git.oblomov.eu Git - linux-2.6/blob - arch/x86/kernel/apic/x2apic_uv_x.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * SGI UV APIC functions (note: not an Intel compatible APIC)
   7  *
   8  * Copyright (C) 2007-2008 Silicon Graphics, Inc. All rights reserved.
   9  */
  10 #include <linux/cpumask.h>
  11 #include <linux/hardirq.h>
  12 #include <linux/proc_fs.h>
  13 #include <linux/threads.h>
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/string.h>
  17 #include <linux/ctype.h>
  18 #include <linux/sched.h>
  19 #include <linux/timer.h>
  20 #include <linux/cpu.h>
  21 #include <linux/init.h>
  22
  23 #include <asm/uv/uv_mmrs.h>
  24 #include <asm/uv/uv_hub.h>
  25 #include <asm/current.h>
  26 #include <asm/pgtable.h>
  27 #include <asm/uv/bios.h>
  28 #include <asm/uv/uv.h>
  29 #include <asm/apic.h>
  30 #include <asm/ipi.h>
  31 #include <asm/smp.h>
  32
  33 DEFINE_PER_CPU(int, x2apic_extra_bits);
  34
  35 static enum uv_system_type uv_system_type;
  36
  37 static int uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  38 {
  39         if (!strcmp(oem_id, "SGI")) {
  40                 if (!strcmp(oem_table_id, "UVL"))
  41                         uv_system_type = UV_LEGACY_APIC;
  42                 else if (!strcmp(oem_table_id, "UVX"))
  43                         uv_system_type = UV_X2APIC;
  44                 else if (!strcmp(oem_table_id, "UVH")) {
  45                         uv_system_type = UV_NON_UNIQUE_APIC;
  46                         return 1;
  47                 }
  48         }
  49         return 0;
  50 }
  51
  52 enum uv_system_type get_uv_system_type(void)
  53 {
  54         return uv_system_type;
  55 }
  56
  57 int is_uv_system(void)
  58 {
  59         return uv_system_type != UV_NONE;
  60 }
  61 EXPORT_SYMBOL_GPL(is_uv_system);
  62
  63 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
  64 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
  65
  66 struct uv_blade_info *uv_blade_info;
  67 EXPORT_SYMBOL_GPL(uv_blade_info);
  68
  69 short *uv_node_to_blade;
  70 EXPORT_SYMBOL_GPL(uv_node_to_blade);
  71
  72 short *uv_cpu_to_blade;
  73 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);
  74
  75 short uv_possible_blades;
  76 EXPORT_SYMBOL_GPL(uv_possible_blades);
  77
  78 unsigned long sn_rtc_cycles_per_second;
  79 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
  80
  81 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */
  82
  83 static const struct cpumask *uv_target_cpus(void)
  84 {
  85         return cpumask_of(0);
  86 }
  87
  88 static void uv_vector_allocation_domain(int cpu, struct cpumask *retmask)
  89 {
  90         cpumask_clear(retmask);
  91         cpumask_set_cpu(cpu, retmask);
  92 }
  93
  94 static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
  95 {
  96 #ifdef CONFIG_SMP
  97         unsigned long val;
  98         int pnode;
  99
 100         pnode = uv_apicid_to_pnode(phys_apicid);
 101         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 102             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 103             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 104             APIC_DM_INIT;
 105         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 106         mdelay(10);
 107
 108         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 109             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 110             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 111             APIC_DM_STARTUP;
 112         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 113
 114         atomic_set(&init_deasserted, 1);
 115 #endif
 116         return 0;
 117 }
 118
 119 static void uv_send_IPI_one(int cpu, int vector)
 120 {
 121         unsigned long apicid;
 122         int pnode;
 123
 124         apicid = per_cpu(x86_cpu_to_apicid, cpu);
 125         pnode = uv_apicid_to_pnode(apicid);
 126         uv_hub_send_ipi(pnode, apicid, vector);
 127 }
 128
 129 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
 130 {
 131         unsigned int cpu;
 132
 133         for_each_cpu(cpu, mask)
 134                 uv_send_IPI_one(cpu, vector);
 135 }
 136
 137 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
 138 {
 139         unsigned int this_cpu = smp_processor_id();
 140         unsigned int cpu;
 141
 142         for_each_cpu(cpu, mask) {
 143                 if (cpu != this_cpu)
 144                         uv_send_IPI_one(cpu, vector);
 145         }
 146 }
 147
 148 static void uv_send_IPI_allbutself(int vector)
 149 {
 150         unsigned int this_cpu = smp_processor_id();
 151         unsigned int cpu;
 152
 153         for_each_online_cpu(cpu) {
 154                 if (cpu != this_cpu)
 155                         uv_send_IPI_one(cpu, vector);
 156         }
 157 }
 158
 159 static void uv_send_IPI_all(int vector)
 160 {
 161         uv_send_IPI_mask(cpu_online_mask, vector);
 162 }
 163
 164 static int uv_apic_id_registered(void)
 165 {
 166         return 1;
 167 }
 168
 169 static void uv_init_apic_ldr(void)
 170 {
 171 }
 172
 173 static unsigned int uv_cpu_mask_to_apicid(const struct cpumask *cpumask)
 174 {
 175         /*
 176          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 177          * May as well be the first.
 178          */
 179         int cpu = cpumask_first(cpumask);
 180
 181         if ((unsigned)cpu < nr_cpu_ids)
 182                 return per_cpu(x86_cpu_to_apicid, cpu);
 183         else
 184                 return BAD_APICID;
 185 }
 186
 187 static unsigned int
 188 uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
 189                           const struct cpumask *andmask)
 190 {
 191         int cpu;
 192
 193         /*
 194          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 195          * May as well be the first.
 196          */
 197         for_each_cpu_and(cpu, cpumask, andmask) {
 198                 if (cpumask_test_cpu(cpu, cpu_online_mask))
 199                         break;
 200         }
 201         if (cpu < nr_cpu_ids)
 202                 return per_cpu(x86_cpu_to_apicid, cpu);
 203
 204         return BAD_APICID;
 205 }
 206
 207 static unsigned int x2apic_get_apic_id(unsigned long x)
 208 {
 209         unsigned int id;
 210
 211         WARN_ON(preemptible() && num_online_cpus() > 1);
 212         id = x | __get_cpu_var(x2apic_extra_bits);
 213
 214         return id;
 215 }
 216
 217 static unsigned long set_apic_id(unsigned int id)
 218 {
 219         unsigned long x;
 220
 221         /* maskout x2apic_extra_bits ? */
 222         x = id;
 223         return x;
 224 }
 225
 226 static unsigned int uv_read_apic_id(void)
 227 {
 228
 229         return x2apic_get_apic_id(apic_read(APIC_ID));
 230 }
 231
 232 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
 233 {
 234         return uv_read_apic_id() >> index_msb;
 235 }
 236
 237 static void uv_send_IPI_self(int vector)
 238 {
 239         apic_write(APIC_SELF_IPI, vector);
 240 }
 241
 242 struct apic apic_x2apic_uv_x = {
 243
 244         .name                           = "UV large system",
 245         .probe                          = NULL,
 246         .acpi_madt_oem_check            = uv_acpi_madt_oem_check,
 247         .apic_id_registered             = uv_apic_id_registered,
 248
 249         .irq_delivery_mode              = dest_Fixed,
 250         .irq_dest_mode                  = 1, /* logical */
 251
 252         .target_cpus                    = uv_target_cpus,
 253         .disable_esr                    = 0,
 254         .dest_logical                   = APIC_DEST_LOGICAL,
 255         .check_apicid_used              = NULL,
 256         .check_apicid_present           = NULL,
 257
 258         .vector_allocation_domain       = uv_vector_allocation_domain,
 259         .init_apic_ldr                  = uv_init_apic_ldr,
 260
 261         .ioapic_phys_id_map             = NULL,
 262         .setup_apic_routing             = NULL,
 263         .multi_timer_check              = NULL,
 264         .apicid_to_node                 = NULL,
 265         .cpu_to_logical_apicid          = NULL,
 266         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 267         .apicid_to_cpu_present          = NULL,
 268         .setup_portio_remap             = NULL,
 269         .check_phys_apicid_present      = default_check_phys_apicid_present,
 270         .enable_apic_mode               = NULL,
 271         .phys_pkg_id                    = uv_phys_pkg_id,
 272         .mps_oem_check                  = NULL,
 273
 274         .get_apic_id                    = x2apic_get_apic_id,
 275         .set_apic_id                    = set_apic_id,
 276         .apic_id_mask                   = 0xFFFFFFFFu,
 277
 278         .cpu_mask_to_apicid             = uv_cpu_mask_to_apicid,
 279         .cpu_mask_to_apicid_and         = uv_cpu_mask_to_apicid_and,
 280
 281         .send_IPI_mask                  = uv_send_IPI_mask,
 282         .send_IPI_mask_allbutself       = uv_send_IPI_mask_allbutself,
 283         .send_IPI_allbutself            = uv_send_IPI_allbutself,
 284         .send_IPI_all                   = uv_send_IPI_all,
 285         .send_IPI_self                  = uv_send_IPI_self,
 286
 287         .wakeup_secondary_cpu           = uv_wakeup_secondary,
 288         .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
 289         .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
 290         .wait_for_init_deassert         = NULL,
