1 /*
2 * acpi.c - Architecture-Specific Low-Level ACPI Support
3 *
4 * Copyright (C) 1999 VA Linux Systems
5 * Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
6 * Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
7 * David Mosberger-Tang <davidm@hpl.hp.com>
8 * Copyright (C) 2000 Intel Corp.
9 * Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
10 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
11 * Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
12 * Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
13 * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
14 * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
15 *
16 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
17 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 *
32 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
33 */
34
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/sched.h>
39 #include <linux/smp.h>
40 #include <linux/string.h>
41 #include <linux/types.h>
42 #include <linux/irq.h>
43 #include <linux/acpi.h>
44 #include <linux/efi.h>
45 #include <linux/mmzone.h>
46 #include <linux/nodemask.h>
47 #include <asm/io.h>
48 #include <asm/iosapic.h>
49 #include <asm/machvec.h>
50 #include <asm/page.h>
51 #include <asm/system.h>
52 #include <asm/numa.h>
53 #include <asm/sal.h>
54 #include <asm/cyclone.h>
55 #include <asm/xen/hypervisor.h>
56
57 #define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60
61 #define PREFIX "ACPI: "
62
63 void (*pm_idle) (void);
64 EXPORT_SYMBOL(pm_idle);
65 void (*pm_power_off) (void);
66 EXPORT_SYMBOL(pm_power_off);
67
68 u32 acpi_rsdt_forced;
69 unsigned int acpi_cpei_override;
70 unsigned int acpi_cpei_phys_cpuid;
71
72 unsigned long acpi_wakeup_address = 0;
73
74 #ifdef CONFIG_IA64_GENERIC
acpi_find_rsdp(void)75 static unsigned long __init acpi_find_rsdp(void)
76 {
77 unsigned long rsdp_phys = 0;
78
79 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
80 rsdp_phys = efi.acpi20;
81 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
82 printk(KERN_WARNING PREFIX
83 "v1.0/r0.71 tables no longer supported\n");
84 return rsdp_phys;
85 }
86 #endif
87
88 const char __init *
acpi_get_sysname(void)89 acpi_get_sysname(void)
90 {
91 #ifdef CONFIG_IA64_GENERIC
92 unsigned long rsdp_phys;
93 struct acpi_table_rsdp *rsdp;
94 struct acpi_table_xsdt *xsdt;
95 struct acpi_table_header *hdr;
96 #ifdef CONFIG_DMAR
97 u64 i, nentries;
98 #endif
99
100 rsdp_phys = acpi_find_rsdp();
101 if (!rsdp_phys) {
102 printk(KERN_ERR
103 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
104 return "dig";
105 }
106
107 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
108 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
109 printk(KERN_ERR
110 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
111 return "dig";
112 }
113
114 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
115 hdr = &xsdt->header;
116 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
117 printk(KERN_ERR
118 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
119 return "dig";
120 }
121
122 if (!strcmp(hdr->oem_id, "HP")) {
123 return "hpzx1";
124 } else if (!strcmp(hdr->oem_id, "SGI")) {
125 if (!strcmp(hdr->oem_table_id + 4, "UV"))
126 return "uv";
127 else
128 return "sn2";
129 } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
130 return "xen";
131 }
132
133 #ifdef CONFIG_DMAR
134 /* Look for Intel IOMMU */
135 nentries = (hdr->length - sizeof(*hdr)) /
136 sizeof(xsdt->table_offset_entry[0]);
137 for (i = 0; i < nentries; i++) {
138 hdr = __va(xsdt->table_offset_entry[i]);
139 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
140 sizeof(ACPI_SIG_DMAR) - 1) == 0)
141 return "dig_vtd";
142 }
143 #endif
144
145 return "dig";
146 #else
147 # if defined (CONFIG_IA64_HP_SIM)
148 return "hpsim";
149 # elif defined (CONFIG_IA64_HP_ZX1)
150 return "hpzx1";
151 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
152 return "hpzx1_swiotlb";
153 # elif defined (CONFIG_IA64_SGI_SN2)
154 return "sn2";
155 # elif defined (CONFIG_IA64_SGI_UV)
156 return "uv";
157 # elif defined (CONFIG_IA64_DIG)
158 return "dig";
159 # elif defined (CONFIG_IA64_XEN_GUEST)
160 return "xen";
161 # elif defined(CONFIG_IA64_DIG_VTD)
162 return "dig_vtd";
163 # else
164 # error Unknown platform. Fix acpi.c.
