arch/ppc/kernel/setup.c

   1 /*
   2  * Common prep/pmac/chrp boot and setup code.
   3  */
   4
   5 #include <linux/config.h>
   6 #include <linux/module.h>
   7 #include <linux/string.h>
   8 #include <linux/sched.h>
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <linux/reboot.h>
  12 #include <linux/delay.h>
  13 #include <linux/initrd.h>
  14 #include <linux/ide.h>
  15 #include <linux/tty.h>
  16 #include <linux/bootmem.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/root_dev.h>
  19 #include <linux/cpu.h>
  20 #include <linux/console.h>
  21
  22 #include <asm/residual.h>
  23 #include <asm/io.h>
  24 #include <asm/prom.h>
  25 #include <asm/processor.h>
  26 #include <asm/pgtable.h>
  27 #include <asm/bootinfo.h>
  28 #include <asm/setup.h>
  29 #include <asm/amigappc.h>
  30 #include <asm/smp.h>
  31 #include <asm/elf.h>
  32 #include <asm/cputable.h>
  33 #include <asm/bootx.h>
  34 #include <asm/btext.h>
  35 #include <asm/machdep.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/system.h>
  38 #include <asm/pmac_feature.h>
  39 #include <asm/sections.h>
  40 #include <asm/nvram.h>
  41 #include <asm/xmon.h>
  42 #include <asm/ocp.h>
  43
  44 #if defined(CONFIG_85xx) || defined(CONFIG_83xx)
  45 #include <asm/ppc_sys.h>
  46 #endif
  47
  48 #if defined CONFIG_KGDB
  49 #include <asm/kgdb.h>
  50 #endif
  51
  52 extern void platform_init(unsigned long r3, unsigned long r4,
  53                 unsigned long r5, unsigned long r6, unsigned long r7);
  54 extern void bootx_init(unsigned long r4, unsigned long phys);
  55 extern void identify_cpu(unsigned long offset, unsigned long cpu);
  56 extern void do_cpu_ftr_fixups(unsigned long offset);
  57 extern void reloc_got2(unsigned long offset);
  58
  59 extern void ppc6xx_idle(void);
  60 extern void power4_idle(void);
  61
  62 extern boot_infos_t *boot_infos;
  63 struct ide_machdep_calls ppc_ide_md;
  64 char *sysmap;
  65 unsigned long sysmap_size;
  66
  67 /* Used with the BI_MEMSIZE bootinfo parameter to store the memory
  68    size value reported by the boot loader. */
  69 unsigned long boot_mem_size;
  70
  71 unsigned long ISA_DMA_THRESHOLD;
  72 unsigned long DMA_MODE_READ, DMA_MODE_WRITE;
  73
  74 #ifdef CONFIG_PPC_MULTIPLATFORM
  75 int _machine = 0;
  76
  77 extern void prep_init(unsigned long r3, unsigned long r4,
  78                 unsigned long r5, unsigned long r6, unsigned long r7);
  79 extern void pmac_init(unsigned long r3, unsigned long r4,
  80                 unsigned long r5, unsigned long r6, unsigned long r7);
  81 extern void chrp_init(unsigned long r3, unsigned long r4,
  82                 unsigned long r5, unsigned long r6, unsigned long r7);
  83 #endif /* CONFIG_PPC_MULTIPLATFORM */
  84
  85 #ifdef CONFIG_MAGIC_SYSRQ
  86 unsigned long SYSRQ_KEY = 0x54;
  87 #endif /* CONFIG_MAGIC_SYSRQ */
  88
  89 #ifdef CONFIG_VGA_CONSOLE
  90 unsigned long vgacon_remap_base;
  91 #endif
  92
  93 struct machdep_calls ppc_md;
  94
  95 /*
  96  * These are used in binfmt_elf.c to put aux entries on the stack
  97  * for each elf executable being started.
  98  */
  99 int dcache_bsize;
 100 int icache_bsize;
 101 int ucache_bsize;
 102
 103 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
 104     defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
 105 struct screen_info screen_info = {
 106         0, 25,                  /* orig-x, orig-y */
 107         0,                      /* unused */
 108         0,                      /* orig-video-page */
 109         0,                      /* orig-video-mode */
 110         80,                     /* orig-video-cols */
 111         0,0,0,                  /* ega_ax, ega_bx, ega_cx */
 112         25,                     /* orig-video-lines */
 113         1,                      /* orig-video-isVGA */
 114         16                      /* orig-video-points */
 115 };
 116 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
 117
 118 void machine_restart(char *cmd)
 119 {
 120 #ifdef CONFIG_NVRAM
 121         nvram_sync();
 122 #endif
 123         ppc_md.restart(cmd);
 124 }
 125
 126 EXPORT_SYMBOL(machine_restart);
 127
 128 void machine_power_off(void)
 129 {
 130 #ifdef CONFIG_NVRAM
 131         nvram_sync();
 132 #endif
 133         ppc_md.power_off();
 134 }
 135
 136 EXPORT_SYMBOL(machine_power_off);
 137
 138 void machine_halt(void)
 139 {
 140 #ifdef CONFIG_NVRAM
 141         nvram_sync();
 142 #endif
 143         ppc_md.halt();
 144 }
 145
 146 EXPORT_SYMBOL(machine_halt);
 147
 148 void (*pm_power_off)(void) = machine_power_off;
 149
 150 #ifdef CONFIG_TAU
 151 extern u32 cpu_temp(unsigned long cpu);
 152 extern u32 cpu_temp_both(unsigned long cpu);
 153 #endif /* CONFIG_TAU */
 154
 155 int show_cpuinfo(struct seq_file *m, void *v)
 156 {
 157         int i = (int) v - 1;
 158         int err = 0;
 159         unsigned int pvr;
 160         unsigned short maj, min;
 161         unsigned long lpj;
 162
 163         if (i >= NR_CPUS) {
 164                 /* Show summary information */
 165 #ifdef CONFIG_SMP
 166                 unsigned long bogosum = 0;
 167                 for (i = 0; i < NR_CPUS; ++i)
 168                         if (cpu_online(i))
 169                                 bogosum += cpu_data[i].loops_per_jiffy;
 170                 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
 171                            bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
 172 #endif /* CONFIG_SMP */
 173
 174                 if (ppc_md.show_cpuinfo != NULL)
 175                         err = ppc_md.show_cpuinfo(m);
 176                 return err;
 177         }
 178
 179 #ifdef CONFIG_SMP
 180         if (!cpu_online(i))
 181                 return 0;
 182         pvr = cpu_data[i].pvr;
 183         lpj = cpu_data[i].loops_per_jiffy;
 184 #else
 185         pvr = mfspr(SPRN_PVR);
 186         lpj = loops_per_jiffy;
 187 #endif
 188
 189         seq_printf(m, "processor\t: %d\n", i);
 190         seq_printf(m, "cpu\t\t: ");
 191
 192         if (cur_cpu_spec[i]->pvr_mask)
 193                 seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name);
 194         else
 195                 seq_printf(m, "unknown (%08x)", pvr);
 196 #ifdef CONFIG_ALTIVEC
 197         if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC)
 198                 seq_printf(m, ", altivec supported");
 199 #endif
 200         seq_printf(m, "\n");
 201
 202 #ifdef CONFIG_TAU
 203         if (cur_cpu_spec[i]->cpu_features & CPU_FTR_TAU) {
 204 #ifdef CONFIG_TAU_AVERAGE
 205                 /* more straightforward, but potentially misleading */
 206                 seq_printf(m,  "temperature \t: %u C (uncalibrated)\n",
 207                            cpu_temp(i));
 208 #else
 209                 /* show the actual temp sensor range */
 210                 u32 temp;
 211                 temp = cpu_temp_both(i);
 212                 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
 213                            temp & 0xff, temp >> 16);
 214 #endif
 215         }
 216 #endif /* CONFIG_TAU */
 217
 218         if (ppc_md.show_percpuinfo != NULL) {
 219                 err = ppc_md.show_percpuinfo(m, i);
 220                 if (err)
 221                         return err;
 222         }
 223
 224         switch (PVR_VER(pvr)) {
 225         case 0x0020:    /* 403 family */
 226                 maj = PVR_MAJ(pvr) + 1;
 227                 min = PVR_MIN(pvr);
 228                 break;
 229         case 0x1008:    /* 740P/750P ?? */
 230                 maj = ((pvr >> 8) & 0xFF) - 1;
 231                 min = pvr & 0xFF;
 232                 break;
 233         case 0x8083:    /* e300 */
 234                 maj = PVR_MAJ(pvr);
 235                 min = PVR_MIN(pvr);
 236                 break;
 237         case 0x8020:    /* e500 */
 238                 maj = PVR_MAJ(pvr);
 239                 min = PVR_MIN(pvr);
 240                 break;
 241         default:
 242                 maj = (pvr >> 8) & 0xFF;
 243                 min = pvr & 0xFF;
 244                 break;
 245         }
 246
 247         seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
 248                    maj, min, PVR_VER(pvr), PVR_REV(pvr));
 249
 250         seq_printf(m, "bogomips\t: %lu.%02lu\n",
 251                    lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
 252
 253 #if defined(CONFIG_85xx) || defined(CONFIG_83xx)
 254         if (cur_ppc_sys_spec->ppc_sys_name)
 255                 seq_printf(m, "chipset\t\t: %s\n",
 256                         cur_ppc_sys_spec->ppc_sys_name);
 257 #endif
 258
 259 #ifdef CONFIG_SMP
 260         seq_printf(m, "\n");
 261 #endif
 262
 263         return 0;
 264 }
 265
 266 static void *c_start(struct seq_file *m, loff_t *pos)
 267 {
 268         int i = *pos;
 269
 270         return i <= NR_CPUS? (void *) (i + 1): NULL;
 271 }
 272
 273 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 274 {
 275         ++*pos;
 276         return c_start(m, pos);
 277 }
 278
 279 static void c_stop(struct seq_file *m, void *v)
 280 {
 281 }
 282
 283 struct seq_operations cpuinfo_op = {
 284         .start =c_start,
 285         .next = c_next,
 286         .stop = c_stop,
 287         .show = show_cpuinfo,
 288 };
 289
 290 /*
 291  * We're called here very early in the boot.  We determine the machine
 292  * type and call the appropriate low-level setup functions.
 293  *  -- Cort <cort@fsmlabs.com>
 294  *
 295  * Note that the kernel may be running at an address which is different
 296  * from the address that it was linked at, so we must use RELOC/PTRRELOC
 297  * to access static data (including strings).  -- paulus
 298  */
 299 __init
 300 unsigned long
 301 early_init(int r3, int r4, int r5)
 302 {
 303         unsigned long phys;
 304         unsigned long offset = reloc_offset();
 305
 306         /* Default */
 307         phys = offset + KERNELBASE;
 308
 309         /* First zero the BSS -- use memset, some arches don't have
 310          * caches on yet */
 311         memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
 312
 313         /*
 314          * Identify the CPU type and fix up code sections
 315          * that depend on which cpu we have.
 316          */
 317         identify_cpu(offset, 0);
 318         do_cpu_ftr_fixups(offset);
 319
 320 #if defined(CONFIG_PPC_MULTIPLATFORM)
 321         reloc_got2(offset);
 322
 323         /* If we came here from BootX, clear the screen,
 324          * set up some pointers and return. */
 325         if ((r3 == 0x426f6f58) && (r5 == 0))
 326                 bootx_init(r4, phys);
 327
 328         /*
 329          * don't do anything on prep
 330          * for now, don't use bootinfo because it breaks yaboot 0.5
 331          * and assume that if we didn't find a magic number, we have OF
 332          */
 333         else if (*(unsigned long *)(0) != 0xdeadc0de)
 334                 phys = prom_init(r3, r4, (prom_entry)r5);
 335
 336         reloc_got2(-offset);
 337 #endif
 338
 339         return phys;
 340 }
 341
 342 #ifdef CONFIG_PPC_OF
 343 /*
 344  * Assume here that all clock rates are the same in a
 345  * smp system.  -- Cort
 346  */
 347 int __openfirmware
 348 of_show_percpuinfo(struct seq_file *m, int i)
 349 {
 350         struct device_node *cpu_node;
 351         u32 *fp;
 352         int s;
 353
 354         cpu_node = find_type_devices("cpu");
 355         if (!cpu_node)
 356                 return 0;
 357         for (s = 0; s < i && cpu_node->next; s++)
 358                 cpu_node = cpu_node->next;
 359         fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
 360         if (fp)
 361                 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
 362         return 0;
 363 }
 364
 365 void __init
 366 intuit_machine_type(void)
 367 {
 368         char *model;
 369         struct device_node *root;
 370
 371         /* ask the OF info if we're a chrp or pmac */
 372         root = find_path_device("/");
 373         if (root != 0) {
 374                 /* assume pmac unless proven to be chrp -- Cort */
 375                 _machine = _MACH_Pmac;
 376                 model = get_property(root, "device_type", NULL);
 377                 if (model && !strncmp("chrp", model, 4))
 378                         _machine = _MACH_chrp;
 379                 else {
 380                         model = get_property(root, "model", NULL);
 381                         if (model && !strncmp(model, "IBM", 3))
 382                                 _machine = _MACH_chrp;
 383                 }
 384         }
 385 }
 386 #endif
 387
 388 #ifdef CONFIG_PPC_MULTIPLATFORM
 389 /*
 390  * The PPC_MULTIPLATFORM version of platform_init...
 391  */
 392 void __init
 393 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 394               unsigned long r6, unsigned long r7)
 395 {
 396 #ifdef CONFIG_BOOTX_TEXT
 397         if (boot_text_mapped) {
 398                 btext_clearscreen();
 399                 btext_welcome();
 400         }
 401 #endif
 402
 403         parse_bootinfo(find_bootinfo());
 404
 405         /* if we didn't get any bootinfo telling us what we are... */
 406         if (_machine == 0) {
 407                 /* prep boot loader tells us if we're prep or not */
 408                 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
 409                         _machine = _MACH_prep;
 410         }
 411
 412         /* not much more to do here, if prep */
 413         if (_machine == _MACH_prep) {
 414                 prep_init(r3, r4, r5, r6, r7);
 415                 return;
 416         }
 417
 418         /* prom_init has already been called from __start */
 419         if (boot_infos)
 420                 relocate_nodes();
 421
 422         /* If we aren't PReP, we can find out if we're Pmac
 423          * or CHRP with this. */
 424         if (_machine == 0)
 425                 intuit_machine_type();
 426
 427         /* finish_device_tree may need _machine defined. */
 428         finish_device_tree();
 429
 430         /*
 431          * If we were booted via quik, r3 points to the physical
 432          * address of the command-line parameters.
 433          * If we were booted from an xcoff image (i.e. netbooted or
 434          * booted from floppy), we get the command line from the
 435          * bootargs property of the /chosen node.
 436          * If an initial ramdisk is present, r3 and r4
 437          * are used for initrd_start and initrd_size,
 438          * otherwise they contain 0xdeadbeef.
 439          */
 440         if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
 441                 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
 442                         sizeof(cmd_line));
 443         } else if (boot_infos != 0) {
 444                 /* booted by BootX - check for ramdisk */
 445                 if (boot_infos->kernelParamsOffset != 0)
 446                         strlcpy(cmd_line, (char *) boot_infos
 447                                 + boot_infos->kernelParamsOffset,
 448                                 sizeof(cmd_line));
 449 #ifdef CONFIG_BLK_DEV_INITRD
 450                 if (boot_infos->ramDisk) {
 451                         initrd_start = (unsigned long) boot_infos
 452                                 + boot_infos->ramDisk;
 453                         initrd_end = initrd_start + boot_infos->ramDiskSize;
 454                         initrd_below_start_ok = 1;
 455                 }
 456 #endif
 457         } else {
 458                 struct device_node *chosen;
 459                 char *p;
 460
 461 #ifdef CONFIG_BLK_DEV_INITRD
 462                 if (r3 && r4 && r4 != 0xdeadbeef) {
 463                         if (r3 < KERNELBASE)
 464                                 r3 += KERNELBASE;
 465                         initrd_start = r3;
 466                         initrd_end = r3 + r4;
 467                         ROOT_DEV = Root_RAM0;
 468                         initrd_below_start_ok = 1;
 469                 }
 470 #endif
 471                 chosen = find_devices("chosen");
 472                 if (chosen != NULL) {
 473                         p = get_property(chosen, "bootargs", NULL);
 474                         if (p && *p) {
 475                                 strlcpy(cmd_line, p, sizeof(cmd_line));
 476                         }
 477                 }
 478         }
 479 #ifdef CONFIG_ADB
 480         if (strstr(cmd_line, "adb_sync")) {
 481                 extern int __adb_probe_sync;
 482                 __adb_probe_sync = 1;
 483         }
 484 #endif /* CONFIG_ADB */
 485
 486         switch (_machine) {
 487         case _MACH_Pmac:
 488                 pmac_init(r3, r4, r5, r6, r7);
 489                 break;
 490         case _MACH_chrp:
 491                 chrp_init(r3, r4, r5, r6, r7);
 492                 break;
 493         }
 494 }
 495
 496 #ifdef CONFIG_SERIAL_CORE_CONSOLE
 497 extern char *of_stdout_device;
 498
 499 static int __init set_preferred_console(void)
 500 {
 501         struct device_node *prom_stdout;
 502         char *name;
 503         int offset;
 504
 505         if (of_stdout_device == NULL)
 506                 return -ENODEV;
 507
 508         /* The user has requested a console so this is already set up. */
 509         if (strstr(saved_command_line, "console="))
 510                 return -EBUSY;
 511
 512         prom_stdout = find_path_device(of_stdout_device);
 513         if (!prom_stdout)
 514                 return -ENODEV;
 515
 516         name = (char *)get_property(prom_stdout, "name", NULL);
 517         if (!name)
 518                 return -ENODEV;
 519
 520         if (strcmp(name, "serial") == 0) {
 521                 int i;
 522                 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
 523                 if (i > 8) {
 524                         switch (reg[1]) {
 525                                 case 0x3f8:
 526                                         offset = 0;
 527                                         break;
 528                                 case 0x2f8:
 529                                         offset = 1;
 530                                         break;
 531                                 case 0x898:
 532                                         offset = 2;
 533                                         break;
 534                                 case 0x890:
 535                                         offset = 3;
 536                                         break;
 537                                 default:
 538                                         /* We dont recognise the serial port */
 539                                         return -ENODEV;
 540                         }
 541                 }
 542         } else if (strcmp(name, "ch-a") == 0)
 543                 offset = 0;
 544         else if (strcmp(name, "ch-b") == 0)
 545                 offset = 1;
 546         else
 547                 return -ENODEV;
 548         return add_preferred_console("ttyS", offset, NULL);
 549 }
 550 console_initcall(set_preferred_console);
 551 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
 552 #endif /* CONFIG_PPC_MULTIPLATFORM */
 553
 554 struct bi_record *find_bootinfo(void)
 555 {
 556         struct bi_record *rec;
 557
 558         rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
 559         if ( rec->tag != BI_FIRST ) {
 560                 /*
 561                  * This 0x10000 offset is a terrible hack but it will go away when
 562                  * we have the bootloader handle all the relocation and
 563                  * prom calls -- Cort
 564                  */
 565                 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
 566                 if ( rec->tag != BI_FIRST )
 567                         return NULL;
 568         }
 569         return rec;
 570 }
 571
 572 void parse_bootinfo(struct bi_record *rec)
 573 {
 574         if (rec == NULL || rec->tag != BI_FIRST)
 575                 return;
 576         while (rec->tag != BI_LAST) {
 577                 ulong *data = rec->data;
 578                 switch (rec->tag) {
 579                 case BI_CMD_LINE:
 580                         strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
 581                         break;
 582                 case BI_SYSMAP:
 583                         sysmap = (char *)((data[0] >= (KERNELBASE)) ? data[0] :
 584                                           (data[0]+KERNELBASE));
 585                         sysmap_size = data[1];
 586                         break;
 587 #ifdef CONFIG_BLK_DEV_INITRD
 588                 case BI_INITRD:
 589                         initrd_start = data[0] + KERNELBASE;
 590                         initrd_end = data[0] + data[1] + KERNELBASE;
 591                         break;
 592 #endif /* CONFIG_BLK_DEV_INITRD */
 593 #ifdef CONFIG_PPC_MULTIPLATFORM
 594                 case BI_MACHTYPE:
 595                         _machine = data[0];
 596                         break;
 597 #endif
 598                 case BI_MEMSIZE:
 599                         boot_mem_size = data[0];
 600                         break;
 601                 }
 602                 rec = (struct bi_record *)((ulong)rec + rec->size);
 603         }
 604 }
 605
 606 /*
 607  * Find out what kind of machine we're on and save any data we need
 608  * from the early boot process (devtree is copied on pmac by prom_init()).
 609  * This is called very early on the boot process, after a minimal
 610  * MMU environment has been set up but before MMU_init is called.
 611  */
 612 void __init
 613 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
 614              unsigned long r6, unsigned long r7)
 615 {
 616 #ifdef CONFIG_CMDLINE
 617         strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
 618 #endif /* CONFIG_CMDLINE */
 619
 620 #ifdef CONFIG_6xx
 621         ppc_md.power_save = ppc6xx_idle;
 622 #endif
 623 #ifdef CONFIG_POWER4
 624         ppc_md.power_save = power4_idle;
 625 #endif
 626
 627         platform_init(r3, r4, r5, r6, r7);
 628
 629         if (ppc_md.progress)
 630                 ppc_md.progress("id mach(): done", 0x200);
 631 }
 632
 633 /* Checks "l2cr=xxxx" command-line option */
 634 int __init ppc_setup_l2cr(char *str)
 635 {
 636         if (cpu_has_feature(CPU_FTR_L2CR)) {
 637                 unsigned long val = simple_strtoul(str, NULL, 0);
 638                 printk(KERN_INFO "l2cr set to %lx\n", val);
 639                 _set_L2CR(0);           /* force invalidate by disable cache */
 640                 _set_L2CR(val);         /* and enable it */
 641         }
 642         return 1;
 643 }
 644 __setup("l2cr=", ppc_setup_l2cr);
 645
 646 #ifdef CONFIG_GENERIC_NVRAM
 647
 648 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
 649 unsigned char nvram_read_byte(int addr)
 650 {
 651         if (ppc_md.nvram_read_val)
 652                 return ppc_md.nvram_read_val(addr);
