cpu-defs.h

   1 /*
   2  * common defines for all CPUs
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #ifndef CPU_DEFS_H
  20 #define CPU_DEFS_H
  21
  22 #ifndef NEED_CPU_H
  23 #error cpu.h included from common code
  24 #endif
  25
  26 #include "config.h"
  27 #include <setjmp.h>
  28 #include <inttypes.h>
  29 #include <signal.h>
  30 #include "osdep.h"
  31 #include "qemu-queue.h"
  32 #include "targphys.h"
  33
  34 #ifndef TARGET_LONG_BITS
  35 #error TARGET_LONG_BITS must be defined before including this header
  36 #endif
  37
  38 #define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
  39
  40 typedef int16_t target_short __attribute__ ((aligned(TARGET_SHORT_ALIGNMENT)));
  41 typedef uint16_t target_ushort __attribute__((aligned(TARGET_SHORT_ALIGNMENT)));
  42 typedef int32_t target_int __attribute__((aligned(TARGET_INT_ALIGNMENT)));
  43 typedef uint32_t target_uint __attribute__((aligned(TARGET_INT_ALIGNMENT)));
  44 typedef int64_t target_llong __attribute__((aligned(TARGET_LLONG_ALIGNMENT)));
  45 typedef uint64_t target_ullong __attribute__((aligned(TARGET_LLONG_ALIGNMENT)));
  46 /* target_ulong is the type of a virtual address */
  47 #if TARGET_LONG_SIZE == 4
  48 typedef int32_t target_long __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
  49 typedef uint32_t target_ulong __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
  50 #define TARGET_FMT_lx "%08x"
  51 #define TARGET_FMT_ld "%d"
  52 #define TARGET_FMT_lu "%u"
  53 #elif TARGET_LONG_SIZE == 8
  54 typedef int64_t target_long __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
  55 typedef uint64_t target_ulong __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
  56 #define TARGET_FMT_lx "%016" PRIx64
  57 #define TARGET_FMT_ld "%" PRId64
  58 #define TARGET_FMT_lu "%" PRIu64
  59 #else
  60 #error TARGET_LONG_SIZE undefined
  61 #endif
  62
  63 #define HOST_LONG_SIZE (HOST_LONG_BITS / 8)
  64
  65 #define EXCP_INTERRUPT  0x10000 /* async interruption */
  66 #define EXCP_HLT        0x10001 /* hlt instruction reached */
  67 #define EXCP_DEBUG      0x10002 /* cpu stopped after a breakpoint or singlestep */
  68 #define EXCP_HALTED     0x10003 /* cpu is halted (waiting for external event) */
  69
  70 #define TB_JMP_CACHE_BITS 12
  71 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS)
  72
  73 /* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
  74    addresses on the same page.  The top bits are the same.  This allows
  75    TLB invalidation to quickly clear a subset of the hash table.  */
  76 #define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
  77 #define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
  78 #define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
  79 #define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
  80
  81 #if !defined(CONFIG_USER_ONLY)
  82 #define CPU_TLB_BITS 8
  83 #define CPU_TLB_SIZE (1 << CPU_TLB_BITS)
  84
  85 #if HOST_LONG_BITS == 32 && TARGET_LONG_BITS == 32
  86 #define CPU_TLB_ENTRY_BITS 4
  87 #else
  88 #define CPU_TLB_ENTRY_BITS 5
  89 #endif
  90
  91 typedef struct CPUTLBEntry {
  92     /* bit TARGET_LONG_BITS to TARGET_PAGE_BITS : virtual address
  93        bit TARGET_PAGE_BITS-1..4  : Nonzero for accesses that should not
  94                                     go directly to ram.
