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/irq.h>
  30 #include <asm/io.h>
  31 #include <asm/machdep.h>
  32 #ifdef CONFIG_AMIGA
  33 #include <asm/amigahw.h>
  34 #endif
  35 #ifdef CONFIG_ATARI
  36 #include <asm/atarihw.h>
  37 #include <asm/atari_stram.h>
  38 #endif
  39 #ifdef CONFIG_SUN3X
  40 #include <asm/dvma.h>
  41 #endif
  42
  43 unsigned long m68k_machtype;
  44 unsigned long m68k_cputype;
  45 EXPORT_SYMBOL(m68k_machtype);
  46 EXPORT_SYMBOL(m68k_cputype);
  47 unsigned long m68k_fputype;
  48 unsigned long m68k_mmutype;
  49 #ifdef CONFIG_VME
  50 unsigned long vme_brdtype;
  51 EXPORT_SYMBOL(vme_brdtype);
  52 #endif
  53
  54 int m68k_is040or060;
  55 EXPORT_SYMBOL(m68k_is040or060);
  56
  57 extern int end;
  58 extern unsigned long availmem;
  59
  60 int m68k_num_memory;
  61 EXPORT_SYMBOL(m68k_num_memory);
  62 int m68k_realnum_memory;
  63 EXPORT_SYMBOL(m68k_realnum_memory);
  64 unsigned long m68k_memoffset;
  65 EXPORT_SYMBOL(m68k_memoffset);
  66 struct mem_info m68k_memory[NUM_MEMINFO];
  67 EXPORT_SYMBOL(m68k_memory);
  68
  69 struct mem_info m68k_ramdisk;
  70
  71 static char m68k_command_line[CL_SIZE];
  72
  73 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  74 /* machine dependent irq functions */
  75 void (*mach_init_IRQ) (void) __initdata = NULL;
  76 void (*mach_get_model) (char *model);
  77 int (*mach_get_hardware_list) (char *buffer);
  78 /* machine dependent timer functions */
  79 unsigned long (*mach_gettimeoffset) (void);
  80 int (*mach_hwclk) (int, struct rtc_time*);
  81 EXPORT_SYMBOL(mach_hwclk);
  82 int (*mach_set_clock_mmss) (unsigned long);
  83 unsigned int (*mach_get_ss)(void);
  84 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  85 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  86 EXPORT_SYMBOL(mach_get_ss);
  87 EXPORT_SYMBOL(mach_get_rtc_pll);
  88 EXPORT_SYMBOL(mach_set_rtc_pll);
  89 void (*mach_reset)( void );
  90 void (*mach_halt)( void );
  91 void (*mach_power_off)( void );
  92 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
  93 #ifdef CONFIG_HEARTBEAT
  94 void (*mach_heartbeat) (int);
  95 EXPORT_SYMBOL(mach_heartbeat);
  96 #endif
  97 #ifdef CONFIG_M68K_L2_CACHE
  98 void (*mach_l2_flush) (int);
  99 #endif
 100 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 101 void (*mach_beep)(unsigned int, unsigned int);
 102 EXPORT_SYMBOL(mach_beep);
 103 #endif
 104 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 105 int isa_type;
 106 int isa_sex;
 107 EXPORT_SYMBOL(isa_type);
 108 EXPORT_SYMBOL(isa_sex);
 109 #endif
 110
 111 extern int amiga_parse_bootinfo(const struct bi_record *);
 112 extern int atari_parse_bootinfo(const struct bi_record *);
 113 extern int mac_parse_bootinfo(const struct bi_record *);
 114 extern int q40_parse_bootinfo(const struct bi_record *);
 115 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 116 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 117 extern int mvme147_parse_bootinfo(const struct bi_record *);
 118 extern int hp300_parse_bootinfo(const struct bi_record *);
 119
 120 extern void config_amiga(void);
 121 extern void config_atari(void);
 122 extern void config_mac(void);
 123 extern void config_sun3(void);
 124 extern void config_apollo(void);
 125 extern void config_mvme147(void);
 126 extern void config_mvme16x(void);
 127 extern void config_bvme6000(void);
 128 extern void config_hp300(void);
 129 extern void config_q40(void);
 130 extern void config_sun3x(void);
 131
 132 #define MASK_256K 0xfffc0000
 133
 134 extern void paging_init(void);
 135
 136 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 137 {
 138         while (record->tag != BI_LAST) {
 139                 int unknown = 0;
 140                 const unsigned long *data = record->data;
