arch/alpha/kernel/setup.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/arch/alpha/kernel/setup.c
   4  *
   5  *  Copyright (C) 1995  Linus Torvalds
   6  */
   7
   8 /* 2.3.x bootmem, 1999 Andrea Arcangeli <andrea@suse.de> */
   9
  10 /*
  11  * Bootup setup stuff.
  12  */
  13
  14 #include <linux/sched.h>
  15 #include <linux/kernel.h>
  16 #include <linux/mm.h>
  17 #include <linux/stddef.h>
  18 #include <linux/unistd.h>
  19 #include <linux/ptrace.h>
  20 #include <linux/slab.h>
  21 #include <linux/user.h>
  22 #include <linux/screen_info.h>
  23 #include <linux/delay.h>
  24 #include <linux/mc146818rtc.h>
  25 #include <linux/console.h>
  26 #include <linux/cpu.h>
  27 #include <linux/errno.h>
  28 #include <linux/init.h>
  29 #include <linux/string.h>
  30 #include <linux/ioport.h>
  31 #include <linux/panic_notifier.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/memblock.h>
  34 #include <linux/pci.h>
  35 #include <linux/seq_file.h>
  36 #include <linux/root_dev.h>
  37 #include <linux/initrd.h>
  38 #include <linux/eisa.h>
  39 #include <linux/pfn.h>
  40 #ifdef CONFIG_MAGIC_SYSRQ
  41 #include <linux/sysrq.h>
  42 #include <linux/reboot.h>
  43 #endif
  44 #include <linux/notifier.h>
  45 #include <asm/setup.h>
  46 #include <asm/io.h>
  47 #include <linux/log2.h>
  48 #include <linux/export.h>
  49
  50 static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
  51 static struct notifier_block alpha_panic_block = {
  52         alpha_panic_event,
  53         NULL,
  54         INT_MAX /* try to do it first */
  55 };
  56
  57 #include <linux/uaccess.h>
  58 #include <asm/hwrpb.h>
  59 #include <asm/dma.h>
  60 #include <asm/mmu_context.h>
  61 #include <asm/console.h>
  62
  63 #include "proto.h"
  64 #include "pci_impl.h"
  65
  66
  67 struct hwrpb_struct *hwrpb;
  68 EXPORT_SYMBOL(hwrpb);
  69 unsigned long srm_hae;
  70
  71 int alpha_l1i_cacheshape;
  72 int alpha_l1d_cacheshape;
  73 int alpha_l2_cacheshape;
  74 int alpha_l3_cacheshape;
  75
  76 #ifdef CONFIG_VERBOSE_MCHECK
  77 /* 0=minimum, 1=verbose, 2=all */
  78 /* These can be overridden via the command line, ie "verbose_mcheck=2") */
  79 unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
  80 #endif
  81
  82 /* Which processor we booted from.  */
  83 int boot_cpuid;
  84
  85 /*
  86  * Using SRM callbacks for initial console output. This works from
  87  * setup_arch() time through the end of time_init(), as those places
  88  * are under our (Alpha) control.
  89
  90  * "srmcons" specified in the boot command arguments allows us to
  91  * see kernel messages during the period of time before the true
  92  * console device is "registered" during console_init().
  93  * As of this version (2.5.59), console_init() will call
  94  * disable_early_printk() as the last action before initializing
  95  * the console drivers. That's the last possible time srmcons can be
  96  * unregistered without interfering with console behavior.
  97  *
  98  * By default, OFF; set it with a bootcommand arg of "srmcons" or
  99  * "console=srm". The meaning of these two args is:
 100  *     "srmcons"     - early callback prints
 101  *     "console=srm" - full callback based console, including early prints
 102  */
 103 int srmcons_output = 0;
 104
 105 /* Enforce a memory size limit; useful for testing. By default, none. */
 106 unsigned long mem_size_limit = 0;
 107
 108 /* Set AGP GART window size (0 means disabled). */
 109 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
 110
 111 #ifdef CONFIG_ALPHA_GENERIC
 112 struct alpha_machine_vector alpha_mv;
 113 EXPORT_SYMBOL(alpha_mv);
 114 #endif
 115
 116 #ifndef alpha_using_srm
 117 int alpha_using_srm;
 118 EXPORT_SYMBOL(alpha_using_srm);
 119 #endif
 120
 121 #ifndef alpha_using_qemu
 122 int alpha_using_qemu;
 123 #endif
 124
 125 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
 126                                                unsigned long);
 127 static struct alpha_machine_vector *get_sysvec_byname(const char *);
 128 static void get_sysnames(unsigned long, unsigned long, unsigned long,
 129                          char **, char **);
 130 static void determine_cpu_caches (unsigned int);
 131
 132 static char __initdata command_line[COMMAND_LINE_SIZE];
 133
 134 /*
 135  * The format of "screen_info" is strange, and due to early
 136  * i386-setup code. This is just enough to make the console
 137  * code think we're on a VGA color display.
 138  */
 139
 140 struct screen_info screen_info = {
 141         .orig_x = 0,
 142         .orig_y = 25,
 143         .orig_video_cols = 80,
 144         .orig_video_lines = 25,
 145         .orig_video_isVGA = 1,
 146         .orig_video_points = 16
 147 };
 148
 149 EXPORT_SYMBOL(screen_info);
 150
 151 /*
 152  * The direct map I/O window, if any.  This should be the same
 153  * for all busses, since it's used by virt_to_bus.
 154  */
 155
 156 unsigned long __direct_map_base;
 157 unsigned long __direct_map_size;
 158 EXPORT_SYMBOL(__direct_map_base);
 159 EXPORT_SYMBOL(__direct_map_size);
 160
 161 /*
 162  * Declare all of the machine vectors.
