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/errno.h>
  28 #include <linux/init.h>
  29 #include <linux/string.h>
  30 #include <linux/ioport.h>
  31 #include <linux/bootmem.h>
  32 #include <linux/pci.h>
  33 #include <linux/seq_file.h>
  34 #include <linux/root_dev.h>
  35 #include <linux/initrd.h>
  36 #include <linux/eisa.h>
  37 #ifdef CONFIG_MAGIC_SYSRQ
  38 #include <linux/sysrq.h>
  39 #include <linux/reboot.h>
  40 #endif
  41 #include <linux/notifier.h>
  42 #include <asm/io.h>
  43
  44 extern struct notifier_block *panic_notifier_list;
  45 static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
  46 static struct notifier_block alpha_panic_block = {
  47         alpha_panic_event,
  48         NULL,
  49         INT_MAX /* try to do it first */
  50 };
  51
  52 #include <asm/uaccess.h>
  53 #include <asm/pgtable.h>
  54 #include <asm/system.h>
  55 #include <asm/hwrpb.h>
  56 #include <asm/dma.h>
  57 #include <asm/io.h>
  58 #include <asm/mmu_context.h>
  59 #include <asm/console.h>
  60
  61 #include "proto.h"
  62 #include "pci_impl.h"
  63
  64
  65 struct hwrpb_struct *hwrpb;
  66 unsigned long srm_hae;
  67
  68 int alpha_l1i_cacheshape;
  69 int alpha_l1d_cacheshape;
  70 int alpha_l2_cacheshape;
  71 int alpha_l3_cacheshape;
  72
  73 #ifdef CONFIG_VERBOSE_MCHECK
  74 /* 0=minimum, 1=verbose, 2=all */
  75 /* These can be overridden via the command line, ie "verbose_mcheck=2") */
  76 unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
  77 #endif
  78
  79 /* Which processor we booted from.  */
  80 int boot_cpuid;
  81
  82 /*
  83  * Using SRM callbacks for initial console output. This works from
  84  * setup_arch() time through the end of time_init(), as those places
  85  * are under our (Alpha) control.
  86
  87  * "srmcons" specified in the boot command arguments allows us to
  88  * see kernel messages during the period of time before the true
  89  * console device is "registered" during console_init().
  90  * As of this version (2.5.59), console_init() will call
  91  * disable_early_printk() as the last action before initializing
  92  * the console drivers. That's the last possible time srmcons can be
  93  * unregistered without interfering with console behavior.
  94  *
  95  * By default, OFF; set it with a bootcommand arg of "srmcons" or
  96  * "console=srm". The meaning of these two args is:
  97  *     "srmcons"     - early callback prints
  98  *     "console=srm" - full callback based console, including early prints
  99  */
 100 int srmcons_output = 0;
 101
 102 /* Enforce a memory size limit; useful for testing. By default, none. */
 103 unsigned long mem_size_limit = 0;
 104
 105 /* Set AGP GART window size (0 means disabled). */
 106 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
 107
 108 #ifdef CONFIG_ALPHA_GENERIC
 109 struct alpha_machine_vector alpha_mv;
 110 int alpha_using_srm;
 111 #endif
 112
 113 unsigned char aux_device_present = 0xaa;
 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 char saved_command_line[COMMAND_LINE_SIZE];
 126
 127 /*
 128  * The format of "screen_info" is strange, and due to early
 129  * i386-setup code. This is just enough to make the console
 130  * code think we're on a VGA color display.
 131  */
 132
 133 struct screen_info screen_info = {
 134         .orig_x = 0,
 135         .orig_y = 25,
 136         .orig_video_cols = 80,
 137         .orig_video_lines = 25,
 138         .orig_video_isVGA = 1,
 139         .orig_video_points = 16
 140 };
 141
 142 /*
 143  * The direct map I/O window, if any.  This should be the same
 144  * for all busses, since it's used by virt_to_bus.
 145  */
 146
 147 unsigned long __direct_map_base;
 148 unsigned long __direct_map_size;
 149
 150 /*
 151  * Declare all of the machine vectors.
 152  */
 153
 154 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either
 155    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
 156    to the assembler.  */
 157
 158 #define WEAK(X) \
 159         extern struct alpha_machine_vector X; \
 160         asm(".weak "#X)
 161
 162 WEAK(alcor_mv);
 163 WEAK(alphabook1_mv);
 164 WEAK(avanti_mv);
 165 WEAK(cabriolet_mv);
 166 WEAK(clipper_mv);
 167 WEAK(dp264_mv);
 168 WEAK(eb164_mv);
 169 WEAK(eb64p_mv);
 170 WEAK(eb66_mv);
 171 WEAK(eb66p_mv);
 172 WEAK(eiger_mv);
 173 WEAK(jensen_mv);
 174 WEAK(lx164_mv);
 175 WEAK(lynx_mv);
 176 WEAK(marvel_ev7_mv);
 177 WEAK(miata_mv);
 178 WEAK(mikasa_mv);
 179 WEAK(mikasa_primo_mv);
 180 WEAK(monet_mv);
 181 WEAK(nautilus_mv);
 182 WEAK(noname_mv);
 183 WEAK(noritake_mv);
 184 WEAK(noritake_primo_mv);
 185 WEAK(p2k_mv);
 186 WEAK(pc164_mv);
 187 WEAK(privateer_mv);
 188 WEAK(rawhide_mv);
 189 WEAK(ruffian_mv);
 190 WEAK(rx164_mv);
 191 WEAK(sable_mv);
 192 WEAK(sable_gamma_mv);
 193 WEAK(shark_mv);
 194 WEAK(sx164_mv);
 195 WEAK(takara_mv);
 196 WEAK(titan_mv);
 197 WEAK(webbrick_mv);
 198 WEAK(wildfire_mv);
 199 WEAK(xl_mv);
 200 WEAK(xlt_mv);
 201
 202 #undef WEAK
 203
 204 /*
 205  * I/O resources inherited from PeeCees.  Except for perhaps the
 206  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
 207  *
 208  * ??? If this becomes less standard, move the struct out into the
 209  * machine vector.
