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1da177e4 LT |
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> | |
55e59c51 | 14 | * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com> |
1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
5a0e3ad6 | 47 | #include <linux/slab.h> |
d8191fa4 | 48 | #include <acpi/processor.h> |
1da177e4 LT |
49 | #include <asm/io.h> |
50 | #include <asm/iosapic.h> | |
51 | #include <asm/machvec.h> | |
52 | #include <asm/page.h> | |
53 | #include <asm/system.h> | |
54 | #include <asm/numa.h> | |
55 | #include <asm/sal.h> | |
56 | #include <asm/cyclone.h> | |
a0df655c | 57 | #include <asm/xen/hypervisor.h> |
1da177e4 LT |
58 | |
59 | #define BAD_MADT_ENTRY(entry, end) ( \ | |
60 | (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ | |
5f3b1a8b | 61 | ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) |
1da177e4 LT |
62 | |
63 | #define PREFIX "ACPI: " | |
64 | ||
237889bf | 65 | u32 acpi_rsdt_forced; |
55e59c51 AR |
66 | unsigned int acpi_cpei_override; |
67 | unsigned int acpi_cpei_phys_cpuid; | |
68 | ||
e8b2fd01 LB |
69 | unsigned long acpi_wakeup_address = 0; |
70 | ||
239665a3 LB |
71 | #ifdef CONFIG_IA64_GENERIC |
72 | static unsigned long __init acpi_find_rsdp(void) | |
73 | { | |
74 | unsigned long rsdp_phys = 0; | |
75 | ||
76 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) | |
77 | rsdp_phys = efi.acpi20; | |
78 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) | |
79 | printk(KERN_WARNING PREFIX | |
80 | "v1.0/r0.71 tables no longer supported\n"); | |
81 | return rsdp_phys; | |
82 | } | |
239665a3 | 83 | |
d57c4a38 TL |
84 | const char __init * |
85 | acpi_get_sysname(void) | |
1da177e4 | 86 | { |
1da177e4 | 87 | unsigned long rsdp_phys; |
ad71860a | 88 | struct acpi_table_rsdp *rsdp; |
1da177e4 LT |
89 | struct acpi_table_xsdt *xsdt; |
90 | struct acpi_table_header *hdr; | |
62fdd767 FY |
91 | #ifdef CONFIG_DMAR |
92 | u64 i, nentries; | |
93 | #endif | |
1da177e4 LT |
94 | |
95 | rsdp_phys = acpi_find_rsdp(); | |
96 | if (!rsdp_phys) { | |
4be44fcd LB |
97 | printk(KERN_ERR |
98 | "ACPI 2.0 RSDP not found, default to \"dig\"\n"); | |
1da177e4 LT |
99 | return "dig"; |
100 | } | |
101 | ||
ad71860a AS |
102 | rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys); |
103 | if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) { | |
4be44fcd LB |
104 | printk(KERN_ERR |
105 | "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n"); | |
1da177e4 LT |
106 | return "dig"; |
107 | } | |
108 | ||
5f3b1a8b | 109 | xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address); |
1da177e4 | 110 | hdr = &xsdt->header; |
ad71860a | 111 | if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) { |
4be44fcd LB |
112 | printk(KERN_ERR |
113 | "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n"); | |
1da177e4 LT |
114 | return "dig"; |
115 | } | |
116 | ||
117 | if (!strcmp(hdr->oem_id, "HP")) { | |
118 | return "hpzx1"; | |
4be44fcd | 119 | } else if (!strcmp(hdr->oem_id, "SGI")) { |
22246614 JS |
120 | if (!strcmp(hdr->oem_table_id + 4, "UV")) |
121 | return "uv"; | |
122 | else | |
123 | return "sn2"; | |
a0df655c IY |
124 | } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) { |
125 | return "xen"; | |
1da177e4 LT |
126 | } |
127 | ||
62fdd767 FY |
128 | #ifdef CONFIG_DMAR |
129 | /* Look for Intel IOMMU */ | |
130 | nentries = (hdr->length - sizeof(*hdr)) / | |
131 | sizeof(xsdt->table_offset_entry[0]); | |
132 | for (i = 0; i < nentries; i++) { | |
133 | hdr = __va(xsdt->table_offset_entry[i]); | |
134 | if (strncmp(hdr->signature, ACPI_SIG_DMAR, | |
135 | sizeof(ACPI_SIG_DMAR) - 1) == 0) | |
136 | return "dig_vtd"; | |
137 | } | |
138 | #endif | |
139 | ||
1da177e4 | 140 | return "dig"; |
1da177e4 | 141 | } |
d868080d | 142 | #endif /* CONFIG_IA64_GENERIC */ |
1da177e4 LT |
143 | |
144 | #define ACPI_MAX_PLATFORM_INTERRUPTS 256 | |
145 | ||
146 | /* Array to record platform interrupt vectors for generic interrupt routing. */ | |
147 | int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = { | |
148 | [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1 | |
149 | }; | |
150 | ||
151 | enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC; | |
152 | ||
153 | /* | |
154 | * Interrupt routing API for device drivers. Provides interrupt vector for | |
155 | * a generic platform event. Currently only CPEI is implemented. | |
156 | */ | |
4be44fcd | 157 | int acpi_request_vector(u32 int_type) |
1da177e4 LT |
158 | { |
159 | int vector = -1; | |
160 | ||
161 | if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) { | |
