]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
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 | ||
730bf5eb HG |
26 | #define pr_fmt(fmt) "ACPI: " fmt |
27 | ||
1da177e4 LT |
28 | #include <linux/init.h> |
29 | #include <linux/kernel.h> | |
1da177e4 LT |
30 | #include <linux/smp.h> |
31 | #include <linux/string.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/irq.h> | |
34 | #include <linux/errno.h> | |
35 | #include <linux/acpi.h> | |
36 | #include <linux/bootmem.h> | |
37 | ||
04348e69 | 38 | #define ACPI_MAX_TABLES 128 |
1da177e4 | 39 | |
1da177e4 LT |
40 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
41 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; | |
42 | ||
ad71860a | 43 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
1da177e4 | 44 | |
4e381a4f | 45 | static int acpi_apic_instance __initdata; |
a1fdcc0d LB |
46 | |
47 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) | |
1da177e4 LT |
48 | { |
49 | if (!header) | |
50 | return; | |
51 | ||
52 | switch (header->type) { | |
53 | ||
5f3b1a8b | 54 | case ACPI_MADT_TYPE_LOCAL_APIC: |
4be44fcd | 55 | { |
5f3b1a8b AS |
56 | struct acpi_madt_local_apic *p = |
57 | (struct acpi_madt_local_apic *)header; | |
730bf5eb HG |
58 | pr_info("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
59 | p->processor_id, p->id, | |
60 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 61 | } |
1da177e4 LT |
62 | break; |
63 | ||
7237d3de SS |
64 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
65 | { | |
66 | struct acpi_madt_local_x2apic *p = | |
67 | (struct acpi_madt_local_x2apic *)header; | |
730bf5eb HG |
68 | pr_info("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
69 | p->local_apic_id, p->uid, | |
70 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
7237d3de SS |
71 | } |
72 | break; | |
73 | ||
5f3b1a8b | 74 | case ACPI_MADT_TYPE_IO_APIC: |
4be44fcd | 75 | { |
5f3b1a8b AS |
76 | struct acpi_madt_io_apic *p = |
77 | (struct acpi_madt_io_apic *)header; | |
730bf5eb HG |
78 | pr_info("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
79 | p->id, p->address, p->global_irq_base); | |
4be44fcd | 80 | } |
1da177e4 LT |
81 | break; |
82 | ||
5f3b1a8b | 83 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
4be44fcd | 84 | { |
5f3b1a8b AS |
85 | struct acpi_madt_interrupt_override *p = |
86 | (struct acpi_madt_interrupt_override *)header; | |
730bf5eb HG |
87 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
88 | p->bus, p->source_irq, p->global_irq, | |
89 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
90 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); | |
5f3b1a8b AS |
91 | if (p->inti_flags & |
92 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) | |
730bf5eb HG |
93 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
94 | p->inti_flags & | |
5f3b1a8b | 95 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
4be44fcd | 96 | } |
1da177e4 LT |
97 | break; |
98 | ||
5f3b1a8b | 99 | case ACPI_MADT_TYPE_NMI_SOURCE: |
4be44fcd | 100 | { |
5f3b1a8b AS |
101 | struct acpi_madt_nmi_source *p = |
102 | (struct acpi_madt_nmi_source *)header; | |
730bf5eb HG |
103 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
104 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
105 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
106 | p->global_irq); | |
4be44fcd | 107 | } |
1da177e4 LT |
108 | break; |
109 | ||
5f3b1a8b | 110 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
4be44fcd | 111 | { |
5f3b1a8b AS |
112 | struct acpi_madt_local_apic_nmi *p = |
113 | (struct acpi_madt_local_apic_nmi *)header; | |
730bf5eb HG |
114 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
115 | p->processor_id, | |
116 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], | |
117 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
118 | p->lint); | |
7237d3de SS |
119 | } |
120 | break; | |
121 | ||
122 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: | |
123 | { | |
124 | u16 polarity, trigger; | |
125 | struct acpi_madt_local_x2apic_nmi *p = | |
126 | (struct acpi_madt_local_x2apic_nmi *)header; | |
127 | ||
128 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; | |
129 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
130 | ||
730bf5eb HG |
