arch/m68k/kernel/setup_mm.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/proc_fs.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/sections.h>
  30 #include <asm/setup.h>
  31 #include <asm/fpu.h>
  32 #include <asm/irq.h>
  33 #include <asm/io.h>
  34 #include <asm/machdep.h>
  35 #ifdef CONFIG_AMIGA
  36 #include <asm/amigahw.h>
  37 #endif
  38 #ifdef CONFIG_ATARI
  39 #include <asm/atarihw.h>
  40 #include <asm/atari_stram.h>
  41 #endif
  42 #ifdef CONFIG_SUN3X
  43 #include <asm/dvma.h>
  44 #endif
  45 #include <asm/natfeat.h>
  46
  47 #if !FPSTATESIZE || !NR_IRQS
  48 #warning No CPU/platform type selected, your kernel will not work!
  49 #warning Are you building an allnoconfig kernel?
  50 #endif
  51
  52 unsigned long m68k_machtype;
  53 EXPORT_SYMBOL(m68k_machtype);
  54 unsigned long m68k_cputype;
  55 EXPORT_SYMBOL(m68k_cputype);
  56 unsigned long m68k_fputype;
  57 unsigned long m68k_mmutype;
  58 EXPORT_SYMBOL(m68k_mmutype);
  59 #ifdef CONFIG_VME
  60 unsigned long vme_brdtype;
  61 EXPORT_SYMBOL(vme_brdtype);
  62 #endif
  63
  64 int m68k_is040or060;
  65 EXPORT_SYMBOL(m68k_is040or060);
  66
  67 extern unsigned long availmem;
  68
  69 int m68k_num_memory;
  70 EXPORT_SYMBOL(m68k_num_memory);
  71 int m68k_realnum_memory;
  72 EXPORT_SYMBOL(m68k_realnum_memory);
  73 unsigned long m68k_memoffset;
  74 struct mem_info m68k_memory[NUM_MEMINFO];
  75 EXPORT_SYMBOL(m68k_memory);
  76
  77 struct mem_info m68k_ramdisk;
  78
  79 static char m68k_command_line[CL_SIZE];
  80
  81 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  82 /* machine dependent irq functions */
  83 void (*mach_init_IRQ) (void) __initdata = NULL;
  84 void (*mach_get_model) (char *model);
  85 void (*mach_get_hardware_list) (struct seq_file *m);
  86 /* machine dependent timer functions */
  87 int (*mach_hwclk) (int, struct rtc_time*);
  88 EXPORT_SYMBOL(mach_hwclk);
  89 int (*mach_set_clock_mmss) (unsigned long);
  90 unsigned int (*mach_get_ss)(void);
  91 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  92 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  93 EXPORT_SYMBOL(mach_get_ss);
  94 EXPORT_SYMBOL(mach_get_rtc_pll);
  95 EXPORT_SYMBOL(mach_set_rtc_pll);
  96 void (*mach_reset)( void );
  97 void (*mach_halt)( void );
  98 void (*mach_power_off)( void );
  99 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
 100 #ifdef CONFIG_HEARTBEAT
 101 void (*mach_heartbeat) (int);
 102 EXPORT_SYMBOL(mach_heartbeat);
 103 #endif
 104 #ifdef CONFIG_M68K_L2_CACHE
 105 void (*mach_l2_flush) (int);
 106 #endif
 107 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 108 void (*mach_beep)(unsigned int, unsigned int);
 109 EXPORT_SYMBOL(mach_beep);
 110 #endif
 111 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 112 int isa_type;
 113 int isa_sex;
 114 EXPORT_SYMBOL(isa_type);
 115 EXPORT_SYMBOL(isa_sex);
 116 #endif
 117
 118 extern int amiga_parse_bootinfo(const struct bi_record *);
 119 extern int atari_parse_bootinfo(const struct bi_record *);
 120 extern int mac_parse_bootinfo(const struct bi_record *);
 121 extern int q40_parse_bootinfo(const struct bi_record *);
 122 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 123 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 124 extern int mvme147_parse_bootinfo(const struct bi_record *);
 125 extern int hp300_parse_bootinfo(const struct bi_record *);
 126 extern int apollo_parse_bootinfo(const struct bi_record *);
 127
 128 extern void config_amiga(void);
 129 extern void config_atari(void);
 130 extern void config_mac(void);
 131 extern void config_sun3(void);
 132 extern void config_apollo(void);
 133 extern void config_mvme147(void);
 134 extern void config_mvme16x(void);
 135 extern void config_bvme6000(void);
 136 extern void config_hp300(void);
 137 extern void config_q40(void);
 138 extern void config_sun3x(void);
 139
 140 #define MASK_256K 0xfffc0000
 141
 142 extern void paging_init(void);
 143
 144 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 145 {
 146         while (record->tag != BI_LAST) {
 147                 int unknown = 0;
 148                 const unsigned long *data = record->data;
 149
 150                 switch (record->tag) {
 151                 case BI_MACHTYPE:
 152                 case BI_CPUTYPE:
 153                 case BI_FPUTYPE:
 154                 case BI_MMUTYPE:
 155                         /* Already set up by head.S */
 156                         break;
 157
 158                 case BI_MEMCHUNK:
 159                         if (m68k_num_memory < NUM_MEMINFO) {
 160                                 m68k_memory[m68k_num_memory].addr = data[0];
