x & 0x88888888) >> 3)
2695 | ((x & 0x44444444) >> 1)
2696 | ((x & 0x22222222) << 1)
2697 | ((x & 0x11111111) << 3);
2701 #if defined(CONFIG_USER_ONLY)
2703 void arm_cpu_do_interrupt(CPUState *cs)
2705 cs->exception_index = -1;
2708 int arm_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
2711 ARMCPU *cpu = ARM_CPU(cs);
2712 CPUARMState *env = &cpu->env;
2714 env->exception.vaddress = address;
2716 cs->exception_index = EXCP_PREFETCH_ABORT;
2718 cs->exception_index = EXCP_DATA_ABORT;
2723 /* These should probably raise undefined insn exceptions. */
2724 void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
2726 ARMCPU *cpu = arm_env_get_cpu(env);
2728 cpu_abort(CPU(cpu), "v7m_msr %d\n", reg);
2731 uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
2733 ARMCPU *cpu = arm_env_get_cpu(env);
2735 cpu_abort(CPU(cpu), "v7m_mrs %d\n", reg);
2739 void switch_mode(CPUARMState *env, int mode)
2741 ARMCPU *cpu = arm_env_get_cpu(env);
2743 if (mode != ARM_CPU_MODE_USR) {
2744 cpu_abort(CPU(cpu), "Tried to switch out of user mode\n");
2748 void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
2750 ARMCPU *cpu = arm_env_get_cpu(env);
2752 cpu_abort(CPU(cpu), "banked r13 write\n");
2755 uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
2757 ARMCPU *cpu = arm_env_get_cpu(env);
2759 cpu_abort(CPU(cpu), "banked r13 read\n");
2765 /* Map CPU modes onto saved register banks. */
2766 int bank_number(int mode)
2769 case ARM_CPU_MODE_USR:
2770 case ARM_CPU_MODE_SYS:
2772 case ARM_CPU_MODE_SVC:
2774 case ARM_CPU_MODE_ABT:
2776 case ARM_CPU_MODE_UND:
2778 case ARM_CPU_MODE_IRQ:
2780 case ARM_CPU_MODE_FIQ:
2783 hw_error("bank number requested for bad CPSR mode value 0x%x\n", mode);
2786 void switch_mode(CPUARMState *env, int mode)
2791 old_mode = env->uncached_cpsr & CPSR_M;
2792 if (mode == old_mode)
2795 if (old_mode == ARM_CPU_MODE_FIQ) {
2796 memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t));
2797 memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t));
2798 } else if (mode == ARM_CPU_MODE_FIQ) {
2799 memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t));
2800 memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
2803 i = bank_number(old_mode);
2804 env->banked_r13[i] = env->regs[13];
2805 env->banked_r14[i] = env->regs[14];
2806 env->banked_spsr[i] = env->spsr;
2808 i = bank_number(mode);
2809 env->regs[13] = env->banked_r13[i];
2810 env->regs[14] = env->banked_r14[i];
2811 env->spsr = env->banked_spsr[i];
2814 static void v7m_push(CPUARMState *env, uint32_t val)
2816 CPUState *cs = CPU(arm_env_get_cpu(env));
2819 stl_phys(cs->as, env->regs[13], val);
2822 static uint32_t v7m_pop(CPUARMState *env)
2824 CPUState *cs = CPU(arm_env_get_cpu(env));
2827 val = ldl_phys(cs->as, env->regs[13]);
2832 /* Switch to V7M main or process stack pointer. */
2833 static void switch_v7m_sp(CPUARMState *env, int process)
2836 if (env->v7m.current_sp != process) {
2837 tmp = env->v7m.other_sp;
2838 env->v7m.other_sp = env->regs[13];
2839 env->regs[13] = tmp;
2840 env->v7m.current_sp = process;
2844 static void do_v7m_exception_exit(CPUARMState *env)
2849 type = env->regs[15];
2850 if (env->v7m.exception != 0)
2851 armv7m_nvic_complete_irq(env->nvic, env->v7m.exception);
2853 /* Switch to the target stack. */
2854 switch_v7m_sp(env, (type & 4) != 0);
2855 /* Pop registers. */
2856 env->regs[0] = v7m_pop(env);
2857 env->regs[1] = v7m_pop(env);
2858 env->regs[2] = v7m_pop(env);
2859 env->regs[3] = v7m_pop(env);
2860 env->regs[12] = v7m_pop(env);
2861 env->regs[14] = v7m_pop(env);
2862 env->regs[15] = v7m_pop(env);
2863 xpsr = v7m_pop(env);
2864 xpsr_write(env, xpsr, 0xfffffdff);
2865 /* Undo stack alignment. */
2868 /* ??? The exception return type specifies Thread/Handler mode. However
2869 this is also implied by the xPSR value. Not sure what to do
2870 if there is a mismatch. */
2871 /* ??? Likewise for mismatches between the CONTROL register and the stack
2875 /* Exception names for debug logging; note that not all of these
2876 * precisely correspond to architectural exceptions.
2878 static const char * const excnames[] = {
2879 [EXCP_UDEF] = "Undefined Instruction",
2881 [EXCP_PREFETCH_ABORT] = "Prefetch Abort",
2882 [EXCP_DATA_ABORT] = "Data Abort",
2885 [EXCP_BKPT] = "Breakpoint",
2886 [EXCP_EXCEPTION_EXIT] = "QEMU v7M exception exit",
2887 [EXCP_KERNEL_TRAP] = "QEMU intercept of kernel commpage",
2888 [EXCP_STREX] = "QEMU intercept of STREX",
2891 static inline void arm_log_exception(int idx)
2893 if (qemu_loglevel_mask(CPU_LOG_INT)) {
2894 const char *exc = NULL;
2896 if (idx >= 0 && idx < ARRAY_SIZE(excnames)) {
2897 exc = excnames[idx];
2902 qemu_log_mask(CPU_LOG_INT, "Taking exception %d [%s]\n", idx, exc);
2906 void arm_v7m_cpu_do_interrupt(CPUState *cs)
2908 ARMCPU *cpu = ARM_CPU(cs);
2909 CPUARMState *env = &cpu->env;
2910 uint32_t xpsr = xpsr_read(env);
2914 arm_log_exception(cs->exception_index);
2917 if (env->v7m.current_sp)
2919 if (env->v7m.exception == 0)
2922 /* For exceptions we just mark as pending on the NVIC, and let that
2924 /* TODO: Need to escalate if the current priority is higher than the
2925 one we're raising. */
2926 switch (cs->exception_index) {
2928 armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE);
2931 /* The PC already points to the next instruction. */
2932 armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC);
2934 case EXCP_PREFETCH_ABORT:
2935 case EXCP_DATA_ABORT:
2936 /* TODO: if we implemented the MPU registers, this is where we
2937 * should set the MMFAR, etc from exception.fsr and exception.vaddress.