 210  */
 211
 212 static void __init
 213 reserve_std_resources(void)
 214 {
 215         static struct resource standard_io_resources[] = {
 216                 { "rtc", -1, -1 },
 217                 { "dma1", 0x00, 0x1f },
 218                 { "pic1", 0x20, 0x3f },
 219                 { "timer", 0x40, 0x5f },
 220                 { "keyboard", 0x60, 0x6f },
 221                 { "dma page reg", 0x80, 0x8f },
 222                 { "pic2", 0xa0, 0xbf },
 223                 { "dma2", 0xc0, 0xdf },
 224         };
 225
 226         struct resource *io = &ioport_resource;
 227         size_t i;
 228
 229         if (hose_head) {
 230                 struct pci_controller *hose;
 231                 for (hose = hose_head; hose; hose = hose->next)
 232                         if (hose->index == 0) {
 233                                 io = hose->io_space;
 234                                 break;
 235                         }
 236         }
 237
 238         /* Fix up for the Jensen's queer RTC placement.  */
 239         standard_io_resources[0].start = RTC_PORT(0);
 240         standard_io_resources[0].end = RTC_PORT(0) + 0x10;
 241
 242         for (i = 0; i < N(standard_io_resources); ++i)
 243                 request_resource(io, standard_io_resources+i);
 244 }
 245
 246 #define PFN_UP(x)       (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
 247 #define PFN_DOWN(x)     ((x) >> PAGE_SHIFT)
 248 #define PFN_PHYS(x)     ((x) << PAGE_SHIFT)
 249 #define PFN_MAX         PFN_DOWN(0x80000000)
 250 #define for_each_mem_cluster(memdesc, cluster, i)               \
 251         for ((cluster) = (memdesc)->cluster, (i) = 0;           \
 252              (i) < (memdesc)->numclusters; (i)++, (cluster)++)
 253
 254 static unsigned long __init
 255 get_mem_size_limit(char *s)
 256 {
 257         unsigned long end = 0;
 258         char *from = s;
 259
 260         end = simple_strtoul(from, &from, 0);
 261         if ( *from == 'K' || *from == 'k' ) {
 262                 end = end << 10;
 263                 from++;
 264         } else if ( *from == 'M' || *from == 'm' ) {
 265                 end = end << 20;
 266                 from++;
 267         } else if ( *from == 'G' || *from == 'g' ) {
 268                 end = end << 30;
 269                 from++;
 270         }
 271         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
 272 }
 273
 274 #ifdef CONFIG_BLK_DEV_INITRD
 275 void * __init
 276 move_initrd(unsigned long mem_limit)
 277 {
 278         void *start;
 279         unsigned long size;
 280
 281         size = initrd_end - initrd_start;
 282         start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
 283         if (!start || __pa(start) + size > mem_limit) {
 284                 initrd_start = initrd_end = 0;
 285                 return NULL;
 286         }
 287         memmove(start, (void *)initrd_start, size);
 288         initrd_start = (unsigned long)start;
 289         initrd_end = initrd_start + size;
 290         printk("initrd moved to %p\n", start);
 291         return start;
 292 }
 293 #endif
 294
 295 #ifndef CONFIG_DISCONTIGMEM
 296 static void __init
 297 setup_memory(void *kernel_end)
 298 {
 299         struct memclust_struct * cluster;
 300         struct memdesc_struct * memdesc;
 301         unsigned long start_kernel_pfn, end_kernel_pfn;
 302         unsigned long bootmap_size, bootmap_pages, bootmap_start;
 303         unsigned long start, end;
 304         unsigned long i;
 305
 306         /* Find free clusters, and init and free the bootmem accordingly.  */
 307         memdesc = (struct memdesc_struct *)
 308           (hwrpb->mddt_offset + (unsigned long) hwrpb);
 309
 310         for_each_mem_cluster(memdesc, cluster, i) {
 311                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
 312                        i, cluster->usage, cluster->start_pfn,
 313                        cluster->start_pfn + cluster->numpages);
 314
 315                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
 316                    non-volatile memory -- we might want to mark
 317                    this for later.  */
 318                 if (cluster->usage & 3)
 319                         continue;
 320
 321                 end = cluster->start_pfn + cluster->numpages;
 322                 if (end > max_low_pfn)
 323                         max_low_pfn = end;
 324         }
 325
 326         /*
 327          * Except for the NUMA systems (wildfire, marvel) all of the
 328          * Alpha systems we run on support 32GB of memory or less.
 329          * Since the NUMA systems introduce large holes in memory addressing,
 330          * we can get into a situation where there is not enough contiguous
 331          * memory for the memory map.
 332          *
 333          * Limit memory to the first 32GB to limit the NUMA systems to
 334          * memory on their first node (wildfire) or 2 (marvel) to avoid
 335          * not being able to produce the memory map. In order to access
 336          * all of the memory on the NUMA systems, build with discontiguous
 337          * memory support.
 338          *
 339          * If the user specified a memory limit, let that memory limit stand.
