arch/powerpc/platforms/powermac/setup.c

   1 /*
   2  *  arch/ppc/platforms/setup.c
   3  *
   4  *  PowerPC version
   5  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
   6  *
   7  *  Adapted for Power Macintosh by Paul Mackerras
   8  *    Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
   9  *
  10  *  Derived from "arch/alpha/kernel/setup.c"
  11  *    Copyright (C) 1995 Linus Torvalds
  12  *
  13  *  Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation; either version
  18  *  2 of the License, or (at your option) any later version.
  19  *
  20  */
  21
  22 /*
  23  * bootup setup stuff..
  24  */
  25
  26 #include <linux/config.h>
  27 #include <linux/init.h>
  28 #include <linux/errno.h>
  29 #include <linux/sched.h>
  30 #include <linux/kernel.h>
  31 #include <linux/mm.h>
  32 #include <linux/stddef.h>
  33 #include <linux/unistd.h>
  34 #include <linux/ptrace.h>
  35 #include <linux/slab.h>
  36 #include <linux/user.h>
  37 #include <linux/a.out.h>
  38 #include <linux/tty.h>
  39 #include <linux/string.h>
  40 #include <linux/delay.h>
  41 #include <linux/ioport.h>
  42 #include <linux/major.h>
  43 #include <linux/initrd.h>
  44 #include <linux/vt_kern.h>
  45 #include <linux/console.h>
  46 #include <linux/ide.h>
  47 #include <linux/pci.h>
  48 #include <linux/adb.h>
  49 #include <linux/cuda.h>
  50 #include <linux/pmu.h>
  51 #include <linux/irq.h>
  52 #include <linux/seq_file.h>
  53 #include <linux/root_dev.h>
  54 #include <linux/bitops.h>
  55 #include <linux/suspend.h>
  56
  57 #include <asm/reg.h>
  58 #include <asm/sections.h>
  59 #include <asm/prom.h>
  60 #include <asm/system.h>
  61 #include <asm/pgtable.h>
  62 #include <asm/io.h>
  63 #include <asm/pci-bridge.h>
  64 #include <asm/ohare.h>
  65 #include <asm/mediabay.h>
  66 #include <asm/machdep.h>
  67 #include <asm/dma.h>
  68 #include <asm/bootx.h>
  69 #include <asm/cputable.h>
  70 #include <asm/btext.h>
  71 #include <asm/pmac_feature.h>
  72 #include <asm/time.h>
  73 #include <asm/of_device.h>
  74 #include <asm/mmu_context.h>
  75
  76 #include "pmac.h"
  77
  78 #undef SHOW_GATWICK_IRQS
  79
  80 unsigned char drive_info;
  81
  82 int ppc_override_l2cr = 0;
  83 int ppc_override_l2cr_value;
  84 int has_l2cache = 0;
  85
  86 int pmac_newworld = 1;
  87
  88 static int current_root_goodness = -1;
  89
  90 extern int pmac_newworld;
  91
  92 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
  93
  94 extern void zs_kgdb_hook(int tty_num);
  95 static void ohare_init(void);
  96 #ifdef CONFIG_BOOTX_TEXT
  97 static void pmac_progress(char *s, unsigned short hex);
  98 #endif
  99
 100 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
 101
 102 #ifdef CONFIG_SMP
 103 extern struct smp_ops_t psurge_smp_ops;
 104 extern struct smp_ops_t core99_smp_ops;
 105 #endif /* CONFIG_SMP */
 106
 107 static int
 108 pmac_show_cpuinfo(struct seq_file *m)
 109 {
 110         struct device_node *np;
 111         char *pp;
 112         int plen;
 113         int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 114                 NULL, PMAC_MB_INFO_MODEL, 0);
 115         unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 116                 NULL, PMAC_MB_INFO_FLAGS, 0);
 117         char* mbname;
 118
 119         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0)
 120                 mbname = "Unknown";
 121
 122         /* find motherboard type */
 123         seq_printf(m, "machine\t\t: ");
 124         np = find_devices("device-tree");
 125         if (np != NULL) {
 126                 pp = (char *) get_property(np, "model", NULL);
 127                 if (pp != NULL)
 128                         seq_printf(m, "%s\n", pp);
 129                 else
 130                         seq_printf(m, "PowerMac\n");
 131                 pp = (char *) get_property(np, "compatible", &plen);
 132                 if (pp != NULL) {
 133                         seq_printf(m, "motherboard\t:");
 134                         while (plen > 0) {
 135                                 int l = strlen(pp) + 1;
 136                                 seq_printf(m, " %s", pp);
 137                                 plen -= l;
 138                                 pp += l;
 139                         }
 140                         seq_printf(m, "\n");
 141                 }
 142         } else
