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   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/platform_device.h>
  32 #include <linux/bootmem.h>
  33 #include <linux/pci.h>
  34 #include <linux/seq_file.h>
  35 #include <linux/root_dev.h>
  36 #include <linux/initrd.h>
  37 #include <linux/eisa.h>
  38 #include <linux/pfn.h>
  39 #ifdef CONFIG_MAGIC_SYSRQ
  40 #include <linux/sysrq.h>
  41 #include <linux/reboot.h>
  42 #endif
  43 #include <linux/notifier.h>
  44 #include <asm/setup.h>
  45 #include <asm/io.h>
  46
  47 extern struct atomic_notifier_head panic_notifier_list;
  48 static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
  49 static struct notifier_block alpha_panic_block = {
  50         alpha_panic_event,
  51         NULL,
  52         INT_MAX /* try to do it first */
  53 };
  54
  55 #include <asm/uaccess.h>
  56 #include <asm/pgtable.h>
  57 #include <asm/system.h>
  58 #include <asm/hwrpb.h>
  59 #include <asm/dma.h>
  60 #include <asm/io.h>
  61 #include <asm/mmu_context.h>
  62 #include <asm/console.h>
  63
  64 #include "proto.h"
  65 #include "pci_impl.h"
  66
  67
  68 struct hwrpb_struct *hwrpb;
  69 unsigned long srm_hae;
  70
  71 int alpha_l1i_cacheshape;
  72 int alpha_l1d_cacheshape;
  73 int alpha_l2_cacheshape;
  74 int alpha_l3_cacheshape;
  75
  76 #ifdef CONFIG_VERBOSE_MCHECK
  77 /* 0=minimum, 1=verbose, 2=all */
  78 /* These can be overridden via the command line, ie "verbose_mcheck=2") */
  79 unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
  80 #endif
  81
  82 /* Which processor we booted from.  */
  83 int boot_cpuid;
  84
  85 /*
  86  * Using SRM callbacks for initial console output. This works from
  87  * setup_arch() time through the end of time_init(), as those places
  88  * are under our (Alpha) control.
  89
  90  * "srmcons" specified in the boot command arguments allows us to
  91  * see kernel messages during the period of time before the true
  92  * console device is "registered" during console_init().
  93  * As of this version (2.5.59), console_init() will call
  94  * disable_early_printk() as the last action before initializing
  95  * the console drivers. That's the last possible time srmcons can be
  96  * unregistered without interfering with console behavior.
  97  *
  98  * By default, OFF; set it with a bootcommand arg of "srmcons" or
  99  * "console=srm". The meaning of these two args is:
 100  *     "srmcons"     - early callback prints
 101  *     "console=srm" - full callback based console, including early prints
 102  */
 103 int srmcons_output = 0;
 104
 105 /* Enforce a memory size limit; useful for testing. By default, none. */
 106 unsigned long mem_size_limit = 0;
 107
 108 /* Set AGP GART window size (0 means disabled). */
 109 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
 110
 111 #ifdef CONFIG_ALPHA_GENERIC
 112 struct alpha_machine_vector alpha_mv;
 113 int alpha_using_srm;
 114 #endif
 115
 116 #define N(a) (sizeof(a)/sizeof(a[0]))
 117
 118 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
 119                                                unsigned long);
 120 static struct alpha_machine_vector *get_sysvec_byname(const char *);
 121 static void get_sysnames(unsigned long, unsigned long, unsigned long,
 122                          char **, char **);
 123 static void determine_cpu_caches (unsigned int);
 124
 125 static char 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                 { .name = "rtc", .start = -1, .end = -1 },
 217                 { .name = "dma1", .start = 0x00, .end = 0x1f },
 218                 { .name = "pic1", .start = 0x20, .end = 0x3f },
 219                 { .name = "timer", .start = 0x40, .end = 0x5f },
 220                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
 221                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
 222                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
 223                 { .name = "dma2", .start = 0xc0, .end = 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_MAX         PFN_DOWN(0x80000000)
 247 #define for_each_mem_cluster(memdesc, cluster, i)               \
 248         for ((cluster) = (memdesc)->cluster, (i) = 0;           \
 249              (i) < (memdesc)->numclusters; (i)++, (cluster)++)
 250
 251 static unsigned long __init
 252 get_mem_size_limit(char *s)
 253 {
 254         unsigned long end = 0;
 255         char *from = s;
 256
 257         end = simple_strtoul(from, &from, 0);
 258         if ( *from == 'K' || *from == 'k' ) {
 259                 end = end << 10;
 260                 from++;
 261         } else if ( *from == 'M' || *from == 'm' ) {
 262                 end = end << 20;
 263                 from++;
 264         } else if ( *from == 'G' || *from == 'g' ) {
 265                 end = end << 30;
 266                 from++;
 267         }
 268         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
 269 }
 270
 271 #ifdef CONFIG_BLK_DEV_INITRD
 272 void * __init
 273 move_initrd(unsigned long mem_limit)
 274 {
 275         void *start;
 276         unsigned long size;
 277
 278         size = initrd_end - initrd_start;
 279         start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
 280         if (!start || __pa(start) + size > mem_limit) {
 281                 initrd_start = initrd_end = 0;
 282                 return NULL;
 283         }
 284         memmove(start, (void *)initrd_start, size);
 285         initrd_start = (unsigned long)start;
 286         initrd_end = initrd_start + size;
 287         printk("initrd moved to %p\n", start);
 288         return start;
 289 }
 290 #endif
 291
 292 #ifndef CONFIG_DISCONTIGMEM
 293 static void __init
 294 setup_memory(void *kernel_end)
 295 {
 296         struct memclust_struct * cluster;
 297         struct memdesc_struct * memdesc;
 298         unsigned long start_kernel_pfn, end_kernel_pfn;
 299         unsigned long bootmap_size, bootmap_pages, bootmap_start;
 300         unsigned long start, end;
 301         unsigned long i;
 302
 303         /* Find free clusters, and init and free the bootmem accordingly.  */
 304         memdesc = (struct memdesc_struct *)
 305           (hwrpb->mddt_offset + (unsigned long) hwrpb);
 306
 307         for_each_mem_cluster(memdesc, cluster, i) {
 308                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
 309                        i, cluster->usage, cluster->start_pfn,
 310                        cluster->start_pfn + cluster->numpages);
 311
 312                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
 313                    non-volatile memory -- we might want to mark
 314                    this for later.  */
 315                 if (cluster->usage & 3)
 316                         continue;
 317
 318                 end = cluster->start_pfn + cluster->numpages;
 319                 if (end > max_low_pfn)
 320                         max_low_pfn = end;
 321         }
 322
 323         /*
 324          * Except for the NUMA systems (wildfire, marvel) all of the
 325          * Alpha systems we run on support 32GB of memory or less.
