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 int m68k_realnum_memory;
  62 EXPORT_SYMBOL(m68k_realnum_memory);
  63 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
  64 unsigned long m68k_memoffset;
  65 EXPORT_SYMBOL(m68k_memoffset);
  66 #endif
  67 struct mem_info m68k_memory[NUM_MEMINFO];
  68 EXPORT_SYMBOL(m68k_memory);
  69
  70 static struct mem_info m68k_ramdisk;
  71
  72 static char m68k_command_line[CL_SIZE];
  73
  74 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  75 /* machine dependent irq functions */
  76 void (*mach_init_IRQ) (void) __initdata = NULL;
  77 void (*mach_get_model) (char *model);
  78 int (*mach_get_hardware_list) (char *buffer);
  79 /* machine dependent timer functions */
  80 unsigned long (*mach_gettimeoffset) (void);
  81 int (*mach_hwclk) (int, struct rtc_time*);
  82 EXPORT_SYMBOL(mach_hwclk);
  83 int (*mach_set_clock_mmss) (unsigned long);
  84 unsigned int (*mach_get_ss)(void);
  85 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  86 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  87 EXPORT_SYMBOL(mach_get_ss);
  88 EXPORT_SYMBOL(mach_get_rtc_pll);
  89 EXPORT_SYMBOL(mach_set_rtc_pll);
  90 void (*mach_reset)( void );
  91 void (*mach_halt)( void );
  92 void (*mach_power_off)( void );
  93 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
  94 #ifdef CONFIG_HEARTBEAT
  95 void (*mach_heartbeat) (int);
  96 EXPORT_SYMBOL(mach_heartbeat);
  97 #endif
  98 #ifdef CONFIG_M68K_L2_CACHE
  99 void (*mach_l2_flush) (int);
 100 #endif
 101 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 102 void (*mach_beep)(unsigned int, unsigned int);
 103 EXPORT_SYMBOL(mach_beep);
 104 #endif
 105 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 106 int isa_type;
 107 int isa_sex;
 108 EXPORT_SYMBOL(isa_type);
 109 EXPORT_SYMBOL(isa_sex);
 110 #endif
 111
 112 extern int amiga_parse_bootinfo(const struct bi_record *);
 113 extern int atari_parse_bootinfo(const struct bi_record *);
 114 extern int mac_parse_bootinfo(const struct bi_record *);
 115 extern int q40_parse_bootinfo(const struct bi_record *);
 116 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 117 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 118 extern int mvme147_parse_bootinfo(const struct bi_record *);
 119 extern int hp300_parse_bootinfo(const struct bi_record *);
 120
 121 extern void config_amiga(void);
 122 extern void config_atari(void);
 123 extern void config_mac(void);
 124 extern void config_sun3(void);
 125 extern void config_apollo(void);
 126 extern void config_mvme147(void);
 127 extern void config_mvme16x(void);
 128 extern void config_bvme6000(void);
 129 extern void config_hp300(void);
 130 extern void config_q40(void);
 131 extern void config_sun3x(void);
 132
 133 #define MASK_256K 0xfffc0000
 134
 135 extern void paging_init(void);
 136
 137 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 138 {
 139         while (record->tag != BI_LAST) {
 140                 int unknown = 0;
 141                 const unsigned long *data = record->data;
 142
 143                 switch (record->tag) {
 144                 case BI_MACHTYPE:
 145                 case BI_CPUTYPE:
 146                 case BI_FPUTYPE:
 147                 case BI_MMUTYPE:
 148                         /* Already set up by head.S */
 149                         break;
 150
 151                 case BI_MEMCHUNK:
 152                         if (m68k_num_memory < NUM_MEMINFO) {
 153                                 m68k_memory[m68k_num_memory].addr = data[0];
 154                                 m68k_memory[m68k_num_memory].size = data[1];
 155                                 m68k_num_memory++;
 156                         } else
 157                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 158                         break;
 159
 160                 case BI_RAMDISK:
 161                         m68k_ramdisk.addr = data[0];
 162                         m68k_ramdisk.size = data[1];
 163                         break;
 164
 165                 case BI_COMMAND_LINE:
 166                         strlcpy(m68k_command_line, (const char *)data,
 167                                 sizeof(m68k_command_line));
 168                         break;
 169
 170                 default:
 171                         if (MACH_IS_AMIGA)
 172                                 unknown = amiga_parse_bootinfo(record);
 173                         else if (MACH_IS_ATARI)
 174                                 unknown = atari_parse_bootinfo(record);
 175                         else if (MACH_IS_MAC)
 176                                 unknown = mac_parse_bootinfo(record);
 177                         else if (MACH_IS_Q40)
 178                                 unknown = q40_parse_bootinfo(record);
 179                         else if (MACH_IS_BVME6000)
 180                                 unknown = bvme6000_parse_bootinfo(record);
 181                         else if (MACH_IS_MVME16x)
 182                                 unknown = mvme16x_parse_bootinfo(record);
 183                         else if (MACH_IS_MVME147)
 184                                 unknown = mvme147_parse_bootinfo(record);
 185                         else if (MACH_IS_HP300)
 186                                 unknown = hp300_parse_bootinfo(record);
 187                         else
 188                                 unknown = 1;
 189                 }
 190                 if (unknown)
 191                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 192                                record->tag);
 193                 record = (struct bi_record *)((unsigned long)record +
 194                                               record->size);
 195         }
 196
 197         m68k_realnum_memory = m68k_num_memory;
 198 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 199         if (m68k_num_memory > 1) {
 200                 printk("Ignoring last %i chunks of physical memory\n",
 201                        (m68k_num_memory - 1));
 202                 m68k_num_memory = 1;
 203         }
 204         m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
 205 #endif
 206 }
 207
 208 void __init setup_arch(char **cmdline_p)
 209 {
 210         extern int _etext, _edata, _end;
 211 #ifndef CONFIG_SUN3
 212         unsigned long endmem, startmem;
 213 #endif
 214         int i;
 215
 216         /* The bootinfo is located right after the kernel bss */
 217         m68k_parse_bootinfo((const struct bi_record *)&_end);
 218
 219         if (CPU_IS_040)
 220                 m68k_is040or060 = 4;
 221         else if (CPU_IS_060)
 222                 m68k_is040or060 = 6;
 223
 224         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 225          * be confused by software FPU emulation. BEWARE.
 226          * We should really do our own FPU check at startup.
 227          * [what do we do with buggy 68LC040s? if we have problems
 228          *  with them, we should add a test to check_bugs() below] */
 229 #ifndef CONFIG_M68KFPU_EMU_ONLY
 230         /* clear the fpu if we have one */
 231         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 232                 volatile int zero = 0;
 233                 asm volatile ("frestore %0" : : "m" (zero));
 234         }
 235 #endif
 236
 237         if (CPU_IS_060) {
 238                 u32 pcr;
 239
 240                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 241                      : "=d" (pcr));
 242                 if (((pcr >> 8) & 0xff) <= 5) {
 243                         printk("Enabling workaround for errata I14\n");
 244                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 245                              : : "d" (pcr | 0x20));
 246                 }
 247         }
 248
 249         init_mm.start_code = PAGE_OFFSET;
 250         init_mm.end_code = (unsigned long) &_etext;
 251         init_mm.end_data = (unsigned long) &_edata;
 252         init_mm.brk = (unsigned long) &_end;
 253
 254         *cmdline_p = m68k_command_line;
 255         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 256
 257         parse_early_param();
 258
 259 #ifdef CONFIG_DUMMY_CONSOLE
 260         conswitchp = &dummy_con;
 261 #endif
 262
 263         switch (m68k_machtype) {
 264 #ifdef CONFIG_AMIGA
 265         case MACH_AMIGA:
 266                 config_amiga();
 267                 break;
 268 #endif
 269 #ifdef CONFIG_ATARI
 270         case MACH_ATARI:
 271                 config_atari();
 272                 break;
 273 #endif
 274 #ifdef CONFIG_MAC
 275         case MACH_MAC:
 276                 config_mac();
 277                 break;
 278 #endif
 279 #ifdef CONFIG_SUN3
 280         case MACH_SUN3:
 281                 config_sun3();
 282                 break;
 283 #endif
 284 #ifdef CONFIG_APOLLO
 285         case MACH_APOLLO:
 286                 config_apollo();
 287                 break;
 288 #endif
 289 #ifdef CONFIG_MVME147
 290         case MACH_MVME147:
 291                 config_mvme147();
 292                 break;
 293 #endif
 294 #ifdef CONFIG_MVME16x
 295         case MACH_MVME16x:
 296                 config_mvme16x();
 297                 break;
 298 #endif
 299 #ifdef CONFIG_BVME6000
 300         case MACH_BVME6000:
 301                 config_bvme6000();
 302                 break;
 303 #endif
 304 #ifdef CONFIG_HP300
 305         case MACH_HP300:
 306                 config_hp300();
 307                 break;
 308 #endif
 309 #ifdef CONFIG_Q40
 310         case MACH_Q40:
 311                 config_q40();
 312                 break;
 313 #endif
 314 #ifdef CONFIG_SUN3X
 315         case MACH_SUN3X:
 316                 config_sun3x();
 317                 break;
 318 #endif
 319         default:
 320                 panic("No configuration setup");
 321         }
 322
 323 #ifndef CONFIG_SUN3
 324         startmem= m68k_memory[0].addr;
 325         endmem = startmem + m68k_memory[0].size;
 326         high_memory = (void *)PAGE_OFFSET;
 327         for (i = 0; i < m68k_num_memory; i++) {
 328                 m68k_memory[i].size &= MASK_256K;
 329                 if (m68k_memory[i].addr < startmem)
 330                         startmem = m68k_memory[i].addr;
 331                 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
 332                         endmem = m68k_memory[i].addr+m68k_memory[i].size;
 333                 high_memory += m68k_memory[i].size;
 334         }
 335
 336         availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
 337                                       startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
 338
 339         for (i = 0; i < m68k_num_memory; i++)
 340                 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
 341
 342         reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
 343
 344 #ifdef CONFIG_BLK_DEV_INITRD
 345         if (m68k_ramdisk.size) {
 346                 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
 347                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 348                 initrd_end = initrd_start + m68k_ramdisk.size;
 349                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 350         }
 351 #endif
 352
 353 #ifdef CONFIG_ATARI
 354         if (MACH_IS_ATARI)
 355                 atari_stram_reserve_pages((void *)availmem);
 356 #endif
 357 #ifdef CONFIG_SUN3X
 358         if (MACH_IS_SUN3X) {
 359                 dvma_init();
 360         }
 361 #endif
 362
 363 #endif /* !CONFIG_SUN3 */
 364
 365         paging_init();
 366
 367 /* set ISA defs early as possible */
 368 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 369 #if defined(CONFIG_Q40)
 370         if (MACH_IS_Q40) {
 371                 isa_type = Q40_ISA;
 372                 isa_sex = 0;
 373         }
 374 #elif defined(CONFIG_GG2)
 375         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
 376                 isa_type = GG2_ISA;
 377                 isa_sex = 0;
 378         }
 379 #elif defined(CONFIG_AMIGA_PCMCIA)
 380         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 381                 isa_type = AG_ISA;
 382                 isa_sex = 1;
 383         }
 384 #endif
 385 #endif
 386 }
 387
 388 static int show_cpuinfo(struct seq_file *m, void *v)
 389 {
 390         const char *cpu, *mmu, *fpu;
 391         unsigned long clockfreq, clockfactor;
 392
 393 #define LOOP_CYCLES_68020       (8)
 394 #define LOOP_CYCLES_68030       (8)
 395 #define LOOP_CYCLES_68040       (3)
 396 #define LOOP_CYCLES_68060       (1)
 397
 398         if (CPU_IS_020) {
 399                 cpu = "68020";
 400                 clockfactor = LOOP_CYCLES_68020;
 401         } else if (CPU_IS_030) {
 402                 cpu = "68030";
 403                 clockfactor = LOOP_CYCLES_68030;
 404         } else if (CPU_IS_040) {
 405                 cpu = "68040";
 406                 clockfactor = LOOP_CYCLES_68040;
 407         } else if (CPU_IS_060) {
 408                 cpu = "68060";
 409                 clockfactor = LOOP_CYCLES_68060;
 410         } else {
 411                 cpu = "680x0";
 412                 clockfactor = 0;
 413         }
 414
 415 #ifdef CONFIG_M68KFPU_EMU_ONLY
 416         fpu = "none(soft float)";
 417 #else
 418         if (m68k_fputype & FPU_68881)
 419                 fpu = "68881";
 420         else if (m68k_fputype & FPU_68882)
 421                 fpu = "68882";
 422         else if (m68k_fputype & FPU_68040)
 423                 fpu = "68040";
 424         else if (m68k_fputype & FPU_68060)
 425                 fpu = "68060";
 426         else if (m68k_fputype & FPU_SUNFPA)
 427                 fpu = "Sun FPA";
 428         else
 429                 fpu = "none";
 430 #endif
 431
 432         if (m68k_mmutype & MMU_68851)
 433                 mmu = "68851";
 434         else if (m68k_mmutype & MMU_68030)
 435                 mmu = "68030";
 436         else if (m68k_mmutype & MMU_68040)
 437                 mmu = "68040";
 438         else if (m68k_mmutype & MMU_68060)
 439                 mmu = "68060";
 440         else if (m68k_mmutype & MMU_SUN3)
 441                 mmu = "Sun-3";
 442         else if (m68k_mmutype & MMU_APOLLO)
 443                 mmu = "Apollo";
 444         else
 445                 mmu = "unknown";
 446
 447         clockfreq = loops_per_jiffy * HZ * clockfactor;
 448
 449         seq_printf(m, "CPU:\t\t%s\n"
 450                    "MMU:\t\t%s\n"
 451                    "FPU:\t\t%s\n"
 452                    "Clocking:\t%lu.%1luMHz\n"
 453                    "BogoMips:\t%lu.%02lu\n"
 454                    "Calibration:\t%lu loops\n",
 455                    cpu, mmu, fpu,
 456                    clockfreq/1000000,(clockfreq/100000)%10,
 457                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 458                    loops_per_jiffy);
 459         return 0;
 460 }
 461
 462 static void *c_start(struct seq_file *m, loff_t *pos)
 463 {
 464         return *pos < 1 ? (void *)1 : NULL;
 465 }
 466 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 467 {
 468         ++*pos;
 469         return NULL;
 470 }
 471 static void c_stop(struct seq_file *m, void *v)
 472 {
 473 }
 474 struct seq_operations cpuinfo_op = {
 475         .start  = c_start,
 476         .next   = c_next,
 477         .stop   = c_stop,
 478         .show   = show_cpuinfo,
 479 };
 480
 481 int get_hardware_list(char *buffer)
 482 {
 483         int len = 0;
 484         char model[80];
 485         unsigned long mem;
 486         int i;
 487
 488         if (mach_get_model)
 489                 mach_get_model(model);
 490         else
 491                 strcpy(model, "Unknown m68k");
 492
 493         len += sprintf(buffer + len, "Model:\t\t%s\n", model);
 494         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 495                 mem += m68k_memory[i].size;
 496         len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
 497
 498         if (mach_get_hardware_list)
 499                 len += mach_get_hardware_list(buffer + len);
 500
 501         return len;
 502 }
 503
 504 void check_bugs(void)
 505 {
 506 #ifndef CONFIG_M68KFPU_EMU
 507         if (m68k_fputype == 0) {
 508                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 509                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 510                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 511                         "emulation project\n");
 512                 panic("no FPU");
 513         }
 514 #endif /* !CONFIG_M68KFPU_EMU */
 515 }
 516
 517 #ifdef CONFIG_ADB
 518 static int __init adb_probe_sync_enable (char *str) {
 519         extern int __adb_probe_sync;
 520         __adb_probe_sync = 1;
 521         return 1;
 522 }
 523
 524 __setup("adb_sync", adb_probe_sync_enable);
 525 #endif /* CONFIG_ADB */