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Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / x86 / kernel / apic / x2apic_uv_x.c
blobecca5f41ad2c8f00c5a88f113451e1a5ed480ed7
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) 2007-2010 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/slab.h>
21 #include <linux/cpu.h>
22 #include <linux/init.h>
23 #include <linux/io.h>
24 #include <linux/pci.h>
25 #include <linux/kdebug.h>
26
27 #include <asm/uv/uv_mmrs.h>
28 #include <asm/uv/uv_hub.h>
29 #include <asm/current.h>
30 #include <asm/pgtable.h>
31 #include <asm/uv/bios.h>
32 #include <asm/uv/uv.h>
33 #include <asm/apic.h>
34 #include <asm/ipi.h>
35 #include <asm/smp.h>
36 #include <asm/x86_init.h>
37
38 DEFINE_PER_CPU(int, x2apic_extra_bits);
39
40 #define PR_DEVEL(fmt, args...) pr_devel("%s: " fmt, __func__, args)
41
42 static enum uv_system_type uv_system_type;
43 static u64 gru_start_paddr, gru_end_paddr;
44 static union uvh_apicid uvh_apicid;
45 int uv_min_hub_revision_id;
46 EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);
47 unsigned int uv_apicid_hibits;
48 EXPORT_SYMBOL_GPL(uv_apicid_hibits);
49 static DEFINE_SPINLOCK(uv_nmi_lock);
50
51 static unsigned long __init uv_early_read_mmr(unsigned long addr)
52 {
53 unsigned long val, *mmr;
54
55 mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr));
56 val = *mmr;
57 early_iounmap(mmr, sizeof(*mmr));
58 return val;
59 }
60
61 static inline bool is_GRU_range(u64 start, u64 end)
62 {
63 return start >= gru_start_paddr && end <= gru_end_paddr;
64 }
65
66 static bool uv_is_untracked_pat_range(u64 start, u64 end)
67 {
68 return is_ISA_range(start, end) || is_GRU_range(start, end);
69 }
70
71 static int __init early_get_pnodeid(void)
72 {
73 union uvh_node_id_u node_id;
74 union uvh_rh_gam_config_mmr_u m_n_config;
75 int pnode;
76
77 /* Currently, all blades have same revision number */
78 node_id.v = uv_early_read_mmr(UVH_NODE_ID);
79 m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_CONFIG_MMR);
80 uv_min_hub_revision_id = node_id.s.revision;
81
82 pnode = (node_id.s.node_id >> 1) & ((1 << m_n_config.s.n_skt) - 1);
83 return pnode;
84 }
85
86 static void __init early_get_apic_pnode_shift(void)
87 {
88 uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
89 if (!uvh_apicid.v)
90 /*
91 * Old bios, use default value
92 */
93 uvh_apicid.s.pnode_shift = UV_APIC_PNODE_SHIFT;
94 }
95
96 /*
97 * Add an extra bit as dictated by bios to the destination apicid of
98 * interrupts potentially passing through the UV HUB. This prevents
99 * a deadlock between interrupts and IO port operations.