 291         .smp_callin_clear_local_apic    = NULL,
 292         .inquire_remote_apic            = NULL,
 293
 294         .read                           = native_apic_msr_read,
 295         .write                          = native_apic_msr_write,
 296         .icr_read                       = native_x2apic_icr_read,
 297         .icr_write                      = native_x2apic_icr_write,
 298         .wait_icr_idle                  = native_x2apic_wait_icr_idle,
 299         .safe_wait_icr_idle             = native_safe_x2apic_wait_icr_idle,
 300 };
 301
 302 static __cpuinit void set_x2apic_extra_bits(int pnode)
 303 {
 304         __get_cpu_var(x2apic_extra_bits) = (pnode << 6);
 305 }
 306
 307 /*
 308  * Called on boot cpu.
 309  */
 310 static __init int boot_pnode_to_blade(int pnode)
 311 {
 312         int blade;
 313
 314         for (blade = 0; blade < uv_num_possible_blades(); blade++)
 315                 if (pnode == uv_blade_info[blade].pnode)
 316                         return blade;
 317         BUG();
 318 }
 319
 320 struct redir_addr {
 321         unsigned long redirect;
 322         unsigned long alias;
 323 };
 324
 325 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
 326
 327 static __initdata struct redir_addr redir_addrs[] = {
 328         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
 329         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
 330         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
 331 };
 332
 333 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
 334 {
 335         union uvh_si_alias0_overlay_config_u alias;
 336         union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
 337         int i;
 338
 339         for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
 340                 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
 341                 if (alias.s.base == 0) {
 342                         *size = (1UL << alias.s.m_alias);
 343                         redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
 344                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
 345                         return;
 346                 }
 347         }
 348         BUG();
 349 }
 350
 351 static __init void map_low_mmrs(void)
 352 {
 353         init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
 354         init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
 355 }
 356
 357 enum map_type {map_wb, map_uc};
 358
 359 static __init void map_high(char *id, unsigned long base, int shift,
 360                             int max_pnode, enum map_type map_type)
 361 {
 362         unsigned long bytes, paddr;
 363
 364         paddr = base << shift;
 365         bytes = (1UL << shift) * (max_pnode + 1);
 366         printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
 367                                                 paddr + bytes);
 368         if (map_type == map_uc)
 369                 init_extra_mapping_uc(paddr, bytes);
 370         else
 371                 init_extra_mapping_wb(paddr, bytes);
 372
 373 }
 374 static __init void map_gru_high(int max_pnode)
 375 {
 376         union uvh_rh_gam_gru_overlay_config_mmr_u gru;
 377         int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
 378
 379         gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
 380         if (gru.s.enable)
 381                 map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
 382 }
 383
 384 static __init void map_config_high(int max_pnode)
 385 {
 386         union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
 387         int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;
 388
 389         cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
 390         if (cfg.s.enable)
 391                 map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
 392 }
 393
 394 static __init void map_mmr_high(int max_pnode)
 395 {
 396         union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
 397         int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
 398
 399         mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
 400         if (mmr.s.enable)
 401                 map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
