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 #include <linux/io.h>
  23
  24 #include <asm/uv/uv_mmrs.h>
  25 #include <asm/uv/uv_hub.h>
  26 #include <asm/current.h>
  27 #include <asm/pgtable.h>
  28 #include <asm/uv/bios.h>
  29 #include <asm/uv/uv.h>
  30 #include <asm/apic.h>
  31 #include <asm/ipi.h>
  32 #include <asm/smp.h>
  33
  34 DEFINE_PER_CPU(int, x2apic_extra_bits);
  35
  36 static enum uv_system_type uv_system_type;
  37
  38 static int early_get_nodeid(void)
  39 {
  40         union uvh_node_id_u node_id;
  41         unsigned long *mmr;
  42
  43         mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_NODE_ID, sizeof(*mmr));
  44         node_id.v = *mmr;
  45         early_iounmap(mmr, sizeof(*mmr));
  46         return node_id.s.node_id;
  47 }
  48
  49 static int uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  50 {
  51         if (!strcmp(oem_id, "SGI")) {
  52                 if (!strcmp(oem_table_id, "UVL"))
  53                         uv_system_type = UV_LEGACY_APIC;
  54                 else if (!strcmp(oem_table_id, "UVX"))
  55                         uv_system_type = UV_X2APIC;
  56                 else if (!strcmp(oem_table_id, "UVH")) {
  57                         __get_cpu_var(x2apic_extra_bits) =
  58                                 early_get_nodeid() << (UV_APIC_PNODE_SHIFT - 1);
  59                         uv_system_type = UV_NON_UNIQUE_APIC;
  60                         return 1;
  61                 }
  62         }
  63         return 0;
  64 }
  65
  66 enum uv_system_type get_uv_system_type(void)
  67 {
  68         return uv_system_type;
  69 }
  70
  71 int is_uv_system(void)
  72 {
  73         return uv_system_type != UV_NONE;
  74 }
  75 EXPORT_SYMBOL_GPL(is_uv_system);
  76
  77 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
  78 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
  79
  80 struct uv_blade_info *uv_blade_info;
  81 EXPORT_SYMBOL_GPL(uv_blade_info);
  82
  83 short *uv_node_to_blade;
  84 EXPORT_SYMBOL_GPL(uv_node_to_blade);
  85
  86 short *uv_cpu_to_blade;
  87 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);
  88
  89 short uv_possible_blades;
  90 EXPORT_SYMBOL_GPL(uv_possible_blades);
  91
  92 unsigned long sn_rtc_cycles_per_second;
  93 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
  94
  95 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */
  96
  97 static const struct cpumask *uv_target_cpus(void)
  98 {
  99         return cpumask_of(0);
 100 }
 101
 102 static void uv_vector_allocation_domain(int cpu, struct cpumask *retmask)
 103 {
 104         cpumask_clear(retmask);
 105         cpumask_set_cpu(cpu, retmask);
 106 }
 107
 108 static int __cpuinit uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
 109 {
 110 #ifdef CONFIG_SMP
 111         unsigned long val;
 112         int pnode;
 113
 114         pnode = uv_apicid_to_pnode(phys_apicid);
 115         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 116             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 117             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 118             APIC_DM_INIT;
 119         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 120         mdelay(10);
 121
 122         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 123             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 124             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 125             APIC_DM_STARTUP;
 126         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 127
 128         atomic_set(&init_deasserted, 1);
 129 #endif
 130         return 0;
 131 }
 132
 133 static void uv_send_IPI_one(int cpu, int vector)
 134 {
 135         unsigned long apicid;
 136         int pnode;
 137
 138         apicid = per_cpu(x86_cpu_to_apicid, cpu);
 139         pnode = uv_apicid_to_pnode(apicid);
 140         uv_hub_send_ipi(pnode, apicid, vector);
 141 }
 142
 143 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
 144 {
 145         unsigned int cpu;
 146
 147         for_each_cpu(cpu, mask)
 148                 uv_send_IPI_one(cpu, vector);
 149 }
 150
 151 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
 152 {
 153         unsigned int this_cpu = smp_processor_id();
 154         unsigned int cpu;
 155
 156         for_each_cpu(cpu, mask) {
 157                 if (cpu != this_cpu)
 158                         uv_send_IPI_one(cpu, vector);
 159         }
 160 }
 161
 162 static void uv_send_IPI_allbutself(int vector)
 163 {
 164         unsigned int this_cpu = smp_processor_id();
 165         unsigned int cpu;
 166
 167         for_each_online_cpu(cpu) {
 168                 if (cpu != this_cpu)
 169                         uv_send_IPI_one(cpu, vector);
 170         }
 171 }
 172
 173 static void uv_send_IPI_all(int vector)
 174 {
 175         uv_send_IPI_mask(cpu_online_mask, vector);
 176 }
 177
 178 static int uv_apic_id_registered(void)
 179 {
 180         return 1;
 181 }
 182
 183 static void uv_init_apic_ldr(void)
 184 {
 185 }
 186
 187 static unsigned int uv_cpu_mask_to_apicid(const struct cpumask *cpumask)
 188 {
 189         /*
 190          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 191          * May as well be the first.