 326          * Since the NUMA systems introduce large holes in memory addressing,
 327          * we can get into a situation where there is not enough contiguous
 328          * memory for the memory map.
 329          *
 330          * Limit memory to the first 32GB to limit the NUMA systems to
 331          * memory on their first node (wildfire) or 2 (marvel) to avoid
 332          * not being able to produce the memory map. In order to access
 333          * all of the memory on the NUMA systems, build with discontiguous
 334          * memory support.
 335          *
 336          * If the user specified a memory limit, let that memory limit stand.
 337          */
 338         if (!mem_size_limit)
 339                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
 340
 341         if (mem_size_limit && max_low_pfn >= mem_size_limit)
 342         {
 343                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
 344                        mem_size_limit << (PAGE_SHIFT - 10),
 345                        max_low_pfn    << (PAGE_SHIFT - 10));
 346                 max_low_pfn = mem_size_limit;
 347         }
 348
 349         /* Find the bounds of kernel memory.  */
 350         start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
 351         end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
 352         bootmap_start = -1;
 353
 354  try_again:
 355         if (max_low_pfn <= end_kernel_pfn)
 356                 panic("not enough memory to boot");
 357
 358         /* We need to know how many physically contiguous pages
 359            we'll need for the bootmap.  */
 360         bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
 361
 362         /* Now find a good region where to allocate the bootmap.  */
 363         for_each_mem_cluster(memdesc, cluster, i) {
 364                 if (cluster->usage & 3)
 365                         continue;
 366
 367                 start = cluster->start_pfn;
 368                 end = start + cluster->numpages;
 369                 if (start >= max_low_pfn)
 370                         continue;
 371                 if (end > max_low_pfn)
 372                         end = max_low_pfn;
 373                 if (start < start_kernel_pfn) {
 374                         if (end > end_kernel_pfn
 375                             && end - end_kernel_pfn >= bootmap_pages) {
 376                                 bootmap_start = end_kernel_pfn;
 377                                 break;
 378                         } else if (end > start_kernel_pfn)
 379                                 end = start_kernel_pfn;
 380                 } else if (start < end_kernel_pfn)
 381                         start = end_kernel_pfn;
 382                 if (end - start >= bootmap_pages) {
 383                         bootmap_start = start;
 384                         break;
 385                 }
 386         }
 387
 388         if (bootmap_start == ~0UL) {
 389                 max_low_pfn >>= 1;
 390                 goto try_again;
 391         }
 392
 393         /* Allocate the bootmap and mark the whole MM as reserved.  */
 394         bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
 395
 396         /* Mark the free regions.  */
 397         for_each_mem_cluster(memdesc, cluster, i) {
 398                 if (cluster->usage & 3)
 399                         continue;
 400
 401                 start = cluster->start_pfn;
 402                 end = cluster->start_pfn + cluster->numpages;
 403                 if (start >= max_low_pfn)
 404                         continue;
 405                 if (end > max_low_pfn)
 406                         end = max_low_pfn;
 407                 if (start < start_kernel_pfn) {
 408                         if (end > end_kernel_pfn) {
 409                                 free_bootmem(PFN_PHYS(start),
 410                                              (PFN_PHYS(start_kernel_pfn)
 411                                               - PFN_PHYS(start)));
 412                                 printk("freeing pages %ld:%ld\n",
 413                                        start, start_kernel_pfn);
 414                                 start = end_kernel_pfn;
 415                         } else if (end > start_kernel_pfn)
 416                                 end = start_kernel_pfn;
 417                 } else if (start < end_kernel_pfn)
 418                         start = end_kernel_pfn;
 419                 if (start >= end)
 420                         continue;
 421
 422                 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
 423                 printk("freeing pages %ld:%ld\n", start, end);
 424         }
 425
 426         /* Reserve the bootmap memory.  */
 427         reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size);
 428         printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
 429
 430 #ifdef CONFIG_BLK_DEV_INITRD
 431         initrd_start = INITRD_START;
 432         if (initrd_start) {
 433                 initrd_end = initrd_start+INITRD_SIZE;
 434                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
 435                        (void *) initrd_start, INITRD_SIZE);
 436
 437                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
 438                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
 439                                 printk("initrd extends beyond end of memory "
 440                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
 441                                        initrd_end,
 442                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
 443                 } else {
 444                         reserve_bootmem(virt_to_phys((void *)initrd_start),
 445                                         INITRD_SIZE);
 446                 }
 447         }
 448 #endif /* CONFIG_BLK_DEV_INITRD */
 449 }
 450 #else
 451 extern void setup_memory(void *);
 452 #endif /* !CONFIG_DISCONTIGMEM */
 453
 454 int __init
 455 page_is_ram(unsigned long pfn)
 456 {
 457         struct memclust_struct * cluster;
 458         struct memdesc_struct * memdesc;
 459         unsigned long i;
 460
 461         memdesc = (struct memdesc_struct *)
 462                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
 463         for_each_mem_cluster(memdesc, cluster, i)
 464         {
 465                 if (pfn >= cluster->start_pfn  &&
 466                     pfn < cluster->start_pfn + cluster->numpages) {
 467                         return (cluster->usage & 3) ? 0 : 1;
 468                 }
 469         }
 470
 471         return 0;
 472 }
 473
 474 void __init
 475 setup_arch(char **cmdline_p)
 476 {
 477         extern char _end[];
 478
 479         struct alpha_machine_vector *vec = NULL;
 480         struct percpu_struct *cpu;
 481         char *type_name, *var_name, *p;
 482         void *kernel_end = _end; /* end of kernel */
 483         char *args = command_line;
 484
 485         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
 486         boot_cpuid = hard_smp_processor_id();
 487
 488         /*
 489          * Pre-process the system type to make sure it will be valid.