 402 }
 403
 404 static __init void map_mmioh_high(int max_pnode)
 405 {
 406         union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
 407         int shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
 408
 409         mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
 410         if (mmioh.s.enable)
 411                 map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
 412 }
 413
 414 static __init void uv_rtc_init(void)
 415 {
 416         long status;
 417         u64 ticks_per_sec;
 418
 419         status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK,
 420                                         &ticks_per_sec);
 421         if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
 422                 printk(KERN_WARNING
 423                         "unable to determine platform RTC clock frequency, "
 424                         "guessing.\n");
 425                 /* BIOS gives wrong value for clock freq. so guess */
 426                 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
 427         } else
 428                 sn_rtc_cycles_per_second = ticks_per_sec;
 429 }
 430
 431 /*
 432  * percpu heartbeat timer
 433  */
 434 static void uv_heartbeat(unsigned long ignored)
 435 {
 436         struct timer_list *timer = &uv_hub_info->scir.timer;
 437         unsigned char bits = uv_hub_info->scir.state;
 438
 439         /* flip heartbeat bit */
 440         bits ^= SCIR_CPU_HEARTBEAT;
 441
 442         /* is this cpu idle? */
 443         if (idle_cpu(raw_smp_processor_id()))
 444                 bits &= ~SCIR_CPU_ACTIVITY;
 445         else
 446                 bits |= SCIR_CPU_ACTIVITY;
 447
 448         /* update system controller interface reg */
 449         uv_set_scir_bits(bits);
 450
 451         /* enable next timer period */
 452         mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL);
 453 }
 454
 455 static void __cpuinit uv_heartbeat_enable(int cpu)
 456 {
 457         if (!uv_cpu_hub_info(cpu)->scir.enabled) {
 458                 struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
 459
 460                 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
 461                 setup_timer(timer, uv_heartbeat, cpu);
 462                 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
 463                 add_timer_on(timer, cpu);
 464                 uv_cpu_hub_info(cpu)->scir.enabled = 1;
 465         }
 466
 467         /* check boot cpu */
 468         if (!uv_cpu_hub_info(0)->scir.enabled)
 469                 uv_heartbeat_enable(0);
 470 }
 471
 472 #ifdef CONFIG_HOTPLUG_CPU
 473 static void __cpuinit uv_heartbeat_disable(int cpu)
 474 {
 475         if (uv_cpu_hub_info(cpu)->scir.enabled) {
 476                 uv_cpu_hub_info(cpu)->scir.enabled = 0;
 477                 del_timer(&uv_cpu_hub_info(cpu)->scir.timer);
 478         }
 479         uv_set_cpu_scir_bits(cpu, 0xff);
 480 }
 481
 482 /*
 483  * cpu hotplug notifier
 484  */
 485 static __cpuinit int uv_scir_cpu_notify(struct notifier_block *self,
 486                                        unsigned long action, void *hcpu)
 487 {
 488         long cpu = (long)hcpu;
 489
 490         switch (action) {
 491         case CPU_ONLINE:
 492                 uv_heartbeat_enable(cpu);
 493                 break;
 494         case CPU_DOWN_PREPARE:
 495                 uv_heartbeat_disable(cpu);
 496                 break;
 497         default:
 498                 break;
 499         }
 500         return NOTIFY_OK;
 501 }
 502
 503 static __init void uv_scir_register_cpu_notifier(void)
 504 {
 505         hotcpu_notifier(uv_scir_cpu_notify, 0);
 506 }
 507
 508 #else /* !CONFIG_HOTPLUG_CPU */
 509
 510 static __init void uv_scir_register_cpu_notifier(void)
 511 {
 512 }
 513
 514 static __init int uv_init_heartbeat(void)
 515 {
 516         int cpu;
 517
 518         if (is_uv_system())
 519                 for_each_online_cpu(cpu)
 520                         uv_heartbeat_enable(cpu);
 521         return 0;
 522 }
 523
 524 late_initcall(uv_init_heartbeat);
 525
 526 #endif /* !CONFIG_HOTPLUG_CPU */
 527
 528 /*
 529  * Called on each cpu to initialize the per_cpu UV data area.