131 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
132 | p->uid, | |
133 | mps_inti_flags_polarity[polarity], | |
134 | mps_inti_flags_trigger[trigger], | |
135 | p->lint); | |
4be44fcd | 136 | } |
1da177e4 LT |
137 | break; |
138 | ||
5f3b1a8b | 139 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
4be44fcd | 140 | { |
5f3b1a8b AS |
141 | struct acpi_madt_local_apic_override *p = |
142 | (struct acpi_madt_local_apic_override *)header; | |
730bf5eb HG |
143 | pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
144 | (void *)(unsigned long)p->address); | |
4be44fcd | 145 | } |
1da177e4 LT |
146 | break; |
147 | ||
5f3b1a8b | 148 | case ACPI_MADT_TYPE_IO_SAPIC: |
4be44fcd | 149 | { |
5f3b1a8b AS |
150 | struct acpi_madt_io_sapic *p = |
151 | (struct acpi_madt_io_sapic *)header; | |
730bf5eb HG |
152 | pr_info("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
153 | p->id, (void *)(unsigned long)p->address, | |
154 | p->global_irq_base); | |
4be44fcd | 155 | } |
1da177e4 LT |
156 | break; |
157 | ||
5f3b1a8b | 158 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
4be44fcd | 159 | { |
5f3b1a8b AS |
160 | struct acpi_madt_local_sapic *p = |
161 | (struct acpi_madt_local_sapic *)header; | |
730bf5eb HG |
162 | pr_info("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
163 | p->processor_id, p->id, p->eid, | |
164 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 165 | } |
1da177e4 LT |
166 | break; |
167 | ||
5f3b1a8b | 168 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
4be44fcd | 169 | { |
5f3b1a8b AS |
170 | struct acpi_madt_interrupt_source *p = |
171 | (struct acpi_madt_interrupt_source *)header; | |
730bf5eb HG |
172 | 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", |
173 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
174 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
175 | p->type, p->id, p->eid, p->io_sapic_vector, | |
176 | p->global_irq); | |
4be44fcd | 177 | } |
1da177e4 LT |
178 | break; |
179 | ||
180 | default: | |
730bf5eb HG |
181 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
182 | header->type); | |
1da177e4 LT |
183 | break; |
184 | } | |
185 | } | |
186 | ||
1da177e4 LT |
187 | |
188 | int __init | |
6eb87fed LB |
189 | acpi_table_parse_entries(char *id, |
190 | unsigned long table_size, | |
4be44fcd | 191 | int entry_id, |
b43e1065 | 192 | acpi_tbl_entry_handler handler, |
4be44fcd | 193 | unsigned int max_entries) |
1da177e4 | 194 | { |
6eb87fed | 195 | struct acpi_table_header *table_header = NULL; |
5f3b1a8b | 196 | struct acpi_subtable_header *entry; |
4be44fcd | 197 | unsigned int count = 0; |
6eb87fed | 198 | unsigned long table_end; |
7d97277b | 199 | acpi_size tbl_size; |
1da177e4 | 200 | |
68ca4069 | 201 | if (acpi_disabled) |
e5b8fc6a LB |
202 | return -ENODEV; |
203 | ||
1da177e4 LT |
204 | if (!handler) |
205 | return -EINVAL; | |
206 | ||
a1fdcc0d | 207 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
7d97277b | 208 | acpi_get_table_with_size(id, acpi_apic_instance, &table_header, &tbl_size); |
a1fdcc0d | 209 | else |
7d97277b | 210 | acpi_get_table_with_size(id, 0, &table_header, &tbl_size); |
1da177e4 | 211 | |
6eb87fed | 212 | if (!table_header) { |
730bf5eb | 213 | pr_warn("%4.4s not present\n", id); |
1da177e4 LT |
214 | return -ENODEV; |
215 | } | |
216 | ||
6eb87fed | 217 | table_end = (unsigned long)table_header + table_header->length; |
1da177e4 LT |
218 | |
219 | /* Parse all entries looking for a match. */ | |
220 | ||
5f3b1a8b | 221 | entry = (struct acpi_subtable_header *) |
6eb87fed | 222 | ((unsigned long)table_header + table_size); |
1da177e4 | 223 | |
5f3b1a8b | 224 | while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < |
6eb87fed | 225 | table_end) { |
4be44fcd LB |
226 | if (entry->type == entry_id |
227 | && (!max_entries || count++ < max_entries)) | |
369d913b FY |
228 | if (handler(entry, table_end)) |
229 | goto err; | |
230 | ||
231 | /* | |
232 | * If entry->length is 0, break from this loop to avoid | |
233 | * infinite loop. | |
234 | */ | |
235 | if (entry->length == 0) { | |
730bf5eb | 236 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, entry_id); |
369d913b FY |
237 | goto err; |
238 | } | |
1da177e4 | 239 | |
5f3b1a8b | 240 | entry = (struct acpi_subtable_header *) |
