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 val, apicid;
 122         int pnode;
 123
 124         apicid = per_cpu(x86_cpu_to_apicid, cpu);
 125         pnode = uv_apicid_to_pnode(apicid);
 126
 127         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 128               (apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 129               (vector << UVH_IPI_INT_VECTOR_SHFT);
 130
 131         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 132 }
 133
 134 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
 135 {
 136         unsigned int cpu;
 137
 138         for_each_cpu(cpu, mask)
 139                 uv_send_IPI_one(cpu, vector);
 140 }
 141
 142 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
 143 {
 144         unsigned int this_cpu = smp_processor_id();
 145         unsigned int cpu;
 146
 147         for_each_cpu(cpu, mask) {
 148                 if (cpu != this_cpu)
 149                         uv_send_IPI_one(cpu, vector);
 150         }
 151 }
 152
 153 static void uv_send_IPI_allbutself(int vector)
 154 {
 155         unsigned int this_cpu = smp_processor_id();
 156         unsigned int cpu;
 157
 158         for_each_online_cpu(cpu) {
 159                 if (cpu != this_cpu)
 160                         uv_send_IPI_one(cpu, vector);
 161         }
 162 }
 163
 164 static void uv_send_IPI_all(int vector)
 165 {
 166         uv_send_IPI_mask(cpu_online_mask, vector);
 167 }
 168
 169 static int uv_apic_id_registered(void)
 170 {
 171         return 1;
 172 }
 173
 174 static void uv_init_apic_ldr(void)
 175 {
 176 }
 177
 178 static unsigned int uv_cpu_mask_to_apicid(const struct cpumask *cpumask)
 179 {
 180         /*
 181          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 182          * May as well be the first.
 183          */
 184         int cpu = cpumask_first(cpumask);
 185
 186         if ((unsigned)cpu < nr_cpu_ids)
 187                 return per_cpu(x86_cpu_to_apicid, cpu);
 188         else
 189                 return BAD_APICID;
 190 }
 191
 192 static unsigned int
 193 uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
 194                           const struct cpumask *andmask)
 195 {
 196         int cpu;
 197
 198         /*
 199          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 200          * May as well be the first.
 201          */
 202         for_each_cpu_and(cpu, cpumask, andmask) {
 203                 if (cpumask_test_cpu(cpu, cpu_online_mask))
 204                         break;
 205         }
 206         if (cpu < nr_cpu_ids)
 207                 return per_cpu(x86_cpu_to_apicid, cpu);
 208
 209         return BAD_APICID;
 210 }
 211
 212 static unsigned int x2apic_get_apic_id(unsigned long x)
 213 {
 214         unsigned int id;
 215
 216         WARN_ON(preemptible() && num_online_cpus() > 1);
 217         id = x | __get_cpu_var(x2apic_extra_bits);
 218
 219         return id;
 220 }
 221
 222 static unsigned long set_apic_id(unsigned int id)
 223 {
 224         unsigned long x;
 225
 226         /* maskout x2apic_extra_bits ? */
 227         x = id;
 228         return x;
 229 }
 230
 231 static unsigned int uv_read_apic_id(void)
 232 {
 233
 234         return x2apic_get_apic_id(apic_read(APIC_ID));
 235 }
 236
 237 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
 238 {
 239         return uv_read_apic_id() >> index_msb;
 240 }
 241
 242 static void uv_send_IPI_self(int vector)
 243 {
 244         apic_write(APIC_SELF_IPI, vector);
 245 }
 246
 247 struct apic apic_x2apic_uv_x = {
 248
 249         .name                           = "UV large system",
 250         .probe                          = NULL,
 251         .acpi_madt_oem_check            = uv_acpi_madt_oem_check,
 252         .apic_id_registered             = uv_apic_id_registered,
 253
 254         .irq_delivery_mode              = dest_Fixed,
 255         .irq_dest_mode                  = 1, /* logical */
 256
 257         .target_cpus                    = uv_target_cpus,
 258         .disable_esr                    = 0,
 259         .dest_logical                   = APIC_DEST_LOGICAL,
 260         .check_apicid_used              = NULL,
 261         .check_apicid_present           = NULL,
 262
 263         .vector_allocation_domain       = uv_vector_allocation_domain,
 264         .init_apic_ldr                  = uv_init_apic_ldr,
 265
 266         .ioapic_phys_id_map             = NULL,
 267         .setup_apic_routing             = NULL,
 268         .multi_timer_check              = NULL,
 269         .apicid_to_node                 = NULL,
 270         .cpu_to_logical_apicid          = NULL,
 271         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 272         .apicid_to_cpu_present          = NULL,
 273         .setup_portio_remap             = NULL,