100 */
101 static void __init uv_set_apicid_hibit(void)
102 {
103 union uvh_lb_target_physical_apic_id_mask_u apicid_mask;
104
105 apicid_mask.v = uv_early_read_mmr(UVH_LB_TARGET_PHYSICAL_APIC_ID_MASK);
106 uv_apicid_hibits = apicid_mask.s.bit_enables & UV_APICID_HIBIT_MASK;
107 }
108
109 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
110 {
111 int pnodeid;
112
113 if (!strcmp(oem_id, "SGI")) {
114 pnodeid = early_get_pnodeid();
115 early_get_apic_pnode_shift();
116 x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
117 x86_platform.nmi_init = uv_nmi_init;
118 if (!strcmp(oem_table_id, "UVL"))
119 uv_system_type = UV_LEGACY_APIC;
120 else if (!strcmp(oem_table_id, "UVX"))
121 uv_system_type = UV_X2APIC;
122 else if (!strcmp(oem_table_id, "UVH")) {
123 __this_cpu_write(x2apic_extra_bits,
124 pnodeid << uvh_apicid.s.pnode_shift);
125 uv_system_type = UV_NON_UNIQUE_APIC;
126 uv_set_apicid_hibit();
127 return 1;
128 }
129 }
130 return 0;
131 }
132
133 enum uv_system_type get_uv_system_type(void)
134 {
135 return uv_system_type;
136 }
137
138 int is_uv_system(void)
139 {
140 return uv_system_type != UV_NONE;
141 }
142 EXPORT_SYMBOL_GPL(is_uv_system);
143
144 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
145 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
146
147 struct uv_blade_info *uv_blade_info;
148 EXPORT_SYMBOL_GPL(uv_blade_info);
149
150 short *uv_node_to_blade;
151 EXPORT_SYMBOL_GPL(uv_node_to_blade);
152
153 short *uv_cpu_to_blade;
154 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);
155
156 short uv_possible_blades;
157 EXPORT_SYMBOL_GPL(uv_possible_blades);
158
159 unsigned long sn_rtc_cycles_per_second;
160 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
161
162 static const struct cpumask *uv_target_cpus(void)
163 {
164 return cpu_online_mask;
165 }
166
167 static void uv_vector_allocation_domain(int cpu, struct cpumask *retmask)
168 {
169 cpumask_clear(retmask);
170 cpumask_set_cpu(cpu, retmask);
171 }
172
173 static int __cpuinit uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
174 {
175 #ifdef CONFIG_SMP
176 unsigned long val;
177 int pnode;
178
179 pnode = uv_apicid_to_pnode(phys_apicid);
180 phys_apicid |= uv_apicid_hibits;
181 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
182 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
183 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
184 APIC_DM_INIT;
185 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
186 mdelay(10);
187
188 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
189 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
190 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
191 APIC_DM_STARTUP;
192 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
193
194 atomic_set(&init_deasserted, 1);
195 #endif
196 return 0;
197 }
198
199 static void uv_send_IPI_one(int cpu, int vector)
200 {
201 unsigned long apicid;
202 int pnode;
203
204 apicid = per_cpu(x86_cpu_to_apicid, cpu);
205 pnode = uv_apicid_to_pnode(apicid);
206 uv_hub_send_ipi(pnode, apicid, vector);
207 }
208
209 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
210 {
211 unsigned int cpu;
212
213 for_each_cpu(cpu, mask)
214 uv_send_IPI_one(cpu, vector);
215 }
216
217 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
218 {
219 unsigned int this_cpu = smp_processor_id();
220 unsigned int cpu;
221
222 for_each_cpu(cpu, mask) {
223 if (cpu != this_cpu)
224 uv_send_IPI_one(cpu, vector);
225 }
226 }
227
228 static void uv_send_IPI_allbutself(int vector)
229 {
230 unsigned int this_cpu = smp_processor_id();
231 unsigned int cpu;
232
233 for_each_online_cpu(cpu) {
234 if (cpu != this_cpu)
235 uv_send_IPI_one(cpu, vector);
236 }
237 }
238
239 static void uv_send_IPI_all(int vector)
240 {
241 uv_send_IPI_mask(cpu_online_mask, vector);
242 }
243
244 static int uv_apic_id_registered(void)
245 {
246 return 1;
247 }
248
249 static void uv_init_apic_ldr(void)
250 {
251 }
252
253 static unsigned int uv_cpu_mask_to_apicid(const struct cpumask *cpumask)
254 {
255 /*
256 * We're using fixed IRQ delivery, can only return one phys APIC ID.
257 * May as well be the first.
258 */
259 int cpu = cpumask_first(cpumask);
260
261 if ((unsigned)cpu < nr_cpu_ids)
262 return per_cpu(x86_cpu_to_apicid, cpu) | uv_apicid_hibits;
263 else
264 return BAD_APICID;
265 }
266
267 static unsigned int
268 uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
269 const struct cpumask *andmask)
270 {
271 int cpu;
272
273 /*
274 * We're using fixed IRQ delivery, can only return one phys APIC ID.
275 * May as well be the first.
