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/config.h>
  12 #include <linux/kernel.h>
  13 #include <linux/mm.h>
  14 #include <linux/sched.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/fs.h>
  18 #include <linux/console.h>
  19 #include <linux/genhd.h>
  20 #include <linux/errno.h>
  21 #include <linux/string.h>
  22 #include <linux/init.h>
  23 #include <linux/bootmem.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/module.h>
  26 #include <linux/initrd.h>
  27
  28 #include <asm/bootinfo.h>
  29 #include <asm/setup.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 unsigned long m68k_machtype;
  45 unsigned long m68k_cputype;
  46 unsigned long m68k_fputype;
  47 unsigned long m68k_mmutype;
  48 #ifdef CONFIG_VME
  49 unsigned long vme_brdtype;
  50 #endif
  51
  52 int m68k_is040or060;
  53
  54 extern int end;
  55 extern unsigned long availmem;
  56
  57 int m68k_num_memory;
  58 int m68k_realnum_memory;
  59 unsigned long m68k_memoffset;
  60 struct mem_info m68k_memory[NUM_MEMINFO];
  61
  62 static struct mem_info m68k_ramdisk;
  63
  64 static char m68k_command_line[CL_SIZE];
  65
  66 char m68k_debug_device[6] = "";
  67
  68 void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *)) __initdata = NULL;
  69 /* machine dependent irq functions */
  70 void (*mach_init_IRQ) (void) __initdata = NULL;
  71 irqreturn_t (*(*mach_default_handler)[]) (int, void *, struct pt_regs *);
  72 void (*mach_get_model) (char *model);
  73 int (*mach_get_hardware_list) (char *buffer);
  74 int (*mach_get_irq_list) (struct seq_file *, void *);
  75 irqreturn_t (*mach_process_int) (int, struct pt_regs *);
  76 /* machine dependent timer functions */
  77 unsigned long (*mach_gettimeoffset) (void);
  78 int (*mach_hwclk) (int, struct rtc_time*);
  79 int (*mach_set_clock_mmss) (unsigned long);
  80 unsigned int (*mach_get_ss)(void);
  81 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  82 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  83 void (*mach_reset)( void );
  84 void (*mach_halt)( void );
  85 void (*mach_power_off)( void );
  86 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
  87 #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
  88 void (*mach_floppy_setup) (char *, int *) __initdata = NULL;
  89 #endif
  90 #ifdef CONFIG_HEARTBEAT
  91 void (*mach_heartbeat) (int);
  92 EXPORT_SYMBOL(mach_heartbeat);
  93 #endif
  94 #ifdef CONFIG_M68K_L2_CACHE
  95 void (*mach_l2_flush) (int);
  96 #endif
  97 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
  98 void (*mach_beep)(unsigned int, unsigned int);
  99 #endif
 100 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 101 int isa_type;
 102 int isa_sex;
 103 #endif
 104
 105 extern int amiga_parse_bootinfo(const struct bi_record *);
 106 extern int atari_parse_bootinfo(const struct bi_record *);
 107 extern int mac_parse_bootinfo(const struct bi_record *);
 108 extern int q40_parse_bootinfo(const struct bi_record *);
 109 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 110 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 111 extern int mvme147_parse_bootinfo(const struct bi_record *);
 112 extern int hp300_parse_bootinfo(const struct bi_record *);
 113
 114 extern void config_amiga(void);
 115 extern void config_atari(void);
 116 extern void config_mac(void);
 117 extern void config_sun3(void);
 118 extern void config_apollo(void);
 119 extern void config_mvme147(void);
 120 extern void config_mvme16x(void);
 121 extern void config_bvme6000(void);
 122 extern void config_hp300(void);
 123 extern void config_q40(void);
 124 extern void config_sun3x(void);
 125
 126 extern void mac_debugging_short (int, short);
 127 extern void mac_debugging_long  (int, long);
 128
 129 #define MASK_256K 0xfffc0000
 130
 131 extern void paging_init(void);
 132
 133 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 134 {
 135     while (record->tag != BI_LAST) {
 136         int unknown = 0;
 137         const unsigned long *data = record->data;
 138         switch (record->tag) {
 139             case BI_MACHTYPE:
 140             case BI_CPUTYPE:
 141             case BI_FPUTYPE:
 142             case BI_MMUTYPE:
 143                 /* Already set up by head.S */
 144                 break;
 145
 146             case BI_MEMCHUNK:
 147                 if (m68k_num_memory < NUM_MEMINFO) {
 148                     m68k_memory[m68k_num_memory].addr = data[0];