 274         .check_phys_apicid_present      = default_check_phys_apicid_present,
 275         .enable_apic_mode               = NULL,
 276         .phys_pkg_id                    = uv_phys_pkg_id,
 277         .mps_oem_check                  = NULL,
 278
 279         .get_apic_id                    = x2apic_get_apic_id,
 280         .set_apic_id                    = set_apic_id,
 281         .apic_id_mask                   = 0xFFFFFFFFu,
 282
 283         .cpu_mask_to_apicid             = uv_cpu_mask_to_apicid,
 284         .cpu_mask_to_apicid_and         = uv_cpu_mask_to_apicid_and,
 285
 286         .send_IPI_mask                  = uv_send_IPI_mask,
 287         .send_IPI_mask_allbutself       = uv_send_IPI_mask_allbutself,
 288         .send_IPI_allbutself            = uv_send_IPI_allbutself,
 289         .send_IPI_all                   = uv_send_IPI_all,
 290         .send_IPI_self                  = uv_send_IPI_self,
 291
 292         .wakeup_secondary_cpu           = uv_wakeup_secondary,
 293         .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
 294         .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
 295         .wait_for_init_deassert         = NULL,
 296         .smp_callin_clear_local_apic    = NULL,
 297         .inquire_remote_apic            = NULL,
 298
 299         .read                           = native_apic_msr_read,
 300         .write                          = native_apic_msr_write,
 301         .icr_read                       = native_x2apic_icr_read,
 302         .icr_write                      = native_x2apic_icr_write,
 303         .wait_icr_idle                  = native_x2apic_wait_icr_idle,
 304         .safe_wait_icr_idle             = native_safe_x2apic_wait_icr_idle,
 305 };
 306
 307 static __cpuinit void set_x2apic_extra_bits(int pnode)
 308 {
 309         __get_cpu_var(x2apic_extra_bits) = (pnode << 6);
 310 }
 311
 312 /*
 313  * Called on boot cpu.
 314  */
 315 static __init int boot_pnode_to_blade(int pnode)
 316 {
 317         int blade;
 318
 319         for (blade = 0; blade < uv_num_possible_blades(); blade++)
 320                 if (pnode == uv_blade_info[blade].pnode)
 321                         return blade;
 322         BUG();
 323 }
 324
 325 struct redir_addr {
 326         unsigned long redirect;
 327         unsigned long alias;
 328 };
 329
 330 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
 331
 332 static __initdata struct redir_addr redir_addrs[] = {
 333         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
 334         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
 335         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
 336 };
 337
 338 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
 339 {
 340         union uvh_si_alias0_overlay_config_u alias;
 341         union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
 342         int i;
 343
 344         for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
 345                 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
 346                 if (alias.s.base == 0) {
 347                         *size = (1UL << alias.s.m_alias);
 348                         redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
 349                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
 350                         return;
 351                 }
 352         }
 353         BUG();
 354 }
 355
 356 static __init void map_low_mmrs(void)
 357 {
 358         init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
 359         init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
 360 }
 361
 362 enum map_type {map_wb, map_uc};
 363
 364 static __init void map_high(char *id, unsigned long base, int shift,
 365                             int max_pnode, enum map_type map_type)
 366 {
 367         unsigned long bytes, paddr;
 368
 369         paddr = base << shift;
 370         bytes = (1UL << shift) * (max_pnode + 1);
 371         printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
 372                                                 paddr + bytes);
 373         if (map_type == map_uc)
 374                 init_extra_mapping_uc(paddr, bytes);
 375         else
 376                 init_extra_mapping_wb(paddr, bytes);
 377
 378 }
 379 static __init void map_gru_high(int max_pnode)
 380 {
 381         union uvh_rh_gam_gru_overlay_config_mmr_u gru;
 382         int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
 383
 384         gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
 385         if (gru.s.enable)
 386                 map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
 387 }
 388
 389 static __init void map_config_high(int max_pnode)
 390 {
 391         union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