 141
 142                 switch (record->tag) {
 143                 case BI_MACHTYPE:
 144                 case BI_CPUTYPE:
 145                 case BI_FPUTYPE:
 146                 case BI_MMUTYPE:
 147                         /* Already set up by head.S */
 148                         break;
 149
 150                 case BI_MEMCHUNK:
 151                         if (m68k_num_memory < NUM_MEMINFO) {
 152                                 m68k_memory[m68k_num_memory].addr = data[0];
 153                                 m68k_memory[m68k_num_memory].size = data[1];
 154                                 m68k_num_memory++;
 155                         } else
 156                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 157                         break;
 158
 159                 case BI_RAMDISK:
 160                         m68k_ramdisk.addr = data[0];
 161                         m68k_ramdisk.size = data[1];
 162                         break;
 163
 164                 case BI_COMMAND_LINE:
 165                         strlcpy(m68k_command_line, (const char *)data,
 166                                 sizeof(m68k_command_line));
 167                         break;
 168
 169                 default:
 170                         if (MACH_IS_AMIGA)
 171                                 unknown = amiga_parse_bootinfo(record);
 172                         else if (MACH_IS_ATARI)
 173                                 unknown = atari_parse_bootinfo(record);
 174                         else if (MACH_IS_MAC)
 175                                 unknown = mac_parse_bootinfo(record);
 176                         else if (MACH_IS_Q40)
 177                                 unknown = q40_parse_bootinfo(record);
 178                         else if (MACH_IS_BVME6000)
 179                                 unknown = bvme6000_parse_bootinfo(record);
 180                         else if (MACH_IS_MVME16x)
 181                                 unknown = mvme16x_parse_bootinfo(record);
 182                         else if (MACH_IS_MVME147)
 183                                 unknown = mvme147_parse_bootinfo(record);
 184                         else if (MACH_IS_HP300)
 185                                 unknown = hp300_parse_bootinfo(record);
 186                         else
 187                                 unknown = 1;
 188                 }
 189                 if (unknown)
 190                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 191                                record->tag);
 192                 record = (struct bi_record *)((unsigned long)record +
 193                                               record->size);
 194         }
 195
 196         m68k_realnum_memory = m68k_num_memory;
 197 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 198         if (m68k_num_memory > 1) {
 199                 printk("Ignoring last %i chunks of physical memory\n",
 200                        (m68k_num_memory - 1));
 201                 m68k_num_memory = 1;
 202         }
 203         m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
 204 #endif
 205 }
 206
 207 void __init setup_arch(char **cmdline_p)
 208 {
 209         extern int _etext, _edata, _end;
 210         int i;
 211
 212         /* The bootinfo is located right after the kernel bss */
 213         m68k_parse_bootinfo((const struct bi_record *)&_end);
 214
 215         if (CPU_IS_040)
 216                 m68k_is040or060 = 4;
 217         else if (CPU_IS_060)
 218                 m68k_is040or060 = 6;
 219
 220         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 221          * be confused by software FPU emulation. BEWARE.
 222          * We should really do our own FPU check at startup.
