arch/alpha/kernel/setup.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/arch/alpha/kernel/setup.c
   4  *
   5  *  Copyright (C) 1995  Linus Torvalds
   6  */
   7
   8 /* 2.3.x bootmem, 1999 Andrea Arcangeli <andrea@suse.de> */
   9
  10 /*
  11  * Bootup setup stuff.
  12  */
  13
  14 #include <linux/sched.h>
  15 #include <linux/kernel.h>
  16 #include <linux/mm.h>
  17 #include <linux/stddef.h>
  18 #include <linux/unistd.h>
  19 #include <linux/ptrace.h>
  20 #include <linux/slab.h>
  21 #include <linux/user.h>
  22 #include <linux/screen_info.h>
  23 #include <linux/delay.h>
  24 #include <linux/mc146818rtc.h>
  25 #include <linux/console.h>
  26 #include <linux/cpu.h>
  27 #include <linux/errno.h>
  28 #include <linux/init.h>
  29 #include <linux/string.h>
  30 #include <linux/ioport.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/memblock.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 #include <linux/log2.h>
  47 #include <linux/export.h>
  48
  49 extern struct atomic_notifier_head panic_notifier_list;
  50 static int alpha_panic_event(struct notifier_block *, unsigned long, void *);
  51 static struct notifier_block alpha_panic_block = {
  52         alpha_panic_event,
  53         NULL,
  54         INT_MAX /* try to do it first */
  55 };
  56
  57 #include <linux/uaccess.h>
  58 #include <asm/pgtable.h>
  59 #include <asm/hwrpb.h>
  60 #include <asm/dma.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 EXPORT_SYMBOL(hwrpb);
  70 unsigned long srm_hae;
  71
  72 int alpha_l1i_cacheshape;
  73 int alpha_l1d_cacheshape;
  74 int alpha_l2_cacheshape;
  75 int alpha_l3_cacheshape;
  76
  77 #ifdef CONFIG_VERBOSE_MCHECK
  78 /* 0=minimum, 1=verbose, 2=all */
  79 /* These can be overridden via the command line, ie "verbose_mcheck=2") */
  80 unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
  81 #endif
  82
  83 #ifdef CONFIG_NUMA
  84 struct cpumask node_to_cpumask_map[MAX_NUMNODES] __read_mostly;
  85 EXPORT_SYMBOL(node_to_cpumask_map);
  86 #endif
  87
  88 /* Which processor we booted from.  */
  89 int boot_cpuid;
  90
  91 /*
  92  * Using SRM callbacks for initial console output. This works from
  93  * setup_arch() time through the end of time_init(), as those places
  94  * are under our (Alpha) control.
  95
  96  * "srmcons" specified in the boot command arguments allows us to
  97  * see kernel messages during the period of time before the true
  98  * console device is "registered" during console_init().
  99  * As of this version (2.5.59), console_init() will call
 100  * disable_early_printk() as the last action before initializing
 101  * the console drivers. That's the last possible time srmcons can be
 102  * unregistered without interfering with console behavior.
 103  *
 104  * By default, OFF; set it with a bootcommand arg of "srmcons" or
 105  * "console=srm". The meaning of these two args is:
 106  *     "srmcons"     - early callback prints
 107  *     "console=srm" - full callback based console, including early prints
 108  */
 109 int srmcons_output = 0;
 110
 111 /* Enforce a memory size limit; useful for testing. By default, none. */
 112 unsigned long mem_size_limit = 0;
 113
 114 /* Set AGP GART window size (0 means disabled). */
 115 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE;
 116
 117 #ifdef CONFIG_ALPHA_GENERIC
 118 struct alpha_machine_vector alpha_mv;
 119 EXPORT_SYMBOL(alpha_mv);
 120 #endif
 121
 122 #ifndef alpha_using_srm
 123 int alpha_using_srm;
 124 EXPORT_SYMBOL(alpha_using_srm);
 125 #endif
 126
 127 #ifndef alpha_using_qemu
 128 int alpha_using_qemu;
 129 #endif
 130
 131 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
 132                                                unsigned long);
 133 static struct alpha_machine_vector *get_sysvec_byname(const char *);
 134 static void get_sysnames(unsigned long, unsigned long, unsigned long,
 135                          char **, char **);
 136 static void determine_cpu_caches (unsigned int);
 137
 138 static char __initdata command_line[COMMAND_LINE_SIZE];
 139
 140 /*
 141  * The format of "screen_info" is strange, and due to early
 142  * i386-setup code. This is just enough to make the console
 143  * code think we're on a VGA color display.
 144  */
 145
 146 struct screen_info screen_info = {
 147         .orig_x = 0,
 148         .orig_y = 25,
 149         .orig_video_cols = 80,
 150         .orig_video_lines = 25,
 151         .orig_video_isVGA = 1,
 152         .orig_video_points = 16
 153 };
 154
 155 EXPORT_SYMBOL(screen_info);
 156
 157 /*
 158  * The direct map I/O window, if any.  This should be the same
 159  * for all busses, since it's used by virt_to_bus.
 160  */
 161
 162 unsigned long __direct_map_base;
 163 unsigned long __direct_map_size;
 164 EXPORT_SYMBOL(__direct_map_base);
 165 EXPORT_SYMBOL(__direct_map_size);
 166
 167 /*
 168  * Declare all of the machine vectors.
 169  */
 170
 171 /* GCC 2.7.2 (on alpha at least) is lame.  It does not support either
 172    __attribute__((weak)) or #pragma weak.  Bypass it and talk directly
 173    to the assembler.  */
 174
 175 #define WEAK(X) \
 176         extern struct alpha_machine_vector X; \
 177         asm(".weak "#X)
 178
 179 WEAK(alcor_mv);
 180 WEAK(alphabook1_mv);
 181 WEAK(avanti_mv);
 182 WEAK(cabriolet_mv);
 183 WEAK(clipper_mv);
 184 WEAK(dp264_mv);
 185 WEAK(eb164_mv);
 186 WEAK(eb64p_mv);
 187 WEAK(eb66_mv);
 188 WEAK(eb66p_mv);
 189 WEAK(eiger_mv);
 190 WEAK(jensen_mv);
 191 WEAK(lx164_mv);
 192 WEAK(lynx_mv);
 193 WEAK(marvel_ev7_mv);
 194 WEAK(miata_mv);
 195 WEAK(mikasa_mv);
 196 WEAK(mikasa_primo_mv);
 197 WEAK(monet_mv);
 198 WEAK(nautilus_mv);
 199 WEAK(noname_mv);
 200 WEAK(noritake_mv);
 201 WEAK(noritake_primo_mv);
 202 WEAK(p2k_mv);
 203 WEAK(pc164_mv);
 204 WEAK(privateer_mv);
 205 WEAK(rawhide_mv);
 206 WEAK(ruffian_mv);
 207 WEAK(rx164_mv);
 208 WEAK(sable_mv);
 209 WEAK(sable_gamma_mv);
 210 WEAK(shark_mv);
 211 WEAK(sx164_mv);
 212 WEAK(takara_mv);
 213 WEAK(titan_mv);
 214 WEAK(webbrick_mv);
 215 WEAK(wildfire_mv);
 216 WEAK(xl_mv);
 217 WEAK(xlt_mv);
 218
 219 #undef WEAK
 220
 221 /*
 222  * I/O resources inherited from PeeCees.  Except for perhaps the
 223  * turbochannel alphas, everyone has these on some sort of SuperIO chip.