 143                 seq_printf(m, "PowerMac\n");
 144
 145         /* print parsed model */
 146         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
 147         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 148
 149         /* find l2 cache info */
 150         np = find_devices("l2-cache");
 151         if (np == 0)
 152                 np = find_type_devices("cache");
 153         if (np != 0) {
 154                 unsigned int *ic = (unsigned int *)
 155                         get_property(np, "i-cache-size", NULL);
 156                 unsigned int *dc = (unsigned int *)
 157                         get_property(np, "d-cache-size", NULL);
 158                 seq_printf(m, "L2 cache\t:");
 159                 has_l2cache = 1;
 160                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
 161                         seq_printf(m, " %dK unified", *dc / 1024);
 162                 } else {
 163                         if (ic)
 164                                 seq_printf(m, " %dK instruction", *ic / 1024);
 165                         if (dc)
 166                                 seq_printf(m, "%s %dK data",
 167                                            (ic? " +": ""), *dc / 1024);
 168                 }
 169                 pp = get_property(np, "ram-type", NULL);
 170                 if (pp)
 171                         seq_printf(m, " %s", pp);
 172                 seq_printf(m, "\n");
 173         }
 174
 175         /* find ram info */
 176         np = find_devices("memory");
 177         if (np != 0) {
 178                 int n;
 179                 struct reg_property *reg = (struct reg_property *)
 180                         get_property(np, "reg", &n);
 181
 182                 if (reg != 0) {
 183                         unsigned long total = 0;
 184
 185                         for (n /= sizeof(struct reg_property); n > 0; --n)
 186                                 total += (reg++)->size;
 187                         seq_printf(m, "memory\t\t: %luMB\n", total >> 20);
 188                 }
 189         }
 190
 191         /* Checks "l2cr-value" property in the registry */
 192         np = find_devices("cpus");
 193         if (np == 0)
 194                 np = find_type_devices("cpu");
 195         if (np != 0) {
 196                 unsigned int *l2cr = (unsigned int *)
 197                         get_property(np, "l2cr-value", NULL);
 198                 if (l2cr != 0) {
 199                         seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr);
 200                 }
 201         }
 202
 203         /* Indicate newworld/oldworld */
 204         seq_printf(m, "pmac-generation\t: %s\n",
 205                    pmac_newworld ? "NewWorld" : "OldWorld");
 206
 207
 208         return 0;
 209 }
 210
 211 static int
 212 pmac_show_percpuinfo(struct seq_file *m, int i)
 213 {
 214 #ifdef CONFIG_CPU_FREQ_PMAC
 215         extern unsigned int pmac_get_one_cpufreq(int i);
 216         unsigned int freq = pmac_get_one_cpufreq(i);
 217         if (freq != 0) {
 218                 seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
 219                 return 0;
 220         }
 221 #endif /* CONFIG_CPU_FREQ_PMAC */
 222         return of_show_percpuinfo(m, i);
 223 }
 224
 225 static volatile u32 *sysctrl_regs;
 226
 227 void __init
 228 pmac_setup_arch(void)
 229 {
 230         struct device_node *cpu;
 231         int *fp;
 232         unsigned long pvr;
 233
 234         pvr = PVR_VER(mfspr(SPRN_PVR));
 235
 236         /* Set loops_per_jiffy to a half-way reasonable value,
 237            for use until calibrate_delay gets called. */
 238         cpu = find_type_devices("cpu");
 239         if (cpu != 0) {
 240                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 241                 if (fp != 0) {
 242                         if (pvr == 4 || pvr >= 8)
 243                                 /* 604, G3, G4 etc. */
 244                                 loops_per_jiffy = *fp / HZ;
 245                         else
 246                                 /* 601, 603, etc. */
 247                                 loops_per_jiffy = *fp / (2*HZ);
 248                 } else
 249                         loops_per_jiffy = 50000000 / HZ;
 250         }
 251
 252         /* this area has the CPU identification register
