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 #ifdef CONFIG_COLDFIRE
 135 void coldfire_sort_memrec(void);
 136 #endif
 137
 138 extern void config_amiga(void);
 139 extern void config_atari(void);
 140 extern void config_mac(void);
 141 extern void config_sun3(void);
 142 extern void config_apollo(void);
 143 extern void config_mvme147(void);
 144 extern void config_mvme16x(void);
 145 extern void config_bvme6000(void);
 146 extern void config_hp300(void);
 147 extern void config_q40(void);
 148 extern void config_sun3x(void);
 149 extern void config_coldfire(void);
 150
 151 #define MASK_256K 0xfffc0000
 152
 153 extern void paging_init(void);
 154
 155 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 156 {
 157         while (record->tag != BI_LAST) {
 158                 int unknown = 0;
 159                 const unsigned long *data = record->data;
 160
 161                 switch (record->tag) {
 162                 case BI_MACHTYPE:
 163                 case BI_CPUTYPE:
 164                 case BI_FPUTYPE:
 165                 case BI_MMUTYPE:
 166                         /* Already set up by head.S */
 167                         /* In case of Coldfire it's set up in config.c*/
 168                         break;
 169
 170                 case BI_MEMCHUNK:
 171                         if (m68k_num_memory < NUM_MEMINFO) {
 172                                 m68k_memory[m68k_num_memory].addr = data[0];
 173                                 m68k_memory[m68k_num_memory].size = data[1];
 174                                 m68k_num_memory++;
 175                         } else
 176                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
 177                         break;
 178
 179                 case BI_RAMDISK:
 180 //if U-boot then ignore
 181 #ifndef CONFIG_UBOOT
 182                         m68k_ramdisk.addr = data[0];
 183                         m68k_ramdisk.size = data[1];
 184 #endif
 185                         break;
 186
 187                 case BI_COMMAND_LINE:
 188 //if U-boot then ignore
 189 #ifndef CONFIG_UBOOT
 190                         strlcpy(m68k_command_line, (const char *)data,
 191                                 sizeof(m68k_command_line));
 192 #endif
 193                         break;
 194
 195                 default:
 196                         if (MACH_IS_AMIGA)
 197                                 unknown = amiga_parse_bootinfo(record);
 198                         else if (MACH_IS_ATARI)
 199                                 unknown = atari_parse_bootinfo(record);
 200                         else if (MACH_IS_MAC)
 201                                 unknown = mac_parse_bootinfo(record);
 202                         else if (MACH_IS_Q40)
 203                                 unknown = q40_parse_bootinfo(record);
 204                         else if (MACH_IS_BVME6000)
 205                                 unknown = bvme6000_parse_bootinfo(record);
 206                         else if (MACH_IS_MVME16x)
 207                                 unknown = mvme16x_parse_bootinfo(record);
 208                         else if (MACH_IS_MVME147)
 209                                 unknown = mvme147_parse_bootinfo(record);
 210                         else if (MACH_IS_HP300)
 211                                 unknown = hp300_parse_bootinfo(record);
 212                         else if (MACH_IS_APOLLO)
 213                                 unknown = apollo_parse_bootinfo(record);
 214                         else if (MACH_IS_COLDFIRE)
 215                                 unknown = coldfire_parse_bootinfo(record);
 216                         else
 217                                 unknown = 1;
 218                 }
 219                 if (unknown)
 220                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 221                                record->tag);
 222                 record = (struct bi_record *)((unsigned long)record +
 223                                               record->size);
 224         }
 225
 226 #ifdef CONFIG_COLDFIRE
 227         if (MACH_IS_COLDFIRE)
 228     coldfire_sort_memrec();
 229 #endif
 230
 231         m68k_realnum_memory = m68k_num_memory;
 232 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 233         if (m68k_num_memory > 1) {
 234                 printk("Ignoring last %i chunks of physical memory\n",
 235                        (m68k_num_memory - 1));
 236                 m68k_num_memory = 1;
 237         }
 238 #endif
 239 }
 240
 241 void __init setup_arch(char **cmdline_p)
 242 {
 243         int i;
 244
 245         /* The bootinfo is located right after the kernel bss */
 246         m68k_parse_bootinfo((const struct bi_record *)_end);
 247
 248         if (CPU_IS_040)
 249                 m68k_is040or060 = 4;
 250         else if (CPU_IS_060)
 251                 m68k_is040or060 = 6;
 252
 253         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 254          * be confused by software FPU emulation. BEWARE.
 255          * We should really do our own FPU check at startup.
 256          * [what do we do with buggy 68LC040s? if we have problems
 257          *  with them, we should add a test to check_bugs() below] */
 258 #ifndef CONFIG_M68KFPU_EMU_ONLY
 259         /* clear the fpu if we have one */
 260         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 261                 volatile int zero = 0;
 262                 asm volatile ("frestore %0" : : "m" (zero));
 263         }
 264 #endif
 265
 266         if (CPU_IS_060) {
 267                 u32 pcr;
 268
 269                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 270                      : "=d" (pcr));
 271                 if (((pcr >> 8) & 0xff) <= 5) {
 272                         printk("Enabling workaround for errata I14\n");
 273                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 274                              : : "d" (pcr | 0x20));
 275                 }
 276         }
 277
 278         init_mm.start_code = PAGE_OFFSET;
 279         init_mm.end_code = (unsigned long)_etext;
 280         init_mm.end_data = (unsigned long)_edata;
 281         init_mm.brk = (unsigned long)_end;
 282
 283         *cmdline_p = m68k_command_line;
 284         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 285
 286         parse_early_param();
 287
 288 #ifdef CONFIG_DUMMY_CONSOLE
 289         conswitchp = &dummy_con;
 290 #endif
 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 #ifdef CONFIG_COLDFIRE
 349         case MACH_CFMMU:
 350                 config_coldfire();
 351                 break;
 352 #endif
 353         default:
 354                 panic("No configuration setup");
 355         }
 356
 357         paging_init();
 358
 359 #ifndef CONFIG_SUN3
 360         for (i = 1; i < m68k_num_memory; i++)
 361                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 362                                   m68k_memory[i].size);
 363 #ifdef CONFIG_BLK_DEV_INITRD
 364         if (m68k_ramdisk.size) {
 365                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 366                                      m68k_ramdisk.addr, m68k_ramdisk.size,
 367                                      BOOTMEM_DEFAULT);
 368                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 369                 initrd_end = initrd_start + m68k_ramdisk.size;
 370                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 371         }
 372 #endif
 373
 374 #ifdef CONFIG_ATARI
 375         if (MACH_IS_ATARI)
 376                 atari_stram_reserve_pages((void *)availmem);
 377 #endif
 378 #ifdef CONFIG_SUN3X
 379         if (MACH_IS_SUN3X) {
 380                 dvma_init();
 381         }
 382 #endif
 383
 384 #endif /* !CONFIG_SUN3 */
 385
 386 #ifdef CONFIG_COLDFIRE
 387         if (MACH_IS_COLDFIRE)
 388                 mmu_context_init();
 389 #endif
 390
 391 /* set ISA defs early as possible */
 392 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 393         if (MACH_IS_Q40) {
 394                 isa_type = ISA_TYPE_Q40;
 395                 isa_sex = 0;
 396         }
 397 #ifdef CONFIG_AMIGA_PCMCIA
 398         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 399                 isa_type = ISA_TYPE_AG;
 400                 isa_sex = 1;
 401         }
 402 #endif
 403 #endif
 404 }
 405
 406 static int show_cpuinfo(struct seq_file *m, void *v)
 407 {
 408         const char *cpu, *mmu, *fpu;
 409         unsigned long clockfreq, clockfactor;
 410
 411 #define LOOP_CYCLES_68020       (8)
 412 #define LOOP_CYCLES_68030       (8)
 413 #define LOOP_CYCLES_68040       (3)
 414 #define LOOP_CYCLES_68060       (1)
 415 #define LOOP_CYCLES_COLDFIRE    (2)
 416
 417         if (CPU_IS_020) {
 418                 cpu = "68020";
 419                 clockfactor = LOOP_CYCLES_68020;
 420         } else if (CPU_IS_030) {
 421                 cpu = "68030";
 422                 clockfactor = LOOP_CYCLES_68030;
 423         } else if (CPU_IS_040) {
 424                 cpu = "68040";
 425                 clockfactor = LOOP_CYCLES_68040;
 426         } else if (CPU_IS_060) {
 427                 cpu = "68060";
 428                 clockfactor = LOOP_CYCLES_68060;
 429         } else if (CPU_IS_CFV4E) {
 430                 cpu = "ColdFire V4e";
 431                 clockfactor = LOOP_CYCLES_COLDFIRE;
 432         } else {
 433                 cpu = "680x0";
 434                 clockfactor = 0;
 435         }
 436
 437 #ifdef CONFIG_M68KFPU_EMU_ONLY
 438         fpu = "none(soft float)";
 439 #else
 440         if (m68k_fputype & FPU_68881)
 441                 fpu = "68881";
 442         else if (m68k_fputype & FPU_68882)
 443                 fpu = "68882";
 444         else if (m68k_fputype & FPU_68040)
 445                 fpu = "68040";
 446         else if (m68k_fputype & FPU_68060)
 447                 fpu = "68060";
 448         else if (m68k_fputype & FPU_SUNFPA)
 449                 fpu = "Sun FPA";
 450         else if (m68k_fputype & FPU_CFV4E)
 451                 fpu = "ColdFire V4e";
 452         else
 453                 fpu = "none";
 454 #endif
 455
 456         if (m68k_mmutype & MMU_68851)
 457                 mmu = "68851";
 458         else if (m68k_mmutype & MMU_68030)
 459                 mmu = "68030";
 460         else if (m68k_mmutype & MMU_68040)
 461                 mmu = "68040";
 462         else if (m68k_mmutype & MMU_68060)
 463                 mmu = "68060";
 464         else if (m68k_mmutype & MMU_SUN3)
 465                 mmu = "Sun-3";
 466         else if (m68k_mmutype & MMU_APOLLO)
 467                 mmu = "Apollo";
 468         else if (m68k_mmutype & MMU_CFV4E)
 469                 mmu = "ColdFire";
 470         else
 471                 mmu = "unknown";
 472
 473         clockfreq = loops_per_jiffy * HZ * clockfactor;
 474
 475         seq_printf(m, "CPU:\t\t%s\n"
 476                    "MMU:\t\t%s\n"
 477                    "FPU:\t\t%s\n"
 478                    "Clocking:\t%lu.%1luMHz\n"
 479                    "BogoMips:\t%lu.%02lu\n"
 480                    "Calibration:\t%lu loops\n",
 481                    cpu, mmu, fpu,
 482                    clockfreq/1000000,(clockfreq/100000)%10,
 483                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 484                    loops_per_jiffy);
 485         return 0;
 486 }
 487
 488 static void *c_start(struct seq_file *m, loff_t *pos)
 489 {
 490         return *pos < 1 ? (void *)1 : NULL;
 491 }
 492 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 493 {
 494         ++*pos;
 495         return NULL;
 496 }
 497 static void c_stop(struct seq_file *m, void *v)
 498 {
 499 }
 500 const struct seq_operations cpuinfo_op = {
 501         .start  = c_start,
 502         .next   = c_next,
 503         .stop   = c_stop,
 504         .show   = show_cpuinfo,
 505 };
 506
 507 #ifdef CONFIG_PROC_HARDWARE
 508 static int hardware_proc_show(struct seq_file *m, void *v)
 509 {
 510         char model[80];
 511         unsigned long mem;
 512         int i;
 513
 514         if (mach_get_model)
 515                 mach_get_model(model);
 516         else
 517                 strcpy(model, "Unknown m68k");
 518
 519         seq_printf(m, "Model:\t\t%s\n", model);
 520         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 521                 mem += m68k_memory[i].size;
 522         seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
 523
 524         if (mach_get_hardware_list)
 525                 mach_get_hardware_list(m);
 526
 527         return 0;
 528 }
 529
 530 static int hardware_proc_open(struct inode *inode, struct file *file)
 531 {
 532         return single_open(file, hardware_proc_show, NULL);
 533 }
 534
 535 static const struct file_operations hardware_proc_fops = {
 536         .open           = hardware_proc_open,
 537         .read           = seq_read,
 538         .llseek         = seq_lseek,
 539         .release        = single_release,
 540 };
 541
 542 static int __init proc_hardware_init(void)
 543 {
 544         proc_create("hardware", 0, NULL, &hardware_proc_fops);
 545         return 0;
 546 }
 547 module_init(proc_hardware_init);
 548 #endif
 549
 550 void check_bugs(void)
 551 {
 552 #ifndef CONFIG_M68KFPU_EMU
 553         if (m68k_fputype == 0) {
 554                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 555                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 556                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 557                         "emulation project\n");
 558                 panic("no FPU");
 559         }
 560 #endif /* !CONFIG_M68KFPU_EMU */
 561 }
 562
 563 #ifdef CONFIG_ADB
 564 static int __init adb_probe_sync_enable (char *str) {
 565         extern int __adb_probe_sync;
 566         __adb_probe_sync = 1;
 567         return 1;
 568 }
 569
 570 __setup("adb_sync", adb_probe_sync_enable);
 571 #endif /* CONFIG_ADB */