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