276 */
277 for_each_cpu_and(cpu, cpumask, andmask) {
278 if (cpumask_test_cpu(cpu, cpu_online_mask))
279 break;
280 }
281 return per_cpu(x86_cpu_to_apicid, cpu) | uv_apicid_hibits;
282 }
283
284 static unsigned int x2apic_get_apic_id(unsigned long x)
285 {
286 unsigned int id;
287
288 WARN_ON(preemptible() && num_online_cpus() > 1);
289 id = x | __this_cpu_read(x2apic_extra_bits);
290
291 return id;
292 }
293
294 static unsigned long set_apic_id(unsigned int id)
295 {
296 unsigned long x;
297
298 /* maskout x2apic_extra_bits ? */
299 x = id;
300 return x;
301 }
302
303 static unsigned int uv_read_apic_id(void)
304 {
305
306 return x2apic_get_apic_id(apic_read(APIC_ID));
307 }
308
309 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
310 {
311 return uv_read_apic_id() >> index_msb;
312 }
313
314 static void uv_send_IPI_self(int vector)
315 {
316 apic_write(APIC_SELF_IPI, vector);
317 }
318
319 struct apic __refdata apic_x2apic_uv_x = {
320
321 .name = "UV large system",
322 .probe = NULL,
323 .acpi_madt_oem_check = uv_acpi_madt_oem_check,
324 .apic_id_registered = uv_apic_id_registered,
325
326 .irq_delivery_mode = dest_Fixed,
327 .irq_dest_mode = 0, /* physical */
328
329 .target_cpus = uv_target_cpus,
330 .disable_esr = 0,
331 .dest_logical = APIC_DEST_LOGICAL,
332 .check_apicid_used = NULL,
333 .check_apicid_present = NULL,
334
335 .vector_allocation_domain = uv_vector_allocation_domain,
336 .init_apic_ldr = uv_init_apic_ldr,
337
338 .ioapic_phys_id_map = NULL,
339 .setup_apic_routing = NULL,
340 .multi_timer_check = NULL,
341 .apicid_to_node = NULL,
342 .cpu_to_logical_apicid = NULL,
343 .cpu_present_to_apicid = default_cpu_present_to_apicid,
344 .apicid_to_cpu_present = NULL,
345 .setup_portio_remap = NULL,
346 .check_phys_apicid_present = default_check_phys_apicid_present,
347 .enable_apic_mode = NULL,
348 .phys_pkg_id = uv_phys_pkg_id,
349 .mps_oem_check = NULL,
350
351 .get_apic_id = x2apic_get_apic_id,
352 .set_apic_id = set_apic_id,
353 .apic_id_mask = 0xFFFFFFFFu,
354
355 .cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
356 .cpu_mask_to_apicid_and = uv_cpu_mask_to_apicid_and,
357
358 .send_IPI_mask = uv_send_IPI_mask,
359 .send_IPI_mask_allbutself = uv_send_IPI_mask_allbutself,
360 .send_IPI_allbutself = uv_send_IPI_allbutself,
361 .send_IPI_all = uv_send_IPI_all,
362 .send_IPI_self = uv_send_IPI_self,
363
364 .wakeup_secondary_cpu = uv_wakeup_secondary,
365 .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
366 .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
367 .wait_for_init_deassert = NULL,
368 .smp_callin_clear_local_apic = NULL,
369 .inquire_remote_apic = NULL,
370
371 .read = native_apic_msr_read,
372 .write = native_apic_msr_write,
373 .icr_read = native_x2apic_icr_read,
374 .icr_write = native_x2apic_icr_write,
375 .wait_icr_idle = native_x2apic_wait_icr_idle,
376 .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
377 };
378
379 static __cpuinit void set_x2apic_extra_bits(int pnode)
380 {
381 __this_cpu_write(x2apic_extra_bits, (pnode << 6));
382 }
383
384 /*
385 * Called on boot cpu.
