arch/m68k/kernel/setup.c

   1 /*
   2  *  linux/arch/m68k/kernel/setup.c
   3  *
   4  *  Copyright (C) 1995  Hamish Macdonald
   5  */
   6
   7 /*
   8  * This file handles the architecture-dependent parts of system setup
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/mm.h>
  13 #include <linux/sched.h>
  14 #include <linux/delay.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/fs.h>
  17 #include <linux/console.h>
  18 #include <linux/genhd.h>
  19 #include <linux/errno.h>
  20 #include <linux/string.h>
  21 #include <linux/init.h>
  22 #include <linux/bootmem.h>
  23 #include <linux/proc_fs.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/module.h>
  26 #include <linux/initrd.h>
  27
  28 #include <asm/bootinfo.h>
  29 #include <asm/sections.h>
  30 #include <asm/setup.h>
  31 #include <asm/fpu.h>
  32 #include <asm/irq.h>
  33 #include <asm/io.h>
  34 #include <asm/machdep.h>
  35 #ifdef CONFIG_AMIGA
  36 #include <asm/amigahw.h>
  37 #endif
  38 #ifdef CONFIG_ATARI
  39 #include <asm/atarihw.h>
  40 #include <asm/atari_stram.h>
  41 #endif
  42 #ifdef CONFIG_SUN3X
  43 #include <asm/dvma.h>
  44 #endif
  45
  46 #if !FPSTATESIZE || !NR_IRQS
  47 #warning No CPU/platform type selected, your kernel will not work!
  48 #warning Are you building an allnoconfig kernel?
  49 #endif
  50
  51 unsigned long m68k_machtype;
  52 EXPORT_SYMBOL(m68k_machtype);
  53 unsigned long m68k_cputype;
  54 EXPORT_SYMBOL(m68k_cputype);
  55 unsigned long m68k_fputype;
  56 unsigned long m68k_mmutype;
  57 EXPORT_SYMBOL(m68k_mmutype);
  58 #ifdef CONFIG_VME
  59 unsigned long vme_brdtype;
  60 EXPORT_SYMBOL(vme_brdtype);
  61 #endif
  62
  63 int m68k_is040or060;
  64 EXPORT_SYMBOL(m68k_is040or060);
  65
  66 extern unsigned long availmem;
  67
  68 int m68k_num_memory;
  69 EXPORT_SYMBOL(m68k_num_memory);
  70 int m68k_realnum_memory;
  71 EXPORT_SYMBOL(m68k_realnum_memory);
  72 unsigned long m68k_memoffset;
  73 struct mem_info m68k_memory[NUM_MEMINFO];
  74 EXPORT_SYMBOL(m68k_memory);
  75
  76 struct mem_info m68k_ramdisk;
  77
  78 //if there is uboot support, do it uboot way
  79 #ifdef CONFIG_UBOOT
  80 char m68k_command_line[CL_SIZE];
  81 #else
  82 static char m68k_command_line[CL_SIZE];
  83 #endif
  84
  85 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  86 /* machine dependent irq functions */
  87 void (*mach_init_IRQ) (void) __initdata = NULL;
  88 void (*mach_get_model) (char *model);
  89 void (*mach_get_hardware_list) (struct seq_file *m);
  90 #ifdef CONFIG_COLDFIRE
  91 void (*mach_tick)(void);
  92 #endif
  93 /* machine dependent timer functions */
  94 unsigned long (*mach_gettimeoffset) (void);
  95 int (*mach_hwclk) (int, struct rtc_time*);
  96 EXPORT_SYMBOL(mach_hwclk);
  97 int (*mach_set_clock_mmss) (unsigned long);
  98 unsigned int (*mach_get_ss)(void);
  99 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
 100 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
 101 EXPORT_SYMBOL(mach_get_ss);
 102 EXPORT_SYMBOL(mach_get_rtc_pll);
 103 EXPORT_SYMBOL(mach_set_rtc_pll);
 104 void (*mach_reset)( void );
 105 void (*mach_halt)( void );
 106 void (*mach_power_off)( void );
 107 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
 108 #ifdef CONFIG_HEARTBEAT
 109 void (*mach_heartbeat) (int);
 110 EXPORT_SYMBOL(mach_heartbeat);
 111 #endif
 112 #ifdef CONFIG_M68K_L2_CACHE
 113 void (*mach_l2_flush) (int);
 114 #endif
 115 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 116 void (*mach_beep)(unsigned int, unsigned int);
 117 EXPORT_SYMBOL(mach_beep);
 118 #endif
 119 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 120 int isa_type;
 121 int isa_sex;
 122 EXPORT_SYMBOL(isa_type);
 123 EXPORT_SYMBOL(isa_sex);
 124 #endif
 125
 126 extern int amiga_parse_bootinfo(const struct bi_record *);
 127 extern int atari_parse_bootinfo(const struct bi_record *);
 128 extern int mac_parse_bootinfo(const struct bi_record *);