 490          *
 491          * This may restore real CABRIO and EB66+ family names, ie
 492          * EB64+ and EB66.
 493          *
 494          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
 495          * and AS1200 (DIGITAL Server 5000 series) have the type as
 496          * the negative of the real one.
 497          */
 498         if ((long)hwrpb->sys_type < 0) {
 499                 hwrpb->sys_type = -((long)hwrpb->sys_type);
 500                 hwrpb_update_checksum(hwrpb);
 501         }
 502
 503         /* Register a call for panic conditions. */
 504         atomic_notifier_chain_register(&panic_notifier_list,
 505                         &alpha_panic_block);
 506
 507 #ifdef CONFIG_ALPHA_GENERIC
 508         /* Assume that we've booted from SRM if we haven't booted from MILO.
 509            Detect the later by looking for "MILO" in the system serial nr.  */
 510         alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
 511 #endif
 512
 513         /* If we are using SRM, we want to allow callbacks
 514            as early as possible, so do this NOW, and then
 515            they should work immediately thereafter.
 516         */
 517         kernel_end = callback_init(kernel_end);
 518
 519         /*
 520          * Locate the command line.
 521          */
 522         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
 523            boot flags depending on the boot mode, we need some shorthand.
 524            This should do for installation.  */
 525         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
 526                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
 527         } else {
 528                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
 529         }
 530         strcpy(saved_command_line, command_line);
 531         *cmdline_p = command_line;
 532
 533         /*
 534          * Process command-line arguments.
 535          */
 536         while ((p = strsep(&args, " \t")) != NULL) {
 537                 if (!*p) continue;
 538                 if (strncmp(p, "alpha_mv=", 9) == 0) {
 539                         vec = get_sysvec_byname(p+9);
 540                         continue;
 541                 }
 542                 if (strncmp(p, "cycle=", 6) == 0) {
 543                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
 544                         continue;
 545                 }
 546                 if (strncmp(p, "mem=", 4) == 0) {
 547                         mem_size_limit = get_mem_size_limit(p+4);
 548                         continue;
 549                 }
 550                 if (strncmp(p, "srmcons", 7) == 0) {
 551                         srmcons_output |= 1;
 552                         continue;
 553                 }
 554                 if (strncmp(p, "console=srm", 11) == 0) {
 555                         srmcons_output |= 2;
 556                         continue;
 557                 }
 558                 if (strncmp(p, "gartsize=", 9) == 0) {
 559                         alpha_agpgart_size =
 560                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
 561                         continue;
 562                 }
 563 #ifdef CONFIG_VERBOSE_MCHECK
 564                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
 565                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
 566                         continue;
 567                 }
 568 #endif
 569         }
 570
 571         /* Replace the command line, now that we've killed it with strsep.  */
 572         strcpy(command_line, saved_command_line);
 573
 574         /* If we want SRM console printk echoing early, do it now. */
 575         if (alpha_using_srm && srmcons_output) {
 576                 register_srm_console();
 577
 578                 /*
 579                  * If "console=srm" was specified, clear the srmcons_output
 580                  * flag now so that time.c won't unregister_srm_console
 581                  */
 582                 if (srmcons_output & 2)
 583                         srmcons_output = 0;
 584         }
 585
 586 #ifdef CONFIG_MAGIC_SYSRQ
 587         /* If we're using SRM, make sysrq-b halt back to the prom,
 588            not auto-reboot.  */
 589         if (alpha_using_srm) {
 590                 struct sysrq_key_op *op = __sysrq_get_key_op('b');
 591                 op->handler = (void *) machine_halt;
 592         }
 593 #endif
 594
 595         /*
 596          * Identify and reconfigure for the current system.
 597          */
 598         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
 599
 600         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
 601                      cpu->type, &type_name, &var_name);
 602         if (*var_name == '0')
 603                 var_name = "";
 604
 605         if (!vec) {
 606                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
 607                                  cpu->type);
 608         }
 609
 610         if (!vec) {
 611                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
 612                       type_name, (*var_name ? " variation " : ""), var_name,
 613                       hwrpb->sys_type, hwrpb->sys_variation);
 614         }
 615         if (vec != &alpha_mv) {
 616                 alpha_mv = *vec;
 617         }
 618
 619         printk("Booting "
 620 #ifdef CONFIG_ALPHA_GENERIC
 621                "GENERIC "
 622 #endif
 623                "on %s%s%s using machine vector %s from %s\n",
 624                type_name, (*var_name ? " variation " : ""),
 625                var_name, alpha_mv.vector_name,
 626                (alpha_using_srm ? "SRM" : "MILO"));
 627
 628         printk("Major Options: "
 629 #ifdef CONFIG_SMP
 630                "SMP "
 631 #endif
 632 #ifdef CONFIG_ALPHA_EV56
 633                "EV56 "
 634 #endif
 635 #ifdef CONFIG_ALPHA_EV67
 636                "EV67 "
 637 #endif
 638 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
 639                "LEGACY_START "
 640 #endif
 641 #ifdef CONFIG_VERBOSE_MCHECK
 642                "VERBOSE_MCHECK "
 643 #endif
 644
 645 #ifdef CONFIG_DISCONTIGMEM
 646                "DISCONTIGMEM "
 647 #ifdef CONFIG_NUMA
 648                "NUMA "
 649 #endif
 650 #endif
 651
 652 #ifdef CONFIG_DEBUG_SPINLOCK
 653                "DEBUG_SPINLOCK "
 654 #endif
 655 #ifdef CONFIG_MAGIC_SYSRQ
 656                "MAGIC_SYSRQ "
 657 #endif
 658                "\n");
 659
 660         printk("Command line: %s\n", command_line);
 661
 662         /*
 663          * Sync up the HAE.