 340          */
 341         if (!mem_size_limit)
 342                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
 343
 344         if (mem_size_limit && max_low_pfn >= mem_size_limit)
 345         {
 346                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
 347                        mem_size_limit << (PAGE_SHIFT - 10),
 348                        max_low_pfn    << (PAGE_SHIFT - 10));
 349                 max_low_pfn = mem_size_limit;
 350         }
 351
 352         /* Find the bounds of kernel memory.  */
 353         start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
 354         end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
 355         bootmap_start = -1;
 356
 357  try_again:
 358         if (max_low_pfn <= end_kernel_pfn)
 359                 panic("not enough memory to boot");
 360
 361         /* We need to know how many physically contiguous pages
 362            we'll need for the bootmap.  */
 363         bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
 364
 365         /* Now find a good region where to allocate the bootmap.  */
 366         for_each_mem_cluster(memdesc, cluster, i) {
 367                 if (cluster->usage & 3)
 368                         continue;
 369
 370                 start = cluster->start_pfn;
 371                 end = start + cluster->numpages;
 372                 if (start >= max_low_pfn)
 373                         continue;
 374                 if (end > max_low_pfn)
 375                         end = max_low_pfn;
 376                 if (start < start_kernel_pfn) {
 377                         if (end > end_kernel_pfn
 378                             && end - end_kernel_pfn >= bootmap_pages) {
 379                                 bootmap_start = end_kernel_pfn;
 380                                 break;
 381                         } else if (end > start_kernel_pfn)
 382                                 end = start_kernel_pfn;
 383                 } else if (start < end_kernel_pfn)
 384                         start = end_kernel_pfn;
 385                 if (end - start >= bootmap_pages) {
 386                         bootmap_start = start;
 387                         break;
 388                 }
 389         }
 390
 391         if (bootmap_start == ~0UL) {
 392                 max_low_pfn >>= 1;
 393                 goto try_again;
 394         }
 395
 396         /* Allocate the bootmap and mark the whole MM as reserved.  */
 397         bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
 398
 399         /* Mark the free regions.  */
 400         for_each_mem_cluster(memdesc, cluster, i) {
 401                 if (cluster->usage & 3)
 402                         continue;
 403
 404                 start = cluster->start_pfn;
 405                 end = cluster->start_pfn + cluster->numpages;
 406                 if (start >= max_low_pfn)
 407                         continue;
 408                 if (end > max_low_pfn)
 409                         end = max_low_pfn;
 410                 if (start < start_kernel_pfn) {
 411                         if (end > end_kernel_pfn) {
 412                                 free_bootmem(PFN_PHYS(start),
 413                                              (PFN_PHYS(start_kernel_pfn)
 414                                               - PFN_PHYS(start)));
 415                                 printk("freeing pages %ld:%ld\n",
 416                                        start, start_kernel_pfn);
 417                                 start = end_kernel_pfn;
 418                         } else if (end > start_kernel_pfn)
 419                                 end = start_kernel_pfn;
 420                 } else if (start < end_kernel_pfn)
 421                         start = end_kernel_pfn;
 422                 if (start >= end)
 423                         continue;
 424
 425                 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
 426                 printk("freeing pages %ld:%ld\n", start, end);
 427         }
 428
 429         /* Reserve the bootmap memory.  */
 430         reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size);
 431         printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
 432
 433 #ifdef CONFIG_BLK_DEV_INITRD
 434         initrd_start = INITRD_START;
 435         if (initrd_start) {
 436                 initrd_end = initrd_start+INITRD_SIZE;
 437                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
 438                        (void *) initrd_start, INITRD_SIZE);
 439
 440                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
 441                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
 442                                 printk("initrd extends beyond end of memory "
 443                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
 444                                        initrd_end,
 445                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
 446                 } else {
 447                         reserve_bootmem(virt_to_phys((void *)initrd_start),
 448                                         INITRD_SIZE);
 449                 }
 450         }
 451 #endif /* CONFIG_BLK_DEV_INITRD */
 452 }
 453 #else
 454 extern void setup_memory(void *);
 455 #endif /* !CONFIG_DISCONTIGMEM */
 456
 457 int __init
 458 page_is_ram(unsigned long pfn)
 459 {
 460         struct memclust_struct * cluster;
 461         struct memdesc_struct * memdesc;
 462         unsigned long i;
 463
 464         memdesc = (struct memdesc_struct *)
 465                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
 466         for_each_mem_cluster(memdesc, cluster, i)
 467         {
 468                 if (pfn >= cluster->start_pfn  &&
 469                     pfn < cluster->start_pfn + cluster->numpages) {
 470                         return (cluster->usage & 3) ? 0 : 1;
 471                 }
 472         }
 473
 474         return 0;
 475 }
 476
 477 #undef PFN_UP
 478 #undef PFN_DOWN
 479 #undef PFN_PHYS
 480 #undef PFN_MAX
 481
 482 void __init
 483 setup_arch(char **cmdline_p)
 484 {
 485         extern char _end[];
 486
 487         struct alpha_machine_vector *vec = NULL;
 488         struct percpu_struct *cpu;
 489         char *type_name, *var_name, *p;
 490         void *kernel_end = _end; /* end of kernel */
 491         char *args = command_line;
 492
 493         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
 494         boot_cpuid = hard_smp_processor_id();
 495
 496         /*
 497          * Pre-process the system type to make sure it will be valid.
 498          *
 499          * This may restore real CABRIO and EB66+ family names, ie
 500          * EB64+ and EB66.
 501          *
 502          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
 503          * and AS1200 (DIGITAL Server 5000 series) have the type as
 504          * the negative of the real one.
 505          */
 506         if ((long)hwrpb->sys_type < 0) {
 507                 hwrpb->sys_type = -((long)hwrpb->sys_type);
 508                 hwrpb_update_checksum(hwrpb);
 509         }
 510
 511         /* Register a call for panic conditions. */
 512         notifier_chain_register(&panic_notifier_list, &alpha_panic_block);
 513
 514 #ifdef CONFIG_ALPHA_GENERIC
 515         /* Assume that we've booted from SRM if we haven't booted from MILO.
 516            Detect the later by looking for "MILO" in the system serial nr.  */
 517         alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
 518 #endif
 519
 520         /* If we are using SRM, we want to allow callbacks
 521            as early as possible, so do this NOW, and then
 522            they should work immediately thereafter.
 523         */
 524         kernel_end = callback_init(kernel_end);
 525
 526         /*
 527          * Locate the command line.
 528          */
 529         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
 530            boot flags depending on the boot mode, we need some shorthand.
 531            This should do for installation.  */
 532         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
 533                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
 534         } else {
 535                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
 536         }
 537         strcpy(saved_command_line, command_line);
 538         *cmdline_p = command_line;
 539
 540         /*
 541          * Process command-line arguments.
