blob: ebdf5643cd8e36e04b55392ebe9bb409db95bf1c [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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 *
20 */
21
Hanjun Guo07f438d2015-03-24 14:02:34 +000022/* Uncomment next line to get verbose printout */
23/* #define DEBUG */
Hanjun Guo730bf5e2014-02-20 15:45:33 +080024#define pr_fmt(fmt) "ACPI: " fmt
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
Len Brown04348e62005-12-30 02:44:59 -050036#define ACPI_MAX_TABLES 128
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Linus Torvalds1da177e2005-04-16 15:20:36 -070038static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
39static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
40
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030041static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Len Brown4e381a42007-03-30 14:16:10 -040043static int acpi_apic_instance __initdata;
Len Browna1fdcc02007-03-11 03:26:14 -040044
Lv Zheng4fc0a7e2014-05-31 08:15:02 +080045/*
46 * Disable table checksum verification for the early stage due to the size
47 * limitation of the current x86 early mapping implementation.
48 */
49static bool acpi_verify_table_checksum __initdata = false;
50
Len Browna1fdcc02007-03-11 03:26:14 -040051void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
53 if (!header)
54 return;
55
56 switch (header->type) {
57
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030058 case ACPI_MADT_TYPE_LOCAL_APIC:
Len Brown4be44fc2005-08-05 00:44:28 -040059 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030060 struct acpi_madt_local_apic *p =
61 (struct acpi_madt_local_apic *)header;
Hanjun Guo07f438d2015-03-24 14:02:34 +000062 pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
63 p->processor_id, p->id,
64 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
Len Brown4be44fc2005-08-05 00:44:28 -040065 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 break;
67
Suresh Siddha7237d3d2009-03-30 13:55:30 -080068 case ACPI_MADT_TYPE_LOCAL_X2APIC:
69 {
70 struct acpi_madt_local_x2apic *p =
71 (struct acpi_madt_local_x2apic *)header;
Hanjun Guo07f438d2015-03-24 14:02:34 +000072 pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
73 p->local_apic_id, p->uid,
74 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
Suresh Siddha7237d3d2009-03-30 13:55:30 -080075 }
76 break;
77
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030078 case ACPI_MADT_TYPE_IO_APIC:
Len Brown4be44fc2005-08-05 00:44:28 -040079 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030080 struct acpi_madt_io_apic *p =
81 (struct acpi_madt_io_apic *)header;
Hanjun Guo07f438d2015-03-24 14:02:34 +000082 pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
83 p->id, p->address, p->global_irq_base);
Len Brown4be44fc2005-08-05 00:44:28 -040084 }
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;
Hanjun Guo730bf5e2014-02-20 15:45:33 +080091 pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
92 p->bus, p->source_irq, p->global_irq,
93 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
94 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030095 if (p->inti_flags &
96 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
Hanjun Guo730bf5e2014-02-20 15:45:33 +080097 pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n",
98 p->inti_flags &
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +030099 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
Len Brown4be44fc2005-08-05 00:44:28 -0400100 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 break;
102
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300103 case ACPI_MADT_TYPE_NMI_SOURCE:
Len Brown4be44fc2005-08-05 00:44:28 -0400104 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300105 struct acpi_madt_nmi_source *p =
106 (struct acpi_madt_nmi_source *)header;
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800107 pr_info("NMI_SRC (%s %s global_irq %d)\n",
108 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
109 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
110 p->global_irq);
Len Brown4be44fc2005-08-05 00:44:28 -0400111 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 break;
113
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300114 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
Len Brown4be44fc2005-08-05 00:44:28 -0400115 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300116 struct acpi_madt_local_apic_nmi *p =
117 (struct acpi_madt_local_apic_nmi *)header;
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800118 pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
119 p->processor_id,
120 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
121 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
122 p->lint);
Len Brown4be44fc2005-08-05 00:44:28 -0400123 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 break;
125
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800126 case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
127 {
128 u16 polarity, trigger;
129 struct acpi_madt_local_x2apic_nmi *p =
130 (struct acpi_madt_local_x2apic_nmi *)header;
131
132 polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
133 trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
134
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800135 pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
136 p->uid,
137 mps_inti_flags_polarity[polarity],
138 mps_inti_flags_trigger[trigger],
139 p->lint);
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800140 }
141 break;
142
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300143 case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
Len Brown4be44fc2005-08-05 00:44:28 -0400144 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300145 struct acpi_madt_local_apic_override *p =
146 (struct acpi_madt_local_apic_override *)header;
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800147 pr_info("LAPIC_ADDR_OVR (address[%p])\n",
148 (void *)(unsigned long)p->address);
Len Brown4be44fc2005-08-05 00:44:28 -0400149 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 break;
151
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300152 case ACPI_MADT_TYPE_IO_SAPIC:
Len Brown4be44fc2005-08-05 00:44:28 -0400153 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300154 struct acpi_madt_io_sapic *p =
155 (struct acpi_madt_io_sapic *)header;
Hanjun Guo07f438d2015-03-24 14:02:34 +0000156 pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
157 p->id, (void *)(unsigned long)p->address,
158 p->global_irq_base);
Len Brown4be44fc2005-08-05 00:44:28 -0400159 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 break;
161
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300162 case ACPI_MADT_TYPE_LOCAL_SAPIC:
Len Brown4be44fc2005-08-05 00:44:28 -0400163 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300164 struct acpi_madt_local_sapic *p =
165 (struct acpi_madt_local_sapic *)header;
Hanjun Guo07f438d2015-03-24 14:02:34 +0000166 pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
167 p->processor_id, p->id, p->eid,
168 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
Len Brown4be44fc2005-08-05 00:44:28 -0400169 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 break;
171
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300172 case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
Len Brown4be44fc2005-08-05 00:44:28 -0400173 {
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300174 struct acpi_madt_interrupt_source *p =
175 (struct acpi_madt_interrupt_source *)header;
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800176 pr_info("PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
177 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
178 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
179 p->type, p->id, p->eid, p->io_sapic_vector,
180 p->global_irq);
Len Brown4be44fc2005-08-05 00:44:28 -0400181 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 break;
183
Hanjun Guo4c1c8d72015-03-24 14:02:44 +0000184 case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
185 {
186 struct acpi_madt_generic_interrupt *p =
187 (struct acpi_madt_generic_interrupt *)header;
188 pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n",
189 p->uid, p->base_address,
190 p->arm_mpidr,
191 (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
192
193 }
194 break;
195
196 case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
197 {
198 struct acpi_madt_generic_distributor *p =
199 (struct acpi_madt_generic_distributor *)header;
200 pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n",
201 p->gic_id, p->base_address,
202 p->global_irq_base);
203 }
204 break;
205
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 default:
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800207 pr_warn("Found unsupported MADT entry (type = 0x%x)\n",
208 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 break;
210 }
211}
212
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200213/**
214 * acpi_parse_entries_array - for each proc_num find a suitable subtable
215 *
216 * @id: table id (for debugging purposes)
217 * @table_size: single entry size
218 * @table_header: where does the table start?
219 * @proc: array of acpi_subtable_proc struct containing entry id
220 * and associated handler with it
221 * @proc_num: how big proc is?
222 * @max_entries: how many entries can we process?
223 *
224 * For each proc_num find a subtable with proc->id and run proc->handler
225 * on it. Assumption is that there's only single handler for particular
226 * entry id.
227 *
228 * On success returns sum of all matching entries for all proc handlers.
229 * Otherwise, -ENODEV or -EINVAL is returned.
230 */
231static int __init
232acpi_parse_entries_array(char *id, unsigned long table_size,
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800233 struct acpi_table_header *table_header,
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200234 struct acpi_subtable_proc *proc, int proc_num,
235 unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236{
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300237 struct acpi_subtable_header *entry;
Len Brown6eb87fe2007-02-10 22:17:07 -0500238 unsigned long table_end;
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200239 int count = 0;
240 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Len Brown68ca4062010-02-19 00:09:22 -0500242 if (acpi_disabled)
Len Browne5b8fc62009-07-07 23:22:58 -0400243 return -ENODEV;
244
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200245 if (!id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 return -EINVAL;
247
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800248 if (!table_size)
249 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Len Brown6eb87fe2007-02-10 22:17:07 -0500251 if (!table_header) {
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800252 pr_warn("%4.4s not present\n", id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 return -ENODEV;
254 }
255
Len Brown6eb87fe2007-02-10 22:17:07 -0500256 table_end = (unsigned long)table_header + table_header->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258 /* Parse all entries looking for a match. */
259
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300260 entry = (struct acpi_subtable_header *)
Len Brown6eb87fe2007-02-10 22:17:07 -0500261 ((unsigned long)table_header + table_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300263 while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
Len Brown6eb87fe2007-02-10 22:17:07 -0500264 table_end) {
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200265 if (max_entries && count >= max_entries)
266 break;
267
268 for (i = 0; i < proc_num; i++) {
269 if (entry->type != proc[i].id)
270 continue;
Dan Carpenter362414d2015-09-22 15:29:25 +0300271 if (!proc[i].handler ||
272 proc[i].handler(entry, table_end))
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800273 return -EINVAL;
Fenghua Yu369d9132012-09-25 11:11:43 -0700274
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200275 proc->count++;
276 break;
Tomasz Nowicki4ceacd02014-11-26 22:01:14 +0800277 }
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200278 if (i != proc_num)
279 count++;
Tomasz Nowicki4ceacd02014-11-26 22:01:14 +0800280
Fenghua Yu369d9132012-09-25 11:11:43 -0700281 /*
282 * If entry->length is 0, break from this loop to avoid
283 * infinite loop.