162 | /* corrected platform error interrupt */ | |
163 | vector = platform_intr_list[int_type]; | |
164 | } else | |
4be44fcd LB |
165 | printk(KERN_ERR |
166 | "acpi_request_vector(): invalid interrupt type\n"); | |
1da177e4 LT |
167 | return vector; |
168 | } | |
169 | ||
2fdf0741 | 170 | char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size) |
1da177e4 LT |
171 | { |
172 | return __va(phys_addr); | |
173 | } | |
174 | ||
970ec1a8 | 175 | void __init __acpi_unmap_table(char *map, unsigned long size) |
7d97277b YL |
176 | { |
177 | } | |
178 | ||
1da177e4 LT |
179 | /* -------------------------------------------------------------------------- |
180 | Boot-time Table Parsing | |
181 | -------------------------------------------------------------------------- */ | |
182 | ||
4be44fcd LB |
183 | static int available_cpus __initdata; |
184 | struct acpi_table_madt *acpi_madt __initdata; | |
185 | static u8 has_8259; | |
1da177e4 LT |
186 | |
187 | static int __init | |
5f3b1a8b | 188 | acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, |
4be44fcd | 189 | const unsigned long end) |
1da177e4 | 190 | { |
5f3b1a8b | 191 | struct acpi_madt_local_apic_override *lapic; |
1da177e4 | 192 | |
5f3b1a8b | 193 | lapic = (struct acpi_madt_local_apic_override *)header; |
1da177e4 LT |
194 | |
195 | if (BAD_MADT_ENTRY(lapic, end)) | |
196 | return -EINVAL; | |
197 | ||
198 | if (lapic->address) { | |
199 | iounmap(ipi_base_addr); | |
200 | ipi_base_addr = ioremap(lapic->address, 0); | |
201 | } | |
202 | return 0; | |
203 | } | |
204 | ||
1da177e4 | 205 | static int __init |
5f3b1a8b | 206 | acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end) |
1da177e4 | 207 | { |
5f3b1a8b | 208 | struct acpi_madt_local_sapic *lsapic; |
1da177e4 | 209 | |
5f3b1a8b | 210 | lsapic = (struct acpi_madt_local_sapic *)header; |
1da177e4 | 211 | |
5f3b1a8b | 212 | /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */ |
1da177e4 | 213 | |
5f3b1a8b | 214 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { |
1da177e4 | 215 | #ifdef CONFIG_SMP |
4be44fcd LB |
216 | smp_boot_data.cpu_phys_id[available_cpus] = |
217 | (lsapic->id << 8) | lsapic->eid; | |
1da177e4 | 218 | #endif |
1da177e4 LT |
219 | ++available_cpus; |
220 | } | |
221 | ||
222 | total_cpus++; | |
223 | return 0; | |
224 | } | |
225 | ||
1da177e4 | 226 | static int __init |
5f3b1a8b | 227 | acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) |
1da177e4 | 228 | { |
5f3b1a8b | 229 | struct acpi_madt_local_apic_nmi *lacpi_nmi; |
1da177e4 | 230 | |
5f3b1a8b | 231 | lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header; |
1da177e4 LT |
232 | |
233 | if (BAD_MADT_ENTRY(lacpi_nmi, end)) | |
234 | return -EINVAL; | |
235 | ||
236 | /* TBD: Support lapic_nmi entries */ | |
237 | return 0; | |
238 | } | |
239 | ||
1da177e4 | 240 | static int __init |
5f3b1a8b | 241 | acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end) |
1da177e4 | 242 | { |
5f3b1a8b | 243 | struct acpi_madt_io_sapic *iosapic; |
1da177e4 | 244 | |
5f3b1a8b | 245 | iosapic = (struct acpi_madt_io_sapic *)header; |
1da177e4 LT |
246 | |
247 | if (BAD_MADT_ENTRY(iosapic, end)) | |
248 | return -EINVAL; | |
249 | ||
0e888adc | 250 | return iosapic_init(iosapic->address, iosapic->global_irq_base); |
1da177e4 LT |
251 | } |
252 | ||
5810452d LB |
253 | static unsigned int __initdata acpi_madt_rev; |
254 | ||
1da177e4 | 255 | static int __init |
5f3b1a8b | 256 | acpi_parse_plat_int_src(struct acpi_subtable_header * header, |
4be44fcd | 257 | const unsigned long end) |
1da177e4 | 258 | { |
5f3b1a8b | 259 | struct acpi_madt_interrupt_source *plintsrc; |
1da177e4 LT |
260 | int vector; |
261 | ||
5f3b1a8b | 262 | plintsrc = (struct acpi_madt_interrupt_source *)header; |
1da177e4 LT |
263 | |
264 | if (BAD_MADT_ENTRY(plintsrc, end)) | |
265 | return -EINVAL; | |
266 | ||
267 | /* | |
268 | * Get vector assignment for this interrupt, set attributes, | |
269 | * and program the IOSAPIC routing table. | |
270 | */ | |
271 | vector = iosapic_register_platform_intr(plintsrc->type, | |
272 | plintsrc->global_irq, | |
5f3b1a8b | 273 | plintsrc->io_sapic_vector, |
1da177e4 LT |
274 | plintsrc->eid, |
275 | plintsrc->id, | |
5f3b1a8b AS |
276 | ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) == |
277 | ACPI_MADT_POLARITY_ACTIVE_HIGH) ? | |
278 | IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, | |
279 | ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) == | |
280 | ACPI_MADT_TRIGGER_EDGE) ? | |
281 | IOSAPIC_EDGE : IOSAPIC_LEVEL); | |
1da177e4 LT |
282 | |
