]>
Commit | Line | Data |
---|---|---|
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> | |
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 | ||
56 | #define BAD_MADT_ENTRY(entry, end) ( \ | |
57 | (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ | |
df6fd319 | 58 | ((acpi_table_entry_header *)entry)->length < sizeof(*entry)) |
1da177e4 LT |
59 | |
60 | #define PREFIX "ACPI: " | |
61 | ||
62 | void (*pm_idle) (void); | |
63 | EXPORT_SYMBOL(pm_idle); | |
64 | void (*pm_power_off) (void); | |
65 | EXPORT_SYMBOL(pm_power_off); | |
66 | ||
55e59c51 AR |
67 | unsigned int acpi_cpei_override; |
68 | unsigned int acpi_cpei_phys_cpuid; | |
69 | ||
1da177e4 | 70 | #define MAX_SAPICS 256 |
702c7e76 | 71 | u16 ia64_acpiid_to_sapicid[MAX_SAPICS] = {[0 ... MAX_SAPICS - 1] = -1 }; |
4be44fcd | 72 | |
1da177e4 LT |
73 | EXPORT_SYMBOL(ia64_acpiid_to_sapicid); |
74 | ||
4be44fcd | 75 | const char *acpi_get_sysname(void) |
1da177e4 LT |
76 | { |
77 | #ifdef CONFIG_IA64_GENERIC | |
78 | unsigned long rsdp_phys; | |
79 | struct acpi20_table_rsdp *rsdp; | |
80 | struct acpi_table_xsdt *xsdt; | |
81 | struct acpi_table_header *hdr; | |
82 | ||
83 | rsdp_phys = acpi_find_rsdp(); | |
84 | if (!rsdp_phys) { | |
4be44fcd LB |
85 | printk(KERN_ERR |
86 | "ACPI 2.0 RSDP not found, default to \"dig\"\n"); | |
1da177e4 LT |
87 | return "dig"; |
88 | } | |
89 | ||
4be44fcd | 90 | rsdp = (struct acpi20_table_rsdp *)__va(rsdp_phys); |
1da177e4 | 91 | if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) { |
4be44fcd LB |
92 | printk(KERN_ERR |
93 | "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n"); | |
1da177e4 LT |
94 | return "dig"; |
95 | } | |
96 | ||
4be44fcd | 97 | xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_address); |
1da177e4 LT |
98 | hdr = &xsdt->header; |
99 | if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) { | |
4be44fcd LB |
100 | printk(KERN_ERR |
101 | "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n"); | |
1da177e4 LT |
102 | return "dig"; |
103 | } | |
104 | ||
105 | if (!strcmp(hdr->oem_id, "HP")) { | |
106 | return "hpzx1"; | |
4be44fcd | 107 | } else if (!strcmp(hdr->oem_id, "SGI")) { |
1da177e4 LT |
108 | return "sn2"; |
109 | } | |
110 | ||
111 | return "dig"; | |
112 | #else | |
113 | # if defined (CONFIG_IA64_HP_SIM) | |
114 | return "hpsim"; | |
115 | # elif defined (CONFIG_IA64_HP_ZX1) | |
116 | return "hpzx1"; | |
117 | # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB) | |
118 | return "hpzx1_swiotlb"; | |
119 | # elif defined (CONFIG_IA64_SGI_SN2) | |
120 | return "sn2"; | |
121 | # elif defined (CONFIG_IA64_DIG) | |
122 | return "dig"; | |
123 | # else | |
124 | # error Unknown platform. Fix acpi.c. | |
125 | # endif | |
126 | #endif | |
127 | } | |
128 | ||
888ba6c6 | 129 | #ifdef CONFIG_ACPI |
1da177e4 LT |
130 | |
131 | #define ACPI_MAX_PLATFORM_INTERRUPTS 256 | |
132 | ||
133 | /* Array to record platform interrupt vectors for generic interrupt routing. */ | |
134 | int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = { | |
135 | [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1 | |
136 | }; | |
137 | ||
138 | enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC; | |
139 | ||
140 | /* | |
141 | * Interrupt routing API for device drivers. Provides interrupt vector for | |
142 | * a generic platform event. Currently only CPEI is implemented. | |
143 | */ | |
4be44fcd | 144 | int acpi_request_vector(u32 int_type) |
1da177e4 LT |
145 | { |
146 | int vector = -1; | |
147 | ||
148 | if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) { | |
149 | /* corrected platform error interrupt */ | |
150 | vector = platform_intr_list[int_type]; | |
151 | } else | |
4be44fcd LB |
152 | printk(KERN_ERR |
153 | "acpi_request_vector(): invalid interrupt type\n"); | |
1da177e4 LT |
154 | return vector; |
155 | } | |
156 | ||
4be44fcd | 157 | char *__acpi_map_table(unsigned long phys_addr, unsigned long size) |
1da177e4 LT |
158 | { |
159 | return __va(phys_addr); | |
160 | } | |
161 | ||
162 | /* -------------------------------------------------------------------------- | |
163 | Boot-time Table Parsing | |
164 | -------------------------------------------------------------------------- */ | |
165 | ||
4be44fcd LB |
