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/bootmem.h> 33 #include <linux/pci.h> 34 #include <linux/seq_file.h> 35 #include <linux/root_dev.h> 36 #include <linux/initrd.h> 37 #include <linux/eisa.h> 38 #include <linux/pfn.h> 39 #ifdef CONFIG_MAGIC_SYSRQ 40 #include <linux/sysrq.h> 41 #include <linux/reboot.h> 42 #endif 43 #include <linux/notifier.h> 44 #include <asm/setup.h> 45 #include <asm/io.h> 46 #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 = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0); 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 start_kernel_pfn, end_kernel_pfn; 316 unsigned long bootmap_size, bootmap_pages, bootmap_start; 317 unsigned long start, end; 318 unsigned long i; 319 320 /* Find free clusters, and init and free the bootmem accordingly. */ 321 memdesc = (struct memdesc_struct *) 322 (hwrpb->mddt_offset + (unsigned long) hwrpb); 323 324 for_each_mem_cluster(memdesc, cluster, i) { 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 } 339 340 /* 341 * Except for the NUMA systems (wildfire, marvel) all of the 342 * Alpha systems we run on support 32GB of memory or less. 343 * Since the NUMA systems introduce large holes in memory addressing, 344 * we can get into a situation where there is not enough contiguous 345 * memory for the memory map. 346 * 347 * Limit memory to the first 32GB to limit the NUMA systems to 348 * memory on their first node (wildfire) or 2 (marvel) to avoid 349 * not being able to produce the memory map. In order to access 350 * all of the memory on the NUMA systems, build with discontiguous 351 * memory support. 352 * 353 * If the user specified a memory limit, let that memory limit stand. 354 */ 355 if (!mem_size_limit) 356 mem_size_limit = (32ul * 1024 * 1024 * 1024) >> PAGE_SHIFT; 357 358 if (mem_size_limit && max_low_pfn >= mem_size_limit) 359 { 360 printk("setup: forcing memory size to %ldK (from %ldK).\n", 361 mem_size_limit << (PAGE_SHIFT - 10), 362 max_low_pfn << (PAGE_SHIFT - 10)); 363 max_low_pfn = mem_size_limit; 364 } 365 366 /* Find the bounds of kernel memory. */ 367 start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS); 368 end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end)); 369 bootmap_start = -1; 370 371 try_again: 372 if (max_low_pfn <= end_kernel_pfn) 373 panic("not enough memory to boot"); 374 375 /* We need to know how many physically contiguous pages 376 we'll need for the bootmap. */ 377 bootmap_pages = bootmem_bootmap_pages(max_low_pfn); 378 379 /* Now find a good region where to allocate the bootmap. */ 380 for_each_mem_cluster(memdesc, cluster, i) { 381 if (cluster->usage & 3) 382 continue; 383 384 start = cluster->start_pfn; 385 end = start + cluster->numpages; 386 if (start >= max_low_pfn) 387 continue; 388 if (end > max_low_pfn) 389 end = max_low_pfn; 390 if (start < start_kernel_pfn) { 391 if (end > end_kernel_pfn 392 && end - end_kernel_pfn >= bootmap_pages) { 393 bootmap_start = end_kernel_pfn; 394 break; 395 } else if (end > start_kernel_pfn) 396 end = start_kernel_pfn; 397 } else if (start < end_kernel_pfn) 398 start = end_kernel_pfn; 399 if (end - start >= bootmap_pages) { 400 bootmap_start = start; 401 break; 402 } 403 } 404 405 if (bootmap_start == ~0UL) { 406 max_low_pfn >>= 1; 407 goto try_again; 408 } 409 410 /* Allocate the bootmap and mark the whole MM as reserved. */ 411 bootmap_size = init_bootmem(bootmap_start, max_low_pfn); 412 413 /* Mark the free regions. */ 414 for_each_mem_cluster(memdesc, cluster, i) { 415 if (cluster->usage & 3) 416 continue; 417 418 start = cluster->start_pfn; 419 end = cluster->start_pfn + cluster->numpages; 420 if (start >= max_low_pfn) 421 continue; 422 if (end > max_low_pfn) 423 end = max_low_pfn; 424 if (start < start_kernel_pfn) { 425 if (end > end_kernel_pfn) { 426 free_bootmem(PFN_PHYS(start), 427 (PFN_PHYS(start_kernel_pfn) 428 - PFN_PHYS(start))); 429 printk("freeing pages %ld:%ld\n", 430 start, start_kernel_pfn); 431 start = end_kernel_pfn; 432 } else if (end > start_kernel_pfn) 433 end = start_kernel_pfn; 434 } else if (start < end_kernel_pfn) 435 start = end_kernel_pfn; 436 if (start >= end) 437 continue; 438 439 free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start)); 440 printk("freeing pages %ld:%ld\n", start, end); 441 } 442 443 /* Reserve the bootmap memory. */ 444 reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size, 445 BOOTMEM_DEFAULT); 446 printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size)); 447 448 #ifdef CONFIG_BLK_DEV_INITRD 449 initrd_start = INITRD_START; 450 if (initrd_start) { 451 initrd_end = initrd_start+INITRD_SIZE; 452 printk("Initial ramdisk at: 0x%p (%lu bytes)\n", 453 (void *) initrd_start, INITRD_SIZE); 454 455 if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) { 456 if (!move_initrd(PFN_PHYS(max_low_pfn))) 457 printk("initrd extends beyond end of memory " 458 "(0x%08lx > 0x%p)\ndisabling initrd\n", 459 initrd_end, 460 phys_to_virt(PFN_PHYS(max_low_pfn))); 461 } else { 462 reserve_bootmem(virt_to_phys((void *)initrd_start), 463 INITRD_SIZE, BOOTMEM_DEFAULT); 464 } 465 } 466 #endif /* CONFIG_BLK_DEV_INITRD */ 467 } 468 #else 469 extern void setup_memory(void *); 470 #endif /* !CONFIG_DISCONTIGMEM */ 471 472 int __init 473 page_is_ram(unsigned long pfn) 474 { 475 struct memclust_struct * cluster; 476 struct memdesc_struct * memdesc; 477 unsigned long i; 478 479 memdesc = (struct memdesc_struct *) 480 (hwrpb->mddt_offset + (unsigned long) hwrpb); 481 for_each_mem_cluster(memdesc, cluster, i) 482 { 483 if (pfn >= cluster->start_pfn && 484 pfn < cluster->start_pfn + cluster->numpages) { 485 return (cluster->usage & 3) ? 0 : 1; 486 } 487 } 488 489 return 0; 490 } 491 492 static int __init 493 register_cpus(void) 494 { 495 int i; 496 497 for_each_possible_cpu(i) { 498 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); 499 if (!p) 500 return -ENOMEM; 501 register_cpu(p, i); 502 } 503 return 0; 504 } 505 506 arch_initcall(register_cpus); 507 508 void __init 509 setup_arch(char **cmdline_p) 510 { 511 extern char _end[]; 512 513 struct alpha_machine_vector *vec = NULL; 514 struct percpu_struct *cpu; 515 char *type_name, *var_name, *p; 516 void *kernel_end = _end; /* end of kernel */ 517 char *args = command_line; 518 519 hwrpb = (struct hwrpb_struct*) __va(INIT_HWRPB->phys_addr); 520 boot_cpuid = hard_smp_processor_id(); 521 522 /* 523 * Pre-process the system type to make sure it will be valid. 524 * 525 * This may restore real CABRIO and EB66+ family names, ie 526 * EB64+ and EB66. 527 * 528 * Oh, and "white box" AS800 (aka DIGITAL Server 3000 series) 529 * and AS1200 (DIGITAL Server 5000 series) have the type as 530 * the negative of the real one. 531 */ 532 if ((long)hwrpb->sys_type < 0) { 533 hwrpb->sys_type = -((long)hwrpb->sys_type); 534 hwrpb_update_checksum(hwrpb); 535 } 536 537 /* Register a call for panic conditions. */ 538 atomic_notifier_chain_register(&panic_notifier_list, 539 &alpha_panic_block); 540 541 #ifndef alpha_using_srm 542 /* Assume that we've booted from SRM if we haven't booted from MILO. 543 Detect the later by looking for "MILO" in the system serial nr. */ 544 alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0; 545 #endif 546 #ifndef alpha_using_qemu 547 /* Similarly, look for QEMU. */ 548 alpha_using_qemu = strstr((const char *)hwrpb->ssn, "QEMU") != 0; 549 #endif 550 551 /* If we are using SRM, we want to allow callbacks 552 as early as possible, so do this NOW, and then 553 they should work immediately thereafter. 554 */ 555 kernel_end = callback_init(kernel_end); 556 557 /* 558 * Locate the command line. 559 */ 560 /* Hack for Jensen... since we're restricted to 8 or 16 chars for 561 boot flags depending on the boot mode, we need some shorthand. 562 This should do for installation. */ 563 if (strcmp(COMMAND_LINE, "INSTALL") == 0) { 564 strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line); 565 } else { 566 strlcpy(command_line, COMMAND_LINE, sizeof command_line); 567 } 568 strcpy(boot_command_line, command_line); 569 *cmdline_p = command_line; 570 571 /* 572 * Process command-line arguments. 573 */ 574 while ((p = strsep(&args, " \t")) != NULL) { 575 if (!