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                         m68k_ramdisk.addr = data[0];
 177                         m68k_ramdisk.size = data[1];
 178                         break;
 179
 180                 case BI_COMMAND_LINE:
 181 //if U-boot then ignore
 182 #ifndef CONFIG_UBOOT
 183                         strlcpy(m68k_command_line, (const char *)data,
 184                                 sizeof(m68k_command_line));
 185 #endif
 186                         break;
 187
 188                 default:
 189                         if (MACH_IS_AMIGA)
 190                                 unknown = amiga_parse_bootinfo(record);
 191                         else if (MACH_IS_ATARI)
 192                                 unknown = atari_parse_bootinfo(record);
 193                         else if (MACH_IS_MAC)
 194                                 unknown = mac_parse_bootinfo(record);
 195                         else if (MACH_IS_Q40)
 196                                 unknown = q40_parse_bootinfo(record);
 197                         else if (MACH_IS_BVME6000)
 198                                 unknown = bvme6000_parse_bootinfo(record);
 199                         else if (MACH_IS_MVME16x)
 200                                 unknown = mvme16x_parse_bootinfo(record);
 201                         else if (MACH_IS_MVME147)
 202                                 unknown = mvme147_parse_bootinfo(record);
 203                         else if (MACH_IS_HP300)
 204                                 unknown = hp300_parse_bootinfo(record);
 205                         else if (MACH_IS_APOLLO)
 206                                 unknown = apollo_parse_bootinfo(record);
 207                         else if (MACH_IS_COLDFIRE)
 208                                 unknown = coldfire_parse_bootinfo(record);
 209                         else if
 210                                 unknown = 1;
 211                 }
 212                 if (unknown)
 213                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 214                                record->tag);
 215                 record = (struct bi_record *)((unsigned long)record +
 216                                               record->size);
 217         }
 218
 219 #ifdef CONFIG_COLDFIRE
 220         if (MACH_IS_COLDFIRE)
 221     coldfire_sort_memrec();
 222 #endif
 223
 224         m68k_realnum_memory = m68k_num_memory;
 225 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
 226         if (m68k_num_memory > 1) {
 227                 printk("Ignoring last %i chunks of physical memory\n",
 228                        (m68k_num_memory - 1));
 229                 m68k_num_memory = 1;
 230         }
 231 #endif
 232 }
 233
 234 void __init setup_arch(char **cmdline_p)
 235 {
 236         int i;
 237
 238         /* The bootinfo is located right after the kernel bss */
 239         m68k_parse_bootinfo((const struct bi_record *)_end);
 240
 241         if (CPU_IS_040)
 242                 m68k_is040or060 = 4;
 243         else if (CPU_IS_060)
 244                 m68k_is040or060 = 6;
 245
 246         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 247          * be confused by software FPU emulation. BEWARE.
 248          * We should really do our own FPU check at startup.
 249          * [what do we do with buggy 68LC040s? if we have problems
 250          *  with them, we should add a test to check_bugs() below] */
 251 #ifndef CONFIG_M68KFPU_EMU_ONLY
 252         /* clear the fpu if we have one */
 253         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 254                 volatile int zero = 0;
 255                 asm volatile ("frestore %0" : : "m" (zero));
 256         }
 257 #endif
 258
 259         if (CPU_IS_060) {
 260                 u32 pcr;
 261
 262                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 263                      : "=d" (pcr));
 264                 if (((pcr >> 8) & 0xff) <= 5) {
 265                         printk("Enabling workaround for errata I14\n");
 266                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 267                              : : "d" (pcr | 0x20));
 268                 }
 269         }
 270
 271         init_mm.start_code = PAGE_OFFSET;
 272         init_mm.end_code = (unsigned long)_etext;
 273         init_mm.end_data = (unsigned long)_edata;
 274         init_mm.brk = (unsigned long)_end;
 275
 276         *cmdline_p = m68k_command_line;
 277         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 278
