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/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
  46 #if !FPSTATESIZE || !NR_IRQS
  47 #warning No CPU/platform type selected, your kernel will not work!
  48 #warning Are you building an allnoconfig kernel?
  49 #endif
  50
  51 unsigned long m68k_machtype;
  52 EXPORT_SYMBOL(m68k_machtype);
  53 unsigned long m68k_cputype;
  54 EXPORT_SYMBOL(m68k_cputype);
  55 unsigned long m68k_fputype;
  56 unsigned long m68k_mmutype;
  57 EXPORT_SYMBOL(m68k_mmutype);
  58 #ifdef CONFIG_VME
  59 unsigned long vme_brdtype;
  60 EXPORT_SYMBOL(vme_brdtype);
  61 #endif
  62
  63 int m68k_is040or060;
  64 EXPORT_SYMBOL(m68k_is040or060);
  65
  66 extern unsigned long availmem;
  67
  68 int m68k_num_memory;
  69 EXPORT_SYMBOL(m68k_num_memory);
  70 int m68k_realnum_memory;
  71 EXPORT_SYMBOL(m68k_realnum_memory);
  72 unsigned long m68k_memoffset;
  73 struct mem_info m68k_memory[NUM_MEMINFO];
  74 EXPORT_SYMBOL(m68k_memory);
  75
  76 struct mem_info m68k_ramdisk;
  77
  78 //if there is uboot support, do it uboot way
  79 #ifdef CONFIG_UBOOT
  80 char m68k_command_line[CL_SIZE];
  81 #else
  82 static char m68k_command_line[CL_SIZE];
  83 #endif
  84
  85 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  86 /* machine dependent irq functions */
  87 void (*mach_init_IRQ) (void) __initdata = NULL;
  88 void (*mach_get_model) (char *model);
  89 void (*mach_get_hardware_list) (struct seq_file *m);
  90 /* machine dependent timer functions */
  91 unsigned long (*mach_gettimeoffset) (void);
  92 int (*mach_hwclk) (int, struct rtc_time*);
  93 EXPORT_SYMBOL(mach_hwclk);
  94 int (*mach_set_clock_mmss) (unsigned long);
  95 unsigned int (*mach_get_ss)(void);
  96 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  97 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  98 EXPORT_SYMBOL(mach_get_ss);
  99 EXPORT_SYMBOL(mach_get_rtc_pll);
 100 EXPORT_SYMBOL(mach_set_rtc_pll);
 101 void (*mach_reset)( void );
 102 void (*mach_halt)( void );
 103 void (*mach_power_off)( void );
 104 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
 105 #ifdef CONFIG_HEARTBEAT
 106 void (*mach_heartbeat) (int);
 107 EXPORT_SYMBOL(mach_heartbeat);
 108 #endif
 109 #ifdef CONFIG_M68K_L2_CACHE
 110 void (*mach_l2_flush) (int);
 111 #endif
 112 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 113 void (*mach_beep)(unsigned int, unsigned int);
 114 EXPORT_SYMBOL(mach_beep);
 115 #endif
 116 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 117 int isa_type;
 118 int isa_sex;
 119 EXPORT_SYMBOL(isa_type);
 120 EXPORT_SYMBOL(isa_sex);
 121 #endif
 122
 123 extern int amiga_parse_bootinfo(const struct bi_record *);
 124 extern int atari_parse_bootinfo(const struct bi_record *);
 125 extern int mac_parse_bootinfo(const struct bi_record *);
 126 extern int q40_parse_bootinfo(const struct bi_record *);
 127 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 128 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 129 extern int mvme147_parse_bootinfo(const struct bi_record *);
 130 extern int hp300_parse_bootinfo(const struct bi_record *);
 131 extern int apollo_parse_bootinfo(const struct bi_record *);
 132 extern int coldfire_parse_bootinfo(const struct bi_record *);
 133
 134 extern void config_amiga(void);
 135 extern void config_atari(void);
 136 extern void config_mac(void);
 137 extern void config_sun3(void);
 138 extern void config_apollo(void);
 139 extern void config_mvme147(void);
 140 extern void config_mvme16x(void);
 141 extern void config_bvme6000(void);
 142 extern void config_hp300(void);
 143 extern void config_q40(void);
 144 extern void config_sun3x(void);
 145 extern void config_coldfire(void);
 146
 147 #define MASK_256K 0xfffc0000
 148
 149 extern void paging_init(void);
 150
 151 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 152 {
 153         while (record->tag != BI_LAST) {
 154                 int unknown = 0;
 155                 const unsigned long *data = record->data;
 156
 157                 switch (record->tag) {
 158                 case BI_MACHTYPE:
