arch/ppc64/kernel/pmac_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 #undef DEBUG
  27
  28 #include <linux/config.h>
  29 #include <linux/init.h>
  30 #include <linux/errno.h>
  31 #include <linux/sched.h>
  32 #include <linux/kernel.h>
  33 #include <linux/mm.h>
  34 #include <linux/stddef.h>
  35 #include <linux/unistd.h>
  36 #include <linux/ptrace.h>
  37 #include <linux/slab.h>
  38 #include <linux/user.h>
  39 #include <linux/a.out.h>
  40 #include <linux/tty.h>
  41 #include <linux/string.h>
  42 #include <linux/delay.h>
  43 #include <linux/ioport.h>
  44 #include <linux/major.h>
  45 #include <linux/initrd.h>
  46 #include <linux/vt_kern.h>
  47 #include <linux/console.h>
  48 #include <linux/ide.h>
  49 #include <linux/pci.h>
  50 #include <linux/adb.h>
  51 #include <linux/cuda.h>
  52 #include <linux/pmu.h>
  53 #include <linux/irq.h>
  54 #include <linux/seq_file.h>
  55 #include <linux/root_dev.h>
  56 #include <linux/bitops.h>
  57
  58 #include <asm/processor.h>
  59 #include <asm/sections.h>
  60 #include <asm/prom.h>
  61 #include <asm/system.h>
  62 #include <asm/io.h>
  63 #include <asm/pci-bridge.h>
  64 #include <asm/iommu.h>
  65 #include <asm/machdep.h>
  66 #include <asm/dma.h>
  67 #include <asm/btext.h>
  68 #include <asm/cputable.h>
  69 #include <asm/pmac_feature.h>
  70 #include <asm/time.h>
  71 #include <asm/of_device.h>
  72 #include <asm/lmb.h>
  73 #include <asm/smu.h>
  74
  75 #include "pmac.h"
  76 #include "mpic.h"
  77
  78 #ifdef DEBUG
  79 #define DBG(fmt...) udbg_printf(fmt)
  80 #else
  81 #define DBG(fmt...)
  82 #endif
  83
  84 static int current_root_goodness = -1;
  85 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
  86
  87 extern  int powersave_nap;
  88 int sccdbg;
  89
  90 sys_ctrler_t sys_ctrler;
  91 EXPORT_SYMBOL(sys_ctrler);
  92
  93 #ifdef CONFIG_PMAC_SMU
  94 unsigned long smu_cmdbuf_abs;
  95 EXPORT_SYMBOL(smu_cmdbuf_abs);
  96 #endif
  97
  98 extern void udbg_init_scc(struct device_node *np);
  99
 100 void __pmac pmac_show_cpuinfo(struct seq_file *m)
 101 {
 102         struct device_node *np;
 103         char *pp;
 104         int plen;
 105         char* mbname;
 106         int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 107                                         PMAC_MB_INFO_MODEL, 0);
 108         unsigned int mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 109                                                  PMAC_MB_INFO_FLAGS, 0);
 110
 111         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
 112                               (long)&mbname) != 0)
 113                 mbname = "Unknown";
 114
 115         /* find motherboard type */
 116         seq_printf(m, "machine\t\t: ");
 117         np = find_devices("device-tree");
 118         if (np != NULL) {
 119                 pp = (char *) get_property(np, "model", NULL);
 120                 if (pp != NULL)
 121                         seq_printf(m, "%s\n", pp);
 122                 else
 123                         seq_printf(m, "PowerMac\n");
 124                 pp = (char *) get_property(np, "compatible", &plen);
 125                 if (pp != NULL) {
 126                         seq_printf(m, "motherboard\t:");
 127                         while (plen > 0) {
 128                                 int l = strlen(pp) + 1;
 129                                 seq_printf(m, " %s", pp);
 130                                 plen -= l;
 131                                 pp += l;
 132                         }
 133                         seq_printf(m, "\n");
 134                 }
 135         } else
 136                 seq_printf(m, "PowerMac\n");
 137
 138         /* print parsed model */
 139         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
 140         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 141
 142         /* Indicate newworld */
 143         seq_printf(m, "pmac-generation\t: NewWorld\n");
 144 }
 145
 146
 147 void __init pmac_setup_arch(void)
 148 {
 149         /* init to some ~sane value until calibrate_delay() runs */
 150         loops_per_jiffy = 50000000;
 151
 152         /* Probe motherboard chipset */
 153         pmac_feature_init();
 154 #if 0
 155         /* Lock-enable the SCC channel used for debug */
 156         if (sccdbg) {
 157                 np = of_find_node_by_name(NULL, "escc");
 158                 if (np)
 159                         pmac_call_feature(PMAC_FTR_SCC_ENABLE, np,