 542          */
 543         while ((p = strsep(&args, " \t")) != NULL) {
 544                 if (!*p) continue;
 545                 if (strncmp(p, "alpha_mv=", 9) == 0) {
 546                         vec = get_sysvec_byname(p+9);
 547                         continue;
 548                 }
 549                 if (strncmp(p, "cycle=", 6) == 0) {
 550                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
 551                         continue;
 552                 }
 553                 if (strncmp(p, "mem=", 4) == 0) {
 554                         mem_size_limit = get_mem_size_limit(p+4);
 555                         continue;
 556                 }
 557                 if (strncmp(p, "srmcons", 7) == 0) {
 558                         srmcons_output |= 1;
 559                         continue;
 560                 }
 561                 if (strncmp(p, "console=srm", 11) == 0) {
 562                         srmcons_output |= 2;
 563                         continue;
 564                 }
 565                 if (strncmp(p, "gartsize=", 9) == 0) {
 566                         alpha_agpgart_size =
 567                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
 568                         continue;
 569                 }
 570 #ifdef CONFIG_VERBOSE_MCHECK
 571                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
 572                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
 573                         continue;
 574                 }
 575 #endif
 576         }
 577
 578         /* Replace the command line, now that we've killed it with strsep.  */
 579         strcpy(command_line, saved_command_line);
 580
 581         /* If we want SRM console printk echoing early, do it now. */
 582         if (alpha_using_srm && srmcons_output) {
 583                 register_srm_console();
 584
 585                 /*
 586                  * If "console=srm" was specified, clear the srmcons_output
 587                  * flag now so that time.c won't unregister_srm_console
 588                  */
 589                 if (srmcons_output & 2)
 590                         srmcons_output = 0;
 591         }
 592
 593 #ifdef CONFIG_MAGIC_SYSRQ
 594         /* If we're using SRM, make sysrq-b halt back to the prom,
 595            not auto-reboot.  */
 596         if (alpha_using_srm) {
 597                 struct sysrq_key_op *op = __sysrq_get_key_op('b');
 598                 op->handler = (void *) machine_halt;
 599         }
 600 #endif
 601
 602         /*
 603          * Identify and reconfigure for the current system.
 604          */
 605         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
 606
 607         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
 608                      cpu->type, &type_name, &var_name);
 609         if (*var_name == '0')
 610                 var_name = "";
 611
 612         if (!vec) {
 613                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
 614                                  cpu->type);
 615         }
 616
 617         if (!vec) {
 618                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
 619                       type_name, (*var_name ? " variation " : ""), var_name,
 620                       hwrpb->sys_type, hwrpb->sys_variation);
 621         }
 622         if (vec != &alpha_mv) {
 623                 alpha_mv = *vec;
 624         }
 625
 626         printk("Booting "
 627 #ifdef CONFIG_ALPHA_GENERIC
 628                "GENERIC "
 629 #endif
 630                "on %s%s%s using machine vector %s from %s\n",
 631                type_name, (*var_name ? " variation " : ""),
 632                var_name, alpha_mv.vector_name,
 633                (alpha_using_srm ? "SRM" : "MILO"));
 634
 635         printk("Major Options: "
 636 #ifdef CONFIG_SMP
 637                "SMP "
 638 #endif
 639 #ifdef CONFIG_ALPHA_EV56
 640                "EV56 "
 641 #endif
 642 #ifdef CONFIG_ALPHA_EV67
 643                "EV67 "
 644 #endif
 645 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
 646                "LEGACY_START "
 647 #endif
 648 #ifdef CONFIG_VERBOSE_MCHECK
 649                "VERBOSE_MCHECK "
 650 #endif
 651
 652 #ifdef CONFIG_DISCONTIGMEM
 653                "DISCONTIGMEM "
 654 #ifdef CONFIG_NUMA
 655                "NUMA "
 656 #endif
 657 #endif
 658
 659 #ifdef CONFIG_DEBUG_SPINLOCK
 660                "DEBUG_SPINLOCK "
 661 #endif
 662 #ifdef CONFIG_MAGIC_SYSRQ
 663                "MAGIC_SYSRQ "
 664 #endif
 665                "\n");
 666
 667         printk("Command line: %s\n", command_line);
 668
 669         /*
 670          * Sync up the HAE.
 671          * Save the SRM's current value for restoration.
 672          */
 673         srm_hae = *alpha_mv.hae_register;
 674         __set_hae(alpha_mv.hae_cache);
 675
 676         /* Reset enable correctable error reports.  */
 677         wrmces(0x7);
 678
 679         /* Find our memory.  */
 680         setup_memory(kernel_end);
 681
 682         /* First guess at cpu cache sizes.  Do this before init_arch.  */
 683         determine_cpu_caches(cpu->type);
 684
 685         /* Initialize the machine.  Usually has to do with setting up
 686            DMA windows and the like.  */
 687         if (alpha_mv.init_arch)
 688                 alpha_mv.init_arch();
 689
 690         /* Reserve standard resources.  */
 691         reserve_std_resources();
 692
 693         /*
 694          * Give us a default console.  TGA users will see nothing until
 695          * chr_dev_init is called, rather late in the boot sequence.
 696          */
 697
 698 #ifdef CONFIG_VT
 699 #if defined(CONFIG_VGA_CONSOLE)
 700         conswitchp = &vga_con;
 701 #elif defined(CONFIG_DUMMY_CONSOLE)
 702         conswitchp = &dummy_con;
 703 #endif
 704 #endif
 705
 706         /* Default root filesystem to sda2.  */
 707         ROOT_DEV = Root_SDA2;
 708
 709 #ifdef CONFIG_EISA
 710         /* FIXME:  only set this when we actually have EISA in this box? */
 711         EISA_bus = 1;
 712 #endif
 713
 714         /*
 715          * Check ASN in HWRPB for validity, report if bad.
 716          * FIXME: how was this failing?  Should we trust it instead,
 717          * and copy the value into alpha_mv.max_asn?
 718          */
 719
 720         if (hwrpb->max_asn != MAX_ASN) {
 721                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
 722         }
 723
 724         /*
 725          * Identify the flock of penguins.
 726          */
 727
 728 #ifdef CONFIG_SMP
 729         setup_smp();
 730 #endif
 731         paging_init();
 732 }
 733
 734 void __init
 735 disable_early_printk(void)
 736 {
 737         if (alpha_using_srm && srmcons_output) {
 738                 unregister_srm_console();
 739                 srmcons_output = 0;
 740         }
 741 }
 742
 743 static char sys_unknown[] = "Unknown";
 744 static char systype_names[][16] = {
 745         "0",
 746         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
 747         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
 748         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
 749         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
 750         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
 751         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
 752         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
 753 };
 754
 755 static char unofficial_names[][8] = {"100", "Ruffian"};
 756
 757 static char api_names[][16] = {"200", "Nautilus"};
 758
 759 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
 760 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
 761
 762 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
 763 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
 764
 765 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
 766 static int eb64p_indices[] = {0,0,1,2};
 767
 768 static char eb66_names[][8] = {"EB66", "EB66+"};
 769 static int eb66_indices[] = {0,0,1};
 770
 771 static char marvel_names[][16] = {
 772         "Marvel/EV7"
 773 };
 774 static int marvel_indices[] = { 0 };
 775
 776 static char rawhide_names[][16] = {
 777         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
 778 };
 779 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
 780
 781 static char titan_names[][16] = {
 782         "DEFAULT", "Privateer", "Falcon", "Granite"
 783 };
 784 static int titan_indices[] = {0,1,2,2,3};
 785
 786 static char tsunami_names[][16] = {
 787         "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
 788         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
 789         "Flying Clipper", "Shark"
 790 };
 791 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
 792
 793 static struct alpha_machine_vector * __init
 794 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
 795 {
 796         static struct alpha_machine_vector *systype_vecs[] __initdata =
 797         {
 798                 NULL,           /* 0 */
 799                 NULL,           /* ADU */
 800                 NULL,           /* Cobra */
 801                 NULL,           /* Ruby */
 802                 NULL,           /* Flamingo */
 803                 NULL,           /* Mannequin */
 804                 &jensen_mv,
 805                 NULL,           /* Pelican */
 806                 NULL,           /* Morgan */
 807                 NULL,           /* Sable -- see below.  */
 808                 NULL,           /* Medulla */
 809                 &noname_mv,
 810                 NULL,           /* Turbolaser */
 811                 &avanti_mv,
 812                 NULL,           /* Mustang */
 813                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
 814                 NULL,           /* Tradewind */
 815                 NULL,           /* Mikasa -- see below.  */
 816                 NULL,           /* EB64 */
 817                 NULL,           /* EB66 -- see variation.  */
 818                 NULL,           /* EB64+ -- see variation.  */
 819                 &alphabook1_mv,
 820                 &rawhide_mv,
 821                 NULL,           /* K2 */
 822                 &lynx_mv,       /* Lynx */
 823                 &xl_mv,
 824                 NULL,           /* EB164 -- see variation.  */
 825                 NULL,           /* Noritake -- see below.  */
 826                 NULL,           /* Cortex */
 827                 NULL,           /* 29 */
 828                 &miata_mv,
 829                 NULL,           /* XXM */
 830                 &takara_mv,
 831                 NULL,           /* Yukon */
 832                 NULL,           /* Tsunami -- see variation.  */
 833                 &wildfire_mv,   /* Wildfire */
 834                 NULL,           /* CUSCO */
 835                 &eiger_mv,      /* Eiger */
 836                 NULL,           /* Titan */
 837                 NULL,           /* Marvel */
 838         };
 839
 840         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
 841         {
 842                 NULL,           /* 100 */
 843                 &ruffian_mv,
 844         };
 845
 846         static struct alpha_machine_vector *api_vecs[] __initdata =
 847         {
 848                 NULL,           /* 200 */
 849                 &nautilus_mv,
 850         };
 851
 852         static struct alpha_machine_vector *alcor_vecs[] __initdata =
 853         {
 854                 &alcor_mv, &xlt_mv, &xlt_mv
 855         };
 856
 857         static struct alpha_machine_vector *eb164_vecs[] __initdata =
 858         {
 859                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
 860         };
 861
 862         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
 863         {
 864                 &eb64p_mv,
 865                 &cabriolet_mv,
 866                 &cabriolet_mv           /* AlphaPCI64 */
 867         };
 868
 869         static struct alpha_machine_vector *eb66_vecs[] __initdata =
 870         {
 871                 &eb66_mv,
 872                 &eb66p_mv
 873         };
 874
 875         static struct alpha_machine_vector *marvel_vecs[] __initdata =
 876         {
 877                 &marvel_ev7_mv,
 878         };
 879
 880         static struct alpha_machine_vector *titan_vecs[] __initdata =
 881         {
 882                 &titan_mv,              /* default   */
 883                 &privateer_mv,          /* privateer */
 884                 &titan_mv,              /* falcon    */
 885                 &privateer_mv,          /* granite   */
 886         };
 887
 888         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
 889         {
 890                 NULL,
 891                 &dp264_mv,              /* dp264 */
 892                 &dp264_mv,              /* warhol */
 893                 &dp264_mv,              /* windjammer */
 894                 &monet_mv,              /* monet */
 895                 &clipper_mv,            /* clipper */
 896                 &dp264_mv,              /* goldrush */
 897                 &webbrick_mv,           /* webbrick */
 898                 &dp264_mv,              /* catamaran */
 899                 NULL,                   /* brisbane? */
 900                 NULL,                   /* melbourne? */
 901                 NULL,                   /* flying clipper? */
 902                 &shark_mv,              /* shark */
 903         };
 904
 905         /* ??? Do we need to distinguish between Rawhides?  */
 906
 907         struct alpha_machine_vector *vec;
 908
 909         /* Search the system tables first... */
 910         vec = NULL;
 911         if (type < N(systype_vecs)) {
 912                 vec = systype_vecs[type];
 913         } else if ((type > ST_API_BIAS) &&
 914                    (type - ST_API_BIAS) < N(api_vecs)) {
 915                 vec = api_vecs[type - ST_API_BIAS];
 916         } else if ((type > ST_UNOFFICIAL_BIAS) &&
 917                    (type - ST_UNOFFICIAL_BIAS) < N(unofficial_vecs)) {
 918                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
 919         }
 920
 921         /* If we've not found one, try for a variation.  */
 922
 923         if (!vec) {
 924                 /* Member ID is a bit-field. */
 925                 unsigned long member = (variation >> 10) & 0x3f;
 926
 927                 cpu &= 0xffffffff; /* make it usable */
 928
 929                 switch (type) {
 930                 case ST_DEC_ALCOR:
 931                         if (member < N(alcor_indices))
 932                                 vec = alcor_vecs[alcor_indices[member]];
 933                         break;
 934                 case ST_DEC_EB164:
 935                         if (member < N(eb164_indices))
 936                                 vec = eb164_vecs[eb164_indices[member]];
 937                         /* PC164 may show as EB164 variation with EV56 CPU,
 938                            but, since no true EB164 had anything but EV5... */
 939                         if (vec == &eb164_mv && cpu == EV56_CPU)
 940                                 vec = &pc164_mv;
 941                         break;
 942                 case ST_DEC_EB64P:
 943                         if (member < N(eb64p_indices))
 944                                 vec = eb64p_vecs[eb64p_indices[member]];
 945                         break;
 946                 case ST_DEC_EB66:
 947                         if (member < N(eb66_indices))
 948                                 vec = eb66_vecs[eb66_indices[member]];
 949                         break;
 950                 case ST_DEC_MARVEL:
 951                         if (member < N(marvel_indices))
 952                                 vec = marvel_vecs[marvel_indices[member]];
 953                         break;
 954                 case ST_DEC_TITAN:
 955                         vec = titan_vecs[0];    /* default */
 956                         if (member < N(titan_indices))
 957                                 vec = titan_vecs[titan_indices[member]];
 958                         break;
 959                 case ST_DEC_TSUNAMI:
 960                         if (member < N(tsunami_indices))
 961                                 vec = tsunami_vecs[tsunami_indices[member]];
 962                         break;
 963                 case ST_DEC_1000:
 964                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 965                                 vec = &mikasa_primo_mv;
 966                         else
 967                                 vec = &mikasa_mv;
 968                         break;
 969                 case ST_DEC_NORITAKE:
 970                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 971                                 vec = &noritake_primo_mv;
 972                         else
 973                                 vec = &noritake_mv;
 974                         break;
 975                 case ST_DEC_2100_A500:
 976                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 977                                 vec = &sable_gamma_mv;
 978                         else
 979                                 vec = &sable_mv;
 980                         break;
 981                 }
 982         }
 983         return vec;
 984 }
 985
 986 static struct alpha_machine_vector * __init
 987 get_sysvec_byname(const char *name)
 988 {
 989         static struct alpha_machine_vector *all_vecs[] __initdata =
 990         {
 991                 &alcor_mv,
 992                 &alphabook1_mv,
 993                 &avanti_mv,
 994                 &cabriolet_mv,
 995                 &clipper_mv,
 996                 &dp264_mv,
 997                 &eb164_mv,
 998                 &eb64p_mv,
 999                 &eb66_mv,
1000                 &eb66p_mv,
1001                 &eiger_mv,
1002                 &jensen_mv,
1003                 &lx164_mv,
1004                 &lynx_mv,
1005                 &miata_mv,
1006                 &mikasa_mv,
1007                 &mikasa_primo_mv,
1008                 &monet_mv,
1009                 &nautilus_mv,
1010                 &noname_mv,
1011                 &noritake_mv,
1012                 &noritake_primo_mv,
1013                 &p2k_mv,
1014                 &pc164_mv,
1015                 &privateer_mv,
1016                 &rawhide_mv,
1017                 &ruffian_mv,
1018                 &rx164_mv,
1019                 &sable_mv,
1020                 &sable_gamma_mv,
1021                 &shark_mv,
1022                 &sx164_mv,
1023                 &takara_mv,
1024                 &webbrick_mv,
1025                 &wildfire_mv,
1026                 &xl_mv,
1027                 &xlt_mv
1028         };
1029
1030         size_t i;
1031
1032         for (i = 0; i < N(all_vecs); ++i) {
1033                 struct alpha_machine_vector *mv = all_vecs[i];
1034                 if (strcasecmp(mv->vector_name, name) == 0)
1035                         return mv;
1036         }
1037         return NULL;
1038 }
1039
1040 static void
1041 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1042              char **type_name, char **variation_name)
1043 {
1044         unsigned long member;
1045
1046         /* If not in the tables, make it UNKNOWN,
1047            else set type name to family */
1048         if (type < N(systype_names)) {
1049                 *type_name = systype_names[type];
1050         } else if ((type > ST_API_BIAS) &&
1051                    (type - ST_API_BIAS) < N(api_names)) {
1052                 *type_name = api_names[type - ST_API_BIAS];
1053         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1054                    (type - ST_UNOFFICIAL_BIAS) < N(unofficial_names)) {
1055                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1056         } else {
1057                 *type_name = sys_unknown;
1058                 *variation_name = sys_unknown;
1059                 return;
1060         }
1061
1062         /* Set variation to "0"; if variation is zero, done.  */
1063         *variation_name = systype_names[0];
1064         if (variation == 0) {
1065                 return;
1066         }
1067
1068         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1069
1070         cpu &= 0xffffffff; /* make it usable */
1071
1072         switch (type) { /* select by family */
1073         default: /* default to variation "0" for now */
1074                 break;
1075         case ST_DEC_EB164:
1076                 if (member < N(eb164_indices))
1077                         *variation_name = eb164_names[eb164_indices[member]];
1078                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1079                    so, since no true EB164 had anything but EV5... */
1080                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1081                         *variation_name = eb164_names[1]; /* make it PC164 */
1082                 break;
1083         case ST_DEC_ALCOR:
1084                 if (member < N(alcor_indices))
1085                         *variation_name = alcor_names[alcor_indices[member]];
1086                 break;
1087         case ST_DEC_EB64P:
1088                 if (member < N(eb64p_indices))
1089                         *variation_name = eb64p_names[eb64p_indices[member]];
1090                 break;
1091         case ST_DEC_EB66:
1092                 if (member < N(eb66_indices))
1093                         *variation_name = eb66_names[eb66_indices[member]];
1094                 break;
1095         case ST_DEC_MARVEL:
1096                 if (member < N(marvel_indices))
1097                         *variation_name = marvel_names[marvel_indices[member]];
1098                 break;
1099         case ST_DEC_RAWHIDE:
1100                 if (member < N(rawhide_indices))
1101                         *variation_name = rawhide_names[rawhide_indices[member]];
1102                 break;
1103         case ST_DEC_TITAN:
1104                 *variation_name = titan_names[0];       /* default */
1105                 if (member < N(titan_indices))
1106                         *variation_name = titan_names[titan_indices[member]];
1107                 break;
1108         case ST_DEC_TSUNAMI:
1109                 if (member < N(tsunami_indices))
1110                         *variation_name = tsunami_names[tsunami_indices[member]];
1111                 break;
1112         }
1113 }
1114
1115 /*
1116  * A change was made to the HWRPB via an ECO and the following code
1117  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1118  * was not implemented in the console firmware.  If it's revision 5 or
1119  * greater we can get the name of the platform as an ASCII string from
1120  * the HWRPB.  That's what this function does.  It checks the revision
1121  * level and if the string is in the HWRPB it returns the address of
1122  * the string--a pointer to the name of the platform.