 159                 case BI_CPUTYPE:
 160                 case BI_FPUTYPE:
 161                 case BI_MMUTYPE:
 162                         /* Already set up by head.S */
 163                         /* In case of Coldfire it's set up in config.c*/
 164                         break;
 165
 166                 case BI_MEMCHUNK:
 167                         if (m68k_num_memory < NUM_MEMINFO) {
 168                                 m68k_memory[m68k_num_memory].addr = data[0];
 169                                 m68k_memory[m68k_num_memory].size = data[1];
 170                                 m68k_num_memory++;
 171                         } else
 172                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 173                         break;
 174
 175                 case BI_RAMDISK:
 176 //if U-boot then ignore
 177 #ifndef CONFIG_UBOOT
 178                         m68k_ramdisk.addr = data[0];
 179                         m68k_ramdisk.size = data[1];
 180 #endif
 181                         break;
 182
 183                 case BI_COMMAND_LINE:
 184 //if U-boot then ignore
 185 #ifndef CONFIG_UBOOT
 186                         strlcpy(m68k_command_line, (const char *)data,
 187                                 sizeof(m68k_command_line));
 188 #endif
 189                         break;
 190
 191                 default:
 192                         if (MACH_IS_AMIGA)
 193                                 unknown = amiga_parse_bootinfo(record);
 194                         else if (MACH_IS_ATARI)
 195                                 unknown = atari_parse_bootinfo(record);
 196                         else if (MACH_IS_MAC)
 197                                 unknown = mac_parse_bootinfo(record);
 198                         else if (MACH_IS_Q40)
 199                                 unknown = q40_parse_bootinfo(record);
 200                         else if (MACH_IS_BVME6000)
 201                                 unknown = bvme6000_parse_bootinfo(record);
 202                         else if (MACH_IS_MVME16x)
 203                                 unknown = mvme16x_parse_bootinfo(record);
 204                         else if (MACH_IS_MVME147)
 205                                 unknown = mvme147_parse_bootinfo(record);
 206                         else if (MACH_IS_HP300)
 207                                 unknown = hp300_parse_bootinfo(record);
 208                         else if (MACH_IS_APOLLO)
 209                                 unknown = apollo_parse_bootinfo(record);
 210                         else if (MACH_IS_COLDFIRE)
 211                                 unknown = coldfire_parse_bootinfo(record);
 212                         else if
 213                                 unknown = 1;
 214                 }
 215                 if (unknown)
 216                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 217                                record->tag);
 218                 record = (struct bi_record *)((unsigned long)record +
 219                                               record->size);
 220         }
 221
 222 #ifdef CONFIG_COLDFIRE
 223         if (MACH_IS_COLDFIRE)
 224     coldfire_sort_memrec();
 225 #endif
 226
 227         m68k_realnum_memory = m68k_num_memory;
 228 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 229         if (m68k_num_memory > 1) {
 230                 printk("Ignoring last %i chunks of physical memory\n",
 231                        (m68k_num_memory - 1));
 232                 m68k_num_memory = 1;
 233         }
 234 #endif
 235 }
 236
 237 void __init setup_arch(char **cmdline_p)
 238 {
 239         int i;
 240
 241         /* The bootinfo is located right after the kernel bss */
 242         m68k_parse_bootinfo((const struct bi_record *)_end);
 243
 244         if (CPU_IS_040)
 245                 m68k_is040or060 = 4;
 246         else if (CPU_IS_060)
 247                 m68k_is040or060 = 6;
 248
 249         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 250          * be confused by software FPU emulation. BEWARE.
 251          * We should really do our own FPU check at startup.