166 | static int total_cpus __initdata; |
167 | static int available_cpus __initdata; | |
168 | struct acpi_table_madt *acpi_madt __initdata; | |
169 | static u8 has_8259; | |
1da177e4 LT |
170 | |
171 | static int __init | |
4be44fcd LB |
172 | acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header, |
173 | const unsigned long end) | |
1da177e4 LT |
174 | { |
175 | struct acpi_table_lapic_addr_ovr *lapic; | |
176 | ||
4be44fcd | 177 | lapic = (struct acpi_table_lapic_addr_ovr *)header; |
1da177e4 LT |
178 | |
179 | if (BAD_MADT_ENTRY(lapic, end)) | |
180 | return -EINVAL; | |
181 | ||
182 | if (lapic->address) { | |
183 | iounmap(ipi_base_addr); | |
184 | ipi_base_addr = ioremap(lapic->address, 0); | |
185 | } | |
186 | return 0; | |
187 | } | |
188 | ||
1da177e4 | 189 | static int __init |
4be44fcd | 190 | acpi_parse_lsapic(acpi_table_entry_header * header, const unsigned long end) |
1da177e4 LT |
191 | { |
192 | struct acpi_table_lsapic *lsapic; | |
193 | ||
4be44fcd | 194 | lsapic = (struct acpi_table_lsapic *)header; |
1da177e4 LT |
195 | |
196 | if (BAD_MADT_ENTRY(lsapic, end)) | |
197 | return -EINVAL; | |
198 | ||
199 | if (lsapic->flags.enabled) { | |
200 | #ifdef CONFIG_SMP | |
4be44fcd LB |
201 | smp_boot_data.cpu_phys_id[available_cpus] = |
202 | (lsapic->id << 8) | lsapic->eid; | |
1da177e4 | 203 | #endif |
4be44fcd LB |
204 | ia64_acpiid_to_sapicid[lsapic->acpi_id] = |
205 | (lsapic->id << 8) | lsapic->eid; | |
1da177e4 LT |
206 | ++available_cpus; |
207 | } | |
208 | ||
209 | total_cpus++; | |
210 | return 0; | |
211 | } | |
212 | ||
1da177e4 | 213 | static int __init |
4be44fcd | 214 | acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end) |
1da177e4 LT |
215 | { |
216 | struct acpi_table_lapic_nmi *lacpi_nmi; | |
217 | ||
4be44fcd | 218 | lacpi_nmi = (struct acpi_table_lapic_nmi *)header; |
1da177e4 LT |
219 | |
220 | if (BAD_MADT_ENTRY(lacpi_nmi, end)) | |
221 | return -EINVAL; | |
222 | ||
223 | /* TBD: Support lapic_nmi entries */ | |
224 | return 0; | |
225 | } | |
226 | ||
1da177e4 | 227 | static int __init |
4be44fcd | 228 | acpi_parse_iosapic(acpi_table_entry_header * header, const unsigned long end) |
1da177e4 LT |
229 | { |
230 | struct acpi_table_iosapic *iosapic; | |
231 | ||
4be44fcd | 232 | iosapic = (struct acpi_table_iosapic *)header; |
1da177e4 LT |
233 | |
234 | if (BAD_MADT_ENTRY(iosapic, end)) | |
235 | return -EINVAL; | |
236 | ||
0e888adc | 237 | return iosapic_init(iosapic->address, iosapic->global_irq_base); |
1da177e4 LT |
238 | } |
239 | ||
5810452d LB |
240 | static unsigned int __initdata acpi_madt_rev; |
241 | ||
1da177e4 | 242 | static int __init |
4be44fcd LB |
243 | acpi_parse_plat_int_src(acpi_table_entry_header * header, |
244 | const unsigned long end) | |
1da177e4 LT |
245 | { |
246 | struct acpi_table_plat_int_src *plintsrc; | |
247 | int vector; | |
248 | ||
4be44fcd | 249 | plintsrc = (struct acpi_table_plat_int_src *)header; |
1da177e4 LT |
250 | |
251 | if (BAD_MADT_ENTRY(plintsrc, end)) | |
252 | return -EINVAL; | |
253 | ||
254 | /* | |
255 | * Get vector assignment for this interrupt, set attributes, | |
256 | * and program the IOSAPIC routing table. | |
257 | */ | |
258 | vector = iosapic_register_platform_intr(plintsrc->type, | |
259 | plintsrc->global_irq, | |
260 | plintsrc->iosapic_vector, | |
261 | plintsrc->eid, | |
262 | plintsrc->id, | |
4be44fcd LB |
263 | (plintsrc->flags.polarity == |
264 | 1) ? IOSAPIC_POL_HIGH : | |
265 | IOSAPIC_POL_LOW, | |
266 | (plintsrc->flags.trigger == | |
267 | 1) ? IOSAPIC_EDGE : | |
268 | IOSAPIC_LEVEL); | |
1da177e4 LT |
269 | |
270 | platform_intr_list[plintsrc->type] = vector; | |
55e59c51 AR |
271 | if (acpi_madt_rev > 1) { |
272 | acpi_cpei_override = plintsrc->plint_flags.cpei_override_flag; | |
273 | } | |
274 | ||
275 | /* | |
276 | * Save the physical id, so we can check when its being removed | |
277 | */ | |
278 | acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff; | |
279 | ||
1da177e4 LT |
280 | return 0; |
281 | } | |
282 | ||
b88e9265 | 283 | #ifdef CONFIG_HOTPLUG_CPU |
55e59c51 AR |
284 | unsigned int can_cpei_retarget(void) |
285 | { | |
286 | extern int cpe_vector; | |
ff741906 | 287 | extern unsigned int force_cpei_retarget; |
55e59c51 AR |
