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   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 #define MASK_256K 0xfffc0000
 137
 138 extern void paging_init(void);
 139
 140 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 141 {
 142         while (record->tag != BI_LAST) {
 143                 int unknown = 0;
 144                 const unsigned long *data = record->data;
 145
 146                 switch (record->tag) {
 147                 case BI_MACHTYPE:
 148                 case BI_CPUTYPE:
 149                 case BI_FPUTYPE:
 150                 case BI_MMUTYPE:
 151                         /* Already set up by head.S */
 152                         break;
 153
 154                 case BI_MEMCHUNK:
 155                         if (m68k_num_memory < NUM_MEMINFO) {
 156                                 m68k_memory[m68k_num_memory].addr = data[0];
 157                                 m68k_memory[m68k_num_memory].size = data[1];
 158                                 m68k_num_memory++;
 159                         } else
 160                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 161                         break;
 162
 163                 case BI_RAMDISK:
 164                         m68k_ramdisk.addr = data[0];
 165                         m68k_ramdisk.size = data[1];
 166                         break;
 167
 168                 case BI_COMMAND_LINE:
 169                         strlcpy(m68k_command_line, (const char *)data,
 170                                 sizeof(m68k_command_line));
 171                         break;
 172
 173                 default:
 174                         if (MACH_IS_AMIGA)
 175                                 unknown = amiga_parse_bootinfo(record);
 176                         else if (MACH_IS_ATARI)
 177                                 unknown = atari_parse_bootinfo(record);
 178                         else if (MACH_IS_MAC)
 179                                 unknown = mac_parse_bootinfo(record);
 180                         else if (MACH_IS_Q40)
 181                                 unknown = q40_parse_bootinfo(record);
 182                         else if (MACH_IS_BVME6000)
 183                                 unknown = bvme6000_parse_bootinfo(record);
 184                         else if (MACH_IS_MVME16x)
 185                                 unknown = mvme16x_parse_bootinfo(record);
 186                         else if (MACH_IS_MVME147)
 187                                 unknown = mvme147_parse_bootinfo(record);
 188                         else if (MACH_IS_HP300)
 189                                 unknown = hp300_parse_bootinfo(record);
 190                         else
 191                                 unknown = 1;
 192                 }
 193                 if (unknown)
 194                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 195                                record->tag);
 196                 record = (struct bi_record *)((unsigned long)record +
 197                                               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(boot_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                         q = strchr(m68k_debug_device, ' ');
 270                         if (q)
 271                                 *q = 0;
 272                         i = 1;
 273                 }
 274 #ifdef CONFIG_ATARI
 275                 /* This option must be parsed very early */
 276                 if (!strncmp(p, "switches=", 9)) {
 277                         extern void atari_switches_setup(const char *, int);
 278                         q = strchr(p + 9, ' ');
 279                         atari_switches_setup(p + 9, q ? (q - (p + 9)) : strlen(p + 9));
 280                         i = 1;
 281                 }
 282 #endif
 283
 284                 if (i) {
 285                         /* option processed, delete it */
 286                         if ((q = strchr(p, ' ')))
 287                                 strcpy(p, q + 1);
 288                         else
 289                                 *p = 0;
 290                 } else {
 291                         if ((p = strchr(p, ' ')))
 292                                 ++p;
 293                 }