 161                                 m68k_memory[m68k_num_memory].size = data[1];
 162                                 m68k_num_memory++;
 163                         } else
 164                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 165                         break;
 166
 167                 case BI_RAMDISK:
 168                         m68k_ramdisk.addr = data[0];
 169                         m68k_ramdisk.size = data[1];
 170                         break;
 171
 172                 case BI_COMMAND_LINE:
 173                         strlcpy(m68k_command_line, (const char *)data,
 174                                 sizeof(m68k_command_line));
 175                         break;
 176
 177                 default:
 178                         if (MACH_IS_AMIGA)
 179                                 unknown = amiga_parse_bootinfo(record);
 180                         else if (MACH_IS_ATARI)
 181                                 unknown = atari_parse_bootinfo(record);
 182                         else if (MACH_IS_MAC)
 183                                 unknown = mac_parse_bootinfo(record);
 184                         else if (MACH_IS_Q40)
 185                                 unknown = q40_parse_bootinfo(record);
 186                         else if (MACH_IS_BVME6000)
 187                                 unknown = bvme6000_parse_bootinfo(record);
 188                         else if (MACH_IS_MVME16x)
 189                                 unknown = mvme16x_parse_bootinfo(record);
 190                         else if (MACH_IS_MVME147)
 191                                 unknown = mvme147_parse_bootinfo(record);
 192                         else if (MACH_IS_HP300)
 193                                 unknown = hp300_parse_bootinfo(record);
 194                         else if (MACH_IS_APOLLO)
 195                                 unknown = apollo_parse_bootinfo(record);
 196                         else
 197                                 unknown = 1;
 198                 }
 199                 if (unknown)
 200                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 201                                record->tag);
 202                 record = (struct bi_record *)((unsigned long)record +
 203                                               record->size);
 204         }
 205
 206         m68k_realnum_memory = m68k_num_memory;
 207 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 208         if (m68k_num_memory > 1) {
 209                 printk("Ignoring last %i chunks of physical memory\n",
 210                        (m68k_num_memory - 1));
 211                 m68k_num_memory = 1;
 212         }
 213 #endif
 214 }
 215
 216 void __init setup_arch(char **cmdline_p)
 217 {
 218 #ifndef CONFIG_SUN3
 219         int i;
 220 #endif
 221
 222         /* The bootinfo is located right after the kernel bss */
 223         if (!CPU_IS_COLDFIRE)
 224                 m68k_parse_bootinfo((const struct bi_record *)_end);
 225
 226         if (CPU_IS_040)
 227                 m68k_is040or060 = 4;
 228         else if (CPU_IS_060)
 229                 m68k_is040or060 = 6;
 230
 231         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 232          * be confused by software FPU emulation. BEWARE.
 233          * We should really do our own FPU check at startup.
 234          * [what do we do with buggy 68LC040s? if we have problems
 235          *  with them, we should add a test to check_bugs() below] */
 236 #ifndef CONFIG_M68KFPU_EMU_ONLY
 237         /* clear the fpu if we have one */
 238         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
 239                 volatile int zero = 0;
 240                 asm volatile ("frestore %0" : : "m" (zero));
 241         }
 242 #endif
 243
 244         if (CPU_IS_060) {
 245                 u32 pcr;
 246
 247                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 248                      : "=d" (pcr));
 249                 if (((pcr >> 8) & 0xff) <= 5) {
 250                         printk("Enabling workaround for errata I14\n");
 251                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 252                              : : "d" (pcr | 0x20));
 253                 }
 254         }
 255
 256         init_mm.start_code = PAGE_OFFSET;
 257         init_mm.end_code = (unsigned long)_etext;
 258         init_mm.end_data = (unsigned long)_edata;
 259         init_mm.brk = (unsigned long)_end;
 260
 261 #if defined(CONFIG_BOOTPARAM)
 262         strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
 263         m68k_command_line[CL_SIZE - 1] = 0;
 264 #endif /* CONFIG_BOOTPARAM */
 265         *cmdline_p = m68k_command_line;