288 | |
289 | /* | |
290 | * Only if CPEI is supported and the override flag | |
291 | * is present, otherwise return that its re-targettable | |
292 | * if we are in polling mode. | |
293 | */ | |
ff741906 AR |
294 | if (cpe_vector > 0) { |
295 | if (acpi_cpei_override || force_cpei_retarget) | |
296 | return 1; | |
297 | else | |
298 | return 0; | |
299 | } | |
300 | return 1; | |
55e59c51 AR |
301 | } |
302 | ||
303 | unsigned int is_cpu_cpei_target(unsigned int cpu) | |
304 | { | |
305 | unsigned int logical_id; | |
306 | ||
307 | logical_id = cpu_logical_id(acpi_cpei_phys_cpuid); | |
308 | ||
309 | if (logical_id == cpu) | |
310 | return 1; | |
311 | else | |
312 | return 0; | |
313 | } | |
314 | ||
315 | void set_cpei_target_cpu(unsigned int cpu) | |
316 | { | |
317 | acpi_cpei_phys_cpuid = cpu_physical_id(cpu); | |
318 | } | |
b88e9265 | 319 | #endif |
55e59c51 AR |
320 | |
321 | unsigned int get_cpei_target_cpu(void) | |
322 | { | |
323 | return acpi_cpei_phys_cpuid; | |
324 | } | |
325 | ||
1da177e4 | 326 | static int __init |
4be44fcd LB |
327 | acpi_parse_int_src_ovr(acpi_table_entry_header * header, |
328 | const unsigned long end) | |
1da177e4 LT |
329 | { |
330 | struct acpi_table_int_src_ovr *p; | |
331 | ||
4be44fcd | 332 | p = (struct acpi_table_int_src_ovr *)header; |
1da177e4 LT |
333 | |
334 | if (BAD_MADT_ENTRY(p, end)) | |
335 | return -EINVAL; | |
336 | ||
337 | iosapic_override_isa_irq(p->bus_irq, p->global_irq, | |
4be44fcd LB |
338 | (p->flags.polarity == |
339 | 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, | |
340 | (p->flags.trigger == | |
341 | 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL); | |
1da177e4 LT |
342 | return 0; |
343 | } | |
344 | ||
1da177e4 | 345 | static int __init |
4be44fcd | 346 | acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end) |
1da177e4 LT |
347 | { |
348 | struct acpi_table_nmi_src *nmi_src; | |
349 | ||
4be44fcd | 350 | nmi_src = (struct acpi_table_nmi_src *)header; |
1da177e4 LT |
351 | |
352 | if (BAD_MADT_ENTRY(nmi_src, end)) | |
353 | return -EINVAL; | |
354 | ||
355 | /* TBD: Support nimsrc entries */ | |
356 | return 0; | |
357 | } | |
358 | ||
4be44fcd | 359 | static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) |
1da177e4 | 360 | { |
4be44fcd | 361 | if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) { |
1da177e4 LT |
362 | |
363 | /* | |
364 | * Unfortunately ITC_DRIFT is not yet part of the | |
365 | * official SAL spec, so the ITC_DRIFT bit is not | |
366 | * set by the BIOS on this hardware. | |
367 | */ | |
368 | sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT; | |
369 | ||
370 | cyclone_setup(); | |
371 | } | |
372 | } | |
373 | ||
4be44fcd | 374 | static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size) |
1da177e4 LT |
375 | { |
376 | if (!phys_addr || !size) | |
377 | return -EINVAL; | |
378 | ||
4be44fcd | 379 | acpi_madt = (struct acpi_table_madt *)__va(phys_addr); |
1da177e4 | 380 | |
55e59c51 AR |
381 | acpi_madt_rev = acpi_madt->header.revision; |
382 | ||
1da177e4 LT |
383 | /* remember the value for reference after free_initmem() */ |
384 | #ifdef CONFIG_ITANIUM | |
4be44fcd | 385 | has_8259 = 1; /* Firmware on old Itanium systems is broken */ |
1da177e4 LT |
386 | #else |
387 | has_8259 = acpi_madt->flags.pcat_compat; | |
388 | #endif | |
389 | iosapic_system_init(has_8259); | |
390 | ||
391 | /* Get base address of IPI Message Block */ | |
392 | ||
393 | if (acpi_madt->lapic_address) | |
394 | ipi_base_addr = ioremap(acpi_madt->lapic_address, 0); | |
395 | ||
396 | printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr); | |
397 | ||
398 | acpi_madt_oem_check(acpi_madt->header.oem_id, | |
4be44fcd | 399 | acpi_madt->header.oem_table_id); |
1da177e4 LT |
400 | |
401 | return 0; | |
402 | } | |
403 | ||
1da177e4 LT |
404 | #ifdef CONFIG_ACPI_NUMA |
405 | ||
406 | #undef SLIT_DEBUG | |
407 | ||
408 | #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32) | |
409 | ||
4be44fcd | 410 | static int __initdata srat_num_cpus; /* number of cpus */ |
1da177e4 LT |
411 | static u32 __devinitdata pxm_flag[PXM_FLAG_LEN]; |
412 | #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag)) | |
413 | #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag)) | |