 163  */
 164
 165 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either
 166    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
 167    to the assembler.  */
 168
 169 #define WEAK(X) \
 170         extern struct alpha_machine_vector X; \
 171         asm(".weak "#X)
 172
 173 WEAK(alcor_mv);
 174 WEAK(alphabook1_mv);
 175 WEAK(avanti_mv);
 176 WEAK(cabriolet_mv);
 177 WEAK(clipper_mv);
 178 WEAK(dp264_mv);
 179 WEAK(eb164_mv);
 180 WEAK(eb64p_mv);
 181 WEAK(eb66_mv);
 182 WEAK(eb66p_mv);
 183 WEAK(eiger_mv);
 184 WEAK(jensen_mv);
 185 WEAK(lx164_mv);
 186 WEAK(lynx_mv);
 187 WEAK(marvel_ev7_mv);
 188 WEAK(miata_mv);
 189 WEAK(mikasa_mv);
 190 WEAK(mikasa_primo_mv);
 191 WEAK(monet_mv);
 192 WEAK(nautilus_mv);
 193 WEAK(noname_mv);
 194 WEAK(noritake_mv);
 195 WEAK(noritake_primo_mv);
 196 WEAK(p2k_mv);
 197 WEAK(pc164_mv);
 198 WEAK(privateer_mv);
 199 WEAK(rawhide_mv);
 200 WEAK(ruffian_mv);
 201 WEAK(rx164_mv);
 202 WEAK(sable_mv);
 203 WEAK(sable_gamma_mv);
 204 WEAK(shark_mv);
 205 WEAK(sx164_mv);
 206 WEAK(takara_mv);
 207 WEAK(titan_mv);
 208 WEAK(webbrick_mv);
 209 WEAK(wildfire_mv);
 210 WEAK(xl_mv);
 211 WEAK(xlt_mv);
 212
 213 #undef WEAK
 214
 215 /*
 216  * I/O resources inherited from PeeCees.  Except for perhaps the
 217  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
 218  *
 219  * ??? If this becomes less standard, move the struct out into the
 220  * machine vector.
 221  */
 222
 223 static void __init
 224 reserve_std_resources(void)
 225 {
 226         static struct resource standard_io_resources[] = {
 227                 { .name = "rtc", .start = -1, .end = -1 },
 228                 { .name = "dma1", .start = 0x00, .end = 0x1f },
 229                 { .name = "pic1", .start = 0x20, .end = 0x3f },
 230                 { .name = "timer", .start = 0x40, .end = 0x5f },
 231                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
 232                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
 233                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
 234                 { .name = "dma2", .start = 0xc0, .end = 0xdf },
 235         };
 236
 237         struct resource *io = &ioport_resource;
 238         size_t i;
 239
 240         if (hose_head) {
 241                 struct pci_controller *hose;
 242                 for (hose = hose_head; hose; hose = hose->next)
 243                         if (hose->index == 0) {
 244                                 io = hose->io_space;
 245                                 break;
 246                         }
 247         }
 248
 249         /* Fix up for the Jensen's queer RTC placement.  */
 250         standard_io_resources[0].start = RTC_PORT(0);
 251         standard_io_resources[0].end = RTC_PORT(0) + 0x0f;
 252
 253         for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
 254                 request_resource(io, standard_io_resources+i);
 255 }
 256
 257 #define PFN_MAX         PFN_DOWN(0x80000000)
 258 #define for_each_mem_cluster(memdesc, _cluster, i)              \
 259         for ((_cluster) = (memdesc)->cluster, (i) = 0;          \
 260              (i) < (memdesc)->numclusters; (i)++, (_cluster)++)
 261
 262 static unsigned long __init
 263 get_mem_size_limit(char *s)
 264 {
 265         unsigned long end = 0;
 266         char *from = s;
 267
 268         end = simple_strtoul(from, &from, 0);
 269         if ( *from == 'K' || *from == 'k' ) {
 270                 end = end << 10;
 271                 from++;
 272         } else if ( *from == 'M' || *from == 'm' ) {
 273                 end = end << 20;
 274                 from++;
 275         } else if ( *from == 'G' || *from == 'g' ) {
 276                 end = end << 30;
 277                 from++;
 278         }
 279         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
 280 }
 281
 282 #ifdef CONFIG_BLK_DEV_INITRD
 283 void * __init
 284 move_initrd(unsigned long mem_limit)
 285 {
 286         void *start;
 287         unsigned long size;
 288
 289         size = initrd_end - initrd_start;
 290         start = memblock_alloc(PAGE_ALIGN(size), PAGE_SIZE);
 291         if (!start || __pa(start) + size > mem_limit) {
 292                 initrd_start = initrd_end = 0;
 293                 return NULL;
 294         }
 295         memmove(start, (void *)initrd_start, size);
 296         initrd_start = (unsigned long)start;
 297         initrd_end = initrd_start + size;
 298         printk("initrd moved to %p\n", start);
 299         return start;
 300 }
 301 #endif
 302
 303 static void __init
 304 setup_memory(void *kernel_end)
 305 {
 306         struct memclust_struct * cluster;
 307         struct memdesc_struct * memdesc;
 308         unsigned long kernel_size;
 309         unsigned long i;
 310
 311         /* Find free clusters, and init and free the bootmem accordingly.  */
 312         memdesc = (struct memdesc_struct *)
 313           (hwrpb->mddt_offset + (unsigned long) hwrpb);
 314
 315         for_each_mem_cluster(memdesc, cluster, i) {
 316                 unsigned long end;
 317
 318                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
 319                        i, cluster->usage, cluster->start_pfn,
 320                        cluster->start_pfn + cluster->numpages);
 321
 322                 end = cluster->start_pfn + cluster->numpages;
 323                 if (end > max_low_pfn)
 324                         max_low_pfn = end;
 325
 326                 memblock_add(PFN_PHYS(cluster->start_pfn),
 327                              cluster->numpages << PAGE_SHIFT);
 328
 329                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
 330                    non-volatile memory -- we might want to mark
 331                    this for later.  */
 332                 if (cluster->usage & 3)
 333                         memblock_reserve(PFN_PHYS(cluster->start_pfn),
 334                                          cluster->numpages << PAGE_SHIFT);
 335         }
 336
 337         /*
 338          * Except for the NUMA systems (wildfire, marvel) all of the
 339          * Alpha systems we run on support 32GB of memory or less.
 340          * Since the NUMA systems introduce large holes in memory addressing,
 341          * we can get into a situation where there is not enough contiguous
 342          * memory for the memory map.
 343          *
 344          * Limit memory to the first 32GB to limit the NUMA systems to
 345          * memory on their first node (wildfire) or 2 (marvel) to avoid
 346          * not being able to produce the memory map. In order to access
 347          * all of the memory on the NUMA systems, build with discontiguous
 348          * memory support.