284 */
285 if (entry->length == 0) {
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200286 pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id);
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800287 return -EINVAL;
Fenghua Yu369d9132012-09-25 11:11:43 -0700288 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300290 entry = (struct acpi_subtable_header *)
Len Brown4be44fc2005-08-05 00:44:28 -0400291 ((unsigned long)entry + entry->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 }
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800293
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 if (max_entries && count > max_entries) {
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800295 pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200296 id, proc->id, count - max_entries, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 }
298
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800299 return count;
300}
301
302int __init
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200303acpi_parse_entries(char *id,
304 unsigned long table_size,
305 acpi_tbl_entry_handler handler,
306 struct acpi_table_header *table_header,
307 int entry_id, unsigned int max_entries)
308{
309 struct acpi_subtable_proc proc = {
310 .id = entry_id,
311 .handler = handler,
312 };
313
314 return acpi_parse_entries_array(id, table_size, table_header,
315 &proc, 1, max_entries);
316}
317
318int __init
319acpi_table_parse_entries_array(char *id,
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800320 unsigned long table_size,
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200321 struct acpi_subtable_proc *proc, int proc_num,
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800322 unsigned int max_entries)
323{
324 struct acpi_table_header *table_header = NULL;
325 acpi_size tbl_size;
326 int count;
327 u32 instance = 0;
328
329 if (acpi_disabled)
330 return -ENODEV;
331
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200332 if (!id)
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800333 return -EINVAL;
334
335 if (!strncmp(id, ACPI_SIG_MADT, 4))
336 instance = acpi_apic_instance;
337
338 acpi_get_table_with_size(id, instance, &table_header, &tbl_size);
339 if (!table_header) {
340 pr_warn("%4.4s not present\n", id);
341 return -ENODEV;
342 }
343
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200344 count = acpi_parse_entries_array(id, table_size, table_header,
345 proc, proc_num, max_entries);
Ashwin Chaugulef08bb472014-11-26 22:01:13 +0800346
Yinghai Lu7d972772009-02-07 15:39:41 -0800347 early_acpi_os_unmap_memory((char *)table_header, tbl_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 return count;
349}
350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351int __init
Lukasz Anaczkowski9b3fedd2015-09-09 15:47:28 +0200352acpi_table_parse_entries(char *id,
353 unsigned long table_size,
354 int entry_id,
355 acpi_tbl_entry_handler handler,
356 unsigned int max_entries)
357{
358 struct acpi_subtable_proc proc = {
359 .id = entry_id,
360 .handler = handler,
361 };
362
363 return acpi_table_parse_entries_array(id, table_size, &proc, 1,
364 max_entries);
365}
366
367int __init
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300368acpi_table_parse_madt(enum acpi_madt_type id,
Lv Zhengb43e1062013-01-12 15:29:38 +0000369 acpi_tbl_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370{
Len Brown6eb87fe2007-02-10 22:17:07 -0500371 return acpi_table_parse_entries(ACPI_SIG_MADT,
Len Brown4be44fc2005-08-05 00:44:28 -0400372 sizeof(struct acpi_table_madt), id,
373 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374}
375
Len Brown7f8f97c2007-02-10 21:28:03 -0500376/**
377 * acpi_table_parse - find table with @id, run @handler on it
Len Brown7f8f97c2007-02-10 21:28:03 -0500378 * @id: table id to find
379 * @handler: handler to run
380 *
381 * Scan the ACPI System Descriptor Table (STD) for a table matching @id,
tangchenf8a571b2014-01-06 16:47:59 +0800382 * run @handler on it.
383 *
384 * Return 0 if table found, -errno if not.