 392         int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;
 393
 394         cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
 395         if (cfg.s.enable)
 396                 map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
 397 }
 398
 399 static __init void map_mmr_high(int max_pnode)
 400 {
 401         union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
 402         int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
 403
 404         mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
 405         if (mmr.s.enable)
 406                 map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
 407 }
 408
 409 static __init void map_mmioh_high(int max_pnode)
 410 {
 411         union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
 412         int shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
 413
 414         mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
 415         if (mmioh.s.enable)
 416                 map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
 417 }
 418
 419 static __init void uv_rtc_init(void)
 420 {
 421         long status;
 422         u64 ticks_per_sec;
 423
 424         status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK,
 425                                         &ticks_per_sec);
 426         if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
 427                 printk(KERN_WARNING
 428                         "unable to determine platform RTC clock frequency, "
 429                         "guessing.\n");
 430                 /* BIOS gives wrong value for clock freq. so guess */
 431                 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
 432         } else
 433                 sn_rtc_cycles_per_second = ticks_per_sec;
 434 }
 435
 436 /*
 437  * percpu heartbeat timer
 438  */
 439 static void uv_heartbeat(unsigned long ignored)
 440 {
 441         struct timer_list *timer = &uv_hub_info->scir.timer;
 442         unsigned char bits = uv_hub_info->scir.state;
 443
 444         /* flip heartbeat bit */
 445         bits ^= SCIR_CPU_HEARTBEAT;
 446
 447         /* is this cpu idle? */
 448         if (idle_cpu(raw_smp_processor_id()))
 449                 bits &= ~SCIR_CPU_ACTIVITY;
 450         else
 451                 bits |= SCIR_CPU_ACTIVITY;
 452
 453         /* update system controller interface reg */
 454         uv_set_scir_bits(bits);
 455
 456         /* enable next timer period */
 457         mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL);
 458 }
 459
 460 static void __cpuinit uv_heartbeat_enable(int cpu)
 461 {
 462         if (!uv_cpu_hub_info(cpu)->scir.enabled) {
 463                 struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
 464
 465                 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
 466                 setup_timer(timer, uv_heartbeat, cpu);
 467                 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
 468                 add_timer_on(timer, cpu);
 469                 uv_cpu_hub_info(cpu)->scir.enabled = 1;
 470         }
 471
 472         /* check boot cpu */
 473         if (!uv_cpu_hub_info(0)->scir.enabled)
 474                 uv_heartbeat_enable(0);
 475 }
 476
 477 #ifdef CONFIG_HOTPLUG_CPU
 478 static void __cpuinit uv_heartbeat_disable(int cpu)
 479 {
 480         if (uv_cpu_hub_info(cpu)->scir.enabled) {
 481                 uv_cpu_hub_info(cpu)->scir.enabled = 0;
 482                 del_timer(&uv_cpu_hub_info(cpu)->scir.timer);
 483         }
 484         uv_set_cpu_scir_bits(cpu, 0xff);
 485 }
 486
 487 /*
 488  * cpu hotplug notifier
 489  */
 490 static __cpuinit int uv_scir_cpu_notify(struct notifier_block *self,
 491                                        unsigned long action, void *hcpu)
 492 {
 493         long cpu = (long)hcpu;
 494
 495         switch (action) {
 496         case CPU_ONLINE:
 497                 uv_heartbeat_enable(cpu);
 498                 break;
 499         case CPU_DOWN_PREPARE:
 500                 uv_heartbeat_disable(cpu);
 501                 break;
 502         default:
 503                 break;
 504         }
 505         return NOTIFY_OK;
 506 }
 507
 508 static __init void uv_scir_register_cpu_notifier(void)
 509 {
 510         hotcpu_notifier(uv_scir_cpu_notify, 0);
 511 }
 512
 513 #else /* !CONFIG_HOTPLUG_CPU */
 514
 515 static __init void uv_scir_register_cpu_notifier(void)
 516 {
 517 }
 518
 519 static __init int uv_init_heartbeat(void)
 520 {
 521         int cpu;
 522
 523         if (is_uv_system())
 524                 for_each_online_cpu(cpu)
 525                         uv_heartbeat_enable(cpu);
 526         return 0;
 527 }
 528
 529 late_initcall(uv_init_heartbeat);
 530
 531 #endif /* !CONFIG_HOTPLUG_CPU */
 532
 533 /*
 534  * Called on each cpu to initialize the per_cpu UV data area.
 535  * FIXME: hotplug not supported yet
 536  */
 537 void __cpuinit uv_cpu_init(void)
 538 {
 539         /* CPU 0 initilization will be done via uv_system_init. */
 540         if (!uv_blade_info)
 541                 return;
 542
 543         uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
 544
 545         if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
 546                 set_x2apic_extra_bits(uv_hub_info->pnode);
 547 }
 548
 549
 550 void __init uv_system_init(void)
 551 {
 552         union uvh_si_addr_map_config_u m_n_config;
 553         union uvh_node_id_u node_id;
 554         unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
 555         int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
 556         int max_pnode = 0;
 557         unsigned long mmr_base, present;
 558
 559         map_low_mmrs();
 560
 561         m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
 562         m_val = m_n_config.s.m_skt;
 563         n_val = m_n_config.s.n_skt;
 564         mmr_base =
 565             uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
 566             ~UV_MMR_ENABLE;
 567         printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
 568
 569         for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
 570                 uv_possible_blades +=
 571                   hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
 572         printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
 573
 574         bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
 575         uv_blade_info = kmalloc(bytes, GFP_KERNEL);
 576
 577         get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
 578
 579         bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
 580         uv_node_to_blade = kmalloc(bytes, GFP_KERNEL);
 581         memset(uv_node_to_blade, 255, bytes);
 582
 583         bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
 584         uv_cpu_to_blade = kmalloc(bytes, GFP_KERNEL);
 585         memset(uv_cpu_to_blade, 255, bytes);
 586
 587         blade = 0;
 588         for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
 589                 present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
 590                 for (j = 0; j < 64; j++) {
 591                         if (!test_bit(j, &present))
 592                                 continue;
 593                         uv_blade_info[blade].pnode = (i * 64 + j);
 594                         uv_blade_info[blade].nr_possible_cpus = 0;
 595                         uv_blade_info[blade].nr_online_cpus = 0;
 596                         blade++;
 597                 }
 598         }
 599
 600         node_id.v = uv_read_local_mmr(UVH_NODE_ID);
 601         gnode_upper = (((unsigned long)node_id.s.node_id) &
 602                        ~((1 << n_val) - 1)) << m_val;
 603
 604         uv_bios_init();
 605         uv_bios_get_sn_info(0, &uv_type, &sn_partition_id,
 606                             &sn_coherency_id, &sn_region_size);
 607         uv_rtc_init();
 608
 609         for_each_present_cpu(cpu) {
 610                 nid = cpu_to_node(cpu);
 611                 pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu));
 612                 blade = boot_pnode_to_blade(pnode);
 613                 lcpu = uv_blade_info[blade].nr_possible_cpus;
 614                 uv_blade_info[blade].nr_possible_cpus++;
 615
 616                 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
 617                 uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
 618                 uv_cpu_hub_info(cpu)->m_val = m_val;
 619                 uv_cpu_hub_info(cpu)->n_val = m_val;
 620                 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
 621                 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 622                 uv_cpu_hub_info(cpu)->pnode = pnode;
 623                 uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) - 1;
 624                 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
 625                 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
 626                 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
 627                 uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
 628                 uv_cpu_hub_info(cpu)->scir.offset = SCIR_LOCAL_MMR_BASE + lcpu;
 629                 uv_node_to_blade[nid] = blade;
 630                 uv_cpu_to_blade[cpu] = blade;
 631                 max_pnode = max(pnode, max_pnode);
 632
 633                 printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, "
 634                         "lcpu %d, blade %d\n",
 635                         cpu, per_cpu(x86_cpu_to_apicid, cpu), pnode, nid,
 636                         lcpu, blade);
 637         }
 638
 639         map_gru_high(max_pnode);
 640         map_mmr_high(max_pnode);
 641         map_config_high(max_pnode);
 642         map_mmioh_high(max_pnode);
 643
 644         uv_cpu_init();
 645         uv_scir_register_cpu_notifier();
 646         proc_mkdir("sgi_uv", NULL);
 647 }