 349          *
 350          * If the user specified a memory limit, let that memory limit stand.
 351          */
 352         if (!mem_size_limit)
 353                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
 354
 355         if (mem_size_limit && max_low_pfn >= mem_size_limit)
 356         {
 357                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
 358                        mem_size_limit << (PAGE_SHIFT - 10),
 359                        max_low_pfn    << (PAGE_SHIFT - 10));
 360                 max_low_pfn = mem_size_limit;
 361         }
 362
 363         /* Reserve the kernel memory. */
 364         kernel_size = virt_to_phys(kernel_end) - KERNEL_START_PHYS;
 365         memblock_reserve(KERNEL_START_PHYS, kernel_size);
 366
 367 #ifdef CONFIG_BLK_DEV_INITRD
 368         initrd_start = INITRD_START;
 369         if (initrd_start) {
 370                 initrd_end = initrd_start+INITRD_SIZE;
 371                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
 372                        (void *) initrd_start, INITRD_SIZE);
 373
 374                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
 375                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
 376                                 printk("initrd extends beyond end of memory "
 377                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
 378                                        initrd_end,
 379                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
 380                 } else {
 381                         memblock_reserve(virt_to_phys((void *)initrd_start),
 382                                         INITRD_SIZE);
 383                 }
 384         }
 385 #endif /* CONFIG_BLK_DEV_INITRD */
 386 }
 387
 388 int __init
 389 page_is_ram(unsigned long pfn)
 390 {
 391         struct memclust_struct * cluster;
 392         struct memdesc_struct * memdesc;
 393         unsigned long i;
 394
 395         memdesc = (struct memdesc_struct *)
 396                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
 397         for_each_mem_cluster(memdesc, cluster, i)
 398         {
 399                 if (pfn >= cluster->start_pfn  &&
 400                     pfn < cluster->start_pfn + cluster->numpages) {
 401                         return (cluster->usage & 3) ? 0 : 1;
 402                 }
 403         }
 404
 405         return 0;
 406 }
 407
 408 static int __init
 409 register_cpus(void)
 410 {
 411         int i;
 412
 413         for_each_possible_cpu(i) {
 414                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
 415                 if (!p)
 416                         return -ENOMEM;
 417                 register_cpu(p, i);
 418         }
 419         return 0;
 420 }
 421
 422 arch_initcall(register_cpus);
 423
 424 #ifdef CONFIG_MAGIC_SYSRQ
 425 static void sysrq_reboot_handler(int unused)
 426 {
 427         machine_halt();
 428 }
 429
 430 static const struct sysrq_key_op srm_sysrq_reboot_op = {
 431         .handler        = sysrq_reboot_handler,
 432         .help_msg       = "reboot(b)",
 433         .action_msg     = "Resetting",
 434         .enable_mask    = SYSRQ_ENABLE_BOOT,
 435 };
 436 #endif
 437
 438 void __init
 439 setup_arch(char **cmdline_p)
 440 {
 441         extern char _end[];
 442
 443         struct alpha_machine_vector *vec = NULL;
 444         struct percpu_struct *cpu;
 445         char *type_name, *var_name, *p;
 446         void *kernel_end = _end; /* end of kernel */
 447         char *args = command_line;
 448
 449         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
 450         boot_cpuid = hard_smp_processor_id();
 451
 452         /*
 453          * Pre-process the system type to make sure it will be valid.
 454          *
 455          * This may restore real CABRIO and EB66+ family names, ie
 456          * EB64+ and EB66.
 457          *
 458          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
 459          * and AS1200 (DIGITAL Server 5000 series) have the type as
 460          * the negative of the real one.
 461          */
 462         if ((long)hwrpb->sys_type < 0) {
 463                 hwrpb->sys_type = -((long)hwrpb->sys_type);
 464                 hwrpb_update_checksum(hwrpb);
 465         }
 466
 467         /* Register a call for panic conditions. */
 468         atomic_notifier_chain_register(&panic_notifier_list,
 469                         &alpha_panic_block);
 470
 471 #ifndef alpha_using_srm
 472         /* Assume that we've booted from SRM if we haven't booted from MILO.
 473            Detect the later by looking for "MILO" in the system serial nr.  */
 474         alpha_using_srm = !str_has_prefix((const char *)hwrpb->ssn, "MILO");
 475 #endif
 476 #ifndef alpha_using_qemu
 477         /* Similarly, look for QEMU.  */
 478         alpha_using_qemu = strstr((const char *)hwrpb->ssn, "QEMU") != 0;
 479 #endif
 480
 481         /* If we are using SRM, we want to allow callbacks
 482            as early as possible, so do this NOW, and then
 483            they should work immediately thereafter.
 484         */
 485         kernel_end = callback_init(kernel_end);
 486
 487         /*
 488          * Locate the command line.
 489          */
 490         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
 491            boot flags depending on the boot mode, we need some shorthand.
 492            This should do for installation.  */
 493         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
 494                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
 495         } else {
 496                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
 497         }
 498         strcpy(boot_command_line, command_line);
 499         *cmdline_p = command_line;
 500
 501         /*
 502          * Process command-line arguments.
