release/src-rt-6.x.4708/linux/linux-2.6.36/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 static char m68k_command_line[CL_SIZE];
  79
  80 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  81 /* machine dependent irq functions */
  82 void (*mach_init_IRQ) (void) __initdata = NULL;
  83 void (*mach_get_model) (char *model);
  84 void (*mach_get_hardware_list) (struct seq_file *m);
  85 /* machine dependent timer functions */
  86 unsigned long (*mach_gettimeoffset) (void);
  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         int i;
 219
 220         /* The bootinfo is located right after the kernel bss */
 221         m68k_parse_bootinfo((const struct bi_record *)_end);
 222
 223         if (CPU_IS_040)
 224                 m68k_is040or060 = 4;
 225         else if (CPU_IS_060)
 226                 m68k_is040or060 = 6;
 227
 228 #ifndef CONFIG_M68KFPU_EMU_ONLY
 229         /* clear the fpu if we have one */
 230         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 231                 volatile int zero = 0;
 232                 asm volatile ("frestore %0" : : "m" (zero));
 233         }
 234 #endif
 235
 236         if (CPU_IS_060) {
 237                 u32 pcr;
 238
 239                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 240                      : "=d" (pcr));
 241                 if (((pcr >> 8) & 0xff) <= 5) {
 242                         printk("Enabling workaround for errata I14\n");
 243                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 244                              : : "d" (pcr | 0x20));
 245                 }
 246         }
 247
 248         init_mm.start_code = PAGE_OFFSET;
 249         init_mm.end_code = (unsigned long)_etext;
 250         init_mm.end_data = (unsigned long)_edata;
 251         init_mm.brk = (unsigned long)_end;
 252
 253         *cmdline_p = m68k_command_line;
 254         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 255
 256         parse_early_param();
 257
 258 #ifdef CONFIG_DUMMY_CONSOLE
 259         conswitchp = &dummy_con;
 260 #endif
 261
 262         switch (m68k_machtype) {
 263 #ifdef CONFIG_AMIGA
 264         case MACH_AMIGA:
 265                 config_amiga();
 266                 break;
 267 #endif
 268 #ifdef CONFIG_ATARI
 269         case MACH_ATARI:
 270                 config_atari();
 271                 break;
 272 #endif
 273 #ifdef CONFIG_MAC
 274         case MACH_MAC:
 275                 config_mac();
 276                 break;
 277 #endif
 278 #ifdef CONFIG_SUN3
 279         case MACH_SUN3:
 280                 config_sun3();
 281                 break;
 282 #endif
 283 #ifdef CONFIG_APOLLO
 284         case MACH_APOLLO:
 285                 config_apollo();
 286                 break;
 287 #endif
 288 #ifdef CONFIG_MVME147
 289         case MACH_MVME147:
 290                 config_mvme147();
 291                 break;
 292 #endif
 293 #ifdef CONFIG_MVME16x
 294         case MACH_MVME16x:
 295                 config_mvme16x();
 296                 break;
 297 #endif
 298 #ifdef CONFIG_BVME6000
 299         case MACH_BVME6000:
 300                 config_bvme6000();
 301                 break;
 302 #endif
 303 #ifdef CONFIG_HP300
 304         case MACH_HP300:
 305                 config_hp300();
 306                 break;
 307 #endif
 308 #ifdef CONFIG_Q40
 309         case MACH_Q40:
 310                 config_q40();
 311                 break;
 312 #endif
 313 #ifdef CONFIG_SUN3X
 314         case MACH_SUN3X:
 315                 config_sun3x();
 316                 break;
 317 #endif
 318         default:
 319                 panic("No configuration setup");
 320         }
 321
 322         paging_init();
 323
 324 #ifndef CONFIG_SUN3
 325         for (i = 1; i < m68k_num_memory; i++)
 326                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 327                                   m68k_memory[i].size);
 328 #ifdef CONFIG_BLK_DEV_INITRD
 329         if (m68k_ramdisk.size) {
 330                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 331                                      m68k_ramdisk.addr, m68k_ramdisk.size,
 332                                      BOOTMEM_DEFAULT);
 333                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 334                 initrd_end = initrd_start + m68k_ramdisk.size;
 335                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 336         }
 337 #endif
 338
 339 #ifdef CONFIG_ATARI
 340         if (MACH_IS_ATARI)
 341                 atari_stram_reserve_pages((void *)availmem);
 342 #endif
 343 #ifdef CONFIG_SUN3X
 344         if (MACH_IS_SUN3X) {
 345                 dvma_init();
 346         }
 347 #endif
 348
 349 #endif /* !CONFIG_SUN3 */
 350
 351 /* set ISA defs early as possible */
 352 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
 353         if (MACH_IS_Q40) {
 354                 isa_type = ISA_TYPE_Q40;
 355                 isa_sex = 0;
 356         }
 357 #ifdef CONFIG_GG2
 358         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
 359                 isa_type = ISA_TYPE_GG2;
 360                 isa_sex = 0;
 361         }
 362 #endif
 363 #ifdef CONFIG_AMIGA_PCMCIA
 364         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 365                 isa_type = ISA_TYPE_AG;
