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/screen_info.h> 22 #include <linux/delay.h> 23 #include <linux/mc146818rtc.h> 24 #include <linux/console.h> 25 #include <linux/cpu.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/string.h> 29 #include <linux/ioport.h> 30 #include <linux/platform_device.h> 31 #include <linux/bootmem.h> 32 #include <linux/pci.h> 33 #include <linux/seq_file.h> 34 #include <linux/root_dev.h> 35 #include <linux/initrd.h> 36 #include <linux/eisa.h> 37 #include <linux/pfn.h> 38 #ifdef CONFIG_MAGIC_SYSRQ 39 #include <linux/sysrq.h> 40 #include <linux/reboot.h> 41 #endif 42 #include <linux/notifier.h> 43 #include <asm/setup.h> 44 #include <asm/io.h> 45 #include <linux/log2.h> 46 #include <linux/export.h> 47 48 extern struct atomic_notifier_head panic_notifier_list; 49 static int alpha_panic_event(struct notifier_block *, unsigned long, void *); 50 static struct notifier_block alpha_panic_block = { 51 alpha_panic_event, 52 NULL, 53 INT_MAX /* try to do it first */ 54 }; 55 56 #include <linux/uaccess.h> 57 #include <asm/pgtable.h> 58 #include <asm/hwrpb.h> 59 #include <asm/dma.h> 60 #include <asm/mmu_context.h> 61 #include <asm/console.h> 62 63 #include "proto.h" 64 #include "pci_impl.h" 65 66 67 struct hwrpb_struct *hwrpb; 68 EXPORT_SYMBOL(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 #ifdef CONFIG_NUMA 83 struct cpumask node_to_cpumask_map[MAX_NUMNODES] __read_mostly; 84 EXPORT_SYMBOL(node_to_cpumask_map); 85 #endif 86 87 /* Which processor we booted from. */ 88 int boot_cpuid; 89 90 /* 91 * Using SRM callbacks for initial console output. This works from 92 * setup_arch() time through the end of time_init(), as those places 93 * are under our (Alpha) control. 94 95 * "srmcons" specified in the boot command arguments allows us to 96 * see kernel messages during the period of time before the true 97 * console device is "registered" during console_init(). 98 * As of this version (2.5.59), console_init() will call 99 * disable_early_printk() as the last action before initializing 100 * the console drivers. That's the last possible time srmcons can be 101 * unregistered without interfering with console behavior. 102 * 103 * By default, OFF; set it with a bootcommand arg of "srmcons" or 104 * "console=srm". The meaning of these two args is: 105 * "srmcons" - early callback prints 106 * "console=srm" - full callback based console, including early prints 107 */ 108 int srmcons_output = 0; 109 110 /* Enforce a memory size limit; useful for testing. By default, none. */ 111 unsigned long mem_size_limit = 0; 112 113 /* Set AGP GART window size (0 means disabled). */ 114 unsigned long alpha_agpgart_size = DEFAULT_AGP_APER_SIZE; 115 116 #ifdef CONFIG_ALPHA_GENERIC 117 struct alpha_machine_vector alpha_mv; 118 EXPORT_SYMBOL(alpha_mv); 119 #endif 120 121 #ifndef alpha_using_srm 122 int alpha_using_srm; 123 EXPORT_SYMBOL(alpha_using_srm); 124 #endif 125 126 #ifndef alpha_using_qemu 127 int alpha_using_qemu; 128 #endif 129 130 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long, 131 unsigned long); 132 static struct alpha_machine_vector *get_sysvec_byname(const char *); 133 static void get_sysnames(unsigned long, unsigned long, unsigned long, 134 char **, char **); 135 static void determine_cpu_caches (unsigned int); 136 137 static char __initdata command_line[COMMAND_LINE_SIZE]; 138 139 /* 140 * The format of "screen_info" is strange, and due to early 141 * i386-setup code. This is just enough to make the console 142 * code think we're on a VGA color display. 143 */ 144 145 struct screen_info screen_info = { 146 .orig_x = 0, 147 .orig_y = 25, 148 .orig_video_cols = 80, 149 .orig_video_lines = 25, 150 .orig_video_isVGA = 1, 151 .orig_video_points = 16 152 }; 153 154 EXPORT_SYMBOL(screen_info); 155 156 /* 157 * The direct map I/O window, if any. This should be the same 158 * for all busses, since it's used by virt_to_bus. 159 */ 160 161 unsigned long __direct_map_base; 162 unsigned long __direct_map_size; 163 EXPORT_SYMBOL(__direct_map_base); 164 EXPORT_SYMBOL(__direct_map_size); 165 166 /* 167 * Declare all of the machine vectors. 168 */ 169 170 /* GCC 2.7.2 (on alpha at least) is lame. It does not support either 171 __attribute__((weak)) or #pragma weak. Bypass it and talk directly 172 to the assembler. */ 173 174 #define WEAK(X) \ 175 extern struct alpha_machine_vector X; \ 176 asm(".weak "#X) 177 178 WEAK(alcor_mv); 179 WEAK(alphabook1_mv); 180 WEAK(avanti_mv); 181 WEAK(cabriolet_mv); 182 WEAK(clipper_mv); 183 WEAK(dp264_mv); 184 WEAK(eb164_mv); 185 WEAK(eb64p_mv); 186 WEAK(eb66_mv); 187 WEAK(eb66p_mv); 188 WEAK(eiger_mv); 189 WEAK(jensen_mv); 190 WEAK(lx164_mv); 191 WEAK(lynx_mv); 192 WEAK(marvel_ev7_mv); 193 WEAK(miata_mv); 194 WEAK(mikasa_mv); 195 WEAK(mikasa_primo_mv); 196 WEAK(monet_mv); 197 WEAK(nautilus_mv); 198 WEAK(noname_mv); 199 WEAK(noritake_mv); 200 WEAK(noritake_primo_mv); 201 WEAK(p2k_mv); 202 WEAK(pc164_mv); 203 WEAK(privateer_mv); 204 WEAK(rawhide_mv); 205 WEAK(ruffian_mv); 206 WEAK(rx164_mv); 207 WEAK(sable_mv); 208 WEAK(sable_gamma_mv); 209 WEAK(shark_mv); 210 WEAK(sx164_mv); 211 WEAK(takara_mv); 212 WEAK(titan_mv); 213 WEAK(webbrick_mv); 214 WEAK(wildfire_mv); 215 WEAK(xl_mv); 216 WEAK(xlt_mv); 217 218 #undef WEAK 219 220 /* 221 * I/O resources inherited from PeeCees. Except for perhaps the 222 * turbochannel alphas, everyone has these on some sort of SuperIO chip. 223 * 224 * ??? If this becomes less standard, move the struct out into the 225 * machine vector. 