 253            and some registers used by smp boards */
 254         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 255         ohare_init();
 256
 257         /* Lookup PCI hosts */
 258         pmac_find_bridges();
 259
 260         /* Checks "l2cr-value" property in the registry */
 261         if (cpu_has_feature(CPU_FTR_L2CR)) {
 262                 struct device_node *np = find_devices("cpus");
 263                 if (np == 0)
 264                         np = find_type_devices("cpu");
 265                 if (np != 0) {
 266                         unsigned int *l2cr = (unsigned int *)
 267                                 get_property(np, "l2cr-value", NULL);
 268                         if (l2cr != 0) {
 269                                 ppc_override_l2cr = 1;
 270                                 ppc_override_l2cr_value = *l2cr;
 271                                 _set_L2CR(0);
 272                                 _set_L2CR(ppc_override_l2cr_value);
 273                         }
 274                 }
 275         }
 276
 277         if (ppc_override_l2cr)
 278                 printk(KERN_INFO "L2CR overriden (0x%x), backside cache is %s\n",
 279                         ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000)
 280                                 ? "enabled" : "disabled");
 281
 282 #ifdef CONFIG_KGDB
 283         zs_kgdb_hook(0);
 284 #endif
 285
 286 #ifdef CONFIG_ADB_CUDA
 287         find_via_cuda();
 288 #else
 289         if (find_devices("via-cuda")) {
 290                 printk("WARNING ! Your machine is Cuda based but your kernel\n");
 291                 printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
 292         }
 293 #endif
 294 #ifdef CONFIG_ADB_PMU
 295         find_via_pmu();
 296 #else
 297         if (find_devices("via-pmu")) {
 298                 printk("WARNING ! Your machine is PMU based but your kernel\n");
 299                 printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
 300         }
 301 #endif
 302 #ifdef CONFIG_NVRAM
 303         pmac_nvram_init();
 304 #endif
 305 #ifdef CONFIG_BLK_DEV_INITRD
 306         if (initrd_start)
 307                 ROOT_DEV = Root_RAM0;
 308         else
 309 #endif
 310                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 311
 312 #ifdef CONFIG_SMP
 313         /* Check for Core99 */
 314         if (find_devices("uni-n") || find_devices("u3"))
 315                 ppc_md.smp_ops = &core99_smp_ops;
 316         else
 317                 ppc_md.smp_ops = &psurge_smp_ops;
 318 #endif /* CONFIG_SMP */
 319
 320         pci_create_OF_bus_map();
 321 }
 322
 323 static void __init ohare_init(void)
 324 {
 325         /*
 326          * Turn on the L2 cache.
 327          * We assume that we have a PSX memory controller iff
 328          * we have an ohare I/O controller.
 329          */
 330         if (find_devices("ohare") != NULL) {
 331                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
 332                         if (sysctrl_regs[4] & 0x10)
 333                                 sysctrl_regs[4] |= 0x04000020;
 334                         else
 335                                 sysctrl_regs[4] |= 0x04000000;
 336                         if(has_l2cache)
 337                                 printk(KERN_INFO "Level 2 cache enabled\n");
 338                 }
 339         }
 340 }
 341
 342 char *bootpath;
 343 char *bootdevice;
 344 void *boot_host;
 345 int boot_target;
 346 int boot_part;
 347 extern dev_t boot_dev;
 348
 349 #ifdef CONFIG_SCSI
 350 void __init
 351 note_scsi_host(struct device_node *node, void *host)
 352 {
 353         int l;
 354         char *p;
 355
 356         l = strlen(node->full_name);
 357         if (bootpath != NULL && bootdevice != NULL
 358             && strncmp(node->full_name, bootdevice, l) == 0
 359             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 360                 boot_host = host;
 361                 /*
 362                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 363                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 364                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 365                  * That is, the scsi target number doesn't get preserved.
 366                  * So we pick the target number out of bootpath and use that.