283 | platform_intr_list[plintsrc->type] = vector; | |
55e59c51 | 284 | if (acpi_madt_rev > 1) { |
5f3b1a8b | 285 | acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE; |
55e59c51 AR |
286 | } |
287 | ||
288 | /* | |
289 | * Save the physical id, so we can check when its being removed | |
290 | */ | |
291 | acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff; | |
292 | ||
1da177e4 LT |
293 | return 0; |
294 | } | |
295 | ||
b88e9265 | 296 | #ifdef CONFIG_HOTPLUG_CPU |
55e59c51 AR |
297 | unsigned int can_cpei_retarget(void) |
298 | { | |
299 | extern int cpe_vector; | |
ff741906 | 300 | extern unsigned int force_cpei_retarget; |
55e59c51 AR |
301 | |
302 | /* | |
303 | * Only if CPEI is supported and the override flag | |
304 | * is present, otherwise return that its re-targettable | |
305 | * if we are in polling mode. | |
306 | */ | |
ff741906 AR |
307 | if (cpe_vector > 0) { |
308 | if (acpi_cpei_override || force_cpei_retarget) | |
309 | return 1; | |
310 | else | |
311 | return 0; | |
312 | } | |
313 | return 1; | |
55e59c51 AR |
314 | } |
315 | ||
316 | unsigned int is_cpu_cpei_target(unsigned int cpu) | |
317 | { | |
318 | unsigned int logical_id; | |
319 | ||
320 | logical_id = cpu_logical_id(acpi_cpei_phys_cpuid); | |
321 | ||
322 | if (logical_id == cpu) | |
323 | return 1; | |
324 | else | |
325 | return 0; | |
326 | } | |
327 | ||
328 | void set_cpei_target_cpu(unsigned int cpu) | |
329 | { | |
330 | acpi_cpei_phys_cpuid = cpu_physical_id(cpu); | |
331 | } | |
b88e9265 | 332 | #endif |
55e59c51 AR |
333 | |
334 | unsigned int get_cpei_target_cpu(void) | |
335 | { | |
336 | return acpi_cpei_phys_cpuid; | |
337 | } | |
338 | ||
1da177e4 | 339 | static int __init |
5f3b1a8b | 340 | acpi_parse_int_src_ovr(struct acpi_subtable_header * header, |
4be44fcd | 341 | const unsigned long end) |
1da177e4 | 342 | { |
5f3b1a8b | 343 | struct acpi_madt_interrupt_override *p; |
1da177e4 | 344 | |
5f3b1a8b | 345 | p = (struct acpi_madt_interrupt_override *)header; |
1da177e4 LT |
346 | |
347 | if (BAD_MADT_ENTRY(p, end)) | |
348 | return -EINVAL; | |
349 | ||
5f3b1a8b AS |
350 | iosapic_override_isa_irq(p->source_irq, p->global_irq, |
351 | ((p->inti_flags & ACPI_MADT_POLARITY_MASK) == | |
352 | ACPI_MADT_POLARITY_ACTIVE_HIGH) ? | |
353 | IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, | |
354 | ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) == | |
355 | ACPI_MADT_TRIGGER_EDGE) ? | |
356 | IOSAPIC_EDGE : IOSAPIC_LEVEL); | |
1da177e4 LT |
357 | return 0; |
358 | } | |
359 | ||
1da177e4 | 360 | static int __init |
5f3b1a8b | 361 | acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) |
1da177e4 | 362 | { |
5f3b1a8b | 363 | struct acpi_madt_nmi_source *nmi_src; |
1da177e4 | 364 | |
5f3b1a8b | 365 | nmi_src = (struct acpi_madt_nmi_source *)header; |
1da177e4 LT |
366 | |
367 | if (BAD_MADT_ENTRY(nmi_src, end)) | |
368 | return -EINVAL; | |
369 | ||
370 | /* TBD: Support nimsrc entries */ | |
371 | return 0; | |
372 | } | |
373 | ||
4be44fcd | 374 | static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) |
1da177e4 | 375 | { |
4be44fcd | 376 | if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) { |
1da177e4 LT |
377 | |
378 | /* | |
379 | * Unfortunately ITC_DRIFT is not yet part of the | |
380 | * official SAL spec, so the ITC_DRIFT bit is not | |
381 | * set by the BIOS on this hardware. | |
382 | */ | |
383 | sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT; | |
384 | ||
385 | cyclone_setup(); | |
386 | } | |
387 | } | |
388 | ||
5f3b1a8b | 389 | static int __init acpi_parse_madt(struct acpi_table_header *table) |
1da177e4 | 390 | { |
5f3b1a8b | 391 | if (!table) |
1da177e4 LT |
392 | return -EINVAL; |
393 | ||
5f3b1a8b | 394 | acpi_madt = (struct acpi_table_madt *)table; |
1da177e4 | 395 | |
55e59c51 AR |
396 | acpi_madt_rev = acpi_madt->header.revision; |
397 | ||
1da177e4 LT |
398 | /* remember the value for reference after free_initmem() */ |
399 | #ifdef CONFIG_ITANIUM | |
4be44fcd | 400 | has_8259 = 1; /* Firmware on old Itanium systems is broken */ |
1da177e4 | 401 | #else |
5f3b1a8b | 402 | has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT; |
1da177e4 LT |
403 | #endif |
404 | iosapic_system_init(has_8259); | |
405 | ||
406 | /* Get base address of IPI Message Block */ | |
407 | ||
5f3b1a8b AS |
408 | if (acpi_madt->address) |
409 | ipi_base_addr = ioremap(acpi_madt->address, 0); | |
1da177e4 LT |
410 | |
411 | printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr); | |
412 | ||
413 | acpi_madt_oem_check(acpi_madt->header.oem_id, | |