 224  *
 225  * ??? If this becomes less standard, move the struct out into the
 226  * machine vector.
 227  */
 228
 229 static void __init
 230 reserve_std_resources(void)
 231 {
 232         static struct resource standard_io_resources[] = {
 233                 { .name = "rtc", .start = -1, .end = -1 },
 234                 { .name = "dma1", .start = 0x00, .end = 0x1f },
 235                 { .name = "pic1", .start = 0x20, .end = 0x3f },
 236                 { .name = "timer", .start = 0x40, .end = 0x5f },
 237                 { .name = "keyboard", .start = 0x60, .end = 0x6f },
 238                 { .name = "dma page reg", .start = 0x80, .end = 0x8f },
 239                 { .name = "pic2", .start = 0xa0, .end = 0xbf },
 240                 { .name = "dma2", .start = 0xc0, .end = 0xdf },
 241         };
 242
 243         struct resource *io = &ioport_resource;
 244         size_t i;
 245
 246         if (hose_head) {
 247                 struct pci_controller *hose;
 248                 for (hose = hose_head; hose; hose = hose->next)
 249                         if (hose->index == 0) {
 250                                 io = hose->io_space;
 251                                 break;
 252                         }
 253         }
 254
 255         /* Fix up for the Jensen's queer RTC placement.  */
 256         standard_io_resources[0].start = RTC_PORT(0);
 257         standard_io_resources[0].end = RTC_PORT(0) + 0x10;
 258
 259         for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
 260                 request_resource(io, standard_io_resources+i);
 261 }
 262
 263 #define PFN_MAX         PFN_DOWN(0x80000000)
 264 #define for_each_mem_cluster(memdesc, _cluster, i)              \
 265         for ((_cluster) = (memdesc)->cluster, (i) = 0;          \
 266              (i) < (memdesc)->numclusters; (i)++, (_cluster)++)
 267
 268 static unsigned long __init
 269 get_mem_size_limit(char *s)
 270 {
 271         unsigned long end = 0;
 272         char *from = s;
 273
 274         end = simple_strtoul(from, &from, 0);
 275         if ( *from == 'K' || *from == 'k' ) {
 276                 end = end << 10;
 277                 from++;
 278         } else if ( *from == 'M' || *from == 'm' ) {
 279                 end = end << 20;
 280                 from++;
 281         } else if ( *from == 'G' || *from == 'g' ) {
 282                 end = end << 30;
 283                 from++;
 284         }
 285         return end >> PAGE_SHIFT; /* Return the PFN of the limit. */
 286 }
 287
 288 #ifdef CONFIG_BLK_DEV_INITRD
 289 void * __init
 290 move_initrd(unsigned long mem_limit)
 291 {
 292         void *start;
 293         unsigned long size;
 294
 295         size = initrd_end - initrd_start;
 296         start = memblock_alloc(PAGE_ALIGN(size), PAGE_SIZE);
 297         if (!start || __pa(start) + size > mem_limit) {
 298                 initrd_start = initrd_end = 0;
 299                 return NULL;
 300         }
 301         memmove(start, (void *)initrd_start, size);
 302         initrd_start = (unsigned long)start;
 303         initrd_end = initrd_start + size;
 304         printk("initrd moved to %p\n", start);
 305         return start;
 306 }
 307 #endif
 308
 309 #ifndef CONFIG_DISCONTIGMEM
 310 static void __init
 311 setup_memory(void *kernel_end)
 312 {
 313         struct memclust_struct * cluster;
 314         struct memdesc_struct * memdesc;
 315         unsigned long kernel_size;
 316         unsigned long i;
 317
 318         /* Find free clusters, and init and free the bootmem accordingly.  */
 319         memdesc = (struct memdesc_struct *)
 320           (hwrpb->mddt_offset + (unsigned long) hwrpb);
 321
 322         for_each_mem_cluster(memdesc, cluster, i) {
 323                 unsigned long end;
 324
 325                 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
 326                        i, cluster->usage, cluster->start_pfn,
 327                        cluster->start_pfn + cluster->numpages);
 328
 329                 /* Bit 0 is console/PALcode reserved.  Bit 1 is
 330                    non-volatile memory -- we might want to mark
 331                    this for later.  */
 332                 if (cluster->usage & 3)
 333                         continue;
 334
 335                 end = cluster->start_pfn + cluster->numpages;
 336                 if (end > max_low_pfn)
 337                         max_low_pfn = end;
 338
 339                 memblock_add(PFN_PHYS(cluster->start_pfn),
 340                              cluster->numpages << PAGE_SHIFT);
 341         }
 342
 343         /*
 344          * Except for the NUMA systems (wildfire, marvel) all of the
 345          * Alpha systems we run on support 32GB of memory or less.
 346          * Since the NUMA systems introduce large holes in memory addressing,
 347          * we can get into a situation where there is not enough contiguous
 348          * memory for the memory map.
 349          *
 350          * Limit memory to the first 32GB to limit the NUMA systems to
 351          * memory on their first node (wildfire) or 2 (marvel) to avoid
 352          * not being able to produce the memory map. In order to access
 353          * all of the memory on the NUMA systems, build with discontiguous
 354          * memory support.
 355          *
 356          * If the user specified a memory limit, let that memory limit stand.
 357          */
 358         if (!mem_size_limit)
 359                 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT;
 360
 361         if (mem_size_limit && max_low_pfn >= mem_size_limit)
 362         {
 363                 printk("setup: forcing memory size to %ldK (from %ldK).\n",
 364                        mem_size_limit << (PAGE_SHIFT - 10),
 365                        max_low_pfn    << (PAGE_SHIFT - 10));
 366                 max_low_pfn = mem_size_limit;
 367         }
 368
 369         /* Reserve the kernel memory. */
 370         kernel_size = virt_to_phys(kernel_end) - KERNEL_START_PHYS;
 371         memblock_reserve(KERNEL_START_PHYS, kernel_size);
 372
 373 #ifdef CONFIG_BLK_DEV_INITRD
 374         initrd_start = INITRD_START;
 375         if (initrd_start) {
 376                 initrd_end = initrd_start+INITRD_SIZE;
 377                 printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
 378                        (void *) initrd_start, INITRD_SIZE);
 379
 380                 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
 381                         if (!move_initrd(PFN_PHYS(max_low_pfn)))
 382                                 printk("initrd extends beyond end of memory "
 383                                        "(0x%08lx > 0x%p)\ndisabling initrd\n",
 384                                        initrd_end,
 385                                        phys_to_virt(PFN_PHYS(max_low_pfn)));
 386                 } else {
 387                         memblock_reserve(virt_to_phys((void *)initrd_start),
 388                                         INITRD_SIZE);
 389                 }
 390         }
 391 #endif /* CONFIG_BLK_DEV_INITRD */
 392 }
 393 #else
 394 extern void setup_memory(void *);
 395 #endif /* !CONFIG_DISCONTIGMEM */
 396
 397 int __init
 398 page_is_ram(unsigned long pfn)
 399 {
 400         struct memclust_struct * cluster;
 401         struct memdesc_struct * memdesc;
 402         unsigned long i;
 403
 404         memdesc = (struct memdesc_struct *)
 405                 (hwrpb->mddt_offset + (unsigned long) hwrpb);
 406         for_each_mem_cluster(memdesc, cluster, i)
 407         {
 408                 if (pfn >= cluster->start_pfn  &&
 409                     pfn < cluster->start_pfn + cluster->numpages) {
 410                         return (cluster->usage & 3) ? 0 : 1;
 411                 }
 412         }
 413
 414         return 0;
 415 }
 416
 417 static int __init
 418 register_cpus(void)
 419 {
 420         int i;
 421
 422         for_each_possible_cpu(i) {
 423                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
 424                 if (!p)
 425                         return -ENOMEM;
 426                 register_cpu(p, i);
 427         }
 428         return 0;
 429 }
 430
 431 arch_initcall(register_cpus);
 432
 433 void __init
 434 setup_arch(char **cmdline_p)
 435 {
 436         extern char _end[];
 437
 438         struct alpha_machine_vector *vec = NULL;
 439         struct percpu_struct *cpu;
 440         char *type_name, *var_name, *p;
 441         void *kernel_end = _end; /* end of kernel */
 442         char *args = command_line;
 443
 444         hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr);
 445         boot_cpuid = hard_smp_processor_id();
 446
 447         /*
 448          * Pre-process the system type to make sure it will be valid.
 449          *
 450          * This may restore real CABRIO and EB66+ family names, ie
 451          * EB64+ and EB66.
 452          *
 453          * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series)
 454          * and AS1200 (DIGITAL Server 5000 series) have the type as
 455          * the negative of the real one.
 456          */
 457         if ((long)hwrpb->sys_type < 0) {
 458                 hwrpb->sys_type = -((long)hwrpb->sys_type);
 459                 hwrpb_update_checksum(hwrpb);
 460         }
 461
 462         /* Register a call for panic conditions. */
 463         atomic_notifier_chain_register(&panic_notifier_list,
 464                         &alpha_panic_block);
 465
 466 #ifndef alpha_using_srm
 467         /* Assume that we've booted from SRM if we haven't booted from MILO.
 468            Detect the later by looking for "MILO" in the system serial nr.  */
 469         alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
 470 #endif
 471 #ifndef alpha_using_qemu
 472         /* Similarly, look for QEMU.  */
 473         alpha_using_qemu = strstr((const char *)hwrpb->ssn, "QEMU") != 0;
 474 #endif
 475
 476         /* If we are using SRM, we want to allow callbacks
 477            as early as possible, so do this NOW, and then
 478            they should work immediately thereafter.
 479         */
 480         kernel_end = callback_init(kernel_end);
 481
 482         /*
 483          * Locate the command line.
 484          */
 485         /* Hack for Jensen... since we're restricted to 8 or 16 chars for
 486            boot flags depending on the boot mode, we need some shorthand.
 487            This should do for installation.  */
 488         if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
 489                 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
 490         } else {
 491                 strlcpy(command_line, COMMAND_LINE, sizeof command_line);
 492         }
 493         strcpy(boot_command_line, command_line);
 494         *cmdline_p = command_line;
 495
 496         /*
 497          * Process command-line arguments.
 498          */
 499         while ((p = strsep(&args, " \t")) != NULL) {
 500                 if (!*p) continue;
 501                 if (strncmp(p, "alpha_mv=", 9) == 0) {
 502                         vec = get_sysvec_byname(p+9);
 503                         continue;
 504                 }
 505                 if (strncmp(p, "cycle=", 6) == 0) {
 506                         est_cycle_freq = simple_strtol(p+6, NULL, 0);
 507                         continue;
 508                 }
 509                 if (strncmp(p, "mem=", 4) == 0) {
 510                         mem_size_limit = get_mem_size_limit(p+4);
 511                         continue;
 512                 }
 513                 if (strncmp(p, "srmcons", 7) == 0) {
 514                         srmcons_output |= 1;
 515                         continue;
 516                 }
 517                 if (strncmp(p, "console=srm", 11) == 0) {
 518                         srmcons_output |= 2;
 519                         continue;
 520                 }
 521                 if (strncmp(p, "gartsize=", 9) == 0) {
 522                         alpha_agpgart_size =
 523                                 get_mem_size_limit(p+9) << PAGE_SHIFT;
 524                         continue;
 525                 }
 526 #ifdef CONFIG_VERBOSE_MCHECK
 527                 if (strncmp(p, "verbose_mcheck=", 15) == 0) {
 528                         alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0);
 529                         continue;
 530                 }
 531 #endif
 532         }
 533
 534         /* Replace the command line, now that we've killed it with strsep.  */
 535         strcpy(command_line, boot_command_line);
 536
 537         /* If we want SRM console printk echoing early, do it now. */
 538         if (alpha_using_srm && srmcons_output) {
 539                 register_srm_console();
 540
 541                 /*
 542                  * If "console=srm" was specified, clear the srmcons_output
 543                  * flag now so that time.c won't unregister_srm_console
 544                  */
 545                 if (srmcons_output & 2)
 546                         srmcons_output = 0;
 547         }
 548
 549 #ifdef CONFIG_MAGIC_SYSRQ
 550         /* If we're using SRM, make sysrq-b halt back to the prom,
 551            not auto-reboot.  */
 552         if (alpha_using_srm) {
 553                 struct sysrq_key_op *op = __sysrq_get_key_op('b');
 554                 op->handler = (void *) machine_halt;
 555         }
 556 #endif
 557
 558         /*
 559          * Identify and reconfigure for the current system.
 560          */
 561         cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
 562
 563         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
 564                      cpu->type, &type_name, &var_name);
 565         if (*var_name == '0')
 566                 var_name = "";
 567
 568         if (!vec) {
 569                 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation,
 570                                  cpu->type);
 571         }
 572
 573         if (!vec) {
 574                 panic("Unsupported system type: %s%s%s (%ld %ld)\n",
 575                       type_name, (*var_name ? " variation " : ""), var_name,
 576                       hwrpb->sys_type, hwrpb->sys_variation);
 577         }
 578         if (vec != &alpha_mv) {
 579                 alpha_mv = *vec;
 580         }
 581
 582         printk("Booting "
 583 #ifdef CONFIG_ALPHA_GENERIC
 584                "GENERIC "
 585 #endif
 586                "on %s%s%s using machine vector %s from %s\n",
 587                type_name, (*var_name ? " variation " : ""),
 588                var_name, alpha_mv.vector_name,
 589                (alpha_using_srm ? "SRM" : "MILO"));
 590
 591         printk("Major Options: "
 592 #ifdef CONFIG_SMP
 593                "SMP "
 594 #endif
 595 #ifdef CONFIG_ALPHA_EV56
 596                "EV56 "
 597 #endif
 598 #ifdef CONFIG_ALPHA_EV67
 599                "EV67 "
 600 #endif
 601 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
 602                "LEGACY_START "
 603 #endif
 604 #ifdef CONFIG_VERBOSE_MCHECK
 605                "VERBOSE_MCHECK "
 606 #endif
 607
 608 #ifdef CONFIG_DISCONTIGMEM
 609                "DISCONTIGMEM "
 610 #ifdef CONFIG_NUMA
 611                "NUMA "
 612 #endif
 613 #endif
 614
 615 #ifdef CONFIG_DEBUG_SPINLOCK
 616                "DEBUG_SPINLOCK "
 617 #endif
 618 #ifdef CONFIG_MAGIC_SYSRQ
 619                "MAGIC_SYSRQ "
 620 #endif
 621                "\n");
 622
 623         printk("Command line: %s\n", command_line);
 624
 625         /*
 626          * Sync up the HAE.
 627          * Save the SRM's current value for restoration.
 628          */
 629         srm_hae = *alpha_mv.hae_register;
 630         __set_hae(alpha_mv.hae_cache);
 631
 632         /* Reset enable correctable error reports.  */
 633         wrmces(0x7);
 634
 635         /* Find our memory.  */
 636         setup_memory(kernel_end);
 637         memblock_set_bottom_up(true);
 638
 639         /* First guess at cpu cache sizes.  Do this before init_arch.  */
 640         determine_cpu_caches(cpu->type);
 641
 642         /* Initialize the machine.  Usually has to do with setting up
 643            DMA windows and the like.  */
 644         if (alpha_mv.init_arch)
 645                 alpha_mv.init_arch();
 646
 647         /* Reserve standard resources.  */
 648         reserve_std_resources();
 649
 650         /*
 651          * Give us a default console.  TGA users will see nothing until
 652          * chr_dev_init is called, rather late in the boot sequence.
 653          */
 654
 655 #ifdef CONFIG_VT
 656 #if defined(CONFIG_VGA_CONSOLE)
 657         conswitchp = &vga_con;
 658 #elif defined(CONFIG_DUMMY_CONSOLE)
 659         conswitchp = &dummy_con;
 660 #endif
 661 #endif
 662
 663         /* Default root filesystem to sda2.  */
 664         ROOT_DEV = Root_SDA2;
 665
 666 #ifdef CONFIG_EISA
 667         /* FIXME:  only set this when we actually have EISA in this box? */
 668         EISA_bus = 1;
 669 #endif
 670
 671         /*
 672          * Check ASN in HWRPB for validity, report if bad.
 673          * FIXME: how was this failing?  Should we trust it instead,
 674          * and copy the value into alpha_mv.max_asn?
 675          */
 676
 677         if (hwrpb->max_asn != MAX_ASN) {
 678                 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn);
 679         }
 680
 681         /*
 682          * Identify the flock of penguins.
 683          */
 684
 685 #ifdef CONFIG_SMP
 686         setup_smp();
 687 #endif
 688         paging_init();
 689 }
 690
 691 static char sys_unknown[] = "Unknown";
 692 static char systype_names[][16] = {
 693         "0",
 694         "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen",
 695         "Pelican", "Morgan", "Sable", "Medulla", "Noname",
 696         "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind",
 697         "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1",
 698         "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake",
 699         "Cortex", "29", "Miata", "XXM", "Takara", "Yukon",
 700         "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel"
 701 };
 702
 703 static char unofficial_names[][8] = {"100", "Ruffian"};
 704
 705 static char api_names[][16] = {"200", "Nautilus"};
 706
 707 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"};
 708 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4};
 709
 710 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"};
 711 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2};
 712
 713 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"};
 714 static int eb64p_indices[] = {0,0,1,2};
 715
 716 static char eb66_names[][8] = {"EB66", "EB66+"};
 717 static int eb66_indices[] = {0,0,1};
 718
 719 static char marvel_names[][16] = {
 720         "Marvel/EV7"
 721 };
 722 static int marvel_indices[] = { 0 };
 723
 724 static char rawhide_names[][16] = {
 725         "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci"
 726 };
 727 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4};
 728
 729 static char titan_names[][16] = {
 730         "DEFAULT", "Privateer", "Falcon", "Granite"
 731 };
 732 static int titan_indices[] = {0,1,2,2,3};
 733
 734 static char tsunami_names[][16] = {
 735         "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper",
 736         "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne",
 737         "Flying Clipper", "Shark"
 738 };
 739 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12};
 740
 741 static struct alpha_machine_vector * __init
 742 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
 743 {
 744         static struct alpha_machine_vector *systype_vecs[] __initdata =
 745         {
 746                 NULL,           /* 0 */
 747                 NULL,           /* ADU */
 748                 NULL,           /* Cobra */
 749                 NULL,           /* Ruby */
 750                 NULL,           /* Flamingo */
 751                 NULL,           /* Mannequin */
 752                 &jensen_mv,
 753                 NULL,           /* Pelican */
 754                 NULL,           /* Morgan */
 755                 NULL,           /* Sable -- see below.  */
 756                 NULL,           /* Medulla */
 757                 &noname_mv,
 758                 NULL,           /* Turbolaser */
 759                 &avanti_mv,
 760                 NULL,           /* Mustang */
 761                 NULL,           /* Alcor, Bret, Maverick. HWRPB inaccurate? */
 762                 NULL,           /* Tradewind */