 279         parse_early_param();
 280
 281 #ifdef CONFIG_DUMMY_CONSOLE
 282         conswitchp = &dummy_con;
 283 #endif
 284
 285         switch (m68k_machtype) {
 286 #ifdef CONFIG_AMIGA
 287         case MACH_AMIGA:
 288                 config_amiga();
 289                 break;
 290 #endif
 291 #ifdef CONFIG_ATARI
 292         case MACH_ATARI:
 293                 config_atari();
 294                 break;
 295 #endif
 296 #ifdef CONFIG_MAC
 297         case MACH_MAC:
 298                 config_mac();
 299                 break;
 300 #endif
 301 #ifdef CONFIG_SUN3
 302         case MACH_SUN3:
 303                 config_sun3();
 304                 break;
 305 #endif
 306 #ifdef CONFIG_APOLLO
 307         case MACH_APOLLO:
 308                 config_apollo();
 309                 break;
 310 #endif
 311 #ifdef CONFIG_MVME147
 312         case MACH_MVME147:
 313                 config_mvme147();
 314                 break;
 315 #endif
 316 #ifdef CONFIG_MVME16x
 317         case MACH_MVME16x:
 318                 config_mvme16x();
 319                 break;
 320 #endif
 321 #ifdef CONFIG_BVME6000
 322         case MACH_BVME6000:
 323                 config_bvme6000();
 324                 break;
 325 #endif
 326 #ifdef CONFIG_HP300
 327         case MACH_HP300:
 328                 config_hp300();
 329                 break;
 330 #endif
 331 #ifdef CONFIG_Q40
 332         case MACH_Q40:
 333                 config_q40();
 334                 break;
 335 #endif
 336 #ifdef CONFIG_SUN3X
 337         case MACH_SUN3X:
 338                 config_sun3x();
 339                 break;
 340 #endif
 341 #ifdef CONFIG_COLDFIRE
 342         case MACH_COLDFIRE:
 343                 config_coldfire();
 344                 break;
 345 #endif
 346         default:
 347                 panic("No configuration setup");
 348         }
 349
 350         paging_init();
 351
 352 #ifndef CONFIG_SUN3
 353         for (i = 1; i < m68k_num_memory; i++)
 354                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 355                                   m68k_memory[i].size);
 356 #ifdef CONFIG_BLK_DEV_INITRD
 357         if (m68k_ramdisk.size) {
 358                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 359                                      m68k_ramdisk.addr, m68k_ramdisk.size,
 360                                      BOOTMEM_DEFAULT);
 361                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 362                 initrd_end = initrd_start + m68k_ramdisk.size;
 363                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 364         }
 365 #endif
 366
 367 #ifdef CONFIG_ATARI
 368         if (MACH_IS_ATARI)
 369                 atari_stram_reserve_pages((void *)availmem);
 370 #endif
 371 #ifdef CONFIG_SUN3X
 372         if (MACH_IS_SUN3X) {
 373                 dvma_init();
 374         }
 375 #endif
 376
 377 #endif /* !CONFIG_SUN3 */
 378
 379 #ifdef CONFIG_COLDFIRE
 380         if (MACH_IS_COLDFIRE)
 381                 mmu_context_init();
 382 #endif
 383
 384 /* set ISA defs early as possible */
 385 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 386         if (MACH_IS_Q40) {
 387                 isa_type = ISA_TYPE_Q40;
 388                 isa_sex = 0;
 389         }
 390 #ifdef CONFIG_AMIGA_PCMCIA
 391         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 392                 isa_type = ISA_TYPE_AG;
 393                 isa_sex = 1;
 394         }
 395 #endif
 396 #endif
 397 }
 398
 399 static int show_cpuinfo(struct seq_file *m, void *v)
 400 {
 401         const char *cpu, *mmu, *fpu;
 402         unsigned long clockfreq, clockfactor;
 403
 404 #define LOOP_CYCLES_68020       (8)
 405 #define LOOP_CYCLES_68030       (8)
 406 #define LOOP_CYCLES_68040       (3)
 407 #define LOOP_CYCLES_68060       (1)
 408
 409         if (CPU_IS_020) {
 410                 cpu = "68020";
 411                 clockfactor = LOOP_CYCLES_68020;
 412         } else if (CPU_IS_030) {
 413                 cpu = "68030";
 414                 clockfactor = LOOP_CYCLES_68030;
 415         } else if (CPU_IS_040) {
 416                 cpu = "68040";
 417                 clockfactor = LOOP_CYCLES_68040;
 418         } else if (CPU_IS_060) {
 419                 cpu = "68060";
 420                 clockfactor = LOOP_CYCLES_68060;
 421         } else if (CPU_IS_CFV4E) {
 422                 cpu = "ColdFire V4e";
 423                 clockfactor = LOOP_CYCLES_COLDFIRE;
 424         } else {
 425                 cpu = "680x0";