386 */
387 static __init int boot_pnode_to_blade(int pnode)
388 {
389 int blade;
390
391 for (blade = 0; blade < uv_num_possible_blades(); blade++)
392 if (pnode == uv_blade_info[blade].pnode)
393 return blade;
394 BUG();
395 }
396
397 struct redir_addr {
398 unsigned long redirect;
399 unsigned long alias;
400 };
401
402 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
403
404 static __initdata struct redir_addr redir_addrs[] = {
405 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_0_MMR},
406 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_1_MMR},
407 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_2_MMR},
408 };
409
410 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
411 {
412 union uvh_rh_gam_alias210_overlay_config_2_mmr_u alias;
413 union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
414 int i;
415
416 for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
417 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
418 if (alias.s.enable && alias.s.base == 0) {
419 *size = (1UL << alias.s.m_alias);
420 redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
421 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
422 return;
423 }
424 }
425 *base = *size = 0;
426 }
427
428 enum map_type {map_wb, map_uc};
429
430 static __init void map_high(char *id, unsigned long base, int pshift,
431 int bshift, int max_pnode, enum map_type map_type)
432 {
433 unsigned long bytes, paddr;
434
435 paddr = base << pshift;
436 bytes = (1UL << bshift) * (max_pnode + 1);
437 printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
438 paddr + bytes);
439 if (map_type == map_uc)
440 init_extra_mapping_uc(paddr, bytes);
441 else
442 init_extra_mapping_wb(paddr, bytes);
443
444 }
445 static __init void map_gru_high(int max_pnode)
446 {
447 union uvh_rh_gam_gru_overlay_config_mmr_u gru;
448 int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
449
450 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
451 if (gru.s.enable) {
452 map_high("GRU", gru.s.base, shift, shift, max_pnode, map_wb);
453 gru_start_paddr = ((u64)gru.s.base << shift);
454 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
455
456 }
457 }
458
459 static __init void map_mmr_high(int max_pnode)
460 {
461 union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
462 int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
463
464 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
465 if (mmr.s.enable)
466 map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc);
467 }
468
469 static __init void map_mmioh_high(int max_pnode)
470 {
471 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
472 int shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
473
474 mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
475 if (mmioh.s.enable)
476 map_high("MMIOH", mmioh.s.base, shift, mmioh.s.m_io,
477 max_pnode, map_uc);
478 }
479
480 static __init void map_low_mmrs(void)
481 {
482 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
483 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
484 }
485
486 static __init void uv_rtc_init(void)
487 {
488 long status;
489 u64 ticks_per_sec;
490
491 status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK,
492 &ticks_per_sec);
493 if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
494 printk(KERN_WARNING
495 "unable to determine platform RTC clock frequency, "
496 "guessing.\n");
497 /* BIOS gives wrong value for clock freq. so guess */
498 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
499 } else
500 sn_rtc_cycles_per_second = ticks_per_sec;
501 }
502
503 /*
504 * percpu heartbeat timer
505 */
506 static void uv_heartbeat(unsigned long ignored)
507 {
508 struct timer_list *timer = &uv_hub_info->scir.timer;
509 unsigned char bits = uv_hub_info->scir.state;
510
511 /* flip heartbeat bit */
512 bits ^= SCIR_CPU_HEARTBEAT;
513
514 /* is this cpu idle? */
515 if (idle_cpu(raw_smp_processor_id()))
516 bits &= ~SCIR_CPU_ACTIVITY;
517 else
518 bits |= SCIR_CPU_ACTIVITY;
519
520 /* update system controller interface reg */
521 uv_set_scir_bits(bits);
522
523 /* enable next timer period */
524 mod_timer_pinned(timer, jiffies + SCIR_CPU_HB_INTERVAL);
525 }
526
527 static void __cpuinit uv_heartbeat_enable(int cpu)
528 {
529 while (!uv_cpu_hub_info(cpu)->scir.enabled) {
530 struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
