arch/alpha/kernel/setup.c

   1 /*
   2  *  linux/arch/alpha/kernel/setup.c
   3  *
   4  *  Copyright (C) 1995  Linus Torvalds
   5  */
   6
   7 /* 2.3.x bootmem, 1999 Andrea Arcangeli <andrea@suse.de> */
   8
   9 /*
  10  * Bootup setup stuff.
  11  */
  12
  13 #include <linux/sched.h>
  14 #include <linux/kernel.h>
  15 #include <linux/mm.h>
  16 #include <linux/stddef.h>
  17 #include <linux/unistd.h>
  18 #include <linux/ptrace.h>
  19 #include <linux/slab.h>
  20 #include <linux/user.h>
  21 #include <linux/a.out.h>
  22 #include <linux/tty.h>
  23 #include <linux/delay.h>
  24 #include <linux/config.h>       /* CONFIG_ALPHA_LCA etc */
  25 #include <linux/mc146818rtc.h>
  26 #include <linux/console.h>
  27 #include <linux/cpu.h>
  28 #include <linux/errno.h>
  29 #include <linux/init.h>
  30 #include <linux/string.h>
  31 #include <linux/ioport.h>
  32 #include <linux/bootmem.h>
  33 #include <linux/pci.h>
  34 #include <linux/seq_file.h>
  35 #include <linux/root_dev.h>
  36 #include <linux/initrd.h>
  37 #include <linux/eisa.h>
  38 #ifdef CONFIG_MAGIC_SYSRQ
  39 #include <linux/sysrq.h>
  40 #include <linux/reboot.h>
  41 #endif
  42 #include <linux/notifier.h>
  43 #include <asm/setup.h>
  44 #include <asm/io.h>
  45
  46 extern struct notifier_block *panic_notifier_list;
  47 static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
  48 static struct notifier_block alpha_panic_block = {
  49         alpha_panic_event,
  50         NULL,
  51         INT_MAX /* try to do it first */
  52 };
  53
  54 #include <asm/uaccess.h>
  55 #include <asm/pgtable.h>
  56 #include <asm/system.h>
  57 #include <asm/hwrpb.h>
  58 #include <asm/dma.h>
  59 #include <asm/io.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 unsigned long srm_hae;
  69
  70 int alpha_l1i_cacheshape;
  71 int alpha_l1d_cacheshape;
  72 int alpha_l2_cacheshape;
  73 int alpha_l3_cacheshape;
  74
  75 #ifdef CONFIG_VERBOSE_MCHECK
  76 /* 0=minimum, 1=verbose, 2=all */
  77 /* These can be overridden via the command line, ie "verbose_mcheck=2") */
  78 unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
  79 #endif
  80
  81 /* Which processor we booted from.  */
  82 int boot_cpuid;
  83
  84 /*
  85  * Using SRM callbacks for initial console output. This works from
  86  * setup_arch() time through the end of time_init(), as those places
  87  * are under our (Alpha) control.
  88
  89  * "srmcons" specified in the boot command arguments allows us to
  90  * see kernel messages during the period of time before the true
  91  * console device is "registered" during console_init().
  92  * As of this version (2.5.59), console_init() will call
  93  * disable_early_printk() as the last action before initializing
  94  * the console drivers. That's the last possible time srmcons can be
  95  * unregistered without interfering with console behavior.
  96  *
  97  * By default, OFF; set it with a bootcommand arg of "srmcons" or
  98  * "console=srm". The meaning of these two args is:
  99  *     "srmcons"     - early callback prints
 100  *     "console=srm" - full callback based console, including early prints
 101  */
 102 int srmcons_output = 0;
 103
 104 /* Enforce a memory size limit; useful for testing. By default, none. */
 105 unsigned long mem_size_limit = 0;
 106
 107 /* Set AGP GART window size (0 means disabled). */
 108 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
 109
 110 #ifdef CONFIG_ALPHA_GENERIC
 111 struct alpha_machine_vector alpha_mv;
 112 int alpha_using_srm;
 113 #endif
 114
 115 #define N(a) (sizeof(a)/sizeof(a[0]))
 116
 117 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
 118                                                unsigned long);
 119 static struct alpha_machine_vector *get_sysvec_byname(const char *);
 120 static void get_sysnames(unsigned long, unsigned long, unsigned long,
 121                          char **, char **);
 122 static void determine_cpu_caches (unsigned int);
 123
 124 static char command_line[COMMAND_LINE_SIZE];
 125
 126 /*
 127  * The format of "screen_info" is strange, and due to early
 128  * i386-setup code. This is just enough to make the console
 129  * code think we're on a VGA color display.
 130  */
 131
 132 struct screen_info screen_info = {
 133         .orig_x = 0,
 134         .orig_y = 25,
 135         .orig_video_cols = 80,
 136         .orig_video_lines = 25,
 137         .orig_video_isVGA = 1,
 138         .orig_video_points = 16
 139 };
 140
 141 /*
 142  * The direct map I/O window, if any.  This should be the same
 143  * for all busses, since it's used by virt_to_bus.
 144  */
 145
 146 unsigned long __direct_map_base;
 147 unsigned long __direct_map_size;
 148
 149 /*
 150  * Declare all of the machine vectors.
 151  */
 152
 153 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either
 154    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
 155    to the assembler.  */
 156
 157 #define WEAK(X) \
 158         extern struct alpha_machine_vector X; \
 159         asm(".weak "#X)
 160
 161 WEAK(alcor_mv);
 162 WEAK(alphabook1_mv);
 163 WEAK(avanti_mv);
 164 WEAK(cabriolet_mv);
 165 WEAK(clipper_mv);
 166 WEAK(dp264_mv);
 167 WEAK(eb164_mv);
 168 WEAK(eb64p_mv);
 169 WEAK(eb66_mv);
 170 WEAK(eb66p_mv);
 171 WEAK(eiger_mv);
 172 WEAK(jensen_mv);
 173 WEAK(lx164_mv);
 174 WEAK(lynx_mv);
 175 WEAK(marvel_ev7_mv);
 176 WEAK(miata_mv);
 177 WEAK(mikasa_mv);
 178 WEAK(mikasa_primo_mv);
 179 WEAK(monet_mv);
 180 WEAK(nautilus_mv);
 181 WEAK(noname_mv);
 182 WEAK(noritake_mv);
 183 WEAK(noritake_primo_mv);
 184 WEAK(p2k_mv);
 185 WEAK(pc164_mv);
 186 WEAK(privateer_mv);
 187 WEAK(rawhide_mv);
 188 WEAK(ruffian_mv);
 189 WEAK(rx164_mv);
 190 WEAK(sable_mv);
 191 WEAK(sable_gamma_mv);
 192 WEAK(shark_mv);
 193 WEAK(sx164_mv);
 194 WEAK(takara_mv);
 195 WEAK(titan_mv);
 196 WEAK(webbrick_mv);
 197 WEAK(wildfire_mv);
 198 WEAK(xl_mv);
 199 WEAK(xlt_mv);
 200
 201 #undef WEAK
 202
 203 /*
 204  * I/O resources inherited from PeeCees.  Except for perhaps the
 205  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
 206  *
 207  * ??? If this becomes less standard, move the struct out into the
 208  * machine vector.
