1 /* 2 * Architecture-specific setup. 3 * 4 * Copyright (C) 1998-2001, 2003-2004 Hewlett-Packard Co 5 * David Mosberger-Tang <davidm@hpl.hp.com> 6 * Stephane Eranian <eranian@hpl.hp.com> 7 * Copyright (C) 2000, 2004 Intel Corp 8 * Rohit Seth <rohit.seth@intel.com> 9 * Suresh Siddha <suresh.b.siddha@intel.com> 10 * Gordon Jin <gordon.jin@intel.com> 11 * Copyright (C) 1999 VA Linux Systems 12 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> 13 * 14 * 12/26/04 S.Siddha, G.Jin, R.Seth 15 * Add multi-threading and multi-core detection 16 * 11/12/01 D.Mosberger Convert get_cpuinfo() to seq_file based show_cpuinfo(). 17 * 04/04/00 D.Mosberger renamed cpu_initialized to cpu_online_map 18 * 03/31/00 R.Seth cpu_initialized and current->processor fixes 19 * 02/04/00 D.Mosberger some more get_cpuinfo fixes... 20 * 02/01/00 R.Seth fixed get_cpuinfo for SMP 21 * 01/07/99 S.Eranian added the support for command line argument 22 * 06/24/99 W.Drummond added boot_cpu_data. 23 * 05/28/05 Z. Menyhart Dynamic stride size for "flush_icache_range()" 24 */ 25 #include <linux/module.h> 26 #include <linux/init.h> 27 28 #include <linux/acpi.h> 29 #include <linux/bootmem.h> 30 #include <linux/console.h> 31 #include <linux/delay.h> 32 #include <linux/kernel.h> 33 #include <linux/reboot.h> 34 #include <linux/sched.h> 35 #include <linux/seq_file.h> 36 #include <linux/string.h> 37 #include <linux/threads.h> 38 #include <linux/screen_info.h> 39 #include <linux/dmi.h> 40 #include <linux/serial.h> 41 #include <linux/serial_core.h> 42 #include <linux/efi.h> 43 #include <linux/initrd.h> 44 #include <linux/pm.h> 45 #include <linux/cpufreq.h> 46 #include <linux/kexec.h> 47 #include <linux/crash_dump.h> 48 49 #include <asm/ia32.h> 50 #include <asm/machvec.h> 51 #include <asm/mca.h> 52 #include <asm/meminit.h> 53 #include <asm/page.h> 54 #include <asm/patch.h> 55 #include <asm/pgtable.h> 56 #include <asm/processor.h> 57 #include <asm/sal.h> 58 #include <asm/sections.h> 59 #include <asm/setup.h> 60 #include <asm/smp.h> 61 #include <asm/system.h> 62 #include <asm/tlbflush.h> 63 #include <asm/unistd.h> 64 #include <asm/hpsim.h> 65 66 #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE) 67 # error "struct cpuinfo_ia64 too big!" 68 #endif 69 70 #ifdef CONFIG_SMP 71 unsigned long __per_cpu_offset[NR_CPUS]; 72 EXPORT_SYMBOL(__per_cpu_offset); 73 #endif 74 75 DEFINE_PER_CPU(struct cpuinfo_ia64, cpu_info); 76 DEFINE_PER_CPU(unsigned long, local_per_cpu_offset); 77 unsigned long ia64_cycles_per_usec; 78 struct ia64_boot_param *ia64_boot_param; 79 struct screen_info screen_info; 80 unsigned long vga_console_iobase; 81 unsigned long vga_console_membase; 82 83 static struct resource data_resource = { 84 .name = "Kernel data", 85 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 86 }; 87 88 static struct resource code_resource = { 89 .name = "Kernel code", 90 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 91 }; 92 93 static struct resource bss_resource = { 94 .name = "Kernel bss", 95 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 96 }; 97 98 unsigned long ia64_max_cacheline_size; 99 100 int dma_get_cache_alignment(void) 101 { 102 return ia64_max_cacheline_size; 103 } 104 EXPORT_SYMBOL(dma_get_cache_alignment); 105 106 unsigned long ia64_iobase; /* virtual address for I/O accesses */ 107 EXPORT_SYMBOL(ia64_iobase); 108 struct io_space io_space[MAX_IO_SPACES]; 109 EXPORT_SYMBOL(io_space); 110 unsigned int num_io_spaces; 111 112 /* 113 * "flush_icache_range()" needs to know what processor dependent stride size to use 114 * when it makes i-cache(s) coherent with d-caches. 