*p) continue; 576 if (strncmp(p, "alpha_mv=", 9) == 0) { 577 vec = get_sysvec_byname(p+9); 578 continue; 579 } 580 if (strncmp(p, "cycle=", 6) == 0) { 581 est_cycle_freq = simple_strtol(p+6, NULL, 0); 582 continue; 583 } 584 if (strncmp(p, "mem=", 4) == 0) { 585 mem_size_limit = get_mem_size_limit(p+4); 586 continue; 587 } 588 if (strncmp(p, "srmcons", 7) == 0) { 589 srmcons_output |= 1; 590 continue; 591 } 592 if (strncmp(p, "console=srm", 11) == 0) { 593 srmcons_output |= 2; 594 continue; 595 } 596 if (strncmp(p, "gartsize=", 9) == 0) { 597 alpha_agpgart_size = 598 get_mem_size_limit(p+9) << PAGE_SHIFT; 599 continue; 600 } 601 #ifdef CONFIG_VERBOSE_MCHECK 602 if (strncmp(p, "verbose_mcheck=", 15) == 0) { 603 alpha_verbose_mcheck = simple_strtol(p+15, NULL, 0); 604 continue; 605 } 606 #endif 607 } 608 609 /* Replace the command line, now that we've killed it with strsep. */ 610 strcpy(command_line, boot_command_line); 611 612 /* If we want SRM console printk echoing early, do it now. */ 613 if (alpha_using_srm && srmcons_output) { 614 register_srm_console(); 615 616 /* 617 * If "console=srm" was specified, clear the srmcons_output 618 * flag now so that time.c won't unregister_srm_console 619 */ 620 if (srmcons_output & 2) 621 srmcons_output = 0; 622 } 623 624 #ifdef CONFIG_MAGIC_SYSRQ 625 /* If we're using SRM, make sysrq-b halt back to the prom, 626 not auto-reboot. */ 627 if (alpha_using_srm) { 628 struct sysrq_key_op *op = __sysrq_get_key_op('b'); 629 op->handler = (void *) machine_halt; 630 } 631 #endif 632 633 /* 634 * Identify and reconfigure for the current system. 635 */ 636 cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset); 637 638 get_sysnames(hwrpb->sys_type, hwrpb->sys_variation, 639 cpu->type, &type_name, &var_name); 640 if (*var_name == '0') 641 var_name = ""; 642 643 if (!vec) { 644 vec = get_sysvec(hwrpb->sys_type, hwrpb->sys_variation, 645 cpu->type); 646 } 647 648 if (!vec) { 649 panic("Unsupported system type: %s%s%s (%ld %ld)\n", 650 type_name, (*var_name ? " variation " : ""), var_name, 651 hwrpb->sys_type, hwrpb->sys_variation); 652 } 653 if (vec != &alpha_mv) { 654 alpha_mv = *vec; 655 } 656 657 printk("Booting " 658 #ifdef CONFIG_ALPHA_GENERIC 659 "GENERIC " 660 #endif 661 "on %s%s%s using machine vector %s from %s\n", 662 type_name, (*var_name ? " variation " : ""), 663 var_name, alpha_mv.vector_name, 664 (alpha_using_srm ? "SRM" : "MILO")); 665 666 printk("Major Options: " 667 #ifdef CONFIG_SMP 668 "SMP " 669 #endif 670 #ifdef CONFIG_ALPHA_EV56 671 "EV56 " 672 #endif 673 #ifdef CONFIG_ALPHA_EV67 674 "EV67 " 675 #endif 676 #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS 677 "LEGACY_START " 678 #endif 679 #ifdef CONFIG_VERBOSE_MCHECK 680 "VERBOSE_MCHECK " 681 #endif 682 683 #ifdef CONFIG_DISCONTIGMEM 684 "DISCONTIGMEM " 685 #ifdef CONFIG_NUMA 686 "NUMA " 687 #endif 688 #endif 689 690 #ifdef CONFIG_DEBUG_SPINLOCK 691 "DEBUG_SPINLOCK " 692 #endif 693 #ifdef CONFIG_MAGIC_SYSRQ 694 "MAGIC_SYSRQ " 695 #endif 696 "\n"); 697 698 printk("Command line: %s\n", command_line); 699 700 /* 701 * Sync up the HAE. 702 * Save the SRM's current value for restoration. 703 */ 704 srm_hae = *alpha_mv.hae_register; 705 __set_hae(alpha_mv.hae_cache); 706 707 /* Reset enable correctable error reports. */ 708 wrmces(0x7); 709 710 /* Find our memory. */ 711 setup_memory(kernel_end); 712 713 /* First guess at cpu cache sizes. Do this before init_arch. */ 714 determine_cpu_caches(cpu->type); 715 716 /* Initialize the machine. Usually has to do with setting up 717 DMA windows and the like. */ 718 if (alpha_mv.init_arch) 719 alpha_mv.init_arch(); 720 721 /* Reserve standard resources. */ 722 reserve_std_resources(); 723 724 /* 725 * Give us a default console. TGA users will see nothing until 726 * chr_dev_init is called, rather late in the boot sequence. 727 */ 728 729 #ifdef CONFIG_VT 730 #if defined(CONFIG_VGA_CONSOLE) 731 conswitchp = &vga_con; 732 #elif defined(CONFIG_DUMMY_CONSOLE) 733 conswitchp = &dummy_con; 734 #endif 735 #endif 736 737 /* Default root filesystem to sda2. */ 738 ROOT_DEV = Root_SDA2; 739 740 #ifdef CONFIG_EISA 741 /* FIXME: only set this when we actually have EISA in this box? */ 742 EISA_bus = 1; 743 #endif 744 745 /* 746 * Check ASN in HWRPB for validity, report if bad. 747 * FIXME: how was this failing? Should we trust it instead, 748 * and copy the value into alpha_mv.max_asn? 749 */ 750 751 if (hwrpb->max_asn != MAX_ASN) { 752 printk("Max ASN from HWRPB is bad (0x%lx)\n", hwrpb->max_asn); 753 } 754 755 /* 756 * Identify the flock of penguins. 757 */ 758 759 #ifdef CONFIG_SMP 760 setup_smp(); 761 #endif 762 paging_init(); 763 } 764 765 static char sys_unknown[] = "Unknown"; 766 static char systype_names[][16] = { 767 "0", 768 "ADU", "Cobra", "Ruby", "Flamingo", "Mannequin", "Jensen", 769 "Pelican", "Morgan", "Sable", "Medulla", "Noname", 770 "Turbolaser", "Avanti", "Mustang", "Alcor", "Tradewind", 771 "Mikasa", "EB64", "EB66", "EB64+", "AlphaBook1", 772 "Rawhide", "K2", "Lynx", "XL", "EB164", "Noritake", 773 "Cortex", "29", "Miata", "XXM", "Takara", "Yukon", 774 "Tsunami", "Wildfire", "CUSCO", "Eiger", "Titan", "Marvel" 775 }; 776 777 static char unofficial_names[][8] = {"100", "Ruffian"}; 778 779 static char api_names[][16] = {"200", "Nautilus"}; 780 781 static char eb164_names[][8] = {"EB164", "PC164", "LX164", "SX164", "RX164"}; 782 static int eb164_indices[] = {0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4}; 783 784 static char alcor_names[][16] = {"Alcor", "Maverick", "Bret"}; 785 static int alcor_indices[] = {0,0,0,1,1,1,0,0,0,0,0,0,2,2,2,2,2,2}; 786 787 static char eb64p_names[][16] = {"EB64+", "Cabriolet", "AlphaPCI64"}; 788 static int eb64p_indices[] = {0,0,1,2}; 789 790 static char eb66_names[][8] = {"EB66", "EB66+"}; 791 static int eb66_indices[] = {0,0,1}; 792 793 static char marvel_names[][16] = { 794 "Marvel/EV7" 795 }; 796 static int marvel_indices[] = { 0 }; 797 798 static char rawhide_names[][16] = { 799 "Dodge", "Wrangler", "Durango", "Tincup", "DaVinci" 800 }; 801 static int rawhide_indices[] = {0,0,0,1,1,2,2,3,3,4,4}; 802 803 static char titan_names[][16] = { 804 "DEFAULT", "Privateer", "Falcon", "Granite" 805 }; 806 static int titan_indices[] = {0,1,2,2,3}; 807 808 static char tsunami_names[][16] = { 809 "0", "DP264", "Warhol", "Windjammer", "Monet", "Clipper", 810 "Goldrush", "Webbrick", "Catamaran", "Brisbane", "Melbourne", 811 "Flying Clipper", "Shark" 812 }; 813 static int tsunami_indices[] = {0,1,2,3,4,5,6,7,8,9,10,11,12}; 814 815 static struct alpha_machine_vector * __init 816 get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu) 817 { 818 static struct alpha_machine_vector *systype_vecs[] __initdata = 819 { 820 NULL, /* 0 */ 821 NULL, /* ADU */ 822 NULL, /* Cobra */ 823 NULL, /* Ruby */ 824 NULL, /* Flamingo */ 825 NULL, /* Mannequin */ 826 &jensen_mv, 827 NULL, /* Pelican */ 828 NULL, /* Morgan */ 829 NULL, /* Sable -- see below. */ 830 NULL, /* Medulla */ 831 &noname_mv, 832 NULL, /* Turbolaser */ 833 &avanti_mv, 834 NULL, /* Mustang */ 835 NULL, /* Alcor, Bret, Maverick. HWRPB inaccurate? */ 836 NULL, /* Tradewind */ 837 NULL, /* Mikasa -- see below. */ 838 NULL, /* EB64 */ 839 NULL, /* EB66 -- see variation. */ 840 NULL, /* EB64+ -- see variation. */ 841 &alphabook1_mv, 842 &rawhide_mv, 843 NULL, /* K2 */ 844 &lynx_mv, /* Lynx */ 845 &xl_mv, 846 NULL, /* EB164 -- see variation. */ 847 NULL, /* Noritake -- see below. */ 848 NULL, /* Cortex */ 849 NULL, /* 29 */ 850 &miata_mv, 851 NULL, /* XXM */ 852 &takara_mv, 853 NULL, /* Yukon */ 854 NULL, /* Tsunami -- see variation. */ 855 &wildfire_mv, /* Wildfire */ 856 NULL, /* CUSCO */ 857 &eiger_mv, /* Eiger */ 858 NULL, /* Titan */ 859 NULL, /* Marvel */ 860 }; 861 862 static struct alpha_machine_vector *unofficial_vecs[] __initdata = 863 { 864 NULL, /* 100 */ 865 &ruffian_mv, 866 }; 867 868 static struct alpha_machine_vector *api_vecs[] __initdata = 869 { 870 NULL, /* 200 */ 871 &nautilus_mv, 872 }; 873 874 static struct alpha_machine_vector *alcor_vecs[] __initdata = 875 { 876 &alcor_mv, &xlt_mv, &xlt_mv 877 }; 878 879 static struct alpha_machine_vector *eb164_vecs[] __initdata = 880 { 881 &eb164_mv, &pc164_mv, &lx164_mv, &sx164_mv, &rx164_mv 882 }; 883 884 static struct alpha_machine_vector *eb64p_vecs[] __initdata = 885 { 886 &eb64p_mv, 887 &cabriolet_mv, 888 &cabriolet_mv /* AlphaPCI64 */ 889 }; 890 891 static struct alpha_machine_vector *eb66_vecs[] __initdata = 892 { 893 &eb66_mv, 894 &eb66p_mv 895 }; 896 897 static struct alpha_machine_vector *marvel_vecs[] __initdata = 898 { 899 &marvel_ev7_mv, 900 }; 901 902 static struct alpha_machine_vector *titan_vecs[] __initdata = 903 { 904 &titan_mv, /* default */ 905 &privateer_mv, /* privateer */ 906 &titan_mv, /* falcon */ 907 &privateer_mv, /* granite */ 908 }; 909 910 static struct alpha_machine_vector *tsunami_vecs[] __initdata = 911 { 912 NULL, 913 &dp264_mv, /* dp264 */ 914 &dp264_mv, /* warhol */ 915 &dp264_mv, /* windjammer */ 916 &monet_mv, /* monet */ 917 &clipper_mv, /* clipper */ 918 &dp264_mv, /* goldrush */ 919 &webbrick_mv, /* webbrick */ 920 &dp264_mv, /* catamaran */ 921 NULL, /* brisbane? */ 922 NULL, /* melbourne? */ 