blob: 5837f857ac2e82aff69a5d9bf7e619ace323d946 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * acpi_tables.c - ACPI Boot-Time Table Parsing
3 *
4 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 */
25
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/init.h>
27#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/smp.h>
29#include <linux/string.h>
30#include <linux/types.h>
31#include <linux/irq.h>
32#include <linux/errno.h>
33#include <linux/acpi.h>
34#include <linux/bootmem.h>
35
36#define PREFIX "ACPI: "
37
Len Brown04348e62005-12-30 02:44:59 -050038#define ACPI_MAX_TABLES 128
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Linus Torvalds1da177e2005-04-16 15:20:36 -070040static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
41static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
42
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030043static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Len Brown4e381a42007-03-30 14:16:10 -040045static int acpi_apic_instance __initdata;
Len Browna1fdcc02007-03-11 03:26:14 -040046
47void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
Linus Torvalds1da177e2005-04-16 15:20:36 -070048{
49 if (!header)
50 return;
51
52 switch (header->type) {
53
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030054 case ACPI_MADT_TYPE_LOCAL_APIC:
Len Brown4be44fc2005-08-05 00:44:28 -040055 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030056 struct acpi_madt_local_apic *p =
57 (struct acpi_madt_local_apic *)header;
Len Brown4be44fc2005-08-05 00:44:28 -040058 printk(KERN_INFO PREFIX
59 "LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030060 p->processor_id, p->id,
61 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
Len Brown4be44fc2005-08-05 00:44:28 -040062 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 break;
64
Suresh Siddha7237d3d2009-03-30 13:55:30 -080065 case ACPI_MADT_TYPE_LOCAL_X2APIC:
66 {
67 struct acpi_madt_local_x2apic *p =
68 (struct acpi_madt_local_x2apic *)header;
69 printk(KERN_INFO PREFIX
70 "X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
71 p->local_apic_id, p->uid,
72 (p->lapic_flags & ACPI_MADT_ENABLED) ?
73 "enabled" : "disabled");
74 }
75 break;
76
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030077 case ACPI_MADT_TYPE_IO_APIC:
Len Brown4be44fc2005-08-05 00:44:28 -040078 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030079 struct acpi_madt_io_apic *p =
80 (struct acpi_madt_io_apic *)header;
Len Brown4be44fc2005-08-05 00:44:28 -040081 printk(KERN_INFO PREFIX
82 "IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
83 p->id, p->address, p->global_irq_base);
84 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 break;
86
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030087 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
Len Brown4be44fc2005-08-05 00:44:28 -040088 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030089 struct acpi_madt_interrupt_override *p =
90 (struct acpi_madt_interrupt_override *)header;
Len Brown4be44fc2005-08-05 00:44:28 -040091 printk(KERN_INFO PREFIX
92 "INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030093 p->bus, p->source_irq, p->global_irq,
94 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
95 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
96 if (p->inti_flags &
97 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
Len Brown4be44fc2005-08-05 00:44:28 -040098 printk(KERN_INFO PREFIX
99 "INT_SRC_OVR unexpected reserved flags: 0x%x\n",
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300100 p->inti_flags &
101 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Len Brown4be44fc2005-08-05 00:44:28 -0400103 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 break;
105
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300106 case ACPI_MADT_TYPE_NMI_SOURCE:
Len Brown4be44fc2005-08-05 00:44:28 -0400107 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300108 struct acpi_madt_nmi_source *p =
109 (struct acpi_madt_nmi_source *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400110 printk(KERN_INFO PREFIX
111 "NMI_SRC (%s %s global_irq %d)\n",
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300112 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
113 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
Len Brown4be44fc2005-08-05 00:44:28 -0400114 p->global_irq);
115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 break;
117
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300118 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
Len Brown4be44fc2005-08-05 00:44:28 -0400119 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300120 struct acpi_madt_local_apic_nmi *p =
121 (struct acpi_madt_local_apic_nmi *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400122 printk(KERN_INFO PREFIX
123 "LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300124 p->processor_id,
125 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
126 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
Len Brown4be44fc2005-08-05 00:44:28 -0400127 p->lint);
128 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 break;
130
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800131 case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
132 {
133 u16 polarity, trigger;
134 struct acpi_madt_local_x2apic_nmi *p =
135 (struct acpi_madt_local_x2apic_nmi *)header;
136
137 polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
138 trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
139
140 printk(KERN_INFO PREFIX
141 "X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
142 p->uid,
143 mps_inti_flags_polarity[polarity],
144 mps_inti_flags_trigger[trigger],
145 p->lint);
146 }
147 break;
148
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300149 case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
Len Brown4be44fc2005-08-05 00:44:28 -0400150 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300151 struct acpi_madt_local_apic_override *p =
152 (struct acpi_madt_local_apic_override *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400153 printk(KERN_INFO PREFIX
154 "LAPIC_ADDR_OVR (address[%p])\n",
155 (void *)(unsigned long)p->address);
156 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 break;
158
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300159 case ACPI_MADT_TYPE_IO_SAPIC:
Len Brown4be44fc2005-08-05 00:44:28 -0400160 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300161 struct acpi_madt_io_sapic *p =
162 (struct acpi_madt_io_sapic *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400163 printk(KERN_INFO PREFIX
164 "IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
165 p->id, (void *)(unsigned long)p->address,
166 p->global_irq_base);
167 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 break;
169
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300170 case ACPI_MADT_TYPE_LOCAL_SAPIC:
Len Brown4be44fc2005-08-05 00:44:28 -0400171 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300172 struct acpi_madt_local_sapic *p =
173 (struct acpi_madt_local_sapic *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400174 printk(KERN_INFO PREFIX
175 "LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300176 p->processor_id, p->id, p->eid,
177 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
Len Brown4be44fc2005-08-05 00:44:28 -0400178 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 break;
180
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300181 case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
Len Brown4be44fc2005-08-05 00:44:28 -0400182 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300183 struct acpi_madt_interrupt_source *p =
184 (struct acpi_madt_interrupt_source *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400185 printk(KERN_INFO PREFIX
186 "PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300187 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
188 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
189 p->type, p->id, p->eid, p->io_sapic_vector,
Len Brown4be44fc2005-08-05 00:44:28 -0400190 p->global_irq);
191 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 break;
193
194 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400195 printk(KERN_WARNING PREFIX
196 "Found unsupported MADT entry (type = 0x%x)\n",
197 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 break;
199 }
200}
201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203int __init
Len Brown6eb87fe2007-02-10 22:17:07 -0500204acpi_table_parse_entries(char *id,
205 unsigned long table_size,
Len Brown4be44fc2005-08-05 00:44:28 -0400206 int entry_id,
Lv Zhengb43e1062013-01-12 15:29:38 +0000207 acpi_tbl_entry_handler handler,
Len Brown4be44fc2005-08-05 00:44:28 -0400208 unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
Len Brown6eb87fe2007-02-10 22:17:07 -0500210 struct acpi_table_header *table_header = NULL;
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300211 struct acpi_subtable_header *entry;
Len Brown4be44fc2005-08-05 00:44:28 -0400212 unsigned int count = 0;
Len Brown6eb87fe2007-02-10 22:17:07 -0500213 unsigned long table_end;
Yinghai Lu7d972772009-02-07 15:39:41 -0800214 acpi_size tbl_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Len Brown68ca4062010-02-19 00:09:22 -0500216 if (acpi_disabled)
Len Browne5b8fc62009-07-07 23:22:58 -0400217 return -ENODEV;
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 if (!handler)
220 return -EINVAL;
221
Len Browna1fdcc02007-03-11 03:26:14 -0400222 if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
Yinghai Lu7d972772009-02-07 15:39:41 -0800223 acpi_get_table_with_size(id, acpi_apic_instance, &table_header, &tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400224 else
Yinghai Lu7d972772009-02-07 15:39:41 -0800225 acpi_get_table_with_size(id, 0, &table_header, &tbl_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Len Brown6eb87fe2007-02-10 22:17:07 -0500227 if (!table_header) {
Alexey Starikovskiyceb6c462007-02-02 19:48:22 +0300228 printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 return -ENODEV;
230 }
231
Len Brown6eb87fe2007-02-10 22:17:07 -0500232 table_end = (unsigned long)table_header + table_header->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234 /* Parse all entries looking for a match. */
235
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300236 entry = (struct acpi_subtable_header *)
Len Brown6eb87fe2007-02-10 22:17:07 -0500237 ((unsigned long)table_header + table_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300239 while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
Len Brown6eb87fe2007-02-10 22:17:07 -0500240 table_end) {
Len Brown4be44fc2005-08-05 00:44:28 -0400241 if (entry->type == entry_id
242 && (!max_entries || count++ < max_entries))
Fenghua Yu369d9132012-09-25 11:11:43 -0700243 if (handler(entry, table_end))
244 goto err;
245
246 /*
247 * If entry->length is 0, break from this loop to avoid
248 * infinite loop.
249 */
250 if (entry->length == 0) {
251 pr_err(PREFIX "[%4.4s:0x%02x] Invalid zero length\n", id, entry_id);
252 goto err;
253 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300255 entry = (struct acpi_subtable_header *)
Len Brown4be44fc2005-08-05 00:44:28 -0400256 ((unsigned long)entry + entry->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 }
258 if (max_entries && count > max_entries) {
Alexey Starikovskiyceb6c462007-02-02 19:48:22 +0300259 printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of "
260 "%i found\n", id, entry_id, count - max_entries, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 }
262
Yinghai Lu7d972772009-02-07 15:39:41 -0800263 early_acpi_os_unmap_memory((char *)table_header, tbl_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 return count;
Fenghua Yu369d9132012-09-25 11:11:43 -0700265err:
266 early_acpi_os_unmap_memory((char *)table_header, tbl_size);
267 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268}
269
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270int __init
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300271acpi_table_parse_madt(enum acpi_madt_type id,
Lv Zhengb43e1062013-01-12 15:29:38 +0000272 acpi_tbl_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273{
Len Brown6eb87fe2007-02-10 22:17:07 -0500274 return acpi_table_parse_entries(ACPI_SIG_MADT,
Len Brown4be44fc2005-08-05 00:44:28 -0400275 sizeof(struct acpi_table_madt), id,
276 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277}
278
Len Brown7f8f97c2007-02-10 21:28:03 -0500279/**
280 * acpi_table_parse - find table with @id, run @handler on it
Len Brown7f8f97c2007-02-10 21:28:03 -0500281 * @id: table id to find
282 * @handler: handler to run
283 *
284 * Scan the ACPI System Descriptor Table (STD) for a table matching @id,
tangchenf8a571b2014-01-06 16:47:59 +0800285 * run @handler on it.