165 # endif
166 #endif
167 }
168
169 #ifdef CONFIG_ACPI
170
171 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
172
173 /* Array to record platform interrupt vectors for generic interrupt routing. */
174 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
175 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
176 };
177
178 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
179
180 /*
181 * Interrupt routing API for device drivers. Provides interrupt vector for
182 * a generic platform event. Currently only CPEI is implemented.
183 */
acpi_request_vector(u32 int_type)184 int acpi_request_vector(u32 int_type)
185 {
186 int vector = -1;
187
188 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
189 /* corrected platform error interrupt */
190 vector = platform_intr_list[int_type];
191 } else
192 printk(KERN_ERR
193 "acpi_request_vector(): invalid interrupt type\n");
194 return vector;
195 }
196
__acpi_map_table(unsigned long phys_addr,unsigned long size)197 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
198 {
199 return __va(phys_addr);
200 }
201
202 /* --------------------------------------------------------------------------
203 Boot-time Table Parsing
204 -------------------------------------------------------------------------- */
205
206 static int available_cpus __initdata;
207 struct acpi_table_madt *acpi_madt __initdata;
208 static u8 has_8259;
209
210 static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,const unsigned long end)211 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
212 const unsigned long end)
213 {
214 struct acpi_madt_local_apic_override *lapic;
215
216 lapic = (struct acpi_madt_local_apic_override *)header;
217
218 if (BAD_MADT_ENTRY(lapic, end))
219 return -EINVAL;
220
221 if (lapic->address) {
222 iounmap(ipi_base_addr);
223 ipi_base_addr = ioremap(lapic->address, 0);
224 }
225 return 0;
226 }
227
228 static int __init
acpi_parse_lsapic(struct acpi_subtable_header * header,const unsigned long end)229 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
230 {
231 struct acpi_madt_local_sapic *lsapic;
232
233 lsapic = (struct acpi_madt_local_sapic *)header;
234
235 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
236
237 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
238 #ifdef CONFIG_SMP
239 smp_boot_data.cpu_phys_id[available_cpus] =
240 (lsapic->id << 8) | lsapic->eid;
241 #endif
242 ++available_cpus;
243 }
244
245 total_cpus++;
246 return 0;
247 }
248
249 static int __init
acpi_parse_lapic_nmi(struct acpi_subtable_header * header,const unsigned long end)250 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
251 {
252 struct acpi_madt_local_apic_nmi *lacpi_nmi;
253
254 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
255
256 if (BAD_MADT_ENTRY(lacpi_nmi, end))
257 return -EINVAL;
258
259 /* TBD: Support lapic_nmi entries */
260 return 0;
261 }
262
263 static int __init
acpi_parse_iosapic(struct acpi_subtable_header * header,const unsigned long end)264 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
265 {
266 struct acpi_madt_io_sapic *iosapic;
267
268 iosapic = (struct acpi_madt_io_sapic *)header;
269
270 if (BAD_MADT_ENTRY(iosapic, end))
271 return -EINVAL;
272
273 return iosapic_init(iosapic->address, iosapic->global_irq_base);
274 }
275
276 static unsigned int __initdata acpi_madt_rev;
277
278 static int __init
acpi_parse_plat_int_src(struct acpi_subtable_header * header,const unsigned long end)279 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
280 const unsigned long end)
281 {
282 struct acpi_madt_interrupt_source *plintsrc;
283 int vector;
284
285 plintsrc = (struct acpi_madt_interrupt_source *)header;
286
287 if (BAD_MADT_ENTRY(plintsrc, end))
288 return -EINVAL;
289
290 /*
291 * Get vector assignment for this interrupt, set attributes,
292 * and program the IOSAPIC routing table.
293 */
294 vector = iosapic_register_platform_intr(plintsrc->type,
295 plintsrc->global_irq,
296 plintsrc->io_sapic_vector,
297 plintsrc->eid,
298 plintsrc->id,
299 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
300 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
301 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
302 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
303 ACPI_MADT_TRIGGER_EDGE) ?
304 IOSAPIC_EDGE : IOSAPIC_LEVEL);
305
306 platform_intr_list[plintsrc->type] = vector;
307 if (acpi_madt_rev > 1) {
308 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
309 }
310
311 /*
312 * Save the physical id, so we can check when its being removed
313 */
314 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
315
316 return 0;
317 }
318
319 #ifdef CONFIG_HOTPLUG_CPU
can_cpei_retarget(void)320 unsigned int can_cpei_retarget(void)
321 {
322 extern int cpe_vector;
323 extern unsigned int force_cpei_retarget;
324
325 /*
326 * Only if CPEI is supported and the override flag
327 * is present, otherwise return that its re-targettable
328 * if we are in polling mode.
