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/seq_file.h>
  24 #include <linux/module.h>
  25 #include <linux/initrd.h>
  26
  27 #include <asm/bootinfo.h>
  28 #include <asm/setup.h>
  29 #include <asm/fpu.h>
  30 #include <asm/irq.h>
  31 #include <asm/io.h>
  32 #include <asm/machdep.h>
  33 #ifdef CONFIG_AMIGA
  34 #include <asm/amigahw.h>
  35 #endif
  36 #ifdef CONFIG_ATARI
  37 #include <asm/atarihw.h>
  38 #include <asm/atari_stram.h>
  39 #endif
  40 #ifdef CONFIG_SUN3X
  41 #include <asm/dvma.h>
  42 #endif
  43
  44 #if !FPSTATESIZE || !NR_IRQS
  45 #warning No CPU/platform type selected, your kernel will not work!
  46 #warning Are you building an allnoconfig kernel?
  47 #endif
  48
  49 unsigned long m68k_machtype;
  50 EXPORT_SYMBOL(m68k_machtype);
  51 unsigned long m68k_cputype;
  52 EXPORT_SYMBOL(m68k_cputype);
  53 unsigned long m68k_fputype;
  54 unsigned long m68k_mmutype;
  55 EXPORT_SYMBOL(m68k_mmutype);
  56 #ifdef CONFIG_VME
  57 unsigned long vme_brdtype;
  58 EXPORT_SYMBOL(vme_brdtype);
  59 #endif
  60
  61 int m68k_is040or060;
  62 EXPORT_SYMBOL(m68k_is040or060);
  63
  64 extern int end;
  65 extern unsigned long availmem;
  66
  67 int m68k_num_memory;
  68 EXPORT_SYMBOL(m68k_num_memory);
  69 int m68k_realnum_memory;
  70 EXPORT_SYMBOL(m68k_realnum_memory);
  71 unsigned long m68k_memoffset;
  72 struct mem_info m68k_memory[NUM_MEMINFO];
  73 EXPORT_SYMBOL(m68k_memory);
  74
  75 struct mem_info m68k_ramdisk;
  76
  77 static char m68k_command_line[CL_SIZE];
  78
  79 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  80 /* machine dependent irq functions */
  81 void (*mach_init_IRQ) (void) __initdata = NULL;
  82 void (*mach_get_model) (char *model);
  83 int (*mach_get_hardware_list) (char *buffer);
  84 /* machine dependent timer functions */
  85 unsigned long (*mach_gettimeoffset) (void);
  86 int (*mach_hwclk) (int, struct rtc_time*);
  87 EXPORT_SYMBOL(mach_hwclk);
  88 int (*mach_set_clock_mmss) (unsigned long);
  89 unsigned int (*mach_get_ss)(void);
  90 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  91 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  92 EXPORT_SYMBOL(mach_get_ss);
  93 EXPORT_SYMBOL(mach_get_rtc_pll);
  94 EXPORT_SYMBOL(mach_set_rtc_pll);
  95 void (*mach_reset)( void );
  96 void (*mach_halt)( void );
  97 void (*mach_power_off)( void );
  98 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
  99 #ifdef CONFIG_HEARTBEAT
 100 void (*mach_heartbeat) (int);
 101 EXPORT_SYMBOL(mach_heartbeat);
 102 #endif
 103 #ifdef CONFIG_M68K_L2_CACHE
 104 void (*mach_l2_flush) (int);
 105 #endif
 106 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 107 void (*mach_beep)(unsigned int, unsigned int);
 108 EXPORT_SYMBOL(mach_beep);
 109 #endif
 110 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 111 int isa_type;
 112 int isa_sex;
 113 EXPORT_SYMBOL(isa_type);
 114 EXPORT_SYMBOL(isa_sex);
 115 #endif
 116
 117 extern int amiga_parse_bootinfo(const struct bi_record *);
 118 extern int atari_parse_bootinfo(const struct bi_record *);
 119 extern int mac_parse_bootinfo(const struct bi_record *);
 120 extern int q40_parse_bootinfo(const struct bi_record *);
 121 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 122 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 123 extern int mvme147_parse_bootinfo(const struct bi_record *);
 124 extern int hp300_parse_bootinfo(const struct bi_record *);
 125 extern int apollo_parse_bootinfo(const struct bi_record *);
 126
 127 extern void config_amiga(void);
 128 extern void config_atari(void);
 129 extern void config_mac(void);
 130 extern void config_sun3(void);
 131 extern void config_apollo(void);
 132 extern void config_mvme147(void);
 133 extern void config_mvme16x(void);
 134 extern void config_bvme6000(void);
 135 extern void config_hp300(void);
 136 extern void config_q40(void);
 137 extern void config_sun3x(void);
 138
 139 #define MASK_256K 0xfffc0000
 140
 141 extern void paging_init(void);
 142
 143 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 144 {
 145         while (record->tag != BI_LAST) {
 146                 int unknown = 0;
 147                 const unsigned long *data = record->data;
 148
 149                 switch (record->tag) {
 150                 case BI_MACHTYPE:
 151                 case BI_CPUTYPE:
 152                 case BI_FPUTYPE:
 153                 case BI_MMUTYPE:
 154                         /* Already set up by head.S */
 155                         break;
 156
 157                 case BI_MEMCHUNK:
 158                         if (m68k_num_memory < NUM_MEMINFO) {
 159                                 m68k_memory[m68k_num_memory].addr = data[0];
 160                                 m68k_memory[m68k_num_memory].size = data[1];
 161                                 m68k_num_memory++;
 162                         } else
 163                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 164                         break;
 165
 166                 case BI_RAMDISK:
 167                         m68k_ramdisk.addr = data[0];
 168                         m68k_ramdisk.size = data[1];
 169                         break;
 170
 171                 case BI_COMMAND_LINE:
 172                         strlcpy(m68k_command_line, (const char *)data,
 173                                 sizeof(m68k_command_line));
 174                         break;
 175
 176                 default:
 177                         if (MACH_IS_AMIGA)
 178                                 unknown = amiga_parse_bootinfo(record);
 179                         else if (MACH_IS_ATARI)
 180                                 unknown = atari_parse_bootinfo(record);
 181                         else if (MACH_IS_MAC)
 182                                 unknown = mac_parse_bootinfo(record);
 183                         else if (MACH_IS_Q40)
 184                                 unknown = q40_parse_bootinfo(record);
 185                         else if (MACH_IS_BVME6000)
 186                                 unknown = bvme6000_parse_bootinfo(record);
 187                         else if (MACH_IS_MVME16x)
 188                                 unknown = mvme16x_parse_bootinfo(record);
 189                         else if (MACH_IS_MVME147)
 190                                 unknown = mvme147_parse_bootinfo(record);
 191                         else if (MACH_IS_HP300)
 192                                 unknown = hp300_parse_bootinfo(record);
 193                         else if (MACH_IS_APOLLO)
 194                                 unknown = apollo_parse_bootinfo(record);
 195                         else
 196                                 unknown = 1;
 197                 }
 198                 if (unknown)
 199                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 200                                record->tag);
 201                 record = (struct bi_record *)((unsigned long)record +
 202                                               record->size);
 203         }
 204
 205         m68k_realnum_memory = m68k_num_memory;
 206 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 207         if (m68k_num_memory > 1) {
 208                 printk("Ignoring last %i chunks of physical memory\n",
 209                        (m68k_num_memory - 1));
 210                 m68k_num_memory = 1;
 211         }
 212 #endif
 213 }
 214
 215 void __init setup_arch(char **cmdline_p)
 216 {
 217         extern int _etext, _edata, _end;
 218         int i;
 219
 220         /* The bootinfo is located right after the kernel bss */
 221         m68k_parse_bootinfo((const struct bi_record *)&_end);
 222
 223         if (CPU_IS_040)
 224                 m68k_is040or060 = 4;
 225         else if (CPU_IS_060)
 226                 m68k_is040or060 = 6;
 227
 228         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 229          * be confused by software FPU emulation. BEWARE.
 230          * We should really do our own FPU check at startup.
 231          * [what do we do with buggy 68LC040s? if we have problems
 232          *  with them, we should add a test to check_bugs() below] */
 233 #ifndef CONFIG_M68KFPU_EMU_ONLY
 234         /* clear the fpu if we have one */
 235         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 236                 volatile int zero = 0;
 237                 asm volatile ("frestore %0" : : "m" (zero));
 238         }
 239 #endif
 240
 241         if (CPU_IS_060) {
 242                 u32 pcr;
 243
 244                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 245                      : "=d" (pcr));
 246                 if (((pcr >> 8) & 0xff) <= 5) {
 247                         printk("Enabling workaround for errata I14\n");
 248                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 249                              : : "d" (pcr | 0x20));
 250                 }
 251         }
 252
 253         init_mm.start_code = PAGE_OFFSET;
 254         init_mm.end_code = (unsigned long) &_etext;
 255         init_mm.end_data = (unsigned long) &_edata;
 256         init_mm.brk = (unsigned long) &_end;
 257
 258         *cmdline_p = m68k_command_line;
 259         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 260
 261         parse_early_param();
 262
 263 #ifdef CONFIG_DUMMY_CONSOLE
 264         conswitchp = &dummy_con;
 265 #endif
 266
 267         switch (m68k_machtype) {
 268 #ifdef CONFIG_AMIGA
 269         case MACH_AMIGA:
 270                 config_amiga();
 271                 break;
 272 #endif
 273 #ifdef CONFIG_ATARI
 274         case MACH_ATARI:
 275                 config_atari();
 276                 break;
 277 #endif
 278 #ifdef CONFIG_MAC
 279         case MACH_MAC:
 280                 config_mac();
 281                 break;
 282 #endif
 283 #ifdef CONFIG_SUN3
 284         case MACH_SUN3:
 285                 config_sun3();
 286                 break;
 287 #endif
 288 #ifdef CONFIG_APOLLO
 289         case MACH_APOLLO:
 290                 config_apollo();
 291                 break;
 292 #endif
 293 #ifdef CONFIG_MVME147
 294         case MACH_MVME147:
 295                 config_mvme147();
 296                 break;
 297 #endif
 298 #ifdef CONFIG_MVME16x
 299         case MACH_MVME16x:
 300                 config_mvme16x();
 301                 break;
 302 #endif
 303 #ifdef CONFIG_BVME6000
 304         case MACH_BVME6000:
 305                 config_bvme6000();
 306                 break;
 307 #endif
 308 #ifdef CONFIG_HP300
 309         case MACH_HP300:
 310                 config_hp300();
 311                 break;
 312 #endif
 313 #ifdef CONFIG_Q40
 314         case MACH_Q40:
 315                 config_q40();
 316                 break;
 317 #endif
 318 #ifdef CONFIG_SUN3X
 319         case MACH_SUN3X:
 320                 config_sun3x();
 321                 break;
 322 #endif
 323         default:
 324                 panic("No configuration setup");
 325         }
 326
 327         paging_init();
 328
 329 #ifndef CONFIG_SUN3
 330         for (i = 1; i < m68k_num_memory; i++)
 331                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 332                                   m68k_memory[i].size);
 333 #ifdef CONFIG_BLK_DEV_INITRD
 334         if (m68k_ramdisk.size) {
 335                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 336                                      m68k_ramdisk.addr, m68k_ramdisk.size,
 337                                      BOOTMEM_DEFAULT);
 338                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 339                 initrd_end = initrd_start + m68k_ramdisk.size;
 340                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 341         }
 342 #endif
 343
 344 #ifdef CONFIG_ATARI
 345         if (MACH_IS_ATARI)
 346                 atari_stram_reserve_pages((void *)availmem);
 347 #endif
 348 #ifdef CONFIG_SUN3X
 349         if (MACH_IS_SUN3X) {
 350                 dvma_init();
 351         }
 352 #endif
 353
 354 #endif /* !CONFIG_SUN3 */
 355
 356 /* set ISA defs early as possible */
 357 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 358         if (MACH_IS_Q40) {
 359                 isa_type = ISA_TYPE_Q40;
 360                 isa_sex = 0;
 361         }
 362 #ifdef CONFIG_GG2
 363         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
 364                 isa_type = ISA_TYPE_GG2;
 365                 isa_sex = 0;
 366         }
 367 #endif
 368 #ifdef CONFIG_AMIGA_PCMCIA
 369         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 370                 isa_type = ISA_TYPE_AG;
 371                 isa_sex = 1;
 372         }
 373 #endif
 374 #endif
 375 }
 376
 377 static int show_cpuinfo(struct seq_file *m, void *v)
 378 {
 379         const char *cpu, *mmu, *fpu;
 380         unsigned long clockfreq, clockfactor;
 381
 382 #define LOOP_CYCLES_68020       (8)
 383 #define LOOP_CYCLES_68030       (8)
 384 #define LOOP_CYCLES_68040       (3)
 385 #define LOOP_CYCLES_68060       (1)
 386
 387         if (CPU_IS_020) {
 388                 cpu = "68020";
 389                 clockfactor = LOOP_CYCLES_68020;
 390         } else if (CPU_IS_030) {
 391                 cpu = "68030";
 392                 clockfactor = LOOP_CYCLES_68030;
 393         } else if (CPU_IS_040) {
 394                 cpu = "68040";
 395                 clockfactor = LOOP_CYCLES_68040;
 396         } else if (CPU_IS_060) {
 397                 cpu = "68060";
 398                 clockfactor = LOOP_CYCLES_68060;
 399         } else {
 400                 cpu = "680x0";
 401                 clockfactor = 0;
 402         }
 403
 404 #ifdef CONFIG_M68KFPU_EMU_ONLY
 405         fpu = "none(soft float)";
 406 #else
 407         if (m68k_fputype & FPU_68881)
 408                 fpu = "68881";
 409         else if (m68k_fputype & FPU_68882)
 410                 fpu = "68882";
 411         else if (m68k_fputype & FPU_68040)
 412                 fpu = "68040";
 413         else if (m68k_fputype & FPU_68060)
 414                 fpu = "68060";
 415         else if (m68k_fputype & FPU_SUNFPA)
 416                 fpu = "Sun FPA";
 417         else
 418                 fpu = "none";
 419 #endif
 420
 421         if (m68k_mmutype & MMU_68851)
 422                 mmu = "68851";
 423         else if (m68k_mmutype & MMU_68030)
 424                 mmu = "68030";
 425         else if (m68k_mmutype & MMU_68040)
 426                 mmu = "68040";
 427         else if (m68k_mmutype & MMU_68060)
 428                 mmu = "68060";
 429         else if (m68k_mmutype & MMU_SUN3)
 430                 mmu = "Sun-3";
 431         else if (m68k_mmutype & MMU_APOLLO)
 432                 mmu = "Apollo";
 433         else
 434                 mmu = "unknown";
 435
 436         clockfreq = loops_per_jiffy * HZ * clockfactor;
 437
 438         seq_printf(m, "CPU:\t\t%s\n"
 439                    "MMU:\t\t%s\n"
 440                    "FPU:\t\t%s\n"
 441                    "Clocking:\t%lu.%1luMHz\n"
 442                    "BogoMips:\t%lu.%02lu\n"
 443                    "Calibration:\t%lu loops\n",
 444                    cpu, mmu, fpu,
 445                    clockfreq/1000000,(clockfreq/100000)%10,
 446                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 447                    loops_per_jiffy);
 448         return 0;
 449 }
 450
 451 static void *c_start(struct seq_file *m, loff_t *pos)
 452 {
 453         return *pos < 1 ? (void *)1 : NULL;
 454 }
 455 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 456 {
 457         ++*pos;
 458         return NULL;
 459 }
 460 static void c_stop(struct seq_file *m, void *v)
 461 {
 462 }
 463 const struct seq_operations cpuinfo_op = {
 464         .start  = c_start,
 465         .next   = c_next,
 466         .stop   = c_stop,
 467         .show   = show_cpuinfo,
 468 };
 469
 470 int get_hardware_list(char *buffer)
 471 {
 472         int len = 0;
 473         char model[80];
 474         unsigned long mem;
 475         int i;
 476
 477         if (mach_get_model)
 478                 mach_get_model(model);
 479         else
 480                 strcpy(model, "Unknown m68k");
 481
 482         len += sprintf(buffer + len, "Model:\t\t%s\n", model);
 483         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 484                 mem += m68k_memory[i].size;
 485         len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
 486
 487         if (mach_get_hardware_list)
 488                 len += mach_get_hardware_list(buffer + len);
 489
 490         return len;
 491 }
 492
 493 void check_bugs(void)
 494 {
 495 #ifndef CONFIG_M68KFPU_EMU
 496         if (m68k_fputype == 0) {
 497                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 498                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 499                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 500                         "emulation project\n");
 501                 panic("no FPU");
 502         }
 503 #endif /* !CONFIG_M68KFPU_EMU */
 504 }
 505
 506 #ifdef CONFIG_ADB
 507 static int __init adb_probe_sync_enable (char *str) {
 508         extern int __adb_probe_sync;
 509         __adb_probe_sync = 1;
 510         return 1;
 511 }
 512
 513 __setup("adb_sync", adb_probe_sync_enable);
 514 #endif /* CONFIG_ADB */