1da177e4 LT |
414 | static struct acpi_table_slit __initdata *slit_table; |
415 | ||
3ad5ef8b JS |
416 | static int get_processor_proximity_domain(struct acpi_table_processor_affinity *pa) |
417 | { | |
418 | int pxm; | |
419 | ||
420 | pxm = pa->proximity_domain; | |
421 | if (ia64_platform_is("sn2")) | |
422 | pxm += pa->reserved[0] << 8; | |
423 | return pxm; | |
424 | } | |
425 | ||
426 | static int get_memory_proximity_domain(struct acpi_table_memory_affinity *ma) | |
427 | { | |
428 | int pxm; | |
429 | ||
430 | pxm = ma->proximity_domain; | |
431 | if (ia64_platform_is("sn2")) | |
432 | pxm += ma->reserved1[0] << 8; | |
433 | return pxm; | |
434 | } | |
435 | ||
1da177e4 LT |
436 | /* |
437 | * ACPI 2.0 SLIT (System Locality Information Table) | |
438 | * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf | |
439 | */ | |
4be44fcd | 440 | void __init acpi_numa_slit_init(struct acpi_table_slit *slit) |
1da177e4 LT |
441 | { |
442 | u32 len; | |
443 | ||
444 | len = sizeof(struct acpi_table_header) + 8 | |
4be44fcd | 445 | + slit->localities * slit->localities; |
1da177e4 | 446 | if (slit->header.length != len) { |
4be44fcd LB |
447 | printk(KERN_ERR |
448 | "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n", | |
1da177e4 LT |
449 | len, slit->header.length); |
450 | memset(numa_slit, 10, sizeof(numa_slit)); | |
451 | return; | |
452 | } | |
453 | slit_table = slit; | |
454 | } | |
455 | ||
456 | void __init | |
4be44fcd | 457 | acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity *pa) |
1da177e4 | 458 | { |
3ad5ef8b JS |
459 | int pxm; |
460 | ||
d903cea3 KK |
461 | if (!pa->flags.enabled) |
462 | return; | |
463 | ||
3ad5ef8b JS |
464 | pxm = get_processor_proximity_domain(pa); |
465 | ||
1da177e4 | 466 | /* record this node in proximity bitmap */ |
3ad5ef8b | 467 | pxm_bit_set(pxm); |
1da177e4 | 468 | |
4be44fcd LB |
469 | node_cpuid[srat_num_cpus].phys_id = |
470 | (pa->apic_id << 8) | (pa->lsapic_eid); | |
1da177e4 | 471 | /* nid should be overridden as logical node id later */ |
3ad5ef8b | 472 | node_cpuid[srat_num_cpus].nid = pxm; |
1da177e4 LT |
473 | srat_num_cpus++; |
474 | } | |
475 | ||
476 | void __init | |
4be44fcd | 477 | acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma) |
1da177e4 LT |
478 | { |
479 | unsigned long paddr, size; | |
3ad5ef8b | 480 | int pxm; |
1da177e4 LT |
481 | struct node_memblk_s *p, *q, *pend; |
482 | ||
3ad5ef8b | 483 | pxm = get_memory_proximity_domain(ma); |
1da177e4 LT |
484 | |
485 | /* fill node memory chunk structure */ | |
486 | paddr = ma->base_addr_hi; | |
487 | paddr = (paddr << 32) | ma->base_addr_lo; | |
488 | size = ma->length_hi; | |
489 | size = (size << 32) | ma->length_lo; | |
490 | ||
491 | /* Ignore disabled entries */ | |
492 | if (!ma->flags.enabled) | |
493 | return; | |
494 | ||
495 | /* record this node in proximity bitmap */ | |
496 | pxm_bit_set(pxm); | |
497 | ||
498 | /* Insertion sort based on base address */ | |
499 | pend = &node_memblk[num_node_memblks]; | |
500 | for (p = &node_memblk[0]; p < pend; p++) { | |
501 | if (paddr < p->start_paddr) | |
502 | break; | |
503 | } | |
504 | if (p < pend) { | |
505 | for (q = pend - 1; q >= p; q--) | |
506 | *(q + 1) = *q; | |
507 | } | |
508 | p->start_paddr = paddr; | |
509 | p->size = size; | |
510 | p->nid = pxm; | |
511 | num_node_memblks++; | |
512 | } | |
513 | ||
4be44fcd | 514 | void __init acpi_numa_arch_fixup(void) |
1da177e4 LT |
515 | { |
516 | int i, j, node_from, node_to; | |
517 | ||
518 | /* If there's no SRAT, fix the phys_id and mark node 0 online */ | |
519 | if (srat_num_cpus == 0) { | |
520 | node_set_online(0); | |
521 | node_cpuid[0].phys_id = hard_smp_processor_id(); | |
522 | return; | |
523 | } | |
524 | ||
525 | /* | |
526 | * MCD - This can probably be dropped now. No need for pxm ID to node ID | |
527 | * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES. | |
528 | */ | |
1da177e4 LT |
529 | nodes_clear(node_online_map); |
530 | for (i = 0; i < MAX_PXM_DOMAINS; i++) { | |
531 | if (pxm_bit_test(i)) { | |
762834e8 | 532 | int nid = acpi_map_pxm_to_node(i); |
1da177e4 LT |
533 | node_set_online(nid); |
534 | } | |
535 | } | |
536 | ||
537 | /* set logical node id in memory chunk structure */ | |