 763                 NULL,           /* Mikasa -- see below.  */
 764                 NULL,           /* EB64 */
 765                 NULL,           /* EB66 -- see variation.  */
 766                 NULL,           /* EB64+ -- see variation.  */
 767                 &alphabook1_mv,
 768                 &rawhide_mv,
 769                 NULL,           /* K2 */
 770                 &lynx_mv,       /* Lynx */
 771                 &xl_mv,
 772                 NULL,           /* EB164 -- see variation.  */
 773                 NULL,           /* Noritake -- see below.  */
 774                 NULL,           /* Cortex */
 775                 NULL,           /* 29 */
 776                 &miata_mv,
 777                 NULL,           /* XXM */
 778                 &takara_mv,
 779                 NULL,           /* Yukon */
 780                 NULL,           /* Tsunami -- see variation.  */
 781                 &wildfire_mv,   /* Wildfire */
 782                 NULL,           /* CUSCO */
 783                 &eiger_mv,      /* Eiger */
 784                 NULL,           /* Titan */
 785                 NULL,           /* Marvel */
 786         };
 787
 788         static struct alpha_machine_vector *unofficial_vecs[] __initdata =
 789         {
 790                 NULL,           /* 100 */
 791                 &ruffian_mv,
 792         };
 793
 794         static struct alpha_machine_vector *api_vecs[] __initdata =
 795         {
 796                 NULL,           /* 200 */
 797                 &nautilus_mv,
 798         };
 799
 800         static struct alpha_machine_vector *alcor_vecs[] __initdata =
 801         {
 802                 &alcor_mv, &xlt_mv, &xlt_mv
 803         };
 804
 805         static struct alpha_machine_vector *eb164_vecs[] __initdata =
 806         {
 807                 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv
 808         };
 809
 810         static struct alpha_machine_vector *eb64p_vecs[] __initdata =
 811         {
 812                 &eb64p_mv,
 813                 &cabriolet_mv,
 814                 &cabriolet_mv           /* AlphaPCI64 */
 815         };
 816
 817         static struct alpha_machine_vector *eb66_vecs[] __initdata =
 818         {
 819                 &eb66_mv,
 820                 &eb66p_mv
 821         };
 822
 823         static struct alpha_machine_vector *marvel_vecs[] __initdata =
 824         {
 825                 &marvel_ev7_mv,
 826         };
 827
 828         static struct alpha_machine_vector *titan_vecs[] __initdata =
 829         {
 830                 &titan_mv,              /* default   */
 831                 &privateer_mv,          /* privateer */
 832                 &titan_mv,              /* falcon    */
 833                 &privateer_mv,          /* granite   */
 834         };
 835
 836         static struct alpha_machine_vector *tsunami_vecs[]  __initdata =
 837         {
 838                 NULL,
 839                 &dp264_mv,              /* dp264 */
 840                 &dp264_mv,              /* warhol */
 841                 &dp264_mv,              /* windjammer */
 842                 &monet_mv,              /* monet */
 843                 &clipper_mv,            /* clipper */
 844                 &dp264_mv,              /* goldrush */
 845                 &webbrick_mv,           /* webbrick */
 846                 &dp264_mv,              /* catamaran */
 847                 NULL,                   /* brisbane? */
 848                 NULL,                   /* melbourne? */
 849                 NULL,                   /* flying clipper? */
 850                 &shark_mv,              /* shark */
 851         };
 852
 853         /* ??? Do we need to distinguish between Rawhides?  */
 854
 855         struct alpha_machine_vector *vec;
 856
 857         /* Search the system tables first... */
 858         vec = NULL;
 859         if (type < ARRAY_SIZE(systype_vecs)) {
 860                 vec = systype_vecs[type];
 861         } else if ((type > ST_API_BIAS) &&
 862                    (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
 863                 vec = api_vecs[type - ST_API_BIAS];
 864         } else if ((type > ST_UNOFFICIAL_BIAS) &&
 865                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
 866                 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
 867         }
 868
 869         /* If we've not found one, try for a variation.  */
 870
 871         if (!vec) {
 872                 /* Member ID is a bit-field. */
 873                 unsigned long member = (variation >> 10) & 0x3f;
 874
 875                 cpu &= 0xffffffff; /* make it usable */
 876
 877                 switch (type) {
 878                 case ST_DEC_ALCOR:
 879                         if (member < ARRAY_SIZE(alcor_indices))
 880                                 vec = alcor_vecs[alcor_indices[member]];
 881                         break;
 882                 case ST_DEC_EB164:
 883                         if (member < ARRAY_SIZE(eb164_indices))
 884                                 vec = eb164_vecs[eb164_indices[member]];
 885                         /* PC164 may show as EB164 variation with EV56 CPU,
 886                            but, since no true EB164 had anything but EV5... */
 887                         if (vec == &eb164_mv && cpu == EV56_CPU)
 888                                 vec = &pc164_mv;
 889                         break;
 890                 case ST_DEC_EB64P:
 891                         if (member < ARRAY_SIZE(eb64p_indices))
 892                                 vec = eb64p_vecs[eb64p_indices[member]];
 893                         break;
 894                 case ST_DEC_EB66:
 895                         if (member < ARRAY_SIZE(eb66_indices))
 896                                 vec = eb66_vecs[eb66_indices[member]];
 897                         break;
 898                 case ST_DEC_MARVEL:
 899                         if (member < ARRAY_SIZE(marvel_indices))
 900                                 vec = marvel_vecs[marvel_indices[member]];
 901                         break;
 902                 case ST_DEC_TITAN:
 903                         vec = titan_vecs[0];    /* default */
 904                         if (member < ARRAY_SIZE(titan_indices))
 905                                 vec = titan_vecs[titan_indices[member]];
 906                         break;
 907                 case ST_DEC_TSUNAMI:
 908                         if (member < ARRAY_SIZE(tsunami_indices))
 909                                 vec = tsunami_vecs[tsunami_indices[member]];
 910                         break;
 911                 case ST_DEC_1000:
 912                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 913                                 vec = &mikasa_primo_mv;
 914                         else
 915                                 vec = &mikasa_mv;
 916                         break;
 917                 case ST_DEC_NORITAKE:
 918                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 919                                 vec = &noritake_primo_mv;