 252          * [what do we do with buggy 68LC040s? if we have problems
 253          *  with them, we should add a test to check_bugs() below] */
 254 #ifndef CONFIG_M68KFPU_EMU_ONLY
 255         /* clear the fpu if we have one */
 256         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 257                 volatile int zero = 0;
 258                 asm volatile ("frestore %0" : : "m" (zero));
 259         }
 260 #endif
 261
 262         if (CPU_IS_060) {
 263                 u32 pcr;
 264
 265                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 266                      : "=d" (pcr));
 267                 if (((pcr >> 8) & 0xff) <= 5) {
 268                         printk("Enabling workaround for errata I14\n");
 269                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 270                              : : "d" (pcr | 0x20));
 271                 }
 272         }
 273
 274         init_mm.start_code = PAGE_OFFSET;
 275         init_mm.end_code = (unsigned long)_etext;
 276         init_mm.end_data = (unsigned long)_edata;
 277         init_mm.brk = (unsigned long)_end;
 278
 279         *cmdline_p = m68k_command_line;
 280         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 281
 282         parse_early_param();
 283
 284 #ifdef CONFIG_DUMMY_CONSOLE
 285         conswitchp = &dummy_con;
 286 #endif
 287
 288         switch (m68k_machtype) {
 289 #ifdef CONFIG_AMIGA
 290         case MACH_AMIGA:
 291                 config_amiga();
 292                 break;
 293 #endif
 294 #ifdef CONFIG_ATARI
 295         case MACH_ATARI:
 296                 config_atari();
 297                 break;
 298 #endif
 299 #ifdef CONFIG_MAC
 300         case MACH_MAC:
 301                 config_mac();
 302                 break;
 303 #endif
 304 #ifdef CONFIG_SUN3
 305         case MACH_SUN3:
 306                 config_sun3();
 307                 break;
 308 #endif
 309 #ifdef CONFIG_APOLLO
 310         case MACH_APOLLO:
 311                 config_apollo();
 312                 break;
 313 #endif
 314 #ifdef CONFIG_MVME147
 315         case MACH_MVME147:
 316                 config_mvme147();
 317                 break;
 318 #endif
 319 #ifdef CONFIG_MVME16x
 320         case MACH_MVME16x:
 321                 config_mvme16x();
 322                 break;
 323 #endif
 324 #ifdef CONFIG_BVME6000
 325         case MACH_BVME6000:
 326                 config_bvme6000();
 327                 break;
 328 #endif
 329 #ifdef CONFIG_HP300
 330         case MACH_HP300:
 331                 config_hp300();
 332                 break;
 333 #endif
 334 #ifdef CONFIG_Q40
 335         case MACH_Q40:
 336                 config_q40();
 337                 break;
 338 #endif
 339 #ifdef CONFIG_SUN3X
 340         case MACH_SUN3X:
 341                 config_sun3x();
 342                 break;
 343 #endif
 344 #ifdef CONFIG_COLDFIRE
 345         case MACH_COLDFIRE:
 346                 config_coldfire();
 347                 break;
 348 #endif
 349         default:
 350                 panic("No configuration setup");
 351         }
 352
 353         paging_init();
 354
 355 #ifndef CONFIG_SUN3
 356         for (i = 1; i < m68k_num_memory; i++)
 357                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 358                                   m68k_memory[i].size);
 359 #ifdef CONFIG_BLK_DEV_INITRD
 360         if (m68k_ramdisk.size) {
 361                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 362                                      m68k_ramdisk.addr, m68k_ramdisk.size,
 363                                      BOOTMEM_DEFAULT);
 364                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 365                 initrd_end = initrd_start + m68k_ramdisk.size;
 366                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 367         }
 368 #endif
 369
 370 #ifdef CONFIG_ATARI
 371         if (MACH_IS_ATARI)
 372                 atari_stram_reserve_pages((void *)availmem);
 373 #endif
 374 #ifdef CONFIG_SUN3X
 375         if (MACH_IS_SUN3X) {
 376                 dvma_init();
 377         }
 378 #endif
 379
 380 #endif /* !CONFIG_SUN3 */
 381
 382 #ifdef CONFIG_COLDFIRE
 383         if (MACH_IS_COLDFIRE)
 384                 mmu_context_init();
 385 #endif
 386
 387 /* set ISA defs early as possible */
 388 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 389         if (MACH_IS_Q40) {
 390                 isa_type = ISA_TYPE_Q40;
 391                 isa_sex = 0;
 392         }
 393 #ifdef CONFIG_AMIGA_PCMCIA
 394         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 395                 isa_type = ISA_TYPE_AG;
 396                 isa_sex = 1;
 397         }
 398 #endif
 399 #endif
 400 }
 401
 402 static int show_cpuinfo(struct seq_file *m, void *v)
 403 {
 404         const char *cpu, *mmu, *fpu;
 405         unsigned long clockfreq, clockfactor;
 406
 407 #define LOOP_CYCLES_68020       (8)
 408 #define LOOP_CYCLES_68030       (8)
 409 #define LOOP_CYCLES_68040       (3)
 410 #define LOOP_CYCLES_68060       (1)
 411
 412         if (CPU_IS_020) {
 413                 cpu = "68020";