4be44fcd | 414 | acpi_madt->header.oem_table_id); |
1da177e4 LT |
415 | |
416 | return 0; | |
417 | } | |
418 | ||
1da177e4 LT |
419 | #ifdef CONFIG_ACPI_NUMA |
420 | ||
421 | #undef SLIT_DEBUG | |
422 | ||
423 | #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32) | |
424 | ||
4be44fcd | 425 | static int __initdata srat_num_cpus; /* number of cpus */ |
1da177e4 LT |
426 | static u32 __devinitdata pxm_flag[PXM_FLAG_LEN]; |
427 | #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag)) | |
428 | #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag)) | |
1da177e4 | 429 | static struct acpi_table_slit __initdata *slit_table; |
2c6e6db4 | 430 | cpumask_t early_cpu_possible_map = CPU_MASK_NONE; |
1da177e4 | 431 | |
5f3b1a8b | 432 | static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa) |
3ad5ef8b JS |
433 | { |
434 | int pxm; | |
435 | ||
5f3b1a8b | 436 | pxm = pa->proximity_domain_lo; |
3ad5ef8b | 437 | if (ia64_platform_is("sn2")) |
5f3b1a8b | 438 | pxm += pa->proximity_domain_hi[0] << 8; |
3ad5ef8b JS |
439 | return pxm; |
440 | } | |
441 | ||
5f3b1a8b | 442 | static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma) |
3ad5ef8b JS |
443 | { |
444 | int pxm; | |
445 | ||
446 | pxm = ma->proximity_domain; | |
defad230 AS |
447 | if (!ia64_platform_is("sn2")) |
448 | pxm &= 0xff; | |
5f3b1a8b | 449 | |
3ad5ef8b JS |
450 | return pxm; |
451 | } | |
452 | ||
1da177e4 LT |
453 | /* |
454 | * ACPI 2.0 SLIT (System Locality Information Table) | |
455 | * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf | |
456 | */ | |
4be44fcd | 457 | void __init acpi_numa_slit_init(struct acpi_table_slit *slit) |
1da177e4 LT |
458 | { |
459 | u32 len; | |
460 | ||
461 | len = sizeof(struct acpi_table_header) + 8 | |
5f3b1a8b | 462 | + slit->locality_count * slit->locality_count; |
1da177e4 | 463 | if (slit->header.length != len) { |
4be44fcd LB |
464 | printk(KERN_ERR |
465 | "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n", | |
1da177e4 | 466 | len, slit->header.length); |
1da177e4 LT |
467 | return; |
468 | } | |
469 | slit_table = slit; | |
470 | } | |
471 | ||
472 | void __init | |
5f3b1a8b | 473 | acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) |
1da177e4 | 474 | { |
3ad5ef8b JS |
475 | int pxm; |
476 | ||
5f3b1a8b | 477 | if (!(pa->flags & ACPI_SRAT_CPU_ENABLED)) |
d903cea3 KK |
478 | return; |
479 | ||
3ad5ef8b JS |
480 | pxm = get_processor_proximity_domain(pa); |
481 | ||
1da177e4 | 482 | /* record this node in proximity bitmap */ |
3ad5ef8b | 483 | pxm_bit_set(pxm); |
1da177e4 | 484 | |
4be44fcd | 485 | node_cpuid[srat_num_cpus].phys_id = |
5f3b1a8b | 486 | (pa->apic_id << 8) | (pa->local_sapic_eid); |
1da177e4 | 487 | /* nid should be overridden as logical node id later */ |
3ad5ef8b | 488 | node_cpuid[srat_num_cpus].nid = pxm; |
2c6e6db4 | 489 | cpu_set(srat_num_cpus, early_cpu_possible_map); |
1da177e4 LT |
490 | srat_num_cpus++; |
491 | } | |
492 | ||
493 | void __init | |
5f3b1a8b | 494 | acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) |
1da177e4 LT |
495 | { |
496 | unsigned long paddr, size; | |
3ad5ef8b | 497 | int pxm; |
1da177e4 LT |
498 | struct node_memblk_s *p, *q, *pend; |
499 | ||
3ad5ef8b | 500 | pxm = get_memory_proximity_domain(ma); |
1da177e4 LT |
501 | |
502 | /* fill node memory chunk structure */ | |
5f3b1a8b AS |
503 | paddr = ma->base_address; |
504 | size = ma->length; | |
1da177e4 LT |
505 | |
506 | /* Ignore disabled entries */ | |
5f3b1a8b | 507 | if (!(ma->flags & ACPI_SRAT_MEM_ENABLED)) |
1da177e4 LT |
508 | return; |
509 | ||
510 | /* record this node in proximity bitmap */ | |
511 | pxm_bit_set(pxm); | |
512 | ||
513 | /* Insertion sort based on base address */ | |
514 | pend = &node_memblk[num_node_memblks]; | |
515 | for (p = &node_memblk[0]; p < pend; p++) { | |
516 | if (paddr < p->start_paddr) | |
517 | break; | |
518 | } | |
519 | if (p < pend) { | |
520 | for (q = pend - 1; q >= p; q--) | |
521 | *(q + 1) = *q; | |
522 | } | |
523 | p->start_paddr = paddr; | |
524 | p->size = size; | |
525 | p->nid = pxm; | |
526 | num_node_memblks++; | |
527 | } | |
528 | ||
4be44fcd | 529 | void __init acpi_numa_arch_fixup(void) |
1da177e4 LT |
530 | { |
531 | int i, j, node_from, node_to; | |
532 | ||
533 | /* If there's no SRAT, fix the phys_id and mark node 0 online */ | |
534 | if (srat_num_cpus == 0) { | |
535 | node_set_online(0); | |
536 | node_cpuid[0].phys_id = hard_smp_processor_id(); | |
537 | return; | |
538 | } | |
539 | ||
540 | /* | |
541 | * MCD - This can probably be dropped now. No need for pxm ID to node ID | |