 192          */
 193         int cpu = cpumask_first(cpumask);
 194
 195         if ((unsigned)cpu < nr_cpu_ids)
 196                 return per_cpu(x86_cpu_to_apicid, cpu);
 197         else
 198                 return BAD_APICID;
 199 }
 200
 201 static unsigned int
 202 uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
 203                           const struct cpumask *andmask)
 204 {
 205         int cpu;
 206
 207         /*
 208          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 209          * May as well be the first.
 210          */
 211         for_each_cpu_and(cpu, cpumask, andmask) {
 212                 if (cpumask_test_cpu(cpu, cpu_online_mask))
 213                         break;
 214         }
 215         if (cpu < nr_cpu_ids)
 216                 return per_cpu(x86_cpu_to_apicid, cpu);
 217
 218         return BAD_APICID;
 219 }
 220
 221 static unsigned int x2apic_get_apic_id(unsigned long x)
 222 {
 223         unsigned int id;
 224
 225         WARN_ON(preemptible() && num_online_cpus() > 1);
 226         id = x | __get_cpu_var(x2apic_extra_bits);
 227
 228         return id;
 229 }
 230
 231 static unsigned long set_apic_id(unsigned int id)
 232 {
 233         unsigned long x;
 234
 235         /* maskout x2apic_extra_bits ? */
 236         x = id;
 237         return x;
 238 }
 239
 240 static unsigned int uv_read_apic_id(void)
 241 {
 242
 243         return x2apic_get_apic_id(apic_read(APIC_ID));
 244 }
 245
 246 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
 247 {
 248         return uv_read_apic_id() >> index_msb;
 249 }
 250
 251 static void uv_send_IPI_self(int vector)
 252 {
 253         apic_write(APIC_SELF_IPI, vector);
 254 }
 255
 256 struct apic apic_x2apic_uv_x = {
 257
 258         .name                           = "UV large system",
 259         .probe                          = NULL,
 260         .acpi_madt_oem_check            = uv_acpi_madt_oem_check,
 261         .apic_id_registered             = uv_apic_id_registered,
 262
 263         .irq_delivery_mode              = dest_Fixed,
 264         .irq_dest_mode                  = 1, /* logical */
 265
 266         .target_cpus                    = uv_target_cpus,
 267         .disable_esr                    = 0,
 268         .dest_logical                   = APIC_DEST_LOGICAL,
 269         .check_apicid_used              = NULL,
 270         .check_apicid_present           = NULL,
 271
 272         .vector_allocation_domain       = uv_vector_allocation_domain,
 273         .init_apic_ldr                  = uv_init_apic_ldr,
 274
 275         .ioapic_phys_id_map             = NULL,
 276         .setup_apic_routing             = NULL,
 277         .multi_timer_check              = NULL,
 278         .apicid_to_node                 = NULL,
 279         .cpu_to_logical_apicid          = NULL,
 280         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 281         .apicid_to_cpu_present          = NULL,
 282         .setup_portio_remap             = NULL,
 283         .check_phys_apicid_present      = default_check_phys_apicid_present,
 284         .enable_apic_mode               = NULL,
 285         .phys_pkg_id                    = uv_phys_pkg_id,
 286         .mps_oem_check                  = NULL,
 287
 288         .get_apic_id                    = x2apic_get_apic_id,
 289         .set_apic_id                    = set_apic_id,
 290         .apic_id_mask                   = 0xFFFFFFFFu,
 291
 292         .cpu_mask_to_apicid             = uv_cpu_mask_to_apicid,
 293         .cpu_mask_to_apicid_and         = uv_cpu_mask_to_apicid_and,
 294
 295         .send_IPI_mask                  = uv_send_IPI_mask,
 296         .send_IPI_mask_allbutself       = uv_send_IPI_mask_allbutself,
 297         .send_IPI_allbutself            = uv_send_IPI_allbutself,
 298         .send_IPI_all                   = uv_send_IPI_all,
 299         .send_IPI_self                  = uv_send_IPI_self,
 300
 301         .wakeup_secondary_cpu           = uv_wakeup_secondary,
 302         .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
 303         .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
 304         .wait_for_init_deassert         = NULL,
 305         .smp_callin_clear_local_apic    = NULL,
 306         .inquire_remote_apic            = NULL,
 307
 308         .read                           = native_apic_msr_read,
 309         .write                          = native_apic_msr_write,
 310         .icr_read                       = native_x2apic_icr_read,
 311         .icr_write                      = native_x2apic_icr_write,
 312         .wait_icr_idle                  = native_x2apic_wait_icr_idle,
 313         .safe_wait_icr_idle             = native_safe_x2apic_wait_icr_idle,
 314 };
 315
 316 static __cpuinit void set_x2apic_extra_bits(int pnode)
 317 {
 318         __get_cpu_var(x2apic_extra_bits) = (pnode << 6);
 319 }
 320
 321 /*
 322  * Called on boot cpu.
 323  */
 324 static __init int boot_pnode_to_blade(int pnode)
 325 {
 326         int blade;
 327
 328         for (blade = 0; blade < uv_num_possible_blades(); blade++)
 329                 if (pnode == uv_blade_info[blade].pnode)
 330                         return blade;
 331         BUG();
 332 }
 333
 334 struct redir_addr {
 335         unsigned long redirect;
 336         unsigned long alias;
 337 };
 338
 339 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
 340
 341 static __initdata struct redir_addr redir_addrs[] = {
 342         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
 343         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
 344         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
 345 };
 346
 347 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
 348 {
 349         union uvh_si_alias0_overlay_config_u alias;
 350         union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
 351         int i;
 352
 353         for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
 354                 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
 355                 if (alias.s.base == 0) {
 356                         *size = (1UL << alias.s.m_alias);
 357                         redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
 358                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
 359                         return;
 360                 }
 361         }
 362         BUG();
 363 }
 364
 365 static __init void map_low_mmrs(void)
 366 {
 367         init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
 368         init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
 369 }
 370
 371 enum map_type {map_wb, map_uc};
 372
 373 static __init void map_high(char *id, unsigned long base, int shift,
 374                             int max_pnode, enum map_type map_type)
 375 {
 376         unsigned long bytes, paddr;
 377
 378         paddr = base << shift;
 379         bytes = (1UL << shift) * (max_pnode + 1);
 380         printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
 381                                                 paddr + bytes);
 382         if (map_type == map_uc)
 383                 init_extra_mapping_uc(paddr, bytes);
 384         else
 385                 init_extra_mapping_wb(paddr, bytes);
 386
 387 }
 388 static __init void map_gru_high(int max_pnode)
 389 {
 390         union uvh_rh_gam_gru_overlay_config_mmr_u gru;
 391         int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
 392
 393         gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
 394         if (gru.s.enable)
 395                 map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
 396 }
 397
 398 static __init void map_config_high(int max_pnode)
 399 {
 400         union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
 401         int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;
 402
 403         cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
 404         if (cfg.s.enable)
 405                 map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
 406 }
 407
 408 static __init void map_mmr_high(int max_pnode)
 409 {
 410         union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
 411         int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
 412
 413         mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
 414         if (mmr.s.enable)
 415                 map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
 416 }
 417
 418 static __init void map_mmioh_high(int max_pnode)
 419 {
 420         union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
 421         int shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
 422
 423         mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
 424         if (mmioh.s.enable)
 425                 map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
 426 }
 427
 428 static __init void uv_rtc_init(void)
 429 {
 430         long status;
 431         u64 ticks_per_sec;
 432
 433         status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK,
 434                                         &ticks_per_sec);
 435         if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
 436                 printk(KERN_WARNING
 437                         "unable to determine platform RTC clock frequency, "
 438                         "guessing.\n");
 439                 /* BIOS gives wrong value for clock freq. so guess */
 440                 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
 441         } else
 442                 sn_rtc_cycles_per_second = ticks_per_sec;
 443 }
 444
 445 /*
 446  * percpu heartbeat timer
 447  */
 448 static void uv_heartbeat(unsigned long ignored)
 449 {
 450         struct timer_list *timer = &uv_hub_info->scir.timer;
 451         unsigned char bits = uv_hub_info->scir.state;
 452
 453         /* flip heartbeat bit */
 454         bits ^= SCIR_CPU_HEARTBEAT;
 455
 456         /* is this cpu idle? */
 457         if (idle_cpu(raw_smp_processor_id()))
 458                 bits &= ~SCIR_CPU_ACTIVITY;
 459         else
 460                 bits |= SCIR_CPU_ACTIVITY;
 461
 462         /* update system controller interface reg */
 463         uv_set_scir_bits(bits);
 464
 465         /* enable next timer period */
 466         mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL);
 467 }
 468
 469 static void __cpuinit uv_heartbeat_enable(int cpu)
 470 {
 471         if (!uv_cpu_hub_info(cpu)->scir.enabled) {
 472                 struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
 473
 474                 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
 475                 setup_timer(timer, uv_heartbeat, cpu);
 476                 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
 477                 add_timer_on(timer, cpu);
 478                 uv_cpu_hub_info(cpu)->scir.enabled = 1;
 479         }
 480
 481         /* check boot cpu */
 482         if (!uv_cpu_hub_info(0)->scir.enabled)
 483                 uv_heartbeat_enable(0);
 484 }
 485
 486 #ifdef CONFIG_HOTPLUG_CPU
 487 static void __cpuinit uv_heartbeat_disable(int cpu)
 488 {
 489         if (uv_cpu_hub_info(cpu)->scir.enabled) {
 490                 uv_cpu_hub_info(cpu)->scir.enabled = 0;
 491                 del_timer(&uv_cpu_hub_info(cpu)->scir.timer);
 492         }
 493         uv_set_cpu_scir_bits(cpu, 0xff);
 494 }
 495
 496 /*
 497  * cpu hotplug notifier
 498  */
 499 static __cpuinit int uv_scir_cpu_notify(struct notifier_block *self,
 500                                        unsigned long action, void *hcpu)
 501 {
 502         long cpu = (long)hcpu;
 503
 504         switch (action) {
 505         case CPU_ONLINE:
 506                 uv_heartbeat_enable(cpu);
 507                 break;
 508         case CPU_DOWN_PREPARE:
 509                 uv_heartbeat_disable(cpu);
 510                 break;
 511         default:
 512                 break;
 513         }
 514         return NOTIFY_OK;
 515 }
 516
 517 static __init void uv_scir_register_cpu_notifier(void)
 518 {
 519         hotcpu_notifier(uv_scir_cpu_notify, 0);
 520 }
 521
 522 #else /* !CONFIG_HOTPLUG_CPU */
 523
 524 static __init void uv_scir_register_cpu_notifier(void)
 525 {
 526 }
 527
 528 static __init int uv_init_heartbeat(void)
 529 {
 530         int cpu;
 531
 532         if (is_uv_system())
 533                 for_each_online_cpu(cpu)
 534                         uv_heartbeat_enable(cpu);
 535         return 0;
 536 }
 537
 538 late_initcall(uv_init_heartbeat);
 539
 540 #endif /* !CONFIG_HOTPLUG_CPU */
 541
 542 /*
 543  * Called on each cpu to initialize the per_cpu UV data area.
 544  * FIXME: hotplug not supported yet
 545  */
 546 void __cpuinit uv_cpu_init(void)
 547 {
 548         /* CPU 0 initilization will be done via uv_system_init. */
 549         if (!uv_blade_info)
 550                 return;
 551
 552         uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
 553
 554         if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
 555                 set_x2apic_extra_bits(uv_hub_info->pnode);
 556 }
 557
 558
 559 void __init uv_system_init(void)
 560 {
 561         union uvh_si_addr_map_config_u m_n_config;
 562         union uvh_node_id_u node_id;
 563         unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
 564         int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
 565         int max_pnode = 0;
 566         unsigned long mmr_base, present, paddr;
 567         unsigned short pnode_mask;
 568
 569         map_low_mmrs();
 570
 571         m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
 572         m_val = m_n_config.s.m_skt;
 573         n_val = m_n_config.s.n_skt;
 574         mmr_base =
 575             uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
 576             ~UV_MMR_ENABLE;
 577         printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
 578
 579         for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
 580                 uv_possible_blades +=
 581                   hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
 582         printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
 583
 584         bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
 585         uv_blade_info = kmalloc(bytes, GFP_KERNEL);
 586         BUG_ON(!uv_blade_info);
 587
 588         get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
 589
 590         bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
 591         uv_node_to_blade = kmalloc(bytes, GFP_KERNEL);
 592         BUG_ON(!uv_node_to_blade);
 593         memset(uv_node_to_blade, 255, bytes);
 594
 595         bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
 596         uv_cpu_to_blade = kmalloc(bytes, GFP_KERNEL);
 597         BUG_ON(!uv_cpu_to_blade);
 598         memset(uv_cpu_to_blade, 255, bytes);
 599
 600         blade = 0;
 601         for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
 602                 present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
 603                 for (j = 0; j < 64; j++) {
 604                         if (!test_bit(j, &present))
 605                                 continue;
 606                         uv_blade_info[blade].pnode = (i * 64 + j);
 607                         uv_blade_info[blade].nr_possible_cpus = 0;
 608                         uv_blade_info[blade].nr_online_cpus = 0;
 609                         blade++;
 610                 }
 611         }
 612
 613         pnode_mask = (1 << n_val) - 1;
 614         node_id.v = uv_read_local_mmr(UVH_NODE_ID);
 615         gnode_upper = (((unsigned long)node_id.s.node_id) &
 616                        ~((1 << n_val) - 1)) << m_val;
 617
 618         uv_bios_init();
 619         uv_bios_get_sn_info(0, &uv_type, &sn_partition_id,
 620                             &sn_coherency_id, &sn_region_size);
 621         uv_rtc_init();
 622
 623         for_each_present_cpu(cpu) {
 624                 nid = cpu_to_node(cpu);
 625                 pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu));
 626                 blade = boot_pnode_to_blade(pnode);
 627                 lcpu = uv_blade_info[blade].nr_possible_cpus;
 628                 uv_blade_info[blade].nr_possible_cpus++;
 629
 630                 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
 631                 uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
 632                 uv_cpu_hub_info(cpu)->m_val = m_val;
 633                 uv_cpu_hub_info(cpu)->n_val = m_val;
 634                 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
 635                 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 636                 uv_cpu_hub_info(cpu)->pnode = pnode;
 637                 uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
 638                 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
 639                 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
 640                 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
 641                 uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
 642                 uv_cpu_hub_info(cpu)->scir.offset = SCIR_LOCAL_MMR_BASE + lcpu;
 643                 uv_node_to_blade[nid] = blade;
 644                 uv_cpu_to_blade[cpu] = blade;
 645                 max_pnode = max(pnode, max_pnode);
 646
 647                 printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, "
 648                         "lcpu %d, blade %d\n",
 649                         cpu, per_cpu(x86_cpu_to_apicid, cpu), pnode, nid,
 650                         lcpu, blade);
 651         }
 652
 653         /* Add blade/pnode info for nodes without cpus */
 654         for_each_online_node(nid) {
 655                 if (uv_node_to_blade[nid] >= 0)
 656                         continue;
 657                 paddr = node_start_pfn(nid) << PAGE_SHIFT;
 658                 paddr = uv_soc_phys_ram_to_gpa(paddr);
 659                 pnode = (paddr >> m_val) & pnode_mask;
 660                 blade = boot_pnode_to_blade(pnode);
 661                 uv_node_to_blade[nid] = blade;
 662         }
 663
 664         map_gru_high(max_pnode);
 665         map_mmr_high(max_pnode);
 666         map_config_high(max_pnode);
 667         map_mmioh_high(max_pnode);
 668
 669         uv_cpu_init();
 670         uv_scir_register_cpu_notifier();
 671         proc_mkdir("sgi_uv", NULL);
 672 }