115 */ 116 #define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes by 32 bytes */ 117 unsigned long ia64_i_cache_stride_shift = ~0; 118 119 /* 120 * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This 121 * mask specifies a mask of address bits that must be 0 in order for two buffers to be 122 * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start 123 * address of the second buffer must be aligned to (merge_mask+1) in order to be 124 * mergeable). By default, we assume there is no I/O MMU which can merge physically 125 * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu 126 * page-size of 2^64. 127 */ 128 unsigned long ia64_max_iommu_merge_mask = ~0UL; 129 EXPORT_SYMBOL(ia64_max_iommu_merge_mask); 130 131 /* 132 * We use a special marker for the end of memory and it uses the extra (+1) slot 133 */ 134 struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata; 135 int num_rsvd_regions __initdata; 136 137 138 /* 139 * Filter incoming memory segments based on the primitive map created from the boot 140 * parameters. Segments contained in the map are removed from the memory ranges. A 141 * caller-specified function is called with the memory ranges that remain after filtering. 142 * This routine does not assume the incoming segments are sorted. 143 */ 144 int __init 145 filter_rsvd_memory (unsigned long start, unsigned long end, void *arg) 146 { 147 unsigned long range_start, range_end, prev_start; 148 void (*func)(unsigned long, unsigned long, int); 149 int i; 150 151 #if IGNORE_PFN0 152 if (start == PAGE_OFFSET) { 153 printk(KERN_WARNING "warning: skipping physical page 0\n"); 154 start += PAGE_SIZE; 155 if (start >= end) return 0; 156 } 157 #endif 158 /* 159 * lowest possible address(walker uses virtual) 160 */ 161 prev_start = PAGE_OFFSET; 162 func = arg; 163 164 for (i = 0; i < num_rsvd_regions; ++i) { 165 range_start = max(start, prev_start); 166 range_end = min(end, rsvd_region[i].start); 167 168 if (range_start < range_end) 169 call_pernode_memory(__pa(range_start), range_end - range_start, func); 170 171 /* nothing more available in this segment */ 172 if (range_end == end) return 0; 173 174 prev_start = rsvd_region[i].end; 175 } 176 /* end of memory marker allows full processing inside loop body */ 177 return 0; 178 } 179 180 /* 181 * Similar to "filter_rsvd_memory()", but the reserved memory ranges 182 * are not filtered out. 183 */ 184 int __init 185 filter_memory(unsigned long start, unsigned long end, void *arg) 186 { 187 void (*func)(unsigned long, unsigned long, int); 188 189 #if IGNORE_PFN0 190 if (start == PAGE_OFFSET) { 191 printk(KERN_WARNING "warning: skipping physical page 0\n"); 192 start += PAGE_SIZE; 193 if (start >= end) 194 return 0; 195 } 196 #endif 197 func = arg; 198 if (start < end) 199 call_pernode_memory(__pa(start), end - start, func); 200 return 0; 201 } 202 203 static void __init 204 sort_regions (struct rsvd_region *rsvd_region, int max) 205 { 206 int j; 207 208 /* simple bubble sorting */ 209 while (max--) { 210 for (j = 0; j < max; ++j) { 211 if (rsvd_region[j].start > rsvd_region[j+1].start) { 212 struct rsvd_region tmp; 213 tmp = rsvd_region[j]; 214 rsvd_region[j] = rsvd_region[j + 1]; 215 rsvd_region[j + 1] = tmp; 216 } 217 } 218 } 219 } 220 221 /* 222 * Request address space for all standard resources 223 */ 224 static int __init register_memory(void) 225 { 226 code_resource.start = ia64_tpa(_text); 227 code_resource.end = ia64_tpa(_etext) - 1; 228 data_resource.start = ia64_tpa(_etext); 229 data_resource.end = ia64_tpa(_edata) - 1; 230 bss_resource.start = ia64_tpa(__bss_start); 231 bss_resource.end = ia64_tpa(_end) - 1; 232 efi_initialize_iomem_resources(&code_resource, &data_resource, 233 &bss_resource); 234 235 return 0; 236 } 237 238 __initcall(register_memory); 239 240 241 #ifdef CONFIG_KEXEC 242 243 /* 244 * This function checks if the reserved crashkernel is allowed on the specific 245 * IA64 machine flavour. Machines without an IO TLB use swiotlb and require 246 * some memory below 4 GB (i.e. in 32 bit area), see the implementation of 247 * lib/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that 248 * in kdump case. See the comment in sba_init() in sba_iommu.c. 249 * 250 * So, the only machvec that really supports loading the kdump kernel 251 * over 4 GB is "sn2". 252 */ 253 static int __init check_crashkernel_memory(unsigned long pbase, size_t size) 254 { 255 if (ia64_platform_is("sn2") || ia64_platform_is("uv")) 256 return 1; 257 else 258 return pbase < (1UL << 32); 259 } 260 261 static void __init setup_crashkernel(unsigned long total, int *n) 262 { 263 unsigned long long base = 0, size = 0; 264 int ret; 265 266 ret = parse_crashkernel(boot_command_line, total, 267 &size, &base); 268 if (ret == 0 && size > 0) { 269 if (!base) { 270 sort_regions(rsvd_region, *n); 271 base = kdump_find_rsvd_region(size, 272 rsvd_region, *n); 273 } 274 275 if (!check_crashkernel_memory(base, size)) { 276 pr_warning("crashkernel: There would be kdump memory " 277 "at %ld GB but this is unusable because it " 278 "must\nbe below 4 GB. Change the memory " 279 "configuration of the machine.\n", 280 (unsigned long)(base >> 30)); 281 return; 282 } 283 284 if (base != ~0UL) { 285 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 286 "for crashkernel (System RAM: %ldMB)\n", 287 (unsigned long)(size >> 20), 288 (unsigned long)(base >> 20), 289 (unsigned long)(total >> 20)); 290 rsvd_region[*n].start = 291 (unsigned long)__va(base); 292 rsvd_region[*n].end = 293 (unsigned long)__va(base + size); 294 (*n)++; 295 crashk_res.start = base; 296 crashk_res.end = base + size - 1; 297 } 298 } 299 efi_memmap_res.start = ia64_boot_param->efi_memmap; 300 efi_memmap_res.end = efi_memmap_res.start + 301 ia64_boot_param->efi_memmap_size; 302 boot_param_res.start = __pa(ia64_boot_param); 303 boot_param_res.end = boot_param_res.start + 304 sizeof(*ia64_boot_param); 305 } 306 #else 307 static inline void __init setup_crashkernel(unsigned long total, int *n) 308 {} 309 #endif 310 311 /** 312 * reserve_memory - setup reserved memory areas 313 * 314 * Setup the reserved memory areas set aside for the boot parameters, 315 * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined, 316 * see include/asm-ia64/meminit.h if you need to define more. 317 */ 318 void __init 319 reserve_memory (void) 320 { 321 int n = 0; 322 unsigned long total_memory; 323 324 /* 325 * none of the entries in this table overlap 326 */ 327 rsvd_region[n].start = (unsigned long) ia64_boot_param; 328 rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param); 329 n++; 330 331 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap); 332 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size; 333 n++; 334 335 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line); 336 rsvd_region[n].end = (rsvd_region[n].start 337 + strlen(__va(ia64_boot_param->command_line)) + 1); 338 n++; 339 340 rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START); 341 rsvd_region[n].end = (unsigned long) ia64_imva(_end); 342 n++; 343 344 #ifdef CONFIG_BLK_DEV_INITRD 345 if (ia64_boot_param->initrd_start) { 346 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start); 347 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size; 348 n++; 349 } 350 #endif 351 352 #ifdef CONFIG_PROC_VMCORE 353 if (reserve_elfcorehdr(&rsvd_region[n].start, 354 &rsvd_region[n].end) == 0) 355 n++; 356 #endif 357 358 total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end); 359 n++; 360 361 setup_crashkernel(total_memory, &n); 362 363 /* end of memory marker */ 364 rsvd_region[n].start = ~0UL; 365 rsvd_region[n].end = ~0UL; 366 n++; 367 368 num_rsvd_regions = n; 369 BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n); 370 371 sort_regions(rsvd_region, num_rsvd_regions); 372 } 373 374 375 /** 376 * find_initrd - get initrd parameters from the boot parameter structure 377 * 378 * Grab the initrd start and end from the boot parameter struct given us by 379 * the boot loader. 380 */ 381 void __init 382 find_initrd (void) 383 { 384 #ifdef CONFIG_BLK_DEV_INITRD 385 if (ia64_boot_param->initrd_start) { 386 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start); 387 initrd_end = initrd_start+ia64_boot_param->initrd_size; 388 389 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n", 390 initrd_start, ia64_boot_param->initrd_size); 391 } 392 #endif 393 } 394 395 static void __init 396 io_port_init (void) 397 { 398 unsigned long phys_iobase; 399 400 /* 401 * Set `iobase' based on the EFI memory map or, failing that, the 402 * value firmware left in ar.k0. 403 * 404 * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute 405 * the port's virtual address, so ia32_load_state() loads it with a 406 * user virtual address. But in ia64 mode, glibc uses the 407 * *physical* address in ar.k0 to mmap the appropriate area from 408 * /dev/mem, and the inX()/outX() interfaces use MMIO. In both 409 * cases, user-mode can only use the legacy 0-64K I/O port space. 410 * 411 * ar.k0 is not involved in kernel I/O port accesses, which can use 412 * any of the I/O port spaces and are done via MMIO using the 413 * virtual mmio_base from the appropriate io_space[]. 414 */ 415 phys_iobase = efi_get_iobase(); 416 if (!phys_iobase) { 417 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE); 418 printk(KERN_INFO "No I/O port range found in EFI memory map, " 419 "falling back to AR.KR0 (0x%lx)\n", phys_iobase); 420 } 421 ia64_iobase = (unsigned long) ioremap(phys_iobase, 0); 422 ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase)); 423 424 /* setup legacy IO port space */ 425 io_space[0].mmio_base = ia64_iobase; 426 io_space[0].sparse = 1; 427 num_io_spaces = 1; 428 } 429 430 /** 431 * early_console_setup - setup debugging console 432 * 433 * Consoles started here require little enough setup that we can start using 434 * them very early in the boot process, either right after the machine 435 * vector initialization, or even before if the drivers can detect their hw. 436 * 437 * Returns non-zero if a console couldn't be setup. 438 */ 439 static inline int __init 440 early_console_setup (char *cmdline) 441 { 442 int earlycons = 0; 443 444 #ifdef CONFIG_SERIAL_SGI_L1_CONSOLE 445 { 446 extern int sn_serial_console_early_setup(void); 447 if (!sn_serial_console_early_setup()) 448 earlycons++; 449 } 450 #endif 451 #ifdef CONFIG_EFI_PCDP 452 if (!efi_setup_pcdp_console(cmdline)) 453 earlycons++; 454 #endif 455 if (!simcons_register()) 456 earlycons++; 457 458 return (earlycons) ? 0 : -1; 459 } 460 461 static inline void 462 mark_bsp_online (void) 463 { 464 #ifdef CONFIG_SMP 465 /* If we register an early console, allow CPU 0 to printk */ 466 cpu_set(smp_processor_id(), cpu_online_map); 467 #endif 468 } 469 470 static __initdata int nomca; 471 static __init int setup_nomca(char *s) 472 { 473 nomca = 1; 474 return 0; 475 } 476 early_param("nomca", setup_nomca); 477 478 #ifdef CONFIG_PROC_VMCORE 479 /* elfcorehdr= specifies the location of elf core header 480 * stored by the crashed kernel. 481 */ 482 static int __init parse_elfcorehdr(char *arg) 483 { 484 if (!arg) 485 return -EINVAL; 486 487 elfcorehdr_addr = memparse(arg, &arg); 488 return 0; 489 } 490 early_param("elfcorehdr", parse_elfcorehdr); 491 492 int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end) 493 { 494 unsigned long length; 495 496 /* We get the address using the kernel command line, 497 * but the size is extracted from the EFI tables. 498 * Both address and size are required for reservation 499 * to work properly. 500 */ 501 502 if (elfcorehdr_addr >= ELFCORE_ADDR_MAX) 503 return -EINVAL; 504 505 if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) { 506 elfcorehdr_addr = ELFCORE_ADDR_MAX; 507 return -EINVAL; 508 } 509 510 *start = (unsigned long)__va(elfcorehdr_addr); 511 *end = *start + length; 512 return 0; 513 } 514 515 #endif /* CONFIG_PROC_VMCORE */ 516 517 void __init 518 setup_arch (char **cmdline_p) 519 { 520 unw_init(); 521 522 ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist); 523 524 *cmdline_p = __va(ia64_boot_param->command_line); 525 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); 526 527 efi_init(); 528 io_port_init(); 529 530 #ifdef CONFIG_IA64_GENERIC 531 /* machvec needs to be parsed from the command line 532 * before parse_early_param() is called to ensure 533 * that ia64_mv is initialised before any command line 534 * settings may cause console setup to occur 535 */ 536 machvec_init_from_cmdline(*cmdline_p); 537 #endif 538 539 parse_early_param(); 540 541 if (early_console_setup(*cmdline_p) == 0) 542 mark_bsp_online(); 543 544 #ifdef CONFIG_ACPI 545 /* Initialize the ACPI boot-time table parser */ 546 acpi_table_init(); 547 # ifdef CONFIG_ACPI_NUMA 548 acpi_numa_init(); 549 per_cpu_scan_finalize((cpus_weight(early_cpu_possible_map) == 0 ? 550 32 : cpus_weight(early_cpu_possible_map)), additional_cpus); 551 # endif 552 #else 553 # ifdef CONFIG_SMP 554 smp_build_cpu_map(); /* happens, e.g., with the Ski simulator */ 555 # endif 556 #endif /* CONFIG_APCI_BOOT */ 557 558 find_memory(); 559 560 /* process SAL system table: */ 561 ia64_sal_init(__va(efi.sal_systab)); 562 563 #ifdef CONFIG_SMP 564 cpu_physical_id(0) = hard_smp_processor_id(); 565 #endif 566 567 cpu_init(); /* initialize the bootstrap CPU */ 568 mmu_context_init(); /* initialize context_id bitmap */ 569 570 check_sal_cache_flush(); 571 572 #ifdef CONFIG_ACPI 573 acpi_boot_init(); 574 #endif 575 576 #ifdef CONFIG_VT 577 if (!conswitchp) { 578 # if defined(CONFIG_DUMMY_CONSOLE) 579 conswitchp = &dummy_con; 580 # endif 581 # if defined(CONFIG_VGA_CONSOLE) 582 /* 583 * Non-legacy systems may route legacy VGA MMIO range to system 584 * memory. vga_con probes the MMIO hole, so memory looks like 585 * a VGA device to it. The EFI memory map can tell us if it's 586 * memory so we can avoid this problem. 587 */ 588 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY) 589 conswitchp = &vga_con; 590 # endif 591 } 592 #endif 593 594 /* enable IA-64 Machine Check Abort Handling unless disabled */ 595 if (!nomca) 596 ia64_mca_init(); 597 598 platform_setup(cmdline_p); 599 paging_init(); 600 } 601 602 /* 603 * Display cpu info for all CPUs. 604 */ 605 static int 606 show_cpuinfo (struct seq_file *m, void *v) 607 { 608 #ifdef CONFIG_SMP 609 # define lpj c->loops_per_jiffy 610 # define cpunum c->cpu 611 #else 612 # define lpj loops_per_jiffy 613 # define cpunum 0 614 #endif 615 static struct { 616 unsigned long mask; 617 const char *feature_name; 618 } feature_bits[] = { 619 { 1UL << 0, "branchlong" }, 620 { 1UL << 1, "spontaneous deferral"}, 621 { 1UL << 2, "16-byte atomic ops" } 622 }; 623 char features[128], *cp, *sep; 624 struct cpuinfo_ia64 *c = v; 625 unsigned long mask; 626 unsigned long proc_freq; 627 int i, size; 628 629 mask = c->features; 630 631 /* build the feature string: */ 632 memcpy(features, "standard", 9); 633 cp = features; 634 size = sizeof(features); 635 sep = ""; 636 for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) { 637 if (mask & feature_bits[i].mask) { 638 cp += snprintf(cp, size, "%s%s", sep, 639 feature_bits[i].feature_name), 640 sep = ", "; 641 mask &= ~feature_bits[i].mask; 642 size = sizeof(features) - (cp - features); 643 } 644 } 645 if (mask && size > 1) { 646 /* print unknown features as a hex value */ 647 snprintf(cp, size, "%s0x%lx", sep, mask); 648 } 649 650 proc_freq = cpufreq_quick_get(cpunum); 651 if (!proc_freq) 652 proc_freq = c->proc_freq / 1000; 653 654 seq_printf(m, 655 "processor : %d\n" 656 "vendor : %s\n" 657 "arch : IA-64\n" 658 "family : %u\n" 659 "model : %u\n" 660 "model name : %s\n" 661 "revision : %u\n" 662 "archrev : %u\n" 663 "features : %s\n" 664 "cpu number : %lu\n" 665 "cpu regs : %u\n" 666 "cpu MHz : %lu.%03lu\n" 667 "itc MHz : %lu.%06lu\n" 668 "BogoMIPS : %lu.%02lu\n", 669 cpunum, c->vendor, c->family, c->model, 670 c->model_name, c->revision, c->archrev, 671 features, c->ppn, c->number, 672 proc_freq / 1000, proc_freq % 1000, 673 c->itc_freq / 1000000, c->itc_freq % 1000000, 674 lpj*HZ/500000, (lpj*HZ/5000) % 100); 675 #ifdef CONFIG_SMP 676 seq_printf(m, "siblings : %u\n", cpus_weight(cpu_core_map[cpunum])); 677 if (c->socket_id != -1) 678 seq_printf(m, "physical id: %u\n", c->socket_id); 679 if (c->threads_per_core > 1 || c->cores_per_socket > 1) 680 seq_printf(m, 681 "core id : %u\n" 682 "thread id : %u\n", 683 c->core_id, c->thread_id); 684 #endif 685 seq_printf(m,"\n"); 686 687 return 0; 688 } 689 690 static void * 691 c_start (struct seq_file *m, loff_t *pos) 692 { 693 #ifdef CONFIG_SMP 694 while (*pos < NR_CPUS && !cpu_isset(*pos, cpu_online_map)) 695 ++*pos; 696 #endif 697 return *pos < NR_CPUS ? cpu_data(*pos) : NULL; 698 } 699 700 static void * 701 c_next (struct seq_file *m, void *v, loff_t *pos) 702 { 703 ++*pos; 704 return c_start(m, pos); 705 } 706 707 static void 708 c_stop (struct seq_file *m, void *v) 709 { 710 } 711 712 const struct seq_operations cpuinfo_op = { 713 .start = c_start, 714 .next = c_next, 715 .stop = c_stop, 716 .show = show_cpuinfo 717 }; 718 719 #define MAX_BRANDS 8 720 static char brandname[MAX_BRANDS][128]; 721 722 static char * __cpuinit 723 get_model_name(__u8 family, __u8 model) 724 { 725 static int overflow; 726 char brand[128]; 727 int i; 728 729 memcpy(brand, "Unknown", 8); 730 if (ia64_pal_get_brand_info(brand)) { 731 if (family == 0x7) 732 memcpy(brand, "Merced", 7); 733 else if (family == 0x1f) switch (model) { 734 case 0: memcpy(brand, "McKinley", 9); break; 735 case 1: memcpy(brand, "Madison", 8); break; 736 case 2: memcpy(brand, "Madison up to 9M cache", 23); break; 737 } 738 } 739 for (i = 0; i < MAX_BRANDS; i++) 740 if (strcmp(brandname[i], brand) == 0) 741 return brandname[i]; 742 for (i = 0; i < MAX_BRANDS; i++) 743 if (brandname[i][0] == '\0') 744 return strcpy(brandname[i], brand); 745 if (overflow++ == 0) 746 printk(KERN_ERR 747 "%s: Table overflow. Some processor model information will be missing\n", 748 __func__); 749 return "Unknown"; 750 } 751 752 static void __cpuinit 753 identify_cpu (struct cpuinfo_ia64 *c) 754 { 755 union { 756 unsigned long bits[5]; 757 struct { 758 /* id 0 & 1: */ 759 char vendor[16]; 760 761 /* id 2 */ 762 u64 ppn; /* processor serial number */ 763 764 /* id 3: */ 765 unsigned number : 8; 766 unsigned revision : 8; 767 unsigned model : 8; 768 unsigned family : 8; 769 unsigned archrev : 8; 770 unsigned reserved : 24; 771 772 /* id 4: */ 773 u64 features; 774 } field; 775 } cpuid; 776 pal_vm_info_1_u_t vm1; 777 pal_vm_info_2_u_t vm2; 778 pal_status_t status; 779 unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */ 780 int i; 781 for (i = 0; i < 5; ++i) 782 cpuid.bits[i] = ia64_get_cpuid(i); 783 784 memcpy(c->vendor, cpuid.field.vendor, 16); 785 #ifdef CONFIG_SMP 786 c->cpu = smp_processor_id(); 787 788 /* below default values will be overwritten by identify_siblings() 789 * for Multi-Threading/Multi-Core capable CPUs 790 */ 791 c->threads_per_core = c->cores_per_socket = c->num_log = 1; 792 c->socket_id = -1; 793 794 identify_siblings(c); 795 796 if (c->threads_per_core > smp_num_siblings) 797 smp_num_siblings = c->threads_per_core; 798 #endif 799 c->ppn = cpuid.field.ppn; 800 c->number = cpuid.field.number; 801 c->revision = cpuid.field.revision; 802 c->model = cpuid.field.model; 803 c->family = cpuid.field.family; 