226 */ 227 228 static void __init 229 reserve_std_resources(void) 230 { 231 static struct resource standard_io_resources[] = { 232 { .name = "rtc", .start = -1, .end = -1 }, 233 { .name = "dma1", .start = 0x00, .end = 0x1f }, 234 { .name = "pic1", .start = 0x20, .end = 0x3f }, 235 { .name = "timer", .start = 0x40, .end = 0x5f }, 236 { .name = "keyboard", .start = 0x60, .end = 0x6f }, 237 { .name = "dma page reg", .start = 0x80, .end = 0x8f }, 238 { .name = "pic2", .start = 0xa0, .end = 0xbf }, 239 { .name = "dma2", .start = 0xc0, .end = 0xdf }, 240 }; 241 242 struct resource *io = &ioport_resource; 243 size_t i; 244 245 if (hose_head) { 246 struct pci_controller *hose; 247 for (hose = hose_head; hose; hose = hose->next) 248 if (hose->index == 0) { 249 io = hose->io_space; 250 break; 251 } 252 } 253 254 /* Fix up for the Jensen's queer RTC placement. */ 255 standard_io_resources[0].start = RTC_PORT(0); 256 standard_io_resources[0].end = RTC_PORT(0) + 0x10; 257 258 for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i) 259 request_resource(io, standard_io_resources+i); 260 } 261 262 #define PFN_MAX PFN_DOWN(0x80000000) 263 #define for_each_mem_cluster(memdesc, _cluster, i) \ 264 for ((_cluster) = (memdesc)->cluster, (i) = 0; \ 265 (i) < (memdesc)->numclusters; (i)++, (_cluster)++) 266 267 static unsigned long __init 268 get_mem_size_limit(char *s) 269 { 270 unsigned long end = 0; 271 char *from = s; 272 273 end = simple_strtoul(from, &from, 0); 274 if ( *from == 'K' || *from == 'k' ) { 275 end = end << 10; 276 from++; 277 } else if ( *from == 'M' || *from == 'm' ) { 278 end = end << 20; 279 from++; 280 } else if ( *from == 'G' || *from == 'g' ) { 281 end = end << 30; 282 from++; 283 } 284 return end >> PAGE_SHIFT; /* Return the PFN of the limit. */ 285 } 286 287 #ifdef CONFIG_BLK_DEV_INITRD 288 void * __init 289 move_initrd(unsigned long mem_limit) 290 { 291 void *start; 292 unsigned long size; 293 294 size = initrd_end - initrd_start; 295 start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0); 296 if (!start || __pa(start) + size > mem_limit) { 297 initrd_start = initrd_end = 0; 298 return NULL; 299 } 300 memmove(start, (void *)initrd_start, size); 301 initrd_start = (unsigned long)start; 302 initrd_end = initrd_start + size; 303 printk("initrd moved to %p\n", start); 304 return start; 305 } 306 #endif 307 308 #ifndef CONFIG_DISCONTIGMEM 309 static void __init 310 setup_memory(void *kernel_end) 311 { 312 struct memclust_struct * cluster; 313 struct memdesc_struct * memdesc; 314 unsigned long start_kernel_pfn, end_kernel_pfn; 315 unsigned long bootmap_size, bootmap_pages, bootmap_start; 316 unsigned long start, end; 317 unsigned long i; 318 319 /* Find free clusters, and init and free the bootmem accordingly. */ 320 memdesc = (struct memdesc_struct *) 321 (hwrpb->mddt_offset + (unsigned long) hwrpb); 322 323 for_each_mem_cluster(memdesc, cluster, i) { 324 printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n", 325 i, cluster->usage, cluster->start_pfn, 326 cluster->start_pfn + cluster->numpages); 327 328 /* Bit 0 is console/PALcode reserved. Bit 1 is 329 non-volatile memory -- we might want to mark 330 this for later. */ 331 if (cluster->usage & 3) 332 continue; 333 334 end = cluster->start_pfn + cluster->numpages; 335 if (end > max_low_pfn) 336 max_low_pfn = end; 337 } 338 339 /* 340 * Except for the NUMA systems (wildfire, marvel) all of the 341 * Alpha systems we run on support 32GB of memory or less. 342 * Since the NUMA systems introduce large holes in memory addressing, 343 * we can get into a situation where there is not enough contiguous 344 * memory for the memory map. 345 * 346 * Limit memory to the first 32GB to limit the NUMA systems to 347 * memory on their first node (wildfire) or 2 (marvel) to avoid 348 * not being able to produce the memory map. In order to access 349 * all of the memory on the NUMA systems, build with discontiguous 350 * memory support. 351 * 352 * If the user specified a memory limit, let that memory limit stand. 353 */ 354 if (!mem_size_limit) 355 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT; 356 357 if (mem_size_limit && max_low_pfn >= mem_size_limit) 358 { 359 printk("setup: forcing memory size to %ldK (from %ldK).\n", 360 mem_size_limit << (PAGE_SHIFT - 10), 361 max_low_pfn << (PAGE_SHIFT - 10)); 362 max_low_pfn = mem_size_limit; 363 } 364 365 /* Find the bounds of kernel memory. */ 366 start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS); 367 end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end)); 368 bootmap_start = -1; 369 370 try_again: 371 if (max_low_pfn <= end_kernel_pfn) 372 panic("not enough memory to boot"); 373 374 /* We need to know how many physically contiguous pages 375 we'll need for the bootmap. */ 376 bootmap_pages = bootmem_bootmap_pages(max_low_pfn); 377 378 /* Now find a good region where to allocate the bootmap. */ 379 for_each_mem_cluster(memdesc, cluster, i) { 380 if (cluster->usage & 3) 381 continue; 382 383 start = cluster->start_pfn; 384 end = start + cluster->numpages; 385 if (start >= max_low_pfn) 386 continue; 387 