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