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         /* If we are a Freescale core do a simple check so
 225          * we dont have to keep adding cases in the future */
 226         if ((PVR_VER(pvr) & 0x8000) == 0x8000) {
 227                 maj = PVR_MAJ(pvr);
 228                 min = PVR_MIN(pvr);
 229         } else {
 230                 switch (PVR_VER(pvr)) {
 231                         case 0x0020:    /* 403 family */
 232                                 maj = PVR_MAJ(pvr) + 1;
 233                                 min = PVR_MIN(pvr);
 234                                 break;
 235                         case 0x1008:    /* 740P/750P ?? */
 236                                 maj = ((pvr >> 8) & 0xFF) - 1;
 237                                 min = pvr & 0xFF;
 238                                 break;
 239                         default:
 240                                 maj = (pvr >> 8) & 0xFF;
 241                                 min = pvr & 0xFF;
 242                                 break;
 243                 }
 244         }
 245
 246         seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
 247                    maj, min, PVR_VER(pvr), PVR_REV(pvr));
 248
 249         seq_printf(m, "bogomips\t: %lu.%02lu\n",
 250                    lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
 251
 252 #if defined(CONFIG_85xx) || defined(CONFIG_83xx)
 253         if (cur_ppc_sys_spec->ppc_sys_name)
 254                 seq_printf(m, "chipset\t\t: %s\n",
 255                         cur_ppc_sys_spec->ppc_sys_name);
 256 #endif
 257
 258 #ifdef CONFIG_SMP
 259         seq_printf(m, "\n");
 260 #endif
 261
 262         return 0;
 263 }
 264
 265 static void *c_start(struct seq_file *m, loff_t *pos)
 266 {
 267         int i = *pos;
 268
 269         return i <= NR_CPUS? (void *) (i + 1): NULL;
 270 }
 271
 272 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 273 {
 274         ++*pos;
 275         return c_start(m, pos);
 276 }
 277
 278 static void c_stop(struct seq_file *m, void *v)
 279 {
 280 }
 281
 282 struct seq_operations cpuinfo_op = {
 283         .start =c_start,
 284         .next = c_next,
 285         .stop = c_stop,
 286         .show = show_cpuinfo,
 287 };
 288
 289 /*
 290  * We're called here very early in the boot.  We determine the machine
 291  * type and call the appropriate low-level setup functions.
 292  *  -- Cort <cort@fsmlabs.com>
 293  *
 294  * Note that the kernel may be running at an address which is different
 295  * from the address that it was linked at, so we must use RELOC/PTRRELOC
 296  * to access static data (including strings).  -- paulus
 297  */
 298 __init
 299 unsigned long
 300 early_init(int r3, int r4, int r5)
 301 {
 302         unsigned long phys;
 303         unsigned long offset = reloc_offset();
 304
 305         /* Default */
 306         phys = offset + KERNELBASE;
 307
 308         /* First zero the BSS -- use memset, some arches don't have
 309          * caches on yet */
 310         memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
 311
 312         /*
 313          * Identify the CPU type and fix up code sections
 314          * that depend on which cpu we have.
 315          */
 316         identify_cpu(offset, 0);
 317         do_cpu_ftr_fixups(offset);
 318
 319 #if defined(CONFIG_PPC_MULTIPLATFORM)
 320         reloc_got2(offset);
 321
 322         /* If we came here from BootX, clear the screen,
 323          * set up some pointers and return. */
 324         if ((r3 == 0x426f6f58) && (r5 == 0))
 325                 bootx_init(r4, phys);
 326
 327         /*
 328          * don't do anything on prep
 329          * for now, don't use bootinfo because it breaks yaboot 0.5
 330          * and assume that if we didn't find a magic number, we have OF
 331          */
 332         else if (*(unsigned long *)(0) != 0xdeadc0de)
 333                 phys = prom_init(r3, r4, (prom_entry)r5);
 334
 335         reloc_got2(-offset);
 336 #endif
 337
 338         return phys;
 339 }
 340
 341 #ifdef CONFIG_PPC_OF
 342 /*
 343  * Assume here that all clock rates are the same in a
 344  * smp system.  -- Cort
 345  */
 346 int __openfirmware
 347 of_show_percpuinfo(struct seq_file *m, int i)
 348 {
 349         struct device_node *cpu_node;
 350         u32 *fp;
 351         int s;
 352
 353         cpu_node = find_type_devices("cpu");
 354         if (!cpu_node)
 355                 return 0;
 356         for (s = 0; s < i && cpu_node->next; s++)
 357                 cpu_node = cpu_node->next;
 358         fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
 359         if (fp)
 360                 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
 361         return 0;
 362 }
 363
 364 void __init
 365 intuit_machine_type(void)
 366 {
 367         char *model;
 368         struct device_node *root;
 369
 370         /* ask the OF info if we're a chrp or pmac */
 371         root = find_path_device("/");
 372         if (root != 0) {
 373                 /* assume pmac unless proven to be chrp -- Cort */
 374                 _machine = _MACH_Pmac;
 375                 model = get_property(root, "device_type", NULL);
 376                 if (model && !strncmp("chrp", model, 4))
 377                         _machine = _MACH_chrp;
 378                 else {
 379                         model = get_property(root, "model", NULL);
 380                         if (model && !strncmp(model, "IBM", 3))
 381                                 _machine = _MACH_chrp;
 382                 }
 383         }
 384 }
 385 #endif
 386
 387 #ifdef CONFIG_PPC_MULTIPLATFORM
 388 /*
 389  * The PPC_MULTIPLATFORM version of platform_init...