542 | * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES. | |
543 | */ | |
1da177e4 LT |
544 | nodes_clear(node_online_map); |
545 | for (i = 0; i < MAX_PXM_DOMAINS; i++) { | |
546 | if (pxm_bit_test(i)) { | |
762834e8 | 547 | int nid = acpi_map_pxm_to_node(i); |
1da177e4 LT |
548 | node_set_online(nid); |
549 | } | |
550 | } | |
551 | ||
552 | /* set logical node id in memory chunk structure */ | |
553 | for (i = 0; i < num_node_memblks; i++) | |
762834e8 | 554 | node_memblk[i].nid = pxm_to_node(node_memblk[i].nid); |
1da177e4 LT |
555 | |
556 | /* assign memory bank numbers for each chunk on each node */ | |
557 | for_each_online_node(i) { | |
558 | int bank; | |
559 | ||
560 | bank = 0; | |
561 | for (j = 0; j < num_node_memblks; j++) | |
562 | if (node_memblk[j].nid == i) | |
563 | node_memblk[j].bank = bank++; | |
564 | } | |
565 | ||
566 | /* set logical node id in cpu structure */ | |
2c6e6db4 | 567 | for_each_possible_early_cpu(i) |
762834e8 | 568 | node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid); |
1da177e4 | 569 | |
4be44fcd LB |
570 | printk(KERN_INFO "Number of logical nodes in system = %d\n", |
571 | num_online_nodes()); | |
572 | printk(KERN_INFO "Number of memory chunks in system = %d\n", | |
573 | num_node_memblks); | |
1da177e4 | 574 | |
39b8931b FY |
575 | if (!slit_table) { |
576 | for (i = 0; i < MAX_NUMNODES; i++) | |
577 | for (j = 0; j < MAX_NUMNODES; j++) | |
578 | node_distance(i, j) = i == j ? LOCAL_DISTANCE : | |
579 | REMOTE_DISTANCE; | |
4be44fcd | 580 | return; |
39b8931b FY |
581 | } |
582 | ||
1da177e4 | 583 | memset(numa_slit, -1, sizeof(numa_slit)); |
5f3b1a8b | 584 | for (i = 0; i < slit_table->locality_count; i++) { |
1da177e4 LT |
585 | if (!pxm_bit_test(i)) |
586 | continue; | |
762834e8 | 587 | node_from = pxm_to_node(i); |
5f3b1a8b | 588 | for (j = 0; j < slit_table->locality_count; j++) { |
1da177e4 LT |
589 | if (!pxm_bit_test(j)) |
590 | continue; | |
762834e8 | 591 | node_to = pxm_to_node(j); |
1da177e4 | 592 | node_distance(node_from, node_to) = |
5f3b1a8b | 593 | slit_table->entry[i * slit_table->locality_count + j]; |
1da177e4 LT |
594 | } |
595 | } | |
596 | ||
597 | #ifdef SLIT_DEBUG | |
598 | printk("ACPI 2.0 SLIT locality table:\n"); | |
599 | for_each_online_node(i) { | |
600 | for_each_online_node(j) | |
4be44fcd | 601 | printk("%03d ", node_distance(i, j)); |
1da177e4 LT |
602 | printk("\n"); |
603 | } | |
604 | #endif | |
605 | } | |
4be44fcd | 606 | #endif /* CONFIG_ACPI_NUMA */ |
1da177e4 | 607 | |
1f3a6a15 KK |
608 | /* |
609 | * success: return IRQ number (>=0) | |
610 | * failure: return < 0 | |
611 | */ | |
a2f809b0 | 612 | int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity) |
1da177e4 | 613 | { |
3948ec94 JK |
614 | if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) |
615 | return gsi; | |
616 | ||
1da177e4 LT |
617 | if (has_8259 && gsi < 16) |
618 | return isa_irq_to_vector(gsi); | |
619 | ||
620 | return iosapic_register_intr(gsi, | |
cb654695 | 621 | (polarity == |
4be44fcd LB |
622 | ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : |
623 | IOSAPIC_POL_LOW, | |
cb654695 | 624 | (triggering == |
4be44fcd LB |
625 | ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : |
626 | IOSAPIC_LEVEL); | |
1da177e4 | 627 | } |
4be44fcd | 628 | |
4be44fcd | 629 | void acpi_unregister_gsi(u32 gsi) |
1da177e4 | 630 | { |
72253943 JK |
631 | if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) |
632 | return; | |
633 | ||
3fb2c74e PB |
634 | if (has_8259 && gsi < 16) |
635 | return; | |
636 | ||
1da177e4 LT |
637 | iosapic_unregister_intr(gsi); |
638 | } | |
4be44fcd | 639 | |
5f3b1a8b | 640 | static int __init acpi_parse_fadt(struct acpi_table_header *table) |
1da177e4 LT |
641 | { |
642 | struct acpi_table_header *fadt_header; | |
cee324b1 | 643 | struct acpi_table_fadt *fadt; |
1da177e4 | 644 | |
5f3b1a8b | 645 | if (!table) |
1da177e4 LT |
646 | return -EINVAL; |
647 | ||
5f3b1a8b | 648 | fadt_header = (struct acpi_table_header *)table; |
1da177e4 | 649 | if (fadt_header->revision != 3) |
4be44fcd | 650 | return -ENODEV; /* Only deal with ACPI 2.0 FADT */ |
1da177e4 | 651 | |
cee324b1 | 652 | fadt = (struct acpi_table_fadt *)fadt_header; |
1da177e4 | 653 | |
a2f809b0 YL |
654 | acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, |
655 | ACPI_ACTIVE_LOW); | |
1da177e4 LT |
656 | return 0; |
657 | } | |
658 | ||
62ee0540 DC |
659 | int __init early_acpi_boot_init(void) |
660 | { | |
661 | int ret; | |
662 | ||
663 | /* | |
664 | * do a partial walk of MADT to determine how many CPUs | |
665 | * we have including offline CPUs | |
666 | */ | |
667 | if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { | |
668 | printk(KERN_ERR PREFIX "Can't find MADT\n"); | |
669 | return 0; | |
670 | } | |
671 | ||
672 | ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, | |
673 | acpi_parse_lsapic, NR_CPUS); | |
674 | if (ret < 1) | |
675 | printk(KERN_ERR PREFIX | |
676 | "Error parsing MADT - no LAPIC entries\n"); | |
677 | ||
12cda817 TH |
678 | #ifdef CONFIG_SMP |
679 | if (available_cpus == 0) { | |
680 | printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n"); | |
681 | printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id()); | |
682 | smp_boot_data.cpu_phys_id[available_cpus] = | |
683 | hard_smp_processor_id(); | |
684 | available_cpus = 1; /* We've got at least one of these, no? */ | |
685 | } | |
686 | smp_boot_data.cpu_count = available_cpus; | |
687 | #endif | |
688 | /* Make boot-up look pretty */ | |
689 | printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, | |
690 | total_cpus); | |
691 | ||
62ee0540 DC |
692 | return 0; |
693 | } | |
694 | ||
4be44fcd | 695 | int __init acpi_boot_init(void) |
1da177e4 LT |
696 | { |
697 | ||
698 | /* | |
699 | * MADT | |
700 | * ---- | |
701 | * Parse the Multiple APIC Description Table (MADT), if exists. | |
702 | * Note that this table provides platform SMP configuration | |
703 | * information -- the successor to MPS tables. | |
704 | */ | |
705 | ||
db2d4ccd | 706 | if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { |
1da177e4 LT |
707 | printk(KERN_ERR PREFIX "Can't find MADT\n"); |
708 | goto skip_madt; | |
709 | } | |
710 | ||
711 | /* Local APIC */ | |
712 | ||
4be44fcd | 713 | if (acpi_table_parse_madt |
5f3b1a8b | 714 | (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0) |
4be44fcd LB |
715 | printk(KERN_ERR PREFIX |
716 | "Error parsing LAPIC address override entry\n"); | |
1da177e4 | 717 | |
5f3b1a8b | 718 | if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0) |
4be44fcd | 719 | < 0) |
1da177e4 LT |
720 | printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); |
721 | ||
722 | /* I/O APIC */ | |
723 | ||
4be44fcd | 724 | if (acpi_table_parse_madt |
7f6ff62a GB |
725 | (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) { |
726 | if (!ia64_platform_is("sn2")) | |
727 | printk(KERN_ERR PREFIX | |
728 | "Error parsing MADT - no IOSAPIC entries\n"); | |
729 | } | |
1da177e4 LT |
730 | |
731 | /* System-Level Interrupt Routing */ | |
732 | ||
4be44fcd | 733 | if (acpi_table_parse_madt |
5f3b1a8b | 734 | (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src, |
4be44fcd LB |
735 | ACPI_MAX_PLATFORM_INTERRUPTS) < 0) |
736 | printk(KERN_ERR PREFIX | |
737 | "Error parsing platform interrupt source entry\n"); | |
1da177e4 | 738 | |
4be44fcd | 739 | if (acpi_table_parse_madt |
5f3b1a8b | 740 | (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0) |
4be44fcd LB |
741 | printk(KERN_ERR PREFIX |
742 | "Error parsing interrupt source overrides entry\n"); | |
1da177e4 | 743 | |
5f3b1a8b | 744 | if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0) |
1da177e4 | 745 | printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); |
4be44fcd | 746 | skip_madt: |
1da177e4 LT |
747 | |
748 | /* | |
749 | * FADT says whether a legacy keyboard controller is present. | |
750 | * The FADT also contains an SCI_INT line, by which the system | |
751 | * gets interrupts such as power and sleep buttons. If it's not | |
752 | * on a Legacy interrupt, it needs to be setup. | |
753 | */ | |
db2d4ccd | 754 | if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt)) |
1da177e4 LT |
755 | printk(KERN_ERR PREFIX "Can't find FADT\n"); |
756 | ||
12cda817 | 757 | #ifdef CONFIG_ACPI_NUMA |
1da177e4 | 758 | #ifdef CONFIG_SMP |
1da177e4 LT |
759 | if (srat_num_cpus == 0) { |
760 | int cpu, i = 1; | |
761 | for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++) | |
4be44fcd LB |
762 | if (smp_boot_data.cpu_phys_id[cpu] != |
763 | hard_smp_processor_id()) | |
764 | node_cpuid[i++].phys_id = | |
765 | smp_boot_data.cpu_phys_id[cpu]; | |
1da177e4 | 766 | } |
8d7e3517 | 767 | #endif |
8d7e3517 | 768 | build_cpu_to_node_map(); |
1da177e4 | 769 | #endif |
1da177e4 LT |
770 | return 0; |
771 | } | |
772 | ||
4be44fcd | 773 | int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) |
1da177e4 | 774 | { |
3c3738c8 | 775 | int tmp; |
1da177e4 LT |
776 | |
777 | if (has_8259 && gsi < 16) | |
778 | *irq = isa_irq_to_vector(gsi); | |
779 | else { | |
3c3738c8 KK |
780 | tmp = gsi_to_irq(gsi); |
781 | if (tmp == -1) | |
1da177e4 | 782 | return -1; |