if (end > max_low_pfn) 388 end = max_low_pfn; 389 if (start < start_kernel_pfn) { 390 if (end > end_kernel_pfn 391 && end - end_kernel_pfn >= bootmap_pages) { 392 bootmap_start = end_kernel_pfn; 393 break; 394 } else if (end > start_kernel_pfn) 395 end = start_kernel_pfn; 396 } else if (start < end_kernel_pfn) 397 start = end_kernel_pfn; 398 if (end - start >= bootmap_pages) { 399 bootmap_start = start; 400 break; 401 } 402 } 403 404 if (bootmap_start == ~0UL) { 405 max_low_pfn >>= 1; 406 goto try_again; 407 } 408 409 /* Allocate the bootmap and mark the whole MM as reserved. */ 410 bootmap_size = init_bootmem(bootmap_start, max_low_pfn); 411 412 /* Mark the free regions. */ 413 for_each_mem_cluster(memdesc, cluster, i) { 414 if (cluster->usage & 3) 415 continue; 416 417 start = cluster->start_pfn; 418 end = cluster->start_pfn + cluster->numpages; 419 if (start >= max_low_pfn) 420 continue; 421 if (end > max_low_pfn) 422 end = max_low_pfn; 423 if (start < start_kernel_pfn) { 424 if (end > end_kernel_pfn) { 425 free_bootmem(PFN_PHYS(start), 426 (PFN_PHYS(start_kernel_pfn) 427 - PFN_PHYS(start))); 428 printk("freeing pages %ld:%ld\n", 429 start, start_kernel_pfn); 430 start = end_kernel_pfn; 431 } else if (end > start_kernel_pfn) 432 end = start_kernel_pfn; 433 } else if (start < end_kernel_pfn) 434 start = end_kernel_pfn; 435 if (start >= end) 436 continue; 437 438 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start)); 439 printk("freeing pages %ld:%ld\n", start, end); 440 } 441 442 /* Reserve the bootmap memory. */ 443 reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size, 444 BOOTMEM_DEFAULT); 445 printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size)); 446 447 #ifdef CONFIG_BLK_DEV_INITRD 448 initrd_start = INITRD_START; 449 if (initrd_start) { 450 initrd_end = initrd_start+INITRD_SIZE; 451 printk("Initial ramdisk at: 0x%p (%lu bytes)\n", 452 (void *) initrd_start, INITRD_SIZE); 453 454 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) { 455 if (!move_initrd(PFN_PHYS(max_low_pfn))) 456 printk("initrd extends beyond end of memory " 457 "(0x%08lx > 0x%p)\ndisabling initrd\n", 458 initrd_end, 459 phys_to_virt(PFN_PHYS(max_low_pfn))); 460 } else { 461 reserve_bootmem(virt_to_phys((void *)initrd_start), 462 INITRD_SIZE, BOOTMEM_DEFAULT); 463 } 464 } 465 #endif /* CONFIG_BLK_DEV_INITRD */ 466 } 467 #else 468 extern void setup_memory(void *); 469 #endif /* !CONFIG_DISCONTIGMEM */ 470 471 int __init 472 page_is_ram(unsigned long pfn) 473 { 474 struct memclust_struct * cluster; 475 struct memdesc_struct * memdesc; 476 unsigned long i; 477 478 memdesc = (struct memdesc_struct *) 479 (hwrpb->mddt_offset + (unsigned long) hwrpb); 480 for_each_mem_cluster(memdesc, cluster, i) 481 { 482 if (pfn >= cluster->start_pfn && 483 pfn < cluster->start_pfn + cluster->numpages) { 484 return (cluster->usage & 3) ? 0 : 1; 485 } 486 } 487 488 return 0; 489 } 490 491 static int __init 492 register_cpus(void) 493 { 494 int i; 495 496 for_each_possible_cpu(i) { 497 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); 498 if (!p) 499 return -ENOMEM; 500 register_cpu(p, i); 501 } 502 return 0; 503 } 504 505 arch_initcall(register_cpus); 506 507 void __init 508 setup_arch(char **cmdline_p) 509 { 510 extern char _end[]; 511 512 struct alpha_machine_vector *vec = NULL; 513 struct percpu_struct *cpu; 514 char *type_name, *var_name, *p; 515 void *kernel_end = _end; /* end of kernel */ 516 char *args = command_line; 517 518 hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr); 519 boot_cpuid = hard_smp_processor_id(); 520 521 /* 522 * Pre-process the system type to make sure it will be valid. 523 * 524 * This may restore real CABRIO and EB66+ family names, ie 525 * EB64+ and EB66. 526 * 527 * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series) 528 * and AS1200 (DIGITAL Server 5000 series) have the type as 529 * the negative of the real one. 530 */ 531 if ((long)hwrpb->sys_type < 0) { 532 hwrpb->sys_type = -((long)hwrpb->sys_type); 533 hwrpb_update_checksum(hwrpb); 534 } 535 536 /* Register a call for panic conditions. */ 537 atomic_notifier_chain_register(&panic_notifier_list, 538 &alpha_panic_block); 539 540 #ifndef alpha_using_srm 541 /* Assume that we've booted from SRM if we haven't booted from MILO. 542 Detect the later by looking for "MILO" in the system serial nr. */ 543 alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0; 544 #endif 545 #ifndef alpha_using_qemu 546 /* Similarly, look for QEMU. */ 547 alpha_using_qemu = strstr((const char *)hwrpb->ssn, "QEMU") != 0; 548 #endif 549 550 /* If we are using SRM, we want to allow callbacks 551 as early as possible, so do this NOW, and then 552 they should work immediately thereafter. 553 */ 554 kernel_end = callback_init(kernel_end); 555 556 /* 557 * Locate the command line. 558 */ 559 /* Hack for Jensen... since we're restricted to 8 or 16 chars for 560 boot flags depending on the boot mode, we need some shorthand. 561 This should do for installation. */ 562 if (strcmp(COMMAND_LINE, "INSTALL") == 0) { 563 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line); 564 } else { 565 strlcpy(command_line, COMMAND_LINE, sizeof command_line); 566 } 567 strcpy(boot_command_line, command_line); 568 *cmdline_p = command_line; 569 570 /* 571 * Process command-line arguments. 572 */ 573 while ((p = strsep(&args, " \t")) != NULL) { 574 if (!*p) continue; 575 if (strncmp(p, "alpha_mv=", 9) == 0) { 576 vec = get_sysvec_byname(p+9); 577 continue; 578 } 579 if (strncmp(p, "cycle=", 6) == 0) { 580 est_cycle_freq = simple_strtol(p+6, NULL, 0); 581 continue; 582 } 583 if (strncmp(p, "mem=", 4) == 0) { 584 mem_size_limit = get_mem_size_limit(p+4); 585 continue; 586 } 587 if (strncmp(p, "srmcons", 7) == 0) { 588 srmcons_output |= 1; 589 continue; 590 } 591 if (strncmp(p, "console=srm", 11) == 0) { 592 srmcons_output |= 2; 593 continue; 594 } 595 if (strncmp(p, "gartsize=", 9) == 0) { 596 alpha_agpgart_size = 597 get_mem_size_limit(p+9) << PAGE_SHIFT; 598 continue; 599 } 600 #ifdef CONFIG_VERBOSE_MCHECK 601 if (strncmp(p, "verbose_mcheck=", 15) == 0) { 602 alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0); 603 continue; 604 } 605 #endif 606 } 607 608 /* Replace the command line, now that we've killed it with strsep. */ 609 strcpy(command_line, boot_command_line); 610 611 /* If we want SRM console printk echoing early, do it now. */ 612 if (alpha_using_srm && srmcons_output) { 613 register_srm_console(); 614 615 /* 616 * If "console=srm" was specified, clear the srmcons_output 617 * flag now so that time.c won't unregister_srm_console 618 */ 619 if (srmcons_output & 2) 620 srmcons_output = 0; 621 } 622 623 #ifdef CONFIG_MAGIC_SYSRQ 624 /* If we're using SRM, make sysrq-b halt back to the prom, 625 not auto-reboot. */ 626 if (alpha_using_srm) { 627 struct sysrq_key_op *op = __sysrq_get_key_op('b'); 628 op->handler = (void *) machine_halt; 629 } 630 #endif 631 632 /* 633 * Identify and reconfigure for the current system. 634 */ 635 cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset); 636 637 get_sysnames(hwrpb->sys_type, hwrpb->sys_variation, 638 cpu->type, &type_name, &var_name); 639 if (*var_name == '0') 640 var_name = ""; 641 642 if (!vec) { 643 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation, 644 cpu->type); 645 } 646 647 if (!vec) { 648 panic("Unsupported system type: %s%s%s (%ld %ld)\n", 649 type_name, (*var_name ? " variation " : ""), var_name, 650 hwrpb->sys_type, hwrpb->sys_variation); 651 } 652 if (vec != &alpha_mv) { 653 alpha_mv = *vec; 654 } 655 656 printk("Booting " 657 #ifdef CONFIG_ALPHA_GENERIC 658 "GENERIC " 659 #endif 660 "on %s%s%s using machine vector %s from %s\n", 661 type_name, (*var_name ? " variation " : ""), 662 var_name, alpha_mv.vector_name, 663 (alpha_using_srm ? "SRM" : "MILO")); 664 665 printk("Major Options: " 666 #ifdef CONFIG_SMP 667 "SMP " 668 #endif 669 #ifdef CONFIG_ALPHA_EV56 670 "EV56 " 671 #endif 672 #ifdef CONFIG_ALPHA_EV67 673 "EV67 " 674 #endif 675 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS 676 "LEGACY_START " 677 #endif 678 #ifdef CONFIG_VERBOSE_MCHECK 679 "VERBOSE_MCHECK " 680 #endif 681 682 #ifdef CONFIG_DISCONTIGMEM 683 "DISCONTIGMEM " 684 #ifdef CONFIG_NUMA 685 "NUMA " 686 #endif 687 #endif 688 689 #ifdef CONFIG_DEBUG_SPINLOCK 690 "DEBUG_SPINLOCK " 691 #endif 692 #ifdef CONFIG_MAGIC_SYSRQ 693 "MAGIC_SYSRQ " 694 #endif 695 "\n"); 696 697 printk("Command line: %s\n", command_line); 698 699 /* 700 * Sync up the HAE. 701 * Save the SRM's current value for restoration. 702 */ 703 srm_hae = *alpha_mv.hae_register; 704 __set_hae(alpha_mv.hae_cache); 705 706 /* Reset enable correctable error reports. */ 707 wrmces(0x7); 708 709 /* Find our memory. */ 710 setup_memory(kernel_end); 711 712 /* First guess at cpu cache sizes. Do this before init_arch. */ 713 determine_cpu_caches(cpu->type); 714 715 /* Initialize the machine. Usually has to do with setting up 716 DMA windows and the like. */ 717 if (alpha_mv.init_arch) 718 alpha_mv.init_arch(); 719 720 /* Reserve standard resources. */ 721 reserve_std_resources(); 722 723 /* 724 * Give us a default console. TGA users will see nothing until 725 * chr_dev_init is called, rather late in the boot sequence. 726 */ 727 728 #ifdef CONFIG_VT 729 #if defined(CONFIG_VGA_CONSOLE) 730 conswitchp = &vga_con; 731 #elif defined(CONFIG_DUMMY_CONSOLE) 732 conswitchp = &dummy_con; 733 #endif 734 #endif 735 736 /* Default root filesystem to sda2. */ 737 ROOT_DEV = Root_SDA2; 738 739 #ifdef CONFIG_EISA 740 /* FIXME: only set this when we actually have EISA in this box? */ 741 EISA_bus = 1; 742 #endif 743 744 /* 745 * Check ASN in HWRPB for validity, report if bad. 746 * FIXME: how was this failing? Should we trust it instead, 747 * and copy the value into alpha_mv.max_asn? 748 */ 749 750 if (hwrpb->max_asn != MAX_ASN) { 751 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn); 752 } 753 754 /* 755 * Identify the flock of penguins. 756 */ 757 758 #ifdef CONFIG_SMP 759 setup_smp(); 760 #endif 761 paging_init(); 762 } 763 764 static char sys_unknown[] = "Unknown"; 765 static char systype_names[][16] = { 766 "0", 767 "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen", 768 "Pelican", "Morgan", "Sable", "Medulla", "Noname", 769 "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind", 770 "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1", 771 "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake", 772 "Cortex", "29", "Miata", "XXM", "Takara", "Yukon", 773 "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel" 774 }; 775 776 static char unofficial_names[][8] = {"100", "Ruffian"}; 777 778 static char api_names[][16] = {"200", "Nautilus"}; 779 780 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"}; 781 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4}; 782 783 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"}; 784 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2}; 785 786 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"}; 787 static int eb64p_indices[] = {0,0,1,2}; 788 789 static char eb66_names[][8] = {"EB66", "EB66+"}; 790 static int eb66_indices[] = {0,0,1}; 791 792 static char marvel_names[][16] = { 793 "Marvel/EV7" 794 }; 795 static int marvel_indices[] = { 0 }; 796 797 static char rawhide_names[][16] = { 798 "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci" 799 }; 800 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4}; 801 802 static char titan_names[][16] = { 803 "DEFAULT", "Privateer", "Falcon", "Granite" 804 }; 805 static int titan_indices[] = {0,1,2,2,3}; 806 807 static char tsunami_names[][16] = { 808 "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper", 809 "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne", 810 "Flying Clipper", "Shark" 811 }; 812 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12}; 813 814 static struct alpha_machine_vector * __init 815 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu) 816 { 817 static struct alpha_machine_vector *systype_vecs[] __initdata = 818 { 819 NULL, /* 0 */ 820 NULL, /* ADU */ 821 NULL, /* Cobra */ 822 NULL, /* Ruby */ 823 NULL, /* Flamingo */ 824 NULL, /* Mannequin */ 825 &jensen_mv, 826 NULL, /* Pelican */ 827 NULL, /* Morgan */ 828 NULL, /* Sable -- see below. */ 829 NULL, /* Medulla */ 830 &noname_mv, 831 NULL, /* Turbolaser */ 832 &avanti_mv, 833 NULL, /* Mustang */ 834 NULL, /* Alcor, Bret, Maverick. HWRPB inaccurate? */ 835 NULL, /* Tradewind */ 836 NULL, /* Mikasa -- see below. */ 837 NULL, /* EB64 */ 838 NULL, /* EB66 -- see variation. */ 839 NULL, /* EB64+ -- see variation. */ 840 &alphabook1_mv, 841 &rawhide_mv, 842 NULL, /* K2 */ 843 &lynx_mv, /* Lynx */ 844 &xl_mv, 845 NULL, /* EB164 -- see variation. */ 846 NULL, /* Noritake -- see below. */ 847 NULL, /* Cortex */ 848 NULL, /* 29 */ 849 &miata_mv, 850 NULL, /* XXM */ 851 &takara_mv, 852 NULL, /* Yukon */ 853 NULL, /* Tsunami -- see variation. */ 854 &wildfire_mv, /* Wildfire */ 855 NULL, /* CUSCO */ 856 &eiger_mv, /* Eiger */ 857 NULL, /* Titan */ 858 NULL, /* Marvel */ 859 }; 860 861 static struct alpha_machine_vector *unofficial_vecs[] __initdata = 862 { 863 NULL, /* 100 */ 864 &ruffian_mv, 865 }; 866 867 static struct alpha_machine_vector *api_vecs[] __initdata = 868 { 869 NULL, /* 200 */ 870 &nautilus_mv, 871 }; 872 873 static struct alpha_machine_vector *alcor_vecs[] __initdata = 874 { 875 &alcor_mv, &xlt_mv, &xlt_mv 876 }; 877 878 static struct alpha_machine_vector *eb164_vecs[] __initdata = 879 { 880 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv 881 }; 882 883 static struct alpha_machine_vector *eb64p_vecs[] __initdata = 884 { 885 &eb64p_mv, 886 &cabriolet_mv, 887 &cabriolet_mv /* AlphaPCI64 */ 888 }; 889 890 static struct alpha_machine_vector *eb66_vecs[] __initdata = 891 { 892 &eb66_mv, 893 &eb66p_mv 894 }; 895 896 static struct alpha_machine_vector *marvel_vecs[] __initdata = 897 { 898 &marvel_ev7_mv, 899 }; 900 901 static struct alpha_machine_vector *titan_vecs[] __initdata = 902 { 903 &titan_mv, /* default */ 904 &privateer_mv, /* privateer */ 905 &titan_mv, /* falcon */ 906 &privateer_mv, /* granite */ 907 }; 908 909 static struct alpha_machine_vector *tsunami_vecs[] __initdata = 910 { 911 NULL, 912 &dp264_mv, /* dp264 */ 913 &dp264_mv, /* warhol */ 914 &dp264_mv, /* windjammer */ 915 &monet_mv, /* monet */ 916 &clipper_mv, /* clipper */ 917 &dp264_mv, /* goldrush */ 918 &webbrick_mv, /* webbrick */ 919 &dp264_mv, /* catamaran */ 920 NULL, /* brisbane? */ 921 NULL, /* melbourne? */ 922 NULL, /* flying clipper? */ 923 &shark_mv, /* shark */ 924 }; 925 926 /* ??? Do we need to distinguish between Rawhides? */ 927 928 struct alpha_machine_vector *vec; 929 930 /* Search the system tables first... */ 931 vec = NULL; 932 if (type < ARRAY_SIZE(systype_vecs)) { 933 vec = systype_vecs[type]; 934 } else if ((type > ST_API_BIAS) && 935 (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) { 936 vec = api_vecs[type - ST_API_BIAS]; 937 } else if ((type > ST_UNOFFICIAL_BIAS) && 938 (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) { 939 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS]; 940 } 941 942 /* If we've not found one, try for a variation. */ 943 944 if (!vec) { 945 /* Member ID is a bit-field. */ 946 unsigned long member = (variation >> 10) & 0x3f; 947 948 cpu &= 0xffffffff; /* make it usable */ 949 950 switch (type) { 951 case ST_DEC_ALCOR: 952 if (member < ARRAY_SIZE(alcor_indices)) 953 vec = alcor_vecs[alcor_indices[member]]; 954 break; 955 case ST_DEC_EB164: 956 if (member < ARRAY_SIZE(eb164_indices)) 957 vec = eb164_vecs[eb164_indices[member]]; 958 /* PC164 may show as EB164 variation with EV56 CPU, 959 but, since no true EB164 had anything but EV5... */ 960 if (vec == &eb164_mv && cpu == EV56_CPU) 961 vec = &pc164_mv; 962 break; 963 case ST_DEC_EB64P: 964 if (member < ARRAY_SIZE(eb64p_indices)) 965 vec = eb64p_vecs[eb64p_indices[member]]; 966 break; 967 case