1123  *
1124  * Returns:
1125  *      - Pointer to a ASCII string if it's in the HWRPB
1126  *      - Pointer to a blank string if the data is not in the HWRPB.
1127  */
1128
1129 static char *
1130 platform_string(void)
1131 {
1132         struct dsr_struct *dsr;
1133         static char unk_system_string[] = "N/A";
1134
1135         /* Go to the console for the string pointer.
1136          * If the rpb_vers is not 5 or greater the rpb
1137          * is old and does not have this data in it.
1138          */
1139         if (hwrpb->revision < 5)
1140                 return (unk_system_string);
1141         else {
1142                 /* The Dynamic System Recognition struct
1143                  * has the system platform name starting
1144                  * after the character count of the string.
1145                  */
1146                 dsr =  ((struct dsr_struct *)
1147                         ((char *)hwrpb + hwrpb->dsr_offset));
1148                 return ((char *)dsr + (dsr->sysname_off +
1149                                        sizeof(long)));
1150         }
1151 }
1152
1153 static int
1154 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1155 {
1156         struct percpu_struct *cpu;
1157         unsigned long i;
1158         int count = 0;
1159
1160         for (i = 0; i < num; i++) {
1161                 cpu = (struct percpu_struct *)
1162                         ((char *)cpubase + i*hwrpb->processor_size);
1163                 if ((cpu->flags & 0x1cc) == 0x1cc)
1164                         count++;
1165         }
1166         return count;
1167 }
1168
1169 static void
1170 show_cache_size (struct seq_file *f, const char *which, int shape)
1171 {
1172         if (shape == -1)
1173                 seq_printf (f, "%s\t\t: n/a\n", which);
1174         else if (shape == 0)
1175                 seq_printf (f, "%s\t\t: unknown\n", which);
1176         else
1177                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1178                             which, shape >> 10, shape & 15,
1179                             1 << ((shape >> 4) & 15));
1180 }
1181
1182 static int
1183 show_cpuinfo(struct seq_file *f, void *slot)
1184 {
1185         extern struct unaligned_stat {
1186                 unsigned long count, va, pc;
1187         } unaligned[2];
1188
1189         static char cpu_names[][8] = {
1190                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1191                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1192                 "EV68CX", "EV7", "EV79", "EV69"
1193         };
1194
1195         struct percpu_struct *cpu = slot;
1196         unsigned int cpu_index;
1197         char *cpu_name;
1198         char *systype_name;
1199         char *sysvariation_name;
1200         int nr_processors;
1201
1202         cpu_index = (unsigned) (cpu->type - 1);
1203         cpu_name = "Unknown";
1204         if (cpu_index < N(cpu_names))
1205                 cpu_name = cpu_names[cpu_index];
1206
1207         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1208                      cpu->type, &systype_name, &sysvariation_name);
1209
1210         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1211
1212         seq_printf(f, "cpu\t\t\t: Alpha\n"
1213                       "cpu model\t\t: %s\n"
1214                       "cpu variation\t\t: %ld\n"
1215                       "cpu revision\t\t: %ld\n"
1216                       "cpu serial number\t: %s\n"
1217                       "system type\t\t: %s\n"
1218                       "system variation\t: %s\n"
1219                       "system revision\t\t: %ld\n"
1220                       "system serial number\t: %s\n"
1221                       "cycle frequency [Hz]\t: %lu %s\n"
1222                       "timer frequency [Hz]\t: %lu.%02lu\n"
1223                       "page size [bytes]\t: %ld\n"
1224                       "phys. address bits\t: %ld\n"
1225                       "max. addr. space #\t: %ld\n"
1226                       "BogoMIPS\t\t: %lu.%02lu\n"
1227                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1228                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1229                       "platform string\t\t: %s\n"
1230                       "cpus detected\t\t: %d\n",
1231                        cpu_name, cpu->variation, cpu->revision,
1232                        (char*)cpu->serial_no,
1233                        systype_name, sysvariation_name, hwrpb->sys_revision,
1234                        (char*)hwrpb->ssn,
1235                        est_cycle_freq ? : hwrpb->cycle_freq,
1236                        est_cycle_freq ? "est." : "",
1237                        hwrpb->intr_freq / 4096,
1238                        (100 * hwrpb->intr_freq / 4096) % 100,
1239                        hwrpb->pagesize,
1240                        hwrpb->pa_bits,
1241                        hwrpb->max_asn,
1242                        loops_per_jiffy / (500000/HZ),
1243                        (loops_per_jiffy / (5000/HZ)) % 100,
1244                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1245                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1246                        platform_string(), nr_processors);
1247
1248 #ifdef CONFIG_SMP
1249         seq_printf(f, "cpus active\t\t: %ld\n"
1250                       "cpu active mask\t\t: %016lx\n",
1251                        num_online_cpus(), cpu_present_mask);
1252 #endif
1253
1254         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1255         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1256         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1257         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1258
1259         return 0;
1260 }
1261
1262 static int __init
1263 read_mem_block(int *addr, int stride, int size)
1264 {
1265         long nloads = size / stride, cnt, tmp;
1266
1267         __asm__ __volatile__(
1268         "       rpcc    %0\n"
1269         "1:     ldl     %3,0(%2)\n"
1270         "       subq    %1,1,%1\n"
1271         /* Next two XORs introduce an explicit data dependency between
1272            consecutive loads in the loop, which will give us true load
1273            latency. */
1274         "       xor     %3,%2,%2\n"
1275         "       xor     %3,%2,%2\n"
1276         "       addq    %2,%4,%2\n"
1277         "       bne     %1,1b\n"
1278         "       rpcc    %3\n"
1279         "       subl    %3,%0,%0\n"
1280         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1281         : "r" (stride), "1" (nloads), "2" (addr));
1282
1283         return cnt / (size / stride);
1284 }
1285
1286 #define CSHAPE(totalsize, linesize, assoc) \
1287   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1288
1289 /* ??? EV5 supports up to 64M, but did the systems with more than
1290    16M of BCACHE ever exist? */
1291 #define MAX_BCACHE_SIZE 16*1024*1024
1292