 367                  */
 368                 p = strstr(bootpath, "/sd@");
 369                 if (p != NULL) {
 370                         p += 4;
 371                         boot_target = simple_strtoul(p, NULL, 10);
 372                         p = strchr(p, ':');
 373                         if (p != NULL)
 374                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 375                 }
 376         }
 377 }
 378 EXPORT_SYMBOL(note_scsi_host);
 379 #endif
 380
 381 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 382 static dev_t __init
 383 find_ide_boot(void)
 384 {
 385         char *p;
 386         int n;
 387         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 388
 389         if (bootdevice == NULL)
 390                 return 0;
 391         p = strrchr(bootdevice, '/');
 392         if (p == NULL)
 393                 return 0;
 394         n = p - bootdevice;
 395
 396         return pmac_find_ide_boot(bootdevice, n);
 397 }
 398 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 399
 400 static void __init
 401 find_boot_device(void)
 402 {
 403 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 404         boot_dev = find_ide_boot();
 405 #endif
 406 }
 407
 408 static int initializing = 1;
 409 /* TODO: Merge the suspend-to-ram with the common code !!!
 410  * currently, this is a stub implementation for suspend-to-disk
 411  * only
 412  */
 413
 414 #ifdef CONFIG_SOFTWARE_SUSPEND
 415
 416 static int pmac_pm_prepare(suspend_state_t state)
 417 {
 418         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 419
 420         return 0;
 421 }
 422
 423 static int pmac_pm_enter(suspend_state_t state)
 424 {
 425         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 426
 427         /* Giveup the lazy FPU & vec so we don't have to back them
 428          * up from the low level code
 429          */
 430         enable_kernel_fp();
 431
 432 #ifdef CONFIG_ALTIVEC
 433         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 434                 enable_kernel_altivec();
 435 #endif /* CONFIG_ALTIVEC */
 436
 437         return 0;
 438 }
 439
 440 static int pmac_pm_finish(suspend_state_t state)
 441 {
 442         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 443
 444         /* Restore userland MMU context */
 445         set_context(current->active_mm->context, current->active_mm->pgd);
 446
 447         return 0;
 448 }
 449
 450 static struct pm_ops pmac_pm_ops = {
 451         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 452         .prepare        = pmac_pm_prepare,
 453         .enter          = pmac_pm_enter,
 454         .finish         = pmac_pm_finish,
 455 };
 456
 457 #endif /* CONFIG_SOFTWARE_SUSPEND */
 458
 459 static int pmac_late_init(void)
 460 {
 461         initializing = 0;
 462 #ifdef CONFIG_SOFTWARE_SUSPEND
 463         pm_set_ops(&pmac_pm_ops);
 464 #endif /* CONFIG_SOFTWARE_SUSPEND */
 465         return 0;
 466 }
 467
 468 late_initcall(pmac_late_init);
 469
 470 /* can't be __init - can be called whenever a disk is first accessed */
 471 void
 472 note_bootable_part(dev_t dev, int part, int goodness)
 473 {
 474         static int found_boot = 0;
 475         char *p;
 476
 477         if (!initializing)
 478                 return;
 479         if ((goodness <= current_root_goodness) &&
 480             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 481                 return;
 482         p = strstr(saved_command_line, "root=");
 483         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 484                 return;
 485
 486         if (!found_boot) {
 487                 find_boot_device();
 488                 found_boot = 1;
 489         }
 490         if (!boot_dev || dev == boot_dev) {
 491                 ROOT_DEV = dev + part;
 492                 boot_dev = 0;
 493                 current_root_goodness = goodness;
 494         }
 495 }
 496
 497 static void
 498 pmac_restart(char *cmd)
 499 {
 500 #ifdef CONFIG_ADB_CUDA
 501         struct adb_request req;
 502 #endif /* CONFIG_ADB_CUDA */
 503
 504         switch (sys_ctrler) {
 505 #ifdef CONFIG_ADB_CUDA
 506         case SYS_CTRLER_CUDA:
 507                 cuda_request(&req, NULL, 2, CUDA_PACKET,
 508                              CUDA_RESET_SYSTEM);
 509                 for (;;)
 510                         cuda_poll();
 511                 break;
 512 #endif /* CONFIG_ADB_CUDA */
 513 #ifdef CONFIG_ADB_PMU
 514         case SYS_CTRLER_PMU:
 515                 pmu_restart();