 503          */
 504         while ((p = strsep(&args, " \t")) != NULL) {
 505                 if (!*p) continue;
 506                 if (strncmp(p, "alpha_mv=", 9) == 0) {
 507                         vec = get_sysvec_byname(p+9);
 508                         continue;
 509                 }
 510                 if (strncmp(p, "cycle=", 6) == 0) {
 511                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
 512                         continue;
 513                 }
 514                 if (strncmp(p, "mem=", 4) == 0) {
 515                         mem_size_limit = get_mem_size_limit(p+4);
 516                         continue;
 517                 }
 518                 if (strncmp(p, "srmcons", 7) == 0) {
 519                         srmcons_output |= 1;
 520                         continue;
 521                 }
 522                 if (strncmp(p, "console=srm", 11) == 0) {
 523                         srmcons_output |= 2;
 524                         continue;
 525                 }
 526                 if (strncmp(p, "gartsize=", 9) == 0) {
 527                         alpha_agpgart_size =
 528                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
 529                         continue;
 530                 }
 531 #ifdef CONFIG_VERBOSE_MCHECK
 532                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
 533                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
 534                         continue;
 535                 }
 536 #endif
 537         }
 538
 539         /* Replace the command line, now that we've killed it with strsep.  */
 540         strcpy(command_line, boot_command_line);
 541
 542         /* If we want SRM console printk echoing early, do it now. */
 543         if (alpha_using_srm && srmcons_output) {
 544                 register_srm_console();
 545
 546                 /*
 547                  * If "console=srm" was specified, clear the srmcons_output
 548                  * flag now so that time.c won't unregister_srm_console
 549                  */
 550                 if (srmcons_output & 2)
 551                         srmcons_output = 0;
 552         }
 553
 554 #ifdef CONFIG_MAGIC_SYSRQ
 555         /* If we're using SRM, make sysrq-b halt back to the prom,
 556            not auto-reboot.  */
 557         if (alpha_using_srm) {
 558                 unregister_sysrq_key('b', __sysrq_reboot_op);
 559                 register_sysrq_key('b', &srm_sysrq_reboot_op);
 560         }
 561 #endif
 562
 563         /*
 564          * Identify and reconfigure for the current system.
 565          */
 566         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
 567
 568         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
 569                      cpu->type, &type_name, &var_name);
 570         if (*var_name == '0')
 571                 var_name = "";
 572
 573         if (!vec) {
 574                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
 575                                  cpu->type);
 576         }
 577
 578         if (!vec) {
 579                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
 580                       type_name, (*var_name ? " variation " : ""), var_name,
 581                       hwrpb->sys_type, hwrpb->sys_variation);
 582         }
 583         if (vec != &alpha_mv) {
 584                 alpha_mv = *vec;
 585         }
 586
 587         printk("Booting "
 588 #ifdef CONFIG_ALPHA_GENERIC
 589                "GENERIC "
 590 #endif
 591                "on %s%s%s using machine vector %s from %s\n",
 592                type_name, (*var_name ? " variation " : ""),
 593                var_name, alpha_mv.vector_name,
 594                (alpha_using_srm ? "SRM" : "MILO"));
 595
 596         printk("Major Options: "
 597 #ifdef CONFIG_SMP
 598                "SMP "
 599 #endif
 600 #ifdef CONFIG_ALPHA_EV56
 601                "EV56 "
 602 #endif
 603 #ifdef CONFIG_ALPHA_EV67
 604                "EV67 "
 605 #endif
 606 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
 607                "LEGACY_START "
 608 #endif
 609 #ifdef CONFIG_VERBOSE_MCHECK
 610                "VERBOSE_MCHECK "
 611 #endif
 612
 613 #ifdef CONFIG_DEBUG_SPINLOCK
 614                "DEBUG_SPINLOCK "
 615 #endif
 616 #ifdef CONFIG_MAGIC_SYSRQ
 617                "MAGIC_SYSRQ "
 618 #endif
 619                "\n");
 620
 621         printk("Command line: %s\n", command_line);
 622
 623         /*
 624          * Sync up the HAE.
 625          * Save the SRM's current value for restoration.
 626          */
 627         srm_hae = *alpha_mv.hae_register;
 628         __set_hae(alpha_mv.hae_cache);
 629
 630         /* Reset enable correctable error reports.  */
 631         wrmces(0x7);
 632
 633         /* Find our memory.  */
 634         setup_memory(kernel_end);
 635         memblock_set_bottom_up(true);
 636         sparse_init();
 637
 638         /* First guess at cpu cache sizes.  Do this before init_arch.  */
 639         determine_cpu_caches(cpu->type);
 640
 641         /* Initialize the machine.  Usually has to do with setting up
 642            DMA windows and the like.  */
 643         if (alpha_mv.init_arch)
 644                 alpha_mv.init_arch();
 645
 646         /* Reserve standard resources.  */
 647         reserve_std_resources();
 648
 649         /*
 650          * Give us a default console.  TGA users will see nothing until
 651          * chr_dev_init is called, rather late in the boot sequence.
 652          */
 653
 654 #ifdef CONFIG_VT
 655 #if defined(CONFIG_VGA_CONSOLE)
 656         conswitchp = &vga_con;
 657 #endif
 658 #endif
 659
 660         /* Default root filesystem to sda2.  */
 661         ROOT_DEV = Root_SDA2;
 662
 663 #ifdef CONFIG_EISA
 664         /* FIXME:  only set this when we actually have EISA in this box? */
 665         EISA_bus = 1;
 666 #endif
 667
 668         /*
 669          * Check ASN in HWRPB for validity, report if bad.
 670          * FIXME: how was this failing?  Should we trust it instead,
 671          * and copy the value into alpha_mv.max_asn?
 672          */
 673
 674         if (hwrpb->max_asn != MAX_ASN) {
 675                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
 676         }
 677
 678         /*
 679          * Identify the flock of penguins.
 680          */
 681
 682 #ifdef CONFIG_SMP
 683         setup_smp();
 684 #endif
 685         paging_init();
 686 }
 687
 688 static char sys_unknown[] = "Unknown";
 689 static char systype_names[][16] = {
 690         "0",
 691         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
 692         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
 693         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
 694         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
 695         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
 696         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
 697         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
 698 };
 699
 700 static char unofficial_names[][8] = {"100", "Ruffian"};
 701
 702 static char api_names[][16] = {"200", "Nautilus"};
 703
 704 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
 705 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
 706
 707 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
 708 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
 709
 710 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
 711 static int eb64p_indices[] = {0,0,1,2};
 712
 713 static char eb66_names[][8] = {"EB66", "EB66+"};
 714 static int eb66_indices[] = {0,0,1};
 715
 716 static char marvel_names[][16] = {
 717         "Marvel/EV7"
 718 };
 719 static int marvel_indices[] = { 0 };
 720
 721 static char rawhide_names[][16] = {
 722         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
 723 };
 724 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
 725
 726 static char titan_names[][16] = {
 727         "DEFAULT", "Privateer", "Falcon", "Granite"
 728 };
 729 static int titan_indices[] = {0,1,2,2,3};
 730
 731 static char tsunami_names[][16] = {
 732         "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
 733         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
 734         "Flying Clipper", "Shark"
 735 };
 736 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
 737
 738 static struct alpha_machine_vector * __init
 739 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
 740 {
 741         static struct alpha_machine_vector *systype_vecs[] __initdata =
 742         {
 743                 NULL,           /* 0 */
 744                 NULL,           /* ADU */
 745                 NULL,           /* Cobra */
 746                 NULL,           /* Ruby */
 747                 NULL,           /* Flamingo */
 748                 NULL,           /* Mannequin */
 749                 &jensen_mv,
 750                 NULL,           /* Pelican */
 751                 NULL,           /* Morgan */
 752                 NULL,           /* Sable -- see below.  */
 753                 NULL,           /* Medulla */
 754                 &noname_mv,
 755                 NULL,           /* Turbolaser */
 756                 &avanti_mv,
 757                 NULL,           /* Mustang */
 758                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
 759                 NULL,           /* Tradewind */
 760                 NULL,           /* Mikasa -- see below.  */
 761                 NULL,           /* EB64 */
 762                 NULL,           /* EB66 -- see variation.  */
 763                 NULL,           /* EB64+ -- see variation.  */
 764                 &alphabook1_mv,
 765                 &rawhide_mv,
 766                 NULL,           /* K2 */
 767                 &lynx_mv,       /* Lynx */
 768                 &xl_mv,
 769                 NULL,           /* EB164 -- see variation.  */
 770                 NULL,           /* Noritake -- see below.  */
 771                 NULL,           /* Cortex */
 772                 NULL,           /* 29 */
 773                 &miata_mv,
 774                 NULL,           /* XXM */
 775                 &takara_mv,
 776                 NULL,           /* Yukon */
 777                 NULL,           /* Tsunami -- see variation.  */
 778                 &wildfire_mv,   /* Wildfire */
 779                 NULL,           /* CUSCO */
 780                 &eiger_mv,      /* Eiger */
 781                 NULL,           /* Titan */
 782                 NULL,           /* Marvel */
 783         };
 784
 785         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
 786         {
 787                 NULL,           /* 100 */
 788                 &ruffian_mv,
 789         };
 790
 791         static struct alpha_machine_vector *api_vecs[] __initdata =
 792         {
 793                 NULL,           /* 200 */
 794                 &nautilus_mv,
 795         };
 796
 797         static struct alpha_machine_vector *alcor_vecs[] __initdata =
 798         {
 799                 &alcor_mv, &xlt_mv, &xlt_mv
 800         };
 801
 802         static struct alpha_machine_vector *eb164_vecs[] __initdata =
 803         {
 804                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
 805         };
 806
 807         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
 808         {
 809                 &eb64p_mv,
 810                 &cabriolet_mv,
 811                 &cabriolet_mv           /* AlphaPCI64 */
 812         };
 813
 814         static struct alpha_machine_vector *eb66_vecs[] __initdata =
 815         {
 816                 &eb66_mv,
 817                 &eb66p_mv
 818         };
 819
 820         static struct alpha_machine_vector *marvel_vecs[] __initdata =
 821         {
 822                 &marvel_ev7_mv,
 823         };
 824
 825         static struct alpha_machine_vector *titan_vecs[] __initdata =
 826         {
 827                 &titan_mv,              /* default   */
 828                 &privateer_mv,          /* privateer */
 829                 &titan_mv,              /* falcon    */
 830                 &privateer_mv,          /* granite   */
 831         };
 832
 833         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
 834         {
 835                 NULL,
 836                 &dp264_mv,              /* dp264 */
 837                 &dp264_mv,              /* warhol */
 838                 &dp264_mv,              /* windjammer */
 839                 &monet_mv,              /* monet */
 840                 &clipper_mv,            /* clipper */
 841                 &dp264_mv,              /* goldrush */
 842                 &webbrick_mv,           /* webbrick */
 843                 &dp264_mv,              /* catamaran */
 844                 NULL,                   /* brisbane? */
 845                 NULL,                   /* melbourne? */
 846                 NULL,                   /* flying clipper? */
 847                 &shark_mv,              /* shark */
 848         };
 849
 850         /* ??? Do we need to distinguish between Rawhides?  */
 851
 852         struct alpha_machine_vector *vec;
 853
 854         /* Search the system tables first... */
 855         vec = NULL;
 856         if (type < ARRAY_SIZE(systype_vecs)) {
 857                 vec = systype_vecs[type];
 858         } else if ((type > ST_API_BIAS) &&
 859                    (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
 860                 vec = api_vecs[type - ST_API_BIAS];
 861         } else if ((type > ST_UNOFFICIAL_BIAS) &&
 862                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
 863                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
 864         }
 865
 866         /* If we've not found one, try for a variation.  */
 867
 868         if (!vec) {
 869                 /* Member ID is a bit-field. */
 870                 unsigned long member = (variation >> 10) & 0x3f;
 871
 872                 cpu &= 0xffffffff; /* make it usable */
 873
 874                 switch (type) {
 875                 case ST_DEC_ALCOR:
 876                         if (member < ARRAY_SIZE(alcor_indices))
 877                                 vec = alcor_vecs[alcor_indices[member]];
 878                         break;
 879                 case ST_DEC_EB164:
 880                         if (member < ARRAY_SIZE(eb164_indices))
 881                                 vec = eb164_vecs[eb164_indices[member]];
 882                         /* PC164 may show as EB164 variation with EV56 CPU,
 883                            but, since no true EB164 had anything but EV5... */