329 */
330 if (cpe_vector > 0) {
331 if (acpi_cpei_override || force_cpei_retarget)
332 return 1;
333 else
334 return 0;
335 }
336 return 1;
337 }
338
is_cpu_cpei_target(unsigned int cpu)339 unsigned int is_cpu_cpei_target(unsigned int cpu)
340 {
341 unsigned int logical_id;
342
343 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
344
345 if (logical_id == cpu)
346 return 1;
347 else
348 return 0;
349 }
350
set_cpei_target_cpu(unsigned int cpu)351 void set_cpei_target_cpu(unsigned int cpu)
352 {
353 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
354 }
355 #endif
356
get_cpei_target_cpu(void)357 unsigned int get_cpei_target_cpu(void)
358 {
359 return acpi_cpei_phys_cpuid;
360 }
361
362 static int __init
acpi_parse_int_src_ovr(struct acpi_subtable_header * header,const unsigned long end)363 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
364 const unsigned long end)
365 {
366 struct acpi_madt_interrupt_override *p;
367
368 p = (struct acpi_madt_interrupt_override *)header;
369
370 if (BAD_MADT_ENTRY(p, end))
371 return -EINVAL;
372
373 iosapic_override_isa_irq(p->source_irq, p->global_irq,
374 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
375 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
376 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
377 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
378 ACPI_MADT_TRIGGER_EDGE) ?
379 IOSAPIC_EDGE : IOSAPIC_LEVEL);
380 return 0;
381 }
382
383 static int __init
acpi_parse_nmi_src(struct acpi_subtable_header * header,const unsigned long end)384 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
385 {
386 struct acpi_madt_nmi_source *nmi_src;
387
388 nmi_src = (struct acpi_madt_nmi_source *)header;
389
390 if (BAD_MADT_ENTRY(nmi_src, end))
391 return -EINVAL;
392
393 /* TBD: Support nimsrc entries */
394 return 0;
395 }
396
acpi_madt_oem_check(char * oem_id,char * oem_table_id)397 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
398 {
399 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
400
401 /*
402 * Unfortunately ITC_DRIFT is not yet part of the
403 * official SAL spec, so the ITC_DRIFT bit is not
404 * set by the BIOS on this hardware.
405 */
406 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
407
408 cyclone_setup();
409 }
410 }
411
acpi_parse_madt(struct acpi_table_header * table)412 static int __init acpi_parse_madt(struct acpi_table_header *table)
413 {
414 if (!table)
415 return -EINVAL;
416
417 acpi_madt = (struct acpi_table_madt *)table;
418
419 acpi_madt_rev = acpi_madt->header.revision;
420
421 /* remember the value for reference after free_initmem() */
422 #ifdef CONFIG_ITANIUM
423 has_8259 = 1; /* Firmware on old Itanium systems is broken */
424 #else
425 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
426 #endif
427 iosapic_system_init(has_8259);
428
429 /* Get base address of IPI Message Block */
430
431 if (acpi_madt->address)
432 ipi_base_addr = ioremap(acpi_madt->address, 0);
433
434 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
435
436 acpi_madt_oem_check(acpi_madt->header.oem_id,
437 acpi_madt->header.oem_table_id);
438
439 return 0;
440 }
441
442 #ifdef CONFIG_ACPI_NUMA
443
444 #undef SLIT_DEBUG
445
446 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
447
448 static int __initdata srat_num_cpus; /* number of cpus */
449 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
450 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
451 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
452 static struct acpi_table_slit __initdata *slit_table;
453 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
454
get_processor_proximity_domain(struct acpi_srat_cpu_affinity * pa)455 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
456 {
457 int pxm;
458
459 pxm = pa->proximity_domain_lo;
460 if (ia64_platform_is("sn2"))
461 pxm += pa->proximity_domain_hi[0] << 8;
462 return pxm;
463 }
464
get_memory_proximity_domain(struct acpi_srat_mem_affinity * ma)465 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
466 {
467 int pxm;
468
469 pxm = ma->proximity_domain;