 129 extern int q40_parse_bootinfo(const struct bi_record *);
 130 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 131 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 132 extern int mvme147_parse_bootinfo(const struct bi_record *);
 133 extern int hp300_parse_bootinfo(const struct bi_record *);
 134 extern int apollo_parse_bootinfo(const struct bi_record *);
 135 extern int coldfire_parse_bootinfo(const struct bi_record *);
 136
 137 #ifdef CONFIG_COLDFIRE
 138 void coldfire_sort_memrec(void);
 139 #endif
 140
 141 extern void config_amiga(void);
 142 extern void config_atari(void);
 143 extern void config_mac(void);
 144 extern void config_sun3(void);
 145 extern void config_apollo(void);
 146 extern void config_mvme147(void);
 147 extern void config_mvme16x(void);
 148 extern void config_bvme6000(void);
 149 extern void config_hp300(void);
 150 extern void config_q40(void);
 151 extern void config_sun3x(void);
 152 extern void config_coldfire(void);
 153
 154 #define MASK_256K 0xfffc0000
 155
 156 extern void paging_init(void);
 157
 158 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 159 {
 160         while (record->tag != BI_LAST) {
 161                 int unknown = 0;
 162                 const unsigned long *data = record->data;
 163
 164                 switch (record->tag) {
 165                 case BI_MACHTYPE:
 166                 case BI_CPUTYPE:
 167                 case BI_FPUTYPE:
 168                 case BI_MMUTYPE:
 169                         /* Already set up by head.S */
 170                         /* In case of Coldfire it's set up in config.c*/
 171                         break;
 172
 173                 case BI_MEMCHUNK:
 174                         if (m68k_num_memory < NUM_MEMINFO) {
 175                                 m68k_memory[m68k_num_memory].addr = data[0];
 176                                 m68k_memory[m68k_num_memory].size = data[1];
 177                                 m68k_num_memory++;
 178                         } else
 179                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 180                         break;
 181
 182                 case BI_RAMDISK:
 183 //if U-boot then ignore
 184 #ifndef CONFIG_UBOOT
 185                         m68k_ramdisk.addr = data[0];
 186                         m68k_ramdisk.size = data[1];
 187 #endif
 188                         break;
 189
 190                 case BI_COMMAND_LINE:
 191 //if U-boot then ignore
 192 #ifndef CONFIG_UBOOT
 193                         strlcpy(m68k_command_line, (const char *)data,
 194                                 sizeof(m68k_command_line));
 195 #endif
 196                         break;
 197
 198                 default:
 199                         if (MACH_IS_AMIGA)
 200                                 unknown = amiga_parse_bootinfo(record);
 201                         else if (MACH_IS_ATARI)
 202                                 unknown = atari_parse_bootinfo(record);
 203                         else if (MACH_IS_MAC)
 204                                 unknown = mac_parse_bootinfo(record);
 205                         else if (MACH_IS_Q40)
 206                                 unknown = q40_parse_bootinfo(record);
 207                         else if (MACH_IS_BVME6000)
 208                                 unknown = bvme6000_parse_bootinfo(record);
 209                         else if (MACH_IS_MVME16x)
 210                                 unknown = mvme16x_parse_bootinfo(record);
 211                         else if (MACH_IS_MVME147)
 212                                 unknown = mvme147_parse_bootinfo(record);
 213                         else if (MACH_IS_HP300)
 214                                 unknown = hp300_parse_bootinfo(record);
 215                         else if (MACH_IS_APOLLO)
 216                                 unknown = apollo_parse_bootinfo(record);
 217                         else if (MACH_IS_COLDFIRE)
 218                                 unknown = coldfire_parse_bootinfo(record);