531
532 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
533 setup_timer(timer, uv_heartbeat, cpu);
534 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
535 add_timer_on(timer, cpu);
536 uv_cpu_hub_info(cpu)->scir.enabled = 1;
537
538 /* also ensure that boot cpu is enabled */
539 cpu = 0;
540 }
541 }
542
543 #ifdef CONFIG_HOTPLUG_CPU
544 static void __cpuinit uv_heartbeat_disable(int cpu)
545 {
546 if (uv_cpu_hub_info(cpu)->scir.enabled) {
547 uv_cpu_hub_info(cpu)->scir.enabled = 0;
548 del_timer(&uv_cpu_hub_info(cpu)->scir.timer);
549 }
550 uv_set_cpu_scir_bits(cpu, 0xff);
551 }
552
553 /*
554 * cpu hotplug notifier
555 */
556 static __cpuinit int uv_scir_cpu_notify(struct notifier_block *self,
557 unsigned long action, void *hcpu)
558 {
559 long cpu = (long)hcpu;
560
561 switch (action) {
562 case CPU_ONLINE:
563 uv_heartbeat_enable(cpu);
564 break;
565 case CPU_DOWN_PREPARE:
566 uv_heartbeat_disable(cpu);
567 break;
568 default:
569 break;
570 }
571 return NOTIFY_OK;
572 }
573
574 static __init void uv_scir_register_cpu_notifier(void)
575 {
576 hotcpu_notifier(uv_scir_cpu_notify, 0);
577 }
578
579 #else /* !CONFIG_HOTPLUG_CPU */
580
581 static __init void uv_scir_register_cpu_notifier(void)
582 {
583 }
584
585 static __init int uv_init_heartbeat(void)
586 {
587 int cpu;
588
589 if (is_uv_system())
590 for_each_online_cpu(cpu)
591 uv_heartbeat_enable(cpu);
592 return 0;
593 }
594
595 late_initcall(uv_init_heartbeat);
596
597 #endif /* !CONFIG_HOTPLUG_CPU */
598
599 /* Direct Legacy VGA I/O traffic to designated IOH */
600 int uv_set_vga_state(struct pci_dev *pdev, bool decode,
601 unsigned int command_bits, bool change_bridge)
602 {
603 int domain, bus, rc;
604
605 PR_DEVEL("devfn %x decode %d cmd %x chg_brdg %d\n",
606 pdev->devfn, decode, command_bits, change_bridge);
607
608 if (!change_bridge)
609 return 0;
610
611 if ((command_bits & PCI_COMMAND_IO) == 0)
612 return 0;
613
614 domain = pci_domain_nr(pdev->bus);
615 bus = pdev->bus->number;
616
617 rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
618 PR_DEVEL("vga decode %d %x:%x, rc: %d\n", decode, domain, bus, rc);
619
620 return rc;
621 }
622
623 /*
624 * Called on each cpu to initialize the per_cpu UV data area.
625 * FIXME: hotplug not supported yet
626 */
627 void __cpuinit uv_cpu_init(void)
628 {
629 /* CPU 0 initilization will be done via uv_system_init. */
630 if (!uv_blade_info)
631 return;
632
633 uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
634
635 if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
636 set_x2apic_extra_bits(uv_hub_info->pnode);
637 }
638
639 /*
640 * When NMI is received, print a stack trace.
641 */
642 int uv_handle_nmi(struct notifier_block *self, unsigned long reason, void *data)
643 {
644 if (reason != DIE_NMI_IPI)
645 return NOTIFY_OK;
646
647 if (in_crash_kexec)
648 /* do nothing if entering the crash kernel */
649 return NOTIFY_OK;
650 /*
651 * Use a lock so only one cpu prints at a time
652 * to prevent intermixed output.
653 */
654 spin_lock(&uv_nmi_lock);
655 pr_info("NMI stack dump cpu %u:\n", smp_processor_id());
656 dump_stack();
657 spin_unlock(&uv_nmi_lock);
658
659 return NOTIFY_STOP;
660 }
661
662 static struct notifier_block uv_dump_stack_nmi_nb = {
663 .notifier_call = uv_handle_nmi
664 };
665
666 void uv_register_nmi_notifier(void)
667 {
668 if (register_die_notifier(&uv_dump_stack_nmi_nb))
669 printk(KERN_WARNING "UV NMI handler failed to register\n");
670 }
671
672 void uv_nmi_init(void)
673 {
674 unsigned int value;
675
676 /*
677 * Unmask NMI on all cpus
678 */
679 value = apic_read(APIC_LVT1) | APIC_DM_NMI;
680 value &= ~APIC_LVT_MASKED;
681 apic_write(APIC_LVT1, value);
682 }
683
684 void __init uv_system_init(void)
685 {
686 union uvh_rh_gam_config_mmr_u m_n_config;
687 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
688 union uvh_node_id_u node_id;
689 unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
690 int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val, n_io;
691 int gnode_extra, max_pnode = 0;
692 unsigned long mmr_base, present, paddr;
693 unsigned short pnode_mask, pnode_io_mask;
694
695 map_low_mmrs();
696
697 m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR );
698 m_val = m_n_config.s.m_skt;
699 n_val = m_n_config.s.n_skt;
