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