 414                 clockfactor = LOOP_CYCLES_68020;
 415         } else if (CPU_IS_030) {
 416                 cpu = "68030";
 417                 clockfactor = LOOP_CYCLES_68030;
 418         } else if (CPU_IS_040) {
 419                 cpu = "68040";
 420                 clockfactor = LOOP_CYCLES_68040;
 421         } else if (CPU_IS_060) {
 422                 cpu = "68060";
 423                 clockfactor = LOOP_CYCLES_68060;
 424         } else if (CPU_IS_CFV4E) {
 425                 cpu = "ColdFire V4e";
 426                 clockfactor = LOOP_CYCLES_COLDFIRE;
 427         } else {
 428                 cpu = "680x0";
 429                 clockfactor = 0;
 430         }
 431
 432 #ifdef CONFIG_M68KFPU_EMU_ONLY
 433         fpu = "none(soft float)";
 434 #else
 435         if (m68k_fputype & FPU_68881)
 436                 fpu = "68881";
 437         else if (m68k_fputype & FPU_68882)
 438                 fpu = "68882";
 439         else if (m68k_fputype & FPU_68040)
 440                 fpu = "68040";
 441         else if (m68k_fputype & FPU_68060)
 442                 fpu = "68060";
 443         else if (m68k_fputype & FPU_SUNFPA)
 444                 fpu = "Sun FPA";
 445         else if (m68k_fputype & FPU_CFV4E)
 446                 fpu = "ColdFire V4e";
 447         else
 448                 fpu = "none";
 449 #endif
 450
 451         if (m68k_mmutype & MMU_68851)
 452                 mmu = "68851";
 453         else if (m68k_mmutype & MMU_68030)
 454                 mmu = "68030";
 455         else if (m68k_mmutype & MMU_68040)
 456                 mmu = "68040";
 457         else if (m68k_mmutype & MMU_68060)
 458                 mmu = "68060";
 459         else if (m68k_mmutype & MMU_SUN3)
 460                 mmu = "Sun-3";
 461         else if (m68k_mmutype & MMU_APOLLO)
 462                 mmu = "Apollo";
 463         else if (m68k_mmutype & MMU_CFV4E)
 464                 mmu = "ColdFire";
 465         else
 466                 mmu = "unknown";
 467
 468         clockfreq = loops_per_jiffy * HZ * clockfactor;
 469
 470         seq_printf(m, "CPU:\t\t%s\n"
 471                    "MMU:\t\t%s\n"
 472                    "FPU:\t\t%s\n"
 473                    "Clocking:\t%lu.%1luMHz\n"
 474                    "BogoMips:\t%lu.%02lu\n"
 475                    "Calibration:\t%lu loops\n",
 476                    cpu, mmu, fpu,
 477                    clockfreq/1000000,(clockfreq/100000)%10,
 478                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 479                    loops_per_jiffy);
 480         return 0;
 481 }
 482
 483 static void *c_start(struct seq_file *m, loff_t *pos)
 484 {
 485         return *pos < 1 ? (void *)1 : NULL;
 486 }
 487 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 488 {
 489         ++*pos;
 490         return NULL;
 491 }
 492 static void c_stop(struct seq_file *m, void *v)
 493 {
 494 }
 495 const struct seq_operations cpuinfo_op = {
 496         .start  = c_start,
 497         .next   = c_next,
 498         .stop   = c_stop,
 499         .show   = show_cpuinfo,
 500 };
 501
 502 #ifdef CONFIG_PROC_HARDWARE
 503 static int hardware_proc_show(struct seq_file *m, void *v)
 504 {
 505         char model[80];
 506         unsigned long mem;
 507         int i;
 508
 509         if (mach_get_model)
 510                 mach_get_model(model);
 511         else
 512                 strcpy(model, "Unknown m68k");
 513
 514         seq_printf(m, "Model:\t\t%s\n", model);
 515         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 516                 mem += m68k_memory[i].size;
 517         seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
 518
 519         if (mach_get_hardware_list)
 520                 mach_get_hardware_list(m);
 521
 522         return 0;
 523 }
 524
 525 static int hardware_proc_open(struct inode *inode, struct file *file)
 526 {
 527         return single_open(file, hardware_proc_show, NULL);
 528 }
 529
 530 static const struct file_operations hardware_proc_fops = {
 531         .open           = hardware_proc_open,
 532         .read           = seq_read,
 533         .llseek         = seq_lseek,
 534         .release        = single_release,
 535 };
 536
 537 static int __init proc_hardware_init(void)
 538 {
 539         proc_create("hardware", 0, NULL, &hardware_proc_fops);
 540         return 0;
 541 }
 542 module_init(proc_hardware_init);
 543 #endif
 544
 545 void check_bugs(void)
 546 {
 547 #ifndef CONFIG_M68KFPU_EMU
 548         if (m68k_fputype == 0) {
 549                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 550                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 551                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 552                         "emulation project\n");
 553                 panic("no FPU");
 554         }
 555 #endif /* !CONFIG_M68KFPU_EMU */
 556 }
 557
 558 #ifdef CONFIG_ADB
 559 static int __init adb_probe_sync_enable (char *str) {
 560         extern int __adb_probe_sync;
 561         __adb_probe_sync = 1;
 562         return 1;
 563 }
 564
 565 __setup("adb_sync", adb_probe_sync_enable);
 566 #endif /* CONFIG_ADB */