2939 armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM);
2942 if (semihosting_enabled) {
2944 nr = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
2947 env->regs[0] = do_arm_semihosting(env);
2948 qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
2952 armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG);
2955 env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic);
2957 case EXCP_EXCEPTION_EXIT:
2958 do_v7m_exception_exit(env);
2961 cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
2962 return; /* Never happens. Keep compiler happy. */
2965 /* Align stack pointer. */
2966 /* ??? Should only do this if Configuration Control Register
2967 STACKALIGN bit is set. */
2968 if (env->regs[13] & 4) {
2972 /* Switch to the handler mode. */
2973 v7m_push(env, xpsr);
2974 v7m_push(env, env->regs[15]);
2975 v7m_push(env, env->regs[14]);
2976 v7m_push(env, env->regs[12]);
2977 v7m_push(env, env->regs[3]);
2978 v7m_push(env, env->regs[2]);
2979 v7m_push(env, env->regs[1]);
2980 v7m_push(env, env->regs[0]);
2981 switch_v7m_sp(env, 0);
2983 env->condexec_bits = 0;
2985 addr = ldl_phys(cs->as, env->v7m.vecbase + env->v7m.exception * 4);
2986 env->regs[15] = addr & 0xfffffffe;
2987 env->thumb = addr & 1;
2990 /* Handle a CPU exception. */
2991 void arm_cpu_do_interrupt(CPUState *cs)
2993 ARMCPU *cpu = ARM_CPU(cs);
2994 CPUARMState *env = &cpu->env;
3002 arm_log_exception(cs->exception_index);
3004 /* TODO: Vectored interrupt controller. */
3005 switch (cs->exception_index) {
3007 new_mode = ARM_CPU_MODE_UND;
3016 if (semihosting_enabled) {
3017 /* Check for semihosting interrupt. */
3019 mask = arm_lduw_code(env, env->regs[15] - 2, env->bswap_code)
3022 mask = arm_ldl_code(env, env->regs[15] - 4, env->bswap_code)
3025 /* Only intercept calls from privileged modes, to provide some
3026 semblance of security. */
3027 if (((mask == 0x123456 && !env->thumb)
3028 || (mask == 0xab && env->thumb))
3029 && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
3030 env->regs[0] = do_arm_semihosting(env);
3031 qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
3035 new_mode = ARM_CPU_MODE_SVC;
3038 /* The PC already points to the next instruction. */
3042 /* See if this is a semihosting syscall. */
3043 if (env->thumb && semihosting_enabled) {
3044 mask = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
3046 && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
3048 env->regs[0] = do_arm_semihosting(env);
3049 qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
3053 env->exception.fsr = 2;
3054 /* Fall through to prefetch abort. */
3055 case EXCP_PREFETCH_ABORT:
3056 env->cp15.c5_insn = env->exception.fsr;
3057 env->cp15.c6_insn = env->exception.vaddress;
3058 qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x IFAR 0x%x\n",
3059 env->cp15.c5_insn, env->cp15.c6_insn);
3060 new_mode = ARM_CPU_MODE_ABT;
3062 mask = CPSR_A | CPSR_I;
3065 case EXCP_DATA_ABORT:
3066 env->cp15.c5_data = env->exception.fsr;
3067 env->cp15.c6_data = env->exception.vaddress;
3068 qemu_log_mask(CPU_LOG_INT, "...with DFSR 0x%x DFAR 0x%x\n",
3069 env->cp15.c5_data, env->cp15.c6_data);
3070 new_mode = ARM_CPU_MODE_ABT;
3072 mask = CPSR_A | CPSR_I;
3076 new_mode = ARM_CPU_MODE_IRQ;
3078 /* Disable IRQ and imprecise data aborts. */
3079 mask = CPSR_A | CPSR_I;
3083 new_mode = ARM_CPU_MODE_FIQ;
3085 /* Disable FIQ, IRQ and imprecise data aborts. */
3086 mask = CPSR_A | CPSR_I | CPSR_F;
3090 cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
3091 return; /* Never happens. Keep compiler happy. */
3094 if (env->cp15.c1_sys & SCTLR_V) {
3095 /* when enabled, base address cannot be remapped. */
3098 /* ARM v7 architectures provide a vector base address register to remap
3099 * the interrupt vector table.
3100 * This register is only followed in non-monitor mode, and has a secure
3101 * and un-secure copy. Since the cpu is always in a un-secure operation
3102 * and is never in monitor mode this feature is always active.
3103 * Note: only bits 31:5 are valid.
3105 addr += env->cp15.c12_vbar;
3107 switch_mode (env, new_mode);
3108 env->spsr = cpsr_read(env);
3109 /* Clear IT bits. */
3110 env->condexec_bits = 0;
3111 /* Switch to the new mode, and to the correct instruction set. */
3112 env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
3114 /* this is a lie, as the was no c1_sys on V4T/V5, but who cares
3115 * and we should just guard the thumb mode on V4 */
3116 if (arm_feature(env, ARM_FEATURE_V4T)) {
3117 env->thumb = (env->cp15.c1_sys & SCTLR_TE) != 0;
3119 env->regs[14] = env->regs[15] + offset;
3120 env->regs[15] = addr;
3121 cs->interrupt_request |= CPU_INTERRUPT_EXITTB;
3124 /* Check section/page access permissions.
3125 Returns the page protection flags, or zero if the access is not
3127 static inline int check_ap(CPUARMState *env, int ap, int domain_prot,
3128 int access_type, int is_user)
3132 if (domain_prot == 3) {
3133 return PAGE_READ | PAGE_WRITE;
3136 if (access_type == 1)
3139 prot_ro = PAGE_READ;
3143 if (arm_feature(env, ARM_FEATURE_V7)) {
3146 if (access_type == 1)
3148 switch (env->cp15.c1_sys & (SCTLR_S | SCTLR_R)) {
3150 return is_user ? 0 : PAGE_READ;
3157 return is_user ? 0 : PAGE_READ | PAGE_WRITE;
3162 return PAGE_READ | PAGE_WRITE;
3164 return PAGE_READ | PAGE_WRITE;
3165 case 4: /* Reserved. */
3168 return is_user ? 0 : prot_ro;
3172 if (!arm_feature (env, ARM_FEATURE_V6K))
3180 static uint32_t get_level1_table_address(CPUARMState *env, uint32_t address)
3184 if (address & env->cp15.c2_mask)
3185 table = env->cp15.ttbr1_el1 & 0xffffc000;
3187 table = env->cp15.ttbr0_el1 & env->cp15.c2_base_mask;
3189 table |= (address >> 18) & 0x3ffc;
3193 static int get_phys_addr_v5(CPUARMState *env, uint32_t address, int access_type,
3194 int is_user, hwaddr *phys_ptr,
3195 int *prot, target_ulong *page_size)
3197 CPUState *cs = CPU(arm_env_get_cpu(env));
3207 /* Pagetable walk. */
3208 /* Lookup l1 descriptor. */
3209 table = get_level1_table_address(env, address);
3210 desc = ldl_phys(cs->as, table);
3212 domain = (desc >> 5) & 0x0f;
3213 domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
3215 /* Section translation fault. */
3219 if (domain_prot == 0 || domain_prot == 2) {
3221 code = 9; /* Section domain fault. */
3223 code = 11; /* Page domain fault. */
3228 phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
3229 ap = (desc >> 10) & 3;
3231 *page_size = 1024 * 1024;
3233 /* Lookup l2 entry. */
3235 /* Coarse pagetable. */
3236 table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
3238 /* Fine pagetable. */
3239 table = (desc & 0xfffff000) | ((address >> 8) & 0xffc);
3241 desc = ldl_phys(cs->as, table);
3243 case 0: /* Page translation fault. */
3246 case 1: /* 64k page. */
3247 phys_addr = (desc & 0xffff0000) | (address & 0xffff);
3248 ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
3249 *page_size = 0x10000;
3251 case 2: /* 4k page. */
3252 phys_addr = (desc & 0xfffff000) | (address & 0xfff);
3253 ap = (desc >> (4 + ((address >> 9) & 6))) & 3;
3254 *page_size = 0x1000;
3256 case 3: /* 1k page. */
3258 if (arm_feature(env, ARM_FEATURE_XSCALE)) {
3259 phys_addr = (desc & 0xfffff000) | (address & 0xfff);
3261 /* Page translation fault. */
3266 phys_addr = (desc & 0xfffffc00) | (address & 0x3ff);
3268 ap = (desc >> 4) & 3;
3272 /* Never happens, but compiler isn't smart enough to tell. */
3277 *prot = check_ap(env, ap, domain_prot, access_type, is_user);
3279 /* Access permission fault. */
3283 *phys_ptr = phys_addr;
3286 return code | (domain << 4);
3289 static int get_phys_addr_v6(CPUARMState *env, uint32_t address, int access_type,
3290 int is_user, hwaddr *phys_ptr,
3291 int *prot, target_ulong *page_size)
3293 CPUState *cs = CPU(arm_env_get_cpu(env));
3305 /* Pagetable walk. */
3306 /* Lookup l1 descriptor. */
3307 table = get_level1_table_address(env, address);
3308 desc = ldl_phys(cs->as, table);
3310 if (type == 0 || (type == 3 && !arm_feature(env, ARM_FEATURE_PXN))) {
3311 /* Section translation fault, or attempt to use the encoding
3312 * which is Reserved on implementations without PXN.
