Commit | Line | Data |
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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 | 46 | |
4fc0a7e8 LZ |
47 | /* |
48 | * Disable table checksum verification for the early stage due to the size | |
49 | * limitation of the current x86 early mapping implementation. | |
50 | */ | |
51 | static bool acpi_verify_table_checksum __initdata = false; | |
52 | ||
a1fdcc0d | 53 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
1da177e4 LT |
54 | { |
55 | if (!header) | |
56 | return; | |
57 | ||
58 | switch (header->type) { | |
59 | ||
5f3b1a8b | 60 | case ACPI_MADT_TYPE_LOCAL_APIC: |
4be44fcd | 61 | { |
5f3b1a8b AS |
62 | struct acpi_madt_local_apic *p = |
63 | (struct acpi_madt_local_apic *)header; | |
730bf5eb HG |
64 | pr_info("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
65 | p->processor_id, p->id, | |
66 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 67 | } |
1da177e4 LT |
68 | break; |
69 | ||
7237d3de SS |
70 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
71 | { | |
72 | struct acpi_madt_local_x2apic *p = | |
73 | (struct acpi_madt_local_x2apic *)header; | |
730bf5eb HG |
74 | pr_info("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
75 | p->local_apic_id, p->uid, | |
76 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
7237d3de SS |
77 | } |
78 | break; | |
79 | ||
5f3b1a8b | 80 | case ACPI_MADT_TYPE_IO_APIC: |
4be44fcd | 81 | { |
5f3b1a8b AS |
82 | struct acpi_madt_io_apic *p = |
83 | (struct acpi_madt_io_apic *)header; | |
730bf5eb HG |
84 | pr_info("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
85 | p->id, p->address, p->global_irq_base); | |
4be44fcd | 86 | } |
1da177e4 LT |
87 | break; |
88 | ||
5f3b1a8b | 89 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
4be44fcd | 90 | { |
5f3b1a8b AS |
91 | struct acpi_madt_interrupt_override *p = |
92 | (struct acpi_madt_interrupt_override *)header; | |
730bf5eb HG |
93 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
94 | p->bus, p->source_irq, p->global_irq, | |
95 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
96 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); | |
5f3b1a8b AS |
97 | if (p->inti_flags & |
98 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) | |
730bf5eb HG |
99 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
100 | p->inti_flags & | |
5f3b1a8b | 101 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
4be44fcd | 102 | } |
1da177e4 LT |
103 | break; |
104 | ||
5f3b1a8b | 105 | case ACPI_MADT_TYPE_NMI_SOURCE: |
4be44fcd | 106 | { |
5f3b1a8b AS |
107 | struct acpi_madt_nmi_source *p = |
108 | (struct acpi_madt_nmi_source *)header; | |
730bf5eb HG |
109 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
110 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
111 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
112 | p->global_irq); | |
4be44fcd | 113 | } |
1da177e4 LT |
114 | break; |
115 | ||
5f3b1a8b | 116 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
4be44fcd | 117 | { |
5f3b1a8b AS |
118 | struct acpi_madt_local_apic_nmi *p = |
119 | (struct acpi_madt_local_apic_nmi *)header; | |
730bf5eb HG |
120 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
121 | p->processor_id, | |
122 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], | |
123 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
124 | p->lint); | |
7237d3de SS |
125 | } |
126 | break; | |
127 | ||
128 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: | |
129 | { | |
130 | u16 polarity, trigger; | |
131 | struct acpi_madt_local_x2apic_nmi *p = | |
132 | (struct acpi_madt_local_x2apic_nmi *)header; | |
133 | ||
134 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; | |
135 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
136 | ||
730bf5eb HG |
137 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
138 | p->uid, | |
139 | mps_inti_flags_polarity[polarity], | |
140 | mps_inti_flags_trigger[trigger], | |
141 | p->lint); | |
4be44fcd | 142 | } |
1da177e4 LT |
143 | break; |
144 | ||
5f3b1a8b | 145 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
4be44fcd | 146 | { |
5f3b1a8b AS |
147 | struct acpi_madt_local_apic_override *p = |
148 | (struct acpi_madt_local_apic_override *)header; | |
730bf5eb HG |
149 | pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