 530  * FIXME: hotplug not supported yet
 531  */
 532 void __cpuinit uv_cpu_init(void)
 533 {
 534         /* CPU 0 initilization will be done via uv_system_init. */
 535         if (!uv_blade_info)
 536                 return;
 537
 538         uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
 539
 540         if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
 541                 set_x2apic_extra_bits(uv_hub_info->pnode);
 542 }
 543
 544
 545 void __init uv_system_init(void)
 546 {
 547         union uvh_si_addr_map_config_u m_n_config;
 548         union uvh_node_id_u node_id;
 549         unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
 550         int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
 551         int max_pnode = 0;
 552         unsigned long mmr_base, present;
 553
 554         map_low_mmrs();
 555
 556         m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
 557         m_val = m_n_config.s.m_skt;
 558         n_val = m_n_config.s.n_skt;
 559         mmr_base =
 560             uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
 561             ~UV_MMR_ENABLE;
 562         printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
 563
 564         for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
 565                 uv_possible_blades +=
 566                   hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
 567         printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
 568
 569         bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
 570         uv_blade_info = kmalloc(bytes, GFP_KERNEL);
 571
 572         get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
 573
 574         bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
 575         uv_node_to_blade = kmalloc(bytes, GFP_KERNEL);
 576         memset(uv_node_to_blade, 255, bytes);
 577
 578         bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
 579         uv_cpu_to_blade = kmalloc(bytes, GFP_KERNEL);
 580         memset(uv_cpu_to_blade, 255, bytes);
 581
 582         blade = 0;
 583         for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
 584                 present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
 585                 for (j = 0; j < 64; j++) {
 586                         if (!test_bit(j, &present))
 587                                 continue;
 588                         uv_blade_info[blade].pnode = (i * 64 + j);
 589                         uv_blade_info[blade].nr_possible_cpus = 0;
 590                         uv_blade_info[blade].nr_online_cpus = 0;
 591                         blade++;
 592                 }
 593         }
 594
 595         node_id.v = uv_read_local_mmr(UVH_NODE_ID);
 596         gnode_upper = (((unsigned long)node_id.s.node_id) &
 597                        ~((1 << n_val) - 1)) << m_val;
 598
 599         uv_bios_init();
 600         uv_bios_get_sn_info(0, &uv_type, &sn_partition_id,
 601                             &sn_coherency_id, &sn_region_size);
 602         uv_rtc_init();
 603
 604         for_each_present_cpu(cpu) {
 605                 nid = cpu_to_node(cpu);
 606                 pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu));
 607                 blade = boot_pnode_to_blade(pnode);
 608                 lcpu = uv_blade_info[blade].nr_possible_cpus;
 609                 uv_blade_info[blade].nr_possible_cpus++;
 610
 611                 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
 612                 uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
 613                 uv_cpu_hub_info(cpu)->m_val = m_val;
 614                 uv_cpu_hub_info(cpu)->n_val = m_val;
 615                 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
 616                 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 617                 uv_cpu_hub_info(cpu)->pnode = pnode;
 618                 uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) - 1;
 619                 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
 620                 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
 621                 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
 622                 uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
 623                 uv_cpu_hub_info(cpu)->scir.offset = SCIR_LOCAL_MMR_BASE + lcpu;
 624                 uv_node_to_blade[nid] = blade;
 625                 uv_cpu_to_blade[cpu] = blade;
 626                 max_pnode = max(pnode, max_pnode);
 627
 628                 printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, "
 629                         "lcpu %d, blade %d\n",
 630                         cpu, per_cpu(x86_cpu_to_apicid, cpu), pnode, nid,
 631                         lcpu, blade);
 632         }
 633
 634         map_gru_high(max_pnode);
 635         map_mmr_high(max_pnode);
 636         map_config_high(max_pnode);
 637         map_mmioh_high(max_pnode);
 638
 639         uv_cpu_init();
 640         uv_scir_register_cpu_notifier();
 641         proc_mkdir("sgi_uv", NULL);
 642 }