 664          * Save the SRM's current value for restoration.
 665          */
 666         srm_hae = *alpha_mv.hae_register;
 667         __set_hae(alpha_mv.hae_cache);
 668
 669         /* Reset enable correctable error reports.  */
 670         wrmces(0x7);
 671
 672         /* Find our memory.  */
 673         setup_memory(kernel_end);
 674
 675         /* First guess at cpu cache sizes.  Do this before init_arch.  */
 676         determine_cpu_caches(cpu->type);
 677
 678         /* Initialize the machine.  Usually has to do with setting up
 679            DMA windows and the like.  */
 680         if (alpha_mv.init_arch)
 681                 alpha_mv.init_arch();
 682
 683         /* Reserve standard resources.  */
 684         reserve_std_resources();
 685
 686         /*
 687          * Give us a default console.  TGA users will see nothing until
 688          * chr_dev_init is called, rather late in the boot sequence.
 689          */
 690
 691 #ifdef CONFIG_VT
 692 #if defined(CONFIG_VGA_CONSOLE)
 693         conswitchp = &vga_con;
 694 #elif defined(CONFIG_DUMMY_CONSOLE)
 695         conswitchp = &dummy_con;
 696 #endif
 697 #endif
 698
 699         /* Default root filesystem to sda2.  */
 700         ROOT_DEV = Root_SDA2;
 701
 702 #ifdef CONFIG_EISA
 703         /* FIXME:  only set this when we actually have EISA in this box? */
 704         EISA_bus = 1;
 705 #endif
 706
 707         /*
 708          * Check ASN in HWRPB for validity, report if bad.
 709          * FIXME: how was this failing?  Should we trust it instead,
 710          * and copy the value into alpha_mv.max_asn?
 711          */
 712
 713         if (hwrpb->max_asn != MAX_ASN) {
 714                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
 715         }
 716
 717         /*
 718          * Identify the flock of penguins.
 719          */
 720
 721 #ifdef CONFIG_SMP
 722         setup_smp();
 723 #endif
 724         paging_init();
 725 }
 726
 727 void __init
 728 disable_early_printk(void)
 729 {
 730         if (alpha_using_srm && srmcons_output) {
 731                 unregister_srm_console();
 732                 srmcons_output = 0;
 733         }
 734 }
 735
 736 static char sys_unknown[] = "Unknown";
 737 static char systype_names[][16] = {
 738         "0",
 739         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
 740         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
 741         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
 742         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
 743         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
 744         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
 745         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
 746 };
 747
 748 static char unofficial_names[][8] = {"100", "Ruffian"};
 749
 750 static char api_names[][16] = {"200", "Nautilus"};
 751
 752 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
 753 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
 754
 755 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
 756 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
 757
 758 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
 759 static int eb64p_indices[] = {0,0,1,2};
 760
 761 static char eb66_names[][8] = {"EB66", "EB66+"};
 762 static int eb66_indices[] = {0,0,1};
 763
 764 static char marvel_names[][16] = {
 765         "Marvel/EV7"
 766 };
 767 static int marvel_indices[] = { 0 };
 768
 769 static char rawhide_names[][16] = {
 770         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
 771 };
 772 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
 773
 774 static char titan_names[][16] = {
 775         "DEFAULT", "Privateer", "Falcon", "Granite"
 776 };
 777 static int titan_indices[] = {0,1,2,2,3};
 778
 779 static char tsunami_names[][16] = {
 780         "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
 781         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
 782         "Flying Clipper", "Shark"
 783 };
 784 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
 785
 786 static struct alpha_machine_vector * __init
 787 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
 788 {
 789         static struct alpha_machine_vector *systype_vecs[] __initdata =
 790         {
 791                 NULL,           /* 0 */
 792                 NULL,           /* ADU */
 793                 NULL,           /* Cobra */
 794                 NULL,           /* Ruby */
 795                 NULL,           /* Flamingo */
 796                 NULL,           /* Mannequin */
 797                 &jensen_mv,
 798                 NULL,           /* Pelican */
 799                 NULL,           /* Morgan */
 800                 NULL,           /* Sable -- see below.  */
 801                 NULL,           /* Medulla */
 802                 &noname_mv,
 803                 NULL,           /* Turbolaser */
 804                 &avanti_mv,
 805                 NULL,           /* Mustang */
 806                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
 807                 NULL,           /* Tradewind */
 808                 NULL,           /* Mikasa -- see below.  */
 809                 NULL,           /* EB64 */
 810                 NULL,           /* EB66 -- see variation.  */
 811                 NULL,           /* EB64+ -- see variation.  */
 812                 &alphabook1_mv,
 813                 &rawhide_mv,
 814                 NULL,           /* K2 */
 815                 &lynx_mv,       /* Lynx */
 816                 &xl_mv,
 817                 NULL,           /* EB164 -- see variation.  */
 818                 NULL,           /* Noritake -- see below.  */
 819                 NULL,           /* Cortex */
 820                 NULL,           /* 29 */
 821                 &miata_mv,
 822                 NULL,           /* XXM */
 823                 &takara_mv,
 824                 NULL,           /* Yukon */
 825                 NULL,           /* Tsunami -- see variation.  */
 826                 &wildfire_mv,   /* Wildfire */
 827                 NULL,           /* CUSCO */
 828                 &eiger_mv,      /* Eiger */
 829                 NULL,           /* Titan */
 830                 NULL,           /* Marvel */
 831         };
 832
 833         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