150 | (void *)(unsigned long)p->address); | |
4be44fcd | 151 | } |
1da177e4 LT |
152 | break; |
153 | ||
5f3b1a8b | 154 | case ACPI_MADT_TYPE_IO_SAPIC: |
4be44fcd | 155 | { |
5f3b1a8b AS |
156 | struct acpi_madt_io_sapic *p = |
157 | (struct acpi_madt_io_sapic *)header; | |
730bf5eb HG |
158 | pr_info("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
159 | p->id, (void *)(unsigned long)p->address, | |
160 | p->global_irq_base); | |
4be44fcd | 161 | } |
1da177e4 LT |
162 | break; |
163 | ||
5f3b1a8b | 164 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
4be44fcd | 165 | { |
5f3b1a8b AS |
166 | struct acpi_madt_local_sapic *p = |
167 | (struct acpi_madt_local_sapic *)header; | |
730bf5eb HG |
168 | pr_info("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
169 | p->processor_id, p->id, p->eid, | |
170 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 171 | } |
1da177e4 LT |
172 | break; |
173 | ||
5f3b1a8b | 174 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
4be44fcd | 175 | { |
5f3b1a8b AS |
176 | struct acpi_madt_interrupt_source *p = |
177 | (struct acpi_madt_interrupt_source *)header; | |
730bf5eb HG |
178 | 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", |
179 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
180 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
181 | p->type, p->id, p->eid, p->io_sapic_vector, | |
182 | p->global_irq); | |
4be44fcd | 183 | } |
1da177e4 LT |
184 | break; |
185 | ||
186 | default: | |
730bf5eb HG |
187 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
188 | header->type); | |
1da177e4 LT |
189 | break; |
190 | } | |
191 | } | |
192 | ||
1da177e4 LT |
193 | |
194 | int __init | |
6eb87fed LB |
195 | acpi_table_parse_entries(char *id, |
196 | unsigned long table_size, | |
4be44fcd | 197 | int entry_id, |
b43e1065 | 198 | acpi_tbl_entry_handler handler, |
4be44fcd | 199 | unsigned int max_entries) |
1da177e4 | 200 | { |
6eb87fed | 201 | struct acpi_table_header *table_header = NULL; |
5f3b1a8b | 202 | struct acpi_subtable_header *entry; |
4be44fcd | 203 | unsigned int count = 0; |
6eb87fed | 204 | unsigned long table_end; |
7d97277b | 205 | acpi_size tbl_size; |
1da177e4 | 206 | |
68ca4069 | 207 | if (acpi_disabled) |
e5b8fc6a LB |
208 | return -ENODEV; |
209 | ||
1da177e4 LT |
210 | if (!handler) |
211 | return -EINVAL; | |
212 | ||
a1fdcc0d | 213 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
7d97277b | 214 | acpi_get_table_with_size(id, acpi_apic_instance, &table_header, &tbl_size); |
a1fdcc0d | 215 | else |
7d97277b | 216 | acpi_get_table_with_size(id, 0, &table_header, &tbl_size); |
1da177e4 | 217 | |
6eb87fed | 218 | if (!table_header) { |
730bf5eb | 219 | pr_warn("%4.4s not present\n", id); |
1da177e4 LT |
220 | return -ENODEV; |
221 | } | |
222 | ||
6eb87fed | 223 | table_end = (unsigned long)table_header + table_header->length; |
1da177e4 LT |
224 | |
225 | /* Parse all entries looking for a match. */ | |
226 | ||
5f3b1a8b | 227 | entry = (struct acpi_subtable_header *) |
6eb87fed | 228 | ((unsigned long)table_header + table_size); |
1da177e4 | 229 | |
5f3b1a8b | 230 | while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < |
6eb87fed | 231 | table_end) { |
4be44fcd LB |
232 | if (entry->type == entry_id |
233 | && (!max_entries || count++ < max_entries)) | |
369d913b FY |
234 | if (handler(entry, table_end)) |
235 | goto err; | |
236 | ||
237 | /* | |
238 | * If entry->length is 0, break from this loop to avoid | |
239 | * infinite loop. | |
240 | */ | |
241 | if (entry->length == 0) { | |
730bf5eb | 242 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, entry_id); |
369d913b FY |
243 | goto err; |
244 | } | |
1da177e4 | 245 | |
5f3b1a8b | 246 | entry = (struct acpi_subtable_header *) |
4be44fcd | 247 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
248 | } |
249 | if (max_entries && count > max_entries) { | |
730bf5eb HG |
250 | pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n", |
251 | id, entry_id, count - max_entries, count); | |
1da177e4 LT |
252 | } |
253 | ||
7d97277b | 254 | early_acpi_os_unmap_memory((char *)table_header, tbl_size); |
1da177e4 | 255 | return count; |
369d913b FY |
256 | err: |
257 | early_acpi_os_unmap_memory((char *)table_header, tbl_size); | |
258 | return -EINVAL; | |
1da177e4 LT |
259 | } |
260 | ||
1da177e4 | 261 | int __init |