 653         return 0xff;
 654 }
 655 EXPORT_SYMBOL(nvram_read_byte);
 656
 657 void nvram_write_byte(unsigned char val, int addr)
 658 {
 659         if (ppc_md.nvram_write_val)
 660                 ppc_md.nvram_write_val(addr, val);
 661 }
 662 EXPORT_SYMBOL(nvram_write_byte);
 663
 664 void nvram_sync(void)
 665 {
 666         if (ppc_md.nvram_sync)
 667                 ppc_md.nvram_sync();
 668 }
 669 EXPORT_SYMBOL(nvram_sync);
 670
 671 #endif /* CONFIG_NVRAM */
 672
 673 static struct cpu cpu_devices[NR_CPUS];
 674
 675 int __init ppc_init(void)
 676 {
 677         int i;
 678
 679         /* clear the progress line */
 680         if ( ppc_md.progress ) ppc_md.progress("             ", 0xffff);
 681
 682         /* register CPU devices */
 683         for (i = 0; i < NR_CPUS; i++)
 684                 if (cpu_possible(i))
 685                         register_cpu(&cpu_devices[i], i, NULL);
 686
 687         /* call platform init */
 688         if (ppc_md.init != NULL) {
 689                 ppc_md.init();
 690         }
 691         return 0;
 692 }
 693
 694 arch_initcall(ppc_init);
 695
 696 /* Warning, IO base is not yet inited */
 697 void __init setup_arch(char **cmdline_p)
 698 {
 699         extern char *klimit;
 700         extern void do_init_bootmem(void);
 701
 702         /* so udelay does something sensible, assume <= 1000 bogomips */
 703         loops_per_jiffy = 500000000 / HZ;
 704
 705 #ifdef CONFIG_PPC_MULTIPLATFORM
 706         /* This could be called "early setup arch", it must be done
 707          * now because xmon need it
 708          */
 709         if (_machine == _MACH_Pmac)
 710                 pmac_feature_init();    /* New cool way */
 711 #endif
 712
 713 #ifdef CONFIG_XMON
 714         xmon_map_scc();
 715         if (strstr(cmd_line, "xmon"))
 716                 xmon(NULL);
 717 #endif /* CONFIG_XMON */
 718         if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
 719
 720 #if defined(CONFIG_KGDB)
 721         if (ppc_md.kgdb_map_scc)
 722                 ppc_md.kgdb_map_scc();
 723         set_debug_traps();
 724         if (strstr(cmd_line, "gdb")) {
 725                 if (ppc_md.progress)
 726                         ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
 727                 printk("kgdb breakpoint activated\n");
 728                 breakpoint();
 729         }
 730 #endif
 731
 732         /*
 733          * Set cache line size based on type of cpu as a default.
 734          * Systems with OF can look in the properties on the cpu node(s)
 735          * for a possibly more accurate value.
 736          */
 737         if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
 738                 dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
 739                 icache_bsize = cur_cpu_spec[0]->icache_bsize;
 740                 ucache_bsize = 0;
 741         } else
 742                 ucache_bsize = dcache_bsize = icache_bsize
 743                         = cur_cpu_spec[0]->dcache_bsize;
 744
 745         /* reboot on panic */
 746         panic_timeout = 180;
 747
 748         init_mm.start_code = PAGE_OFFSET;
 749         init_mm.end_code = (unsigned long) _etext;
 750         init_mm.end_data = (unsigned long) _edata;
 751         init_mm.brk = (unsigned long) klimit;
 752
 753         /* Save unparsed command line copy for /proc/cmdline */
 754         strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
 755         *cmdline_p = cmd_line;
 756
 757         /* set up the bootmem stuff with available memory */
 758         do_init_bootmem();
 759         if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
 760
 761 #ifdef CONFIG_PPC_OCP
 762         /* Initialize OCP device list */
 763         ocp_early_init();
 764         if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
 765 #endif
 766
 767 #ifdef CONFIG_DUMMY_CONSOLE
 768         conswitchp = &dummy_con;
 769 #endif
 770
 771         ppc_md.setup_arch();
 772         if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
 773
 774         paging_init();
 775
 776         /* this is for modules since _machine can be a define -- Cort */
 777         ppc_md.ppc_machine = _machine;
 778 }