538 | for (i = 0; i < num_node_memblks; i++) | |
762834e8 | 539 | node_memblk[i].nid = pxm_to_node(node_memblk[i].nid); |
1da177e4 LT |
540 | |
541 | /* assign memory bank numbers for each chunk on each node */ | |
542 | for_each_online_node(i) { | |
543 | int bank; | |
544 | ||
545 | bank = 0; | |
546 | for (j = 0; j < num_node_memblks; j++) | |
547 | if (node_memblk[j].nid == i) | |
548 | node_memblk[j].bank = bank++; | |
549 | } | |
550 | ||
551 | /* set logical node id in cpu structure */ | |
552 | for (i = 0; i < srat_num_cpus; i++) | |
762834e8 | 553 | node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid); |
1da177e4 | 554 | |
4be44fcd LB |
555 | printk(KERN_INFO "Number of logical nodes in system = %d\n", |
556 | num_online_nodes()); | |
557 | printk(KERN_INFO "Number of memory chunks in system = %d\n", | |
558 | num_node_memblks); | |
1da177e4 | 559 | |
4be44fcd LB |
560 | if (!slit_table) |
561 | return; | |
1da177e4 | 562 | memset(numa_slit, -1, sizeof(numa_slit)); |
4be44fcd | 563 | for (i = 0; i < slit_table->localities; i++) { |
1da177e4 LT |
564 | if (!pxm_bit_test(i)) |
565 | continue; | |
762834e8 | 566 | node_from = pxm_to_node(i); |
4be44fcd | 567 | for (j = 0; j < slit_table->localities; j++) { |
1da177e4 LT |
568 | if (!pxm_bit_test(j)) |
569 | continue; | |
762834e8 | 570 | node_to = pxm_to_node(j); |
1da177e4 | 571 | node_distance(node_from, node_to) = |
4be44fcd | 572 | slit_table->entry[i * slit_table->localities + j]; |
1da177e4 LT |
573 | } |
574 | } | |
575 | ||
576 | #ifdef SLIT_DEBUG | |
577 | printk("ACPI 2.0 SLIT locality table:\n"); | |
578 | for_each_online_node(i) { | |
579 | for_each_online_node(j) | |
4be44fcd | 580 | printk("%03d ", node_distance(i, j)); |
1da177e4 LT |
581 | printk("\n"); |
582 | } | |
583 | #endif | |
584 | } | |
4be44fcd | 585 | #endif /* CONFIG_ACPI_NUMA */ |
1da177e4 | 586 | |
1f3a6a15 KK |
587 | /* |
588 | * success: return IRQ number (>=0) | |
589 | * failure: return < 0 | |
590 | */ | |
cb654695 | 591 | int acpi_register_gsi(u32 gsi, int triggering, int polarity) |
1da177e4 | 592 | { |
3948ec94 JK |
593 | if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) |
594 | return gsi; | |
595 | ||
1da177e4 LT |
596 | if (has_8259 && gsi < 16) |
597 | return isa_irq_to_vector(gsi); | |
598 | ||
599 | return iosapic_register_intr(gsi, | |
cb654695 | 600 | (polarity == |
4be44fcd LB |
601 | ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : |
602 | IOSAPIC_POL_LOW, | |
cb654695 | 603 | (triggering == |
4be44fcd LB |
604 | ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : |
605 | IOSAPIC_LEVEL); | |
1da177e4 | 606 | } |
4be44fcd | 607 | |
1da177e4 LT |
608 | EXPORT_SYMBOL(acpi_register_gsi); |
609 | ||
4be44fcd | 610 | void acpi_unregister_gsi(u32 gsi) |
1da177e4 LT |
611 | { |
612 | iosapic_unregister_intr(gsi); | |
613 | } | |
4be44fcd | 614 | |
1da177e4 | 615 | EXPORT_SYMBOL(acpi_unregister_gsi); |
1da177e4 | 616 | |
4be44fcd | 617 | static int __init acpi_parse_fadt(unsigned long phys_addr, unsigned long size) |
1da177e4 LT |
618 | { |
619 | struct acpi_table_header *fadt_header; | |
236ee8c3 | 620 | struct fadt_descriptor *fadt; |
1da177e4 LT |
621 | |
622 | if (!phys_addr || !size) | |
623 | return -EINVAL; | |
624 | ||
4be44fcd | 625 | fadt_header = (struct acpi_table_header *)__va(phys_addr); |
1da177e4 | 626 | if (fadt_header->revision != 3) |
4be44fcd | 627 | return -ENODEV; /* Only deal with ACPI 2.0 FADT */ |
1da177e4 | 628 | |
236ee8c3 | 629 | fadt = (struct fadt_descriptor *)fadt_header; |
1da177e4 | 630 | |
1da177e4 LT |
631 | acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW); |
632 | return 0; | |
633 | } | |
634 | ||
4be44fcd | 635 | unsigned long __init acpi_find_rsdp(void) |
1da177e4 LT |
636 | { |
637 | unsigned long rsdp_phys = 0; | |
638 | ||
b2c99e3c BH |
639 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
640 | rsdp_phys = efi.acpi20; | |
641 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) | |
4be44fcd LB |
642 | printk(KERN_WARNING PREFIX |
643 | "v1.0/r0.71 tables no longer supported\n"); | |
1da177e4 LT |
644 | return rsdp_phys; |
645 | } | |
646 | ||
4be44fcd | 647 | int __init acpi_boot_init(void) |
1da177e4 LT |
648 | { |
649 | ||
650 | /* | |
651 | * MADT | |