470 if (!ia64_platform_is("sn2"))
471 pxm &= 0xff;
472
473 return pxm;
474 }
475
476 /*
477 * ACPI 2.0 SLIT (System Locality Information Table)
478 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
479 */
acpi_numa_slit_init(struct acpi_table_slit * slit)480 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
481 {
482 u32 len;
483
484 len = sizeof(struct acpi_table_header) + 8
485 + slit->locality_count * slit->locality_count;
486 if (slit->header.length != len) {
487 printk(KERN_ERR
488 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
489 len, slit->header.length);
490 return;
491 }
492 slit_table = slit;
493 }
494
495 void __init
acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity * pa)496 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
497 {
498 int pxm;
499
500 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
501 return;
502
503 pxm = get_processor_proximity_domain(pa);
504
505 /* record this node in proximity bitmap */
506 pxm_bit_set(pxm);
507
508 node_cpuid[srat_num_cpus].phys_id =
509 (pa->apic_id << 8) | (pa->local_sapic_eid);
510 /* nid should be overridden as logical node id later */
511 node_cpuid[srat_num_cpus].nid = pxm;
512 cpu_set(srat_num_cpus, early_cpu_possible_map);
513 srat_num_cpus++;
514 }
515
516 void __init
acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity * ma)517 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
518 {
519 unsigned long paddr, size;
520 int pxm;
521 struct node_memblk_s *p, *q, *pend;
522
523 pxm = get_memory_proximity_domain(ma);
524
525 /* fill node memory chunk structure */
526 paddr = ma->base_address;
527 size = ma->length;
528
529 /* Ignore disabled entries */
530 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
531 return;
532
533 /* record this node in proximity bitmap */
534 pxm_bit_set(pxm);
535
536 /* Insertion sort based on base address */
537 pend = &node_memblk[num_node_memblks];
538 for (p = &node_memblk[0]; p < pend; p++) {
539 if (paddr < p->start_paddr)
540 break;
541 }
542 if (p < pend) {
543 for (q = pend - 1; q >= p; q--)
544 *(q + 1) = *q;
545 }
546 p->start_paddr = paddr;
547 p->size = size;
548 p->nid = pxm;
549 num_node_memblks++;
550 }
551
acpi_numa_arch_fixup(void)552 void __init acpi_numa_arch_fixup(void)
553 {
554 int i, j, node_from, node_to;
555
556 /* If there's no SRAT, fix the phys_id and mark node 0 online */
557 if (srat_num_cpus == 0) {
558 node_set_online(0);
559 node_cpuid[0].phys_id = hard_smp_processor_id();
560 return;
561 }
562
563 /*
564 * MCD - This can probably be dropped now. No need for pxm ID to node ID
565 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
566 */
567 nodes_clear(node_online_map);
568 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
569 if (pxm_bit_test(i)) {
570 int nid = acpi_map_pxm_to_node(i);
571 node_set_online(nid);
572 }
573 }
574
575 /* set logical node id in memory chunk structure */
576 for (i = 0; i < num_node_memblks; i++)
577 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
578
579 /* assign memory bank numbers for each chunk on each node */
580 for_each_online_node(i) {
581 int bank;
582
583 bank = 0;
584 for (j = 0; j < num_node_memblks; j++)
585 if (node_memblk[j].nid == i)
586 node_memblk[j].bank = bank++;
587 }
588
589 /* set logical node id in cpu structure */
590 for_each_possible_early_cpu(i)
591 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
592
593 printk(KERN_INFO "Number of logical nodes in system = %d\n",
594 num_online_nodes());
595 printk(KERN_INFO "Number of memory chunks in system = %d\n",
596 num_node_memblks);
597
598 if (!slit_table) {
599 for (i = 0; i < MAX_NUMNODES; i++)
600 for (j = 0; j < MAX_NUMNODES; j++)
601 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
602 REMOTE_DISTANCE;
603 return;
604 }
605
606 memset(numa_slit, -1, sizeof(numa_slit));
607 for (i = 0; i < slit_table->locality_count; i++) {
608 if (!pxm_bit_test(i))
609 continue;
610 node_from = pxm_to_node(i);
611 for (j = 0; j < slit_table->locality_count; j++) {
612 if (!pxm_bit_test(j))
613 continue;
614 node_to = pxm_to_node(j);