 266         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 267
 268         parse_early_param();
 269
 270 #ifdef CONFIG_DUMMY_CONSOLE
 271         conswitchp = &dummy_con;
 272 #endif
 273
 274         switch (m68k_machtype) {
 275 #ifdef CONFIG_AMIGA
 276         case MACH_AMIGA:
 277                 config_amiga();
 278                 break;
 279 #endif
 280 #ifdef CONFIG_ATARI
 281         case MACH_ATARI:
 282                 config_atari();
 283                 break;
 284 #endif
 285 #ifdef CONFIG_MAC
 286         case MACH_MAC:
 287                 config_mac();
 288                 break;
 289 #endif
 290 #ifdef CONFIG_SUN3
 291         case MACH_SUN3:
 292                 config_sun3();
 293                 break;
 294 #endif
 295 #ifdef CONFIG_APOLLO
 296         case MACH_APOLLO:
 297                 config_apollo();
 298                 break;
 299 #endif
 300 #ifdef CONFIG_MVME147
 301         case MACH_MVME147:
 302                 config_mvme147();
 303                 break;
 304 #endif
 305 #ifdef CONFIG_MVME16x
 306         case MACH_MVME16x:
 307                 config_mvme16x();
 308                 break;
 309 #endif
 310 #ifdef CONFIG_BVME6000
 311         case MACH_BVME6000:
 312                 config_bvme6000();
 313                 break;
 314 #endif
 315 #ifdef CONFIG_HP300
 316         case MACH_HP300:
 317                 config_hp300();
 318                 break;
 319 #endif
 320 #ifdef CONFIG_Q40
 321         case MACH_Q40:
 322                 config_q40();
 323                 break;
 324 #endif
 325 #ifdef CONFIG_SUN3X
 326         case MACH_SUN3X:
 327                 config_sun3x();
 328                 break;
 329 #endif
 330 #ifdef CONFIG_COLDFIRE
 331         case MACH_M54XX:
 332                 config_BSP(NULL, 0);
 333                 break;
 334 #endif
 335         default:
 336                 panic("No configuration setup");
 337         }
 338
 339 #ifdef CONFIG_NATFEAT
 340         nf_init();
 341 #endif
 342
 343         paging_init();
 344
 345 #ifndef CONFIG_SUN3
 346         for (i = 1; i < m68k_num_memory; i++)
 347                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 348                                   m68k_memory[i].size);
 349 #ifdef CONFIG_BLK_DEV_INITRD
 350         if (m68k_ramdisk.size) {
 351                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 352                                      m68k_ramdisk.addr, m68k_ramdisk.size,
 353                                      BOOTMEM_DEFAULT);
 354                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 355                 initrd_end = initrd_start + m68k_ramdisk.size;
 356                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 357         }
 358 #endif
 359
 360 #ifdef CONFIG_ATARI
 361         if (MACH_IS_ATARI)
 362                 atari_stram_reserve_pages((void *)availmem);
 363 #endif
 364 #ifdef CONFIG_SUN3X
 365         if (MACH_IS_SUN3X) {
 366                 dvma_init();
 367         }
 368 #endif
 369
 370 #endif /* !CONFIG_SUN3 */
 371
 372 /* set ISA defs early as possible */
 373 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 374         if (MACH_IS_Q40) {
 375                 isa_type = ISA_TYPE_Q40;
 376                 isa_sex = 0;
 377         }
 378 #ifdef CONFIG_AMIGA_PCMCIA
 379         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 380                 isa_type = ISA_TYPE_AG;
 381                 isa_sex = 1;
 382         }
 383 #endif
 384 #ifdef CONFIG_ATARI_ROM_ISA
 385         if (MACH_IS_ATARI) {
 386                 isa_type = ISA_TYPE_ENEC;
 387                 isa_sex = 0;
 388         }
 389 #endif
 390 #endif
 391 }
 392
 393 static int show_cpuinfo(struct seq_file *m, void *v)
 394 {
 395         const char *cpu, *mmu, *fpu;
 396         unsigned long clockfreq, clockfactor;
 397
 398 #define LOOP_CYCLES_68020       (8)
 399 #define LOOP_CYCLES_68030       (8)
 400 #define LOOP_CYCLES_68040       (3)
 401 #define LOOP_CYCLES_68060       (1)
 402 #define LOOP_CYCLES_COLDFIRE    (2)
 403
 404         if (CPU_IS_020) {
 405                 cpu = "68020";
 406                 clockfactor = LOOP_CYCLES_68020;
 407         } else if (CPU_IS_030) {
 408                 cpu = "68030";
 409                 clockfactor = LOOP_CYCLES_68030;
 410         } else if (CPU_IS_040) {
 411                 cpu = "68040";
 412                 clockfactor = LOOP_CYCLES_68040;
 413         } else if (CPU_IS_060) {
 414                 cpu = "68060";
 415                 clockfactor = LOOP_CYCLES_68060;
 416         } else if (CPU_IS_COLDFIRE) {
 417                 cpu = "ColdFire";