 884                         if (vec == &eb164_mv && cpu == EV56_CPU)
 885                                 vec = &pc164_mv;
 886                         break;
 887                 case ST_DEC_EB64P:
 888                         if (member < ARRAY_SIZE(eb64p_indices))
 889                                 vec = eb64p_vecs[eb64p_indices[member]];
 890                         break;
 891                 case ST_DEC_EB66:
 892                         if (member < ARRAY_SIZE(eb66_indices))
 893                                 vec = eb66_vecs[eb66_indices[member]];
 894                         break;
 895                 case ST_DEC_MARVEL:
 896                         if (member < ARRAY_SIZE(marvel_indices))
 897                                 vec = marvel_vecs[marvel_indices[member]];
 898                         break;
 899                 case ST_DEC_TITAN:
 900                         vec = titan_vecs[0];    /* default */
 901                         if (member < ARRAY_SIZE(titan_indices))
 902                                 vec = titan_vecs[titan_indices[member]];
 903                         break;
 904                 case ST_DEC_TSUNAMI:
 905                         if (member < ARRAY_SIZE(tsunami_indices))
 906                                 vec = tsunami_vecs[tsunami_indices[member]];
 907                         break;
 908                 case ST_DEC_1000:
 909                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 910                                 vec = &mikasa_primo_mv;
 911                         else
 912                                 vec = &mikasa_mv;
 913                         break;
 914                 case ST_DEC_NORITAKE:
 915                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 916                                 vec = &noritake_primo_mv;
 917                         else
 918                                 vec = &noritake_mv;
 919                         break;
 920                 case ST_DEC_2100_A500:
 921                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 922                                 vec = &sable_gamma_mv;
 923                         else
 924                                 vec = &sable_mv;
 925                         break;
 926                 }
 927         }
 928         return vec;
 929 }
 930
 931 static struct alpha_machine_vector * __init
 932 get_sysvec_byname(const char *name)
 933 {
 934         static struct alpha_machine_vector *all_vecs[] __initdata =
 935         {
 936                 &alcor_mv,
 937                 &alphabook1_mv,
 938                 &avanti_mv,
 939                 &cabriolet_mv,
 940                 &clipper_mv,
 941                 &dp264_mv,
 942                 &eb164_mv,
 943                 &eb64p_mv,
 944                 &eb66_mv,
 945                 &eb66p_mv,
 946                 &eiger_mv,
 947                 &jensen_mv,
 948                 &lx164_mv,
 949                 &lynx_mv,
 950                 &miata_mv,
 951                 &mikasa_mv,
 952                 &mikasa_primo_mv,
 953                 &monet_mv,
 954                 &nautilus_mv,
 955                 &noname_mv,
 956                 &noritake_mv,
 957                 &noritake_primo_mv,
 958                 &p2k_mv,
 959                 &pc164_mv,
 960                 &privateer_mv,
 961                 &rawhide_mv,
 962                 &ruffian_mv,
 963                 &rx164_mv,
 964                 &sable_mv,
 965                 &sable_gamma_mv,
 966                 &shark_mv,
 967                 &sx164_mv,
 968                 &takara_mv,
 969                 &webbrick_mv,
 970                 &wildfire_mv,
 971                 &xl_mv,
 972                 &xlt_mv
 973         };
 974
 975         size_t i;
 976
 977         for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
 978                 struct alpha_machine_vector *mv = all_vecs[i];
 979                 if (strcasecmp(mv->vector_name, name) == 0)
 980                         return mv;
 981         }
 982         return NULL;
 983 }
 984
 985 static void
 986 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
 987              char **type_name, char **variation_name)
 988 {
 989         unsigned long member;
 990
 991         /* If not in the tables, make it UNKNOWN,
 992            else set type name to family */
 993         if (type < ARRAY_SIZE(systype_names)) {
 994                 *type_name = systype_names[type];
 995         } else if ((type > ST_API_BIAS) &&
 996                    (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
 997                 *type_name = api_names[type - ST_API_BIAS];
 998         } else if ((type > ST_UNOFFICIAL_BIAS) &&
 999                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
1000                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1001         } else {
1002                 *type_name = sys_unknown;
1003                 *variation_name = sys_unknown;
1004                 return;
1005         }
1006
1007         /* Set variation to "0"; if variation is zero, done.  */
1008         *variation_name = systype_names[0];
1009         if (variation == 0) {
1010                 return;
1011         }
1012
1013         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1014
1015         cpu &= 0xffffffff; /* make it usable */
1016
1017         switch (type) { /* select by family */
1018         default: /* default to variation "0" for now */
1019                 break;
1020         case ST_DEC_EB164:
1021                 if (member >= ARRAY_SIZE(eb164_indices))
1022                         break;
1023                 *variation_name = eb164_names[eb164_indices[member]];
1024                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1025                    so, since no true EB164 had anything but EV5... */
1026                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1027                         *variation_name = eb164_names[1]; /* make it PC164 */
1028                 break;
1029         case ST_DEC_ALCOR:
1030                 if (member < ARRAY_SIZE(alcor_indices))
1031                         *variation_name = alcor_names[alcor_indices[member]];
1032                 break;
1033         case ST_DEC_EB64P:
1034                 if (member < ARRAY_SIZE(eb64p_indices))
1035                         *variation_name = eb64p_names[eb64p_indices[member]];
1036                 break;
1037         case ST_DEC_EB66:
1038                 if (member < ARRAY_SIZE(eb66_indices))
1039                         *variation_name = eb66_names[eb66_indices[member]];
1040                 break;
1041         case ST_DEC_MARVEL:
1042                 if (member < ARRAY_SIZE(marvel_indices))
1043                         *variation_name = marvel_names[marvel_indices[member]];
1044                 break;
1045         case ST_DEC_RAWHIDE:
1046                 if (member < ARRAY_SIZE(rawhide_indices))
1047                         *variation_name = rawhide_names[rawhide_indices[member]];
1048                 break;
1049         case ST_DEC_TITAN:
1050                 *variation_name = titan_names[0];       /* default */
1051                 if (member < ARRAY_SIZE(titan_indices))
1052                         *variation_name = titan_names[titan_indices[member]];
1053                 break;
1054         case ST_DEC_TSUNAMI:
1055                 if (member < ARRAY_SIZE(tsunami_indices))
1056                         *variation_name = tsunami_names[tsunami_indices[member]];
1057                 break;
1058         }
1059 }
1060
1061 /*
1062  * A change was made to the HWRPB via an ECO and the following code
1063  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1064  * was not implemented in the console firmware.  If it's revision 5 or
1065  * greater we can get the name of the platform as an ASCII string from
1066  * the HWRPB.  That's what this function does.  It checks the revision
1067  * level and if the string is in the HWRPB it returns the address of
1068  * the string--a pointer to the name of the platform.
1069  *
1070  * Returns:
1071  *      - Pointer to a ASCII string if it's in the HWRPB
1072  *      - Pointer to a blank string if the data is not in the HWRPB.