615 node_distance(node_from, node_to) =
616 slit_table->entry[i * slit_table->locality_count + j];
617 }
618 }
619
620 #ifdef SLIT_DEBUG
621 printk("ACPI 2.0 SLIT locality table:\n");
622 for_each_online_node(i) {
623 for_each_online_node(j)
624 printk("%03d ", node_distance(i, j));
625 printk("\n");
626 }
627 #endif
628 }
629 #endif /* CONFIG_ACPI_NUMA */
630
631 /*
632 * success: return IRQ number (>=0)
633 * failure: return < 0
634 */
acpi_register_gsi(u32 gsi,int triggering,int polarity)635 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
636 {
637 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
638 return gsi;
639
640 if (has_8259 && gsi < 16)
641 return isa_irq_to_vector(gsi);
642
643 return iosapic_register_intr(gsi,
644 (polarity ==
645 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
646 IOSAPIC_POL_LOW,
647 (triggering ==
648 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
649 IOSAPIC_LEVEL);
650 }
651
acpi_unregister_gsi(u32 gsi)652 void acpi_unregister_gsi(u32 gsi)
653 {
654 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
655 return;
656
657 if (has_8259 && gsi < 16)
658 return;
659
660 iosapic_unregister_intr(gsi);
661 }
662
acpi_parse_fadt(struct acpi_table_header * table)663 static int __init acpi_parse_fadt(struct acpi_table_header *table)
664 {
665 struct acpi_table_header *fadt_header;
666 struct acpi_table_fadt *fadt;
667
668 if (!table)
669 return -EINVAL;
670
671 fadt_header = (struct acpi_table_header *)table;
672 if (fadt_header->revision != 3)
673 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
674
675 fadt = (struct acpi_table_fadt *)fadt_header;
676
677 acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
678 return 0;
679 }
680
early_acpi_boot_init(void)681 int __init early_acpi_boot_init(void)
682 {
683 int ret;
684
685 /*
686 * do a partial walk of MADT to determine how many CPUs
687 * we have including offline CPUs
688 */
689 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
690 printk(KERN_ERR PREFIX "Can't find MADT\n");
691 return 0;
692 }
693
694 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
695 acpi_parse_lsapic, NR_CPUS);
696 if (ret < 1)
697 printk(KERN_ERR PREFIX
698 "Error parsing MADT - no LAPIC entries\n");
699
700 return 0;
701 }
702
703
704
acpi_boot_init(void)705 int __init acpi_boot_init(void)
706 {
707
708 /*
709 * MADT
710 * ----
711 * Parse the Multiple APIC Description Table (MADT), if exists.
712 * Note that this table provides platform SMP configuration
713 * information -- the successor to MPS tables.
714 */
715
716 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
717 printk(KERN_ERR PREFIX "Can't find MADT\n");
718 goto skip_madt;
719 }
720
721 /* Local APIC */
722
723 if (acpi_table_parse_madt
724 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
725 printk(KERN_ERR PREFIX
726 "Error parsing LAPIC address override entry\n");
727
728 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
729 < 0)
730 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
731
732 /* I/O APIC */
733
734 if (acpi_table_parse_madt
735 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
736 if (!ia64_platform_is("sn2"))
737 printk(KERN_ERR PREFIX
738 "Error parsing MADT - no IOSAPIC entries\n");
739 }
740
741 /* System-Level Interrupt Routing */
742
743 if (acpi_table_parse_madt
744 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
745 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
746 printk(KERN_ERR PREFIX
747 "Error parsing platform interrupt source entry\n");
748
749 if (acpi_table_parse_madt
750 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
751 printk(KERN_ERR PREFIX
752 "Error parsing interrupt source overrides entry\n");
753
754 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
755 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
756 skip_madt:
757
758 /*
759 * FADT says whether a legacy keyboard controller is present.
760 * The FADT also contains an SCI_INT line, by which the system
761 * gets interrupts such as power and sleep buttons. If it's not
762 * on a Legacy interrupt, it needs to be setup.
763 */
764 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
765 printk(KERN_ERR PREFIX "Can't find FADT\n");
766
767 #ifdef CONFIG_SMP
768 if (available_cpus == 0) {
769 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
770 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
771 smp_boot_data.cpu_phys_id[available_cpus] =
772 hard_smp_processor_id();
773 available_cpus = 1; /* We've got at least one of these, no? */
774 }
775 smp_boot_data.cpu_count = available_cpus;
776
777 smp_build_cpu_map();
778 # ifdef CONFIG_ACPI_NUMA
779 if (srat_num_cpus == 0) {
780 int cpu, i = 1;
781 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
782 if (smp_boot_data.cpu_phys_id[cpu] !=
783 hard_smp_processor_id())
784 node_cpuid[i++].phys_id =
785 smp_boot_data.cpu_phys_id[cpu];
786 }
787 # endif
788 #endif
789 #ifdef CONFIG_ACPI_NUMA
790 build_cpu_to_node_map();
791 #endif
792 /* Make boot-up look pretty */
793 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
794 total_cpus);
795 return 0;
796 }
797
acpi_gsi_to_irq(u32 gsi,unsigned int * irq)798 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
799 {
800 int tmp;
801
802 if (has_8259 && gsi < 16)
803 *irq = isa_irq_to_vector(gsi);
804 else {
805 tmp = gsi_to_irq(gsi);
806 if (tmp == -1)
807 return -1;
808 *irq = tmp;
809 }
810 return 0;
811 }
812
813 /*
814 * ACPI based hotplug CPU support
815 */
816 #ifdef CONFIG_ACPI_HOTPLUG_CPU
817 static
acpi_map_cpu2node(acpi_handle handle,int cpu,int physid)818 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
819 {
820 #ifdef CONFIG_ACPI_NUMA
821 int pxm_id;
822 int nid;
823
824 pxm_id = acpi_get_pxm(handle);
825 /*
826 * We don't have cpu-only-node hotadd. But if the system equips
827 * SRAT table, pxm is already found and node is ready.
828 * So, just pxm_to_nid(pxm) is OK.
829 * This code here is for the system which doesn't have full SRAT
830 * table for possible cpus.
831 */
832 nid = acpi_map_pxm_to_node(pxm_id);
833 node_cpuid[cpu].phys_id = physid;
834 node_cpuid[cpu].nid = nid;
835 #endif
836 return (0);
837 }
838
839 int additional_cpus __initdata = -1;
840
setup_additional_cpus(char * s)841 static __init int setup_additional_cpus(char *s)
842 {
843 if (s)
844 additional_cpus = simple_strtol(s, NULL, 0);
845
846 return 0;
847 }
848
849 early_param("additional_cpus", setup_additional_cpus);
850
851 /*
852 * cpu_possible_map should be static, it cannot change as CPUs
853 * are onlined, or offlined. The reason is per-cpu data-structures
854 * are allocated by some modules at init time, and dont expect to
855 * do this dynamically on cpu arrival/departure.
856 * cpu_present_map on the other hand can change dynamically.
857 * In case when cpu_hotplug is not compiled, then we resort to current
858 * behaviour, which is cpu_possible == cpu_present.
859 * - Ashok Raj
860 *
861 * Three ways to find out the number of additional hotplug CPUs:
862 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
863 * - The user can overwrite it with additional_cpus=NUM
864 * - Otherwise don't reserve additional CPUs.
865 */
prefill_possible_map(void)866 __init void prefill_possible_map(void)
867 {
868 int i;
869 int possible, disabled_cpus;
870
871 disabled_cpus = total_cpus - available_cpus;
872
873 if (additional_cpus == -1) {
874 if (disabled_cpus > 0)
875 additional_cpus = disabled_cpus;
876 else
877 additional_cpus = 0;
878 }
879
880 possible = available_cpus + additional_cpus;
881
882 if (possible > NR_CPUS)
883 possible = NR_CPUS;
884
885 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
886 possible, max((possible - available_cpus), 0));
887
888 for (i = 0; i < possible; i++)
889 cpu_set(i, cpu_possible_map);
890 }
891
acpi_map_lsapic(acpi_handle handle,int * pcpu)892 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
893 {
894 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
895 union acpi_object *obj;
896 struct acpi_madt_local_sapic *lsapic;
897 cpumask_t tmp_map;
898 int cpu, physid;
899
900 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
901 return -EINVAL;
902
903 if (!buffer.length || !buffer.pointer)
904 return -EINVAL;
905
906 obj = buffer.pointer;
907 if (obj->type != ACPI_TYPE_BUFFER)
908 {
909 kfree(buffer.pointer);
910 return -EINVAL;
911 }
912
913 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
914
915 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
916 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
917 kfree(buffer.pointer);
918 return -EINVAL;
919 }
920
921 physid = ((lsapic->id << 8) | (lsapic->eid));
922
923 kfree(buffer.pointer);
924 buffer.length = ACPI_ALLOCATE_BUFFER;
925 buffer.pointer = NULL;
926
927 cpus_complement(tmp_map, cpu_present_map);
928 cpu = first_cpu(tmp_map);
929 if (cpu >= NR_CPUS)
930 return -EINVAL;
931
932 acpi_map_cpu2node(handle, cpu, physid);
933
934 cpu_set(cpu, cpu_present_map);
935 ia64_cpu_to_sapicid[cpu] = physid;
936
937 *pcpu = cpu;
938 return (0);
939 }
940
941 EXPORT_SYMBOL(acpi_map_lsapic);
942
acpi_unmap_lsapic(int cpu)943 int acpi_unmap_lsapic(int cpu)
944 {
945 ia64_cpu_to_sapicid[cpu] = -1;
946 cpu_clear(cpu, cpu_present_map);
947
948 #ifdef CONFIG_ACPI_NUMA
949 /* NUMA specific cleanup's */
950 #endif
951
952 return (0);
953 }
954
955 EXPORT_SYMBOL(acpi_unmap_lsapic);
956 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
957
958 #ifdef CONFIG_ACPI_NUMA
959 static acpi_status __devinit
acpi_map_iosapic(acpi_handle handle,u32 depth,void * context,void ** ret)960 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
961 {
962 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
963 union acpi_object *obj;
964 struct acpi_madt_io_sapic *iosapic;
965 unsigned int gsi_base;
966 int pxm, node;
967
968 /* Only care about objects w/ a method that returns the MADT */
969 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
970 return AE_OK;
971
972 if (!buffer.length || !buffer.pointer)
973 return AE_OK;
974
975 obj = buffer.pointer;
976 if (obj->type != ACPI_TYPE_BUFFER ||
977 obj->buffer.length < sizeof(*iosapic)) {
978 kfree(buffer.pointer);
979 return AE_OK;
980 }
981
982 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
983
984 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
985 kfree(buffer.pointer);
986 return AE_OK;
987 }
988
989 gsi_base = iosapic->global_irq_base;
990
991 kfree(buffer.pointer);
992
993 /*
994 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
995 * us which node to associate this with.
996 */
997 pxm = acpi_get_pxm(handle);
998 if (pxm < 0)
999 return AE_OK;
1000
1001 node = pxm_to_node(pxm);
1002
1003 if (node >= MAX_NUMNODES || !node_online(node) ||
1004 cpumask_empty(cpumask_of_node(node)))
1005 return AE_OK;
1006
1007 /* We know a gsi to node mapping! */
1008 map_iosapic_to_node(gsi_base, node);
1009 return AE_OK;
1010 }
1011
1012 static int __init
acpi_map_iosapics(void)1013 acpi_map_iosapics (void)
1014 {
1015 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1016 return 0;
1017 }
1018
1019 fs_initcall(acpi_map_iosapics);
1020 #endif /* CONFIG_ACPI_NUMA */
1021
acpi_register_ioapic(acpi_handle handle,u64 phys_addr,u32 gsi_base)1022 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1023 {
1024 int err;
1025
1026 if ((err = iosapic_init(phys_addr, gsi_base)))
1027 return err;
1028
1029 #ifdef CONFIG_ACPI_NUMA
1030 acpi_map_iosapic(handle, 0, NULL, NULL);
1031 #endif /* CONFIG_ACPI_NUMA */
1032
1033 return 0;
1034 }
1035
1036 EXPORT_SYMBOL(acpi_register_ioapic);
1037
acpi_unregister_ioapic(acpi_handle handle,u32 gsi_base)1038 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1039 {
1040 return iosapic_remove(gsi_base);
1041 }
1042
1043 EXPORT_SYMBOL(acpi_unregister_ioapic);
1044
1045 /*
1046 * acpi_save_state_mem() - save kernel state
1047 *
1048 * TBD when when IA64 starts to support suspend...
1049 */
acpi_save_state_mem(void)1050 int acpi_save_state_mem(void) { return 0; }
1051
1052 /*
1053 * acpi_restore_state()
1054 */
acpi_restore_state_mem(void)1055 void acpi_restore_state_mem(void) {}
1056
1057 /*
1058 * do_suspend_lowlevel()
1059 */
do_suspend_lowlevel(void)1060 void do_suspend_lowlevel(void) {}
1061
1062 #endif /* CONFIG_ACPI */
1063