 418                 clockfactor = LOOP_CYCLES_COLDFIRE;
 419         } else {
 420                 cpu = "680x0";
 421                 clockfactor = 0;
 422         }
 423
 424 #ifdef CONFIG_M68KFPU_EMU_ONLY
 425         fpu = "none(soft float)";
 426 #else
 427         if (m68k_fputype & FPU_68881)
 428                 fpu = "68881";
 429         else if (m68k_fputype & FPU_68882)
 430                 fpu = "68882";
 431         else if (m68k_fputype & FPU_68040)
 432                 fpu = "68040";
 433         else if (m68k_fputype & FPU_68060)
 434                 fpu = "68060";
 435         else if (m68k_fputype & FPU_SUNFPA)
 436                 fpu = "Sun FPA";
 437         else if (m68k_fputype & FPU_COLDFIRE)
 438                 fpu = "ColdFire";
 439         else
 440                 fpu = "none";
 441 #endif
 442
 443         if (m68k_mmutype & MMU_68851)
 444                 mmu = "68851";
 445         else if (m68k_mmutype & MMU_68030)
 446                 mmu = "68030";
 447         else if (m68k_mmutype & MMU_68040)
 448                 mmu = "68040";
 449         else if (m68k_mmutype & MMU_68060)
 450                 mmu = "68060";
 451         else if (m68k_mmutype & MMU_SUN3)
 452                 mmu = "Sun-3";
 453         else if (m68k_mmutype & MMU_APOLLO)
 454                 mmu = "Apollo";
 455         else if (m68k_mmutype & MMU_COLDFIRE)
 456                 mmu = "ColdFire";
 457         else
 458                 mmu = "unknown";
 459
 460         clockfreq = loops_per_jiffy * HZ * clockfactor;
 461
 462         seq_printf(m, "CPU:\t\t%s\n"
 463                    "MMU:\t\t%s\n"
 464                    "FPU:\t\t%s\n"
 465                    "Clocking:\t%lu.%1luMHz\n"
 466                    "BogoMips:\t%lu.%02lu\n"
 467                    "Calibration:\t%lu loops\n",
 468                    cpu, mmu, fpu,
 469                    clockfreq/1000000,(clockfreq/100000)%10,
 470                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 471                    loops_per_jiffy);
 472         return 0;
 473 }
 474
 475 static void *c_start(struct seq_file *m, loff_t *pos)
 476 {
 477         return *pos < 1 ? (void *)1 : NULL;
 478 }
 479 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 480 {
 481         ++*pos;
 482         return NULL;
 483 }
 484 static void c_stop(struct seq_file *m, void *v)
 485 {
 486 }
 487 const struct seq_operations cpuinfo_op = {
 488         .start  = c_start,
 489         .next   = c_next,
 490         .stop   = c_stop,
 491         .show   = show_cpuinfo,
 492 };
 493
 494 #ifdef CONFIG_PROC_HARDWARE
 495 static int hardware_proc_show(struct seq_file *m, void *v)
 496 {
 497         char model[80];
 498         unsigned long mem;
 499         int i;
 500
 501         if (mach_get_model)
 502                 mach_get_model(model);
 503         else
 504                 strcpy(model, "Unknown m68k");
 505
 506         seq_printf(m, "Model:\t\t%s\n", model);
 507         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 508                 mem += m68k_memory[i].size;
 509         seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
 510
 511         if (mach_get_hardware_list)
 512                 mach_get_hardware_list(m);
 513
 514         return 0;
 515 }
 516
 517 static int hardware_proc_open(struct inode *inode, struct file *file)
 518 {
 519         return single_open(file, hardware_proc_show, NULL);
 520 }
 521
 522 static const struct file_operations hardware_proc_fops = {
 523         .open           = hardware_proc_open,
 524         .read           = seq_read,
 525         .llseek         = seq_lseek,
 526         .release        = single_release,
 527 };
 528
 529 static int __init proc_hardware_init(void)
 530 {
 531         proc_create("hardware", 0, NULL, &hardware_proc_fops);
 532         return 0;
 533 }
 534 module_init(proc_hardware_init);
 535 #endif
 536
 537 void check_bugs(void)
 538 {
 539 #ifndef CONFIG_M68KFPU_EMU
 540         if (m68k_fputype == 0) {
 541                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 542                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 543                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 544                         "emulation project\n");
 545                 panic("no FPU");
 546         }
 547 #endif /* !CONFIG_M68KFPU_EMU */
 548 }
 549
 550 #ifdef CONFIG_ADB
 551 static int __init adb_probe_sync_enable (char *str) {
 552         extern int __adb_probe_sync;
 553         __adb_probe_sync = 1;
 554         return 1;
 555 }
 556
 557 __setup("adb_sync", adb_probe_sync_enable);
 558 #endif /* CONFIG_ADB */