 920                         else
 921                                 vec = &noritake_mv;
 922                         break;
 923                 case ST_DEC_2100_A500:
 924                         if (cpu == EV5_CPU || cpu == EV56_CPU)
 925                                 vec = &sable_gamma_mv;
 926                         else
 927                                 vec = &sable_mv;
 928                         break;
 929                 }
 930         }
 931         return vec;
 932 }
 933
 934 static struct alpha_machine_vector * __init
 935 get_sysvec_byname(const char *name)
 936 {
 937         static struct alpha_machine_vector *all_vecs[] __initdata =
 938         {
 939                 &alcor_mv,
 940                 &alphabook1_mv,
 941                 &avanti_mv,
 942                 &cabriolet_mv,
 943                 &clipper_mv,
 944                 &dp264_mv,
 945                 &eb164_mv,
 946                 &eb64p_mv,
 947                 &eb66_mv,
 948                 &eb66p_mv,
 949                 &eiger_mv,
 950                 &jensen_mv,
 951                 &lx164_mv,
 952                 &lynx_mv,
 953                 &miata_mv,
 954                 &mikasa_mv,
 955                 &mikasa_primo_mv,
 956                 &monet_mv,
 957                 &nautilus_mv,
 958                 &noname_mv,
 959                 &noritake_mv,
 960                 &noritake_primo_mv,
 961                 &p2k_mv,
 962                 &pc164_mv,
 963                 &privateer_mv,
 964                 &rawhide_mv,
 965                 &ruffian_mv,
 966                 &rx164_mv,
 967                 &sable_mv,
 968                 &sable_gamma_mv,
 969                 &shark_mv,
 970                 &sx164_mv,
 971                 &takara_mv,
 972                 &webbrick_mv,
 973                 &wildfire_mv,
 974                 &xl_mv,
 975                 &xlt_mv
 976         };
 977
 978         size_t i;
 979
 980         for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
 981                 struct alpha_machine_vector *mv = all_vecs[i];
 982                 if (strcasecmp(mv->vector_name, name) == 0)
 983                         return mv;
 984         }
 985         return NULL;
 986 }
 987
 988 static void
 989 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu,
 990              char **type_name, char **variation_name)
 991 {
 992         unsigned long member;
 993
 994         /* If not in the tables, make it UNKNOWN,
 995            else set type name to family */
 996         if (type < ARRAY_SIZE(systype_names)) {
 997                 *type_name = systype_names[type];
 998         } else if ((type > ST_API_BIAS) &&
 999                    (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
1000                 *type_name = api_names[type - ST_API_BIAS];
1001         } else if ((type > ST_UNOFFICIAL_BIAS) &&
1002                    (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
1003                 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
1004         } else {
1005                 *type_name = sys_unknown;
1006                 *variation_name = sys_unknown;
1007                 return;
1008         }
1009
1010         /* Set variation to "0"; if variation is zero, done.  */
1011         *variation_name = systype_names[0];
1012         if (variation == 0) {
1013                 return;
1014         }
1015
1016         member = (variation >> 10) & 0x3f; /* member ID is a bit-field */
1017
1018         cpu &= 0xffffffff; /* make it usable */
1019
1020         switch (type) { /* select by family */
1021         default: /* default to variation "0" for now */
1022                 break;
1023         case ST_DEC_EB164:
1024                 if (member >= ARRAY_SIZE(eb164_indices))
1025                         break;
1026                 *variation_name = eb164_names[eb164_indices[member]];
1027                 /* PC164 may show as EB164 variation, but with EV56 CPU,
1028                    so, since no true EB164 had anything but EV5... */
1029                 if (eb164_indices[member] == 0 && cpu == EV56_CPU)
1030                         *variation_name = eb164_names[1]; /* make it PC164 */
1031                 break;
1032         case ST_DEC_ALCOR:
1033                 if (member < ARRAY_SIZE(alcor_indices))
1034                         *variation_name = alcor_names[alcor_indices[member]];
1035                 break;
1036         case ST_DEC_EB64P:
1037                 if (member < ARRAY_SIZE(eb64p_indices))
1038                         *variation_name = eb64p_names[eb64p_indices[member]];
1039                 break;
1040         case ST_DEC_EB66:
1041                 if (member < ARRAY_SIZE(eb66_indices))
1042                         *variation_name = eb66_names[eb66_indices[member]];
1043                 break;
1044         case ST_DEC_MARVEL:
1045                 if (member < ARRAY_SIZE(marvel_indices))
1046                         *variation_name = marvel_names[marvel_indices[member]];
1047                 break;
1048         case ST_DEC_RAWHIDE:
1049                 if (member < ARRAY_SIZE(rawhide_indices))
1050                         *variation_name = rawhide_names[rawhide_indices[member]];
1051                 break;
1052         case ST_DEC_TITAN:
1053                 *variation_name = titan_names[0];       /* default */
1054                 if (member < ARRAY_SIZE(titan_indices))
1055                         *variation_name = titan_names[titan_indices[member]];
1056                 break;
1057         case ST_DEC_TSUNAMI:
1058                 if (member < ARRAY_SIZE(tsunami_indices))
1059                         *variation_name = tsunami_names[tsunami_indices[member]];
1060                 break;
1061         }
1062 }
1063
1064 /*
1065  * A change was made to the HWRPB via an ECO and the following code
1066  * tracks a part of the ECO.  In HWRPB versions less than 5, the ECO
1067  * was not implemented in the console firmware.  If it's revision 5 or
1068  * greater we can get the name of the platform as an ASCII string from
1069  * the HWRPB.  That's what this function does.  It checks the revision
1070  * level and if the string is in the HWRPB it returns the address of
1071  * the string--a pointer to the name of the platform.
1072  *
1073  * Returns:
1074  *      - Pointer to a ASCII string if it's in the HWRPB
1075  *      - Pointer to a blank string if the data is not in the HWRPB.
1076  */
1077
1078 static char *
1079 platform_string(void)
1080 {
1081         struct dsr_struct *dsr;
1082         static char unk_system_string[] = "N/A";
1083
1084         /* Go to the console for the string pointer.
1085          * If the rpb_vers is not 5 or greater the rpb
1086          * is old and does not have this data in it.
1087          */
1088         if (hwrpb->revision < 5)
1089                 return (unk_system_string);
1090         else {
1091                 /* The Dynamic System Recognition struct
1092                  * has the system platform name starting
1093                  * after the character count of the string.
1094                  */
1095                 dsr =  ((struct dsr_struct *)
1096                         ((char *)hwrpb + hwrpb->dsr_offset));
1097                 return ((char *)dsr + (dsr->sysname_off +
1098                                        sizeof(long)));
1099         }
1100 }
1101
1102 static int
1103 get_nr_processors(struct percpu_struct *cpubase, unsigned long num)
1104 {
1105         struct percpu_struct *cpu;
1106         unsigned long i;
1107         int count = 0;
1108
1109         for (i = 0; i < num; i++) {
1110                 cpu = (struct percpu_struct *)
1111                         ((char *)cpubase + i*hwrpb->processor_size);
1112                 if ((cpu->flags & 0x1cc) == 0x1cc)
1113                         count++;
1114         }
1115         return count;
1116 }
1117
1118 static void
1119 show_cache_size (struct seq_file *f, const char *which, int shape)
1120 {
1121         if (shape == -1)
1122                 seq_printf (f, "%s\t\t: n/a\n", which);
1123         else if (shape == 0)
1124                 seq_printf (f, "%s\t\t: unknown\n", which);
1125         else
1126                 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n",
1127                             which, shape >> 10, shape & 15,
1128                             1 << ((shape >> 4) & 15));
1129 }
1130
1131 static int
1132 show_cpuinfo(struct seq_file *f, void *slot)
1133 {
1134         extern struct unaligned_stat {
1135                 unsigned long count, va, pc;
1136         } unaligned[2];
1137
1138         static char cpu_names[][8] = {
1139                 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
1140                 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL",
1141                 "EV68CX", "EV7", "EV79", "EV69"
1142         };
1143
1144         struct percpu_struct *cpu = slot;
1145         unsigned int cpu_index;
1146         char *cpu_name;
1147         char *systype_name;
1148         char *sysvariation_name;
1149         int nr_processors;
1150         unsigned long timer_freq;
1151
1152         cpu_index = (unsigned) (cpu->type - 1);
1153         cpu_name = "Unknown";
1154         if (cpu_index < ARRAY_SIZE(cpu_names))
1155                 cpu_name = cpu_names[cpu_index];
1156
1157         get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,
1158                      cpu->type, &systype_name, &sysvariation_name);
1159
1160         nr_processors = get_nr_processors(cpu, hwrpb->nr_processors);
1161
1162 #if CONFIG_HZ == 1024 || CONFIG_HZ == 1200
1163         timer_freq = (100UL * hwrpb->intr_freq) / 4096;
1164 #else
1165         timer_freq = 100UL * CONFIG_HZ;
1166 #endif
1167
1168         seq_printf(f, "cpu\t\t\t: Alpha\n"
1169                       "cpu model\t\t: %s\n"
1170                       "cpu variation\t\t: %ld\n"
1171                       "cpu revision\t\t: %ld\n"
1172                       "cpu serial number\t: %s\n"
1173                       "system type\t\t: %s\n"
1174                       "system variation\t: %s\n"
1175                       "system revision\t\t: %ld\n"
1176                       "system serial number\t: %s\n"
1177                       "cycle frequency [Hz]\t: %lu %s\n"
1178                       "timer frequency [Hz]\t: %lu.%02lu\n"
1179                       "page size [bytes]\t: %ld\n"
1180                       "phys. address bits\t: %ld\n"
1181                       "max. addr. space #\t: %ld\n"
1182                       "BogoMIPS\t\t: %lu.%02lu\n"
1183                       "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1184                       "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
1185                       "platform string\t\t: %s\n"
1186                       "cpus detected\t\t: %d\n",
1187                        cpu_name, cpu->variation, cpu->revision,
1188                        (char*)cpu->serial_no,
1189                        systype_name, sysvariation_name, hwrpb->sys_revision,
1190                        (char*)hwrpb->ssn,
1191                        est_cycle_freq ? : hwrpb->cycle_freq,
1192                        est_cycle_freq ? "est." : "",
1193                        timer_freq / 100, timer_freq % 100,
1194                        hwrpb->pagesize,
1195                        hwrpb->pa_bits,
1196                        hwrpb->max_asn,
1197                        loops_per_jiffy / (500000/HZ),
1198                        (loops_per_jiffy / (5000/HZ)) % 100,
1199                        unaligned[0].count, unaligned[0].pc, unaligned[0].va,
1200                        unaligned[1].count, unaligned[1].pc, unaligned[1].va,
1201                        platform_string(), nr_processors);
1202
1203 #ifdef CONFIG_SMP
1204         seq_printf(f, "cpus active\t\t: %u\n"
1205                       "cpu active mask\t\t: %016lx\n",
1206                        num_online_cpus(), cpumask_bits(cpu_possible_mask)[0]);
1207 #endif
1208
1209         show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape);
1210         show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape);
1211         show_cache_size (f, "L2 cache", alpha_l2_cacheshape);
1212         show_cache_size (f, "L3 cache", alpha_l3_cacheshape);
1213
1214         return 0;
1215 }
1216
1217 static int __init
1218 read_mem_block(int *addr, int stride, int size)
1219 {
1220         long nloads = size / stride, cnt, tmp;
1221
1222         __asm__ __volatile__(
1223         "       rpcc    %0\n"
1224         "1:     ldl     %3,0(%2)\n"
1225         "       subq    %1,1,%1\n"
1226         /* Next two XORs introduce an explicit data dependency between
1227            consecutive loads in the loop, which will give us true load
1228            latency. */
1229         "       xor     %3,%2,%2\n"
1230         "       xor     %3,%2,%2\n"
1231         "       addq    %2,%4,%2\n"
1232         "       bne     %1,1b\n"
1233         "       rpcc    %3\n"
1234         "       subl    %3,%0,%0\n"
1235         : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp)
1236         : "r" (stride), "1" (nloads), "2" (addr));
1237
1238         return cnt / (size / stride);
1239 }
1240
1241 #define CSHAPE(totalsize, linesize, assoc) \
1242   ((totalsize & ~0xff) | (linesize << 4) | assoc)
1243
1244 /* ??? EV5 supports up to 64M, but did the systems with more than
1245    16M of BCACHE ever exist? */
1246 #define MAX_BCACHE_SIZE 16*1024*1024
1247
1248 /* Note that the offchip caches are direct mapped on all Alphas. */
1249 static int __init
1250 external_cache_probe(int minsize, int width)
1251 {
1252         int cycles, prev_cycles = 1000000;
1253         int stride = 1 << width;
1254         long size = minsize, maxsize = MAX_BCACHE_SIZE * 2;
1255
1256         if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT)
1257                 maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT);
1258
1259         /* Get the first block cached. */
1260         read_mem_block(__va(0), stride, size);
1261
1262         while (size < maxsize) {
1263                 /* Get an average load latency in cycles. */
1264                 cycles = read_mem_block(__va(0), stride, size);
1265                 if (cycles > prev_cycles * 2) {
1266                         /* Fine, we exceed the cache. */
1267                         printk("%ldK Bcache detected; load hit latency %d "
1268                                "cycles, load miss latency %d cycles\n",
1269                                size >> 11, prev_cycles, cycles);
1270                         return CSHAPE(size >> 1, width, 1);
1271                 }
1272                 /* Try to get the next block cached. */
1273                 read_mem_block(__va(size), stride, size);
1274                 prev_cycles = cycles;
1275                 size <<= 1;
1276         }
1277         return -1;      /* No BCACHE found. */
1278 }
1279
1280 static void __init
1281 determine_cpu_caches (unsigned int cpu_type)
1282 {
1283         int L1I, L1D, L2, L3;
1284
1285         switch (cpu_type) {
1286         case EV4_CPU:
1287         case EV45_CPU:
1288           {
1289                 if (cpu_type == EV4_CPU)
1290                         L1I = CSHAPE(8*1024, 5, 1);
1291                 else
1292                         L1I = CSHAPE(16*1024, 5, 1);
1293                 L1D = L1I;
1294                 L3 = -1;
1295
1296                 /* BIU_CTL is a write-only Abox register.  PALcode has a
1297                    shadow copy, and may be available from some versions
1298                    of the CSERVE PALcall.  If we can get it, then
1299
1300                         unsigned long biu_ctl, size;
1301                         size = 128*1024 * (1 << ((biu_ctl >> 28) & 7));
