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/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 EXPORT_SYMBOL(m68k_num_memory);
  62 int m68k_realnum_memory;
  63 EXPORT_SYMBOL(m68k_realnum_memory);
  64 unsigned long m68k_memoffset;
  65 struct mem_info m68k_memory[NUM_MEMINFO];
  66 EXPORT_SYMBOL(m68k_memory);
  67
  68 struct mem_info m68k_ramdisk;
  69
  70 static char m68k_command_line[CL_SIZE];
  71
  72 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  73 /* machine dependent irq functions */
  74 void (*mach_init_IRQ) (void) __initdata = NULL;
  75 void (*mach_get_model) (char *model);
  76 int (*mach_get_hardware_list) (char *buffer);
  77 /* machine dependent timer functions */
  78 unsigned long (*mach_gettimeoffset) (void);
  79 int (*mach_hwclk) (int, struct rtc_time*);
  80 EXPORT_SYMBOL(mach_hwclk);
  81 int (*mach_set_clock_mmss) (unsigned long);
  82 unsigned int (*mach_get_ss)(void);
  83 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  84 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  85 EXPORT_SYMBOL(mach_get_ss);
  86 EXPORT_SYMBOL(mach_get_rtc_pll);
  87 EXPORT_SYMBOL(mach_set_rtc_pll);
  88 void (*mach_reset)( void );
  89 void (*mach_halt)( void );
  90 void (*mach_power_off)( void );
  91 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
  92 #ifdef CONFIG_HEARTBEAT
  93 void (*mach_heartbeat) (int);
  94 EXPORT_SYMBOL(mach_heartbeat);
  95 #endif
  96 #ifdef CONFIG_M68K_L2_CACHE
  97 void (*mach_l2_flush) (int);
  98 #endif
  99 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 100 void (*mach_beep)(unsigned int, unsigned int);
 101 EXPORT_SYMBOL(mach_beep);
 102 #endif
 103 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 104 int isa_type;
 105 int isa_sex;
 106 EXPORT_SYMBOL(isa_type);
 107 EXPORT_SYMBOL(isa_sex);
 108 #endif
 109
 110 extern int amiga_parse_bootinfo(const struct bi_record *);
 111 extern int atari_parse_bootinfo(const struct bi_record *);
 112 extern int mac_parse_bootinfo(const struct bi_record *);
 113 extern int q40_parse_bootinfo(const struct bi_record *);
 114 extern int bvme6000_parse_bootinfo(const struct bi_record *);
 115 extern int mvme16x_parse_bootinfo(const struct bi_record *);
 116 extern int mvme147_parse_bootinfo(const struct bi_record *);
 117 extern int hp300_parse_bootinfo(const struct bi_record *);
 118
 119 extern void config_amiga(void);
 120 extern void config_atari(void);
 121 extern void config_mac(void);
 122 extern void config_sun3(void);
 123 extern void config_apollo(void);
 124 extern void config_mvme147(void);
 125 extern void config_mvme16x(void);
 126 extern void config_bvme6000(void);
 127 extern void config_hp300(void);
 128 extern void config_q40(void);
 129 extern void config_sun3x(void);
 130
 131 #define MASK_256K 0xfffc0000
 132
 133 extern void paging_init(void);
 134
 135 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 136 {
 137         while (record->tag != BI_LAST) {
 138                 int unknown = 0;
 139                 const unsigned long *data = record->data;
 140
 141                 switch (record->tag) {
 142                 case BI_MACHTYPE:
 143                 case BI_CPUTYPE:
 144                 case BI_FPUTYPE:
 145                 case BI_MMUTYPE:
 146                         /* Already set up by head.S */
 147                         break;
 148
 149                 case BI_MEMCHUNK:
 150                         if (m68k_num_memory < NUM_MEMINFO) {
 151                                 m68k_memory[m68k_num_memory].addr = data[0];
 152                                 m68k_memory[m68k_num_memory].size = data[1];
 153                                 m68k_num_memory++;
 154                         } else
 155                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 156                         break;
 157
 158                 case BI_RAMDISK:
 159                         m68k_ramdisk.addr = data[0];
 160                         m68k_ramdisk.size = data[1];
 161                         break;
 162
 163                 case BI_COMMAND_LINE:
 164                         strlcpy(m68k_command_line, (const char *)data,
 165                                 sizeof(m68k_command_line));
 166                         break;
 167
 168                 default:
 169                         if (MACH_IS_AMIGA)
 170                                 unknown = amiga_parse_bootinfo(record);
 171                         else if (MACH_IS_ATARI)
 172                                 unknown = atari_parse_bootinfo(record);
 173                         else if (MACH_IS_MAC)
 174                                 unknown = mac_parse_bootinfo(record);
 175                         else if (MACH_IS_Q40)
 176                                 unknown = q40_parse_bootinfo(record);
 177                         else if (MACH_IS_BVME6000)
 178                                 unknown = bvme6000_parse_bootinfo(record);
 179                         else if (MACH_IS_MVME16x)
 180                                 unknown = mvme16x_parse_bootinfo(record);
 181                         else if (MACH_IS_MVME147)
 182                                 unknown = mvme147_parse_bootinfo(record);
 183                         else if (MACH_IS_HP300)
 184                                 unknown = hp300_parse_bootinfo(record);
 185                         else
 186                                 unknown = 1;
 187                 }
 188                 if (unknown)
 189                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 190                                record->tag);
 191                 record = (struct bi_record *)((unsigned long)record +
 192                                               record->size);
 193         }
 194
 195         m68k_realnum_memory = m68k_num_memory;
 196 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 197         if (m68k_num_memory > 1) {
 198                 printk("Ignoring last %i chunks of physical memory\n",
 199                        (m68k_num_memory - 1));
 200                 m68k_num_memory = 1;
 201         }
 202 #endif
 203 }
 204
 205 void __init setup_arch(char **cmdline_p)
 206 {
 207         extern int _etext, _edata, _end;
 208         int i;
 209
 210         /* The bootinfo is located right after the kernel bss */
 211         m68k_parse_bootinfo((const struct bi_record *)&_end);
 212
 213         if (CPU_IS_040)
 214                 m68k_is040or060 = 4;
 215         else if (CPU_IS_060)
 216                 m68k_is040or060 = 6;
 217
 218         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 219          * be confused by software FPU emulation. BEWARE.
 220          * We should really do our own FPU check at startup.
 221          * [what do we do with buggy 68LC040s? if we have problems
 222          *  with them, we should add a test to check_bugs() below] */
 223 #ifndef CONFIG_M68KFPU_EMU_ONLY
 224         /* clear the fpu if we have one */
 225         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 226                 volatile int zero = 0;
 227                 asm volatile ("frestore %0" : : "m" (zero));
 228         }
 229 #endif
 230
 231         if (CPU_IS_060) {
 232                 u32 pcr;
 233
 234                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 235                      : "=d" (pcr));
 236                 if (((pcr >> 8) & 0xff) <= 5) {
 237                         printk("Enabling workaround for errata I14\n");
 238                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 239                              : : "d" (pcr | 0x20));
 240                 }
 241         }
 242
 243         init_mm.start_code = PAGE_OFFSET;
 244         init_mm.end_code = (unsigned long) &_etext;
 245         init_mm.end_data = (unsigned long) &_edata;
 246         init_mm.brk = (unsigned long) &_end;
 247
 248         *cmdline_p = m68k_command_line;
 249         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 250
 251         parse_early_param();
 252
 253 #ifdef CONFIG_DUMMY_CONSOLE
 254         conswitchp = &dummy_con;
 255 #endif
 256
 257         switch (m68k_machtype) {
 258 #ifdef CONFIG_AMIGA
 259         case MACH_AMIGA:
 260                 config_amiga();
 261                 break;
 262 #endif
 263 #ifdef CONFIG_ATARI
 264         case MACH_ATARI:
 265                 config_atari();
 266                 break;
 267 #endif
 268 #ifdef CONFIG_MAC
 269         case MACH_MAC:
 270                 config_mac();
 271                 break;
 272 #endif
 273 #ifdef CONFIG_SUN3
 274         case MACH_SUN3:
 275                 config_sun3();
 276                 break;
 277 #endif
 278 #ifdef CONFIG_APOLLO
 279         case MACH_APOLLO:
 280                 config_apollo();
 281                 break;
 282 #endif
 283 #ifdef CONFIG_MVME147
 284         case MACH_MVME147:
 285                 config_mvme147();
 286                 break;
 287 #endif
 288 #ifdef CONFIG_MVME16x
 289         case MACH_MVME16x:
 290                 config_mvme16x();
 291                 break;
 292 #endif
 293 #ifdef CONFIG_BVME6000
 294         case MACH_BVME6000:
 295                 config_bvme6000();
 296                 break;
 297 #endif
 298 #ifdef CONFIG_HP300
 299         case MACH_HP300:
 300                 config_hp300();
 301                 break;
 302 #endif
 303 #ifdef CONFIG_Q40
 304         case MACH_Q40:
 305                 config_q40();
 306                 break;
 307 #endif
 308 #ifdef CONFIG_SUN3X
 309         case MACH_SUN3X:
 310                 config_sun3x();
 311                 break;
 312 #endif
 313         default:
 314                 panic("No configuration setup");
 315         }
 316
 317         paging_init();
 318
 319 #ifndef CONFIG_SUN3
 320         for (i = 1; i < m68k_num_memory; i++)
 321                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 322                                   m68k_memory[i].size);
 323 #ifdef CONFIG_BLK_DEV_INITRD
 324         if (m68k_ramdisk.size) {
 325                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 326                                      m68k_ramdisk.addr, m68k_ramdisk.size);
 327                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 328                 initrd_end = initrd_start + m68k_ramdisk.size;
 329                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 330         }
 331 #endif
 332
 333 #ifdef CONFIG_ATARI
 334         if (MACH_IS_ATARI)
 335                 atari_stram_reserve_pages((void *)availmem);
 336 #endif
 337 #ifdef CONFIG_SUN3X
 338         if (MACH_IS_SUN3X) {
 339                 dvma_init();
 340         }
 341 #endif
 342
 343 #endif /* !CONFIG_SUN3 */
 344
 345 /* set ISA defs early as possible */
 346 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 347 #if defined(CONFIG_Q40)
 348         if (MACH_IS_Q40) {
 349                 isa_type = Q40_ISA;
 350                 isa_sex = 0;
 351         }
 352 #elif defined(CONFIG_GG2)
 353         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
 354                 isa_type = GG2_ISA;
 355                 isa_sex = 0;
 356         }
 357 #elif defined(CONFIG_AMIGA_PCMCIA)
 358         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 359                 isa_type = AG_ISA;
 360                 isa_sex = 1;
 361         }
 362 #endif
 363 #endif
 364 }
 365
 366 static int show_cpuinfo(struct seq_file *m, void *v)
 367 {
 368         const char *cpu, *mmu, *fpu;
 369         unsigned long clockfreq, clockfactor;
 370
 371 #define LOOP_CYCLES_68020       (8)
 372 #define LOOP_CYCLES_68030       (8)
 373 #define LOOP_CYCLES_68040       (3)
 374 #define LOOP_CYCLES_68060       (1)
 375
 376         if (CPU_IS_020) {
 377                 cpu = "68020";
 378                 clockfactor = LOOP_CYCLES_68020;
 379         } else if (CPU_IS_030) {
 380                 cpu = "68030";
 381                 clockfactor = LOOP_CYCLES_68030;
 382         } else if (CPU_IS_040) {
 383                 cpu = "68040";
 384                 clockfactor = LOOP_CYCLES_68040;
 385         } else if (CPU_IS_060) {
 386                 cpu = "68060";
 387                 clockfactor = LOOP_CYCLES_68060;
 388         } else {
 389                 cpu = "680x0";
 390                 clockfactor = 0;
 391         }
 392
 393 #ifdef CONFIG_M68KFPU_EMU_ONLY
 394         fpu = "none(soft float)";
 395 #else
 396         if (m68k_fputype & FPU_68881)
 397                 fpu = "68881";
 398         else if (m68k_fputype & FPU_68882)
 399                 fpu = "68882";
 400         else if (m68k_fputype & FPU_68040)
 401                 fpu = "68040";
 402         else if (m68k_fputype & FPU_68060)
 403                 fpu = "68060";
 404         else if (m68k_fputype & FPU_SUNFPA)
 405                 fpu = "Sun FPA";
 406         else
 407                 fpu = "none";
 408 #endif
 409
 410         if (m68k_mmutype & MMU_68851)
 411                 mmu = "68851";
 412         else if (m68k_mmutype & MMU_68030)
 413                 mmu = "68030";
 414         else if (m68k_mmutype & MMU_68040)
 415                 mmu = "68040";
 416         else if (m68k_mmutype & MMU_68060)
 417                 mmu = "68060";
 418         else if (m68k_mmutype & MMU_SUN3)
 419                 mmu = "Sun-3";
 420         else if (m68k_mmutype & MMU_APOLLO)
 421                 mmu = "Apollo";
 422         else
 423                 mmu = "unknown";
 424
 425         clockfreq = loops_per_jiffy * HZ * clockfactor;
 426
 427         seq_printf(m, "CPU:\t\t%s\n"
 428                    "MMU:\t\t%s\n"
 429                    "FPU:\t\t%s\n"
 430                    "Clocking:\t%lu.%1luMHz\n"
 431                    "BogoMips:\t%lu.%02lu\n"
 432                    "Calibration:\t%lu loops\n",
 433                    cpu, mmu, fpu,
 434                    clockfreq/1000000,(clockfreq/100000)%10,
 435                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 436                    loops_per_jiffy);
 437         return 0;
 438 }
 439
 440 static void *c_start(struct seq_file *m, loff_t *pos)
 441 {
 442         return *pos < 1 ? (void *)1 : NULL;
 443 }
 444 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 445 {
 446         ++*pos;
 447         return NULL;
 448 }
 449 static void c_stop(struct seq_file *m, void *v)
 450 {
 451 }
 452 struct seq_operations cpuinfo_op = {
 453         .start  = c_start,
 454         .next   = c_next,
 455         .stop   = c_stop,
 456         .show   = show_cpuinfo,
 457 };
 458
 459 int get_hardware_list(char *buffer)
 460 {
 461         int len = 0;
 462         char model[80];
 463         unsigned long mem;
 464         int i;
 465
 466         if (mach_get_model)
 467                 mach_get_model(model);
 468         else
 469                 strcpy(model, "Unknown m68k");
 470
 471         len += sprintf(buffer + len, "Model:\t\t%s\n", model);
 472         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 473                 mem += m68k_memory[i].size;
 474         len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
 475
 476         if (mach_get_hardware_list)
 477                 len += mach_get_hardware_list(buffer + len);
 478
 479         return len;
 480 }
 481
 482 void check_bugs(void)
 483 {
 484 #ifndef CONFIG_M68KFPU_EMU
 485         if (m68k_fputype == 0) {
 486                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 487                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 488                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 489                         "emulation project\n");
 490                 panic("no FPU");
 491         }
 492 #endif /* !CONFIG_M68KFPU_EMU */
 493 }
 494
 495 #ifdef CONFIG_ADB
 496 static int __init adb_probe_sync_enable (char *str) {
 497         extern int __adb_probe_sync;
 498         __adb_probe_sync = 1;
 499         return 1;
 500 }
 501
 502 __setup("adb_sync", adb_probe_sync_enable);
 503 #endif /* CONFIG_ADB */