 209  */
 210
 211 static void __init
 212 reserve_std_resources(void)
 213 {
 214         static struct resource standard_io_resources[] = {
 215                 { .name = "rtc", .start = -1, .end = -1 },
 216                 { .name = "dma1", .start = 0x00, .end = 0x1f },
 217                 { .name = "pic1", .start = 0x20, .end = 0x3f },
 218                 { .name = "timer", .start = 0x40, .end = 0x5f },
 219                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
 220                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
 221                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
 222                 { .name = "dma2", .start = 0xc0, .end = 0xdf },
 223         };
 224
 225         struct resource *io = &ioport_resource;
 226         size_t i;
 227
 228         if (hose_head) {
 229                 struct pci_controller *hose;
 230                 for (hose = hose_head; hose; hose = hose->next)
 231                         if (hose->index == 0) {
 232                                 io = hose->io_space;
 233                                 break;
 234                         }
 235         }
 236
 237         /* Fix up for the Jensen's queer RTC placement.  */
 238         standard_io_resources[0].start = RTC_PORT(0);
 239         standard_io_resources[0].end = RTC_PORT(0) + 0x10;
 240
 241         for (i = 0; i < N(standard_io_resources); ++i)
 242                 request_resource(io, standard_io_resources+i);
 243 }
 244
 245 #define PFN_UP(x)       (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
 246 #define PFN_DOWN(x)     ((x) >> PAGE_SHIFT)
 247 #define PFN_PHYS(x)     ((x) << PAGE_SHIFT)
 248 #define PFN_MAX         PFN_DOWN(0x80000000)
 249 #define for_each_mem_cluster(memdesc, cluster, i)               \
 250         for ((cluster) = (memdesc)->cluster, (i) = 0;           \
 251              (i) < (memdesc)->numclusters; (i)++, (cluster)++)
 252
 253 static unsigned long __init
 254 get_mem_size_limit(char *s)
 255 {
 256         unsigned long end = 0;
 257         char *from = s;
 258
 259         end = simple_strtoul(from, &from, 0);
 260         if ( *from == 'K' || *from == 'k' ) {
 261                 end = end << 10;
 262                 from++;
 263         } else if ( *from == 'M' || *from == 'm' ) {
 264                 end = end << 20;
 265                 from++;
 266         } else if ( *from == 'G' || *from == 'g' ) {
 267                 end = end << 30;
 268                 from++;
 269         }
 270         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
 271 }
 272
 273 #ifdef CONFIG_BLK_DEV_INITRD
 274 void * __init
 275 move_initrd(unsigned long mem_limit)
 276 {
 277         void *start;
 278         unsigned long size;
 279
 280         size = initrd_end - initrd_start;
 281         start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
 282         if (!start || __pa(start) + size > mem_limit) {
 283                 initrd_start = initrd_end = 0;
 284                 return NULL;
 285         }
 286         memmove(start, (void *)initrd_start, size);
 287         initrd_start = (unsigned long)start;
 288         initrd_end = initrd_start + size;
 289         printk("initrd moved to %p\n", start);
 290         return start;
 291 }
 292 #endif
 293
 294 #ifndef CONFIG_DISCONTIGMEM
 295 static void __init
 296 setup_memory(void *kernel_end)
 297 {
 298         struct memclust_struct * cluster;
 299         struct memdesc_struct * memdesc;
 300         unsigned long start_kernel_pfn, end_kernel_pfn;
 301         unsigned long bootmap_size, bootmap_pages, bootmap_start;
 302         unsigned long start, end;
 303         unsigned long i;
 304
 305         /* Find free clusters, and init and free the bootmem accordingly.  */
 306         memdesc = (struct memdesc_struct *)
 307           (hwrpb->mddt_offset + (unsigned long) hwrpb);
 308
 309         for_each_mem_cluster(memdesc, cluster, i) {
 310                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
 311                        i, cluster->usage, cluster->start_pfn,
 312                        cluster->start_pfn + cluster->numpages);
 313
 314                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
 315                    non-volatile memory -- we might want to mark
 316                    this for later.  */
 317                 if (cluster->usage & 3)
 318                         continue;
 319
 320                 end = cluster->start_pfn + cluster->numpages;
 321                 if (end > max_low_pfn)
 322                         max_low_pfn = end;
 323         }
 324
 325         /*
 326          * Except for the NUMA systems (wildfire, marvel) all of the
 327          * Alpha systems we run on support 32GB of memory or less.
 328          * Since the NUMA systems introduce large holes in memory addressing,
 329          * we can get into a situation where there is not enough contiguous
 330          * memory for the memory map.
 331          *
 332          * Limit memory to the first 32GB to limit the NUMA systems to
 333          * memory on their first node (wildfire) or 2 (marvel) to avoid
 334          * not being able to produce the memory map. In order to access
 335          * all of the memory on the NUMA systems, build with discontiguous
 336          * memory support.
 337          *
 338          * If the user specified a memory limit, let that memory limit stand.