3c3738c8 | 783 | *irq = tmp; |
1da177e4 LT |
784 | } |
785 | return 0; | |
786 | } | |
787 | ||
788 | /* | |
789 | * ACPI based hotplug CPU support | |
790 | */ | |
791 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
792 | static | |
efc7508c | 793 | int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) |
1da177e4 LT |
794 | { |
795 | #ifdef CONFIG_ACPI_NUMA | |
4be44fcd | 796 | int pxm_id; |
08992986 | 797 | int nid; |
1da177e4 LT |
798 | |
799 | pxm_id = acpi_get_pxm(handle); | |
1da177e4 | 800 | /* |
08992986 KH |
801 | * We don't have cpu-only-node hotadd. But if the system equips |
802 | * SRAT table, pxm is already found and node is ready. | |
803 | * So, just pxm_to_nid(pxm) is OK. | |
804 | * This code here is for the system which doesn't have full SRAT | |
805 | * table for possible cpus. | |
1da177e4 | 806 | */ |
08992986 | 807 | nid = acpi_map_pxm_to_node(pxm_id); |
4be44fcd | 808 | node_cpuid[cpu].phys_id = physid; |
08992986 | 809 | node_cpuid[cpu].nid = nid; |
1da177e4 | 810 | #endif |
4be44fcd | 811 | return (0); |
1da177e4 LT |
812 | } |
813 | ||
a6b14fa6 AR |
814 | int additional_cpus __initdata = -1; |
815 | ||
816 | static __init int setup_additional_cpus(char *s) | |
817 | { | |
818 | if (s) | |
819 | additional_cpus = simple_strtol(s, NULL, 0); | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | early_param("additional_cpus", setup_additional_cpus); | |
825 | ||
826 | /* | |
72fdbdce | 827 | * cpu_possible_map should be static, it cannot change as CPUs |
a6b14fa6 AR |
828 | * are onlined, or offlined. The reason is per-cpu data-structures |
829 | * are allocated by some modules at init time, and dont expect to | |
830 | * do this dynamically on cpu arrival/departure. | |
831 | * cpu_present_map on the other hand can change dynamically. | |
832 | * In case when cpu_hotplug is not compiled, then we resort to current | |
833 | * behaviour, which is cpu_possible == cpu_present. | |
834 | * - Ashok Raj | |
835 | * | |
836 | * Three ways to find out the number of additional hotplug CPUs: | |
837 | * - If the BIOS specified disabled CPUs in ACPI/mptables use that. | |
838 | * - The user can overwrite it with additional_cpus=NUM | |
839 | * - Otherwise don't reserve additional CPUs. | |
840 | */ | |
841 | __init void prefill_possible_map(void) | |
842 | { | |
843 | int i; | |
844 | int possible, disabled_cpus; | |
845 | ||
846 | disabled_cpus = total_cpus - available_cpus; | |
8f8b1138 | 847 | |
a6b14fa6 | 848 | if (additional_cpus == -1) { |
8f8b1138 | 849 | if (disabled_cpus > 0) |
a6b14fa6 | 850 | additional_cpus = disabled_cpus; |
8f8b1138 | 851 | else |
a6b14fa6 | 852 | additional_cpus = 0; |
8f8b1138 AR |
853 | } |
854 | ||
855 | possible = available_cpus + additional_cpus; | |
856 | ||
2b633e3f YL |
857 | if (possible > nr_cpu_ids) |
858 | possible = nr_cpu_ids; | |
a6b14fa6 AR |
859 | |
860 | printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n", | |
8f8b1138 | 861 | possible, max((possible - available_cpus), 0)); |
a6b14fa6 AR |
862 | |
863 | for (i = 0; i < possible; i++) | |
2af51a3f | 864 | set_cpu_possible(i, true); |
a6b14fa6 AR |
865 | } |
866 | ||
4be44fcd | 867 | int acpi_map_lsapic(acpi_handle handle, int *pcpu) |
1da177e4 | 868 | { |
4be44fcd | 869 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 870 | union acpi_object *obj; |
5f3b1a8b | 871 | struct acpi_madt_local_sapic *lsapic; |
1da177e4 | 872 | cpumask_t tmp_map; |
efc7508c | 873 | int cpu, physid; |
4be44fcd | 874 | |
1da177e4 LT |
875 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) |
876 | return -EINVAL; | |
877 | ||
4be44fcd | 878 | if (!buffer.length || !buffer.pointer) |
1da177e4 | 879 | return -EINVAL; |
4be44fcd | 880 | |
1da177e4 | 881 | obj = buffer.pointer; |
5f3b1a8b AS |
882 | if (obj->type != ACPI_TYPE_BUFFER) |
883 | { | |
02438d87 | 884 | kfree(buffer.pointer); |
1da177e4 LT |
885 | return -EINVAL; |
886 | } | |
887 | ||
5f3b1a8b | 888 | lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer; |
1da177e4 | 889 | |
5f3b1a8b | 890 | if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) || |
965d7472 | 891 | (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) { |
02438d87 | 892 | kfree(buffer.pointer); |
1da177e4 LT |
893 | return -EINVAL; |
894 | } | |
895 | ||
4be44fcd | 896 | physid = ((lsapic->id << 8) | (lsapic->eid)); |
1da177e4 | 897 | |
02438d87 | 898 | kfree(buffer.pointer); |
1da177e4 LT |
899 | buffer.length = ACPI_ALLOCATE_BUFFER; |
900 | buffer.pointer = NULL; | |
901 | ||
5dd3c994 RR |
902 | cpumask_complement(&tmp_map, cpu_present_mask); |