652 | * ---- | |
653 | * Parse the Multiple APIC Description Table (MADT), if exists. | |
654 | * Note that this table provides platform SMP configuration | |
655 | * information -- the successor to MPS tables. | |
656 | */ | |
657 | ||
658 | if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) { | |
659 | printk(KERN_ERR PREFIX "Can't find MADT\n"); | |
660 | goto skip_madt; | |
661 | } | |
662 | ||
663 | /* Local APIC */ | |
664 | ||
4be44fcd LB |
665 | if (acpi_table_parse_madt |
666 | (ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0) | |
667 | printk(KERN_ERR PREFIX | |
668 | "Error parsing LAPIC address override entry\n"); | |
1da177e4 | 669 | |
4be44fcd LB |
670 | if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS) |
671 | < 1) | |
672 | printk(KERN_ERR PREFIX | |
673 | "Error parsing MADT - no LAPIC entries\n"); | |
1da177e4 | 674 | |
4be44fcd LB |
675 | if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0) |
676 | < 0) | |
1da177e4 LT |
677 | printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); |
678 | ||
679 | /* I/O APIC */ | |
680 | ||
4be44fcd LB |
681 | if (acpi_table_parse_madt |
682 | (ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) | |
683 | printk(KERN_ERR PREFIX | |
684 | "Error parsing MADT - no IOSAPIC entries\n"); | |
1da177e4 LT |
685 | |
686 | /* System-Level Interrupt Routing */ | |
687 | ||
4be44fcd LB |
688 | if (acpi_table_parse_madt |
689 | (ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src, | |
690 | ACPI_MAX_PLATFORM_INTERRUPTS) < 0) | |
691 | printk(KERN_ERR PREFIX | |
692 | "Error parsing platform interrupt source entry\n"); | |
1da177e4 | 693 | |
4be44fcd LB |
694 | if (acpi_table_parse_madt |
695 | (ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0) | |
696 | printk(KERN_ERR PREFIX | |
697 | "Error parsing interrupt source overrides entry\n"); | |
1da177e4 LT |
698 | |
699 | if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0) | |
700 | printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); | |
4be44fcd | 701 | skip_madt: |
1da177e4 LT |
702 | |
703 | /* | |
704 | * FADT says whether a legacy keyboard controller is present. | |
705 | * The FADT also contains an SCI_INT line, by which the system | |
706 | * gets interrupts such as power and sleep buttons. If it's not | |
707 | * on a Legacy interrupt, it needs to be setup. | |
708 | */ | |
709 | if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1) | |
710 | printk(KERN_ERR PREFIX "Can't find FADT\n"); | |
711 | ||
712 | #ifdef CONFIG_SMP | |
713 | if (available_cpus == 0) { | |
714 | printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n"); | |
715 | printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id()); | |
4be44fcd LB |
716 | smp_boot_data.cpu_phys_id[available_cpus] = |
717 | hard_smp_processor_id(); | |
718 | available_cpus = 1; /* We've got at least one of these, no? */ | |
1da177e4 LT |
719 | } |
720 | smp_boot_data.cpu_count = available_cpus; | |
721 | ||
722 | smp_build_cpu_map(); | |
723 | # ifdef CONFIG_ACPI_NUMA | |
724 | if (srat_num_cpus == 0) { | |
725 | int cpu, i = 1; | |
726 | for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++) | |
4be44fcd LB |
727 | if (smp_boot_data.cpu_phys_id[cpu] != |
728 | hard_smp_processor_id()) | |
729 | node_cpuid[i++].phys_id = | |
730 | smp_boot_data.cpu_phys_id[cpu]; | |
1da177e4 | 731 | } |
1da177e4 | 732 | # endif |
8d7e3517 TL |
733 | #endif |
734 | #ifdef CONFIG_ACPI_NUMA | |
735 | build_cpu_to_node_map(); | |
1da177e4 LT |
736 | #endif |
737 | /* Make boot-up look pretty */ | |
4be44fcd LB |
738 | printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, |
739 | total_cpus); | |
1da177e4 LT |
740 | return 0; |
741 | } | |
742 | ||
4be44fcd | 743 | int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) |
1da177e4 LT |
744 | { |
745 | int vector; | |
746 | ||
747 | if (has_8259 && gsi < 16) | |
748 | *irq = isa_irq_to_vector(gsi); | |
749 | else { | |
750 | vector = gsi_to_vector(gsi); | |
751 | if (vector == -1) | |
752 | return -1; | |
753 | ||
754 | *irq = vector; | |
755 | } | |
756 | return 0; | |
757 | } | |
758 | ||
759 | /* | |
760 | * ACPI based hotplug CPU support | |
761 | */ | |
762 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
763 | static | |