 390  */
 391 void __init
 392 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 393               unsigned long r6, unsigned long r7)
 394 {
 395 #ifdef CONFIG_BOOTX_TEXT
 396         if (boot_text_mapped) {
 397                 btext_clearscreen();
 398                 btext_welcome();
 399         }
 400 #endif
 401
 402         parse_bootinfo(find_bootinfo());
 403
 404         /* if we didn't get any bootinfo telling us what we are... */
 405         if (_machine == 0) {
 406                 /* prep boot loader tells us if we're prep or not */
 407                 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
 408                         _machine = _MACH_prep;
 409         }
 410
 411         /* not much more to do here, if prep */
 412         if (_machine == _MACH_prep) {
 413                 prep_init(r3, r4, r5, r6, r7);
 414                 return;
 415         }
 416
 417         /* prom_init has already been called from __start */
 418         if (boot_infos)
 419                 relocate_nodes();
 420
 421         /* If we aren't PReP, we can find out if we're Pmac
 422          * or CHRP with this. */
 423         if (_machine == 0)
 424                 intuit_machine_type();
 425
 426         /* finish_device_tree may need _machine defined. */
 427         finish_device_tree();
 428
 429         /*
 430          * If we were booted via quik, r3 points to the physical
 431          * address of the command-line parameters.
 432          * If we were booted from an xcoff image (i.e. netbooted or
 433          * booted from floppy), we get the command line from the
 434          * bootargs property of the /chosen node.
 435          * If an initial ramdisk is present, r3 and r4
 436          * are used for initrd_start and initrd_size,
 437          * otherwise they contain 0xdeadbeef.
 438          */
 439         if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
 440                 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
 441                         sizeof(cmd_line));
 442         } else if (boot_infos != 0) {
 443                 /* booted by BootX - check for ramdisk */
 444                 if (boot_infos->kernelParamsOffset != 0)
 445                         strlcpy(cmd_line, (char *) boot_infos
 446                                 + boot_infos->kernelParamsOffset,
 447                                 sizeof(cmd_line));
 448 #ifdef CONFIG_BLK_DEV_INITRD
 449                 if (boot_infos->ramDisk) {
 450                         initrd_start = (unsigned long) boot_infos
 451                                 + boot_infos->ramDisk;
 452                         initrd_end = initrd_start + boot_infos->ramDiskSize;
 453                         initrd_below_start_ok = 1;
 454                 }
 455 #endif
 456         } else {
 457                 struct device_node *chosen;
 458                 char *p;
 459
 460 #ifdef CONFIG_BLK_DEV_INITRD
 461                 if (r3 && r4 && r4 != 0xdeadbeef) {
 462                         if (r3 < KERNELBASE)
 463                                 r3 += KERNELBASE;
 464                         initrd_start = r3;
 465                         initrd_end = r3 + r4;
 466                         ROOT_DEV = Root_RAM0;
 467                         initrd_below_start_ok = 1;
 468                 }
 469 #endif
 470                 chosen = find_devices("chosen");
 471                 if (chosen != NULL) {
 472                         p = get_property(chosen, "bootargs", NULL);
 473                         if (p && *p) {
 474                                 strlcpy(cmd_line, p, sizeof(cmd_line));
 475                         }
 476                 }
 477         }
 478 #ifdef CONFIG_ADB
 479         if (strstr(cmd_line, "adb_sync")) {
 480                 extern int __adb_probe_sync;
 481                 __adb_probe_sync = 1;
 482         }
 483 #endif /* CONFIG_ADB */
 484
 485         switch (_machine) {
 486         case _MACH_Pmac:
 487                 pmac_init(r3, r4, r5, r6, r7);
 488                 break;
 489         case _MACH_chrp:
 490                 chrp_init(r3, r4, r5, r6, r7);
 491                 break;
 492         }
 493 }
 494
 495 #ifdef CONFIG_SERIAL_CORE_CONSOLE
 496 extern char *of_stdout_device;
 497
 498 static int __init set_preferred_console(void)
 499 {
 500         struct device_node *prom_stdout;
 501         char *name;
 502         int offset;
 503
 504         if (of_stdout_device == NULL)