 223          * [what do we do with buggy 68LC040s? if we have problems
 224          *  with them, we should add a test to check_bugs() below] */
 225 #ifndef CONFIG_M68KFPU_EMU_ONLY
 226         /* clear the fpu if we have one */
 227         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 228                 volatile int zero = 0;
 229                 asm volatile ("frestore %0" : : "m" (zero));
 230         }
 231 #endif
 232
 233         if (CPU_IS_060) {
 234                 u32 pcr;
 235
 236                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 237                      : "=d" (pcr));
 238                 if (((pcr >> 8) & 0xff) <= 5) {
 239                         printk("Enabling workaround for errata I14\n");
 240                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 241                              : : "d" (pcr | 0x20));
 242                 }
 243         }
 244
 245         init_mm.start_code = PAGE_OFFSET;
 246         init_mm.end_code = (unsigned long) &_etext;
 247         init_mm.end_data = (unsigned long) &_edata;
 248         init_mm.brk = (unsigned long) &_end;
 249
 250         *cmdline_p = m68k_command_line;
 251         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 252
 253         parse_early_param();
 254
 255 #ifdef CONFIG_DUMMY_CONSOLE
 256         conswitchp = &dummy_con;
 257 #endif
 258
 259         switch (m68k_machtype) {
 260 #ifdef CONFIG_AMIGA
 261         case MACH_AMIGA:
 262                 config_amiga();
 263                 break;
 264 #endif
 265 #ifdef CONFIG_ATARI
 266         case MACH_ATARI:
 267                 config_atari();
 268                 break;
 269 #endif
 270 #ifdef CONFIG_MAC
 271         case MACH_MAC:
 272                 config_mac();
 273                 break;
 274 #endif
 275 #ifdef CONFIG_SUN3
 276         case MACH_SUN3:
 277                 config_sun3();
 278                 break;
 279 #endif
 280 #ifdef CONFIG_APOLLO
 281         case MACH_APOLLO:
 282                 config_apollo();
 283                 break;
 284 #endif
 285 #ifdef CONFIG_MVME147
 286         case MACH_MVME147:
 287                 config_mvme147();
 288                 break;
 289 #endif
 290 #ifdef CONFIG_MVME16x
 291         case MACH_MVME16x:
 292                 config_mvme16x();
 293                 break;
 294 #endif
 295 #ifdef CONFIG_BVME6000
 296         case MACH_BVME6000:
 297                 config_bvme6000();
 298                 break;
 299 #endif
 300 #ifdef CONFIG_HP300
 301         case MACH_HP300:
 302                 config_hp300();
 303                 break;
 304 #endif
 305 #ifdef CONFIG_Q40
 306         case MACH_Q40:
 307                 config_q40();
 308                 break;
 309 #endif
 310 #ifdef CONFIG_SUN3X
 311         case MACH_SUN3X:
 312                 config_sun3x();
 313                 break;
 314 #endif
 315         default:
 316                 panic("No configuration setup");
 317         }
 318
 319         paging_init();
 320
 321 #ifndef CONFIG_SUN3
 322         for (i = 1; i < m68k_num_memory; i++)
 323                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 324                                   m68k_memory[i].size);
 325 #ifdef CONFIG_BLK_DEV_INITRD
 326         if (m68k_ramdisk.size) {
 327                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 328                                      m68k_ramdisk.addr, m68k_ramdisk.size);
 329                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 330                 initrd_end = initrd_start + m68k_ramdisk.size;
 331                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 332         }
 333 #endif
 334
 335 #ifdef CONFIG_ATARI
 336         if (MACH_IS_ATARI)
 337                 atari_stram_reserve_pages((void *)availmem);
 338 #endif
 339 #ifdef CONFIG_SUN3X
 340         if (MACH_IS_SUN3X) {
 341                 dvma_init();
 342         }
 343 #endif
 344
 345 #endif /* !CONFIG_SUN3 */
 346
 347 /* set ISA defs early as possible */
 348 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 349 #if defined(CONFIG_Q40)
 350         if (MACH_IS_Q40) {
 351                 isa_type = Q40_ISA;
 352                 isa_sex = 0;
 353         }
 354 #elif defined(CONFIG_GG2)
 355         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
 356                 isa_type = GG2_ISA;
 357                 isa_sex = 0;
 358         }
 359 #elif defined(CONFIG_AMIGA_PCMCIA)
 360         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 361                 isa_type = AG_ISA;
 362                 isa_sex = 1;
 363         }
 364 #endif
 365 #endif
 366 }