Len Brown7f8f97c2007-02-10 21:28:03 -0500385 */
Lv Zhengb43e1062013-01-12 15:29:38 +0000386int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387{
Alexey Starikovskiyceb6c462007-02-02 19:48:22 +0300388 struct acpi_table_header *table = NULL;
Yinghai Lu7d972772009-02-07 15:39:41 -0800389 acpi_size tbl_size;
Len Browna1fdcc02007-03-11 03:26:14 -0400390
Len Brown68ca4062010-02-19 00:09:22 -0500391 if (acpi_disabled)
Len Browne5b8fc62009-07-07 23:22:58 -0400392 return -ENODEV;
393
tangchende2d1a72014-01-06 16:43:54 +0800394 if (!id || !handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 return -EINVAL;
396
Len Browna1fdcc02007-03-11 03:26:14 -0400397 if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
Yinghai Lu7d972772009-02-07 15:39:41 -0800398 acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400399 else
Yinghai Lu7d972772009-02-07 15:39:41 -0800400 acpi_get_table_with_size(id, 0, &table, &tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400401
Alexey Starikovskiyceb6c462007-02-02 19:48:22 +0300402 if (table) {
403 handler(table);
Yinghai Lu7d972772009-02-07 15:39:41 -0800404 early_acpi_os_unmap_memory(table, tbl_size);
Alexey Starikovskiyceb6c462007-02-02 19:48:22 +0300405 return 0;
Len Brown7f8f97c2007-02-10 21:28:03 -0500406 } else
Hanjun Guo95df8122013-12-05 23:42:38 +0800407 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408}
409
Len Browna1fdcc02007-03-11 03:26:14 -0400410/*
411 * The BIOS is supposed to supply a single APIC/MADT,
412 * but some report two. Provide a knob to use either.
413 * (don't you wish instance 0 and 1 were not the same?)
414 */
415static void __init check_multiple_madt(void)
416{
417 struct acpi_table_header *table = NULL;
Yinghai Lu7d972772009-02-07 15:39:41 -0800418 acpi_size tbl_size;
Len Browna1fdcc02007-03-11 03:26:14 -0400419
Yinghai Lu7d972772009-02-07 15:39:41 -0800420 acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400421 if (table) {
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800422 pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n",
423 acpi_apic_instance);
424 pr_warn("If \"acpi_apic_instance=%d\" works better, "
425 "notify linux-acpi@vger.kernel.org\n",
426 acpi_apic_instance ? 0 : 2);
Yinghai Lu7d972772009-02-07 15:39:41 -0800427 early_acpi_os_unmap_memory(table, tbl_size);
Len Browna1fdcc02007-03-11 03:26:14 -0400428
429 } else
430 acpi_apic_instance = 0;
431
432 return;
433}
434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435/*
436 * acpi_table_init()
437 *
438 * find RSDP, find and checksum SDT/XSDT.
439 * checksum all tables, print SDT/XSDT
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300440 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 * result: sdt_entry[] is initialized
442 */
443
Len Brown4be44fc2005-08-05 00:44:28 -0400444int __init acpi_table_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445{
Len Brown9e3a9d12009-02-06 14:00:56 -0500446 acpi_status status;
447
Lv Zheng4fc0a7e2014-05-31 08:15:02 +0800448 if (acpi_verify_table_checksum) {
449 pr_info("Early table checksum verification enabled\n");
450 acpi_gbl_verify_table_checksum = TRUE;
451 } else {
452 pr_info("Early table checksum verification disabled\n");
453 acpi_gbl_verify_table_checksum = FALSE;
454 }
455
Len Brown9e3a9d12009-02-06 14:00:56 -0500456 status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
457 if (ACPI_FAILURE(status))
Hanjun Guo95df8122013-12-05 23:42:38 +0800458 return -EINVAL;
Len Brown9e3a9d12009-02-06 14:00:56 -0500459
Len Browna1fdcc02007-03-11 03:26:14 -0400460 check_multiple_madt();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 return 0;
462}
Len Browna1fdcc02007-03-11 03:26:14 -0400463
464static int __init acpi_parse_apic_instance(char *str)
465{
Cyrill Gorcunovf0df2d62008-08-20 16:41:45 -0700466 if (!str)
467 return -EINVAL;
Len Browna1fdcc02007-03-11 03:26:14 -0400468
Christoph Jaeger3d915892014-06-13 21:49:58 +0200469 if (kstrtoint(str, 0, &acpi_apic_instance))
470 return -EINVAL;
Len Browna1fdcc02007-03-11 03:26:14 -0400471
Hanjun Guo730bf5e2014-02-20 15:45:33 +0800472 pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance);
Len Browna1fdcc02007-03-11 03:26:14 -0400473
474 return 0;
475}
476
477early_param("acpi_apic_instance", acpi_parse_apic_instance);
Lv Zheng4fc0a7e2014-05-31 08:15:02 +0800478
479static int __init acpi_force_table_verification_setup(char *s)
480{
481 acpi_verify_table_checksum = true;
482
483 return 0;
484}
485
486early_param("acpi_force_table_verification", acpi_force_table_verification_setup);
Colin Ian Kingb2ca5da2016-01-21 17:05:47 +0000487
488static int __init acpi_force_32bit_fadt_addr(char *s)
489{
490 pr_info("Forcing 32 Bit FADT addresses\n");
491 acpi_gbl_use32_bit_fadt_addresses = TRUE;
492
493 return 0;
494}
495
496early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr);