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 char m68k_debug_device[6] = "";
  75 EXPORT_SYMBOL(m68k_debug_device);
  76
  77 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  78 /* machine dependent irq functions */
  79 void (*mach_init_IRQ) (void) __initdata = NULL;
  80 void (*mach_get_model) (char *model);
  81 int (*mach_get_hardware_list) (char *buffer);
  82 /* machine dependent timer functions */
  83 unsigned long (*mach_gettimeoffset) (void);
  84 int (*mach_hwclk) (int, struct rtc_time*);
  85 EXPORT_SYMBOL(mach_hwclk);
  86 int (*mach_set_clock_mmss) (unsigned long);
  87 unsigned int (*mach_get_ss)(void);
  88 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  89 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  90 EXPORT_SYMBOL(mach_get_ss);
  91 EXPORT_SYMBOL(mach_get_rtc_pll);
  92 EXPORT_SYMBOL(mach_set_rtc_pll);
  93 void (*mach_reset)( void );
  94 void (*mach_halt)( void );
  95 void (*mach_power_off)( void );
  96 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
  97 #ifdef CONFIG_HEARTBEAT
  98 void (*mach_heartbeat) (int);
  99 EXPORT_SYMBOL(mach_heartbeat);
 100 #endif
 101 #ifdef CONFIG_M68K_L2_CACHE
 102 void (*mach_l2_flush) (int);
 103 #endif
 104 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 105 void (*mach_beep)(unsigned int, unsigned int);
 106 EXPORT_SYMBOL(mach_beep);
 107 #endif
 108 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 109 int isa_type;
 110 int isa_sex;
 111 EXPORT_SYMBOL(isa_type);
 112 EXPORT_SYMBOL(isa_sex);
 113 #endif
 114
 115 extern int amiga_parse_bootinfo(const struct bi_record *);
 116 extern int atari_parse_bootinfo(const struct bi_record *);
 117 extern int mac_parse_bootinfo(const struct bi_record *);
 118 extern int q40_parse_bootinfo(const struct bi_record *);
 119 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 120 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 121 extern int mvme147_parse_bootinfo(const struct bi_record *);
 122 extern int hp300_parse_bootinfo(const struct bi_record *);
 123
 124 extern void config_amiga(void);
 125 extern void config_atari(void);
 126 extern void config_mac(void);
 127 extern void config_sun3(void);
 128 extern void config_apollo(void);
 129 extern void config_mvme147(void);
 130 extern void config_mvme16x(void);
 131 extern void config_bvme6000(void);
 132 extern void config_hp300(void);
 133 extern void config_q40(void);
 134 extern void config_sun3x(void);
 135
 136 extern void mac_debugging_short (int, short);
 137 extern void mac_debugging_long  (int, long);
 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         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, sizeof(m68k_command_line));
 172                 break;
 173
 174             default:
 175                 if (MACH_IS_AMIGA)
 176                     unknown = amiga_parse_bootinfo(record);
 177                 else if (MACH_IS_ATARI)
 178                     unknown = atari_parse_bootinfo(record);
 179                 else if (MACH_IS_MAC)
 180                     unknown = mac_parse_bootinfo(record);
 181                 else if (MACH_IS_Q40)
 182                     unknown = q40_parse_bootinfo(record);
 183                 else if (MACH_IS_BVME6000)
 184                     unknown = bvme6000_parse_bootinfo(record);
 185                 else if (MACH_IS_MVME16x)
 186                     unknown = mvme16x_parse_bootinfo(record);
 187                 else if (MACH_IS_MVME147)
 188                     unknown = mvme147_parse_bootinfo(record);
 189                 else if (MACH_IS_HP300)
 190                     unknown = hp300_parse_bootinfo(record);
 191                 else
 192                     unknown = 1;
 193         }
 194         if (unknown)
 195             printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 196                    record->tag);
 197         record = (struct bi_record *)((unsigned long)record+record->size);
 198     }
 199
 200     m68k_realnum_memory = m68k_num_memory;
 201 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 202     if (m68k_num_memory > 1) {
 203         printk("Ignoring last %i chunks of physical memory\n",
 204                (m68k_num_memory - 1));
 205         m68k_num_memory = 1;
 206     }
 207     m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
 208 #endif
 209 }
 210
 211 void __init setup_arch(char **cmdline_p)
 212 {
 213         extern int _etext, _edata, _end;
 214 #ifndef CONFIG_SUN3
 215         unsigned long endmem, startmem;
 216 #endif
 217         int i;
 218         char *p, *q;
 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(saved_command_line, *cmdline_p, CL_SIZE);
 260
 261         /* Parse the command line for arch-specific options.
 262          * For the m68k, this is currently only "debug=xxx" to enable printing
 263          * certain kernel messages to some machine-specific device.
 264          */
 265         for( p = *cmdline_p; p && *p; ) {
 266             i = 0;
 267             if (!strncmp( p, "debug=", 6 )) {
 268                 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
 269                 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
 270                 i = 1;
 271             }
 272 #ifdef CONFIG_ATARI
 273             /* This option must be parsed very early */
 274             if (!strncmp( p, "switches=", 9 )) {
 275                 extern void atari_switches_setup( const char *, int );
 276                 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
 277                                            (q - (p+9)) : strlen(p+9) );
 278                 i = 1;
 279             }
 280 #endif
 281
 282             if (i) {
 283                 /* option processed, delete it */
 284                 if ((q = strchr( p, ' ' )))
 285                     strcpy( p, q+1 );
 286                 else
 287                     *p = 0;
 288             } else {
 289                 if ((p = strchr( p, ' ' ))) ++p;
 290             }
 291         }
 292
 293 #ifdef CONFIG_DUMMY_CONSOLE
 294         conswitchp = &dummy_con;
 295 #endif
 296
 297         switch (m68k_machtype) {
 298 #ifdef CONFIG_AMIGA
 299             case MACH_AMIGA:
 300                 config_amiga();
 301                 break;
 302 #endif
 303 #ifdef CONFIG_ATARI
 304             case MACH_ATARI:
 305                 config_atari();
 306                 break;
 307 #endif
 308 #ifdef CONFIG_MAC
 309             case MACH_MAC:
 310                 config_mac();
 311                 break;
 312 #endif
 313 #ifdef CONFIG_SUN3
 314             case MACH_SUN3:
 315                 config_sun3();
 316                 break;
 317 #endif
 318 #ifdef CONFIG_APOLLO
 319             case MACH_APOLLO:
 320                 config_apollo();
 321                 break;
 322 #endif
 323 #ifdef CONFIG_MVME147
 324             case MACH_MVME147:
 325                 config_mvme147();
 326                 break;
 327 #endif
 328 #ifdef CONFIG_MVME16x
 329             case MACH_MVME16x:
 330                 config_mvme16x();
 331                 break;
 332 #endif
 333 #ifdef CONFIG_BVME6000
 334             case MACH_BVME6000:
 335                 config_bvme6000();
 336                 break;
 337 #endif
 338 #ifdef CONFIG_HP300
 339             case MACH_HP300:
 340                 config_hp300();
 341                 break;
 342 #endif
 343 #ifdef CONFIG_Q40
 344             case MACH_Q40:
 345                 config_q40();
 346                 break;
 347 #endif
 348 #ifdef CONFIG_SUN3X
 349             case MACH_SUN3X:
 350                 config_sun3x();
 351                 break;
 352 #endif
 353             default:
 354                 panic ("No configuration setup");
 355         }
 356
 357 #ifndef CONFIG_SUN3
 358         startmem= m68k_memory[0].addr;
 359         endmem = startmem + m68k_memory[0].size;
 360         high_memory = (void *)PAGE_OFFSET;
 361         for (i = 0; i < m68k_num_memory; i++) {
 362                 m68k_memory[i].size &= MASK_256K;
 363                 if (m68k_memory[i].addr < startmem)
 364                         startmem = m68k_memory[i].addr;
 365                 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
 366                         endmem = m68k_memory[i].addr+m68k_memory[i].size;
 367                 high_memory += m68k_memory[i].size;
 368         }
 369
 370         availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
 371                                       startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
 372
 373         for (i = 0; i < m68k_num_memory; i++)
 374                 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
 375
 376         reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
 377
 378 #ifdef CONFIG_BLK_DEV_INITRD
 379         if (m68k_ramdisk.size) {
 380                 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
 381                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 382                 initrd_end = initrd_start + m68k_ramdisk.size;
 383                 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 384         }
 385 #endif
 386
 387 #ifdef CONFIG_ATARI
 388         if (MACH_IS_ATARI)
 389                 atari_stram_reserve_pages((void *)availmem);
 390 #endif
 391 #ifdef CONFIG_SUN3X
 392         if (MACH_IS_SUN3X) {
 393                 dvma_init();
 394         }
 395 #endif
 396
 397 #endif /* !CONFIG_SUN3 */
 398
 399         paging_init();
 400
 401 /* set ISA defs early as possible */
 402 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 403 #if defined(CONFIG_Q40)
 404         if (MACH_IS_Q40) {
 405             isa_type = Q40_ISA;
 406             isa_sex = 0;
 407         }
 408 #elif defined(CONFIG_GG2)
 409         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
 410             isa_type = GG2_ISA;
 411             isa_sex = 0;
 412         }
 413 #elif defined(CONFIG_AMIGA_PCMCIA)
 414         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
 415             isa_type = AG_ISA;
 416             isa_sex = 1;
 417         }
 418 #endif
 419 #endif
 420 }
 421
 422 static int show_cpuinfo(struct seq_file *m, void *v)
 423 {
 424     const char *cpu, *mmu, *fpu;
 425     unsigned long clockfreq, clockfactor;
 426
 427 #define LOOP_CYCLES_68020       (8)
 428 #define LOOP_CYCLES_68030       (8)
 429 #define LOOP_CYCLES_68040       (3)
 430 #define LOOP_CYCLES_68060       (1)
 431
 432     if (CPU_IS_020) {
 433         cpu = "68020";
 434         clockfactor = LOOP_CYCLES_68020;
 435     } else if (CPU_IS_030) {
 436         cpu = "68030";
 437         clockfactor = LOOP_CYCLES_68030;
 438     } else if (CPU_IS_040) {
 439         cpu = "68040";
 440         clockfactor = LOOP_CYCLES_68040;
 441     } else if (CPU_IS_060) {
 442         cpu = "68060";
 443         clockfactor = LOOP_CYCLES_68060;
 444     } else {
 445         cpu = "680x0";
 446         clockfactor = 0;
 447     }
 448
 449 #ifdef CONFIG_M68KFPU_EMU_ONLY
 450     fpu="none(soft float)";
 451 #else
 452     if (m68k_fputype & FPU_68881)
 453         fpu = "68881";
 454     else if (m68k_fputype & FPU_68882)
 455         fpu = "68882";
 456     else if (m68k_fputype & FPU_68040)
 457         fpu = "68040";
 458     else if (m68k_fputype & FPU_68060)
 459         fpu = "68060";
 460     else if (m68k_fputype & FPU_SUNFPA)
 461         fpu = "Sun FPA";
 462     else
 463         fpu = "none";
 464 #endif
 465
 466     if (m68k_mmutype & MMU_68851)
 467         mmu = "68851";
 468     else if (m68k_mmutype & MMU_68030)
 469         mmu = "68030";
 470     else if (m68k_mmutype & MMU_68040)
 471         mmu = "68040";
 472     else if (m68k_mmutype & MMU_68060)
 473         mmu = "68060";
 474     else if (m68k_mmutype & MMU_SUN3)
 475         mmu = "Sun-3";
 476     else if (m68k_mmutype & MMU_APOLLO)
 477         mmu = "Apollo";
 478     else
 479         mmu = "unknown";
 480
 481     clockfreq = loops_per_jiffy*HZ*clockfactor;
 482
 483     seq_printf(m, "CPU:\t\t%s\n"
 484                    "MMU:\t\t%s\n"
 485                    "FPU:\t\t%s\n"
 486                    "Clocking:\t%lu.%1luMHz\n"
 487                    "BogoMips:\t%lu.%02lu\n"
 488                    "Calibration:\t%lu loops\n",
 489                    cpu, mmu, fpu,
 490                    clockfreq/1000000,(clockfreq/100000)%10,
 491                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 492                    loops_per_jiffy);
 493     return 0;
 494 }
 495
 496 static void *c_start(struct seq_file *m, loff_t *pos)
 497 {
 498         return *pos < 1 ? (void *)1 : NULL;
 499 }
 500 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 501 {
 502         ++*pos;
 503         return NULL;
 504 }
 505 static void c_stop(struct seq_file *m, void *v)
 506 {
 507 }
 508 struct seq_operations cpuinfo_op = {
 509         .start =        c_start,
 510         .next =         c_next,
 511         .stop =         c_stop,
 512         .show =         show_cpuinfo,
 513 };
 514
 515 int get_hardware_list(char *buffer)
 516 {
 517     int len = 0;
 518     char model[80];
 519     unsigned long mem;
 520     int i;
 521
 522     if (mach_get_model)
 523         mach_get_model(model);
 524     else
 525         strcpy(model, "Unknown m68k");
 526
 527     len += sprintf(buffer+len, "Model:\t\t%s\n", model);
 528     for (mem = 0, i = 0; i < m68k_num_memory; i++)
 529         mem += m68k_memory[i].size;
 530     len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
 531
 532     if (mach_get_hardware_list)
 533         len += mach_get_hardware_list(buffer+len);
 534
 535     return(len);
 536 }
 537
 538 void check_bugs(void)
 539 {
 540 #ifndef CONFIG_M68KFPU_EMU
 541         if (m68k_fputype == 0) {
 542                 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 543                                 "WHICH IS REQUIRED BY LINUX/M68K ***\n" );
 544                 printk( KERN_EMERG "Upgrade your hardware or join the FPU "
 545                                 "emulation project\n" );
 546                 panic( "no FPU" );
 547         }
 548 #endif /* !CONFIG_M68KFPU_EMU */
 549 }