3317 if ((type == 1) || !(desc & (1 << 18))) {
3318 /* Page or Section. */
3319 domain = (desc >> 5) & 0x0f;
3321 domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
3322 if (domain_prot == 0 || domain_prot == 2) {
3324 code = 9; /* Section domain fault. */
3326 code = 11; /* Page domain fault. */
3331 if (desc & (1 << 18)) {
3333 phys_addr = (desc & 0xff000000) | (address & 0x00ffffff);
3334 *page_size = 0x1000000;
3337 phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
3338 *page_size = 0x100000;
3340 ap = ((desc >> 10) & 3) | ((desc >> 13) & 4);
3341 xn = desc & (1 << 4);
3345 if (arm_feature(env, ARM_FEATURE_PXN)) {
3346 pxn = (desc >> 2) & 1;
3348 /* Lookup l2 entry. */
3349 table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
3350 desc = ldl_phys(cs->as, table);
3351 ap = ((desc >> 4) & 3) | ((desc >> 7) & 4);
3353 case 0: /* Page translation fault. */
3356 case 1: /* 64k page. */
3357 phys_addr = (desc & 0xffff0000) | (address & 0xffff);
3358 xn = desc & (1 << 15);
3359 *page_size = 0x10000;
3361 case 2: case 3: /* 4k page. */
3362 phys_addr = (desc & 0xfffff000) | (address & 0xfff);
3364 *page_size = 0x1000;
3367 /* Never happens, but compiler isn't smart enough to tell. */
3372 if (domain_prot == 3) {
3373 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
3375 if (pxn && !is_user) {
3378 if (xn && access_type == 2)
3381 /* The simplified model uses AP[0] as an access control bit. */
3382 if ((env->cp15.c1_sys & SCTLR_AFE) && (ap & 1) == 0) {
3383 /* Access flag fault. */
3384 code = (code == 15) ? 6 : 3;
3387 *prot = check_ap(env, ap, domain_prot, access_type, is_user);
3389 /* Access permission fault. */
3396 *phys_ptr = phys_addr;
3399 return code | (domain << 4);
3402 /* Fault type for long-descriptor MMU fault reporting; this corresponds
3403 * to bits [5..2] in the STATUS field in long-format DFSR/IFSR.
3406 translation_fault = 1,
3408 permission_fault = 3,
3411 static int get_phys_addr_lpae(CPUARMState *env, target_ulong address,
3412 int access_type, int is_user,
3413 hwaddr *phys_ptr, int *prot,
3414 target_ulong *page_size_ptr)
3416 CPUState *cs = CPU(arm_env_get_cpu(env));
3417 /* Read an LPAE long-descriptor translation table. */
3418 MMUFaultType fault_type = translation_fault;
3425 hwaddr descaddr, descmask;
3426 uint32_t tableattrs;
3427 target_ulong page_size;
3429 int32_t granule_sz = 9;
3430 int32_t va_size = 32;
3433 if (arm_el_is_aa64(env, 1)) {
3435 if (extract64(address, 55, 1))
3436 tbi = extract64(env->cp15.c2_control, 38, 1);
3438 tbi = extract64(env->cp15.c2_control, 37, 1);
3442 /* Determine whether this address is in the region controlled by
3443 * TTBR0 or TTBR1 (or if it is in neither region and should fault).
3444 * This is a Non-secure PL0/1 stage 1 translation, so controlled by
3445 * TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
3447 uint32_t t0sz = extract32(env->cp15.c2_control, 0, 6);
3448 if (arm_el_is_aa64(env, 1)) {
3449 t0sz = MIN(t0sz, 39);
3450 t0sz = MAX(t0sz, 16);
3452 uint32_t t1sz = extract32(env->cp15.c2_control, 16, 6);
3453 if (arm_el_is_aa64(env, 1)) {
3454 t1sz = MIN(t1sz, 39);
3455 t1sz = MAX(t1sz, 16);
3457 if (t0sz && !extract64(address, va_size - t0sz, t0sz - tbi)) {
3458 /* there is a ttbr0 region and we are in it (high bits all zero) */
3460 } else if (t1sz && !extract64(~address, va_size - t1sz, t1sz - tbi)) {
3461 /* there is a ttbr1 region and we are in it (high bits all one) */
3464 /* ttbr0 region is "everything not in the ttbr1 region" */
3467 /* ttbr1 region is "everything not in the ttbr0 region" */
3470 /* in the gap between the two regions, this is a Translation fault */
3471 fault_type = translation_fault;
3475 /* Note that QEMU ignores shareability and cacheability attributes,
3476 * so we don't need to do anything with the SH, ORGN, IRGN fields
3477 * in the TTBCR. Similarly, TTBCR:A1 selects whether we get the
3478 * ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
3479 * implement any ASID-like capability so we can ignore it (instead
3480 * we will always flush the TLB any time the ASID is changed).
3482 if (ttbr_select == 0) {
3483 ttbr = env->cp15.ttbr0_el1;
3484 epd = extract32(env->cp15.c2_control, 7, 1);
3487 tg = extract32(env->cp15.c2_control, 14, 2);
3488 if (tg == 1) { /* 64KB pages */
3491 if (tg == 2) { /* 16KB pages */
3495 ttbr = env->cp15.ttbr1_el1;
3496 epd = extract32(env->cp15.c2_control, 23, 1);
3499 tg = extract32(env->cp15.c2_control, 30, 2);
3500 if (tg == 3) { /* 64KB pages */
3503 if (tg == 1) { /* 16KB pages */
3509 /* Translation table walk disabled => Translation fault on TLB miss */
3513 /* The starting level depends on the virtual address size which can be
3514 * up to 48-bits and the translation granule size.
3516 if ((va_size - tsz) > (granule_sz * 4 + 3)) {
3518 } else if ((va_size - tsz) > (granule_sz * 3 + 3)) {
3524 /* Clear the vaddr bits which aren't part of the within-region address,
3525 * so that we don't have to special case things when calculating the
3526 * first descriptor address.
3529 address &= (1ULL << (va_size - tsz)) - 1;
3532 descmask = (1ULL << (granule_sz + 3)) - 1;
3534 /* Now we can extract the actual base address from the TTBR */
3535 descaddr = extract64(ttbr, 0, 48);
3536 descaddr &= ~((1ULL << (va_size - tsz - (granule_sz * (4 - level)))) - 1);
3540 uint64_t descriptor;
3542 descaddr |= (address >> (granule_sz * (4 - level))) & descmask;
3544 descriptor = ldq_phys(cs->as, descaddr);
3545 if (!(descriptor & 1) ||
3546 (!(descriptor & 2) && (level == 3))) {
3547 /* Invalid, or the Reserved level 3 encoding */
3550 descaddr = descriptor & 0xfffffff000ULL;
3552 if ((descriptor & 2) && (level < 3)) {
3553 /* Table entry. The top five bits are attributes which may
3554 * propagate down through lower levels of the table (and
3555 * which are all arranged so that 0 means "no effect", so
3556 * we can gather them up by ORing in the bits at each level).
3558 tableattrs |= extract64(descriptor, 59, 5);
3562 /* Block entry at level 1 or 2, or page entry at level 3.
3563 * These are basically the same thing, although the number
3564 * of bits we pull in from the vaddr varies.
3566 page_size = (1 << ((granule_sz * (4 - level)) + 3));
3567 descaddr |= (address & (page_size - 1));
3568 /* Extract attributes from the descriptor and merge with table attrs */
3569 if (arm_feature(env, ARM_FEATURE_V8)) {
3570 attrs = extract64(descriptor, 2, 10)
3571 | (extract64(descriptor, 53, 11) << 10);
3573 attrs = extract64(descriptor, 2, 10)
3574 | (extract64(descriptor, 52, 12) << 10);
3576 attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */
3577 attrs |= extract32(tableattrs, 3, 1) << 5; /* APTable[1] => AP[2] */
3578 /* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
3579 * means "force PL1 access only", which means forcing AP[1] to 0.