 516                 break;
 517 #endif /* CONFIG_ADB_PMU */
 518         default: ;
 519         }
 520 }
 521
 522 static void
 523 pmac_power_off(void)
 524 {
 525 #ifdef CONFIG_ADB_CUDA
 526         struct adb_request req;
 527 #endif /* CONFIG_ADB_CUDA */
 528
 529         switch (sys_ctrler) {
 530 #ifdef CONFIG_ADB_CUDA
 531         case SYS_CTRLER_CUDA:
 532                 cuda_request(&req, NULL, 2, CUDA_PACKET,
 533                              CUDA_POWERDOWN);
 534                 for (;;)
 535                         cuda_poll();
 536                 break;
 537 #endif /* CONFIG_ADB_CUDA */
 538 #ifdef CONFIG_ADB_PMU
 539         case SYS_CTRLER_PMU:
 540                 pmu_shutdown();
 541                 break;
 542 #endif /* CONFIG_ADB_PMU */
 543         default: ;
 544         }
 545 }
 546
 547 static void
 548 pmac_halt(void)
 549 {
 550         pmac_power_off();
 551 }
 552
 553 void __init pmac_init(void)
 554 {
 555         /* isa_io_base gets set in pmac_find_bridges */
 556         isa_mem_base = PMAC_ISA_MEM_BASE;
 557         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 558         ISA_DMA_THRESHOLD = ~0L;
 559         DMA_MODE_READ = 1;
 560         DMA_MODE_WRITE = 2;
 561
 562         ppc_md.setup_arch     = pmac_setup_arch;
 563         ppc_md.show_cpuinfo   = pmac_show_cpuinfo;
 564         ppc_md.show_percpuinfo = pmac_show_percpuinfo;
 565         ppc_md.irq_canonicalize = NULL;
 566         ppc_md.init_IRQ       = pmac_pic_init;
 567         ppc_md.get_irq        = pmac_get_irq; /* Changed later on ... */
 568
 569         ppc_md.pcibios_fixup  = pmac_pcibios_fixup;
 570         ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
 571         ppc_md.pcibios_after_init = pmac_pcibios_after_init;
 572         ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
 573
 574         ppc_md.restart        = pmac_restart;
 575         ppc_md.power_off      = pmac_power_off;
 576         ppc_md.halt           = pmac_halt;
 577
 578         ppc_md.time_init      = pmac_time_init;
 579         ppc_md.set_rtc_time   = pmac_set_rtc_time;
 580         ppc_md.get_rtc_time   = pmac_get_rtc_time;
 581         ppc_md.calibrate_decr = pmac_calibrate_decr;
 582
 583         ppc_md.feature_call   = pmac_do_feature_call;
 584
 585 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 586 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 587         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 588         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 589 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 590 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 591
 592 #ifdef CONFIG_BOOTX_TEXT
 593         ppc_md.progress = pmac_progress;
 594 #endif /* CONFIG_BOOTX_TEXT */
 595
 596         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 597
 598 }
 599
 600 #ifdef CONFIG_BOOTX_TEXT
 601 static void __init
 602 pmac_progress(char *s, unsigned short hex)
 603 {
 604         if (boot_text_mapped) {
 605                 btext_drawstring(s);
 606                 btext_drawchar('\n');
 607         }
 608 }
 609 #endif /* CONFIG_BOOTX_TEXT */
 610
 611 static int __init
 612 pmac_declare_of_platform_devices(void)
 613 {
 614         struct device_node *np;
 615
 616         np = find_devices("uni-n");
 617         if (np) {
 618                 for (np = np->child; np != NULL; np = np->sibling)
 619                         if (strncmp(np->name, "i2c", 3) == 0) {
 620                                 of_platform_device_create(np, "uni-n-i2c",
 621                                                           NULL);
 622                                 break;
 623                         }
 624         }
 625         np = find_devices("u3");
 626         if (np) {
 627                 for (np = np->child; np != NULL; np = np->sibling)
 628                         if (strncmp(np->name, "i2c", 3) == 0) {
 629                                 of_platform_device_create(np, "u3-i2c",
 630                                                           NULL);
 631                                 break;
 632                         }
 633         }
 634
 635         np = find_devices("valkyrie");
 636         if (np)
 637                 of_platform_device_create(np, "valkyrie", NULL);
 638         np = find_devices("platinum");
 639         if (np)
 640                 of_platform_device_create(np, "platinum", NULL);
 641
 642         return 0;
 643 }
 644
 645 device_initcall(pmac_declare_of_platform_devices);