 339          */
 340         if (!mem_size_limit)
 341                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
 342
 343         if (mem_size_limit && max_low_pfn >= mem_size_limit)
 344         {
 345                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
 346                        mem_size_limit << (PAGE_SHIFT - 10),
 347                        max_low_pfn    << (PAGE_SHIFT - 10));
 348                 max_low_pfn = mem_size_limit;
 349         }
 350
 351         /* Find the bounds of kernel memory.  */
 352         start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
 353         end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
 354         bootmap_start = -1;
 355
 356  try_again:
 357         if (max_low_pfn <= end_kernel_pfn)
 358                 panic("not enough memory to boot");
 359
 360         /* We need to know how many physically contiguous pages
 361            we'll need for the bootmap.  */
 362         bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
 363
 364         /* Now find a good region where to allocate the bootmap.  */
 365         for_each_mem_cluster(memdesc, cluster, i) {
 366                 if (cluster->usage & 3)
 367                         continue;
 368
 369                 start = cluster->start_pfn;
 370                 end = start + cluster->numpages;
 371                 if (start >= max_low_pfn)
 372                         continue;
 373                 if (end > max_low_pfn)
 374                         end = max_low_pfn;
 375                 if (start < start_kernel_pfn) {
 376                         if (end > end_kernel_pfn
 377                             && end - end_kernel_pfn >= bootmap_pages) {
 378                                 bootmap_start = end_kernel_pfn;
 379                                 break;
 380                         } else if (end > start_kernel_pfn)
 381                                 end = start_kernel_pfn;
 382                 } else if (start < end_kernel_pfn)
 383                         start = end_kernel_pfn;
 384                 if (end - start >= bootmap_pages) {
 385                         bootmap_start = start;
 386                         break;
 387                 }
 388         }
 389
 390         if (bootmap_start == ~0UL) {
 391                 max_low_pfn >>= 1;
 392                 goto try_again;
 393         }
 394
 395         /* Allocate the bootmap and mark the whole MM as reserved.  */
 396         bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
 397
 398         /* Mark the free regions.  */
 399         for_each_mem_cluster(memdesc, cluster, i) {
 400                 if (cluster->usage & 3)
 401                         continue;
 402
 403                 start = cluster->start_pfn;
 404                 end = cluster->start_pfn + cluster->numpages;
 405                 if (start >= max_low_pfn)
 406                         continue;
 407                 if (end > max_low_pfn)
 408                         end = max_low_pfn;
 409                 if (start < start_kernel_pfn) {
 410                         if (end > end_kernel_pfn) {
 411                                 free_bootmem(PFN_PHYS(start),
 412                                              (PFN_PHYS(start_kernel_pfn)
 413                                               - PFN_PHYS(start)));
 414                                 printk("freeing pages %ld:%ld\n",
 415                                        start, start_kernel_pfn);
 416                                 start = end_kernel_pfn;
 417                         } else if (end > start_kernel_pfn)
 418                                 end = start_kernel_pfn;
 419                 } else if (start < end_kernel_pfn)
 420                         start = end_kernel_pfn;
 421                 if (start >= end)
 422                         continue;
 423
 424                 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
 425                 printk("freeing pages %ld:%ld\n", start, end);
 426         }
 427
 428         /* Reserve the bootmap memory.  */
 429         reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size);
 430         printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
 431
 432 #ifdef CONFIG_BLK_DEV_INITRD
 433         initrd_start = INITRD_START;
 434         if (initrd_start) {
 435                 initrd_end = initrd_start+INITRD_SIZE;
 436                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
 437                        (void *) initrd_start, INITRD_SIZE);
 438
 439                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
 440                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
 441                                 printk("initrd extends beyond end of memory "
 442                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
 443                                        initrd_end,
 444                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
 445                 } else {
 446                         reserve_bootmem(virt_to_phys((void *)initrd_start),
 447                                         INITRD_SIZE);
 448                 }
 449         }
 450 #endif /* CONFIG_BLK_DEV_INITRD */
 451 }
 452 #else
 453 extern void setup_memory(void *);
 454 #endif /* !CONFIG_DISCONTIGMEM */
 455
 456 int __init
 457 page_is_ram(unsigned long pfn)
 458 {
 459         struct memclust_struct * cluster;
 460         struct memdesc_struct * memdesc;
 461         unsigned long i;
 462
 463         memdesc = (struct memdesc_struct *)
 464                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
 465         for_each_mem_cluster(memdesc, cluster, i)
 466         {
 467                 if (pfn >= cluster->start_pfn  &&
 468                     pfn < cluster->start_pfn + cluster->numpages) {
 469                         return (cluster->usage & 3) ? 0 : 1;
 470                 }
 471         }
 472
 473         return 0;
 474 }
 475
 476 #undef PFN_UP
 477 #undef PFN_DOWN
 478 #undef PFN_PHYS
 479 #undef PFN_MAX
 480
 481 static int __init
 482 register_cpus(void)
 483 {
 484         int i;
 485
 486         for_each_possible_cpu(i) {
 487                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
 488                 if (!p)
 489                         return -ENOMEM;
 490                 register_cpu(p, i, NULL);
 491         }
 492         return 0;
 493 }
 494
 495 arch_initcall(register_cpus);
 496
 497 void __init
 498 setup_arch(char **cmdline_p)
 499 {
 500         extern char _end[];
 501
 502         struct alpha_machine_vector *vec = NULL;
 503         struct percpu_struct *cpu;
 504         char *type_name, *var_name, *p;
 505         void *kernel_end = _end; /* end of kernel */
 506         char *args = command_line;
 507
 508         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
 509         boot_cpuid = hard_smp_processor_id();
 510
 511         /*
 512          * Pre-process the system type to make sure it will be valid.
 513          *
 514          * This may restore real CABRIO and EB66+ family names, ie
 515          * EB64+ and EB66.
 516          *
 517          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
 518          * and AS1200 (DIGITAL Server 5000 series) have the type as
 519          * the negative of the real one.
 520          */
 521         if ((long)hwrpb->sys_type < 0) {
 522                 hwrpb->sys_type = -((long)hwrpb->sys_type);
 523                 hwrpb_update_checksum(hwrpb);
 524         }
 525
 526         /* Register a call for panic conditions. */
 527         notifier_chain_register(&panic_notifier_list, &alpha_panic_block);
 528
 529 #ifdef CONFIG_ALPHA_GENERIC
 530         /* Assume that we've booted from SRM if we haven't booted from MILO.
 531            Detect the later by looking for "MILO" in the system serial nr.  */
 532         alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
 533 #endif
 534
 535         /* If we are using SRM, we want to allow callbacks
 536            as early as possible, so do this NOW, and then
 537            they should work immediately thereafter.
 538         */
 539         kernel_end = callback_init(kernel_end);
 540
 541         /*
 542          * Locate the command line.
 543          */
 544         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
 545            boot flags depending on the boot mode, we need some shorthand.