 219                         else
 220                                 unknown = 1;
 221                 }
 222                 if (unknown)
 223                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 224                                record->tag);
 225                 record = (struct bi_record *)((unsigned long)record +
 226                                               record->size);
 227         }
 228
 229 #ifdef CONFIG_COLDFIRE
 230         if (MACH_IS_COLDFIRE)
 231     coldfire_sort_memrec();
 232 #endif
 233
 234         m68k_realnum_memory = m68k_num_memory;
 235 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 236         if (m68k_num_memory > 1) {
 237                 printk("Ignoring last %i chunks of physical memory\n",
 238                        (m68k_num_memory - 1));
 239                 m68k_num_memory = 1;
 240         }
 241 #endif
 242 }
 243
 244 void __init setup_arch(char **cmdline_p)
 245 {
 246         int i;
 247
 248         /* The bootinfo is located right after the kernel bss */
 249         m68k_parse_bootinfo((const struct bi_record *)_end);
 250
 251         if (CPU_IS_040)
 252                 m68k_is040or060 = 4;
 253         else if (CPU_IS_060)
 254                 m68k_is040or060 = 6;
 255
 256         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 257          * be confused by software FPU emulation. BEWARE.
 258          * We should really do our own FPU check at startup.
 259          * [what do we do with buggy 68LC040s? if we have problems
 260          *  with them, we should add a test to check_bugs() below] */
 261 #ifndef CONFIG_M68KFPU_EMU_ONLY
 262         /* clear the fpu if we have one */
 263         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 264                 volatile int zero = 0;
 265                 asm volatile ("frestore %0" : : "m" (zero));
 266         }
 267 #endif
 268
 269         if (CPU_IS_060) {
 270                 u32 pcr;
 271
 272                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 273                      : "=d" (pcr));
 274                 if (((pcr >> 8) & 0xff) <= 5) {
 275                         printk("Enabling workaround for errata I14\n");
 276                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 277                              : : "d" (pcr | 0x20));
 278                 }
 279         }
 280
 281         init_mm.start_code = PAGE_OFFSET;
 282         init_mm.end_code = (unsigned long)_etext;
 283         init_mm.end_data = (unsigned long)_edata;
 284         init_mm.brk = (unsigned long)_end;
 285
 286         *cmdline_p = m68k_command_line;
 287         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 288
 289         parse_early_param();
 290
 291 #ifdef CONFIG_DUMMY_CONSOLE
 292         conswitchp = &dummy_con;
 293 #endif
 294
 295         switch (m68k_machtype) {
 296 #ifdef CONFIG_AMIGA
 297         case MACH_AMIGA:
 298                 config_amiga();
 299                 break;
 300 #endif
 301 #ifdef CONFIG_ATARI
 302         case MACH_ATARI:
 303                 config_atari();
 304                 break;
 305 #endif
 306 #ifdef CONFIG_MAC
 307         case MACH_MAC:
 308                 config_mac();
 309                 break;
 310 #endif
 311 #ifdef CONFIG_SUN3
 312         case MACH_SUN3:
 313                 config_sun3();
 314                 break;
 315 #endif
 316 #ifdef CONFIG_APOLLO
 317         case MACH_APOLLO:
 318                 config_apollo();
 319                 break;
 320 #endif
 321 #ifdef CONFIG_MVME147
 322         case MACH_MVME147:
 323                 config_mvme147();
 324                 break;
 325 #endif
 326 #ifdef CONFIG_MVME16x
 327         case MACH_MVME16x:
 328                 config_mvme16x();
 329                 break;
 330 #endif
 331 #ifdef CONFIG_BVME6000
 332         case MACH_BVME6000:
 333                 config_bvme6000();
 334                 break;