 294         }
 295
 296 #ifdef CONFIG_DUMMY_CONSOLE
 297         conswitchp = &dummy_con;
 298 #endif
 299
 300         switch (m68k_machtype) {
 301 #ifdef CONFIG_AMIGA
 302         case MACH_AMIGA:
 303                 config_amiga();
 304                 break;
 305 #endif
 306 #ifdef CONFIG_ATARI
 307         case MACH_ATARI:
 308                 config_atari();
 309                 break;
 310 #endif
 311 #ifdef CONFIG_MAC
 312         case MACH_MAC:
 313                 config_mac();
 314                 break;
 315 #endif
 316 #ifdef CONFIG_SUN3
 317         case MACH_SUN3:
 318                 config_sun3();
 319                 break;
 320 #endif
 321 #ifdef CONFIG_APOLLO
 322         case MACH_APOLLO:
 323                 config_apollo();
 324                 break;
 325 #endif
 326 #ifdef CONFIG_MVME147
 327         case MACH_MVME147:
 328                 config_mvme147();
 329                 break;
 330 #endif
 331 #ifdef CONFIG_MVME16x
 332         case MACH_MVME16x:
 333                 config_mvme16x();
 334                 break;
 335 #endif
 336 #ifdef CONFIG_BVME6000
 337         case MACH_BVME6000:
 338                 config_bvme6000();
 339                 break;
 340 #endif
 341 #ifdef CONFIG_HP300
 342         case MACH_HP300:
 343                 config_hp300();
 344                 break;
 345 #endif
 346 #ifdef CONFIG_Q40
 347         case MACH_Q40:
 348                 config_q40();
 349                 break;
 350 #endif
 351 #ifdef CONFIG_SUN3X
 352         case MACH_SUN3X:
 353                 config_sun3x();
 354                 break;
 355 #endif
 356         default:
 357                 panic("No configuration setup");
 358         }
 359
 360 #ifndef CONFIG_SUN3
 361         startmem= m68k_memory[0].addr;
 362         endmem = startmem + m68k_memory[0].size;
 363         high_memory = (void *)PAGE_OFFSET;
 364         for (i = 0; i < m68k_num_memory; i++) {
 365                 m68k_memory[i].size &= MASK_256K;
 366                 if (m68k_memory[i].addr < startmem)
 367                         startmem = m68k_memory[i].addr;
 368                 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
 369                         endmem = m68k_memory[i].addr+m68k_memory[i].size;
 370                 high_memory += m68k_memory[i].size;
 371         }
 372
 373         availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
 374                                       startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
 375
 376         for (i = 0; i < m68k_num_memory; i++)
 377                 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
 378
 379         reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
 380
 381 #ifdef CONFIG_BLK_DEV_INITRD
 382         if (m68k_ramdisk.size) {
 383                 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
 384                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 385                 initrd_end = initrd_start + m68k_ramdisk.size;
 386                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 387         }
 388 #endif
 389
 390 #ifdef CONFIG_ATARI
 391         if (MACH_IS_ATARI)
 392                 atari_stram_reserve_pages((void *)availmem);
 393 #endif
 394 #ifdef CONFIG_SUN3X
 395         if (MACH_IS_SUN3X) {
 396                 dvma_init();
 397         }
 398 #endif
 399
 400 #endif /* !CONFIG_SUN3 */
 401
 402         paging_init();
 403
 404 /* set ISA defs early as possible */
 405 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 406 #if defined(CONFIG_Q40)
 407         if (MACH_IS_Q40) {
 408                 isa_type = Q40_ISA;
 409                 isa_sex = 0;
 410         }
 411 #elif defined(CONFIG_GG2)
 412         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
 413                 isa_type = GG2_ISA;
 414                 isa_sex = 0;
 415         }
 416 #elif defined(CONFIG_AMIGA_PCMCIA)
 417         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 418                 isa_type = AG_ISA;
 419                 isa_sex = 1;
 420         }
 421 #endif
 422 #endif
 423 }
 424
 425 static int show_cpuinfo(struct seq_file *m, void *v)
 426 {
 427         const char *cpu, *mmu, *fpu;