700 mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
701 n_io = mmioh.s.n_io;
702 mmr_base =
703 uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
704 ~UV_MMR_ENABLE;
705 pnode_mask = (1 << n_val) - 1;
706 pnode_io_mask = (1 << n_io) - 1;
707
708 node_id.v = uv_read_local_mmr(UVH_NODE_ID);
709 gnode_extra = (node_id.s.node_id & ~((1 << n_val) - 1)) >> 1;
710 gnode_upper = ((unsigned long)gnode_extra << m_val);
711 printk(KERN_INFO "UV: N %d, M %d, N_IO: %d, gnode_upper 0x%lx, gnode_extra 0x%x, pnode_mask 0x%x, pnode_io_mask 0x%x\n",
712 n_val, m_val, n_io, gnode_upper, gnode_extra, pnode_mask, pnode_io_mask);
713
714 printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
715
716 for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
717 uv_possible_blades +=
718 hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
719 printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
720
721 bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
722 uv_blade_info = kmalloc(bytes, GFP_KERNEL);
723 BUG_ON(!uv_blade_info);
724 for (blade = 0; blade < uv_num_possible_blades(); blade++)
725 uv_blade_info[blade].memory_nid = -1;
726
727 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
728
729 bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
730 uv_node_to_blade = kmalloc(bytes, GFP_KERNEL);
731 BUG_ON(!uv_node_to_blade);
732 memset(uv_node_to_blade, 255, bytes);
733
734 bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
735 uv_cpu_to_blade = kmalloc(bytes, GFP_KERNEL);
736 BUG_ON(!uv_cpu_to_blade);
737 memset(uv_cpu_to_blade, 255, bytes);
738
739 blade = 0;
740 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
741 present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
742 for (j = 0; j < 64; j++) {
743 if (!test_bit(j, &present))
744 continue;
745 pnode = (i * 64 + j) & pnode_mask;
746 uv_blade_info[blade].pnode = pnode;
747 uv_blade_info[blade].nr_possible_cpus = 0;
748 uv_blade_info[blade].nr_online_cpus = 0;
749 max_pnode = max(pnode, max_pnode);
750 blade++;
751 }
752 }
753
754 uv_bios_init();
755 uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id,
756 &sn_region_size, &system_serial_number);
757 uv_rtc_init();
758
759 for_each_present_cpu(cpu) {
760 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
761
762 nid = cpu_to_node(cpu);
763 /*
764 * apic_pnode_shift must be set before calling uv_apicid_to_pnode();
765 */
766 uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
767 uv_cpu_hub_info(cpu)->apic_pnode_shift = uvh_apicid.s.pnode_shift;
768 pnode = uv_apicid_to_pnode(apicid);
769 blade = boot_pnode_to_blade(pnode);
770 lcpu = uv_blade_info[blade].nr_possible_cpus;
771 uv_blade_info[blade].nr_possible_cpus++;
772
773 /* Any node on the blade, else will contain -1. */
774 uv_blade_info[blade].memory_nid = nid;
775
776 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
777 uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
778 uv_cpu_hub_info(cpu)->m_val = m_val;
779 uv_cpu_hub_info(cpu)->n_val = n_val;
780 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
781 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
782 uv_cpu_hub_info(cpu)->pnode = pnode;
783 uv_cpu_hub_info(cpu)->gpa_mask = (1UL << (m_val + n_val)) - 1;
784 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
785 uv_cpu_hub_info(cpu)->gnode_extra = gnode_extra;
786 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
787 uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
788 uv_cpu_hub_info(cpu)->scir.offset = uv_scir_offset(apicid);
789 uv_node_to_blade[nid] = blade;
790 uv_cpu_to_blade[cpu] = blade;
791 }
792
793 /* Add blade/pnode info for nodes without cpus */
794 for_each_online_node(nid) {
795 if (uv_node_to_blade[nid] >= 0)
796 continue;
797 paddr = node_start_pfn(nid) << PAGE_SHIFT;
798 paddr = uv_soc_phys_ram_to_gpa(paddr);
799 pnode = (paddr >> m_val) & pnode_mask;
800 blade = boot_pnode_to_blade(pnode);
801 uv_node_to_blade[nid] = blade;
802 }
803
804 map_gru_high(max_pnode);
805 map_mmr_high(max_pnode);
806 map_mmioh_high(max_pnode & pnode_io_mask);
807
808 uv_cpu_init();
809 uv_scir_register_cpu_notifier();
810 uv_register_nmi_notifier();
811 proc_mkdir("sgi_uv", NULL);
812
813 /* register Legacy VGA I/O redirection handler */
814 pci_register_set_vga_state(uv_set_vga_state);
815 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree