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
 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
 179                     unknown = 1;
 180         }
 181         if (unknown)
 182             printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 183                    record->tag);
 184         record = (struct bi_record *)((unsigned long)record+record->size);
 185     }
 186
 187     m68k_realnum_memory = m68k_num_memory;
 188 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 189     if (m68k_num_memory > 1) {
 190         printk("Ignoring last %i chunks of physical memory\n",
 191                (m68k_num_memory - 1));
 192         m68k_num_memory = 1;
 193     }
 194     m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
 195 #endif
 196 }
 197
 198 void __init setup_arch(char **cmdline_p)
 199 {
 200         extern int _etext, _edata, _end;
 201 #ifndef CONFIG_SUN3
 202         unsigned long endmem, startmem;
 203 #endif
 204         int i;
 205         char *p, *q;
 206
 207         if (!MACH_IS_HP300) {
 208                 /* The bootinfo is located right after the kernel bss */
 209                 m68k_parse_bootinfo((const struct bi_record *)&_end);
 210         } else {
 211                 /* FIXME HP300 doesn't use bootinfo yet */
 212                 extern unsigned long hp300_phys_ram_base;
 213                 unsigned long hp300_mem_size = 0xffffffff-hp300_phys_ram_base;
 214                 m68k_cputype = CPU_68030;
 215                 m68k_fputype = FPU_68882;
 216                 m68k_memory[0].addr = hp300_phys_ram_base;
 217                 /* 0.5M fudge factor */
 218                 m68k_memory[0].size = hp300_mem_size-512*1024;
 219                 m68k_num_memory++;
 220         }
 221
 222         if (CPU_IS_040)
 223                 m68k_is040or060 = 4;
 224         else if (CPU_IS_060)
 225                 m68k_is040or060 = 6;
 226
 227         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 228          * be confused by software FPU emulation. BEWARE.
 229          * We should really do our own FPU check at startup.
 230          * [what do we do with buggy 68LC040s? if we have problems
 231          *  with them, we should add a test to check_bugs() below] */
 232 #ifndef CONFIG_M68KFPU_EMU_ONLY
 233         /* clear the fpu if we have one */
 234         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 235                 volatile int zero = 0;
 236                 asm __volatile__ ("frestore %0" : : "m" (zero));
 237         }
 238 #endif
 239
 240         if (CPU_IS_060) {
 241                 u32 pcr;
 242
 243                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 244                      : "=d" (pcr));
 245                 if (((pcr >> 8) & 0xff) <= 5) {
 246                         printk("Enabling workaround for errata I14\n");
 247                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 248                              : : "d" (pcr | 0x20));
 249                 }
 250         }
 251
 252         init_mm.start_code = PAGE_OFFSET;
 253         init_mm.end_code = (unsigned long) &_etext;
 254         init_mm.end_data = (unsigned long) &_edata;
 255         init_mm.brk = (unsigned long) &_end;
 256
 257         *cmdline_p = m68k_command_line;
 258         memcpy(saved_command_line, *cmdline_p, CL_SIZE);
 259
 260         /* Parse the command line for arch-specific options.
 261          * For the m68k, this is currently only "debug=xxx" to enable printing
 262          * certain kernel messages to some machine-specific device.
 263          */
 264         for( p = *cmdline_p; p && *p; ) {
 265             i = 0;
 266             if (!strncmp( p, "debug=", 6 )) {
 267                 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
 268                 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
 269                 i = 1;
 270             }
 271 #ifdef CONFIG_ATARI
 272             /* This option must be parsed very early */
 273             if (!strncmp( p, "switches=", 9 )) {
 274                 extern void atari_switches_setup( const char *, int );
 275                 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
 276                                            (q - (p+9)) : strlen(p+9) );
 277                 i = 1;
 278             }
 279 #endif
 280
 281             if (i) {
 282                 /* option processed, delete it */
 283                 if ((q = strchr( p, ' ' )))
 284                     strcpy( p, q+1 );
 285                 else
 286                     *p = 0;
 287             } else {
 288                 if ((p = strchr( p, ' ' ))) ++p;
 289             }
 290         }
 291
 292         switch (m68k_machtype) {
 293 #ifdef CONFIG_AMIGA
 294             case MACH_AMIGA:
 295                 config_amiga();
 296                 break;
 297 #endif
 298 #ifdef CONFIG_ATARI
 299             case MACH_ATARI:
 300                 config_atari();
 301                 break;
 302 #endif
 303 #ifdef CONFIG_MAC
 304             case MACH_MAC:
 305                 config_mac();
 306                 break;
 307 #endif
 308 #ifdef CONFIG_SUN3
 309             case MACH_SUN3:
 310                 config_sun3();
 311                 break;
 312 #endif
 313 #ifdef CONFIG_APOLLO
 314             case MACH_APOLLO:
 315                 config_apollo();
 316                 break;
 317 #endif
 318 #ifdef CONFIG_MVME147
 319             case MACH_MVME147:
 320                 config_mvme147();
 321                 break;
 322 #endif
 323 #ifdef CONFIG_MVME16x
 324             case MACH_MVME16x:
 325                 config_mvme16x();
 326                 break;
 327 #endif
 328 #ifdef CONFIG_BVME6000
 329             case MACH_BVME6000:
 330                 config_bvme6000();
 331                 break;
 332 #endif
 333 #ifdef CONFIG_HP300
 334             case MACH_HP300:
 335                 config_hp300();
 336                 break;
 337 #endif
 338 #ifdef CONFIG_Q40
 339             case MACH_Q40:
 340                 config_q40();
 341                 break;
 342 #endif
 343 #ifdef CONFIG_SUN3X
 344             case MACH_SUN3X:
 345                 config_sun3x();
 346                 break;
 347 #endif
 348             default:
 349                 panic ("No configuration setup");
 350         }
 351
 352 #ifndef CONFIG_SUN3
 353         startmem= m68k_memory[0].addr;
 354         endmem = startmem + m68k_memory[0].size;
 355         high_memory = PAGE_OFFSET;
 356         for (i = 0; i < m68k_num_memory; i++) {
 357                 m68k_memory[i].size &= MASK_256K;
 358                 if (m68k_memory[i].addr < startmem)
 359                         startmem = m68k_memory[i].addr;
 360                 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
 361                         endmem = m68k_memory[i].addr+m68k_memory[i].size;
 362                 high_memory += m68k_memory[i].size;
 363         }
 364
 365         availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
 366                                       startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
 367
 368         for (i = 0; i < m68k_num_memory; i++)
 369                 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
 370
 371         reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
 372
 373 #ifdef CONFIG_BLK_DEV_INITRD
 374         if (m68k_ramdisk.size) {
 375                 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
 376                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 377                 initrd_end = initrd_start + m68k_ramdisk.size;
 378                 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 379         }
 380 #endif
 381
 382 #ifdef CONFIG_ATARI
 383         if (MACH_IS_ATARI)
 384                 atari_stram_reserve_pages((void *)availmem);
 385 #endif
 386 #ifdef CONFIG_SUN3X
 387         if (MACH_IS_SUN3X) {
 388                 dvma_init();
 389         }
 390 #endif
 391
 392 #endif /* !CONFIG_SUN3 */
 393
 394         paging_init();
 395
 396 /* set ISA defs early as possible */
 397 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 398 #if defined(CONFIG_Q40)
 399         if (MACH_IS_Q40) {
 400             isa_type = Q40_ISA;
 401             isa_sex = 0;