903 | cpu = cpumask_first(&tmp_map); | |
904 | if (cpu >= nr_cpu_ids) | |
1da177e4 LT |
905 | return -EINVAL; |
906 | ||
907 | acpi_map_cpu2node(handle, cpu, physid); | |
908 | ||
4be44fcd | 909 | cpu_set(cpu, cpu_present_map); |
1da177e4 | 910 | ia64_cpu_to_sapicid[cpu] = physid; |
1da177e4 | 911 | |
d8191fa4 AC |
912 | acpi_processor_set_pdc(handle); |
913 | ||
1da177e4 | 914 | *pcpu = cpu; |
4be44fcd | 915 | return (0); |
1da177e4 | 916 | } |
1da177e4 | 917 | |
4be44fcd | 918 | EXPORT_SYMBOL(acpi_map_lsapic); |
1da177e4 | 919 | |
4be44fcd | 920 | int acpi_unmap_lsapic(int cpu) |
1da177e4 | 921 | { |
1da177e4 | 922 | ia64_cpu_to_sapicid[cpu] = -1; |
4be44fcd | 923 | cpu_clear(cpu, cpu_present_map); |
1da177e4 LT |
924 | |
925 | #ifdef CONFIG_ACPI_NUMA | |
926 | /* NUMA specific cleanup's */ | |
927 | #endif | |
928 | ||
4be44fcd | 929 | return (0); |
1da177e4 | 930 | } |
4be44fcd | 931 | |
1da177e4 | 932 | EXPORT_SYMBOL(acpi_unmap_lsapic); |
4be44fcd | 933 | #endif /* CONFIG_ACPI_HOTPLUG_CPU */ |
1da177e4 LT |
934 | |
935 | #ifdef CONFIG_ACPI_NUMA | |
650316f1 | 936 | static acpi_status __devinit |
4be44fcd | 937 | acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret) |
1da177e4 | 938 | { |
4be44fcd | 939 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 940 | union acpi_object *obj; |
5f3b1a8b | 941 | struct acpi_madt_io_sapic *iosapic; |
1da177e4 | 942 | unsigned int gsi_base; |
bb0fc085 | 943 | int pxm, node; |
1da177e4 LT |
944 | |
945 | /* Only care about objects w/ a method that returns the MADT */ | |
946 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
947 | return AE_OK; | |
948 | ||
949 | if (!buffer.length || !buffer.pointer) | |
950 | return AE_OK; | |
951 | ||
952 | obj = buffer.pointer; | |
953 | if (obj->type != ACPI_TYPE_BUFFER || | |
954 | obj->buffer.length < sizeof(*iosapic)) { | |
02438d87 | 955 | kfree(buffer.pointer); |
1da177e4 LT |
956 | return AE_OK; |
957 | } | |
958 | ||
5f3b1a8b | 959 | iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer; |
1da177e4 | 960 | |
5f3b1a8b | 961 | if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) { |
02438d87 | 962 | kfree(buffer.pointer); |
1da177e4 LT |
963 | return AE_OK; |
964 | } | |
965 | ||
966 | gsi_base = iosapic->global_irq_base; | |
967 | ||
02438d87 | 968 | kfree(buffer.pointer); |
1da177e4 LT |
969 | |
970 | /* | |
bb0fc085 | 971 | * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell |
1da177e4 LT |
972 | * us which node to associate this with. |
973 | */ | |
bb0fc085 AW |
974 | pxm = acpi_get_pxm(handle); |
975 | if (pxm < 0) | |
1da177e4 | 976 | return AE_OK; |
1da177e4 | 977 | |
762834e8 | 978 | node = pxm_to_node(pxm); |
1da177e4 LT |
979 | |
980 | if (node >= MAX_NUMNODES || !node_online(node) || | |
fbb776c3 | 981 | cpumask_empty(cpumask_of_node(node))) |
1da177e4 LT |
982 | return AE_OK; |
983 | ||
984 | /* We know a gsi to node mapping! */ | |
985 | map_iosapic_to_node(gsi_base, node); | |
986 | return AE_OK; | |
987 | } | |
650316f1 BH |
988 | |
989 | static int __init | |
990 | acpi_map_iosapics (void) | |
991 | { | |
992 | acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL); | |
993 | return 0; | |
994 | } | |
995 | ||
996 | fs_initcall(acpi_map_iosapics); | |
997 | #endif /* CONFIG_ACPI_NUMA */ | |
b1bb248a | 998 | |
c5b5a599 | 999 | int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) |
b1bb248a | 1000 | { |
0e888adc KK |
1001 | int err; |
1002 | ||
1003 | if ((err = iosapic_init(phys_addr, gsi_base))) | |
1004 | return err; | |
1005 | ||
24b8e0cc | 1006 | #ifdef CONFIG_ACPI_NUMA |
0e888adc | 1007 | acpi_map_iosapic(handle, 0, NULL, NULL); |
4be44fcd | 1008 | #endif /* CONFIG_ACPI_NUMA */ |
0e888adc KK |
1009 | |
1010 | return 0; | |
b1bb248a | 1011 | } |
4be44fcd | 1012 | |
b1bb248a KK |
1013 | EXPORT_SYMBOL(acpi_register_ioapic); |
1014 | ||
4be44fcd | 1015 | int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) |
b1bb248a | 1016 | { |
0e888adc | 1017 | return iosapic_remove(gsi_base); |
b1bb248a | 1018 | } |
4be44fcd | 1019 | |
b1bb248a KK |
1020 | EXPORT_SYMBOL(acpi_unregister_ioapic); |
1021 | ||
e8b2fd01 LB |
1022 | /* |
1023 | * acpi_save_state_mem() - save kernel state | |
1024 | * | |
1025 | * TBD when when IA64 starts to support suspend... | |
1026 | */ | |
1027 | int acpi_save_state_mem(void) { return 0; } | |
1028 | ||
1029 | /* | |
1030 | * acpi_restore_state() | |
1031 | */ | |
1032 | void acpi_restore_state_mem(void) {} | |
1033 | ||
1034 | /* | |
1035 | * do_suspend_lowlevel() | |
1036 | */ | |
1037 | void do_suspend_lowlevel(void) {} |