923 NULL, /* flying clipper? */ 924 &shark_mv, /* shark */ 925 }; 926 927 /* ??? Do we need to distinguish between Rawhides? */ 928 929 struct alpha_machine_vector *vec; 930 931 /* Search the system tables first... */ 932 vec = NULL; 933 if (type < ARRAY_SIZE(systype_vecs)) { 934 vec = systype_vecs[type]; 935 } else if ((type > ST_API_BIAS) && 936 (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) { 937 vec = api_vecs[type - ST_API_BIAS]; 938 } else if ((type > ST_UNOFFICIAL_BIAS) && 939 (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) { 940 vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS]; 941 } 942 943 /* If we've not found one, try for a variation. */ 944 945 if (!vec) { 946 /* Member ID is a bit-field. */ 947 unsigned long member = (variation >> 10) & 0x3f; 948 949 cpu &= 0xffffffff; /* make it usable */ 950 951 switch (type) { 952 case ST_DEC_ALCOR: 953 if (member < ARRAY_SIZE(alcor_indices)) 954 vec = alcor_vecs[alcor_indices[member]]; 955 break; 956 case ST_DEC_EB164: 957 if (member < ARRAY_SIZE(eb164_indices)) 958 vec = eb164_vecs[eb164_indices[member]]; 959 /* PC164 may show as EB164 variation with EV56 CPU, 960 but, since no true EB164 had anything but EV5... */ 961 if (vec == &eb164_mv && cpu == EV56_CPU) 962 vec = &pc164_mv; 963 break; 964 case ST_DEC_EB64P: 965 if (member < ARRAY_SIZE(eb64p_indices)) 966 vec = eb64p_vecs[eb64p_indices[member]]; 967 break; 968 case ST_DEC_EB66: 969 if (member < ARRAY_SIZE(eb66_indices)) 970 vec = eb66_vecs[eb66_indices[member]]; 971 break; 972 case ST_DEC_MARVEL: 973 if (member < ARRAY_SIZE(marvel_indices)) 974 vec = marvel_vecs[marvel_indices[member]]; 975 break; 976 case ST_DEC_TITAN: 977 vec = titan_vecs[0]; /* default */ 978 if (member < ARRAY_SIZE(titan_indices)) 979 vec = titan_vecs[titan_indices[member]]; 980 break; 981 case ST_DEC_TSUNAMI: 982 if (member < ARRAY_SIZE(tsunami_indices)) 983 vec = tsunami_vecs[tsunami_indices[member]]; 984 break; 985 case ST_DEC_1000: 986 if (cpu == EV5_CPU || cpu == EV56_CPU) 987 vec = &mikasa_primo_mv; 988 else 989 vec = &mikasa_mv; 990 break; 991 case ST_DEC_NORITAKE: 992 if (cpu == EV5_CPU || cpu == EV56_CPU) 993 vec = &noritake_primo_mv; 994 else 995 vec = &noritake_mv; 996 break; 997 case ST_DEC_2100_A500: 998 if (cpu == EV5_CPU || cpu == EV56_CPU) 999 vec = &sable_gamma_mv; 1000 else 1001 vec = &sable_mv; 1002 break; 1003 } 1004 } 1005 return vec; 1006 } 1007 1008 static struct alpha_machine_vector * __init 1009 get_sysvec_byname(const char *name) 1010 { 1011 static struct alpha_machine_vector *all_vecs[] __initdata = 1012 { 1013 &alcor_mv, 1014 &alphabook1_mv, 1015 &avanti_mv, 1016 &cabriolet_mv, 1017 &clipper_mv, 1018 &dp264_mv, 1019 &eb164_mv, 1020 &eb64p_mv, 1021 &eb66_mv, 1022 &eb66p_mv, 1023 &eiger_mv, 1024 &jensen_mv, 1025 &lx164_mv, 1026 &lynx_mv, 1027 &miata_mv, 1028 &mikasa_mv, 1029 &mikasa_primo_mv, 1030 &monet_mv, 1031 &nautilus_mv, 1032 &noname_mv, 1033 &noritake_mv, 1034 &noritake_primo_mv, 1035 &p2k_mv, 1036 &pc164_mv, 1037 &privateer_mv, 1038 &rawhide_mv, 1039 &ruffian_mv, 1040 &rx164_mv, 1041 &sable_mv, 1042 &sable_gamma_mv, 1043 &shark_mv, 1044 &sx164_mv, 1045 &takara_mv, 1046 &webbrick_mv, 1047 &wildfire_mv, 1048 &xl_mv, 1049 &xlt_mv 1050 }; 1051 1052 size_t i; 1053 1054 for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) { 1055 struct alpha_machine_vector *mv = all_vecs[i]; 1056 if (strcasecmp(mv->vector_name, name) == 0) 1057 return mv; 1058 } 1059 return NULL; 1060 } 1061 1062 static void 1063 get_sysnames(unsigned long type, unsigned long variation, unsigned long cpu, 1064 char **type_name, char **variation_name) 1065 { 1066 unsigned long member; 1067 1068 /* If not in the tables, make it UNKNOWN, 1069 else set type name to family */ 1070 if (type < ARRAY_SIZE(systype_names)) { 1071 *type_name = systype_names[type]; 1072 } else if ((type > ST_API_BIAS) && 1073 (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) { 1074 *type_name = api_names[type - ST_API_BIAS]; 1075 } else if ((type > ST_UNOFFICIAL_BIAS) && 1076 (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) { 1077 *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS]; 1078 } else { 1079 *type_name = sys_unknown; 1080 *variation_name = sys_unknown; 1081 return; 1082 } 1083 1084 /* Set variation to "0"; if variation is zero, done. */ 1085 *variation_name = systype_names[0]; 1086 if (variation == 0) { 1087 return; 1088 } 1089 1090 member = (variation >> 10) & 0x3f; /* member ID is a bit-field */ 1091 1092 cpu &= 0xffffffff; /* make it usable */ 1093 1094 switch (type) { /* select by family */ 1095 default: /* default to variation "0" for now */ 1096 break; 1097 case ST_DEC_EB164: 1098 if (member >= ARRAY_SIZE(eb164_indices)) 1099 break; 1100 *variation_name = eb164_names[eb164_indices[member]]; 1101 /* PC164 may show as EB164 variation, but with EV56 CPU, 1102 so, since no true EB164 had anything but EV5... */ 1103 if (eb164_indices[member] == 0 && cpu == EV56_CPU) 1104 *variation_name = eb164_names[1]; /* make it PC164 */ 1105 break; 1106 case ST_DEC_ALCOR: 1107 if (member < ARRAY_SIZE(alcor_indices)) 1108 *variation_name = alcor_names[alcor_indices[member]]; 1109 break; 1110 case ST_DEC_EB64P: 1111 if (member < ARRAY_SIZE(eb64p_indices)) 1112 *variation_name = eb64p_names[eb64p_indices[member]]; 1113 break; 1114 case ST_DEC_EB66: 1115 if (member < ARRAY_SIZE(eb66_indices)) 1116 *variation_name = eb66_names[eb66_indices[member]]; 1117 break; 1118 case ST_DEC_MARVEL: 1119 if (member < ARRAY_SIZE(marvel_indices)) 1120 *variation_name = marvel_names[marvel_indices[member]]; 1121 break; 1122 case ST_DEC_RAWHIDE: 1123 if (member < ARRAY_SIZE(rawhide_indices)) 1124 *variation_name = rawhide_names[rawhide_indices[member]]; 1125 break; 1126 case ST_DEC_TITAN: 1127 *variation_name = titan_names[0]; /* default */ 1128 if (member < ARRAY_SIZE(titan_indices)) 1129 *variation_name = titan_names[titan_indices[member]]; 1130 break; 1131 case ST_DEC_TSUNAMI: 1132 if (member < ARRAY_SIZE(tsunami_indices)) 1133 *variation_name = tsunami_names[tsunami_indices[member]]; 1134 break; 1135 } 1136 } 1137 1138 /* 1139 * A change was made to the HWRPB via an ECO and the following code 1140 * tracks a part of the ECO. In HWRPB versions less than 5, the ECO 1141 * was not implemented in the console firmware. If it's revision 5 or 1142 * greater we can get the name of the platform as an ASCII string from 1143 * the HWRPB. That's what this function does. It checks the revision 1144 * level and if the string is in the HWRPB it returns the address of 1145 * the string--a pointer to the name of the platform. 1146 * 1147 * Returns: 1148 * - Pointer to a ASCII string if it's in the HWRPB 1149 * - Pointer to a blank string if the data is not in the HWRPB. 1150 */ 1151 1152 static char * 1153 platform_string(void) 1154 { 1155 struct dsr_struct *dsr; 1156 static char unk_system_string[] = "N/A"; 1157 1158 /* Go to the console for the string pointer. 1159 * If the rpb_vers is not 5 or greater the rpb 1160 * is old and does not have this data in it. 1161 */ 1162 if (hwrpb->revision < 5) 1163 return (unk_system_string); 1164 else { 1165 /* The Dynamic System Recognition struct 1166 * has the system platform name starting 1167 * after the character count of the string. 1168 */ 1169 dsr = ((struct dsr_struct *) 1170 ((char *)hwrpb + hwrpb->dsr_offset)); 1171 return ((char *)dsr + (dsr->sysname_off + 1172 sizeof(long))); 1173 } 1174 } 1175 1176 static int 1177 get_nr_processors(struct percpu_struct *cpubase, unsigned long num) 1178 { 1179 struct percpu_struct *cpu; 1180 unsigned long i; 1181 int count = 0; 1182 1183 for (i = 0; i < num; i++) { 1184 cpu = (struct percpu_struct *) 1185 ((char *)cpubase + i*hwrpb->processor_size); 1186 if ((cpu->flags & 0x1cc) == 0x1cc) 1187 count++; 1188 } 1189 return count; 1190 } 1191 1192 static void 1193 show_cache_size (struct seq_file *f, const char *which, int shape) 1194 { 1195 if (shape == -1) 1196 seq_printf (f, "%s\t\t: n/a\n", which); 1197 else if (shape == 0) 1198 seq_printf (f, "%s\t\t: unknown\n", which); 1199 else 1200 seq_printf (f, "%s\t\t: %dK, %d-way, %db line\n", 1201 which, shape >> 10, shape & 15, 1202 1 << ((shape >> 4) & 15)); 1203 } 1204 1205 static int 1206 show_cpuinfo(struct seq_file *f, void *slot) 1207 { 1208 extern struct unaligned_stat { 1209 unsigned long count, va, pc; 1210 } unaligned[2]; 1211 1212 static char cpu_names[][8] = { 1213 "EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56", 1214 "EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL", 1215 "EV68CX", "EV7", "EV79", "EV69" 1216 }; 1217 1218 struct percpu_struct *cpu = slot; 1219 unsigned int cpu_index; 1220 char *cpu_name; 1221 char *systype_name; 1222 char *sysvariation_name; 1223 int nr_processors; 1224 unsigned long timer_freq; 1225 1226 cpu_index = (unsigned) (cpu->type - 1); 1227 cpu_name = "Unknown"; 1228 if (cpu_index < ARRAY_SIZE(cpu_names)) 1229 cpu_name = cpu_names[cpu_index]; 1230 1231 get_sysnames(hwrpb->sys_type, hwrpb->sys_variation, 1232 cpu->type, &systype_name, &sysvariation_name); 1233 1234 nr_processors = get_nr_processors(cpu, hwrpb->nr_processors); 1235 1236 #if CONFIG_HZ == 1024 || CONFIG_HZ == 1200 1237 timer_freq = (100UL * hwrpb->intr_freq) / 4096; 1238 #else 1239 timer_freq = 100UL * CONFIG_HZ; 1240 #endif 1241 1242 seq_printf(f, "cpu\t\t\t: Alpha\n" 1243 "cpu model\t\t: %s\n" 1244 "cpu variation\t\t: %ld\n" 1245 "cpu revision\t\t: %ld\n" 1246 "cpu serial number\t: %s\n" 1247 "system type\t\t: %s\n" 1248 "system variation\t: %s\n" 1249 "system revision\t\t: %ld\n" 1250 "system serial number\t: %s\n" 1251 "cycle frequency [Hz]\t: %lu %s\n" 1252 "timer frequency [Hz]\t: %lu.%02lu\n" 1253 "page size [bytes]\t: %ld\n" 1254 "phys. address bits\t: %ld\n" 1255 "max. addr. space #\t: %ld\n" 1256 "BogoMIPS\t\t: %lu.%02lu\n" 1257 "kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n" 1258 "user unaligned acc\t: %ld (pc=%lx,va=%lx)\n" 1259 "platform string\t\t: %s\n" 1260 "cpus detected\t\t: %d\n", 1261 cpu_name, cpu->variation, cpu->revision, 1262 (char*)cpu->serial_no, 1263 systype_name, sysvariation_name, hwrpb->sys_revision, 1264 (char*)hwrpb->ssn, 1265 est_cycle_freq ? : hwrpb->cycle_freq, 1266 est_cycle_freq ? "est." : "", 1267 timer_freq / 100, timer_freq % 100, 1268 hwrpb->pagesize, 1269 hwrpb->pa_bits, 1270 hwrpb->max_asn, 1271 loops_per_jiffy / (500000/HZ), 1272 (loops_per_jiffy / (5000/HZ)) % 100, 1273 unaligned[0].count, unaligned[0].pc, unaligned[0].va, 1274 unaligned[1].count, unaligned[1].pc, unaligned[1].va, 1275 platform_string(), nr_processors); 1276 1277 #ifdef CONFIG_SMP 1278 seq_printf(f, "cpus active\t\t: %u\n" 1279 "cpu active mask\t\t: %016lx\n", 1280 num_online_cpus(), cpumask_bits(cpu_possible_mask)[0]); 1281 #endif 1282 1283 show_cache_size (f, "L1 Icache", alpha_l1i_cacheshape); 1284 show_cache_size (f, "L1 Dcache", alpha_l1d_cacheshape); 1285 show_cache_size (f, "L2 cache", alpha_l2_cacheshape); 1286 show_cache_size (f, "L3 cache", alpha_l3_cacheshape); 1287 1288 return 0; 1289 } 1290 1291 static int __init 1292 read_mem_block(int *addr, int stride, int size) 1293 { 1294 long nloads = size / stride, cnt, tmp; 1295 1296 __asm__ __volatile__( 1297 " rpcc %0\n" 1298 "1: ldl %3,0(%2)\n" 1299 " subq %1,1,%1\n" 1300 /* Next two XORs introduce an explicit data dependency between 1301 consecutive loads in the loop, which will give us true load 1302 latency. */ 1303 " xor %3,%2,%2\n" 1304 " xor %3,%2,%2\n" 1305 " addq %2,%4,%2\n" 1306 " bne %1,1b\n" 1307 " rpcc %3\n" 1308 " subl %3,%0,%0\n" 1309 : "=&r" (cnt), "=&r" (nloads), "=&r" (addr), "=&r" (tmp) 1310 : "r" (stride), "1" (nloads), "2" (addr)); 1311 1312 return cnt / (size / stride); 1313 } 1314 1315 #define CSHAPE(totalsize, linesize, assoc) \ 1316 ((totalsize & ~0xff) | (linesize << 4) | assoc) 1317 1318 /* ??? EV5 supports up to 64M, but did the systems with more than 1319 16M of BCACHE ever exist? */ 1320 #define MAX_BCACHE_SIZE 16*1024*1024 1321 1322 /* Note that the offchip caches are direct mapped on all Alphas. */ 1323 static int __init 1324 external_cache_probe(int minsize, int width) 1325 { 1326 int cycles, prev_cycles = 1000000; 1327 int stride = 1 << width; 1328 long size = minsize, maxsize = MAX_BCACHE_SIZE * 2; 1329 1330 if (maxsize > (max_low_pfn + 1) << PAGE_SHIFT) 1331 maxsize = 1 << (ilog2(max_low_pfn + 1) + PAGE_SHIFT); 1332 1333 /* Get the first block cached. */ 1334 read_mem_block(__va(0), stride, size); 1335 1336 while (size < maxsize) { 1337 /* Get an average load latency in cycles. */ 1338 cycles = read_mem_block(__va(0), stride, size); 1339 if (cycles > prev_cycles * 2) { 1340 /* Fine, we exceed the cache. */ 1341 printk("%ldK Bcache detected; load hit latency %d " 1342 "cycles, load miss latency %d cycles\n", 1343 size >> 11, prev_cycles, cycles); 1344 return CSHAPE(size >> 1, width, 1); 1345 } 1346 /* Try to get the next block cached. */ 1347 read_mem_block(__va(size), stride, size); 1348 prev_cycles = cycles; 1349 size <<= 1; 1350 } 1351 return -1; /* No