4be44fcd | 764 | int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid) |
1da177e4 LT |
765 | { |
766 | #ifdef CONFIG_ACPI_NUMA | |
4be44fcd | 767 | int pxm_id; |
08992986 | 768 | int nid; |
1da177e4 LT |
769 | |
770 | pxm_id = acpi_get_pxm(handle); | |
1da177e4 | 771 | /* |
08992986 KH |
772 | * We don't have cpu-only-node hotadd. But if the system equips |
773 | * SRAT table, pxm is already found and node is ready. | |
774 | * So, just pxm_to_nid(pxm) is OK. | |
775 | * This code here is for the system which doesn't have full SRAT | |
776 | * table for possible cpus. | |
1da177e4 | 777 | */ |
08992986 | 778 | nid = acpi_map_pxm_to_node(pxm_id); |
4be44fcd | 779 | node_cpuid[cpu].phys_id = physid; |
08992986 | 780 | node_cpuid[cpu].nid = nid; |
1da177e4 | 781 | #endif |
4be44fcd | 782 | return (0); |
1da177e4 LT |
783 | } |
784 | ||
a6b14fa6 AR |
785 | int additional_cpus __initdata = -1; |
786 | ||
787 | static __init int setup_additional_cpus(char *s) | |
788 | { | |
789 | if (s) | |
790 | additional_cpus = simple_strtol(s, NULL, 0); | |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
795 | early_param("additional_cpus", setup_additional_cpus); | |
796 | ||
797 | /* | |
798 | * cpu_possible_map should be static, it cannot change as cpu's | |
799 | * are onlined, or offlined. The reason is per-cpu data-structures | |
800 | * are allocated by some modules at init time, and dont expect to | |
801 | * do this dynamically on cpu arrival/departure. | |
802 | * cpu_present_map on the other hand can change dynamically. | |
803 | * In case when cpu_hotplug is not compiled, then we resort to current | |
804 | * behaviour, which is cpu_possible == cpu_present. | |
805 | * - Ashok Raj | |
806 | * | |
807 | * Three ways to find out the number of additional hotplug CPUs: | |
808 | * - If the BIOS specified disabled CPUs in ACPI/mptables use that. | |
809 | * - The user can overwrite it with additional_cpus=NUM | |
810 | * - Otherwise don't reserve additional CPUs. | |
811 | */ | |
812 | __init void prefill_possible_map(void) | |
813 | { | |
814 | int i; | |
815 | int possible, disabled_cpus; | |
816 | ||
817 | disabled_cpus = total_cpus - available_cpus; | |
8f8b1138 | 818 | |
a6b14fa6 | 819 | if (additional_cpus == -1) { |
8f8b1138 | 820 | if (disabled_cpus > 0) |
a6b14fa6 | 821 | additional_cpus = disabled_cpus; |
8f8b1138 | 822 | else |
a6b14fa6 | 823 | additional_cpus = 0; |
8f8b1138 AR |
824 | } |
825 | ||
826 | possible = available_cpus + additional_cpus; | |
827 | ||
a6b14fa6 AR |
828 | if (possible > NR_CPUS) |
829 | possible = NR_CPUS; | |
830 | ||
831 | printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n", | |
8f8b1138 | 832 | possible, max((possible - available_cpus), 0)); |
a6b14fa6 AR |
833 | |
834 | for (i = 0; i < possible; i++) | |
835 | cpu_set(i, cpu_possible_map); | |
836 | } | |
837 | ||
4be44fcd | 838 | int acpi_map_lsapic(acpi_handle handle, int *pcpu) |
1da177e4 | 839 | { |
4be44fcd | 840 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 LT |
841 | union acpi_object *obj; |
842 | struct acpi_table_lsapic *lsapic; | |
843 | cpumask_t tmp_map; | |
844 | long physid; | |
845 | int cpu; | |
4be44fcd | 846 | |
1da177e4 LT |
847 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) |
848 | return -EINVAL; | |
849 | ||
4be44fcd | 850 | if (!buffer.length || !buffer.pointer) |
1da177e4 | 851 | return -EINVAL; |
4be44fcd | 852 | |
1da177e4 LT |
853 | obj = buffer.pointer; |
854 | if (obj->type != ACPI_TYPE_BUFFER || | |
855 | obj->buffer.length < sizeof(*lsapic)) { | |
02438d87 | 856 | kfree(buffer.pointer); |
1da177e4 LT |
857 | return -EINVAL; |
858 | } | |
859 | ||
860 | lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer; | |
861 | ||
862 | if ((lsapic->header.type != ACPI_MADT_LSAPIC) || | |
863 | (!lsapic->flags.enabled)) { | |
02438d87 | 864 | kfree(buffer.pointer); |
1da177e4 LT |
865 | return -EINVAL; |
866 | } | |
867 | ||
4be44fcd | 868 | physid = ((lsapic->id << 8) | (lsapic->eid)); |
1da177e4 | 869 | |
02438d87 | 870 | kfree(buffer.pointer); |
1da177e4 LT |
871 | buffer.length = ACPI_ALLOCATE_BUFFER; |
872 | buffer.pointer = NULL; | |
873 | ||
874 | cpus_complement(tmp_map, cpu_present_map); | |
875 | cpu = first_cpu(tmp_map); | |