3581 if (extract32(tableattrs, 2, 1)) {
3584 /* Since we're always in the Non-secure state, NSTable is ignored. */
3587 /* Here descaddr is the final physical address, and attributes
3590 fault_type = access_fault;
3591 if ((attrs & (1 << 8)) == 0) {
3595 fault_type = permission_fault;
3596 if (is_user && !(attrs & (1 << 4))) {
3597 /* Unprivileged access not enabled */
3600 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
3601 if (attrs & (1 << 12) || (!is_user && (attrs & (1 << 11)))) {
3603 if (access_type == 2) {
3606 *prot &= ~PAGE_EXEC;
3608 if (attrs & (1 << 5)) {
3609 /* Write access forbidden */
3610 if (access_type == 1) {
3613 *prot &= ~PAGE_WRITE;
3616 *phys_ptr = descaddr;
3617 *page_size_ptr = page_size;
3621 /* Long-descriptor format IFSR/DFSR value */
3622 return (1 << 9) | (fault_type << 2) | level;
3625 static int get_phys_addr_mpu(CPUARMState *env, uint32_t address,
3626 int access_type, int is_user,
3627 hwaddr *phys_ptr, int *prot)
3633 *phys_ptr = address;
3634 for (n = 7; n >= 0; n--) {
3635 base = env->cp15.c6_region[n];
3636 if ((base & 1) == 0)
3638 mask = 1 << ((base >> 1) & 0x1f);
3639 /* Keep this shift separate from the above to avoid an
3640 (undefined) << 32. */
3641 mask = (mask << 1) - 1;
3642 if (((base ^ address) & ~mask) == 0)
3648 if (access_type == 2) {
3649 mask = env->cp15.c5_insn;
3651 mask = env->cp15.c5_data;
3653 mask = (mask >> (n * 4)) & 0xf;
3660 *prot = PAGE_READ | PAGE_WRITE;
3665 *prot |= PAGE_WRITE;
3668 *prot = PAGE_READ | PAGE_WRITE;
3679 /* Bad permission. */
3686 /* get_phys_addr - get the physical address for this virtual address
3688 * Find the physical address corresponding to the given virtual address,
3689 * by doing a translation table walk on MMU based systems or using the
3690 * MPU state on MPU based systems.
3692 * Returns 0 if the translation was successful. Otherwise, phys_ptr,
3693 * prot and page_size are not filled in, and the return value provides
3694 * information on why the translation aborted, in the format of a
3695 * DFSR/IFSR fault register, with the following caveats:
3696 * * we honour the short vs long DFSR format differences.
3697 * * the WnR bit is never set (the caller must do this).
3698 * * for MPU based systems we don't bother to return a full FSR format
3702 * @address: virtual address to get physical address for
3703 * @access_type: 0 for read, 1 for write, 2 for execute
3704 * @is_user: 0 for privileged access, 1 for user
3705 * @phys_ptr: set to the physical address corresponding to the virtual address
3706 * @prot: set to the permissions for the page containing phys_ptr
3707 * @page_size: set to the size of the page containing phys_ptr
3709 static inline int get_phys_addr(CPUARMState *env, target_ulong address,
3710 int access_type, int is_user,
3711 hwaddr *phys_ptr, int *prot,
3712 target_ulong *page_size)
3714 /* Fast Context Switch Extension. */
3715 if (address < 0x02000000)
3716 address += env->cp15.c13_fcse;
3718 if ((env->cp15.c1_sys & SCTLR_M) == 0) {
3719 /* MMU/MPU disabled. */
3720 *phys_ptr = address;
3721 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
3722 *page_size = TARGET_PAGE_SIZE;
3724 } else if (arm_feature(env, ARM_FEATURE_MPU)) {
3725 *page_size = TARGET_PAGE_SIZE;
3726 return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
3728 } else if (extended_addresses_enabled(env)) {
3729 return get_phys_addr_lpae(env, address, access_type, is_user, phys_ptr,
3731 } else if (env->cp15.c1_sys & SCTLR_XP) {
3732 return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
3735 return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
3740 int arm_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
3741 int access_type, int mmu_idx)
3743 ARMCPU *cpu = ARM_CPU(cs);
3744 CPUARMState *env = &cpu->env;
3746 target_ulong page_size;
3750 bool same_el = (arm_current_pl(env) != 0);
3752 is_user = mmu_idx == MMU_USER_IDX;
3753 ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot,
3756 /* Map a single [sub]page. */
3757 phys_addr &= ~(hwaddr)0x3ff;
3758 address &= ~(target_ulong)0x3ff;
3759 tlb_set_page(cs, address, phys_addr, prot, mmu_idx, page_size);
3763 /* AArch64 syndrome does not have an LPAE bit */
3764 syn = ret & ~(1 << 9);
3766 /* For insn and data aborts we assume there is no instruction syndrome
3767 * information; this is always true for exceptions reported to EL1.
3769 if (access_type == 2) {
3770 syn = syn_insn_abort(same_el, 0, 0, syn);
3771 cs->exception_index = EXCP_PREFETCH_ABORT;
3773 syn = syn_data_abort(same_el, 0, 0, 0, access_type == 1, syn);
3774 if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) {
3777 cs->exception_index = EXCP_DATA_ABORT;
3780 env->exception.syndrome = syn;
3781 env->exception.vaddress = address;
3782 env->exception.fsr = ret;
3786 hwaddr arm_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
3788 ARMCPU *cpu = ARM_CPU(cs);
3790 target_ulong page_size;
3794 ret = get_phys_addr(&cpu->env, addr, 0, 0, &phys_addr, &prot, &page_size);
3803 void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
3805 if ((env->uncached_cpsr & CPSR_M) == mode) {
3806 env->regs[13] = val;
3808 env->banked_r13[bank_number(mode)] = val;
3812 uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
3814 if ((env->uncached_cpsr & CPSR_M) == mode) {
3815 return env->regs[13];
3817 return env->banked_r13[bank_number(mode)];
3821 uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
3823 ARMCPU *cpu = arm_env_get_cpu(env);
3827 return xpsr_read(env) & 0xf8000000;
3829 return xpsr_read(env) & 0xf80001ff;
3831 return xpsr_read(env) & 0xff00fc00;
3833 return xpsr_read(env) & 0xff00fdff;
3835 return xpsr_read(env) & 0x000001ff;
3837 return xpsr_read(env) & 0x0700fc00;
3839 return xpsr_read(env) & 0x0700edff;
3841 return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13];
3843 return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp;
3844 case 16: /* PRIMASK */
3845 return (env->daif & PSTATE_I) != 0;
3846 case 17: /* BASEPRI */
3847 case 18: /* BASEPRI_MAX */
3848 return env->v7m.basepri;
3849 case 19: /* FAULTMASK */
3850 return (env->daif & PSTATE_F) != 0;
3851 case 20: /* CONTROL */
3852 return env->v7m.control;
3854 /* ??? For debugging only. */
3855 cpu_abort(CPU(cpu), "Unimplemented system register read (%d)\n", reg);
3860 void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
3862 ARMCPU *cpu = arm_env_get_cpu(env);
3866 xpsr_write(env, val, 0xf8000000);
3869 xpsr_write(env, val, 0xf8000000);
3872 xpsr_write(env, val, 0xfe00fc00);
3875 xpsr_write(env, val, 0xfe00fc00);
3878 /* IPSR bits are readonly. */
3881 xpsr_write(env, val, 0x0600fc00);
3884 xpsr_write(env, val, 0x0600fc00);
3887 if (env->v7m.current_sp)
3888 env->v7m.other_sp = val;
3890 env->regs[13] = val;
3893 if (env->v7m.current_sp)
3894 env->regs[13] = val;
3896 env->v7m.other_sp = val;
3898 case 16: /* PRIMASK */
3900 env->daif |= PSTATE_I;
3902 env->daif &= ~PSTATE_I;
3905 case 17: /* BASEPRI */
3906 env->v7m.basepri = val & 0xff;
3908 case 18: /* BASEPRI_MAX */
3910 if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0))
3911 env->v7m.basepri = val;
3913 case 19: /* FAULTMASK */
3915 env->daif |= PSTATE_F;
3917 env->daif &= ~PSTATE_F;
3920 case 20: /* CONTROL */
3921 env->v7m.control = val & 3;
3922 switch_v7m_sp(env, (val & 2) != 0);
3925 /* ??? For debugging only. */
3926 cpu_abort(CPU(cpu), "Unimplemented system register write (%d)\n", reg);
3933 /* Note that signed overflow is undefined in C. The following routines are
3934 careful to use unsigned types where modulo arithmetic is required.