 335 #endif
 336 #ifdef CONFIG_HP300
 337         case MACH_HP300:
 338                 config_hp300();
 339                 break;
 340 #endif
 341 #ifdef CONFIG_Q40
 342         case MACH_Q40:
 343                 config_q40();
 344                 break;
 345 #endif
 346 #ifdef CONFIG_SUN3X
 347         case MACH_SUN3X:
 348                 config_sun3x();
 349                 break;
 350 #endif
 351 #ifdef CONFIG_COLDFIRE
 352         case MACH_CFMMU:
 353                 config_coldfire();
 354                 break;
 355 #endif
 356         default:
 357                 panic("No configuration setup");
 358         }
 359
 360         paging_init();
 361
 362 #ifndef CONFIG_SUN3
 363         for (i = 1; i < m68k_num_memory; i++)
 364                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 365                                   m68k_memory[i].size);
 366 #ifdef CONFIG_BLK_DEV_INITRD
 367         if (m68k_ramdisk.size) {
 368                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 369                                      m68k_ramdisk.addr, m68k_ramdisk.size,
 370                                      BOOTMEM_DEFAULT);
 371                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 372                 initrd_end = initrd_start + m68k_ramdisk.size;
 373                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 374         }
 375 #endif
 376
 377 #ifdef CONFIG_ATARI
 378         if (MACH_IS_ATARI)
 379                 atari_stram_reserve_pages((void *)availmem);
 380 #endif
 381 #ifdef CONFIG_SUN3X
 382         if (MACH_IS_SUN3X) {
 383                 dvma_init();
 384         }
 385 #endif
 386
 387 #endif /* !CONFIG_SUN3 */
 388
 389 #ifdef CONFIG_COLDFIRE
 390         if (MACH_IS_COLDFIRE)
 391                 mmu_context_init();
 392 #endif
 393
 394 /* set ISA defs early as possible */
 395 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 396         if (MACH_IS_Q40) {
 397                 isa_type = ISA_TYPE_Q40;
 398                 isa_sex = 0;
 399         }
 400 #ifdef CONFIG_AMIGA_PCMCIA
 401         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 402                 isa_type = ISA_TYPE_AG;
 403                 isa_sex = 1;
 404         }
 405 #endif
 406 #endif
 407 }
 408
 409 static int show_cpuinfo(struct seq_file *m, void *v)
 410 {
 411         const char *cpu, *mmu, *fpu;
 412         unsigned long clockfreq, clockfactor;
 413
 414 #define LOOP_CYCLES_68020       (8)
 415 #define LOOP_CYCLES_68030       (8)
 416 #define LOOP_CYCLES_68040       (3)
 417 #define LOOP_CYCLES_68060       (1)
 418 #define LOOP_CYCLES_COLDFIRE    (2)
 419
 420         if (CPU_IS_020) {
 421                 cpu = "68020";
 422                 clockfactor = LOOP_CYCLES_68020;
 423         } else if (CPU_IS_030) {
 424                 cpu = "68030";
 425                 clockfactor = LOOP_CYCLES_68030;
 426         } else if (CPU_IS_040) {
 427                 cpu = "68040";
 428                 clockfactor = LOOP_CYCLES_68040;
 429         } else if (CPU_IS_060) {
 430                 cpu = "68060";
 431                 clockfactor = LOOP_CYCLES_68060;
 432         } else if (CPU_IS_CFV4E) {
 433                 cpu = "ColdFire V4e";
 434                 clockfactor = LOOP_CYCLES_COLDFIRE;
 435         } else {
 436                 cpu = "680x0";
 437                 clockfactor = 0;
 438         }
 439
 440 #ifdef CONFIG_M68KFPU_EMU_ONLY
 441         fpu = "none(soft float)";
 442 #else
 443         if (m68k_fputype & FPU_68881)
 444                 fpu = "68881";
 445         else if (m68k_fputype & FPU_68882)
 446                 fpu = "68882";
 447         else if (m68k_fputype & FPU_68040)
 448                 fpu = "68040";
 449         else if (m68k_fputype & FPU_68060)
 450                 fpu = "68060";
 451         else if (m68k_fputype & FPU_SUNFPA)
 452                 fpu = "Sun FPA";
 453         else if (m68k_fputype & FPU_CFV4E)