4be44fcd | 241 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
242 | } |
243 | if (max_entries && count > max_entries) { | |
730bf5eb HG |
244 | pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n", |
245 | id, entry_id, count - max_entries, count); | |
1da177e4 LT |
246 | } |
247 | ||
7d97277b | 248 | early_acpi_os_unmap_memory((char *)table_header, tbl_size); |
1da177e4 | 249 | return count; |
369d913b FY |
250 | err: |
251 | early_acpi_os_unmap_memory((char *)table_header, tbl_size); | |
252 | return -EINVAL; | |
1da177e4 LT |
253 | } |
254 | ||
1da177e4 | 255 | int __init |
5f3b1a8b | 256 | acpi_table_parse_madt(enum acpi_madt_type id, |
b43e1065 | 257 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
1da177e4 | 258 | { |
6eb87fed | 259 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
4be44fcd LB |
260 | sizeof(struct acpi_table_madt), id, |
261 | handler, max_entries); | |
1da177e4 LT |
262 | } |
263 | ||
7f8f97c3 LB |
264 | /** |
265 | * acpi_table_parse - find table with @id, run @handler on it | |
7f8f97c3 LB |
266 | * @id: table id to find |
267 | * @handler: handler to run | |
268 | * | |
269 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, | |
f8a571b2 | 270 | * run @handler on it. |
271 | * | |
272 | * Return 0 if table found, -errno if not. | |
7f8f97c3 | 273 | */ |
b43e1065 | 274 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
1da177e4 | 275 | { |
ceb6c468 | 276 | struct acpi_table_header *table = NULL; |
7d97277b | 277 | acpi_size tbl_size; |
a1fdcc0d | 278 | |
68ca4069 | 279 | if (acpi_disabled) |
e5b8fc6a LB |
280 | return -ENODEV; |
281 | ||
de2d1a7e | 282 | if (!id || !handler) |
1da177e4 LT |
283 | return -EINVAL; |
284 | ||
a1fdcc0d | 285 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
7d97277b | 286 | acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size); |
a1fdcc0d | 287 | else |
7d97277b | 288 | acpi_get_table_with_size(id, 0, &table, &tbl_size); |
a1fdcc0d | 289 | |
ceb6c468 AS |
290 | if (table) { |
291 | handler(table); | |
7d97277b | 292 | early_acpi_os_unmap_memory(table, tbl_size); |
ceb6c468 | 293 | return 0; |
7f8f97c3 | 294 | } else |
95df812d | 295 | return -ENODEV; |
1da177e4 LT |
296 | } |
297 | ||
a1fdcc0d LB |
298 | /* |
299 | * The BIOS is supposed to supply a single APIC/MADT, | |
300 | * but some report two. Provide a knob to use either. | |
301 | * (don't you wish instance 0 and 1 were not the same?) | |
302 | */ | |
303 | static void __init check_multiple_madt(void) | |
304 | { | |
305 | struct acpi_table_header *table = NULL; | |
7d97277b | 306 | acpi_size tbl_size; |
a1fdcc0d | 307 | |
7d97277b | 308 | acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size); |
a1fdcc0d | 309 | if (table) { |
730bf5eb HG |
310 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
311 | acpi_apic_instance); | |
312 | pr_warn("If \"acpi_apic_instance=%d\" works better, " | |
313 | "notify linux-acpi@vger.kernel.org\n", | |
314 | acpi_apic_instance ? 0 : 2); | |
7d97277b | 315 | early_acpi_os_unmap_memory(table, tbl_size); |
a1fdcc0d LB |
316 | |
317 | } else | |
318 | acpi_apic_instance = 0; | |
319 | ||
320 | return; | |
321 | } | |
322 | ||
1da177e4 LT |
323 | /* |
324 | * acpi_table_init() | |
325 | * | |
326 | * find RSDP, find and checksum SDT/XSDT. | |
327 | * checksum all tables, print SDT/XSDT | |
5f3b1a8b | 328 | * |
1da177e4 LT |
329 | * result: sdt_entry[] is initialized |
330 | */ | |
331 | ||
4be44fcd | 332 | int __init acpi_table_init(void) |
1da177e4 | 333 | { |
9e3a9d1e LB |
334 | acpi_status status; |
335 | ||
336 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); | |
337 | if (ACPI_FAILURE(status)) | |
95df812d | 338 | return -EINVAL; |
9e3a9d1e | 339 | |
a1fdcc0d LB |
340 | check_multiple_madt(); |
341 | return 0; | |
342 | } | |
343 | ||
344 | static int __init acpi_parse_apic_instance(char *str) | |
345 | { | |
f0df2d6b CG |
346 | if (!str) |
347 | return -EINVAL; | |
a1fdcc0d LB |
348 | |
349 | acpi_apic_instance = simple_strtoul(str, NULL, 0); | |
350 | ||
730bf5eb | 351 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
a1fdcc0d | 352 | |
1da177e4 LT |
353 | return 0; |
354 | } | |
a1fdcc0d LB |
355 | |
356 | early_param("acpi_apic_instance", acpi_parse_apic_instance); |