3935 Failure to do so _will_ break on newer gcc. */
3937 /* Signed saturating arithmetic. */
3939 /* Perform 16-bit signed saturating addition. */
3940 static inline uint16_t add16_sat(uint16_t a, uint16_t b)
3945 if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) {
3954 /* Perform 8-bit signed saturating addition. */
3955 static inline uint8_t add8_sat(uint8_t a, uint8_t b)
3960 if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) {
3969 /* Perform 16-bit signed saturating subtraction. */
3970 static inline uint16_t sub16_sat(uint16_t a, uint16_t b)
3975 if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) {
3984 /* Perform 8-bit signed saturating subtraction. */
3985 static inline uint8_t sub8_sat(uint8_t a, uint8_t b)
3990 if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) {
3999 #define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
4000 #define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
4001 #define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
4002 #define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
4005 #include "op_addsub.h"
4007 /* Unsigned saturating arithmetic. */
4008 static inline uint16_t add16_usat(uint16_t a, uint16_t b)
4017 static inline uint16_t sub16_usat(uint16_t a, uint16_t b)
4025 static inline uint8_t add8_usat(uint8_t a, uint8_t b)
4034 static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
4042 #define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
4043 #define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
4044 #define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
4045 #define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
4048 #include "op_addsub.h"
4050 /* Signed modulo arithmetic. */
4051 #define SARITH16(a, b, n, op) do { \
4053 sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
4054 RESULT(sum, n, 16); \
4056 ge |= 3 << (n * 2); \
4059 #define SARITH8(a, b, n, op) do { \
4061 sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
4062 RESULT(sum, n, 8); \
4068 #define ADD16(a, b, n) SARITH16(a, b, n, +)
4069 #define SUB16(a, b, n) SARITH16(a, b, n, -)
4070 #define ADD8(a, b, n) SARITH8(a, b, n, +)
4071 #define SUB8(a, b, n) SARITH8(a, b, n, -)
4075 #include "op_addsub.h"
4077 /* Unsigned modulo arithmetic. */
4078 #define ADD16(a, b, n) do { \
4080 sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
4081 RESULT(sum, n, 16); \
4082 if ((sum >> 16) == 1) \
4083 ge |= 3 << (n * 2); \
4086 #define ADD8(a, b, n) do { \
4088 sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
4089 RESULT(sum, n, 8); \
4090 if ((sum >> 8) == 1) \
4094 #define SUB16(a, b, n) do { \
4096 sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
4097 RESULT(sum, n, 16); \
4098 if ((sum >> 16) == 0) \
4099 ge |= 3 << (n * 2); \
4102 #define SUB8(a, b, n) do { \
4104 sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
4105 RESULT(sum, n, 8); \
4106 if ((sum >> 8) == 0) \
4113 #include "op_addsub.h"
4115 /* Halved signed arithmetic. */
4116 #define ADD16(a, b, n) \
4117 RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
4118 #define SUB16(a, b, n) \
4119 RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
4120 #define ADD8(a, b, n) \
4121 RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
4122 #define SUB8(a, b, n) \
4123 RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
4126 #include "op_addsub.h"
4128 /* Halved unsigned arithmetic. */
4129 #define ADD16(a, b, n) \
4130 RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
4131 #define SUB16(a, b, n) \
4132 RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
4133 #define ADD8(a, b, n) \
4134 RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
4135 #define SUB8(a, b, n) \
4136 RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
4139 #include "op_addsub.h"
4141 static inline uint8_t do_usad(uint8_t a, uint8_t b)
4149 /* Unsigned sum of absolute byte differences. */
4150 uint32_t HELPER(usad8)(uint32_t a, uint32_t b)
4153 sum = do_usad(a, b);
4154 sum += do_usad(a >> 8, b >> 8);
4155 sum += do_usad(a >> 16, b >>16);
4156 sum += do_usad(a >> 24, b >> 24);
4160 /* For ARMv6 SEL instruction. */
4161 uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b)
4174 return (a & mask) | (b & ~mask);
4177 /* VFP support. We follow the convention used for VFP instructions:
4178 Single precision routines have a "s" suffix, double precision a
4181 /* Convert host exception flags to vfp form. */
4182 static inline int vfp_exceptbits_from_host(int host_bits)
4184 int target_bits = 0;
4186 if (host_bits & float_flag_invalid)
4188 if (host_bits & float_flag_divbyzero)
4190 if (host_bits & float_flag_overflow)
4192 if (host_bits & (float_flag_underflow | float_flag_output_denormal))
4194 if (host_bits & float_flag_inexact)
4195 target_bits |= 0x10;
4196 if (host_bits & float_flag_input_denormal)
4197 target_bits |= 0x80;
4201 uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env)
4206 fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
4207 | (env->vfp.vec_len << 16)
4208 | (env->vfp.vec_stride << 20);
4209 i = get_float_exception_flags(&env->vfp.fp_status);
4210 i |= get_float_exception_flags(&env->vfp.standard_fp_status);
4211 fpscr |= vfp_exceptbits_from_host(i);
4215 uint32_t vfp_get_fpscr(CPUARMState *env)
4217 return HELPER(vfp_get_fpscr)(env);
4220 /* Convert vfp exception flags to target form. */
4221 static inline int vfp_exceptbits_to_host(int target_bits)
4225 if (target_bits & 1)
4226 host_bits |= float_flag_invalid;
4227 if (target_bits & 2)
4228 host_bits |= float_flag_divbyzero;
4229 if (target_bits & 4)
4230 host_bits |= float_flag_overflow;
4231 if (target_bits & 8)
4232 host_bits |= float_flag_underflow;
4233 if (target_bits & 0x10)
4234 host_bits |= float_flag_inexact;
4235 if (target_bits & 0x80)
4236 host_bits |= float_flag_input_denormal;
4240 void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
4245 changed = env->vfp.xregs[ARM_VFP_FPSCR];
4246 env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
4247 env->vfp.vec_len = (val >> 16) & 7;
4248 env->vfp.vec_stride = (val >> 20) & 3;
4251 if (changed & (3 << 22)) {
4252 i = (val >> 22) & 3;
4254 case FPROUNDING_TIEEVEN:
4255 i = float_round_nearest_even;
4257 case FPROUNDING_POSINF:
4260 case FPROUNDING_NEGINF:
4261 i = float_round_down;
4263 case FPROUNDING_ZERO:
4264 i = float_round_to_zero;
4267 set_float_rounding_mode(i, &env->vfp.fp_status);
4269 if (changed & (1 << 24)) {
4270 set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
4271 set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
4273 if (changed & (1 << 25))
4274 set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status);
4276 i = vfp_exceptbits_to_host(val);
4277 set_float_exception_flags(i, &env->vfp.fp_status);
4278 set_float_exception_flags(0, &env->vfp.standard_fp_status);
4281 void vfp_set_fpscr(CPUARMState *env, uint32_t val)
4283 HELPER(vfp_set_fpscr)(env, val);
4286 #define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
4288 #define VFP_BINOP(name) \
4289 float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
4291 float_status *fpst = fpstp; \
4292 return float32_ ## name(a, b, fpst); \
4294 float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
4296 float_status *fpst = fpstp; \
4297 return float64_ ## name(a, b, fpst); \
4309 float32 VFP_HELPER(neg, s)(float32 a)
4311 return float32_chs(a);
4314 float64 VFP_HELPER(neg, d)(float64 a)
4316 return float64_chs(a);
4319 float32 VFP_HELPER(abs, s)(float32 a)
4321 return float32_abs(a);
4324 float64 VFP_HELPER(abs, d)(float64 a)
4326 return float64_abs(a);
4329 float32 VFP_HELPER(sqrt, s)(float32 a, CPUARMState *env)
4331 return float32_sqrt(a, &env->vfp.fp_status);
4334 float64 VFP_HELPER(sqrt, d)(float64 a, CPUARMState *env)
4336 return float64_sqrt(a, &env->vfp.fp_status);
4339 /* XXX: check quiet/signaling case */
4340 #define DO_VFP_cmp(p, type) \
4341 void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \
4344 switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
4345 case 0: flags = 0x6; break; \
4346 case -1: flags = 0x8; break; \
4347 case 1: flags = 0x2; break; \
4348 default: case 2: flags = 0x3; break; \
4350 env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
4351 | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
4353 void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
4356 switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
4357 case 0: flags = 0x6; break; \
4358 case -1: flags = 0x8; break; \
4359 case 1: flags = 0x2; break; \
4360 default: case 2: flags = 0x3; break; \
4362 env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
4363 | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
4365 DO_VFP_cmp(s, float32)
4366 DO_VFP_cmp(d, float64)
4369 /* Integer to float and float to integer conversions */
4371 #define CONV_ITOF(name, fsz, sign) \
4372 float##fsz HELPER(name)(uint32_t x, void *fpstp) \
4374 float_status *fpst = fpstp; \
4375 return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \
4378 #define CONV_FTOI(name, fsz, sign, round) \
4379 uint32_t HELPER(name)(float##fsz x, void *fpstp) \
4381 float_status *fpst = fpstp; \
4382 if (float##fsz##_is_any_nan(x)) { \
4383 float_raise(float_flag_invalid, fpst); \
4386 return float##fsz##_to_##sign##int32##round(x, fpst); \
4389 #define FLOAT_CONVS(name, p, fsz, sign) \
4390 CONV_ITOF(vfp_##name##to##p, fsz, sign) \
4391 CONV_FTOI(vfp_to##name##p, fsz, sign, ) \
4392 CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero)
4394 FLOAT_CONVS(si, s, 32, )
4395 FLOAT_CONVS(si, d, 64, )
4396 FLOAT_CONVS(ui, s, 32, u)
4397 FLOAT_CONVS(ui, d, 64, u)
4403 /* floating point conversion */
4404 float64 VFP_HELPER(fcvtd, s)(float32 x, CPUARMState *env)
4406 float64 r = float32_to_float64(x, &env->vfp.fp_status);
4407 /* ARM requires that S<->D conversion of any kind of NaN generates
4408 * a quiet NaN by forcing the most significant frac bit to 1.