286 *
287 * Return 0 if table found, -errno if not.
Len Brown7f8f97c2007-02-10 21:28:03 -0500288 */
Lv Zhengb43e1062013-01-12 15:29:38 +0000289int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290{
Alexey Starikovskiyceb6c462007-02-02 19:48:22 +0300291 struct acpi_table_header *table = NULL;
Yinghai Lu7d972772009-02-07 15:39:41 -0800292 acpi_size tbl_size;
Len Browna1fdcc02007-03-11 03:26:14 -0400293
Len Brown68ca4062010-02-19 00:09:22 -0500294 if (acpi_disabled)
Len Browne5b8fc62009-07-07 23:22:58 -0400295 return -ENODEV;
296
tangchende2d1a72014-01-06 16:43:54 +0800297 if (!id || !handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 return -EINVAL;
299
Len Browna1fdcc02007-03-11 03:26:14 -0400300 if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
Yinghai Lu7d972772009-02-07 15:39:41 -0800301 acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400302 else
Yinghai Lu7d972772009-02-07 15:39:41 -0800303 acpi_get_table_with_size(id, 0, &table, &tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400304
Alexey Starikovskiyceb6c462007-02-02 19:48:22 +0300305 if (table) {
306 handler(table);
Yinghai Lu7d972772009-02-07 15:39:41 -0800307 early_acpi_os_unmap_memory(table, tbl_size);
Alexey Starikovskiyceb6c462007-02-02 19:48:22 +0300308 return 0;
Len Brown7f8f97c2007-02-10 21:28:03 -0500309 } else
Hanjun Guo95df8122013-12-05 23:42:38 +0800310 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311}
312
Len Browna1fdcc02007-03-11 03:26:14 -0400313/*
314 * The BIOS is supposed to supply a single APIC/MADT,
315 * but some report two. Provide a knob to use either.
316 * (don't you wish instance 0 and 1 were not the same?)
317 */
318static void __init check_multiple_madt(void)
319{
320 struct acpi_table_header *table = NULL;
Yinghai Lu7d972772009-02-07 15:39:41 -0800321 acpi_size tbl_size;
Len Browna1fdcc02007-03-11 03:26:14 -0400322
Yinghai Lu7d972772009-02-07 15:39:41 -0800323 acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400324 if (table) {
325 printk(KERN_WARNING PREFIX
326 "BIOS bug: multiple APIC/MADT found,"
327 " using %d\n", acpi_apic_instance);
328 printk(KERN_WARNING PREFIX
329 "If \"acpi_apic_instance=%d\" works better, "
330 "notify linux-acpi@vger.kernel.org\n",
331 acpi_apic_instance ? 0 : 2);
Yinghai Lu7d972772009-02-07 15:39:41 -0800332 early_acpi_os_unmap_memory(table, tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400333
334 } else
335 acpi_apic_instance = 0;
336
337 return;
338}
339
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340/*
341 * acpi_table_init()
342 *
343 * find RSDP, find and checksum SDT/XSDT.
344 * checksum all tables, print SDT/XSDT
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300345 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 * result: sdt_entry[] is initialized
347 */
348
Len Brown4be44fc2005-08-05 00:44:28 -0400349int __init acpi_table_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
Len Brown9e3a9d12009-02-06 14:00:56 -0500351 acpi_status status;
352
353 status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
354 if (ACPI_FAILURE(status))
Hanjun Guo95df8122013-12-05 23:42:38 +0800355 return -EINVAL;
Len Brown9e3a9d12009-02-06 14:00:56 -0500356
Len Browna1fdcc02007-03-11 03:26:14 -0400357 check_multiple_madt();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 return 0;
359}
Len Browna1fdcc02007-03-11 03:26:14 -0400360
361static int __init acpi_parse_apic_instance(char *str)
362{
Cyrill Gorcunovf0df2d62008-08-20 16:41:45 -0700363 if (!str)
364 return -EINVAL;
Len Browna1fdcc02007-03-11 03:26:14 -0400365
366 acpi_apic_instance = simple_strtoul(str, NULL, 0);
367
368 printk(KERN_NOTICE PREFIX "Shall use APIC/MADT table %d\n",
369 acpi_apic_instance);
370
371 return 0;
372}
373
374early_param("acpi_apic_instance", acpi_parse_apic_instance);