ST_DEC_EB66: 968 if (member < ARRAY_SIZE(eb66_indices)) 969 vec = eb66_vecs[eb66_indices[member]]; 970 break; 971 case ST_DEC_MARVEL: 972 if (member < ARRAY_SIZE(marvel_indices)) 973 vec = marvel_vecs[marvel_indices[member]]; 974 break; 975 case ST_DEC_TITAN: 976 vec = titan_vecs[0]; /* default */ 977 if (member < ARRAY_SIZE(titan_indices)) 978 vec = titan_vecs[titan_indices[member]]; 979 break; 980 case ST_DEC_TSUNAMI: 981 if (member < ARRAY_SIZE(tsunami_indices)) 982 vec = tsunami_vecs[tsunami_indices[member]]; 983 break; 984 case ST_DEC_1000: 985 if (cpu == EV5_CPU || cpu == EV56_CPU) 986 vec = &mikasa_primo_mv; 987 else 988 vec = &mikasa_mv; 989 break; 990 case ST_DEC_NORITAKE: 991 if (cpu == EV5_CPU || cpu == EV56_CPU) 992 vec = &noritake_primo_mv; 993 else 994 vec = &noritake_mv; 995 break; 996 case ST_DEC_2100_A500: 997 if (cpu == EV5_CPU || cpu == EV56_CPU) 998 vec = &sable_gamma_mv; 999 else 1000 vec = &sable_mv; 1001 break; 1002 } 1003 } 1004 return vec; 1005 } 1006 1007 static struct alpha_machine_vector * __init 1008 get_sysvec_byname(const char *name) 1009 { 1010 static struct alpha_machine_vector *all_vecs[] __initdata = 1011 { 1012 &alcor_mv, 1013 &alphabook1_mv, 1014 &avanti_mv, 1015 &cabriolet_mv, 1016 &clipper_mv, 1017 &dp264_mv, 1018 &eb164_mv, 1019 &eb64p_mv, 1020 &eb66_mv, 1021 &eb66p_mv, 1022 &eiger_mv, 1023 &jensen_mv, 1024 &lx164_mv, 1025 &lynx_mv, 1026 &miata_mv, 1027 &mikasa_mv, 1028 &mikasa_primo_mv, 1029 &monet_mv, 1030 &nautilus_mv, 1031 &noname_mv, 1032 &noritake_mv, 1033 &noritake_primo_mv, 1034 &p2k_mv, 1035 &pc164_mv, 1036 &privateer_mv, 1037 &rawhide_mv, 1038 &ruffian_mv, 1039 &rx164_mv, 1040 &sable_mv, 1041 &sable_gamma_mv, 1042 &shark_mv, 1043 &sx164_mv, 1044 &takara_mv, 1045 &webbrick_mv, 1046 &wildfire_mv, 1047 &xl_mv, 1048 &xlt_mv 1049 }; 1050 1051 size_t i; 1052 1053 for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) { 1054 struct alpha_machine_vector *mv = all_vecs[i]; 1055 if (strcasecmp(mv->vector_name, name) == 0) 1056 return mv; 1057 } 1058 return NULL; 1059 } 1060 1061 static void 1062 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu, 1063 char **type_name, char **variation_name) 1064 { 1065 unsigned long member; 1066 1067 /* If not in the tables, make it UNKNOWN, 1068 else set type name to family */ 1069 if (type < ARRAY_SIZE(systype_names)) { 1070 *type_name = systype_names[type]; 1071 } else if ((type > ST_API_BIAS) && 1072 (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) { 1073 *type_name = api_names[type - ST_API_BIAS]; 1074 } else if ((type > ST_UNOFFICIAL_BIAS) && 1075 (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) { 1076 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS]; 1077 } else { 1078 *type_name = sys_unknown; 1079 *variation_name = sys_unknown; 1080 return; 1081 } 1082 1083 /* Set variation to "0"; if variation is zero, done. */ 1084 *variation_name = systype_names[0]; 1085 if (variation == 0) { 1086 return; 1087 } 1088 1089 member = (variation >> 10) & 0x3f; /* member ID is a bit-field */ 1090 1091 cpu &= 0xffffffff; /* make it usable */ 1092 1093 switch (type) { /* select by family */ 1094 default: /* default to variation "0" for now */ 1095 break; 1096 case ST_DEC_EB164: 1097 if (member < ARRAY_SIZE(eb164_indices)) 1098 *variation_name = eb164_names[eb164_indices[member]]; 1099 /* PC164 may show as EB164 variation, but with EV56 CPU, 1100 so, since no true EB164 had anything but EV5... */ 1101 if (eb164_indices[member] == 0 && cpu == EV56_CPU) 1102 *variation_name = eb164_names[1]; /* make it PC164 */ 1103 break; 1104 case ST_DEC_ALCOR: 1105 if (member < ARRAY_SIZE(alcor_indices)) 1106 *variation_name = alcor_names[alcor_indices[member]]; 1107 break; 1108 case ST_DEC_EB64P: 1109 if (member < ARRAY_SIZE(eb64p_indices)) 1110 *variation_name = eb64p_names[eb64p_indices[member]]; 1111 break; 1112 case ST_DEC_EB66: 1113 if (member < ARRAY_SIZE(eb66_indices)) 1114 *variation_name = eb66_names[eb66_indices[member]]; 1115 break; 1116 case ST_DEC_MARVEL: 1117 if (member < ARRAY_SIZE(marvel_indices)) 1118 *variation_name = marvel_names[marvel_indices[member]]; 1119 break; 1120 case ST_DEC_RAWHIDE: 1121 if (member < ARRAY_SIZE(rawhide_indices)) 1122 *variation_name = rawhide_names[rawhide_indices[member]]; 1123 break; 1124 case ST_DEC_TITAN: 1125 *variation_name = titan_names[0]; /* default */ 1126 if (member < ARRAY_SIZE(titan_indices)) 1127 *variation_name = titan_names[titan_indices[member]]; 1128 break; 1129 case ST_DEC_TSUNAMI: 1130 if (member < ARRAY_SIZE(tsunami_indices)) 1131 *variation_name = tsunami_names[tsunami_indices[member]]; 1132 break; 1133 } 1134 } 1135 1136 /* 1137 * A change was made to the HWRPB via an ECO and the following code 1138 * tracks a part of the ECO. In HWRPB versions less than 5, the ECO 1139 * was not implemented in the console firmware. If it's revision 5 or 1140 * greater we can get the name of the platform as an ASCII string from 1141 * the HWRPB. That's what this function does. It checks the revision 1142 * level and if the string is in the HWRPB it returns the address of 1143 * the string--a pointer to the name of the platform. 1144 * 1145 * Returns: 1146 * - Pointer to a ASCII string if it's in the HWRPB 1147 * - Pointer to a blank string if the data is not in the HWRPB. 1148 */ 1149 1150 static char * 1151 platform_string(void) 1152 { 1153 struct dsr_struct *dsr; 1154 static char unk_system_string[] = "N/A"; 1155 1156 /* Go to the console for the string pointer. 1157 * If the rpb_vers is not 5 or greater the rpb 1158 * is old and does not have this data in it. 1159 */ 1160 if (hwrpb->revision < 5) 1161 return (unk_system_string); 1162 else { 1163 /* The Dynamic System Recognition struct 1164 * has the system platform name starting 1165 * after the character count of the string. 1166 */ 1167 dsr = ((struct dsr_struct *) 1168 ((char *)hwrpb + hwrpb->dsr_offset)); 1169 return ((char *)dsr + (dsr->sysname_off + 1170 sizeof(long))); 1171 } 1172 } 1173 1174 static int 1175 get_nr_processors(struct percpu_struct *cpubase, unsigned long num) 1176 { 1177 struct percpu_struct *cpu; 1178 unsigned long i; 1179 int count = 0; 1180 1181 for (i = 0; i < num; i++) { 1182 cpu = (struct percpu_struct *) 1183 ((char *)cpubase + i*hwrpb->processor_size); 1184 if ((cpu->flags & 0x1cc) == 0x1cc) 1185 count++; 1186 } 1187 return count; 1188 } 1189 1190 static void 1191 show_cache_size (struct seq_file *f, const char *which, int shape) 1192 { 1193 if (shape == -1) 1194 seq_printf (f, "%s\t\t: n/a\n", which); 1195 else if (shape == 0) 1196 seq_printf (f, "%s\t\t: unknown\n", which); 1197 else 1198 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n", 1199 which, shape >> 10, shape & 15, 1200 1 << ((shape >> 4) & 15)); 1201 } 1202 1203 static int 1204 show_cpuinfo(struct seq_file *f, void *slot) 1205 { 1206 extern struct unaligned_stat { 1207 unsigned long count, va, pc; 1208 } unaligned[2]; 1209 1210 static char cpu_names[][8] = { 1211 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56", 1212 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL", 1213 "EV68CX", "EV7", "EV79", "EV69" 1214 }; 1215 1216 struct percpu_struct *cpu = slot; 1217 unsigned int cpu_index; 1218 char *cpu_name; 1219 char *systype_name; 1220 char *sysvariation_name; 1221 int nr_processors; 1222 unsigned long timer_freq; 1223 1224 cpu_index = (unsigned) (cpu->type - 1); 1225 cpu_name = "Unknown"; 1226 if (cpu_index < ARRAY_SIZE(cpu_names)) 1227 cpu_name = cpu_names[cpu_index]; 1228 1229 get_sysnames(hwrpb->sys_type, hwrpb->sys_variation, 1230 cpu->type, &systype_name, &sysvariation_name); 1231 1232 nr_processors = get_nr_processors(cpu, hwrpb->nr_processors); 1233 1234 #if CONFIG_HZ == 1024 || CONFIG_HZ == 1200 1235 timer_freq = (100UL * hwrpb->intr_freq) / 4096; 1236 #else 1237 timer_freq = 100UL * CONFIG_HZ; 1238 #endif 1239 1240 seq_printf(f, "cpu\t\t\t: Alpha\n" 1241 "cpu model\t\t: %s\n" 1242 "cpu variation\t\t: %ld\n" 1243 "cpu revision\t\t: %ld\n" 1244 "cpu serial number\t: %s\n" 1245 "system type\t\t: %s\n" 1246 "system variation\t: %s\n" 1247 "system revision\t\t: %ld\n" 1248 "system serial number\t: %s\n" 1249 "cycle frequency [Hz]\t: %lu %s\n" 1250 "timer frequency [Hz]\t: %lu.%02lu\n" 1251 "page size [bytes]\t: %ld\n" 1252 "phys. address bits\t: %ld\n" 1253 "max. addr. space #\t: %ld\n" 1254 "BogoMIPS\t\t: %lu.%02lu\n" 1255 "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n" 1256 "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n" 1257 "platform string\t\t: %s\n" 1258 "cpus detected\t\t: %d\n", 1259 cpu_name, cpu->variation, cpu->revision, 1260 (char*)cpu->serial_no, 1261 systype_name, sysvariation_name, hwrpb->sys_revision, 1262 (char*)hwrpb->ssn, 1263 est_cycle_freq ? : hwrpb->cycle_freq, 1264 est_cycle_freq ? "est." : "", 1265 timer_freq / 100, timer_freq % 100, 1266 hwrpb->pagesize, 1267 hwrpb->pa_bits, 1268 hwrpb->max_asn, 1269 loops_per_jiffy / (500000/HZ), 1270 (loops_per_jiffy / (5000/HZ)) % 100, 1271 unaligned[0].count, unaligned[0].pc, unaligned[0].va, 1272 unaligned[1].count, unaligned[1].pc, unaligned[1].va, 1273 platform_string(), nr_processors); 1274 1275 #ifdef CONFIG_SMP 1276 seq_printf(f, "cpus active\t\t: %u\n" 1277 "cpu active mask\t\t: %016lx\n", 1278 num_online_cpus(), cpumask_bits(cpu_possible_mask)[0]); 1279 #endif 1280 1281 show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape); 1282 show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape); 1283 show_cache_size (f, "L2 cache", alpha_l2_cacheshape); 1284 show_cache_size (f, "L3 cache", alpha_l3_cacheshape); 1285 1286 return 0; 1287 } 1288 1289 static int __init 1290 read_mem_block(int *addr, int stride, int size) 1291 { 1292 long nloads = size / stride, cnt, tmp; 1293 1294 __asm__ __volatile__( 1295 " rpcc %0\n" 1296 "1: ldl %3,0(%2)\n" 1297 " subq %1,1,%1\n" 1298 /* Next two XORs introduce an explicit data dependency between 1299 consecutive loads in the loop, which will give us true load 1300 latency. */ 1301 " xor %3,%2,%2\n" 1302 " xor %3,%2,%2\n" 1303 " addq %2,%4,%2\n" 1304 " bne %1,1b\n" 1305 " rpcc %3\n" 1306 " subl %3,%0,%0\n" 1307 : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp) 1308 : "r" (stride), "1" (nloads), "2" (addr)); 1309 1310 return cnt / (size / stride); 1311 } 1312 1313 #define CSHAPE(totalsize, linesize, assoc) \ 1314 ((totalsize & ~0xff) | (linesize << 4) | assoc) 1315 1316 /* ??? EV5 supports up to 64M, but did the systems with more than 1317 16M of BCACHE ever exist? */ 1318 #define MAX_BCACHE_SIZE 16*1024*1024 1319 1320 /* Note that the offchip caches are direct mapped on all Alphas. */ 1321 static int __init 1322 external_cache_probe(int minsize, int width) 1323 { 1324 int cycles, prev_cycles = 1000000; 1325 int stride = 1 << width; 1326 long size = minsize, maxsize = MAX_BCACHE_SIZE * 2; 1327 1328 if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT) 1329 maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT); 1330 1331 /* Get the first block cached. */ 1332 read_mem_block(__va(0), stride, size); 1333 1334 while (size < maxsize) { 1335 /* Get an average load latency in cycles. */ 1336 cycles = read_mem_block(__va(0), stride, size); 1337 if (cycles > prev_cycles * 2) { 1338 /* Fine, we exceed the cache. */ 1339 printk("%ldK Bcache detected; load hit latency %d " 1340 "cycles, load miss latency %d cycles\n", 1341 size >> 11, prev_cycles, cycles); 1342 return CSHAPE(size >> 1, width, 1); 1343 } 1344 /* Try to get the next block cached. */ 1345 read_mem_block(__va(size), stride, size); 1346 prev_cycles = cycles; 1347 size <<= 1; 1348 } 1349 return -1; /* No BCACHE found. */ 1350 } 1351 1352 static void __init 1353 determine_cpu_caches (unsigned int cpu_type) 1354 { 1355 int L1I, L1D, L2, L3; 1356 1357 switch (cpu_type) { 1358 case EV4_CPU: 1359 case EV45_CPU: 1360 { 1361 if (cpu_type == EV4_CPU) 1362 L1I = CSHAPE(8*1024, 5, 1); 1363 else 1364 L1I = CSHAPE(16*1024, 5, 1); 1365 L1D = L1I; 1366 L3 = -1; 1367 1368 /* BIU_CTL is a write-only Abox register. PALcode has a 1369 shadow copy, and may be available from some versions 1370 of the CSERVE PALcall. If we can get it, then 1371 1372 unsigned long biu_ctl, size; 1373 size = 128*1024 * (1 << ((biu_ctl >> 28) & 7)); 1374 L2 = CSHAPE (size, 5, 1); 1375 1376 Unfortunately, we can't rely on that. 1377 */ 1378 L2 = external_cache_probe(128*1024, 5); 1379 break; 1380 } 1381 1382 case LCA4_CPU: 1383 { 1384 unsigned long car, size; 1385 1386 L1I = L1D = CSHAPE(8*1024, 5, 1); 1387 L3 = -1; 1388 1389 car = *(vuip) phys_to_virt (0x120000078UL); 1390 size = 64*1024 * (1 << ((car >> 5) & 7)); 1391 /* No typo -- 8 byte cacheline size. Whodathunk. */ 1392 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1); 1393 break; 1394 } 1395 1396 case EV5_CPU: 1397 case EV56_CPU: 1398 { 1399 unsigned long sc_ctl, width; 1400 1401 L1I = L1D = CSHAPE(8*1024, 5, 1); 1402 1403 /* Check the line size of the Scache. */ 1404 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL); 1405 width = sc_ctl & 0x1000 ? 6 : 5; 1406 L2 = CSHAPE (96*1024, width, 3); 1407 1408 /* BC_CONTROL and BC_CONFIG are write-only IPRs. PALcode 1409 has a shadow copy, and may be available from some versions 1410 of the CSERVE PALcall. If we can get it, then 1411 1412 unsigned long bc_control, bc_config, size; 1413 size = 1024*1024 * (1 << ((bc_config & 7) - 1)); 1414 L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1); 1415 1416 Unfortunately, we can't rely on that. 1417 */ 1418 L3 = external_cache_probe(1024*1024, width); 1419 break; 1420 } 1421 1422 case PCA56_CPU: 1423 case PCA57_CPU: 1424 { 1425 if (cpu_type == PCA56_CPU) { 1426 L1I = CSHAPE(16*1024, 6, 1); 1427 L1D = CSHAPE(8*1024, 5, 1); 1428 } else { 1429 L1I = CSHAPE(32*1024, 6, 2); 1430 L1D = CSHAPE(16*1024, 5, 1); 1431 } 1432 L3 = -1; 1433 1434 #if 0 1435 unsigned long cbox_config, size; 1436 1437 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL); 1438 size = 512*1024 * (1 << ((cbox_config >> 12) & 3)); 1439 1440 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1); 1441 #else 1442 L2 = external_cache_probe(512*1024, 6); 1443 #endif 1444 break; 1445 } 1446 1447 case EV6_CPU: 1448 case EV67_CPU: 1449 case EV68CB_CPU: 1450 case EV68AL_CPU: 1451 case EV68CX_CPU: 1452 case EV69_CPU: 1453 L1I = L1D = CSHAPE(64*1024, 6, 2); 1454 L2 = external_cache_probe(1024*1024, 6); 1455 L3 = -1; 1456 break; 1457 1458 case EV7_CPU: 1459 case EV79_CPU: 1460 L1I = L1D = CSHAPE(64*1024, 6, 2); 1461 L2 = CSHAPE(7*1024*1024/4, 6, 7); 1462 L3 = -1; 1463 break; 1464 1465 default: 1466 /* Nothing known about this cpu type. */ 1467 L1I = L1D = L2 = L3 = 0; 1468 break; 1469 } 1470 1471 alpha_l1i_cacheshape = L1I; 1472 alpha_l1d_cacheshape = L1D; 1473 alpha_l2_cacheshape = L2; 1474 alpha_l3_cacheshape = L3; 1475 } 1476 1477 /* 1478 * We show only CPU #0 info. 1479 */ 1480 static void * 1481 c_start(struct seq_file *f, loff_t *pos) 1482 { 1483 return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset; 1484 } 1485 1486 static void * 1487 c_next(struct seq_file *f, void *v, loff_t *pos) 1488 { 1489 return NULL; 1490 } 1491 1492 static void 1493 c_stop(struct seq_file *f, void *v) 1494 { 1495 } 1496 1497 const struct seq_operations cpuinfo_op = { 1498 .start = c_start, 1499 .next = c_next, 1500 .stop = c_stop, 1501 .show = show_cpuinfo, 1502 }; 1503 1504 1505 static int 1506 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr) 1507 { 1508 #if 1 1509 /* FIXME FIXME FIXME */ 1510 /* If we are using SRM and serial console, just hard halt here. */ 1511 if (alpha_using_srm && srmcons_output) 1512 __halt(); 1513 #endif 1514 return NOTIFY_DONE; 1515 } 1516 1517 static __init int add_pcspkr(void) 1518 { 1519 struct platform_device *pd; 1520 int ret; 1521 1522 pd = platform_device_alloc("pcspkr", -1); 1523 if (!pd) 1524 return -ENOMEM; 1525 1526 ret = platform_device_add(pd); 1527 if (ret) 1528 platform_device_put(pd); 1529 1530 return ret; 1531 } 1532 device_initcall(add_pcspkr); 1533