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 static 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 static 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         printk(KERN_INFO "Using native/NAP idle loop\n");
 191 }
 192
 193 #ifdef CONFIG_SCSI
 194 void note_scsi_host(struct device_node *node, void *host)
 195 {
 196         /* Obsolete */
 197 }
 198 #endif
 199
 200
 201 static int initializing = 1;
 202
 203 static int pmac_late_init(void)
 204 {
 205         initializing = 0;
 206         return 0;
 207 }
 208
 209 late_initcall(pmac_late_init);
 210
 211 /* can't be __init - can be called whenever a disk is first accessed */
 212 void __pmac note_bootable_part(dev_t dev, int part, int goodness)
 213 {
 214         extern dev_t boot_dev;
 215         char *p;
 216
 217         if (!initializing)
 218                 return;
 219         if ((goodness <= current_root_goodness) &&
 220             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 221                 return;
 222         p = strstr(saved_command_line, "root=");
 223         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 224                 return;
 225
 226         if (!boot_dev || dev == boot_dev) {
 227                 ROOT_DEV = dev + part;
 228                 boot_dev = 0;
 229                 current_root_goodness = goodness;
 230         }
 231 }
 232
 233 static void __pmac pmac_restart(char *cmd)
 234 {
 235         switch(sys_ctrler) {
 236 #ifdef CONFIG_ADB_PMU
 237         case SYS_CTRLER_PMU:
 238                 pmu_restart();
 239                 break;
 240 #endif
 241
 242 #ifdef CONFIG_PMAC_SMU
 243         case SYS_CTRLER_SMU:
 244                 smu_restart();
 245                 break;
 246 #endif
 247         default:
 248                 ;
 249         }
 250 }
 251
 252 static void __pmac pmac_power_off(void)
 253 {
 254         switch(sys_ctrler) {
 255 #ifdef CONFIG_ADB_PMU
 256         case SYS_CTRLER_PMU:
 257                 pmu_shutdown();
 258                 break;
 259 #endif
 260 #ifdef CONFIG_PMAC_SMU
 261         case SYS_CTRLER_SMU:
 262                 smu_shutdown();
 263                 break;
 264 #endif
 265         default:
 266                 ;
 267         }
 268 }
 269
 270 static void __pmac pmac_halt(void)
 271 {
 272         pmac_power_off();
 273 }
 274
 275 #ifdef CONFIG_BOOTX_TEXT
 276 static int dummy_getc_poll(void)
 277 {
 278         return -1;
 279 }
 280
 281 static unsigned char dummy_getc(void)
 282 {
 283         return 0;
 284 }
 285
 286 static void btext_putc(unsigned char c)
 287 {
 288         btext_drawchar(c);
 289 }
 290
 291 static void __init init_boot_display(void)
 292 {
 293         char *name;
 294         struct device_node *np = NULL;
 295         int rc = -ENODEV;
 296
 297         printk("trying to initialize btext ...\n");
 298
 299         name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
 300         if (name != NULL) {
 301                 np = of_find_node_by_path(name);
 302                 if (np != NULL) {
 303                         if (strcmp(np->type, "display") != 0) {
 304                                 printk("boot stdout isn't a display !\n");
 305                                 of_node_put(np);
 306                                 np = NULL;
 307                         }
 308                 }
 309         }
 310         if (np)
 311                 rc = btext_initialize(np);
 312         if (rc == 0)
 313                 return;
 314
 315         for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
 316                 if (get_property(np, "linux,opened", NULL)) {
 317                         printk("trying %s ...\n", np->full_name);
 318                         rc = btext_initialize(np);
 319                         printk("result: %d\n", rc);
 320                 }
 321                 if (rc == 0)
 322                         return;
 323         }
 324 }
 325 #endif /* CONFIG_BOOTX_TEXT */
 326
 327 /*
 328  * Early initialization.
 329  */
 330 static void __init pmac_init_early(void)
 331 {
 332         DBG(" -> pmac_init_early\n");
 333
 334         /* Initialize hash table, from now on, we can take hash faults
 335          * and call ioremap
 336          */
 337         hpte_init_native();
 338
 339         /* Init SCC */
 340         if (strstr(cmd_line, "sccdbg")) {
 341                 sccdbg = 1;
 342                 udbg_init_scc(NULL);
 343         }
 344
 345         else {
 346 #ifdef CONFIG_BOOTX_TEXT
 347                 init_boot_display();
 348
 349                 ppc_md.udbg_putc = btext_putc;
 350                 ppc_md.udbg_getc = dummy_getc;
 351                 ppc_md.udbg_getc_poll = dummy_getc_poll;
 352 #endif /* CONFIG_BOOTX_TEXT */
 353         }
 354
 355         /* Setup interrupt mapping options */
 356         ppc64_interrupt_controller = IC_OPEN_PIC;
 357
 358         iommu_init_early_u3();
 359
 360         DBG(" <- pmac_init_early\n");
 361 }
 362
 363 static int pmac_u3_cascade(struct pt_regs *regs, void *data)
 364 {
 365         return mpic_get_one_irq((struct mpic *)data, regs);
 366 }
 367
 368 static __init void pmac_init_IRQ(void)
 369 {
 370         struct device_node *irqctrler  = NULL;
 371         struct device_node *irqctrler2 = NULL;
 372         struct device_node *np = NULL;
 373         struct mpic *mpic1, *mpic2;
 374
 375         /* We first try to detect Apple's new Core99 chipset, since mac-io
 376          * is quite different on those machines and contains an IBM MPIC2.
 377          */
 378         while ((np = of_find_node_by_type(np, "open-pic")) != NULL) {
 379                 struct device_node *parent = of_get_parent(np);
 380                 if (parent && !strcmp(parent->name, "u3"))
 381                         irqctrler2 = of_node_get(np);
 382                 else
 383                         irqctrler = of_node_get(np);
 384                 of_node_put(parent);
 385         }
 386         if (irqctrler != NULL && irqctrler->n_addrs > 0) {
 387                 unsigned char senses[128];
 388
 389                 printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n",
 390                        (unsigned int)irqctrler->addrs[0].address);
 391
 392                 prom_get_irq_senses(senses, 0, 128);
 393                 mpic1 = mpic_alloc(irqctrler->addrs[0].address,
 394                                    MPIC_PRIMARY | MPIC_WANTS_RESET,
 395                                    0, 0, 128, 256, senses, 128, " K2-MPIC  ");
 396                 BUG_ON(mpic1 == NULL);
 397                 mpic_init(mpic1);
 398
 399                 if (irqctrler2 != NULL && irqctrler2->n_intrs > 0 &&
 400                     irqctrler2->n_addrs > 0) {
 401                         printk(KERN_INFO "Slave OpenPIC at 0x%08x hooked on IRQ %d\n",
 402                                (u32)irqctrler2->addrs[0].address,
 403                                irqctrler2->intrs[0].line);
 404
 405                         pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler2, 0, 0);
 406                         prom_get_irq_senses(senses, 128, 128 + 128);
 407
 408                         /* We don't need to set MPIC_BROKEN_U3 here since we don't have
 409                          * hypertransport interrupts routed to it
 410                          */
 411                         mpic2 = mpic_alloc(irqctrler2->addrs[0].address,
 412                                            MPIC_BIG_ENDIAN | MPIC_WANTS_RESET,
 413                                            0, 128, 128, 0, senses, 128, " U3-MPIC  ");
 414                         BUG_ON(mpic2 == NULL);
 415                         mpic_init(mpic2);
 416                         mpic_setup_cascade(irqctrler2->intrs[0].line,
 417                                            pmac_u3_cascade, mpic2);
 418                 }
 419         }
 420         of_node_put(irqctrler);
 421         of_node_put(irqctrler2);
 422 }
 423
 424 static void __init pmac_progress(char *s, unsigned short hex)
 425 {
 426         if (sccdbg) {
 427                 udbg_puts(s);
 428                 udbg_puts("\n");
 429         }
 430 #ifdef CONFIG_BOOTX_TEXT
 431         else if (boot_text_mapped) {
 432                 btext_drawstring(s);
 433                 btext_drawstring("\n");
 434         }
 435 #endif /* CONFIG_BOOTX_TEXT */
 436 }
 437
 438 /*
 439  * pmac has no legacy IO, anything calling this function has to
 440  * fail or bad things will happen
 441  */
 442 static int pmac_check_legacy_ioport(unsigned int baseport)
 443 {
 444         return -ENODEV;
 445 }
 446
 447 static int __init pmac_declare_of_platform_devices(void)
 448 {
 449         struct device_node *np;
 450
 451         np = find_devices("u3");
 452         if (np) {
 453                 for (np = np->child; np != NULL; np = np->sibling)
 454                         if (strncmp(np->name, "i2c", 3) == 0) {
 455                                 of_platform_device_create(np, "u3-i2c");
 456                                 break;
 457                         }
 458         }
 459
 460         return 0;
 461 }
 462
 463 device_initcall(pmac_declare_of_platform_devices);
 464
 465 /*
 466  * Called very early, MMU is off, device-tree isn't unflattened
 467  */
 468 static int __init pmac_probe(int platform)
 469 {
 470         if (platform != PLATFORM_POWERMAC)
 471                 return 0;
 472         /*
 473          * On U3, the DART (iommu) must be allocated now since it
 474          * has an impact on htab_initialize (due to the large page it
 475          * occupies having to be broken up so the DART itself is not
 476          * part of the cacheable linar mapping
 477          */
 478         alloc_u3_dart_table();
 479
 480 #ifdef CONFIG_PMAC_SMU
 481         /*
 482          * SMU based G5s need some memory below 2Gb, at least the current
 483          * driver needs that. We have to allocate it now. We allocate 4k
 484          * (1 small page) for now.
 485          */
 486         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 487 #endif /* CONFIG_PMAC_SMU */
 488
 489         return 1;
 490 }
 491
 492 struct machdep_calls __initdata pmac_md = {
 493 #ifdef CONFIG_HOTPLUG_CPU
 494         .cpu_die                = generic_mach_cpu_die,
 495 #endif
 496         .probe                  = pmac_probe,
 497         .setup_arch             = pmac_setup_arch,
 498         .init_early             = pmac_init_early,
 499         .get_cpuinfo            = pmac_show_cpuinfo,
 500         .init_IRQ               = pmac_init_IRQ,
 501         .get_irq                = mpic_get_irq,
 502         .pcibios_fixup          = pmac_pcibios_fixup,
 503         .restart                = pmac_restart,
 504         .power_off              = pmac_power_off,
 505         .halt                   = pmac_halt,
 506         .get_boot_time          = pmac_get_boot_time,
 507         .set_rtc_time           = pmac_set_rtc_time,
 508         .get_rtc_time           = pmac_get_rtc_time,
 509         .calibrate_decr         = pmac_calibrate_decr,
 510         .feature_call           = pmac_do_feature_call,
 511         .progress               = pmac_progress,
 512         .check_legacy_ioport    = pmac_check_legacy_ioport,
 513         .idle_loop              = native_idle,
 514 };