4be44fcd | 876 | if (cpu >= NR_CPUS) |
1da177e4 LT |
877 | return -EINVAL; |
878 | ||
879 | acpi_map_cpu2node(handle, cpu, physid); | |
880 | ||
4be44fcd | 881 | cpu_set(cpu, cpu_present_map); |
1da177e4 LT |
882 | ia64_cpu_to_sapicid[cpu] = physid; |
883 | ia64_acpiid_to_sapicid[lsapic->acpi_id] = ia64_cpu_to_sapicid[cpu]; | |
884 | ||
885 | *pcpu = cpu; | |
4be44fcd | 886 | return (0); |
1da177e4 | 887 | } |
1da177e4 | 888 | |
4be44fcd | 889 | EXPORT_SYMBOL(acpi_map_lsapic); |
1da177e4 | 890 | |
4be44fcd | 891 | int acpi_unmap_lsapic(int cpu) |
1da177e4 LT |
892 | { |
893 | int i; | |
894 | ||
4be44fcd LB |
895 | for (i = 0; i < MAX_SAPICS; i++) { |
896 | if (ia64_acpiid_to_sapicid[i] == ia64_cpu_to_sapicid[cpu]) { | |
897 | ia64_acpiid_to_sapicid[i] = -1; | |
898 | break; | |
899 | } | |
900 | } | |
1da177e4 | 901 | ia64_cpu_to_sapicid[cpu] = -1; |
4be44fcd | 902 | cpu_clear(cpu, cpu_present_map); |
1da177e4 LT |
903 | |
904 | #ifdef CONFIG_ACPI_NUMA | |
905 | /* NUMA specific cleanup's */ | |
906 | #endif | |
907 | ||
4be44fcd | 908 | return (0); |
1da177e4 | 909 | } |
4be44fcd | 910 | |
1da177e4 | 911 | EXPORT_SYMBOL(acpi_unmap_lsapic); |
4be44fcd | 912 | #endif /* CONFIG_ACPI_HOTPLUG_CPU */ |
1da177e4 LT |
913 | |
914 | #ifdef CONFIG_ACPI_NUMA | |
650316f1 | 915 | static acpi_status __devinit |
4be44fcd | 916 | acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret) |
1da177e4 | 917 | { |
4be44fcd | 918 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 LT |
919 | union acpi_object *obj; |
920 | struct acpi_table_iosapic *iosapic; | |
921 | unsigned int gsi_base; | |
bb0fc085 | 922 | int pxm, node; |
1da177e4 LT |
923 | |
924 | /* Only care about objects w/ a method that returns the MADT */ | |
925 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
926 | return AE_OK; | |
927 | ||
928 | if (!buffer.length || !buffer.pointer) | |
929 | return AE_OK; | |
930 | ||
931 | obj = buffer.pointer; | |
932 | if (obj->type != ACPI_TYPE_BUFFER || | |
933 | obj->buffer.length < sizeof(*iosapic)) { | |
02438d87 | 934 | kfree(buffer.pointer); |
1da177e4 LT |
935 | return AE_OK; |
936 | } | |
937 | ||
938 | iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer; | |
939 | ||
940 | if (iosapic->header.type != ACPI_MADT_IOSAPIC) { | |
02438d87 | 941 | kfree(buffer.pointer); |
1da177e4 LT |
942 | return AE_OK; |
943 | } | |
944 | ||
945 | gsi_base = iosapic->global_irq_base; | |
946 | ||
02438d87 | 947 | kfree(buffer.pointer); |
1da177e4 LT |
948 | |
949 | /* | |
bb0fc085 | 950 | * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell |
1da177e4 LT |
951 | * us which node to associate this with. |
952 | */ | |
bb0fc085 AW |
953 | pxm = acpi_get_pxm(handle); |
954 | if (pxm < 0) | |
1da177e4 | 955 | return AE_OK; |
1da177e4 | 956 | |
762834e8 | 957 | node = pxm_to_node(pxm); |
1da177e4 LT |
958 | |
959 | if (node >= MAX_NUMNODES || !node_online(node) || | |
960 | cpus_empty(node_to_cpumask(node))) | |
961 | return AE_OK; | |
962 | ||
963 | /* We know a gsi to node mapping! */ | |
964 | map_iosapic_to_node(gsi_base, node); | |
965 | return AE_OK; | |
966 | } | |
650316f1 BH |
967 | |
968 | static int __init | |
969 | acpi_map_iosapics (void) | |
970 | { | |
971 | acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL); | |
972 | return 0; | |
973 | } | |
974 | ||
975 | fs_initcall(acpi_map_iosapics); | |
976 | #endif /* CONFIG_ACPI_NUMA */ | |
b1bb248a | 977 | |
4be44fcd | 978 | int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) |
b1bb248a | 979 | { |
0e888adc KK |
980 | int err; |
981 | ||
982 | if ((err = iosapic_init(phys_addr, gsi_base))) | |
983 | return err; | |
984 | ||
24b8e0cc | 985 | #ifdef CONFIG_ACPI_NUMA |
0e888adc | 986 | acpi_map_iosapic(handle, 0, NULL, NULL); |
4be44fcd | 987 | #endif /* CONFIG_ACPI_NUMA */ |
0e888adc KK |
988 | |
989 | return 0; | |
b1bb248a | 990 | } |
4be44fcd | 991 | |
b1bb248a KK |
992 | EXPORT_SYMBOL(acpi_register_ioapic); |
993 | ||
4be44fcd | 994 | int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) |
b1bb248a | 995 | { |
0e888adc | 996 | return iosapic_remove(gsi_base); |
b1bb248a | 997 | } |
4be44fcd | 998 | |
b1bb248a KK |
999 | EXPORT_SYMBOL(acpi_unregister_ioapic); |
1000 | ||
888ba6c6 | 1001 | #endif /* CONFIG_ACPI */ |