 402         }
 403 #elif defined(CONFIG_GG2)
 404         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
 405             isa_type = GG2_ISA;
 406             isa_sex = 0;
 407         }
 408 #elif defined(CONFIG_AMIGA_PCMCIA)
 409         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
 410             isa_type = AG_ISA;
 411             isa_sex = 1;
 412         }
 413 #endif
 414 #endif
 415 }
 416
 417 static int show_cpuinfo(struct seq_file *m, void *v)
 418 {
 419     const char *cpu, *mmu, *fpu;
 420     unsigned long clockfreq, clockfactor;
 421
 422 #define LOOP_CYCLES_68020       (8)
 423 #define LOOP_CYCLES_68030       (8)
 424 #define LOOP_CYCLES_68040       (3)
 425 #define LOOP_CYCLES_68060       (1)
 426
 427     if (CPU_IS_020) {
 428         cpu = "68020";
 429         clockfactor = LOOP_CYCLES_68020;
 430     } else if (CPU_IS_030) {
 431         cpu = "68030";
 432         clockfactor = LOOP_CYCLES_68030;
 433     } else if (CPU_IS_040) {
 434         cpu = "68040";
 435         clockfactor = LOOP_CYCLES_68040;
 436     } else if (CPU_IS_060) {
 437         cpu = "68060";
 438         clockfactor = LOOP_CYCLES_68060;
 439     } else {
 440         cpu = "680x0";
 441         clockfactor = 0;
 442     }
 443
 444 #ifdef CONFIG_M68KFPU_EMU_ONLY
 445     fpu="none(soft float)";
 446 #else
 447     if (m68k_fputype & FPU_68881)
 448         fpu = "68881";
 449     else if (m68k_fputype & FPU_68882)
 450         fpu = "68882";
 451     else if (m68k_fputype & FPU_68040)
 452         fpu = "68040";
 453     else if (m68k_fputype & FPU_68060)
 454         fpu = "68060";
 455     else if (m68k_fputype & FPU_SUNFPA)
 456         fpu = "Sun FPA";
 457     else
 458         fpu = "none";
 459 #endif
 460
 461     if (m68k_mmutype & MMU_68851)
 462         mmu = "68851";
 463     else if (m68k_mmutype & MMU_68030)
 464         mmu = "68030";
 465     else if (m68k_mmutype & MMU_68040)
 466         mmu = "68040";
 467     else if (m68k_mmutype & MMU_68060)
 468         mmu = "68060";
 469     else if (m68k_mmutype & MMU_SUN3)
 470         mmu = "Sun-3";
 471     else if (m68k_mmutype & MMU_APOLLO)
 472         mmu = "Apollo";
 473     else
 474         mmu = "unknown";
 475
 476     clockfreq = loops_per_jiffy*HZ*clockfactor;
 477
 478     seq_printf(m, "CPU:\t\t%s\n"
 479                    "MMU:\t\t%s\n"
 480                    "FPU:\t\t%s\n"
 481                    "Clocking:\t%lu.%1luMHz\n"
 482                    "BogoMips:\t%lu.%02lu\n"
 483                    "Calibration:\t%lu loops\n",
 484                    cpu, mmu, fpu,
 485                    clockfreq/1000000,(clockfreq/100000)%10,
 486                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 487                    loops_per_jiffy);
 488     return 0;
 489 }
 490
 491 static void *c_start(struct seq_file *m, loff_t *pos)
 492 {
 493         return *pos < 1 ? (void *)1 : NULL;
 494 }
 495 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 496 {
 497         ++*pos;
 498         return NULL;
 499 }
 500 static void c_stop(struct seq_file *m, void *v)
 501 {
 502 }
 503 struct seq_operations cpuinfo_op = {
 504         .start =        c_start,
 505         .next =         c_next,
 506         .stop =         c_stop,
 507         .show =         show_cpuinfo,
 508 };
 509
 510 int get_hardware_list(char *buffer)
 511 {
 512     int len = 0;
 513     char model[80];
 514     unsigned long mem;
 515     int i;
 516
 517     if (mach_get_model)
 518         mach_get_model(model);
 519     else
 520         strcpy(model, "Unknown m68k");
 521
 522     len += sprintf(buffer+len, "Model:\t\t%s\n", model);
 523     for (mem = 0, i = 0; i < m68k_num_memory; i++)
 524         mem += m68k_memory[i].size;
 525     len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
 526
 527     if (mach_get_hardware_list)
 528         len += mach_get_hardware_list(buffer+len);
 529
 530     return(len);
 531 }
 532
 533
 534 #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
 535 void __init floppy_setup(char *str, int *ints)
 536 {
 537         if (mach_floppy_setup)
 538                 mach_floppy_setup (str, ints);
 539 }
 540
 541 #endif
 542
 543 void check_bugs(void)
 544 {
 545 #ifndef CONFIG_M68KFPU_EMU
 546         if (m68k_fputype == 0) {
 547                 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 548                                 "WHICH IS REQUIRED BY LINUX/M68K ***\n" );
 549                 printk( KERN_EMERG "Upgrade your hardware or join the FPU "
 550                                 "emulation project\n" );
 551                 panic( "no FPU" );
 552         }
 553
 554 #endif /* CONFIG_SUN3 */
 555
 556 }