 160                                           PMAC_SCC_ASYNC | PMAC_SCC_FLAG_XMON, 1);
 161         }
 162 #endif
 163         /* We can NAP */
 164         powersave_nap = 1;
 165
 166 #ifdef CONFIG_ADB_PMU
 167         /* Initialize the PMU if any */
 168         find_via_pmu();
 169 #endif
 170 #ifdef CONFIG_PMAC_SMU
 171         /* Initialize the SMU if any */
 172         smu_init();
 173 #endif
 174
 175         /* Init NVRAM access */
 176         pmac_nvram_init();
 177
 178         /* Setup SMP callback */
 179 #ifdef CONFIG_SMP
 180         pmac_setup_smp();
 181 #endif
 182
 183         /* Lookup PCI hosts */
 184         pmac_pci_init();
 185
 186 #ifdef CONFIG_DUMMY_CONSOLE
 187         conswitchp = &dummy_con;
 188 #endif
 189 }
 190
 191 #ifdef CONFIG_SCSI
 192 void note_scsi_host(struct device_node *node, void *host)
 193 {
 194         /* Obsolete */
 195 }
 196 #endif
 197
 198
 199 static int initializing = 1;
 200
 201 static int pmac_late_init(void)
 202 {
 203         initializing = 0;
 204         return 0;
 205 }
 206
 207 late_initcall(pmac_late_init);
 208
 209 /* can't be __init - can be called whenever a disk is first accessed */
 210 void __pmac note_bootable_part(dev_t dev, int part, int goodness)
 211 {
 212         extern dev_t boot_dev;
 213         char *p;
 214
 215         if (!initializing)
 216                 return;
 217         if ((goodness <= current_root_goodness) &&
 218             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 219                 return;
 220         p = strstr(saved_command_line, "root=");
 221         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 222                 return;
 223
 224         if (!boot_dev || dev == boot_dev) {
 225                 ROOT_DEV = dev + part;
 226                 boot_dev = 0;
 227                 current_root_goodness = goodness;
 228         }
 229 }
 230
 231 void __pmac pmac_restart(char *cmd)
 232 {
 233         switch(sys_ctrler) {
 234 #ifdef CONFIG_ADB_PMU
 235         case SYS_CTRLER_PMU:
 236                 pmu_restart();
 237                 break;
 238 #endif
 239
 240 #ifdef CONFIG_PMAC_SMU
 241         case SYS_CTRLER_SMU:
 242                 smu_restart();
 243                 break;
 244 #endif
 245         default:
 246                 ;
 247         }
 248 }
 249
 250 void __pmac pmac_power_off(void)
 251 {
 252         switch(sys_ctrler) {
 253 #ifdef CONFIG_ADB_PMU
 254         case SYS_CTRLER_PMU:
 255                 pmu_shutdown();
 256                 break;
 257 #endif
 258 #ifdef CONFIG_PMAC_SMU
 259         case SYS_CTRLER_SMU:
 260                 smu_shutdown();
 261                 break;
 262 #endif
 263         default:
 264                 ;
 265         }
 266 }
 267
 268 void __pmac pmac_halt(void)
 269 {
 270         pmac_power_off();
 271 }
 272
 273 #ifdef CONFIG_BOOTX_TEXT
 274 static int dummy_getc_poll(void)
 275 {
 276         return -1;
 277 }
 278
 279 static unsigned char dummy_getc(void)
 280 {
 281         return 0;
 282 }
 283
 284 static void btext_putc(unsigned char c)
 285 {
 286         btext_drawchar(c);
 287 }
 288
 289 static void __init init_boot_display(void)
 290 {
 291         char *name;
 292         struct device_node *np = NULL;
 293         int rc = -ENODEV;
 294
 295         printk("trying to initialize btext ...\n");
 296
 297         name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
 298         if (name != NULL) {
 299                 np = of_find_node_by_path(name);
 300                 if (np != NULL) {
 301                         if (strcmp(np->type, "display") != 0) {
 302                                 printk("boot stdout isn't a display !\n");
 303                                 of_node_put(np);
 304                                 np = NULL;
 305                         }
 306                 }
 307         }
 308         if (np)
 309                 rc = btext_initialize(np);
 310         if (rc == 0)
 311                 return;
 312
 313         for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
 314                 if (get_property(np, "linux,opened", NULL)) {
 315                         printk("trying %s ...\n", np->full_name);
 316                         rc = btext_initialize(np);
 317                         printk("result: %d\n", rc);
 318                 }
 319                 if (rc == 0)
 320                         return;
 321         }
 322 }
 323 #endif /* CONFIG_BOOTX_TEXT */
 324
 325 /*
 326  * Early initialization.