804 c->archrev = cpuid.field.archrev; 805 c->features = cpuid.field.features; 806 c->model_name = get_model_name(c->family, c->model); 807 808 status = ia64_pal_vm_summary(&vm1, &vm2); 809 if (status == PAL_STATUS_SUCCESS) { 810 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb; 811 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size; 812 } 813 c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1)); 814 c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1)); 815 } 816 817 void __init 818 setup_per_cpu_areas (void) 819 { 820 /* start_kernel() requires this... */ 821 #ifdef CONFIG_ACPI_HOTPLUG_CPU 822 prefill_possible_map(); 823 #endif 824 } 825 826 /* 827 * Calculate the max. cache line size. 828 * 829 * In addition, the minimum of the i-cache stride sizes is calculated for 830 * "flush_icache_range()". 831 */ 832 static void __cpuinit 833 get_max_cacheline_size (void) 834 { 835 unsigned long line_size, max = 1; 836 u64 l, levels, unique_caches; 837 pal_cache_config_info_t cci; 838 s64 status; 839 840 status = ia64_pal_cache_summary(&levels, &unique_caches); 841 if (status != 0) { 842 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n", 843 __func__, status); 844 max = SMP_CACHE_BYTES; 845 /* Safest setup for "flush_icache_range()" */ 846 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT; 847 goto out; 848 } 849 850 for (l = 0; l < levels; ++l) { 851 status = ia64_pal_cache_config_info(l, /* cache_type (data_or_unified)= */ 2, 852 &cci); 853 if (status != 0) { 854 printk(KERN_ERR 855 "%s: ia64_pal_cache_config_info(l=%lu, 2) failed (status=%ld)\n", 856 __func__, l, status); 857 max = SMP_CACHE_BYTES; 858 /* The safest setup for "flush_icache_range()" */ 859 cci.pcci_stride = I_CACHE_STRIDE_SHIFT; 860 cci.pcci_unified = 1; 861 } 862 line_size = 1 << cci.pcci_line_size; 863 if (line_size > max) 864 max = line_size; 865 if (!cci.pcci_unified) { 866 status = ia64_pal_cache_config_info(l, 867 /* cache_type (instruction)= */ 1, 868 &cci); 869 if (status != 0) { 870 printk(KERN_ERR 871 "%s: ia64_pal_cache_config_info(l=%lu, 1) failed (status=%ld)\n", 872 __func__, l, status); 873 /* The safest setup for "flush_icache_range()" */ 874 cci.pcci_stride = I_CACHE_STRIDE_SHIFT; 875 } 876 } 877 if (cci.pcci_stride < ia64_i_cache_stride_shift) 878 ia64_i_cache_stride_shift = cci.pcci_stride; 879 } 880 out: 881 if (max > ia64_max_cacheline_size) 882 ia64_max_cacheline_size = max; 883 } 884 885 /* 886 * cpu_init() initializes state that is per-CPU. This function acts 887 * as a 'CPU state barrier', nothing should get across. 888 */ 889 void __cpuinit 890 cpu_init (void) 891 { 892 extern void __cpuinit ia64_mmu_init (void *); 893 static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG; 894 unsigned long num_phys_stacked; 895 pal_vm_info_2_u_t vmi; 896 unsigned int max_ctx; 897 struct cpuinfo_ia64 *cpu_info; 898 void *cpu_data; 899 900 cpu_data = per_cpu_init(); 901 #ifdef CONFIG_SMP 902 /* 903 * insert boot cpu into sibling and core mapes 904 * (must be done after per_cpu area is setup) 905 */ 906 if (smp_processor_id() == 0) { 907 cpu_set(0, per_cpu(cpu_sibling_map, 0)); 908 cpu_set(0, cpu_core_map[0]); 909 } 910 #endif 911 912 /* 913 * We set ar.k3 so that assembly code in MCA handler can compute 914 * physical addresses of per cpu variables with a simple: 915 * phys = ar.k3 + &per_cpu_var 916 */ 917 ia64_set_kr(IA64_KR_PER_CPU_DATA, 918 ia64_tpa(cpu_data) - (long) __per_cpu_start); 919 920 get_max_cacheline_size(); 921 922 /* 923 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called 924 * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it 925 * depends on the data returned by identify_cpu(). We break the dependency by 926 * accessing cpu_data() through the canonical per-CPU address. 927 */ 928 cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start); 929 identify_cpu(cpu_info); 930 931 #ifdef CONFIG_MCKINLEY 932 { 933 # define FEATURE_SET 16 934 struct ia64_pal_retval iprv; 935 936 if (cpu_info->family == 0x1f) { 937 PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0); 938 if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80)) 939 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES, 940 (iprv.v1 | 0x80), FEATURE_SET, 0); 941 } 942 } 943 #endif 944 945 /* Clear the stack memory reserved for pt_regs: */ 946 memset(task_pt_regs(current), 0, sizeof(struct pt_regs)); 947 948 ia64_set_kr(IA64_KR_FPU_OWNER, 0); 949 950 /* 951 * Initialize the page-table base register to a global 952 * directory with all zeroes. This ensure that we can handle 953 * TLB-misses to user address-space even before we created the 954 * first user address-space. This may happen, e.g., due to 955 * aggressive use of lfetch.fault. 956 */ 957 ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page))); 958 959 /* 960 * Initialize default control register to defer speculative faults except 961 * for those arising from TLB misses, which are not deferred. The 962 * kernel MUST NOT depend on a particular setting of these bits (in other words, 963 * the kernel must have recovery code for all speculative accesses). Turn on 964 * dcr.lc as per recommendation by the architecture team. Most IA-32 apps 965 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll 966 * be fine). 967 */ 968 ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR 969 | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC)); 970 atomic_inc(&init_mm.mm_count); 971 current->active_mm = &init_mm; 972 if (current->mm) 973 BUG(); 974 975 ia64_mmu_init(ia64_imva(cpu_data)); 976 ia64_mca_cpu_init(ia64_imva(cpu_data)); 977 978 #ifdef CONFIG_IA32_SUPPORT 979 ia32_cpu_init(); 980 #endif 981 982 /* Clear ITC to eliminate sched_clock() overflows in human time. */ 983 ia64_set_itc(0); 984 985 /* disable all local interrupt sources: */ 986 ia64_set_itv(1 << 16); 987 ia64_set_lrr0(1 << 16); 988 ia64_set_lrr1(1 << 16); 989 ia64_setreg(_IA64_REG_CR_PMV, 1 << 16); 990 ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16); 991 992 /* clear TPR & XTP to enable all interrupt classes: */ 993 ia64_setreg(_IA64_REG_CR_TPR, 0); 994 995 /* Clear any pending interrupts left by SAL/EFI */ 996 while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR) 997 ia64_eoi(); 998 999 #ifdef CONFIG_SMP 1000 normal_xtp(); 1001 #endif 1002 1003 /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */ 1004 if (ia64_pal_vm_summary(NULL, &vmi) == 0) { 1005 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1; 1006 setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL); 1007 } else { 1008 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n"); 1009 max_ctx = (1U << 15) - 1; /* use architected minimum */ 1010 } 1011 while (max_ctx < ia64_ctx.max_ctx) { 1012 unsigned int old = ia64_ctx.max_ctx; 1013 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old) 1014 break; 1015 } 1016 1017 if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) { 1018 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical " 1019 "stacked regs\n"); 1020 num_phys_stacked = 96; 1021 } 1022 /* size of physical stacked register partition plus 8 bytes: */ 1023 if (num_phys_stacked > max_num_phys_stacked) { 1024 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8); 1025 max_num_phys_stacked = num_phys_stacked; 1026 } 1027 platform_cpu_init(); 1028 pm_idle = default_idle; 1029 } 1030 1031 void __init 1032 check_bugs (void) 1033 { 1034 ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles, 1035 (unsigned long) __end___mckinley_e9_bundles); 1036 } 1037 1038 static int __init run_dmi_scan(void) 1039 { 1040 dmi_scan_machine(); 1041 return 0; 1042 } 1043 core_initcall(run_dmi_scan); 1044