1293 /* Note that the offchip caches are direct mapped on all Alphas. */
1294 static int __init
1295 external_cache_probe(int minsize, int width)
1296 {
1297         int cycles, prev_cycles = 1000000;
1298         int stride = 1 << width;
1299         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1300
1301         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1302                 maxsize = 1 << (floor_log2(max_low_pfn + 1) + PAGE_SHIFT);
1303
1304         /* Get the first block cached. */
1305         read_mem_block(__va(0), stride, size);
1306
1307         while (size < maxsize) {
1308                 /* Get an average load latency in cycles. */
1309                 cycles = read_mem_block(__va(0), stride, size);
1310                 if (cycles > prev_cycles * 2) {
1311                         /* Fine, we exceed the cache. */
1312                         printk("%ldK Bcache detected; load hit latency %d "
1313                                "cycles, load miss latency %d cycles\n",
1314                                size >> 11, prev_cycles, cycles);
1315                         return CSHAPE(size >> 1, width, 1);
1316                 }
1317                 /* Try to get the next block cached. */
1318                 read_mem_block(__va(size), stride, size);
1319                 prev_cycles = cycles;
1320                 size <<= 1;
1321         }
1322         return -1;      /* No BCACHE found. */
1323 }
1324
1325 static void __init
1326 determine_cpu_caches (unsigned int cpu_type)
1327 {
1328         int L1I, L1D, L2, L3;
1329
1330         switch (cpu_type) {
1331         case EV4_CPU:
1332         case EV45_CPU:
1333           {
1334                 if (cpu_type == EV4_CPU)
1335                         L1I = CSHAPE(8*1024, 5, 1);
1336                 else
1337                         L1I = CSHAPE(16*1024, 5, 1);
1338                 L1D = L1I;
1339                 L3 = -1;
1340
1341                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1342                    shadow copy, and may be available from some versions
1343                    of the CSERVE PALcall.  If we can get it, then
1344
1345                         unsigned long biu_ctl, size;
1346                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1347                         L2 = CSHAPE (size, 5, 1);
1348
1349                    Unfortunately, we can't rely on that.
1350                 */
1351                 L2 = external_cache_probe(128*1024, 5);
1352                 break;
1353           }
1354
1355         case LCA4_CPU:
1356           {
1357                 unsigned long car, size;
1358
1359                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1360                 L3 = -1;
1361
1362                 car = *(vuip) phys_to_virt (0x120000078UL);
1363                 size = 64*1024 * (1 << ((car >> 5) & 7));
1364                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1365                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1366                 break;
1367           }
1368
1369         case EV5_CPU:
1370         case EV56_CPU:
1371           {
1372                 unsigned long sc_ctl, width;
1373
1374                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1375
1376                 /* Check the line size of the Scache.  */
1377                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1378                 width = sc_ctl & 0x1000 ? 6 : 5;
1379                 L2 = CSHAPE (96*1024, width, 3);
1380
1381                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1382                    has a shadow copy, and may be available from some versions
1383                    of the CSERVE PALcall.  If we can get it, then
1384
1385                         unsigned long bc_control, bc_config, size;
1386                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1387                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1388
1389                    Unfortunately, we can't rely on that.
1390                 */
1391                 L3 = external_cache_probe(1024*1024, width);
1392                 break;
1393           }
1394
1395         case PCA56_CPU:
1396         case PCA57_CPU:
1397           {
1398                 unsigned long cbox_config, size;
1399
1400                 if (cpu_type == PCA56_CPU) {
1401                         L1I = CSHAPE(16*1024, 6, 1);
1402                         L1D = CSHAPE(8*1024, 5, 1);
1403                 } else {
1404                         L1I = CSHAPE(32*1024, 6, 2);
1405                         L1D = CSHAPE(16*1024, 5, 1);
1406                 }
1407                 L3 = -1;
1408
1409                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1410                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1411
1412 #if 0
1413                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1414 #else
1415                 L2 = external_cache_probe(512*1024, 6);
1416 #endif
1417                 break;
1418           }
1419
1420         case EV6_CPU:
1421         case EV67_CPU:
1422         case EV68CB_CPU:
1423         case EV68AL_CPU:
1424         case EV68CX_CPU:
1425         case EV69_CPU:
1426                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1427                 L2 = external_cache_probe(1024*1024, 6);
1428                 L3 = -1;
1429                 break;
1430
1431         case EV7_CPU:
1432         case EV79_CPU:
1433                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1434                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1435                 L3 = -1;
1436                 break;
1437
1438         default:
1439                 /* Nothing known about this cpu type.  */
1440                 L1I = L1D = L2 = L3 = 0;
1441                 break;
1442         }
1443
1444         alpha_l1i_cacheshape = L1I;
1445         alpha_l1d_cacheshape = L1D;
1446         alpha_l2_cacheshape = L2;
1447         alpha_l3_cacheshape = L3;
1448 }
1449
1450 /*
1451  * We show only CPU #0 info.
1452  */
1453 static void *
1454 c_start(struct seq_file *f, loff_t *pos)
1455 {
1456         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1457 }
1458
1459 static void *
1460 c_next(struct seq_file *f, void *v, loff_t *pos)
1461 {
1462         return NULL;
1463 }
1464
1465 static void
1466 c_stop(struct seq_file *f, void *v)
1467 {
1468 }
1469
1470 struct seq_operations cpuinfo_op = {
1471         .start  = c_start,
1472         .next   = c_next,
1473         .stop   = c_stop,
1474         .show   = show_cpuinfo,
1475 };
1476
1477
1478 static int
1479 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1480 {
1481 #if 1
1482         /* FIXME FIXME FIXME */
1483         /* If we are using SRM and serial console, just hard halt here. */
1484         if (alpha_using_srm && srmcons_output)
1485                 __halt();
1486 #endif
1487         return NOTIFY_DONE;
1488 }