 327  */
 328 void __init pmac_init_early(void)
 329 {
 330         DBG(" -> pmac_init_early\n");
 331
 332         /* Initialize hash table, from now on, we can take hash faults
 333          * and call ioremap
 334          */
 335         hpte_init_native();
 336
 337         /* Init SCC */
 338         if (strstr(cmd_line, "sccdbg")) {
 339                 sccdbg = 1;
 340                 udbg_init_scc(NULL);
 341         }
 342
 343         else {
 344 #ifdef CONFIG_BOOTX_TEXT
 345                 init_boot_display();
 346
 347                 ppc_md.udbg_putc = btext_putc;
 348                 ppc_md.udbg_getc = dummy_getc;
 349                 ppc_md.udbg_getc_poll = dummy_getc_poll;
 350 #endif /* CONFIG_BOOTX_TEXT */
 351         }
 352
 353         /* Setup interrupt mapping options */
 354         ppc64_interrupt_controller = IC_OPEN_PIC;
 355
 356         iommu_init_early_u3();
 357
 358         DBG(" <- pmac_init_early\n");
 359 }
 360
 361 static int pmac_u3_cascade(struct pt_regs *regs, void *data)
 362 {
 363         return mpic_get_one_irq((struct mpic *)data, regs);
 364 }
 365
 366 static __init void pmac_init_IRQ(void)
 367 {
 368         struct device_node *irqctrler  = NULL;
 369         struct device_node *irqctrler2 = NULL;
 370         struct device_node *np = NULL;
 371         struct mpic *mpic1, *mpic2;
 372
 373         /* We first try to detect Apple's new Core99 chipset, since mac-io
 374          * is quite different on those machines and contains an IBM MPIC2.
 375          */
 376         while ((np = of_find_node_by_type(np, "open-pic")) != NULL) {
 377                 struct device_node *parent = of_get_parent(np);
 378                 if (parent && !strcmp(parent->name, "u3"))
 379                         irqctrler2 = of_node_get(np);
 380                 else
 381                         irqctrler = of_node_get(np);
 382                 of_node_put(parent);
 383         }
 384         if (irqctrler != NULL && irqctrler->n_addrs > 0) {
 385                 unsigned char senses[128];
 386
 387                 printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n",
 388                        (unsigned int)irqctrler->addrs[0].address);
 389
 390                 prom_get_irq_senses(senses, 0, 128);
 391                 mpic1 = mpic_alloc(irqctrler->addrs[0].address,
 392                                    MPIC_PRIMARY | MPIC_WANTS_RESET,
 393                                    0, 0, 128, 256, senses, 128, " K2-MPIC  ");
 394                 BUG_ON(mpic1 == NULL);
 395                 mpic_init(mpic1);
 396
 397                 if (irqctrler2 != NULL && irqctrler2->n_intrs > 0 &&
 398                     irqctrler2->n_addrs > 0) {
 399                         printk(KERN_INFO "Slave OpenPIC at 0x%08x hooked on IRQ %d\n",
 400                                (u32)irqctrler2->addrs[0].address,
 401                                irqctrler2->intrs[0].line);
 402
 403                         pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler2, 0, 0);
 404                         prom_get_irq_senses(senses, 128, 128 + 128);
 405
 406                         /* We don't need to set MPIC_BROKEN_U3 here since we don't have
 407                          * hypertransport interrupts routed to it
 408                          */
 409                         mpic2 = mpic_alloc(irqctrler2->addrs[0].address,
 410                                            MPIC_BIG_ENDIAN | MPIC_WANTS_RESET,
 411                                            0, 128, 128, 0, senses, 128, " U3-MPIC  ");
 412                         BUG_ON(mpic2 == NULL);