 367
 368 static int show_cpuinfo(struct seq_file *m, void *v)
 369 {
 370         const char *cpu, *mmu, *fpu;
 371         unsigned long clockfreq, clockfactor;
 372
 373 #define LOOP_CYCLES_68020       (8)
 374 #define LOOP_CYCLES_68030       (8)
 375 #define LOOP_CYCLES_68040       (3)
 376 #define LOOP_CYCLES_68060       (1)
 377
 378         if (CPU_IS_020) {
 379                 cpu = "68020";
 380                 clockfactor = LOOP_CYCLES_68020;
 381         } else if (CPU_IS_030) {
 382                 cpu = "68030";
 383                 clockfactor = LOOP_CYCLES_68030;
 384         } else if (CPU_IS_040) {
 385                 cpu = "68040";
 386                 clockfactor = LOOP_CYCLES_68040;
 387         } else if (CPU_IS_060) {
 388                 cpu = "68060";
 389                 clockfactor = LOOP_CYCLES_68060;
 390         } else {
 391                 cpu = "680x0";
 392                 clockfactor = 0;
 393         }
 394
 395 #ifdef CONFIG_M68KFPU_EMU_ONLY
 396         fpu = "none(soft float)";
 397 #else
 398         if (m68k_fputype & FPU_68881)
 399                 fpu = "68881";
 400         else if (m68k_fputype & FPU_68882)
 401                 fpu = "68882";
 402         else if (m68k_fputype & FPU_68040)
 403                 fpu = "68040";
 404         else if (m68k_fputype & FPU_68060)
 405                 fpu = "68060";
 406         else if (m68k_fputype & FPU_SUNFPA)
 407                 fpu = "Sun FPA";
 408         else
 409                 fpu = "none";
 410 #endif
 411
 412         if (m68k_mmutype & MMU_68851)
 413                 mmu = "68851";
 414         else if (m68k_mmutype & MMU_68030)
 415                 mmu = "68030";
 416         else if (m68k_mmutype & MMU_68040)
 417                 mmu = "68040";
 418         else if (m68k_mmutype & MMU_68060)
 419                 mmu = "68060";
 420         else if (m68k_mmutype & MMU_SUN3)
 421                 mmu = "Sun-3";
 422         else if (m68k_mmutype & MMU_APOLLO)
 423                 mmu = "Apollo";
 424         else
 425                 mmu = "unknown";
 426
 427         clockfreq = loops_per_jiffy * HZ * clockfactor;
 428
 429         seq_printf(m, "CPU:\t\t%s\n"
 430                    "MMU:\t\t%s\n"
 431                    "FPU:\t\t%s\n"
 432                    "Clocking:\t%lu.%1luMHz\n"
 433                    "BogoMips:\t%lu.%02lu\n"
 434                    "Calibration:\t%lu loops\n",
 435                    cpu, mmu, fpu,
 436                    clockfreq/1000000,(clockfreq/100000)%10,
 437                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 438                    loops_per_jiffy);
 439         return 0;
 440 }
 441
 442 static void *c_start(struct seq_file *m, loff_t *pos)
 443 {
 444         return *pos < 1 ? (void *)1 : NULL;
 445 }
 446 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 447 {
 448         ++*pos;
 449         return NULL;
 450 }
 451 static void c_stop(struct seq_file *m, void *v)
 452 {
 453 }
 454 struct seq_operations cpuinfo_op = {
 455         .start  = c_start,
 456         .next   = c_next,
 457         .stop   = c_stop,
 458         .show   = show_cpuinfo,
 459 };
 460
 461 int get_hardware_list(char *buffer)
 462 {
 463         int len = 0;
 464         char model[80];
 465         unsigned long mem;
 466         int i;
 467
 468         if (mach_get_model)
 469                 mach_get_model(model);
 470         else
 471                 strcpy(model, "Unknown m68k");
 472
 473         len += sprintf(buffer + len, "Model:\t\t%s\n", model);
 474         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 475                 mem += m68k_memory[i].size;
 476         len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
 477
 478         if (mach_get_hardware_list)
 479                 len += mach_get_hardware_list(buffer + len);
 480
 481         return len;
 482 }
 483
 484 void check_bugs(void)
 485 {
 486 #ifndef CONFIG_M68KFPU_EMU
 487         if (m68k_fputype == 0) {
 488                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 489                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 490                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 491                         "emulation project\n");
 492                 panic("no FPU");
 493         }
 494 #endif /* !CONFIG_M68KFPU_EMU */
 495 }
 496
 497 #ifdef CONFIG_ADB
 498 static int __init adb_probe_sync_enable (char *str) {
 499         extern int __adb_probe_sync;
 500         __adb_probe_sync = 1;
 501         return 1;
 502 }
 503
 504 __setup("adb_sync", adb_probe_sync_enable);
 505 #endif /* CONFIG_ADB */