 149                     m68k_memory[m68k_num_memory].size = data[1];
 150                     m68k_num_memory++;
 151                 } else
 152                     printk("m68k_parse_bootinfo: too many memory chunks\n");
 153                 break;
 154
 155             case BI_RAMDISK:
 156                 m68k_ramdisk.addr = data[0];
 157                 m68k_ramdisk.size = data[1];
 158                 break;
 159
 160             case BI_COMMAND_LINE:
 161                 strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line));
 162                 break;
 163
 164             default:
 165                 if (MACH_IS_AMIGA)
 166                     unknown = amiga_parse_bootinfo(record);
 167                 else if (MACH_IS_ATARI)
 168                     unknown = atari_parse_bootinfo(record);
 169                 else if (MACH_IS_MAC)
 170                     unknown = mac_parse_bootinfo(record);
 171                 else if (MACH_IS_Q40)
 172                     unknown = q40_parse_bootinfo(record);
 173                 else if (MACH_IS_BVME6000)
 174                     unknown = bvme6000_parse_bootinfo(record);
 175                 else if (MACH_IS_MVME16x)
 176                     unknown = mvme16x_parse_bootinfo(record);
 177                 else if (MACH_IS_MVME147)
 178                     unknown = mvme147_parse_bootinfo(record);
 179                 else if (MACH_IS_HP300)
 180                     unknown = hp300_parse_bootinfo(record);
 181                 else
 182                     unknown = 1;
 183         }
 184         if (unknown)
 185             printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 186                    record->tag);
 187         record = (struct bi_record *)((unsigned long)record+record->size);
 188     }
 189
 190     m68k_realnum_memory = m68k_num_memory;
 191 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 192     if (m68k_num_memory > 1) {
 193         printk("Ignoring last %i chunks of physical memory\n",
 194                (m68k_num_memory - 1));
 195         m68k_num_memory = 1;
 196     }
 197     m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
 198 #endif
 199 }
 200
 201 void __init setup_arch(char **cmdline_p)
 202 {
 203         extern int _etext, _edata, _end;
 204 #ifndef CONFIG_SUN3
 205         unsigned long endmem, startmem;
 206 #endif
 207         int i;
 208         char *p, *q;
 209
 210         /* The bootinfo is located right after the kernel bss */
 211         m68k_parse_bootinfo((const struct bi_record *)&_end);
 212
 213         if (CPU_IS_040)
 214                 m68k_is040or060 = 4;
 215         else if (CPU_IS_060)
 216                 m68k_is040or060 = 6;
 217
 218         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 219          * be confused by software FPU emulation. BEWARE.
 220          * We should really do our own FPU check at startup.
 221          * [what do we do with buggy 68LC040s? if we have problems
 222          *  with them, we should add a test to check_bugs() below] */
 223 #ifndef CONFIG_M68KFPU_EMU_ONLY
 224         /* clear the fpu if we have one */
 225         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 226                 volatile int zero = 0;
 227                 asm __volatile__ ("frestore %0" : : "m" (zero));
 228         }
 229 #endif
 230
 231         if (CPU_IS_060) {
 232                 u32 pcr;
 233
 234                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 235                      : "=d" (pcr));
 236                 if (((pcr >> 8) & 0xff) <= 5) {
 237                         printk("Enabling workaround for errata I14\n");
 238                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 239                              : : "d" (pcr | 0x20));
 240                 }
 241         }
 242
 243         init_mm.start_code = PAGE_OFFSET;
 244         init_mm.end_code = (unsigned long) &_etext;
 245         init_mm.end_data = (unsigned long) &_edata;
 246         init_mm.brk = (unsigned long) &_end;
 247
 248         *cmdline_p = m68k_command_line;
 249         memcpy(saved_command_line, *cmdline_p, CL_SIZE);
 250
 251         /* Parse the command line for arch-specific options.
 252          * For the m68k, this is currently only "debug=xxx" to enable printing
 253          * certain kernel messages to some machine-specific device.
 254          */
 255         for( p = *cmdline_p; p && *p; ) {
 256             i = 0;
 257             if (!strncmp( p, "debug=", 6 )) {
 258                 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
 259                 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
 260                 i = 1;
 261             }
 262 #ifdef CONFIG_ATARI
 263             /* This option must be parsed very early */
 264             if (!strncmp( p, "switches=", 9 )) {
 265                 extern void atari_switches_setup( const char *, int );
 266                 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
 267                                            (q - (p+9)) : strlen(p+9) );
 268                 i = 1;
 269             }
 270 #endif
 271
 272             if (i) {
 273                 /* option processed, delete it */
 274                 if ((q = strchr( p, ' ' )))
 275                     strcpy( p, q+1 );
 276                 else
 277                     *p = 0;
 278             } else {
 279                 if ((p = strchr( p, ' ' ))) ++p;
 280             }
 281         }
 282
 283         switch (m68k_machtype) {
 284 #ifdef CONFIG_AMIGA
 285             case MACH_AMIGA:
 286                 config_amiga();
 287                 break;
 288 #endif
 289 #ifdef CONFIG_ATARI
 290             case MACH_ATARI:
 291                 config_atari();
 292                 break;
 293 #endif
 294 #ifdef CONFIG_MAC
 295             case MACH_MAC:
 296                 config_mac();
 297                 break;
 298 #endif
 299 #ifdef CONFIG_SUN3
 300             case MACH_SUN3:
 301                 config_sun3();
 302                 break;
 303 #endif
 304 #ifdef CONFIG_APOLLO
 305             case MACH_APOLLO:
 306                 config_apollo();
 307                 break;
 308 #endif
 309 #ifdef CONFIG_MVME147
 310             case MACH_MVME147:
 311                 config_mvme147();
 312                 break;
 313 #endif
 314 #ifdef CONFIG_MVME16x
 315             case MACH_MVME16x:
 316                 config_mvme16x();
 317                 break;
 318 #endif
 319 #ifdef CONFIG_BVME6000
 320             case MACH_BVME6000:
 321                 config_bvme6000();
 322                 break;
 323 #endif
 324 #ifdef CONFIG_HP300
 325             case MACH_HP300:
 326                 config_hp300();
 327                 break;
 328 #endif
 329 #ifdef CONFIG_Q40
 330             case MACH_Q40:
 331                 config_q40();
 332                 break;
 333 #endif
 334 #ifdef CONFIG_SUN3X
 335             case MACH_SUN3X:
 336                 config_sun3x();
 337                 break;
 338 #endif
 339             default:
 340                 panic ("No configuration setup");
 341         }
 342
 343 #ifndef CONFIG_SUN3
 344         startmem= m68k_memory[0].addr;
 345         endmem = startmem + m68k_memory[0].size;
 346         high_memory = (void *)PAGE_OFFSET;
 347         for (i = 0; i < m68k_num_memory; i++) {
 348                 m68k_memory[i].size &= MASK_256K;
 349                 if (m68k_memory[i].addr < startmem)
 350                         startmem = m68k_memory[i].addr;
 351                 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
 352                         endmem = m68k_memory[i].addr+m68k_memory[i].size;
 353                 high_memory += m68k_memory[i].size;
 354         }
 355
 356         availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
 357                                       startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
 358
 359         for (i = 0; i < m68k_num_memory; i++)
 360                 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
 361
 362         reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
 363
 364 #ifdef CONFIG_BLK_DEV_INITRD
 365         if (m68k_ramdisk.size) {
 366                 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
 367                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 368                 initrd_end = initrd_start + m68k_ramdisk.size;
 369                 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 370         }
 371 #endif
 372
 373 #ifdef CONFIG_ATARI
 374         if (MACH_IS_ATARI)
 375                 atari_stram_reserve_pages((void *)availmem);
 376 #endif
 377 #ifdef CONFIG_SUN3X
 378         if (MACH_IS_SUN3X) {
 379                 dvma_init();
 380         }
 381 #endif
 382
 383 #endif /* !CONFIG_SUN3 */
 384
 385         paging_init();
 386
 387 /* set ISA defs early as possible */
 388 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 389 #if defined(CONFIG_Q40)
 390         if (MACH_IS_Q40) {
 391             isa_type = Q40_ISA;
 392             isa_sex = 0;
 393         }
 394 #elif defined(CONFIG_GG2)
 395         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
 396             isa_type = GG2_ISA;
 397             isa_sex = 0;
 398         }
 399 #elif defined(CONFIG_AMIGA_PCMCIA)
 400         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
 401             isa_type = AG_ISA;
 402             isa_sex = 1;
 403         }
 404 #endif
 405 #endif
 406 }
 407
 408 static int show_cpuinfo(struct seq_file *m, void *v)
 409 {
 410     const char *cpu, *mmu, *fpu;
 411     unsigned long clockfreq, clockfactor;
 412
 413 #define LOOP_CYCLES_68020       (8)
 414 #define LOOP_CYCLES_68030       (8)
 415 #define LOOP_CYCLES_68040       (3)
 416 #define LOOP_CYCLES_68060       (1)
 417
 418     if (CPU_IS_020) {
 419         cpu = "68020";
 420         clockfactor = LOOP_CYCLES_68020;
 421     } else if (CPU_IS_030) {
 422         cpu = "68030";
 423         clockfactor = LOOP_CYCLES_68030;
 424     } else if (CPU_IS_040) {
 425         cpu = "68040";
 426         clockfactor = LOOP_CYCLES_68040;
 427     } else if (CPU_IS_060) {
 428         cpu = "68060";
 429         clockfactor = LOOP_CYCLES_68060;
 430     } else {
 431         cpu = "680x0";
 432         clockfactor = 0;
 433     }
 434
 435 #ifdef CONFIG_M68KFPU_EMU_ONLY
 436     fpu="none(soft float)";
 437 #else
 438     if (m68k_fputype & FPU_68881)
 439         fpu = "68881";
 440     else if (m68k_fputype & FPU_68882)
 441         fpu = "68882";
 442     else if (m68k_fputype & FPU_68040)
 443         fpu = "68040";
 444     else if (m68k_fputype & FPU_68060)
 445         fpu = "68060";
 446     else if (m68k_fputype & FPU_SUNFPA)
 447         fpu = "Sun FPA";
 448     else
 449         fpu = "none";
 450 #endif
 451
 452     if (m68k_mmutype & MMU_68851)
 453         mmu = "68851";
 454     else if (m68k_mmutype & MMU_68030)
 455         mmu = "68030";
 456     else if (m68k_mmutype & MMU_68040)
 457         mmu = "68040";
 458     else if (m68k_mmutype & MMU_68060)
 459         mmu = "68060";
 460     else if (m68k_mmutype & MMU_SUN3)
 461         mmu = "Sun-3";
 462     else if (m68k_mmutype & MMU_APOLLO)
 463         mmu = "Apollo";
 464     else
 465         mmu = "unknown";
 466
 467     clockfreq = loops_per_jiffy*HZ*clockfactor;
 468
 469     seq_printf(m, "CPU:\t\t%s\n"
 470                    "MMU:\t\t%s\n"
 471                    "FPU:\t\t%s\n"
 472                    "Clocking:\t%lu.%1luMHz\n"
 473                    "BogoMips:\t%lu.%02lu\n"
 474                    "Calibration:\t%lu loops\n",
 475                    cpu, mmu, fpu,
 476                    clockfreq/1000000,(clockfreq/100000)%10,
 477                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 478                    loops_per_jiffy);
 479     return 0;
 480 }
 481
 482 static void *c_start(struct seq_file *m, loff_t *pos)
 483 {
 484         return *pos < 1 ? (void *)1 : NULL;
 485 }
 486 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 487 {
 488         ++*pos;
 489         return NULL;
 490 }
 491 static void c_stop(struct seq_file *m, void *v)
 492 {
 493 }
 494 struct seq_operations cpuinfo_op = {
 495         .start =        c_start,
 496         .next =         c_next,
 497         .stop =         c_stop,
 498         .show =         show_cpuinfo,
 499 };
 500
 501 int get_hardware_list(char *buffer)
 502 {
 503     int len = 0;
 504     char model[80];
 505     unsigned long mem;
 506     int i;
 507
 508     if (mach_get_model)
 509         mach_get_model(model);
 510     else
 511         strcpy(model, "Unknown m68k");
 512
 513     len += sprintf(buffer+len, "Model:\t\t%s\n", model);
 514     for (mem = 0, i = 0; i < m68k_num_memory; i++)
 515         mem += m68k_memory[i].size;
 516     len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
 517
 518     if (mach_get_hardware_list)
 519         len += mach_get_hardware_list(buffer+len);
 520
 521     return(len);
 522 }
 523
 524
 525 #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
 526 void __init floppy_setup(char *str, int *ints)
 527 {
 528         if (mach_floppy_setup)
 529                 mach_floppy_setup (str, ints);
 530 }
 531
 532 #endif
 533
 534 void check_bugs(void)
 535 {
 536 #ifndef CONFIG_M68KFPU_EMU
 537         if (m68k_fputype == 0) {
 538                 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 539                                 "WHICH IS REQUIRED BY LINUX/M68K ***\n" );
 540                 printk( KERN_EMERG "Upgrade your hardware or join the FPU "
 541                                 "emulation project\n" );
 542                 panic( "no FPU" );
 543         }
 544 #endif /* !CONFIG_M68KFPU_EMU */
 545 }