1302                         L2 = CSHAPE (size, 5, 1);
1303
1304                    Unfortunately, we can't rely on that.
1305                 */
1306                 L2 = external_cache_probe(128*1024, 5);
1307                 break;
1308           }
1309
1310         case LCA4_CPU:
1311           {
1312                 unsigned long car, size;
1313
1314                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1315                 L3 = -1;
1316
1317                 car = *(vuip) phys_to_virt (0x120000078UL);
1318                 size = 64*1024 * (1 << ((car >> 5) & 7));
1319                 /* No typo -- 8 byte cacheline size.  Whodathunk.  */
1320                 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1);
1321                 break;
1322           }
1323
1324         case EV5_CPU:
1325         case EV56_CPU:
1326           {
1327                 unsigned long sc_ctl, width;
1328
1329                 L1I = L1D = CSHAPE(8*1024, 5, 1);
1330
1331                 /* Check the line size of the Scache.  */
1332                 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL);
1333                 width = sc_ctl & 0x1000 ? 6 : 5;
1334                 L2 = CSHAPE (96*1024, width, 3);
1335
1336                 /* BC_CONTROL and BC_CONFIG are write-only IPRs.  PALcode
1337                    has a shadow copy, and may be available from some versions
1338                    of the CSERVE PALcall.  If we can get it, then
1339
1340                         unsigned long bc_control, bc_config, size;
1341                         size = 1024*1024 * (1 << ((bc_config & 7) - 1));
1342                         L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1);
1343
1344                    Unfortunately, we can't rely on that.
1345                 */
1346                 L3 = external_cache_probe(1024*1024, width);
1347                 break;
1348           }
1349
1350         case PCA56_CPU:
1351         case PCA57_CPU:
1352           {
1353                 if (cpu_type == PCA56_CPU) {
1354                         L1I = CSHAPE(16*1024, 6, 1);
1355                         L1D = CSHAPE(8*1024, 5, 1);
1356                 } else {
1357                         L1I = CSHAPE(32*1024, 6, 2);
1358                         L1D = CSHAPE(16*1024, 5, 1);
1359                 }
1360                 L3 = -1;
1361
1362 #if 0
1363                 unsigned long cbox_config, size;
1364
1365                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
1366                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
1367
1368                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
1369 #else
1370                 L2 = external_cache_probe(512*1024, 6);
1371 #endif
1372                 break;
1373           }
1374
1375         case EV6_CPU:
1376         case EV67_CPU:
1377         case EV68CB_CPU:
1378         case EV68AL_CPU:
1379         case EV68CX_CPU:
1380         case EV69_CPU:
1381                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1382                 L2 = external_cache_probe(1024*1024, 6);
1383                 L3 = -1;
1384                 break;
1385
1386         case EV7_CPU:
1387         case EV79_CPU:
1388                 L1I = L1D = CSHAPE(64*1024, 6, 2);
1389                 L2 = CSHAPE(7*1024*1024/4, 6, 7);
1390                 L3 = -1;
1391                 break;
1392
1393         default:
1394                 /* Nothing known about this cpu type.  */
1395                 L1I = L1D = L2 = L3 = 0;
1396                 break;
1397         }
1398
1399         alpha_l1i_cacheshape = L1I;
1400         alpha_l1d_cacheshape = L1D;
1401         alpha_l2_cacheshape = L2;
1402         alpha_l3_cacheshape = L3;
1403 }
1404
1405 /*
1406  * We show only CPU #0 info.
1407  */
1408 static void *
1409 c_start(struct seq_file *f, loff_t *pos)
1410 {
1411         return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset;
1412 }
1413
1414 static void *
1415 c_next(struct seq_file *f, void *v, loff_t *pos)
1416 {
1417         return NULL;
1418 }
1419
1420 static void
1421 c_stop(struct seq_file *f, void *v)
1422 {
1423 }
1424
1425 const struct seq_operations cpuinfo_op = {
1426         .start  = c_start,
1427         .next   = c_next,
1428         .stop   = c_stop,
1429         .show   = show_cpuinfo,
1430 };
1431
1432
1433 static int
1434 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1435 {
1436 #if 1
1437         /* FIXME FIXME FIXME */
1438         /* If we are using SRM and serial console, just hard halt here. */
1439         if (alpha_using_srm && srmcons_output)
1440                 __halt();
1441 #endif
1442         return NOTIFY_DONE;
1443 }
1444
1445 static __init int add_pcspkr(void)
1446 {
1447         struct platform_device *pd;
1448         int ret;
1449
1450         pd = platform_device_alloc("pcspkr", -1);
1451         if (!pd)
1452                 return -ENOMEM;
1453
1454         ret = platform_device_add(pd);
1455         if (ret)
1456                 platform_device_put(pd);
1457
1458         return ret;
1459 }
1460 device_initcall(add_pcspkr);