 454                 fpu = "ColdFire V4e";
 455         else
 456                 fpu = "none";
 457 #endif
 458
 459         if (m68k_mmutype & MMU_68851)
 460                 mmu = "68851";
 461         else if (m68k_mmutype & MMU_68030)
 462                 mmu = "68030";
 463         else if (m68k_mmutype & MMU_68040)
 464                 mmu = "68040";
 465         else if (m68k_mmutype & MMU_68060)
 466                 mmu = "68060";
 467         else if (m68k_mmutype & MMU_SUN3)
 468                 mmu = "Sun-3";
 469         else if (m68k_mmutype & MMU_APOLLO)
 470                 mmu = "Apollo";
 471         else if (m68k_mmutype & MMU_CFV4E)
 472                 mmu = "ColdFire";
 473         else
 474                 mmu = "unknown";
 475
 476         clockfreq = loops_per_jiffy * HZ * clockfactor;
 477
 478         seq_printf(m, "CPU:\t\t%s\n"
 479                    "MMU:\t\t%s\n"
 480                    "FPU:\t\t%s\n"
 481                    "Clocking:\t%lu.%1luMHz\n"
 482                    "BogoMips:\t%lu.%02lu\n"
 483                    "Calibration:\t%lu loops\n",
 484                    cpu, mmu, fpu,
 485                    clockfreq/1000000,(clockfreq/100000)%10,
 486                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 487                    loops_per_jiffy);
 488         return 0;
 489 }
 490
 491 static void *c_start(struct seq_file *m, loff_t *pos)
 492 {
 493         return *pos < 1 ? (void *)1 : NULL;
 494 }
 495 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 496 {
 497         ++*pos;
 498         return NULL;
 499 }
 500 static void c_stop(struct seq_file *m, void *v)
 501 {
 502 }
 503 const struct seq_operations cpuinfo_op = {
 504         .start  = c_start,
 505         .next   = c_next,
 506         .stop   = c_stop,
 507         .show   = show_cpuinfo,
 508 };
 509
 510 #ifdef CONFIG_PROC_HARDWARE
 511 static int hardware_proc_show(struct seq_file *m, void *v)
 512 {
 513         char model[80];
 514         unsigned long mem;
 515         int i;
 516
 517         if (mach_get_model)
 518                 mach_get_model(model);
 519         else
 520                 strcpy(model, "Unknown m68k");
 521
 522         seq_printf(m, "Model:\t\t%s\n", model);
 523         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 524                 mem += m68k_memory[i].size;
 525         seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
 526
 527         if (mach_get_hardware_list)
 528                 mach_get_hardware_list(m);
 529
 530         return 0;
 531 }
 532
 533 static int hardware_proc_open(struct inode *inode, struct file *file)
 534 {
 535         return single_open(file, hardware_proc_show, NULL);
 536 }
 537
 538 static const struct file_operations hardware_proc_fops = {
 539         .open           = hardware_proc_open,
 540         .read           = seq_read,
 541         .llseek         = seq_lseek,
 542         .release        = single_release,
 543 };
 544
 545 static int __init proc_hardware_init(void)
 546 {
 547         proc_create("hardware", 0, NULL, &hardware_proc_fops);
 548         return 0;
 549 }
 550 module_init(proc_hardware_init);
 551 #endif
 552
 553 void check_bugs(void)
 554 {
 555 #ifndef CONFIG_M68KFPU_EMU
 556         if (m68k_fputype == 0) {
 557                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 558                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 559                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 560                         "emulation project\n");
 561                 panic("no FPU");
 562         }
 563 #endif /* !CONFIG_M68KFPU_EMU */
 564 }
 565
 566 #ifdef CONFIG_ADB
 567 static int __init adb_probe_sync_enable (char *str) {
 568         extern int __adb_probe_sync;
 569         __adb_probe_sync = 1;
 570         return 1;
 571 }
 572
 573 __setup("adb_sync", adb_probe_sync_enable);
 574 #endif /* CONFIG_ADB */