BCACHE found. */ 1352 } 1353 1354 static void __init 1355 determine_cpu_caches (unsigned int cpu_type) 1356 { 1357 int L1I, L1D, L2, L3; 1358 1359 switch (cpu_type) { 1360 case EV4_CPU: 1361 case EV45_CPU: 1362 { 1363 if (cpu_type == EV4_CPU) 1364 L1I = CSHAPE(8*1024, 5, 1); 1365 else 1366 L1I = CSHAPE(16*1024, 5, 1); 1367 L1D = L1I; 1368 L3 = -1; 1369 1370 /* BIU_CTL is a write-only Abox register. PALcode has a 1371 shadow copy, and may be available from some versions 1372 of the CSERVE PALcall. If we can get it, then 1373 1374 unsigned long biu_ctl, size; 1375 size = 128*1024 * (1 << ((biu_ctl >> 28) & 7)); 1376 L2 = CSHAPE (size, 5, 1); 1377 1378 Unfortunately, we can't rely on that. 1379 */ 1380 L2 = external_cache_probe(128*1024, 5); 1381 break; 1382 } 1383 1384 case LCA4_CPU: 1385 { 1386 unsigned long car, size; 1387 1388 L1I = L1D = CSHAPE(8*1024, 5, 1); 1389 L3 = -1; 1390 1391 car = *(vuip) phys_to_virt (0x120000078UL); 1392 size = 64*1024 * (1 << ((car >> 5) & 7)); 1393 /* No typo -- 8 byte cacheline size. Whodathunk. */ 1394 L2 = (car & 1 ? CSHAPE (size, 3, 1) : -1); 1395 break; 1396 } 1397 1398 case EV5_CPU: 1399 case EV56_CPU: 1400 { 1401 unsigned long sc_ctl, width; 1402 1403 L1I = L1D = CSHAPE(8*1024, 5, 1); 1404 1405 /* Check the line size of the Scache. */ 1406 sc_ctl = *(vulp) phys_to_virt (0xfffff000a8UL); 1407 width = sc_ctl & 0x1000 ? 6 : 5; 1408 L2 = CSHAPE (96*1024, width, 3); 1409 1410 /* BC_CONTROL and BC_CONFIG are write-only IPRs. PALcode 1411 has a shadow copy, and may be available from some versions 1412 of the CSERVE PALcall. If we can get it, then 1413 1414 unsigned long bc_control, bc_config, size; 1415 size = 1024*1024 * (1 << ((bc_config & 7) - 1)); 1416 L3 = (bc_control & 1 ? CSHAPE (size, width, 1) : -1); 1417 1418 Unfortunately, we can't rely on that. 1419 */ 1420 L3 = external_cache_probe(1024*1024, width); 1421 break; 1422 } 1423 1424 case PCA56_CPU: 1425 case PCA57_CPU: 1426 { 1427 if (cpu_type == PCA56_CPU) { 1428 L1I = CSHAPE(16*1024, 6, 1); 1429 L1D = CSHAPE(8*1024, 5, 1); 1430 } else { 1431 L1I = CSHAPE(32*1024, 6, 2); 1432 L1D = CSHAPE(16*1024, 5, 1); 1433 } 1434 L3 = -1; 1435 1436 #if 0 1437 unsigned long cbox_config, size; 1438 1439 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL); 1440 size = 512*1024 * (1 << ((cbox_config >> 12) & 3)); 1441 1442 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1); 1443 #else 1444 L2 = external_cache_probe(512*1024, 6); 1445 #endif 1446 break; 1447 } 1448 1449 case EV6_CPU: 1450 case EV67_CPU: 1451 case EV68CB_CPU: 1452 case EV68AL_CPU: 1453 case EV68CX_CPU: 1454 case EV69_CPU: 1455 L1I = L1D = CSHAPE(64*1024, 6, 2); 1456 L2 = external_cache_probe(1024*1024, 6); 1457 L3 = -1; 1458 break; 1459 1460 case EV7_CPU: 1461 case EV79_CPU: 1462 L1I = L1D = CSHAPE(64*1024, 6, 2); 1463 L2 = CSHAPE(7*1024*1024/4, 6, 7); 1464 L3 = -1; 1465 break; 1466 1467 default: 1468 /* Nothing known about this cpu type. */ 1469 L1I = L1D = L2 = L3 = 0; 1470 break; 1471 } 1472 1473 alpha_l1i_cacheshape = L1I; 1474 alpha_l1d_cacheshape = L1D; 1475 alpha_l2_cacheshape = L2; 1476 alpha_l3_cacheshape = L3; 1477 } 1478 1479 /* 1480 * We show only CPU #0 info. 1481 */ 1482 static void * 1483 c_start(struct seq_file *f, loff_t *pos) 1484 { 1485 return *pos ? NULL : (char *)hwrpb + hwrpb->processor_offset; 1486 } 1487 1488 static void * 1489 c_next(struct seq_file *f, void *v, loff_t *pos) 1490 { 1491 return NULL; 1492 } 1493 1494 static void 1495 c_stop(struct seq_file *f, void *v) 1496 { 1497 } 1498 1499 const struct seq_operations cpuinfo_op = { 1500 .start = c_start, 1501 .next = c_next, 1502 .stop = c_stop, 1503 .show = show_cpuinfo, 1504 }; 1505 1506 1507 static int 1508 alpha_panic_event(struct notifier_block *this, unsigned long event, void *ptr) 1509 { 1510 #if 1 1511 /* FIXME FIXME FIXME */ 1512 /* If we are using SRM and serial console, just hard halt here. */ 1513 if (alpha_using_srm && srmcons_output) 1514 __halt(); 1515 #endif 1516 return NOTIFY_DONE; 1517 } 1518 1519 static __init int add_pcspkr(void) 1520 { 1521 struct platform_device *pd; 1522 int ret; 1523 1524 pd = platform_device_alloc("pcspkr", -1); 1525 if (!pd) 1526 return -ENOMEM; 1527 1528 ret = platform_device_add(pd); 1529 if (ret) 1530 platform_device_put(pd); 1531 1532 return ret; 1533 } 1534 device_initcall(add_pcspkr); 1535