 546            This should do for installation.  */
 547         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
 548                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
 549         } else {
 550                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
 551         }
 552         strcpy(saved_command_line, command_line);
 553         *cmdline_p = command_line;
 554
 555         /*
 556          * Process command-line arguments.
 557          */
 558         while ((p = strsep(&args, " \t")) != NULL) {
 559                 if (!*p) continue;
 560                 if (strncmp(p, "alpha_mv=", 9) == 0) {
 561                         vec = get_sysvec_byname(p+9);
 562                         continue;
 563                 }
 564                 if (strncmp(p, "cycle=", 6) == 0) {
 565                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
 566                         continue;
 567                 }
 568                 if (strncmp(p, "mem=", 4) == 0) {
 569                         mem_size_limit = get_mem_size_limit(p+4);
 570                         continue;
 571                 }
 572                 if (strncmp(p, "srmcons", 7) == 0) {
 573                         srmcons_output |= 1;
 574                         continue;
 575                 }
 576                 if (strncmp(p, "console=srm", 11) == 0) {
 577                         srmcons_output |= 2;
 578                         continue;
 579                 }
 580                 if (strncmp(p, "gartsize=", 9) == 0) {
 581                         alpha_agpgart_size =
 582                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
 583                         continue;
 584                 }
 585 #ifdef CONFIG_VERBOSE_MCHECK
 586                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
 587                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
 588                         continue;
 589                 }
 590 #endif
 591         }
 592
 593         /* Replace the command line, now that we've killed it with strsep.  */
 594         strcpy(command_line, saved_command_line);
 595
 596         /* If we want SRM console printk echoing early, do it now. */
 597         if (alpha_using_srm && srmcons_output) {
 598                 register_srm_console();
 599
 600                 /*
 601                  * If "console=srm" was specified, clear the srmcons_output
 602                  * flag now so that time.c won't unregister_srm_console
 603                  */
 604                 if (srmcons_output & 2)
 605                         srmcons_output = 0;
 606         }
 607
 608 #ifdef CONFIG_MAGIC_SYSRQ
 609         /* If we're using SRM, make sysrq-b halt back to the prom,
 610            not auto-reboot.  */
 611         if (alpha_using_srm) {
 612                 struct sysrq_key_op *op = __sysrq_get_key_op('b');
 613                 op->handler = (void *) machine_halt;
 614         }
 615 #endif
 616
 617         /*
 618          * Identify and reconfigure for the current system.
 619          */
 620         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
 621
 622         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
 623                      cpu->type, &type_name, &var_name);
 624         if (*var_name == '0')
 625                 var_name = "";
 626
 627         if (!vec) {
 628                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
 629                                  cpu->type);
 630         }
 631
 632         if (!vec) {
 633                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
 634                       type_name, (*var_name ? " variation " : ""), var_name,
 635                       hwrpb->sys_type, hwrpb->sys_variation);
 636         }
 637         if (vec != &alpha_mv) {
 638                 alpha_mv = *vec;
 639         }
 640
 641         printk("Booting "
 642 #ifdef CONFIG_ALPHA_GENERIC
 643                "GENERIC "
 644 #endif
 645                "on %s%s%s using machine vector %s from %s\n",
 646                type_name, (*var_name ? " variation " : ""),
 647                var_name, alpha_mv.vector_name,
 648                (alpha_using_srm ? "SRM" : "MILO"));
 649
 650         printk("Major Options: "
 651 #ifdef CONFIG_SMP
 652                "SMP "
 653 #endif
 654 #ifdef CONFIG_ALPHA_EV56
 655                "EV56 "
 656 #endif
 657 #ifdef CONFIG_ALPHA_EV67
 658                "EV67 "
 659 #endif
 660 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
 661                "LEGACY_START "
 662 #endif
 663 #ifdef CONFIG_VERBOSE_MCHECK
 664                "VERBOSE_MCHECK "
 665 #endif
 666
 667 #ifdef CONFIG_DISCONTIGMEM
 668                "DISCONTIGMEM "
 669 #ifdef CONFIG_NUMA
 670                "NUMA "
 671 #endif
 672 #endif
 673
 674 #ifdef CONFIG_DEBUG_SPINLOCK
 675                "DEBUG_SPINLOCK "
 676 #endif
 677 #ifdef CONFIG_MAGIC_SYSRQ
 678                "MAGIC_SYSRQ "
 679 #endif
 680                "\n");
 681
 682         printk("Command line: %s\n", command_line);
 683
 684         /*
 685          * Sync up the HAE.
 686          * Save the SRM's current value for restoration.
 687          */
 688         srm_hae = *alpha_mv.hae_register;
 689         __set_hae(alpha_mv.hae_cache);
 690
 691         /* Reset enable correctable error reports.  */
 692         wrmces(0x7);
 693
 694         /* Find our memory.  */
 695         setup_memory(kernel_end);
 696
 697         /* First guess at cpu cache sizes.  Do this before init_arch.  */
 698         determine_cpu_caches(cpu->type);
 699
 700         /* Initialize the machine.  Usually has to do with setting up
 701            DMA windows and the like.  */
 702         if (alpha_mv.init_arch)
 703                 alpha_mv.init_arch();
 704
 705         /* Reserve standard resources.  */
 706         reserve_std_resources();
 707
 708         /*
 709          * Give us a default console.  TGA users will see nothing until
 710          * chr_dev_init is called, rather late in the boot sequence.
 711          */
 712
 713 #ifdef CONFIG_VT
 714 #if defined(CONFIG_VGA_CONSOLE)
 715         conswitchp = &vga_con;
 716 #elif defined(CONFIG_DUMMY_CONSOLE)
 717         conswitchp = &dummy_con;
 718 #endif
 719 #endif
 720
 721         /* Default root filesystem to sda2.  */
 722         ROOT_DEV = Root_SDA2;
 723
 724 #ifdef CONFIG_EISA
 725         /* FIXME:  only set this when we actually have EISA in this box? */
 726         EISA_bus = 1;
 727 #endif
 728
 729         /*
 730          * Check ASN in HWRPB for validity, report if bad.
 731          * FIXME: how was this failing?  Should we trust it instead,
 732          * and copy the value into alpha_mv.max_asn?
 733          */
 734
 735         if (hwrpb->max_asn != MAX_ASN) {
 736                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
 737         }
 738
 739         /*
 740          * Identify the flock of penguins.
 741          */
 742
 743 #ifdef CONFIG_SMP
 744         setup_smp();
 745 #endif
 746         paging_init();
 747 }
 748
 749 void __init
 750 disable_early_printk(void)
 751 {
 752         if (alpha_using_srm && srmcons_output) {
 753                 unregister_srm_console();
 754                 srmcons_output = 0;
 755         }
 756 }
 757
 758 static char sys_unknown[] = "Unknown";
 759 static char systype_names[][16] = {
 760         "0",
 761         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
 762         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
 763         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
 764         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
 765         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
 766         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
 767         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
 768 };
 769
 770 static char unofficial_names[][8] = {"100", "Ruffian"};
 771
 772 static char api_names[][16] = {"200", "Nautilus"};
 773
 774 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
 775 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
 776
 777 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
 778 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
 779
 780 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
 781 static int eb64p_indices[] = {0,0,1,2};
 782
 783 static char eb66_names[][8] = {"EB66", "EB66+"};
 784 static int eb66_indices[] = {0,0,1};
 785
 786 static char marvel_names[][16] = {
 787         "Marvel/EV7"
 788 };
 789 static int marvel_indices[] = { 0 };
 790
 791 static char rawhide_names[][16] = {
 792         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
 793 };
 794 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
 795
 796 static char titan_names[][16] = {
 797         "DEFAULT", "Privateer", "Falcon", "Granite"
 798 };
 799 static int titan_indices[] = {0,1,2,2,3};
 800
 801 static char tsunami_names[][16] = {
 802         "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
 803         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
 804         "Flying Clipper", "Shark"
 805 };
 806 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
 807
 808 static struct alpha_machine_vector * __init
 809 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
 810 {
 811         static struct alpha_machine_vector *systype_vecs[] __initdata =
 812         {
 813                 NULL,           /* 0 */
 814                 NULL,           /* ADU */
 815                 NULL,           /* Cobra */
 816                 NULL,           /* Ruby */
 817                 NULL,           /* Flamingo */
 818                 NULL,           /* Mannequin */
 819                 &jensen_mv,
 820                 NULL,           /* Pelican */
 821                 NULL,           /* Morgan */
 822                 NULL,           /* Sable -- see below.  */
 823                 NULL,           /* Medulla */
 824                 &noname_mv,
 825                 NULL,           /* Turbolaser */
 826                 &avanti_mv,
 827                 NULL,           /* Mustang */
 828                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
 829                 NULL,           /* Tradewind */
 830                 NULL,           /* Mikasa -- see below.  */
 831                 NULL,           /* EB64 */
 832                 NULL,           /* EB66 -- see variation.  */
 833                 NULL,           /* EB64+ -- see variation.  */
 834                 &alphabook1_mv,
 835                 &rawhide_mv,
 836                 NULL,           /* K2 */
 837                 &lynx_mv,       /* Lynx */
 838                 &xl_mv,
 839                 NULL,           /* EB164 -- see variation.  */
 840                 NULL,           /* Noritake -- see below.  */
 841                 NULL,           /* Cortex */
 842                 NULL,           /* 29 */
 843                 &miata_mv,
 844                 NULL,           /* XXM */
 845                 &takara_mv,
 846                 NULL,           /* Yukon */
 847                 NULL,           /* Tsunami -- see variation.  */
 848                 &wildfire_mv,   /* Wildfire */
 849                 NULL,           /* CUSCO */
 850                 &eiger_mv,      /* Eiger */
 851                 NULL,           /* Titan */
 852                 NULL,           /* Marvel */
 853         };
 854
 855         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
 856         {
 857                 NULL,           /* 100 */
 858                 &ruffian_mv,
 859         };
 860
 861         static struct alpha_machine_vector *api_vecs[] __initdata =
 862         {
 863                 NULL,           /* 200 */
 864                 &nautilus_mv,
 865         };
 866
 867         static struct alpha_machine_vector *alcor_vecs[] __initdata =
 868         {
 869                 &alcor_mv, &xlt_mv, &xlt_mv
 870         };
 871
 872         static struct alpha_machine_vector *eb164_vecs[] __initdata =
 873         {
 874                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
 875         };
 876
 877         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
 878         {
 879                 &eb64p_mv,
 880                 &cabriolet_mv,
 881                 &cabriolet_mv           /* AlphaPCI64 */
 882         };
 883
 884         static struct alpha_machine_vector *eb66_vecs[] __initdata =
 885         {
 886                 &eb66_mv,
 887                 &eb66p_mv
 888         };
 889
 890         static struct alpha_machine_vector *marvel_vecs[] __initdata =
 891         {
 892                 &marvel_ev7_mv,
 893         };
 894
 895         static struct alpha_machine_vector *titan_vecs[] __initdata =
 896         {
 897                 &titan_mv,              /* default   */
 898                 &privateer_mv,          /* privateer */
 899                 &titan_mv,              /* falcon    */
 900                 &privateer_mv,          /* granite   */
 901         };
 902
 903         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
 904         {
 905                 NULL,
 906                 &dp264_mv,              /* dp264 */
 907                 &dp264_mv,              /* warhol */
 908                 &dp264_mv,              /* windjammer */
 909                 &monet_mv,              /* monet */
 910                 &clipper_mv,            /* clipper */
 911                 &dp264_mv,              /* goldrush */
 912                 &webbrick_mv,           /* webbrick */
 913                 &dp264_mv,              /* catamaran */
 914                 NULL,                   /* brisbane? */
 915                 NULL,                   /* melbourne? */
 916                 NULL,                   /* flying clipper? */
 917                 &shark_mv,              /* shark */
 918         };
 919
 920         /* ??? Do we need to distinguish between Rawhides?  */
 921
 922         struct alpha_machine_vector *vec;
 923
 924         /* Search the system tables first... */
 925         vec = NULL;
 926         if (type < N(systype_vecs)) {
 927                 vec = systype_vecs[type];
 928         } else if ((type > ST_API_BIAS) &&
 929                    (type - ST_API_BIAS) < N(api_vecs)) {
 930                 vec = api_vecs[type - ST_API_BIAS];
 931         } else if ((type > ST_UNOFFICIAL_BIAS) &&
 932                    (type - ST_UNOFFICIAL_BIAS) < N(unofficial_vecs)) {
 933                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
 934         }
 935
 936         /* If we've not found one, try for a variation.  */
 937
 938         if (!vec) {
 939                 /* Member ID is a bit-field. */
 940                 unsigned long member = (variation >> 10) & 0x3f;
 941
 942                 cpu &= 0xffffffff; /* make it usable */
 943
 944                 switch (type) {
 945                 case ST_DEC_ALCOR:
 946                         if (member < N(alcor_indices))
 947                                 vec = alcor_vecs[alcor_indices[member]];
 948                         break;
 949                 case ST_DEC_EB164:
 950                         if (member < N(eb164_indices))
 951                                 vec = eb164_vecs[eb164_indices[member]];
 952                         /* PC164 may show as EB164 variation with EV56 CPU,
 953                            but, since no true EB164 had anything but EV5... */
 954                         if (vec == &eb164_mv && cpu == EV56_CPU)
 955                                 vec = &pc164_mv;
 956                         break;
 957                 case ST_DEC_EB64P:
 958                         if (member < N(eb64p_indices))
 959                                 vec = eb64p_vecs[eb64p_indices[member]];
 960                         break;
 961                 case ST_DEC_EB66:
 962                         if (member < N(eb66_indices))
 963                                 vec = eb66_vecs[eb66_indices[member]];
 964                         break;
 965                 case ST_DEC_MARVEL:
 966                         if (member < N(marvel_indices))
 967                                 vec = marvel_vecs[marvel_indices[member]];
 968                         break;
 969                 case ST_DEC_TITAN:
 970                         vec = titan_vecs[0];    /* default */
 971                         if (member < N(titan_indices))
 972                                 vec = titan_vecs[titan_indices[member]];
 973                         break;
 974                 case ST_DEC_TSUNAMI:
 975                         if (member < N(tsunami_indices))
 976                                 vec = tsunami_vecs[tsunami_indices[member]];
 977                         break;
 978                 case ST_DEC_1000:
 979                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 980                                 vec = &mikasa_primo_mv;
 981                         else
 982                                 vec = &mikasa_mv;
 983                         break;
 984                 case ST_DEC_NORITAKE:
 985                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 986                                 vec = &noritake_primo_mv;
 987                         else
 988                                 vec = &noritake_mv;
 989                         break;
 990                 case ST_DEC_2100_A500:
 991                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 992                                 vec = &sable_gamma_mv;
 993                         else
 994                                 vec = &sable_mv;
 995                         break;
 996                 }
 997         }
 998         return vec;
 999 }
1000
1001 static struct alpha_machine_vector * __init
1002 get_sysvec_byname(const char *name)
1003 {
1004         static struct alpha_machine_vector *all_vecs[] __initdata =
1005         {
1006                 &alcor_mv,
1007                 &alphabook1_mv,
1008                 &avanti_mv,
1009                 &cabriolet_mv,
1010                 &clipper_mv,
1011                 &dp264_mv,
1012                 &eb164_mv,
1013                 &eb64p_mv,
1014                 &eb66_mv,
1015                 &eb66p_mv,
1016                 &eiger_mv,
1017                 &jensen_mv,
1018                 &lx164_mv,
1019                 &lynx_mv,
1020                 &miata_mv,
1021                 &mikasa_mv,
1022                 &mikasa_primo_mv,
1023                 &monet_mv,
1024                 &nautilus_mv,
1025                 &noname_mv,
1026                 &noritake_mv,
1027                 &noritake_primo_mv,
1028                 &p2k_mv,
1029                 &pc164_mv,
1030                 &privateer_mv,
1031                 &rawhide_mv,
1032                 &ruffian_mv,
1033                 &rx164_mv,
1034                 &sable_mv,
1035                 &sable_gamma_mv,
1036                 &shark_mv,
1037                 &sx164_mv,
1038                 &takara_mv,
1039                 &webbrick_mv,
1040                 &wildfire_mv,
1041                 &xl_mv,
1042                 &xlt_mv
1043         };
1044
1045         size_t i;
1046
1047         for (i = 0; i < N(all_vecs); ++i) {
1048                 struct alpha_machine_vector *mv = all_vecs[i];
1049                 if (strcasecmp(mv->vector_name, name) == 0)
1050                         return mv;
1051         }
1052         return NULL;
1053 }
1054
1055 static void
1056 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1057              char **type_name, char **variation_name)
1058 {
1059         unsigned long member;
1060
1061         /* If not in the tables, make it UNKNOWN,
1062            else set type name to family */
1063         if (type < N(systype_names)) {
1064                 *type_name = systype_names[type];
1065         } else if ((type > ST_API_BIAS) &&
1066                    (type - ST_API_BIAS) < N(api_names)) {
1067                 *type_name = api_names[type - ST_API_BIAS];
1068         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1069                    (type - ST_UNOFFICIAL_BIAS) < N(unofficial_names)) {
1070                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1071         } else {
1072                 *type_name = sys_unknown;
1073                 *variation_name = sys_unknown;
1074                 return;
1075         }
1076
1077         /* Set variation to "0"; if variation is zero, done.  */
1078         *variation_name = systype_names[0];
1079         if (variation == 0) {
1080                 return;
1081         }
1082
1083         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1084
1085         cpu &= 0xffffffff; /* make it usable */
1086
1087         switch (type) { /* select by family */
1088         default: /* default to variation "0" for now */
1089                 break;
1090         case ST_DEC_EB164:
1091                 if (member < N(eb164_indices))
1092                         *variation_name = eb164_names[eb164_indices[member]];
1093                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1094                    so, since no true EB164 had anything but EV5... */
1095                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1096                         *variation_name = eb164_names[1]; /* make it PC164 */
1097                 break;
1098         case ST_DEC_ALCOR:
1099                 if (member < N(alcor_indices))
1100                         *variation_name = alcor_names[alcor_indices[member]];
1101                 break;
1102         case ST_DEC_EB64P:
1103                 if (member < N(eb64p_indices))
1104                         *variation_name = eb64p_names[eb64p_indices[member]];
1105                 break;
1106         case ST_DEC_EB66:
1107                 if (member < N(eb66_indices))
1108                         *variation_name = eb66_names[eb66_indices[member]];
1109                 break;
1110         case ST_DEC_MARVEL:
1111                 if (member < N(marvel_indices))
1112                         *variation_name = marvel_names[marvel_indices[member]];
1113                 break;
1114         case ST_DEC_RAWHIDE:
1115                 if (member < N(rawhide_indices))
1116                         *variation_name = rawhide_names[rawhide_indices[member]];
1117                 break;
1118         case ST_DEC_TITAN:
1119                 *variation_name = titan_names[0];       /* default */
1120                 if (member < N(titan_indices))
1121                         *variation_name = titan_names[titan_indices[member]];
1122                 break;
1123         case ST_DEC_TSUNAMI:
1124                 if (member < N(tsunami_indices))
1125                         *variation_name = tsunami_names[tsunami_indices[member]];
1126                 break;
1127         }
1128 }
1129
1130 /*
1131  * A change was made to the HWRPB via an ECO and the following code
1132  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1133  * was not implemented in the console firmware.  If it's revision 5 or
1134  * greater we can get the name of the platform as an ASCII string from
1135  * the HWRPB.  That's what this function does.  It checks the revision
1136  * level and if the string is in the HWRPB it returns the address of
1137  * the string--a pointer to the name of the platform.
1138  *
1139  * Returns:
1140  *      - Pointer to a ASCII string if it's in the HWRPB
1141  *      - Pointer to a blank string if the data is not in the HWRPB.
1142  */
1143
1144 static char *
1145 platform_string(void)
1146 {
1147         struct dsr_struct *dsr;
1148         static char unk_system_string[] = "N/A";
1149
1150         /* Go to the console for the string pointer.
1151          * If the rpb_vers is not 5 or greater the rpb
1152          * is old and does not have this data in it.
1153          */
1154         if (hwrpb->revision < 5)
1155                 return (unk_system_string);
1156         else {
1157                 /* The Dynamic System Recognition struct
1158                  * has the system platform name starting
1159                  * after the character count of the string.
1160                  */
1161                 dsr =  ((struct dsr_struct *)
1162                         ((char *)hwrpb + hwrpb->dsr_offset));
1163                 return ((char *)dsr + (dsr->sysname_off +
1164                                        sizeof(long)));
1165         }
1166 }
1167
1168 static int
1169 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1170 {
1171         struct percpu_struct *cpu;
1172         unsigned long i;
1173         int count = 0;
1174
1175         for (i = 0; i < num; i++) {
1176                 cpu = (struct percpu_struct *)
1177                         ((char *)cpubase + i*hwrpb->processor_size);
1178                 if ((cpu->flags & 0x1cc) == 0x1cc)
1179                         count++;
1180         }
1181         return count;
1182 }
1183
1184 static void
1185 show_cache_size (struct seq_file *f, const char *which, int shape)
1186 {
1187         if (shape == -1)
1188                 seq_printf (f, "%s\t\t: n/a\n", which);
1189         else if (shape == 0)
1190                 seq_printf (f, "%s\t\t: unknown\n", which);
1191         else
1192                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1193                             which, shape >> 10, shape & 15,
1194                             1 << ((shape >> 4) & 15));
1195 }
1196
1197 static int
1198 show_cpuinfo(struct seq_file *f, void *slot)
1199 {
1200         extern struct unaligned_stat {
1201                 unsigned long count, va, pc;
1202         } unaligned[2];
1203
1204         static char cpu_names[][8] = {
1205                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1206                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1207                 "EV68CX", "EV7", "EV79", "EV69"
1208         };
1209
1210         struct percpu_struct *cpu = slot;
1211         unsigned int cpu_index;
1212         char *cpu_name;
1213         char *systype_name;
1214         char *sysvariation_name;
1215         int nr_processors;
1216
1217         cpu_index = (unsigned) (cpu->type - 1);
1218         cpu_name = "Unknown";
1219         if (cpu_index < N(cpu_names))
1220                 cpu_name = cpu_names[cpu_index];
1221
1222         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1223                      cpu->type, &systype_name, &sysvariation_name);
1224
1225         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1226
1227         seq_printf(f, "cpu\t\t\t: Alpha\n"
1228                       "cpu model\t\t: %s\n"
1229                       "cpu variation\t\t: %ld\n"
1230                       "cpu revision\t\t: %ld\n"
1231                       "cpu serial number\t: %s\n"
1232                       "system type\t\t: %s\n"
1233                       "system variation\t: %s\n"
1234                       "system revision\t\t: %ld\n"
1235                       "system serial number\t: %s\n"
1236                       "cycle frequency [Hz]\t: %lu %s\n"
1237                       "timer frequency [Hz]\t: %lu.%02lu\n"
1238                       "page size [bytes]\t: %ld\n"
1239                       "phys. address bits\t: %ld\n"
1240                       "max. addr. space #\t: %ld\n"
1241                       "BogoMIPS\t\t: %lu.%02lu\n"
1242                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1243                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1244                       "platform string\t\t: %s\n"
1245                       "cpus detected\t\t: %d\n",
1246                        cpu_name, cpu->variation, cpu->revision,
1247                        (char*)cpu->serial_no,
1248                        systype_name, sysvariation_name, hwrpb->sys_revision,
1249                        (char*)hwrpb->ssn,
1250                        est_cycle_freq ? : hwrpb->cycle_freq,
1251                        est_cycle_freq ? "est." : "",
1252                        hwrpb->intr_freq / 4096,
1253                        (100 * hwrpb->intr_freq / 4096) % 100,
1254                        hwrpb->pagesize,
1255                        hwrpb->pa_bits,
1256                        hwrpb->max_asn,
1257                        loops_per_jiffy / (500000/HZ),
1258                        (loops_per_jiffy / (5000/HZ)) % 100,
1259                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1260                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1261                        platform_string(), nr_processors);
1262
1263 #ifdef CONFIG_SMP
1264         seq_printf(f, "cpus active\t\t: %d\n"
1265                       "cpu active mask\t\t: %016lx\n",
1266                        num_online_cpus(), cpus_addr(cpu_possible_map)[0]);
1267 #endif
1268
1269         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1270         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1271         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1272         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1273
1274         return 0;
1275 }
1276
1277 static int __init
1278 read_mem_block(int *addr, int stride, int size)
1279 {
1280         long nloads = size / stride, cnt, tmp;
1281
1282         __asm__ __volatile__(
1283         "       rpcc    %0\n"
1284         "1:     ldl     %3,0(%2)\n"
1285         "       subq    %1,1,%1\n"
1286         /* Next two XORs introduce an explicit data dependency between
1287            consecutive loads in the loop, which will give us true load
1288            latency. */
1289         "       xor     %3,%2,%2\n"
1290         "       xor     %3,%2,%2\n"
1291         "       addq    %2,%4,%2\n"
1292         "       bne     %1,1b\n"
1293         "       rpcc    %3\n"
1294         "       subl    %3,%0,%0\n"
1295         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1296         : "r" (stride), "1" (nloads), "2" (addr));
1297
1298         return cnt / (size / stride);
1299 }
1300
1301 #define CSHAPE(totalsize, linesize, assoc) \
1302   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1303
1304 /* ??? EV5 supports up to 64M, but did the systems with more than
1305    16M of BCACHE ever exist? */
1306 #define MAX_BCACHE_SIZE 16*1024*1024
1307
1308 /* Note that the offchip caches are direct mapped on all Alphas. */
1309 static int __init
1310 external_cache_probe(int minsize, int width)
1311 {
1312         int cycles, prev_cycles = 1000000;
1313         int stride = 1 << width;
1314         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1315
1316         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1317                 maxsize = 1 << (floor_log2(max_low_pfn + 1) + PAGE_SHIFT);
1318
1319         /* Get the first block cached. */
1320         read_mem_block(__va(0), stride, size);
1321
1322         while (size < maxsize) {
1323                 /* Get an average load latency in cycles. */
1324                 cycles = read_mem_block(__va(0), stride, size);
1325                 if (cycles > prev_cycles * 2) {
1326                         /* Fine, we exceed the cache. */
1327                         printk("%ldK Bcache detected; load hit latency %d "
1328                                "cycles, load miss latency %d cycles\n",
1329                                size >> 11, prev_cycles, cycles);
1330                         return CSHAPE(size >> 1, width, 1);
1331                 }
1332                 /* Try to get the next block cached. */
1333                 read_mem_block(__va(size), stride, size);
1334                 prev_cycles = cycles;
1335                 size <<= 1;
1336         }
1337         return -1;      /* No BCACHE found. */
1338 }
1339
1340 static void __init
1341 determine_cpu_caches (unsigned int cpu_type)
1342 {
1343         int L1I, L1D, L2, L3;
1344
1345         switch (cpu_type) {
1346         case EV4_CPU:
1347         case EV45_CPU:
1348           {
1349                 if (cpu_type == EV4_CPU)
1350                         L1I = CSHAPE(8*1024, 5, 1);
1351                 else
1352                         L1I = CSHAPE(16*1024, 5, 1);
1353                 L1D = L1I;
1354                 L3 = -1;
1355
1356                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1357                    shadow copy, and may be available from some versions
1358                    of the CSERVE PALcall.  If we can get it, then
1359
1360                         unsigned long biu_ctl, size;
1361                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1362                         L2 = CSHAPE (size, 5, 1);
1363
1364                    Unfortunately, we can't rely on that.
1365                 */
1366                 L2 = external_cache_probe(128*1024, 5);
1367                 break;
1368           }
1369
1370         case LCA4_CPU:
1371           {
1372                 unsigned long car, size;
1373
1374                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1375                 L3 = -1;
1376
1377                 car = *(vuip) phys_to_virt (0x120000078UL);
1378                 size = 64*1024 * (1 << ((car >> 5) & 7));
1379                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1380                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1381                 break;
1382           }
1383
1384         case EV5_CPU:
1385         case EV56_CPU:
1386           {
1387                 unsigned long sc_ctl, width;
1388
1389                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1390
1391                 /* Check the line size of the Scache.  */
1392                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1393                 width = sc_ctl & 0x1000 ? 6 : 5;
1394                 L2 = CSHAPE (96*1024, width, 3);
1395
1396                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1397                    has a shadow copy, and may be available from some versions
1398                    of the CSERVE PALcall.  If we can get it, then
1399
1400                         unsigned long bc_control, bc_config, size;
1401                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1402                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1403
1404                    Unfortunately, we can't rely on that.
1405                 */
1406                 L3 = external_cache_probe(1024*1024, width);
1407                 break;
1408           }
1409
1410         case PCA56_CPU:
1411         case PCA57_CPU:
1412           {
1413                 unsigned long cbox_config, size;
1414
1415                 if (cpu_type == PCA56_CPU) {
1416                         L1I = CSHAPE(16*1024, 6, 1);
1417                         L1D = CSHAPE(8*1024, 5, 1);
1418                 } else {
1419                         L1I = CSHAPE(32*1024, 6, 2);
1420                         L1D = CSHAPE(16*1024, 5, 1);
1421                 }
1422                 L3 = -1;
1423
1424                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1425                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1426
1427 #if 0
1428                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1429 #else
1430                 L2 = external_cache_probe(512*1024, 6);
1431 #endif
1432                 break;
1433           }
1434
1435         case EV6_CPU:
1436         case EV67_CPU:
1437         case EV68CB_CPU:
1438         case EV68AL_CPU:
1439         case EV68CX_CPU:
1440         case EV69_CPU:
1441                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1442                 L2 = external_cache_probe(1024*1024, 6);
1443                 L3 = -1;
1444                 break;
1445
1446         case EV7_CPU:
1447         case EV79_CPU:
1448                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1449                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1450                 L3 = -1;
1451                 break;
1452
1453         default:
1454                 /* Nothing known about this cpu type.  */
1455                 L1I = L1D = L2 = L3 = 0;
1456                 break;
1457         }
1458
1459         alpha_l1i_cacheshape = L1I;
1460         alpha_l1d_cacheshape = L1D;
1461         alpha_l2_cacheshape = L2;
1462         alpha_l3_cacheshape = L3;
1463 }
1464
1465 /*
1466  * We show only CPU #0 info.
1467  */
1468 static void *
1469 c_start(struct seq_file *f, loff_t *pos)
1470 {
1471         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1472 }
1473
1474 static void *
1475 c_next(struct seq_file *f, void *v, loff_t *pos)
1476 {
1477         return NULL;
1478 }
1479
1480 static void
1481 c_stop(struct seq_file *f, void *v)
1482 {
1483 }
1484
1485 struct seq_operations cpuinfo_op = {
1486         .start  = c_start,
1487         .next   = c_next,
1488         .stop   = c_stop,
1489         .show   = show_cpuinfo,
1490 };
1491
1492
1493 static int
1494 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1495 {
1496 #if 1
1497         /* FIXME FIXME FIXME */
1498         /* If we are using SRM and serial console, just hard halt here. */
1499         if (alpha_using_srm && srmcons_output)
1500                 __halt();
1501 #endif
1502         return NOTIFY_DONE;
1503 }