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