4410 return float64_maybe_silence_nan(r);
4413 float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env)
4415 float32 r = float64_to_float32(x, &env->vfp.fp_status);
4416 /* ARM requires that S<->D conversion of any kind of NaN generates
4417 * a quiet NaN by forcing the most significant frac bit to 1.
4419 return float32_maybe_silence_nan(r);
4422 /* VFP3 fixed point conversion. */
4423 #define VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
4424 float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t x, uint32_t shift, \
4427 float_status *fpst = fpstp; \
4429 tmp = itype##_to_##float##fsz(x, fpst); \
4430 return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
4433 /* Notice that we want only input-denormal exception flags from the
4434 * scalbn operation: the other possible flags (overflow+inexact if
4435 * we overflow to infinity, output-denormal) aren't correct for the
4436 * complete scale-and-convert operation.
4438 #define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, round) \
4439 uint##isz##_t HELPER(vfp_to##name##p##round)(float##fsz x, \
4443 float_status *fpst = fpstp; \
4444 int old_exc_flags = get_float_exception_flags(fpst); \
4446 if (float##fsz##_is_any_nan(x)) { \
4447 float_raise(float_flag_invalid, fpst); \
4450 tmp = float##fsz##_scalbn(x, shift, fpst); \
4451 old_exc_flags |= get_float_exception_flags(fpst) \
4452 & float_flag_input_denormal; \
4453 set_float_exception_flags(old_exc_flags, fpst); \
4454 return float##fsz##_to_##itype##round(tmp, fpst); \
4457 #define VFP_CONV_FIX(name, p, fsz, isz, itype) \
4458 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
4459 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, _round_to_zero) \
4460 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
4462 #define VFP_CONV_FIX_A64(name, p, fsz, isz, itype) \
4463 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
4464 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
4466 VFP_CONV_FIX(sh, d, 64, 64, int16)
4467 VFP_CONV_FIX(sl, d, 64, 64, int32)
4468 VFP_CONV_FIX_A64(sq, d, 64, 64, int64)
4469 VFP_CONV_FIX(uh, d, 64, 64, uint16)
4470 VFP_CONV_FIX(ul, d, 64, 64, uint32)
4471 VFP_CONV_FIX_A64(uq, d, 64, 64, uint64)
4472 VFP_CONV_FIX(sh, s, 32, 32, int16)
4473 VFP_CONV_FIX(sl, s, 32, 32, int32)
4474 VFP_CONV_FIX_A64(sq, s, 32, 64, int64)
4475 VFP_CONV_FIX(uh, s, 32, 32, uint16)
4476 VFP_CONV_FIX(ul, s, 32, 32, uint32)
4477 VFP_CONV_FIX_A64(uq, s, 32, 64, uint64)
4479 #undef VFP_CONV_FIX_FLOAT
4480 #undef VFP_CONV_FLOAT_FIX_ROUND
4482 /* Set the current fp rounding mode and return the old one.
4483 * The argument is a softfloat float_round_ value.
4485 uint32_t HELPER(set_rmode)(uint32_t rmode, CPUARMState *env)
4487 float_status *fp_status = &env->vfp.fp_status;
4489 uint32_t prev_rmode = get_float_rounding_mode(fp_status);
4490 set_float_rounding_mode(rmode, fp_status);
4495 /* Set the current fp rounding mode in the standard fp status and return
4496 * the old one. This is for NEON instructions that need to change the
4497 * rounding mode but wish to use the standard FPSCR values for everything
4498 * else. Always set the rounding mode back to the correct value after
4500 * The argument is a softfloat float_round_ value.
4502 uint32_t HELPER(set_neon_rmode)(uint32_t rmode, CPUARMState *env)
4504 float_status *fp_status = &env->vfp.standard_fp_status;
4506 uint32_t prev_rmode = get_float_rounding_mode(fp_status);
4507 set_float_rounding_mode(rmode, fp_status);
4512 /* Half precision conversions. */
4513 static float32 do_fcvt_f16_to_f32(uint32_t a, CPUARMState *env, float_status *s)
4515 int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
4516 float32 r = float16_to_float32(make_float16(a), ieee, s);
4518 return float32_maybe_silence_nan(r);
4523 static uint32_t do_fcvt_f32_to_f16(float32 a, CPUARMState *env, float_status *s)
4525 int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
4526 float16 r = float32_to_float16(a, ieee, s);
4528 r = float16_maybe_silence_nan(r);
4530 return float16_val(r);
4533 float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env)
4535 return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status);
4538 uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUARMState *env)
4540 return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status);
4543 float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env)
4545 return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status);
4548 uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUARMState *env)
4550 return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status);
4553 float64 HELPER(vfp_fcvt_f16_to_f64)(uint32_t a, CPUARMState *env)
4555 int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
4556 float64 r = float16_to_float64(make_float16(a), ieee, &env->vfp.fp_status);
4558 return float64_maybe_silence_nan(r);
4563 uint32_t HELPER(vfp_fcvt_f64_to_f16)(float64 a, CPUARMState *env)
4565 int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
4566 float16 r = float64_to_float16(a, ieee, &env->vfp.fp_status);
4568 r = float16_maybe_silence_nan(r);
4570 return float16_val(r);
4573 #define float32_two make_float32(0x40000000)
4574 #define float32_three make_float32(0x40400000)
4575 #define float32_one_point_five make_float32(0x3fc00000)
4577 float32 HELPER(recps_f32)(float32 a, float32 b, CPUARMState *env)
4579 float_status *s = &env->vfp.standard_fp_status;
4580 if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
4581 (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
4582 if (!(float32_is_zero(a) || float32_is_zero(b))) {
4583 float_raise(float_flag_input_denormal, s);
4587 return float32_sub(float32_two, float32_mul(a, b, s), s);
4590 float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env)
4592 float_status *s = &env->vfp.standard_fp_status;
4594 if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
4595 (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
4596 if (!(float32_is_zero(a) || float32_is_zero(b))) {
4597 float_raise(float_flag_input_denormal, s);
4599 return float32_one_point_five;
4601 product = float32_mul(a, b, s);
4602 return float32_div(float32_sub(float32_three, product, s), float32_two, s);
4607 /* Constants 256 and 512 are used in some helpers; we avoid relying on
4608 * int->float conversions at run-time. */
4609 #define float64_256 make_float64(0x4070000000000000LL)
4610 #define float64_512 make_float64(0x4080000000000000LL)
4611 #define float32_maxnorm make_float32(0x7f7fffff)
4612 #define float64_maxnorm make_float64(0x7fefffffffffffffLL)
4614 /* Reciprocal functions
4616 * The algorithm that must be used to calculate the estimate
4617 * is specified by the ARM ARM, see FPRecipEstimate()
4620 static float64 recip_estimate(float64 a, float_status *real_fp_status)
4622 /* These calculations mustn't set any fp exception flags,
4623 * so we use a local copy of the fp_status.
4625 float_status dummy_status = *real_fp_status;
4626 float_status *s = &dummy_status;
4627 /* q = (int)(a * 512.0) */
4628 float64 q = float64_mul(float64_512, a, s);
4629 int64_t q_int = float64_to_int64_round_to_zero(q, s);
4631 /* r = 1.0 / (((double)q + 0.5) / 512.0) */
4632 q = int64_to_float64(q_int, s);
4633 q = float64_add(q, float64_half, s);
4634 q = float64_div(q, float64_512, s);
4635 q = float64_div(float64_one, q, s);
4637 /* s = (int)(256.0 * r + 0.5) */
4638 q = float64_mul(q, float64_256, s);
4639 q = float64_add(q, float64_half, s);
4640 q_int = float64_to_int64_round_to_zero(q, s);
4642 /* return (double)s / 256.0 */
4643 return float64_div(int64_to_float64(q_int, s), float64_256, s);
4646 /* Common wrapper to call recip_estimate */
4647 static float64 call_recip_estimate(float64 num, int off, float_status *fpst)
4649 uint64_t val64 = float64_val(num);
4650 uint64_t frac = extract64(val64, 0, 52);
4651 int64_t exp = extract64(val64, 52, 11);
4653 float64 scaled, estimate;
4655 /* Generate the scaled number for the estimate function */
4657 if (extract64(frac, 51, 1) == 0) {
4659 frac = extract64(frac, 0, 50) << 2;
4661 frac = extract64(frac, 0, 51) << 1;
4665 /* scaled = '0' : '01111111110' : fraction<51:44> : Zeros(44); */
4666 scaled = make_float64((0x3feULL << 52)
4667 | extract64(frac, 44, 8) << 44);
4669 estimate = recip_estimate(scaled, fpst);
4671 /* Build new result */
4672 val64 = float64_val(estimate);
4673 sbit = 0x8000000000000000ULL & val64;
4675 frac = extract64(val64, 0, 52);
4678 frac = 1ULL << 51 | extract64(frac, 1, 51);
4679 } else if (exp == -1) {
4680 frac = 1ULL << 50 | extract64(frac, 2, 50);
4684 return make_float64(sbit | (exp << 52) | frac);
4687 static bool round_to_inf(float_status *fpst, bool sign_bit)
4689 switch (fpst->float_rounding_mode) {
4690 case float_round_nearest_even: /* Round to Nearest */
4692 case float_round_up: /* Round to +Inf */
4694 case float_round_down: /* Round to -Inf */
4696 case float_round_to_zero: /* Round to Zero */
4700 g_assert_not_reached();
4703 float32 HELPER(recpe_f32)(float32 input, void *fpstp)
4705 float_status *fpst = fpstp;
4706 float32 f32 = float32_squash_input_denormal(input, fpst);
4707 uint32_t f32_val = float32_val(f32);
4708 uint32_t f32_sbit = 0x80000000ULL & f32_val;
4709 int32_t f32_exp = extract32(f32_val, 23, 8);
4710 uint32_t f32_frac = extract32(f32_val, 0, 23);
4716 if (float32_is_any_nan(f32)) {
4718 if (float32_is_signaling_nan(f32)) {
4719 float_raise(float_flag_invalid, fpst);
4720 nan = float32_maybe_silence_nan(f32);
4722 if (fpst->default_nan_mode) {
4723 nan = float32_default_nan;
4726 } else if (float32_is_infinity(f32)) {
4727 return float32_set_sign(float32_zero, float32_is_neg(f32));
4728 } else if (float32_is_zero(f32)) {
4729 float_raise(float_flag_divbyzero, fpst);
4730 return float32_set_sign(float32_infinity, float32_is_neg(f32));
4731 } else if ((f32_val & ~(1ULL << 31)) < (1ULL << 21)) {
4732 /* Abs(value) < 2.0^-128 */
4733 float_raise(float_flag_overflow | float_flag_inexact, fpst);
4734 if (round_to_inf(fpst, f32_sbit)) {
4735 return float32_set_sign(float32_infinity, float32_is_neg(f32));
4737 return float32_set_sign(float32_maxnorm, float32_is_neg(f32));
4739 } else if (f32_exp >= 253 && fpst->flush_to_zero) {
4740 float_raise(float_flag_underflow, fpst);
4741 return float32_set_sign(float32_zero, float32_is_neg(f32));
4745 f64 = make_float64(((int64_t)(f32_exp) << 52) | (int64_t)(f32_frac) << 29);
4746 r64 = call_recip_estimate(f64, 253, fpst);
4747 r64_val = float64_val(r64);
4748 r64_exp = extract64(r64_val, 52, 11);
4749 r64_frac = extract64(r64_val, 0, 52);
4751 /* result = sign : result_exp<7:0> : fraction<51:29>; */
4752 return make_float32(f32_sbit |
4753 (r64_exp & 0xff) << 23 |
4754 extract64(r64_frac, 29, 24));
4757 float64 HELPER(recpe_f64)(float64 input, void *fpstp)
4759 float_status *fpst = fpstp;
4760 float64 f64 = float64_squash_input_denormal(input, fpst);
4761 uint64_t f64_val = float64_val(f64);
4762 uint64_t f64_sbit = 0x8000000000000000ULL & f64_val;
4763 int64_t f64_exp = extract64(f64_val, 52, 11);
4769 /* Deal with any special cases */
4770 if (float64_is_any_nan(f64)) {
4772 if (float64_is_signaling_nan(f64)) {
4773 float_raise(float_flag_invalid, fpst);
4774 nan = float64_maybe_silence_nan(f64);
4776 if (fpst->default_nan_mode) {
4777 nan = float64_default_nan;
4780 } else if (float64_is_infinity(f64)) {
4781 return float64_set_sign(float64_zero, float64_is_neg(f64));
4782 } else if (float64_is_zero(f64)) {
4783 float_raise(float_flag_divbyzero, fpst);
4784 return float64_set_sign(float64_infinity, float64_is_neg(f64));
4785 } else if ((f64_val & ~(1ULL << 63)) < (1ULL << 50)) {
4786 /* Abs(value) < 2.0^-1024 */
4787 float_raise(float_flag_overflow | float_flag_inexact, fpst);
4788 if (round_to_inf(fpst, f64_sbit)) {
4789 return float64_set_sign(float64_infinity, float64_is_neg(f64));
4791 return float64_set_sign(float64_maxnorm, float64_is_neg(f64));
4793 } else if (f64_exp >= 1023 && fpst->flush_to_zero) {
4794 float_raise(float_flag_underflow, fpst);
4795 return float64_set_sign(float64_zero, float64_is_neg(f64));
4798 r64 = call_recip_estimate(f64, 2045, fpst);
4799 r64_val = float64_val(r64);
4800 r64_exp = extract64(r64_val, 52, 11);
4801 r64_frac = extract64(r64_val, 0, 52);
4803 /* result = sign : result_exp<10:0> : fraction<51:0> */
4804 return make_float64(f64_sbit |
4805 ((r64_exp & 0x7ff) << 52) |
4809 /* The algorithm that must be used to calculate the estimate
4810 * is specified by the ARM ARM.
4812 static float64 recip_sqrt_estimate(float64 a, float_status *real_fp_status)
4814 /* These calculations mustn't set any fp exception flags,
4815 * so we use a local copy of the fp_status.