  95        bit 3                      : indicates that the entry is invalid
  96        bit 2..0                   : zero
  97     */
  98     target_ulong addr_read;
  99     target_ulong addr_write;
 100     target_ulong addr_code;
 101     /* Addend to virtual address to get host address.  IO accesses
 102        use the corresponding iotlb value.  */
 103     unsigned long addend;
 104     /* padding to get a power of two size */
 105     uint8_t dummy[(1 << CPU_TLB_ENTRY_BITS) -
 106                   (sizeof(target_ulong) * 3 +
 107                    ((-sizeof(target_ulong) * 3) & (sizeof(unsigned long) - 1)) +
 108                    sizeof(unsigned long))];
 109 } CPUTLBEntry;
 110
 111 extern int CPUTLBEntry_wrong_size[sizeof(CPUTLBEntry) == (1 << CPU_TLB_ENTRY_BITS) ? 1 : -1];
 112
 113 #define CPU_COMMON_TLB \
 114     /* The meaning of the MMU modes is defined in the target code. */   \
 115     CPUTLBEntry tlb_table[NB_MMU_MODES][CPU_TLB_SIZE];                  \
 116     target_phys_addr_t iotlb[NB_MMU_MODES][CPU_TLB_SIZE];               \
 117     target_ulong tlb_flush_addr;                                        \
 118     target_ulong tlb_flush_mask;
 119
 120 #else
 121
 122 #define CPU_COMMON_TLB
 123
 124 #endif
 125
 126
 127 #ifdef HOST_WORDS_BIGENDIAN
 128 typedef struct icount_decr_u16 {
 129     uint16_t high;
 130     uint16_t low;
 131 } icount_decr_u16;
 132 #else
 133 typedef struct icount_decr_u16 {
 134     uint16_t low;
 135     uint16_t high;
 136 } icount_decr_u16;
 137 #endif
 138
 139 struct kvm_run;
 140 struct KVMState;
 141 struct qemu_work_item;
 142
 143 typedef struct CPUBreakpoint {
 144     target_ulong pc;
 145     int flags; /* BP_* */
 146     QTAILQ_ENTRY(CPUBreakpoint) entry;
 147 } CPUBreakpoint;
 148
 149 typedef struct CPUWatchpoint {
 150     target_ulong vaddr;
 151     target_ulong len_mask;
 152     int flags; /* BP_* */
 153     QTAILQ_ENTRY(CPUWatchpoint) entry;
 154 } CPUWatchpoint;
 155
 156 #ifdef _WIN32
 157 #define CPU_COMMON_THREAD \
 158     void *hThread;
 159
 160 #else
 161 #define CPU_COMMON_THREAD
 162 #endif
 163
 164 #define CPU_TEMP_BUF_NLONGS 128
 165 #define CPU_COMMON                                                      \
 166     struct TranslationBlock *current_tb; /* currently executing TB  */  \
 167     /* soft mmu support */                                              \
 168     /* in order to avoid passing too many arguments to the MMIO         \
 169        helpers, we store some rarely used information in the CPU        \
 170        context) */                                                      \
 171     unsigned long mem_io_pc; /* host pc at which the memory was         \
 172                                 accessed */                             \
 173     target_ulong mem_io_vaddr; /* target virtual addr at which the      \
 174                                      memory was accessed */             \
 175     uint32_t halted; /* Nonzero if the CPU is in suspend state */       \
 176     uint32_t interrupt_request;                                         \
 177     volatile sig_atomic_t exit_request;                                 \
 178     CPU_COMMON_TLB                                                      \
 179     struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE];           \
 180     /* buffer for temporaries in the code generator */                  \
 181     long temp_buf[CPU_TEMP_BUF_NLONGS];                                 \
 182                                                                         \
 183     int64_t icount_extra; /* Instructions until next timer event.  */   \
 184     /* Number of cycles left, with interrupt flag in high bit.          \
 185        This allows a single read-compare-cbranch-write sequence to test \
 186        for both decrementer underflow and exceptions.  */               \
 187     union {                                                             \
 188         uint32_t u32;                                                   \
 189         icount_decr_u16 u16;                                            \
 190     } icount_decr;                                                      \
 191     uint32_t can_do_io; /* nonzero if memory mapped IO is safe.  */     \
 192                                                                         \
 193     /* from this point: preserved by CPU reset */                       \
 194     /* ice debug support */                                             \
 195     QTAILQ_HEAD(breakpoints_head, CPUBreakpoint) breakpoints;            \
 196     int singlestep_enabled;                                             \
 197                                                                         \
 198     QTAILQ_HEAD(watchpoints_head, CPUWatchpoint) watchpoints;            \
 199     CPUWatchpoint *watchpoint_hit;                                      \
 200                                                                         \
 201     struct GDBRegisterState *gdb_regs;                                  \
 202                                                                         \
 203     /* Core interrupt code */                                           \
 204     jmp_buf jmp_env;                                                    \
 205     int exception_index;                                                \
 206                                                                         \
 207     CPUState *next_cpu; /* next CPU sharing TB cache */                 \
 208     int cpu_index; /* CPU index (informative) */                        \
 209     uint32_t host_tid; /* host thread ID */                             \
 210     int numa_node; /* NUMA node this cpu is belonging to  */            \
 211     int nr_cores;  /* number of cores within this CPU package */        \
 212     int nr_threads;/* number of threads within this CPU */              \
 213     int running; /* Nonzero if cpu is currently running(usermode).  */  \
 214     int thread_id;                                                      \
 215     /* user data */                                                     \
 216     void *opaque;                                                       \
 217                                                                         \
 218     uint32_t created;                                                   \
 219     uint32_t stop;   /* Stop request */                                 \
 220     uint32_t stopped; /* Artificially stopped */                        \
 221     struct QemuThread *thread;                                          \
 222     CPU_COMMON_THREAD                                                   \
 223     struct QemuCond *halt_cond;                                         \
 224     int thread_kicked;                                                  \
 225     struct qemu_work_item *queued_work_first, *queued_work_last;        \
 226     const char *cpu_model_str;                                          \
 227     struct KVMState *kvm_state;                                         \
 228     struct kvm_run *kvm_run;                                            \
 229     int kvm_fd;                                                         \
 230     int kvm_vcpu_dirty;
 231
 232 #endif