 426                 clockfactor = 0;
 427         }
 428
 429 #ifdef CONFIG_M68KFPU_EMU_ONLY
 430         fpu = "none(soft float)";
 431 #else
 432         if (m68k_fputype & FPU_68881)
 433                 fpu = "68881";
 434         else if (m68k_fputype & FPU_68882)
 435                 fpu = "68882";
 436         else if (m68k_fputype & FPU_68040)
 437                 fpu = "68040";
 438         else if (m68k_fputype & FPU_68060)
 439                 fpu = "68060";
 440         else if (m68k_fputype & FPU_SUNFPA)
 441                 fpu = "Sun FPA";
 442         else if (m68k_fputype & FPU_CFV4E)
 443                 fpu = "ColdFire V4e";
 444         else
 445                 fpu = "none";
 446 #endif
 447
 448         if (m68k_mmutype & MMU_68851)
 449                 mmu = "68851";
 450         else if (m68k_mmutype & MMU_68030)
 451                 mmu = "68030";
 452         else if (m68k_mmutype & MMU_68040)
 453                 mmu = "68040";
 454         else if (m68k_mmutype & MMU_68060)
 455                 mmu = "68060";
 456         else if (m68k_mmutype & MMU_SUN3)
 457                 mmu = "Sun-3";
 458         else if (m68k_mmutype & MMU_APOLLO)
 459                 mmu = "Apollo";
 460         else if (m68k_mmutype & MMU_CFV4E)
 461                 mmu = "ColdFire";
 462         else
 463                 mmu = "unknown";
 464
 465         clockfreq = loops_per_jiffy * HZ * clockfactor;
 466
 467         seq_printf(m, "CPU:\t\t%s\n"
 468                    "MMU:\t\t%s\n"
 469                    "FPU:\t\t%s\n"
 470                    "Clocking:\t%lu.%1luMHz\n"
 471                    "BogoMips:\t%lu.%02lu\n"
 472                    "Calibration:\t%lu loops\n",
 473                    cpu, mmu, fpu,
 474                    clockfreq/1000000,(clockfreq/100000)%10,
 475                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 476                    loops_per_jiffy);
 477         return 0;
 478 }
 479
 480 static void *c_start(struct seq_file *m, loff_t *pos)
 481 {
 482         return *pos < 1 ? (void *)1 : NULL;
 483 }
 484 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 485 {
 486         ++*pos;
 487         return NULL;
 488 }
 489 static void c_stop(struct seq_file *m, void *v)
 490 {
 491 }
 492 const struct seq_operations cpuinfo_op = {
 493         .start  = c_start,
 494         .next   = c_next,
 495         .stop   = c_stop,
 496         .show   = show_cpuinfo,
 497 };
 498
 499 #ifdef CONFIG_PROC_HARDWARE
 500 static int hardware_proc_show(struct seq_file *m, void *v)
 501 {
 502         char model[80];
 503         unsigned long mem;
 504         int i;
 505
 506         if (mach_get_model)
 507                 mach_get_model(model);
 508         else
 509                 strcpy(model, "Unknown m68k");
 510
 511         seq_printf(m, "Model:\t\t%s\n", model);
 512         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 513                 mem += m68k_memory[i].size;
 514         seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
 515
 516         if (mach_get_hardware_list)
 517                 mach_get_hardware_list(m);
 518
 519         return 0;
 520 }
 521
 522 static int hardware_proc_open(struct inode *inode, struct file *file)
 523 {
 524         return single_open(file, hardware_proc_show, NULL);
 525 }
 526
 527 static const struct file_operations hardware_proc_fops = {
 528         .open           = hardware_proc_open,
 529         .read           = seq_read,
 530         .llseek         = seq_lseek,
 531         .release        = single_release,
 532 };
 533
 534 static int __init proc_hardware_init(void)
 535 {
 536         proc_create("hardware", 0, NULL, &hardware_proc_fops);
 537         return 0;
 538 }
 539 module_init(proc_hardware_init);
 540 #endif
 541
 542 void check_bugs(void)
 543 {
 544 #ifndef CONFIG_M68KFPU_EMU
 545         if (m68k_fputype == 0) {
 546                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 547                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 548                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 549                         "emulation project\n");
 550                 panic("no FPU");
 551         }
 552 #endif /* !CONFIG_M68KFPU_EMU */
 553 }
 554
 555 #ifdef CONFIG_ADB
 556 static int __init adb_probe_sync_enable (char *str) {
 557         extern int __adb_probe_sync;
 558         __adb_probe_sync = 1;
 559         return 1;
 560 }
 561
 562 __setup("adb_sync", adb_probe_sync_enable);
 563 #endif /* CONFIG_ADB */