 834         {
 835                 NULL,           /* 100 */
 836                 &ruffian_mv,
 837         };
 838
 839         static struct alpha_machine_vector *api_vecs[] __initdata =
 840         {
 841                 NULL,           /* 200 */
 842                 &nautilus_mv,
 843         };
 844
 845         static struct alpha_machine_vector *alcor_vecs[] __initdata =
 846         {
 847                 &alcor_mv, &xlt_mv, &xlt_mv
 848         };
 849
 850         static struct alpha_machine_vector *eb164_vecs[] __initdata =
 851         {
 852                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
 853         };
 854
 855         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
 856         {
 857                 &eb64p_mv,
 858                 &cabriolet_mv,
 859                 &cabriolet_mv           /* AlphaPCI64 */
 860         };
 861
 862         static struct alpha_machine_vector *eb66_vecs[] __initdata =
 863         {
 864                 &eb66_mv,
 865                 &eb66p_mv
 866         };
 867
 868         static struct alpha_machine_vector *marvel_vecs[] __initdata =
 869         {
 870                 &marvel_ev7_mv,
 871         };
 872
 873         static struct alpha_machine_vector *titan_vecs[] __initdata =
 874         {
 875                 &titan_mv,              /* default   */
 876                 &privateer_mv,          /* privateer */
 877                 &titan_mv,              /* falcon    */
 878                 &privateer_mv,          /* granite   */
 879         };
 880
 881         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
 882         {
 883                 NULL,
 884                 &dp264_mv,              /* dp264 */
 885                 &dp264_mv,              /* warhol */
 886                 &dp264_mv,              /* windjammer */
 887                 &monet_mv,              /* monet */
 888                 &clipper_mv,            /* clipper */
 889                 &dp264_mv,              /* goldrush */
 890                 &webbrick_mv,           /* webbrick */
 891                 &dp264_mv,              /* catamaran */
 892                 NULL,                   /* brisbane? */
 893                 NULL,                   /* melbourne? */
 894                 NULL,                   /* flying clipper? */
 895                 &shark_mv,              /* shark */
 896         };
 897
 898         /* ??? Do we need to distinguish between Rawhides?  */
 899
 900         struct alpha_machine_vector *vec;
 901
 902         /* Search the system tables first... */
 903         vec = NULL;
 904         if (type < N(systype_vecs)) {
 905                 vec = systype_vecs[type];
 906         } else if ((type > ST_API_BIAS) &&
 907                    (type - ST_API_BIAS) < N(api_vecs)) {
 908                 vec = api_vecs[type - ST_API_BIAS];
 909         } else if ((type > ST_UNOFFICIAL_BIAS) &&
 910                    (type - ST_UNOFFICIAL_BIAS) < N(unofficial_vecs)) {
 911                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
 912         }
 913
 914         /* If we've not found one, try for a variation.  */
 915
 916         if (!vec) {
 917                 /* Member ID is a bit-field. */
 918                 unsigned long member = (variation >> 10) & 0x3f;
 919
 920                 cpu &= 0xffffffff; /* make it usable */
 921
 922                 switch (type) {
 923                 case ST_DEC_ALCOR:
 924                         if (member < N(alcor_indices))
 925                                 vec = alcor_vecs[alcor_indices[member]];
 926                         break;
 927                 case ST_DEC_EB164:
 928                         if (member < N(eb164_indices))
 929                                 vec = eb164_vecs[eb164_indices[member]];
 930                         /* PC164 may show as EB164 variation with EV56 CPU,
 931                            but, since no true EB164 had anything but EV5... */
 932                         if (vec == &eb164_mv && cpu == EV56_CPU)
 933                                 vec = &pc164_mv;
 934                         break;
 935                 case ST_DEC_EB64P:
 936                         if (member < N(eb64p_indices))
 937                                 vec = eb64p_vecs[eb64p_indices[member]];
 938                         break;
 939                 case ST_DEC_EB66:
 940                         if (member < N(eb66_indices))
 941                                 vec = eb66_vecs[eb66_indices[member]];
 942                         break;
 943                 case ST_DEC_MARVEL:
 944                         if (member < N(marvel_indices))
 945                                 vec = marvel_vecs[marvel_indices[member]];
 946                         break;
 947                 case ST_DEC_TITAN:
 948                         vec = titan_vecs[0];    /* default */
 949                         if (member < N(titan_indices))
 950                                 vec = titan_vecs[titan_indices[member]];
 951                         break;
 952                 case ST_DEC_TSUNAMI:
 953                         if (member < N(tsunami_indices))
 954                                 vec = tsunami_vecs[tsunami_indices[member]];
 955                         break;
 956                 case ST_DEC_1000:
 957                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 958                                 vec = &mikasa_primo_mv;
 959                         else
 960                                 vec = &mikasa_mv;
 961                         break;
 962                 case ST_DEC_NORITAKE:
 963                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 964                                 vec = &noritake_primo_mv;
 965                         else
 966                                 vec = &noritake_mv;
 967                         break;
 968                 case ST_DEC_2100_A500:
 969                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 970                                 vec = &sable_gamma_mv;
 971                         else
 972                                 vec = &sable_mv;
 973                         break;
 974                 }
 975         }
 976         return vec;
 977 }
 978
 979 static struct alpha_machine_vector * __init
 980 get_sysvec_byname(const char *name)
 981 {
 982         static struct alpha_machine_vector *all_vecs[] __initdata =
 983         {
 984                 &alcor_mv,
 985                 &alphabook1_mv,
 986                 &avanti_mv,
 987                 &cabriolet_mv,
 988                 &clipper_mv,
 989                 &dp264_mv,
 990                 &eb164_mv,
 991                 &eb64p_mv,
 992                 &eb66_mv,
 993                 &eb66p_mv,
 994                 &eiger_mv,
 995                 &jensen_mv,
 996                 &lx164_mv,
 997                 &lynx_mv,
 998                 &miata_mv,
 999                 &mikasa_mv,
1000                 &mikasa_primo_mv,
1001                 &monet_mv,
1002                 &nautilus_mv,
1003                 &noname_mv,
1004                 &noritake_mv,
1005                 &noritake_primo_mv,
1006                 &p2k_mv,
1007                 &pc164_mv,
1008                 &privateer_mv,
1009                 &rawhide_mv,
1010                 &ruffian_mv,
1011                 &rx164_mv,
1012                 &sable_mv,
1013                 &sable_gamma_mv,
1014                 &shark_mv,
1015                 &sx164_mv,
1016                 &takara_mv,
1017                 &webbrick_mv,
1018                 &wildfire_mv,
1019                 &xl_mv,
1020                 &xlt_mv
1021         };
1022
1023         size_t i;
1024
1025         for (i = 0; i < N(all_vecs); ++i) {
1026                 struct alpha_machine_vector *mv = all_vecs[i];
1027                 if (strcasecmp(mv->vector_name, name) == 0)
1028                         return mv;
1029         }
1030         return NULL;
1031 }
1032
1033 static void
1034 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
1035              char **type_name, char **variation_name)
1036 {
1037         unsigned long member;
1038
1039         /* If not in the tables, make it UNKNOWN,
1040            else set type name to family */
1041         if (type < N(systype_names)) {
1042                 *type_name = systype_names[type];
1043         } else if ((type > ST_API_BIAS) &&
1044                    (type - ST_API_BIAS) < N(api_names)) {
1045                 *type_name = api_names[type - ST_API_BIAS];
1046         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1047                    (type - ST_UNOFFICIAL_BIAS) < N(unofficial_names)) {
1048                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1049         } else {
1050                 *type_name = sys_unknown;
1051                 *variation_name = sys_unknown;
1052                 return;
1053         }
1054
1055         /* Set variation to "0"; if variation is zero, done.  */
1056         *variation_name = systype_names[0];
1057         if (variation == 0) {
1058                 return;
1059         }
1060
1061         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1062
1063         cpu &= 0xffffffff; /* make it usable */
1064
1065         switch (type) { /* select by family */
1066         default: /* default to variation "0" for now */
1067                 break;
1068         case ST_DEC_EB164:
1069                 if (member < N(eb164_indices))
1070                         *variation_name = eb164_names[eb164_indices[member]];
1071                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1072                    so, since no true EB164 had anything but EV5... */
1073                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1074                         *variation_name = eb164_names[1]; /* make it PC164 */
1075                 break;
1076         case ST_DEC_ALCOR:
1077                 if (member < N(alcor_indices))
1078                         *variation_name = alcor_names[alcor_indices[member]];
1079                 break;
1080         case ST_DEC_EB64P:
1081                 if (member < N(eb64p_indices))
1082                         *variation_name = eb64p_names[eb64p_indices[member]];
1083                 break;
1084         case ST_DEC_EB66:
1085                 if (member < N(eb66_indices))
1086                         *variation_name = eb66_names[eb66_indices[member]];
1087                 break;
1088         case ST_DEC_MARVEL:
1089                 if (member < N(marvel_indices))
1090                         *variation_name = marvel_names[marvel_indices[member]];
1091                 break;
1092         case ST_DEC_RAWHIDE:
1093                 if (member < N(rawhide_indices))
1094                         *variation_name = rawhide_names[rawhide_indices[member]];
1095                 break;
1096         case ST_DEC_TITAN:
1097                 *variation_name = titan_names[0];       /* default */
1098                 if (member < N(titan_indices))
1099                         *variation_name = titan_names[titan_indices[member]];
1100                 break;
1101         case ST_DEC_TSUNAMI:
1102                 if (member < N(tsunami_indices))
1103                         *variation_name = tsunami_names[tsunami_indices[member]];
1104                 break;
1105         }
1106 }
1107
1108 /*
1109  * A change was made to the HWRPB via an ECO and the following code
1110  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1111  * was not implemented in the console firmware.  If it's revision 5 or
1112  * greater we can get the name of the platform as an ASCII string from
1113  * the HWRPB.  That's what this function does.  It checks the revision
1114  * level and if the string is in the HWRPB it returns the address of
1115  * the string--a pointer to the name of the platform.
1116  *
1117  * Returns:
1118  *      - Pointer to a ASCII string if it's in the HWRPB
1119  *      - Pointer to a blank string if the data is not in the HWRPB.
1120  */
1121
1122 static char *
1123 platform_string(void)
1124 {
1125         struct dsr_struct *dsr;
1126         static char unk_system_string[] = "N/A";
1127
1128         /* Go to the console for the string pointer.
1129          * If the rpb_vers is not 5 or greater the rpb
1130          * is old and does not have this data in it.
1131          */
1132         if (hwrpb->revision < 5)
1133                 return (unk_system_string);
1134         else {
1135                 /* The Dynamic System Recognition struct
1136                  * has the system platform name starting
1137                  * after the character count of the string.
1138                  */
1139                 dsr =  ((struct dsr_struct *)
1140                         ((char *)hwrpb + hwrpb->dsr_offset));
1141                 return ((char *)dsr + (dsr->sysname_off +
1142                                        sizeof(long)));
1143         }
1144 }
1145
1146 static int
1147 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1148 {
1149         struct percpu_struct *cpu;
1150         unsigned long i;
1151         int count = 0;
1152
1153         for (i = 0; i < num; i++) {
1154                 cpu = (struct percpu_struct *)
1155                         ((char *)cpubase + i*hwrpb->processor_size);
1156                 if ((cpu->flags & 0x1cc) == 0x1cc)
1157                         count++;
1158         }
1159         return count;
1160 }
1161
1162 static void
1163 show_cache_size (struct seq_file *f, const char *which, int shape)
1164 {
1165         if (shape == -1)
1166                 seq_printf (f, "%s\t\t: n/a\n", which);
1167         else if (shape == 0)
1168                 seq_printf (f, "%s\t\t: unknown\n", which);
1169         else
1170                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1171                             which, shape >> 10, shape & 15,
1172                             1 << ((shape >> 4) & 15));
1173 }
1174
1175 static int
1176 show_cpuinfo(struct seq_file *f, void *slot)
1177 {
1178         extern struct unaligned_stat {
1179                 unsigned long count, va, pc;
1180         } unaligned[2];
1181
1182         static char cpu_names[][8] = {
1183                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1184                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1185                 "EV68CX", "EV7", "EV79", "EV69"
1186         };
1187
1188         struct percpu_struct *cpu = slot;
1189         unsigned int cpu_index;
1190         char *cpu_name;
1191         char *systype_name;
1192         char *sysvariation_name;
1193         int nr_processors;
1194
1195         cpu_index = (unsigned) (cpu->type - 1);
1196         cpu_name = "Unknown";
1197         if (cpu_index < N(cpu_names))
1198                 cpu_name = cpu_names[cpu_index];
1199
1200         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1201                      cpu->type, &systype_name, &sysvariation_name);
1202
1203         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1204
1205         seq_printf(f, "cpu\t\t\t: Alpha\n"
1206                       "cpu model\t\t: %s\n"
1207                       "cpu variation\t\t: %ld\n"
1208                       "cpu revision\t\t: %ld\n"
1209                       "cpu serial number\t: %s\n"
1210                       "system type\t\t: %s\n"
1211                       "system variation\t: %s\n"
1212                       "system revision\t\t: %ld\n"
1213                       "system serial number\t: %s\n"
1214                       "cycle frequency [Hz]\t: %lu %s\n"
1215                       "timer frequency [Hz]\t: %lu.%02lu\n"
1216                       "page size [bytes]\t: %ld\n"
1217                       "phys. address bits\t: %ld\n"
1218                       "max. addr. space #\t: %ld\n"
1219                       "BogoMIPS\t\t: %lu.%02lu\n"
1220                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1221                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1222                       "platform string\t\t: %s\n"
1223                       "cpus detected\t\t: %d\n",
1224                        cpu_name, cpu->variation, cpu->revision,
1225                        (char*)cpu->serial_no,
1226                        systype_name, sysvariation_name, hwrpb->sys_revision,
1227                        (char*)hwrpb->ssn,
1228                        est_cycle_freq ? : hwrpb->cycle_freq,
1229                        est_cycle_freq ? "est." : "",
1230                        hwrpb->intr_freq / 4096,
1231                        (100 * hwrpb->intr_freq / 4096) % 100,
1232                        hwrpb->pagesize,
1233                        hwrpb->pa_bits,
1234                        hwrpb->max_asn,
1235                        loops_per_jiffy / (500000/HZ),
1236                        (loops_per_jiffy / (5000/HZ)) % 100,
1237                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1238                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1239                        platform_string(), nr_processors);
1240
1241 #ifdef CONFIG_SMP
1242         seq_printf(f, "cpus active\t\t: %d\n"
1243                       "cpu active mask\t\t: %016lx\n",
1244                        num_online_cpus(), cpus_addr(cpu_possible_map)[0]);
1245 #endif
1246
1247         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1248         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1249         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1250         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1251
1252         return 0;
1253 }
1254
1255 static int __init
1256 read_mem_block(int *addr, int stride, int size)
1257 {
1258         long nloads = size / stride, cnt, tmp;
1259
1260         __asm__ __volatile__(
1261         "       rpcc    %0\n"
1262         "1:     ldl     %3,0(%2)\n"
1263         "       subq    %1,1,%1\n"
1264         /* Next two XORs introduce an explicit data dependency between
1265            consecutive loads in the loop, which will give us true load
1266            latency. */
1267         "       xor     %3,%2,%2\n"
1268         "       xor     %3,%2,%2\n"
1269         "       addq    %2,%4,%2\n"
1270         "       bne     %1,1b\n"
1271         "       rpcc    %3\n"
1272         "       subl    %3,%0,%0\n"
1273         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1274         : "r" (stride), "1" (nloads), "2" (addr));
1275
1276         return cnt / (size / stride);
1277 }
1278
1279 #define CSHAPE(totalsize, linesize, assoc) \
1280   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1281
1282 /* ??? EV5 supports up to 64M, but did the systems with more than
1283    16M of BCACHE ever exist? */
1284 #define MAX_BCACHE_SIZE 16*1024*1024
1285
1286 /* Note that the offchip caches are direct mapped on all Alphas. */
1287 static int __init
1288 external_cache_probe(int minsize, int width)
1289 {
1290         int cycles, prev_cycles = 1000000;
1291         int stride = 1 << width;
1292         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1293
1294         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1295                 maxsize = 1 << (floor_log2(max_low_pfn + 1) + PAGE_SHIFT);
1296
1297         /* Get the first block cached. */
1298         read_mem_block(__va(0), stride, size);
1299
1300         while (size < maxsize) {
1301                 /* Get an average load latency in cycles. */
1302                 cycles = read_mem_block(__va(0), stride, size);
1303                 if (cycles > prev_cycles * 2) {
1304                         /* Fine, we exceed the cache. */
1305                         printk("%ldK Bcache detected; load hit latency %d "
1306                                "cycles, load miss latency %d cycles\n",
1307                                size >> 11, prev_cycles, cycles);
1308                         return CSHAPE(size >> 1, width, 1);
1309                 }
1310                 /* Try to get the next block cached. */
1311                 read_mem_block(__va(size), stride, size);
1312                 prev_cycles = cycles;
1313                 size <<= 1;
1314         }
1315         return -1;      /* No BCACHE found. */
1316 }
1317
1318 static void __init
1319 determine_cpu_caches (unsigned int cpu_type)
1320 {
1321         int L1I, L1D, L2, L3;
1322
1323         switch (cpu_type) {
1324         case EV4_CPU:
1325         case EV45_CPU:
1326           {
1327                 if (cpu_type == EV4_CPU)
1328                         L1I = CSHAPE(8*1024, 5, 1);
1329                 else
1330                         L1I = CSHAPE(16*1024, 5, 1);
1331                 L1D = L1I;
1332                 L3 = -1;
1333
1334                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1335                    shadow copy, and may be available from some versions
1336                    of the CSERVE PALcall.  If we can get it, then
1337
1338                         unsigned long biu_ctl, size;
1339                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1340                         L2 = CSHAPE (size, 5, 1);
1341
1342                    Unfortunately, we can't rely on that.
1343                 */
1344                 L2 = external_cache_probe(128*1024, 5);
1345                 break;
1346           }
1347
1348         case LCA4_CPU:
1349           {
1350                 unsigned long car, size;
1351
1352                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1353                 L3 = -1;
1354
1355                 car = *(vuip) phys_to_virt (0x120000078UL);
1356                 size = 64*1024 * (1 << ((car >> 5) & 7));
1357                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1358                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1359                 break;
1360           }
1361
1362         case EV5_CPU:
1363         case EV56_CPU:
1364           {
1365                 unsigned long sc_ctl, width;
1366
1367                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1368
1369                 /* Check the line size of the Scache.  */
1370                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1371                 width = sc_ctl & 0x1000 ? 6 : 5;
1372                 L2 = CSHAPE (96*1024, width, 3);
1373
1374                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1375                    has a shadow copy, and may be available from some versions
1376                    of the CSERVE PALcall.  If we can get it, then
1377
1378                         unsigned long bc_control, bc_config, size;
1379                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1380                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1381
1382                    Unfortunately, we can't rely on that.
1383                 */
1384                 L3 = external_cache_probe(1024*1024, width);
1385                 break;
1386           }
1387
1388         case PCA56_CPU:
1389         case PCA57_CPU:
1390           {
1391                 unsigned long cbox_config, size;
1392
1393                 if (cpu_type == PCA56_CPU) {
1394                         L1I = CSHAPE(16*1024, 6, 1);
1395                         L1D = CSHAPE(8*1024, 5, 1);
1396                 } else {
1397                         L1I = CSHAPE(32*1024, 6, 2);
1398                         L1D = CSHAPE(16*1024, 5, 1);
1399                 }
1400                 L3 = -1;
1401
1402                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1403                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1404
1405 #if 0
1406                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1407 #else
1408                 L2 = external_cache_probe(512*1024, 6);
1409 #endif
1410                 break;
1411           }
1412
1413         case EV6_CPU:
1414         case EV67_CPU:
1415         case EV68CB_CPU:
1416         case EV68AL_CPU:
1417         case EV68CX_CPU:
1418         case EV69_CPU:
1419                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1420                 L2 = external_cache_probe(1024*1024, 6);
1421                 L3 = -1;
1422                 break;
1423
1424         case EV7_CPU:
1425         case EV79_CPU:
1426                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1427                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1428                 L3 = -1;
1429                 break;
1430
1431         default:
1432                 /* Nothing known about this cpu type.  */
1433                 L1I = L1D = L2 = L3 = 0;
1434                 break;
1435         }
1436
1437         alpha_l1i_cacheshape = L1I;
1438         alpha_l1d_cacheshape = L1D;
1439         alpha_l2_cacheshape = L2;
1440         alpha_l3_cacheshape = L3;
1441 }
1442
1443 /*
1444  * We show only CPU #0 info.
1445  */
1446 static void *
1447 c_start(struct seq_file *f, loff_t *pos)
1448 {
1449         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1450 }
1451
1452 static void *
1453 c_next(struct seq_file *f, void *v, loff_t *pos)
1454 {
1455         return NULL;
1456 }
1457
1458 static void
1459 c_stop(struct seq_file *f, void *v)
1460 {
1461 }
1462
1463 struct seq_operations cpuinfo_op = {
1464         .start  = c_start,
1465         .next   = c_next,
1466         .stop   = c_stop,
1467         .show   = show_cpuinfo,
1468 };
1469
1470
1471 static int
1472 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1473 {
1474 #if 1
1475         /* FIXME FIXME FIXME */
1476         /* If we are using SRM and serial console, just hard halt here. */
1477         if (alpha_using_srm && srmcons_output)
1478                 __halt();
1479 #endif
1480         return NOTIFY_DONE;
1481 }
1482
1483 static __init int add_pcspkr(void)
1484 {
1485         struct platform_device *pd;
1486         int ret;
1487
1488         pd = platform_device_alloc("pcspkr", -1);
1489         if (!pd)
1490                 return -ENOMEM;
1491
1492         ret = platform_device_add(pd);
1493         if (ret)
1494                 platform_device_put(pd);
1495
1496         return ret;
1497 }
1498 device_initcall(add_pcspkr);