5f3b1a8b | 262 | acpi_table_parse_madt(enum acpi_madt_type id, |
b43e1065 | 263 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
1da177e4 | 264 | { |
6eb87fed | 265 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
4be44fcd LB |
266 | sizeof(struct acpi_table_madt), id, |
267 | handler, max_entries); | |
1da177e4 LT |
268 | } |
269 | ||
7f8f97c3 LB |
270 | /** |
271 | * acpi_table_parse - find table with @id, run @handler on it | |
7f8f97c3 LB |
272 | * @id: table id to find |
273 | * @handler: handler to run | |
274 | * | |
275 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, | |
f8a571b2 | 276 | * run @handler on it. |
277 | * | |
278 | * Return 0 if table found, -errno if not. | |
7f8f97c3 | 279 | */ |
b43e1065 | 280 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
1da177e4 | 281 | { |
ceb6c468 | 282 | struct acpi_table_header *table = NULL; |
7d97277b | 283 | acpi_size tbl_size; |
a1fdcc0d | 284 | |
68ca4069 | 285 | if (acpi_disabled) |
e5b8fc6a LB |
286 | return -ENODEV; |
287 | ||
de2d1a7e | 288 | if (!id || !handler) |
1da177e4 LT |
289 | return -EINVAL; |
290 | ||
a1fdcc0d | 291 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
7d97277b | 292 | acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size); |
a1fdcc0d | 293 | else |
7d97277b | 294 | acpi_get_table_with_size(id, 0, &table, &tbl_size); |
a1fdcc0d | 295 | |
ceb6c468 AS |
296 | if (table) { |
297 | handler(table); | |
7d97277b | 298 | early_acpi_os_unmap_memory(table, tbl_size); |
ceb6c468 | 299 | return 0; |
7f8f97c3 | 300 | } else |
95df812d | 301 | return -ENODEV; |
1da177e4 LT |
302 | } |
303 | ||
a1fdcc0d LB |
304 | /* |
305 | * The BIOS is supposed to supply a single APIC/MADT, | |
306 | * but some report two. Provide a knob to use either. | |
307 | * (don't you wish instance 0 and 1 were not the same?) | |
308 | */ | |
309 | static void __init check_multiple_madt(void) | |
310 | { | |
311 | struct acpi_table_header *table = NULL; | |
7d97277b | 312 | acpi_size tbl_size; |
a1fdcc0d | 313 | |
7d97277b | 314 | acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size); |
a1fdcc0d | 315 | if (table) { |
730bf5eb HG |
316 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
317 | acpi_apic_instance); | |
318 | pr_warn("If \"acpi_apic_instance=%d\" works better, " | |
319 | "notify linux-acpi@vger.kernel.org\n", | |
320 | acpi_apic_instance ? 0 : 2); | |
7d97277b | 321 | early_acpi_os_unmap_memory(table, tbl_size); |
a1fdcc0d LB |
322 | |
323 | } else | |
324 | acpi_apic_instance = 0; | |
325 | ||
326 | return; | |
327 | } | |
328 | ||
1da177e4 LT |
329 | /* |
330 | * acpi_table_init() | |
331 | * | |
332 | * find RSDP, find and checksum SDT/XSDT. | |
333 | * checksum all tables, print SDT/XSDT | |
5f3b1a8b | 334 | * |
1da177e4 LT |
335 | * result: sdt_entry[] is initialized |
336 | */ | |
337 | ||
4be44fcd | 338 | int __init acpi_table_init(void) |
1da177e4 | 339 | { |
9e3a9d1e LB |
340 | acpi_status status; |
341 | ||
4fc0a7e8 LZ |
342 | if (acpi_verify_table_checksum) { |
343 | pr_info("Early table checksum verification enabled\n"); | |
344 | acpi_gbl_verify_table_checksum = TRUE; | |
345 | } else { | |
346 | pr_info("Early table checksum verification disabled\n"); | |
347 | acpi_gbl_verify_table_checksum = FALSE; | |
348 | } | |
349 | ||
9e3a9d1e LB |
350 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
351 | if (ACPI_FAILURE(status)) | |
95df812d | 352 | return -EINVAL; |
9e3a9d1e | 353 | |
a1fdcc0d LB |
354 | check_multiple_madt(); |
355 | return 0; | |
356 | } | |
357 | ||
358 | static int __init acpi_parse_apic_instance(char *str) | |
359 | { | |
f0df2d6b CG |
360 | if (!str) |
361 | return -EINVAL; | |
a1fdcc0d | 362 | |
3d915894 CJ |
363 | if (kstrtoint(str, 0, &acpi_apic_instance)) |
364 | return -EINVAL; | |
a1fdcc0d | 365 | |
730bf5eb | 366 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
a1fdcc0d | 367 | |
1da177e4 LT |
368 | return 0; |
369 | } | |
a1fdcc0d LB |
370 | |
371 | early_param("acpi_apic_instance", acpi_parse_apic_instance); | |
4fc0a7e8 LZ |
372 | |
373 | static int __init acpi_force_table_verification_setup(char *s) | |
374 | { | |
375 | acpi_verify_table_checksum = true; | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | early_param("acpi_force_table_verification", acpi_force_table_verification_setup); |