1073  */
1074
1075 static char *
1076 platform_string(void)
1077 {
1078         struct dsr_struct *dsr;
1079         static char unk_system_string[] = "N/A";
1080
1081         /* Go to the console for the string pointer.
1082          * If the rpb_vers is not 5 or greater the rpb
1083          * is old and does not have this data in it.
1084          */
1085         if (hwrpb->revision < 5)
1086                 return (unk_system_string);
1087         else {
1088                 /* The Dynamic System Recognition struct
1089                  * has the system platform name starting
1090                  * after the character count of the string.
1091                  */
1092                 dsr =  ((struct dsr_struct *)
1093                         ((char *)hwrpb + hwrpb->dsr_offset));
1094                 return ((char *)dsr + (dsr->sysname_off +
1095                                        sizeof(long)));
1096         }
1097 }
1098
1099 static int
1100 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1101 {
1102         struct percpu_struct *cpu;
1103         unsigned long i;
1104         int count = 0;
1105
1106         for (i = 0; i < num; i++) {
1107                 cpu = (struct percpu_struct *)
1108                         ((char *)cpubase + i*hwrpb->processor_size);
1109                 if ((cpu->flags & 0x1cc) == 0x1cc)
1110                         count++;
1111         }
1112         return count;
1113 }
1114
1115 static void
1116 show_cache_size (struct seq_file *f, const char *which, int shape)
1117 {
1118         if (shape == -1)
1119                 seq_printf (f, "%s\t\t: n/a\n", which);
1120         else if (shape == 0)
1121                 seq_printf (f, "%s\t\t: unknown\n", which);
1122         else
1123                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1124                             which, shape >> 10, shape & 15,
1125                             1 << ((shape >> 4) & 15));
1126 }
1127
1128 static int
1129 show_cpuinfo(struct seq_file *f, void *slot)
1130 {
1131         extern struct unaligned_stat {
1132                 unsigned long count, va, pc;
1133         } unaligned[2];
1134
1135         static char cpu_names[][8] = {
1136                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1137                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1138                 "EV68CX", "EV7", "EV79", "EV69"
1139         };
1140
1141         struct percpu_struct *cpu = slot;
1142         unsigned int cpu_index;
1143         char *cpu_name;
1144         char *systype_name;
1145         char *sysvariation_name;
1146         int nr_processors;
1147         unsigned long timer_freq;
1148
1149         cpu_index = (unsigned) (cpu->type - 1);
1150         cpu_name = "Unknown";
1151         if (cpu_index < ARRAY_SIZE(cpu_names))
1152                 cpu_name = cpu_names[cpu_index];
1153
1154         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1155                      cpu->type, &systype_name, &sysvariation_name);
1156
1157         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1158
1159 #if CONFIG_HZ == 1024 || CONFIG_HZ == 1200
1160         timer_freq = (100UL * hwrpb->intr_freq) / 4096;
1161 #else
1162         timer_freq = 100UL * CONFIG_HZ;
1163 #endif
1164
1165         seq_printf(f, "cpu\t\t\t: Alpha\n"
1166                       "cpu model\t\t: %s\n"
1167                       "cpu variation\t\t: %ld\n"
1168                       "cpu revision\t\t: %ld\n"
1169                       "cpu serial number\t: %s\n"
1170                       "system type\t\t: %s\n"
1171                       "system variation\t: %s\n"
1172                       "system revision\t\t: %ld\n"
1173                       "system serial number\t: %s\n"
1174                       "cycle frequency [Hz]\t: %lu %s\n"
1175                       "timer frequency [Hz]\t: %lu.%02lu\n"
1176                       "page size [bytes]\t: %ld\n"
1177                       "phys. address bits\t: %ld\n"
1178                       "max. addr. space #\t: %ld\n"
1179                       "BogoMIPS\t\t: %lu.%02lu\n"
1180                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1181                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1182                       "platform string\t\t: %s\n"
1183                       "cpus detected\t\t: %d\n",
1184                        cpu_name, cpu->variation, cpu->revision,
1185                        (char*)cpu->serial_no,
1186                        systype_name, sysvariation_name, hwrpb->sys_revision,
1187                        (char*)hwrpb->ssn,
1188                        est_cycle_freq ? : hwrpb->cycle_freq,
1189                        est_cycle_freq ? "est." : "",
1190                        timer_freq / 100, timer_freq % 100,
1191                        hwrpb->pagesize,
1192                        hwrpb->pa_bits,
1193                        hwrpb->max_asn,
1194                        loops_per_jiffy / (500000/HZ),
1195                        (loops_per_jiffy / (5000/HZ)) % 100,
1196                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1197                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1198                        platform_string(), nr_processors);
1199
1200 #ifdef CONFIG_SMP
1201         seq_printf(f, "cpus active\t\t: %u\n"
1202                       "cpu active mask\t\t: %016lx\n",
1203                        num_online_cpus(), cpumask_bits(cpu_possible_mask)[0]);
1204 #endif
1205
1206         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1207         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1208         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1209         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1210
1211         return 0;
1212 }
1213
1214 static int __init
1215 read_mem_block(int *addr, int stride, int size)
1216 {
1217         long nloads = size / stride, cnt, tmp;
1218
1219         __asm__ __volatile__(
1220         "       rpcc    %0\n"
1221         "1:     ldl     %3,0(%2)\n"
1222         "       subq    %1,1,%1\n"
1223         /* Next two XORs introduce an explicit data dependency between
1224            consecutive loads in the loop, which will give us true load
1225            latency. */
1226         "       xor     %3,%2,%2\n"
1227         "       xor     %3,%2,%2\n"
1228         "       addq    %2,%4,%2\n"
1229         "       bne     %1,1b\n"
1230         "       rpcc    %3\n"
1231         "       subl    %3,%0,%0\n"
1232         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1233         : "r" (stride), "1" (nloads), "2" (addr));
1234
1235         return cnt / (size / stride);
1236 }
1237
1238 #define CSHAPE(totalsize, linesize, assoc) \
1239   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1240
1241 /* ??? EV5 supports up to 64M, but did the systems with more than
1242    16M of BCACHE ever exist? */
1243 #define MAX_BCACHE_SIZE 16*1024*1024
1244
1245 /* Note that the offchip caches are direct mapped on all Alphas. */
1246 static int __init
1247 external_cache_probe(int minsize, int width)
1248 {
1249         int cycles, prev_cycles = 1000000;
1250         int stride = 1 << width;