 505                 return -ENODEV;
 506
 507         /* The user has requested a console so this is already set up. */
 508         if (strstr(saved_command_line, "console="))
 509                 return -EBUSY;
 510
 511         prom_stdout = find_path_device(of_stdout_device);
 512         if (!prom_stdout)
 513                 return -ENODEV;
 514
 515         name = (char *)get_property(prom_stdout, "name", NULL);
 516         if (!name)
 517                 return -ENODEV;
 518
 519         if (strcmp(name, "serial") == 0) {
 520                 int i;
 521                 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
 522                 if (i > 8) {
 523                         switch (reg[1]) {
 524                                 case 0x3f8:
 525                                         offset = 0;
 526                                         break;
 527                                 case 0x2f8:
 528                                         offset = 1;
 529                                         break;
 530                                 case 0x898:
 531                                         offset = 2;
 532                                         break;
 533                                 case 0x890:
 534                                         offset = 3;
 535                                         break;
 536                                 default:
 537                                         /* We dont recognise the serial port */
 538                                         return -ENODEV;
 539                         }
 540                 }
 541         } else if (strcmp(name, "ch-a") == 0)
 542                 offset = 0;
 543         else if (strcmp(name, "ch-b") == 0)
 544                 offset = 1;
 545         else
 546                 return -ENODEV;
 547         return add_preferred_console("ttyS", offset, NULL);
 548 }
 549 console_initcall(set_preferred_console);
 550 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
 551 #endif /* CONFIG_PPC_MULTIPLATFORM */
 552
 553 struct bi_record *find_bootinfo(void)
 554 {
 555         struct bi_record *rec;
 556
 557         rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
 558         if ( rec->tag != BI_FIRST ) {
 559                 /*
 560                  * This 0x10000 offset is a terrible hack but it will go away when
 561                  * we have the bootloader handle all the relocation and
 562                  * prom calls -- Cort
 563                  */
 564                 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
 565                 if ( rec->tag != BI_FIRST )
 566                         return NULL;
 567         }
 568         return rec;
 569 }
 570
 571 void parse_bootinfo(struct bi_record *rec)
 572 {
 573         if (rec == NULL || rec->tag != BI_FIRST)
 574                 return;
 575         while (rec->tag != BI_LAST) {
 576                 ulong *data = rec->data;
 577                 switch (rec->tag) {
 578                 case BI_CMD_LINE:
 579                         strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
 580                         break;
 581                 case BI_SYSMAP:
 582                         sysmap = (char *)((data[0] >= (KERNELBASE)) ? data[0] :
 583                                           (data[0]+KERNELBASE));
 584                         sysmap_size = data[1];
 585                         break;
 586 #ifdef CONFIG_BLK_DEV_INITRD
 587                 case BI_INITRD:
 588                         initrd_start = data[0] + KERNELBASE;
 589                         initrd_end = data[0] + data[1] + KERNELBASE;
 590                         break;
 591 #endif /* CONFIG_BLK_DEV_INITRD */
 592 #ifdef CONFIG_PPC_MULTIPLATFORM
 593                 case BI_MACHTYPE:
 594                         _machine = data[0];
 595                         break;
 596 #endif
 597                 case BI_MEMSIZE:
 598                         boot_mem_size = data[0];
 599                         break;
 600                 }
 601                 rec = (struct bi_record *)((ulong)rec + rec->size);
 602         }
 603 }
 604
 605 /*
 606  * Find out what kind of machine we're on and save any data we need
 607  * from the early boot process (devtree is copied on pmac by prom_init()).
 608  * This is called very early on the boot process, after a minimal
 609  * MMU environment has been set up but before MMU_init is called.
 610  */
 611 void __init
 612 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
 613              unsigned long r6, unsigned long r7)
 614 {
 615 #ifdef CONFIG_CMDLINE
 616         strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
 617 #endif /* CONFIG_CMDLINE */
 618
 619 #ifdef CONFIG_6xx
 620         ppc_md.power_save = ppc6xx_idle;
 621 #endif
 622 #ifdef CONFIG_POWER4
 623         ppc_md.power_save = power4_idle;
 624 #endif
 625
 626         platform_init(r3, r4, r5, r6, r7);
 627
 628         if (ppc_md.progress)
 629                 ppc_md.progress("id mach(): done", 0x200);
 630 }
 631
 632 /* Checks "l2cr=xxxx" command-line option */
 633 int __init ppc_setup_l2cr(char *str)
 634 {
 635         if (cpu_has_feature(CPU_FTR_L2CR)) {
 636                 unsigned long val = simple_strtoul(str, NULL, 0);
 637                 printk(KERN_INFO "l2cr set to %lx\n", val);
 638                 _set_L2CR(0);           /* force invalidate by disable cache */
 639                 _set_L2CR(val);         /* and enable it */
 640         }
 641         return 1;
 642 }
 643 __setup("l2cr=", ppc_setup_l2cr);
 644
 645 #ifdef CONFIG_GENERIC_NVRAM
 646
 647 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
 648 unsigned char nvram_read_byte(int addr)
 649 {
 650         if (ppc_md.nvram_read_val)
 651                 return ppc_md.nvram_read_val(addr);
 652         return 0xff;
 653 }
 654 EXPORT_SYMBOL(nvram_read_byte);
 655
 656 void nvram_write_byte(unsigned char val, int addr)
 657 {
 658         if (ppc_md.nvram_write_val)
 659                 ppc_md.nvram_write_val(addr, val);
 660 }
 661 EXPORT_SYMBOL(nvram_write_byte);
 662
 663 void nvram_sync(void)
 664 {
 665         if (ppc_md.nvram_sync)
 666                 ppc_md.nvram_sync();
 667 }
 668 EXPORT_SYMBOL(nvram_sync);
 669
 670 #endif /* CONFIG_NVRAM */
 671
 672 static struct cpu cpu_devices[NR_CPUS];
 673
 674 int __init ppc_init(void)
 675 {
 676         int i;
 677
 678         /* clear the progress line */
 679         if ( ppc_md.progress ) ppc_md.progress("             ", 0xffff);
 680
 681         /* register CPU devices */
 682         for (i = 0; i < NR_CPUS; i++)
 683                 if (cpu_possible(i))
 684                         register_cpu(&cpu_devices[i], i, NULL);
 685
 686         /* call platform init */
 687         if (ppc_md.init != NULL) {
 688                 ppc_md.init();
 689         }
 690         return 0;
 691 }
 692
 693 arch_initcall(ppc_init);
 694
 695 /* Warning, IO base is not yet inited */
 696 void __init setup_arch(char **cmdline_p)
 697 {
 698         extern char *klimit;
 699         extern void do_init_bootmem(void);
 700
 701         /* so udelay does something sensible, assume <= 1000 bogomips */
 702         loops_per_jiffy = 500000000 / HZ;
 703
 704 #ifdef CONFIG_PPC_MULTIPLATFORM
 705         /* This could be called "early setup arch", it must be done
 706          * now because xmon need it
 707          */
 708         if (_machine == _MACH_Pmac)
 709                 pmac_feature_init();    /* New cool way */
 710 #endif
 711
 712 #ifdef CONFIG_XMON
 713         xmon_map_scc();
 714         if (strstr(cmd_line, "xmon"))
 715                 xmon(NULL);
 716 #endif /* CONFIG_XMON */
 717         if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
 718
 719 #if defined(CONFIG_KGDB)
 720         if (ppc_md.kgdb_map_scc)
 721                 ppc_md.kgdb_map_scc();
 722         set_debug_traps();
 723         if (strstr(cmd_line, "gdb")) {
 724                 if (ppc_md.progress)
 725                         ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
 726                 printk("kgdb breakpoint activated\n");
 727                 breakpoint();
 728         }
 729 #endif
 730
 731         /*
 732          * Set cache line size based on type of cpu as a default.
 733          * Systems with OF can look in the properties on the cpu node(s)
 734          * for a possibly more accurate value.
 735          */
 736         if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
 737                 dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
 738                 icache_bsize = cur_cpu_spec[0]->icache_bsize;
 739                 ucache_bsize = 0;
 740         } else
 741                 ucache_bsize = dcache_bsize = icache_bsize
 742                         = cur_cpu_spec[0]->dcache_bsize;
 743
 744         /* reboot on panic */
 745         panic_timeout = 180;
 746
 747         init_mm.start_code = PAGE_OFFSET;
 748         init_mm.end_code = (unsigned long) _etext;
 749         init_mm.end_data = (unsigned long) _edata;
 750         init_mm.brk = (unsigned long) klimit;
 751
 752         /* Save unparsed command line copy for /proc/cmdline */
 753         strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
 754         *cmdline_p = cmd_line;
 755
 756         parse_early_param();
 757
 758         /* set up the bootmem stuff with available memory */
 759         do_init_bootmem();
 760         if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
 761
 762 #ifdef CONFIG_PPC_OCP
 763         /* Initialize OCP device list */
 764         ocp_early_init();
 765         if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
 766 #endif
 767
 768 #ifdef CONFIG_DUMMY_CONSOLE
 769         conswitchp = &dummy_con;
 770 #endif
 771
 772         ppc_md.setup_arch();
 773         if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
 774
 775         paging_init();
 776
 777         /* this is for modules since _machine can be a define -- Cort */
 778         ppc_md.ppc_machine = _machine;
 779 }