 366                 isa_sex = 1;
 367         }
 368 #endif
 369 #endif
 370 }
 371
 372 static int show_cpuinfo(struct seq_file *m, void *v)
 373 {
 374         const char *cpu, *mmu, *fpu;
 375         unsigned long clockfreq, clockfactor;
 376
 377 #define LOOP_CYCLES_68020       (8)
 378 #define LOOP_CYCLES_68030       (8)
 379 #define LOOP_CYCLES_68040       (3)
 380 #define LOOP_CYCLES_68060       (1)
 381
 382         if (CPU_IS_020) {
 383                 cpu = "68020";
 384                 clockfactor = LOOP_CYCLES_68020;
 385         } else if (CPU_IS_030) {
 386                 cpu = "68030";
 387                 clockfactor = LOOP_CYCLES_68030;
 388         } else if (CPU_IS_040) {
 389                 cpu = "68040";
 390                 clockfactor = LOOP_CYCLES_68040;
 391         } else if (CPU_IS_060) {
 392                 cpu = "68060";
 393                 clockfactor = LOOP_CYCLES_68060;
 394         } else {
 395                 cpu = "680x0";
 396                 clockfactor = 0;
 397         }
 398
 399 #ifdef CONFIG_M68KFPU_EMU_ONLY
 400         fpu = "none(soft float)";
 401 #else
 402         if (m68k_fputype & FPU_68881)
 403                 fpu = "68881";
 404         else if (m68k_fputype & FPU_68882)
 405                 fpu = "68882";
 406         else if (m68k_fputype & FPU_68040)
 407                 fpu = "68040";
 408         else if (m68k_fputype & FPU_68060)
 409                 fpu = "68060";
 410         else if (m68k_fputype & FPU_SUNFPA)
 411                 fpu = "Sun FPA";
 412         else
 413                 fpu = "none";
 414 #endif
 415
 416         if (m68k_mmutype & MMU_68851)
 417                 mmu = "68851";
 418         else if (m68k_mmutype & MMU_68030)
 419                 mmu = "68030";
 420         else if (m68k_mmutype & MMU_68040)
 421                 mmu = "68040";
 422         else if (m68k_mmutype & MMU_68060)
 423                 mmu = "68060";
 424         else if (m68k_mmutype & MMU_SUN3)
 425                 mmu = "Sun-3";
 426         else if (m68k_mmutype & MMU_APOLLO)
 427                 mmu = "Apollo";
 428         else
 429                 mmu = "unknown";
 430
 431         clockfreq = loops_per_jiffy * HZ * clockfactor;
 432
 433         seq_printf(m, "CPU:\t\t%s\n"
 434                    "MMU:\t\t%s\n"
 435                    "FPU:\t\t%s\n"
 436                    "Clocking:\t%lu.%1luMHz\n"
 437                    "BogoMips:\t%lu.%02lu\n"
 438                    "Calibration:\t%lu loops\n",
 439                    cpu, mmu, fpu,
 440                    clockfreq/1000000,(clockfreq/100000)%10,
 441                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 442                    loops_per_jiffy);
 443         return 0;
 444 }
 445
 446 static void *c_start(struct seq_file *m, loff_t *pos)
 447 {
 448         return *pos < 1 ? (void *)1 : NULL;
 449 }
 450 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 451 {
 452         ++*pos;
 453         return NULL;
 454 }
 455 static void c_stop(struct seq_file *m, void *v)
 456 {
 457 }
 458 const struct seq_operations cpuinfo_op = {
 459         .start  = c_start,
 460         .next   = c_next,
 461         .stop   = c_stop,
 462         .show   = show_cpuinfo,
 463 };
 464
 465 #ifdef CONFIG_PROC_HARDWARE
 466 static int hardware_proc_show(struct seq_file *m, void *v)
 467 {
 468         char model[80];
 469         unsigned long mem;
 470         int i;
 471
 472         if (mach_get_model)
 473                 mach_get_model(model);
 474         else
 475                 strcpy(model, "Unknown m68k");
 476
 477         seq_printf(m, "Model:\t\t%s\n", model);
 478         for (mem = 0, i = 0; i < m68k_num_memory; i++)
 479                 mem += m68k_memory[i].size;
 480         seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
 481
 482         if (mach_get_hardware_list)
 483                 mach_get_hardware_list(m);
 484
 485         return 0;
 486 }
 487
 488 static int hardware_proc_open(struct inode *inode, struct file *file)
 489 {
 490         return single_open(file, hardware_proc_show, NULL);
 491 }
 492
 493 static const struct file_operations hardware_proc_fops = {
 494         .open           = hardware_proc_open,
 495         .read           = seq_read,
 496         .llseek         = seq_lseek,
 497         .release        = single_release,
 498 };
 499
 500 static int __init proc_hardware_init(void)
 501 {
 502         proc_create("hardware", 0, NULL, &hardware_proc_fops);
 503         return 0;
 504 }
 505 module_init(proc_hardware_init);
 506 #endif
 507
 508 void check_bugs(void)
 509 {
 510 #ifndef CONFIG_M68KFPU_EMU
 511         if (m68k_fputype == 0) {
 512                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 513                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 514                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 515                         "emulation project\n");
 516                 panic("no FPU");
 517         }
 518 #endif /* !CONFIG_M68KFPU_EMU */
 519 }
 520
 521 #ifdef CONFIG_ADB
 522 static int __init adb_probe_sync_enable (char *str) {
 523         extern int __adb_probe_sync;
 524         __adb_probe_sync = 1;
 525         return 1;
 526 }
 527
 528 __setup("adb_sync", adb_probe_sync_enable);
 529 #endif /* CONFIG_ADB */