4817 float_status dummy_status = *real_fp_status;
4818 float_status *s = &dummy_status;
4822 if (float64_lt(a, float64_half, s)) {
4823 /* range 0.25 <= a < 0.5 */
4825 /* a in units of 1/512 rounded down */
4826 /* q0 = (int)(a * 512.0); */
4827 q = float64_mul(float64_512, a, s);
4828 q_int = float64_to_int64_round_to_zero(q, s);
4830 /* reciprocal root r */
4831 /* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */
4832 q = int64_to_float64(q_int, s);
4833 q = float64_add(q, float64_half, s);
4834 q = float64_div(q, float64_512, s);
4835 q = float64_sqrt(q, s);
4836 q = float64_div(float64_one, q, s);
4838 /* range 0.5 <= a < 1.0 */
4840 /* a in units of 1/256 rounded down */
4841 /* q1 = (int)(a * 256.0); */
4842 q = float64_mul(float64_256, a, s);
4843 int64_t q_int = float64_to_int64_round_to_zero(q, s);
4845 /* reciprocal root r */
4846 /* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
4847 q = int64_to_float64(q_int, s);
4848 q = float64_add(q, float64_half, s);
4849 q = float64_div(q, float64_256, s);
4850 q = float64_sqrt(q, s);
4851 q = float64_div(float64_one, q, s);
4853 /* r in units of 1/256 rounded to nearest */
4854 /* s = (int)(256.0 * r + 0.5); */
4856 q = float64_mul(q, float64_256,s );
4857 q = float64_add(q, float64_half, s);
4858 q_int = float64_to_int64_round_to_zero(q, s);
4860 /* return (double)s / 256.0;*/
4861 return float64_div(int64_to_float64(q_int, s), float64_256, s);
4864 float32 HELPER(rsqrte_f32)(float32 input, void *fpstp)
4866 float_status *s = fpstp;
4867 float32 f32 = float32_squash_input_denormal(input, s);
4868 uint32_t val = float32_val(f32);
4869 uint32_t f32_sbit = 0x80000000 & val;
4870 int32_t f32_exp = extract32(val, 23, 8);
4871 uint32_t f32_frac = extract32(val, 0, 23);
4877 if (float32_is_any_nan(f32)) {
4879 if (float32_is_signaling_nan(f32)) {
4880 float_raise(float_flag_invalid, s);
4881 nan = float32_maybe_silence_nan(f32);
4883 if (s->default_nan_mode) {
4884 nan = float32_default_nan;
4887 } else if (float32_is_zero(f32)) {
4888 float_raise(float_flag_divbyzero, s);
4889 return float32_set_sign(float32_infinity, float32_is_neg(f32));
4890 } else if (float32_is_neg(f32)) {
4891 float_raise(float_flag_invalid, s);
4892 return float32_default_nan;
4893 } else if (float32_is_infinity(f32)) {
4894 return float32_zero;
4897 /* Scale and normalize to a double-precision value between 0.25 and 1.0,
4898 * preserving the parity of the exponent. */
4900 f64_frac = ((uint64_t) f32_frac) << 29;
4902 while (extract64(f64_frac, 51, 1) == 0) {
4903 f64_frac = f64_frac << 1;
4904 f32_exp = f32_exp-1;
4906 f64_frac = extract64(f64_frac, 0, 51) << 1;
4909 if (extract64(f32_exp, 0, 1) == 0) {
4910 f64 = make_float64(((uint64_t) f32_sbit) << 32
4914 f64 = make_float64(((uint64_t) f32_sbit) << 32
4919 result_exp = (380 - f32_exp) / 2;
4921 f64 = recip_sqrt_estimate(f64, s);
4923 val64 = float64_val(f64);
4925 val = ((result_exp & 0xff) << 23)
4926 | ((val64 >> 29) & 0x7fffff);
4927 return make_float32(val);
4930 float64 HELPER(rsqrte_f64)(float64 input, void *fpstp)
4932 float_status *s = fpstp;
4933 float64 f64 = float64_squash_input_denormal(input, s);
4934 uint64_t val = float64_val(f64);
4935 uint64_t f64_sbit = 0x8000000000000000ULL & val;
4936 int64_t f64_exp = extract64(val, 52, 11);
4937 uint64_t f64_frac = extract64(val, 0, 52);
4939 uint64_t result_frac;
4941 if (float64_is_any_nan(f64)) {
4943 if (float64_is_signaling_nan(f64)) {
4944 float_raise(float_flag_invalid, s);
4945 nan = float64_maybe_silence_nan(f64);
4947 if (s->default_nan_mode) {
4948 nan = float64_default_nan;
4951 } else if (float64_is_zero(f64)) {
4952 float_raise(float_flag_divbyzero, s);
4953 return float64_set_sign(float64_infinity, float64_is_neg(f64));
4954 } else if (float64_is_neg(f64)) {
4955 float_raise(float_flag_invalid, s);
4956 return float64_default_nan;
4957 } else if (float64_is_infinity(f64)) {
4958 return float64_zero;
4961 /* Scale and normalize to a double-precision value between 0.25 and 1.0,
4962 * preserving the parity of the exponent. */
4965 while (extract64(f64_frac, 51, 1) == 0) {
4966 f64_frac = f64_frac << 1;
4967 f64_exp = f64_exp - 1;
4969 f64_frac = extract64(f64_frac, 0, 51) << 1;
4972 if (extract64(f64_exp, 0, 1) == 0) {
4973 f64 = make_float64(f64_sbit
4977 f64 = make_float64(f64_sbit
4982 result_exp = (3068 - f64_exp) / 2;
4984 f64 = recip_sqrt_estimate(f64, s);
4986 result_frac = extract64(float64_val(f64), 0, 52);
4988 return make_float64(f64_sbit |
4989 ((result_exp & 0x7ff) << 52) |
4993 uint32_t HELPER(recpe_u32)(uint32_t a, void *fpstp)
4995 float_status *s = fpstp;
4998 if ((a & 0x80000000) == 0) {
5002 f64 = make_float64((0x3feULL << 52)
5003 | ((int64_t)(a & 0x7fffffff) << 21));
5005 f64 = recip_estimate(f64, s);
5007 return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
5010 uint32_t HELPER(rsqrte_u32)(uint32_t a, void *fpstp)
5012 float_status *fpst = fpstp;
5015 if ((a & 0xc0000000) == 0) {
5019 if (a & 0x80000000) {
5020 f64 = make_float64((0x3feULL << 52)
5021 | ((uint64_t)(a & 0x7fffffff) << 21));
5022 } else { /* bits 31-30 == '01' */
5023 f64 = make_float64((0x3fdULL << 52)
5024 | ((uint64_t)(a & 0x3fffffff) << 22));
5027 f64 = recip_sqrt_estimate(f64, fpst);
5029 return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
5032 /* VFPv4 fused multiply-accumulate */
5033 float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp)
5035 float_status *fpst = fpstp;
5036 return float32_muladd(a, b, c, 0, fpst);
5039 float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp)
5041 float_status *fpst = fpstp;
5042 return float64_muladd(a, b, c, 0, fpst);
5045 /* ARMv8 round to integral */
5046 float32 HELPER(rints_exact)(float32 x, void *fp_status)
5048 return float32_round_to_int(x, fp_status);
5051 float64 HELPER(rintd_exact)(float64 x, void *fp_status)
5053 return float64_round_to_int(x, fp_status);
5056 float32 HELPER(rints)(float32 x, void *fp_status)
5058 int old_flags = get_float_exception_flags(fp_status), new_flags;
5061 ret = float32_round_to_int(x, fp_status);
5063 /* Suppress any inexact exceptions the conversion produced */
5064 if (!(old_flags & float_flag_inexact)) {
5065 new_flags = get_float_exception_flags(fp_status);
5066 set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
5072 float64 HELPER(rintd)(float64 x, void *fp_status)
5074 int old_flags = get_float_exception_flags(fp_status), new_flags;
5077 ret = float64_round_to_int(x, fp_status);
5079 new_flags = get_float_exception_flags(fp_status);
5081 /* Suppress any inexact exceptions the conversion produced */
5082 if (!(old_flags & float_flag_inexact)) {
5083 new_flags = get_float_exception_flags(fp_status);
5084 set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
5090 /* Convert ARM rounding mode to softfloat */
5091 int arm_rmode_to_sf(int rmode)
5094 case FPROUNDING_TIEAWAY:
5095 rmode = float_round_ties_away;
5097 case FPROUNDING_ODD:
5098 /* FIXME: add support for TIEAWAY and ODD */
5099 qemu_log_mask(LOG_UNIMP, "arm: unimplemented rounding mode: %d\n",
5101 case FPROUNDING_TIEEVEN:
5103 rmode = float_round_nearest_even;
5105 case FPROUNDING_POSINF:
5106 rmode = float_round_up;
5108 case FPROUNDING_NEGINF:
5109 rmode = float_round_down;
5111 case FPROUNDING_ZERO:
5112 rmode = float_round_to_zero;
5118 static void crc_init_buffer(uint8_t *buf, uint32_t val, uint32_t bytes)
5123 buf[0] = val & 0xff;
5124 } else if (bytes == 2) {
5125 buf[0] = val & 0xff;
5126 buf[1] = (val >> 8) & 0xff;
5128 buf[0] = val & 0xff;
5129 buf[1] = (val >> 8) & 0xff;
5130 buf[2] = (val >> 16) & 0xff;
5131 buf[3] = (val >> 24) & 0xff;
5135 uint32_t HELPER(crc32)(uint32_t acc, uint32_t val, uint32_t bytes)
5139 crc_init_buffer(buf, val, bytes);
5141 /* zlib crc32 converts the accumulator and output to one's complement. */
5142 return crc32(acc ^ 0xffffffff, buf, bytes) ^ 0xffffffff;
5145 uint32_t HELPER(crc32c)(uint32_t acc, uint32_t val, uint32_t bytes)
5149 crc_init_buffer(buf, val, bytes);
5151 /* Linux crc32c converts the output to one's complement. */
5152 return crc32c(acc, buf, bytes) ^ 0xffffffff;