1251         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1252
1253         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1254                 maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT);
1255
1256         /* Get the first block cached. */
1257         read_mem_block(__va(0), stride, size);
1258
1259         while (size < maxsize) {
1260                 /* Get an average load latency in cycles. */
1261                 cycles = read_mem_block(__va(0), stride, size);
1262                 if (cycles > prev_cycles * 2) {
1263                         /* Fine, we exceed the cache. */
1264                         printk("%ldK Bcache detected; load hit latency %d "
1265                                "cycles, load miss latency %d cycles\n",
1266                                size >> 11, prev_cycles, cycles);
1267                         return CSHAPE(size >> 1, width, 1);
1268                 }
1269                 /* Try to get the next block cached. */
1270                 read_mem_block(__va(size), stride, size);
1271                 prev_cycles = cycles;
1272                 size <<= 1;
1273         }
1274         return -1;      /* No BCACHE found. */
1275 }
1276
1277 static void __init
1278 determine_cpu_caches (unsigned int cpu_type)
1279 {
1280         int L1I, L1D, L2, L3;
1281
1282         switch (cpu_type) {
1283         case EV4_CPU:
1284         case EV45_CPU:
1285           {
1286                 if (cpu_type == EV4_CPU)
1287                         L1I = CSHAPE(8*1024, 5, 1);
1288                 else
1289                         L1I = CSHAPE(16*1024, 5, 1);
1290                 L1D = L1I;
1291                 L3 = -1;
1292
1293                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1294                    shadow copy, and may be available from some versions
1295                    of the CSERVE PALcall.  If we can get it, then
1296
1297                         unsigned long biu_ctl, size;
1298                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1299                         L2 = CSHAPE (size, 5, 1);
1300
1301                    Unfortunately, we can't rely on that.
1302                 */
1303                 L2 = external_cache_probe(128*1024, 5);
1304                 break;
1305           }
1306
1307         case LCA4_CPU:
1308           {
1309                 unsigned long car, size;
1310
1311                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1312                 L3 = -1;
1313
1314                 car = *(vuip) phys_to_virt (0x120000078UL);
1315                 size = 64*1024 * (1 << ((car >> 5) & 7));
1316                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1317                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1318                 break;
1319           }
1320
1321         case EV5_CPU:
1322         case EV56_CPU:
1323           {
1324                 unsigned long sc_ctl, width;
1325
1326                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1327
1328                 /* Check the line size of the Scache.  */
1329                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1330                 width = sc_ctl & 0x1000 ? 6 : 5;
1331                 L2 = CSHAPE (96*1024, width, 3);
1332
1333                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1334                    has a shadow copy, and may be available from some versions
1335                    of the CSERVE PALcall.  If we can get it, then
1336
1337                         unsigned long bc_control, bc_config, size;
1338                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1339                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1340
1341                    Unfortunately, we can't rely on that.
1342                 */
1343                 L3 = external_cache_probe(1024*1024, width);
1344                 break;
1345           }
1346
1347         case PCA56_CPU:
1348         case PCA57_CPU:
1349           {
1350                 if (cpu_type == PCA56_CPU) {
1351                         L1I = CSHAPE(16*1024, 6, 1);
1352                         L1D = CSHAPE(8*1024, 5, 1);
1353                 } else {
1354                         L1I = CSHAPE(32*1024, 6, 2);
1355                         L1D = CSHAPE(16*1024, 5, 1);
1356                 }
1357                 L3 = -1;
1358
1359 #if 0
1360                 unsigned long cbox_config, size;
1361
1362                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1363                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1364
1365                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1366 #else
1367                 L2 = external_cache_probe(512*1024, 6);
1368 #endif
1369                 break;
1370           }
1371
1372         case EV6_CPU:
1373         case EV67_CPU:
1374         case EV68CB_CPU:
1375         case EV68AL_CPU:
1376         case EV68CX_CPU:
1377         case EV69_CPU:
1378                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1379                 L2 = external_cache_probe(1024*1024, 6);
1380                 L3 = -1;
1381                 break;
1382
1383         case EV7_CPU:
1384         case EV79_CPU:
1385                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1386                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1387                 L3 = -1;
1388                 break;
1389
1390         default:
1391                 /* Nothing known about this cpu type.  */
1392                 L1I = L1D = L2 = L3 = 0;
1393                 break;
1394         }
1395
1396         alpha_l1i_cacheshape = L1I;
1397         alpha_l1d_cacheshape = L1D;
1398         alpha_l2_cacheshape = L2;
1399         alpha_l3_cacheshape = L3;
1400 }
1401
1402 /*
1403  * We show only CPU #0 info.
1404  */
1405 static void *
1406 c_start(struct seq_file *f, loff_t *pos)
1407 {
1408         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1409 }
1410
1411 static void *
1412 c_next(struct seq_file *f, void *v, loff_t *pos)
1413 {
1414         (*pos)++;
1415         return NULL;
1416 }
1417
1418 static void
1419 c_stop(struct seq_file *f, void *v)
1420 {
1421 }
1422
1423 const struct seq_operations cpuinfo_op = {
1424         .start  = c_start,
1425         .next   = c_next,
1426         .stop   = c_stop,
1427         .show   = show_cpuinfo,
1428 };
1429
1430
1431 static int
1432 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1433 {
1434 #if 1
1435         /* FIXME FIXME FIXME */
1436         /* If we are using SRM and serial console, just hard halt here. */
1437         if (alpha_using_srm && srmcons_output)
1438                 __halt();
1439 #endif
1440         return NOTIFY_DONE;
1441 }
1442
1443 static __init int add_pcspkr(void)
1444 {
1445         struct platform_device *pd;
1446         int ret;
1447
1448         pd = platform_device_alloc("pcspkr", -1);
1449         if (!pd)
1450                 return -ENOMEM;
1451
1452         ret = platform_device_add(pd);
1453         if (ret)
1454                 platform_device_put(pd);
1455
1456         return ret;
1457 }
1458 device_initcall(add_pcspkr);