 428         unsigned long clockfreq, clockfactor;
 429
 430 #define LOOP_CYCLES_68020       (8)
 431 #define LOOP_CYCLES_68030       (8)
 432 #define LOOP_CYCLES_68040       (3)
 433 #define LOOP_CYCLES_68060       (1)
 434
 435         if (CPU_IS_020) {
 436                 cpu = "68020";
 437                 clockfactor = LOOP_CYCLES_68020;
 438         } else if (CPU_IS_030) {
 439                 cpu = "68030";
 440                 clockfactor = LOOP_CYCLES_68030;
 441         } else if (CPU_IS_040) {
 442                 cpu = "68040";
 443                 clockfactor = LOOP_CYCLES_68040;
 444         } else if (CPU_IS_060) {
 445                 cpu = "68060";
 446                 clockfactor = LOOP_CYCLES_68060;
 447         } else {
 448                 cpu = "680x0";
 449                 clockfactor = 0;
 450         }
 451
 452 #ifdef CONFIG_M68KFPU_EMU_ONLY
 453         fpu = "none(soft float)";
 454 #else
 455         if (m68k_fputype & FPU_68881)
 456                 fpu = "68881";
 457         else if (m68k_fputype & FPU_68882)
 458                 fpu = "68882";
 459         else if (m68k_fputype & FPU_68040)
 460                 fpu = "68040";
 461         else if (m68k_fputype & FPU_68060)
 462                 fpu = "68060";
 463         else if (m68k_fputype & FPU_SUNFPA)
 464                 fpu = "Sun FPA";
 465         else
 466                 fpu = "none";
 467 #endif
 468
 469         if (m68k_mmutype & MMU_68851)
 470                 mmu = "68851";
 471         else if (m68k_mmutype & MMU_68030)
 472                 mmu = "68030";
 473         else if (m68k_mmutype & MMU_68040)
 474                 mmu = "68040";
 475         else if (m68k_mmutype & MMU_68060)
 476                 mmu = "68060";
 477         else if (m68k_mmutype & MMU_SUN3)
 478                 mmu = "Sun-3";
 479         else if (m68k_mmutype & MMU_APOLLO)
 480                 mmu = "Apollo";
 481         else
 482                 mmu = "unknown";
 483
 484         clockfreq = loops_per_jiffy * HZ * clockfactor;
 485
 486         seq_printf(m, "CPU:\t\t%s\n"
 487                    "MMU:\t\t%s\n"
 488                    "FPU:\t\t%s\n"
 489                    "Clocking:\t%lu.%1luMHz\n"
 490                    "BogoMips:\t%lu.%02lu\n"
 491                    "Calibration:\t%lu loops\n",
 492                    cpu, mmu, fpu,
 493                    clockfreq/1000000,(clockfreq/100000)%10,
 494                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 495                    loops_per_jiffy);
 496         return 0;
 497 }
 498
 499 static void *c_start(struct seq_file *m, loff_t *pos)
 500 {
 501         return *pos < 1 ? (void *)1 : NULL;
 502 }
 503 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 504 {
 505         ++*pos;
 506         return NULL;
 507 }
 508 static void c_stop(struct seq_file *m, void *v)
 509 {
 510 }
 511 struct seq_operations cpuinfo_op = {
 512         .start  = c_start,
 513         .next   = c_next,
 514         .stop   = c_stop,
 515         .show   = show_cpuinfo,
 516 };
 517
 518 int get_hardware_list(char *buffer)
 519 {
 520         int len = 0;
 521         char model[80];
 522         unsigned long mem;
 523         int i;
 524
 525         if (mach_get_model)
 526                 mach_get_model(model);
 527         else
 528                 strcpy(model, "Unknown m68k");
 529
 530         len += sprintf(buffer + len, "Model:\t\t%s\n", model);
 531         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 532                 mem += m68k_memory[i].size;
 533         len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
 534
 535         if (mach_get_hardware_list)
 536                 len += mach_get_hardware_list(buffer + len);
 537
 538         return len;
 539 }
 540
 541 void check_bugs(void)
 542 {
 543 #ifndef CONFIG_M68KFPU_EMU
 544         if (m68k_fputype == 0) {
 545                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 546                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 547                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 548                         "emulation project\n");
 549                 panic("no FPU");
 550         }
 551 #endif /* !CONFIG_M68KFPU_EMU */
 552 }