 413                         mpic_init(mpic2);
 414                         mpic_setup_cascade(irqctrler2->intrs[0].line,
 415                                            pmac_u3_cascade, mpic2);
 416                 }
 417         }
 418         of_node_put(irqctrler);
 419         of_node_put(irqctrler2);
 420 }
 421
 422 static void __init pmac_progress(char *s, unsigned short hex)
 423 {
 424         if (sccdbg) {
 425                 udbg_puts(s);
 426                 udbg_puts("\n");
 427         }
 428 #ifdef CONFIG_BOOTX_TEXT
 429         else if (boot_text_mapped) {
 430                 btext_drawstring(s);
 431                 btext_drawstring("\n");
 432         }
 433 #endif /* CONFIG_BOOTX_TEXT */
 434 }
 435
 436 /*
 437  * pmac has no legacy IO, anything calling this function has to
 438  * fail or bad things will happen
 439  */
 440 static int pmac_check_legacy_ioport(unsigned int baseport)
 441 {
 442         return -ENODEV;
 443 }
 444
 445 static int __init pmac_declare_of_platform_devices(void)
 446 {
 447         struct device_node *np;
 448
 449         np = find_devices("u3");
 450         if (np) {
 451                 for (np = np->child; np != NULL; np = np->sibling)
 452                         if (strncmp(np->name, "i2c", 3) == 0) {
 453                                 of_platform_device_create(np, "u3-i2c");
 454                                 break;
 455                         }
 456         }
 457
 458         return 0;
 459 }
 460
 461 device_initcall(pmac_declare_of_platform_devices);
 462
 463 /*
 464  * Called very early, MMU is off, device-tree isn't unflattened
 465  */
 466 static int __init pmac_probe(int platform)
 467 {
 468         if (platform != PLATFORM_POWERMAC)
 469                 return 0;
 470         /*
 471          * On U3, the DART (iommu) must be allocated now since it
 472          * has an impact on htab_initialize (due to the large page it
 473          * occupies having to be broken up so the DART itself is not
 474          * part of the cacheable linar mapping
 475          */
 476         alloc_u3_dart_table();
 477
 478 #ifdef CONFIG_PMAC_SMU
 479         /*
 480          * SMU based G5s need some memory below 2Gb, at least the current
 481          * driver needs that. We have to allocate it now. We allocate 4k
 482          * (1 small page) for now.
 483          */
 484         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 485 #endif /* CONFIG_PMAC_SMU */
 486
 487         return 1;
 488 }
 489
 490 struct machdep_calls __initdata pmac_md = {
 491 #ifdef CONFIG_HOTPLUG_CPU
 492         .cpu_die                = generic_mach_cpu_die,
 493 #endif
 494         .probe                  = pmac_probe,
 495         .setup_arch             = pmac_setup_arch,
 496         .init_early             = pmac_init_early,
 497         .get_cpuinfo            = pmac_show_cpuinfo,
 498         .init_IRQ               = pmac_init_IRQ,
 499         .get_irq                = mpic_get_irq,
 500         .pcibios_fixup          = pmac_pcibios_fixup,
 501         .restart                = pmac_restart,
 502         .power_off              = pmac_power_off,
 503         .halt                   = pmac_halt,
 504         .get_boot_time          = pmac_get_boot_time,
 505         .set_rtc_time           = pmac_set_rtc_time,
 506         .get_rtc_time           = pmac_get_rtc_time,
 507         .calibrate_decr         = pmac_calibrate_decr,
 508         .feature_call           = pmac_do_feature_call,
 509         .progress               = pmac_progress,
 510         .check_legacy_ioport    = pmac_check_legacy_ioport
 511 };