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