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