Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 19 | * |
| 20 | */ |
| 21 | |
Hanjun Guo | 07f438d | 2015-03-24 14:02:34 +0000 | [diff] [blame] | 22 | /* Uncomment next line to get verbose printout */ |
| 23 | /* #define DEBUG */ |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 24 | #define pr_fmt(fmt) "ACPI: " fmt |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/init.h> |
| 27 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #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> |
Lv Zheng | 5ae74f2c | 2016-04-11 10:13:18 +0800 | [diff] [blame^] | 35 | #include <linux/earlycpio.h> |
| 36 | #include <linux/memblock.h> |
Lv Zheng | c85cc81 | 2016-03-02 14:16:25 +0800 | [diff] [blame] | 37 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Len Brown | 04348e6 | 2005-12-30 02:44:59 -0500 | [diff] [blame] | 39 | #define ACPI_MAX_TABLES 128 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
| 42 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; |
| 43 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 44 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Len Brown | 4e381a4 | 2007-03-30 14:16:10 -0400 | [diff] [blame] | 46 | static int acpi_apic_instance __initdata; |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 47 | |
Lv Zheng | 4fc0a7e | 2014-05-31 08:15:02 +0800 | [diff] [blame] | 48 | /* |
| 49 | * Disable table checksum verification for the early stage due to the size |
| 50 | * limitation of the current x86 early mapping implementation. |
| 51 | */ |
| 52 | static bool acpi_verify_table_checksum __initdata = false; |
| 53 | |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 54 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | { |
| 56 | if (!header) |
| 57 | return; |
| 58 | |
| 59 | switch (header->type) { |
| 60 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 61 | case ACPI_MADT_TYPE_LOCAL_APIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 62 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 63 | struct acpi_madt_local_apic *p = |
| 64 | (struct acpi_madt_local_apic *)header; |
Hanjun Guo | 07f438d | 2015-03-24 14:02:34 +0000 | [diff] [blame] | 65 | pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
| 66 | p->processor_id, p->id, |
| 67 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 68 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | break; |
| 70 | |
Suresh Siddha | 7237d3d | 2009-03-30 13:55:30 -0800 | [diff] [blame] | 71 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
| 72 | { |
| 73 | struct acpi_madt_local_x2apic *p = |
| 74 | (struct acpi_madt_local_x2apic *)header; |
Hanjun Guo | 07f438d | 2015-03-24 14:02:34 +0000 | [diff] [blame] | 75 | pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
| 76 | p->local_apic_id, p->uid, |
| 77 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
Suresh Siddha | 7237d3d | 2009-03-30 13:55:30 -0800 | [diff] [blame] | 78 | } |
| 79 | break; |
| 80 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 81 | case ACPI_MADT_TYPE_IO_APIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 82 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 83 | struct acpi_madt_io_apic *p = |
| 84 | (struct acpi_madt_io_apic *)header; |
Hanjun Guo | 07f438d | 2015-03-24 14:02:34 +0000 | [diff] [blame] | 85 | pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
| 86 | p->id, p->address, p->global_irq_base); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 87 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | break; |
| 89 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 90 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 91 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 92 | struct acpi_madt_interrupt_override *p = |
| 93 | (struct acpi_madt_interrupt_override *)header; |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 94 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
| 95 | p->bus, p->source_irq, p->global_irq, |
| 96 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| 97 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 98 | if (p->inti_flags & |
| 99 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 100 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
| 101 | p->inti_flags & |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 102 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | break; |
| 105 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 106 | case ACPI_MADT_TYPE_NMI_SOURCE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 107 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 108 | struct acpi_madt_nmi_source *p = |
| 109 | (struct acpi_madt_nmi_source *)header; |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 110 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
| 111 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| 112 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
| 113 | p->global_irq); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 114 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | break; |
| 116 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 117 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 118 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 119 | struct acpi_madt_local_apic_nmi *p = |
| 120 | (struct acpi_madt_local_apic_nmi *)header; |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 121 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
| 122 | p->processor_id, |
| 123 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], |
| 124 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
| 125 | p->lint); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | break; |
| 128 | |
Suresh Siddha | 7237d3d | 2009-03-30 13:55:30 -0800 | [diff] [blame] | 129 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: |
| 130 | { |
| 131 | u16 polarity, trigger; |
| 132 | struct acpi_madt_local_x2apic_nmi *p = |
| 133 | (struct acpi_madt_local_x2apic_nmi *)header; |
| 134 | |
| 135 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; |
| 136 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; |
| 137 | |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 138 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
| 139 | p->uid, |
| 140 | mps_inti_flags_polarity[polarity], |
| 141 | mps_inti_flags_trigger[trigger], |
| 142 | p->lint); |
Suresh Siddha | 7237d3d | 2009-03-30 13:55:30 -0800 | [diff] [blame] | 143 | } |
| 144 | break; |
| 145 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 146 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 147 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 148 | struct acpi_madt_local_apic_override *p = |
| 149 | (struct acpi_madt_local_apic_override *)header; |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 150 | pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
| 151 | (void *)(unsigned long)p->address); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 152 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | break; |
| 154 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 155 | case ACPI_MADT_TYPE_IO_SAPIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 156 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 157 | struct acpi_madt_io_sapic *p = |
| 158 | (struct acpi_madt_io_sapic *)header; |
Hanjun Guo | 07f438d | 2015-03-24 14:02:34 +0000 | [diff] [blame] | 159 | pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
| 160 | p->id, (void *)(unsigned long)p->address, |
| 161 | p->global_irq_base); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 162 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | break; |
| 164 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 165 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 166 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 167 | struct acpi_madt_local_sapic *p = |
| 168 | (struct acpi_madt_local_sapic *)header; |
Hanjun Guo | 07f438d | 2015-03-24 14:02:34 +0000 | [diff] [blame] | 169 | pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
| 170 | p->processor_id, p->id, p->eid, |
| 171 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 172 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | break; |
| 174 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 175 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 176 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 177 | struct acpi_madt_interrupt_source *p = |
| 178 | (struct acpi_madt_interrupt_source *)header; |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 179 | 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", |
| 180 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| 181 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
| 182 | p->type, p->id, p->eid, p->io_sapic_vector, |
| 183 | p->global_irq); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 184 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | break; |
| 186 | |
Hanjun Guo | 4c1c8d7 | 2015-03-24 14:02:44 +0000 | [diff] [blame] | 187 | case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
| 188 | { |
| 189 | struct acpi_madt_generic_interrupt *p = |
| 190 | (struct acpi_madt_generic_interrupt *)header; |
| 191 | pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", |
| 192 | p->uid, p->base_address, |
| 193 | p->arm_mpidr, |
| 194 | (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
| 195 | |
| 196 | } |
| 197 | break; |
| 198 | |
| 199 | case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: |
| 200 | { |
| 201 | struct acpi_madt_generic_distributor *p = |
| 202 | (struct acpi_madt_generic_distributor *)header; |
| 203 | pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", |
| 204 | p->gic_id, p->base_address, |
| 205 | p->global_irq_base); |
| 206 | } |
| 207 | break; |
| 208 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | default: |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 210 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
| 211 | header->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | break; |
| 213 | } |
| 214 | } |
| 215 | |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 216 | /** |
| 217 | * acpi_parse_entries_array - for each proc_num find a suitable subtable |
| 218 | * |
| 219 | * @id: table id (for debugging purposes) |
| 220 | * @table_size: single entry size |
| 221 | * @table_header: where does the table start? |
| 222 | * @proc: array of acpi_subtable_proc struct containing entry id |
| 223 | * and associated handler with it |
| 224 | * @proc_num: how big proc is? |
| 225 | * @max_entries: how many entries can we process? |
| 226 | * |
| 227 | * For each proc_num find a subtable with proc->id and run proc->handler |
| 228 | * on it. Assumption is that there's only single handler for particular |
| 229 | * entry id. |
| 230 | * |
| 231 | * On success returns sum of all matching entries for all proc handlers. |
| 232 | * Otherwise, -ENODEV or -EINVAL is returned. |
| 233 | */ |
| 234 | static int __init |
| 235 | acpi_parse_entries_array(char *id, unsigned long table_size, |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 236 | struct acpi_table_header *table_header, |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 237 | struct acpi_subtable_proc *proc, int proc_num, |
| 238 | unsigned int max_entries) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 240 | struct acpi_subtable_header *entry; |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 241 | unsigned long table_end; |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 242 | int count = 0; |
| 243 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
Len Brown | 68ca406 | 2010-02-19 00:09:22 -0500 | [diff] [blame] | 245 | if (acpi_disabled) |
Len Brown | e5b8fc6 | 2009-07-07 23:22:58 -0400 | [diff] [blame] | 246 | return -ENODEV; |
| 247 | |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 248 | if (!id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | return -EINVAL; |
| 250 | |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 251 | if (!table_size) |
| 252 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 254 | if (!table_header) { |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 255 | pr_warn("%4.4s not present\n", id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | return -ENODEV; |
| 257 | } |
| 258 | |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 259 | table_end = (unsigned long)table_header + table_header->length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
| 261 | /* Parse all entries looking for a match. */ |
| 262 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 263 | entry = (struct acpi_subtable_header *) |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 264 | ((unsigned long)table_header + table_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 266 | while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 267 | table_end) { |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 268 | if (max_entries && count >= max_entries) |
| 269 | break; |
| 270 | |
| 271 | for (i = 0; i < proc_num; i++) { |
| 272 | if (entry->type != proc[i].id) |
| 273 | continue; |
Dan Carpenter | 362414d | 2015-09-22 15:29:25 +0300 | [diff] [blame] | 274 | if (!proc[i].handler || |
| 275 | proc[i].handler(entry, table_end)) |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 276 | return -EINVAL; |
Fenghua Yu | 369d913 | 2012-09-25 11:11:43 -0700 | [diff] [blame] | 277 | |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 278 | proc->count++; |
| 279 | break; |
Tomasz Nowicki | 4ceacd0 | 2014-11-26 22:01:14 +0800 | [diff] [blame] | 280 | } |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 281 | if (i != proc_num) |
| 282 | count++; |
Tomasz Nowicki | 4ceacd0 | 2014-11-26 22:01:14 +0800 | [diff] [blame] | 283 | |
Fenghua Yu | 369d913 | 2012-09-25 11:11:43 -0700 | [diff] [blame] | 284 | /* |
| 285 | * If entry->length is 0, break from this loop to avoid |
| 286 | * infinite loop. |
| 287 | */ |
| 288 | if (entry->length == 0) { |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 289 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 290 | return -EINVAL; |
Fenghua Yu | 369d913 | 2012-09-25 11:11:43 -0700 | [diff] [blame] | 291 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 293 | entry = (struct acpi_subtable_header *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 294 | ((unsigned long)entry + entry->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | } |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | if (max_entries && count > max_entries) { |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 298 | pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n", |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 299 | id, proc->id, count - max_entries, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 302 | return count; |
| 303 | } |
| 304 | |
| 305 | int __init |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 306 | acpi_parse_entries(char *id, |
| 307 | unsigned long table_size, |
| 308 | acpi_tbl_entry_handler handler, |
| 309 | struct acpi_table_header *table_header, |
| 310 | int entry_id, unsigned int max_entries) |
| 311 | { |
| 312 | struct acpi_subtable_proc proc = { |
| 313 | .id = entry_id, |
| 314 | .handler = handler, |
| 315 | }; |
| 316 | |
| 317 | return acpi_parse_entries_array(id, table_size, table_header, |
| 318 | &proc, 1, max_entries); |
| 319 | } |
| 320 | |
| 321 | int __init |
| 322 | acpi_table_parse_entries_array(char *id, |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 323 | unsigned long table_size, |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 324 | struct acpi_subtable_proc *proc, int proc_num, |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 325 | unsigned int max_entries) |
| 326 | { |
| 327 | struct acpi_table_header *table_header = NULL; |
| 328 | acpi_size tbl_size; |
| 329 | int count; |
| 330 | u32 instance = 0; |
| 331 | |
| 332 | if (acpi_disabled) |
| 333 | return -ENODEV; |
| 334 | |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 335 | if (!id) |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 336 | return -EINVAL; |
| 337 | |
| 338 | if (!strncmp(id, ACPI_SIG_MADT, 4)) |
| 339 | instance = acpi_apic_instance; |
| 340 | |
| 341 | acpi_get_table_with_size(id, instance, &table_header, &tbl_size); |
| 342 | if (!table_header) { |
| 343 | pr_warn("%4.4s not present\n", id); |
| 344 | return -ENODEV; |
| 345 | } |
| 346 | |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 347 | count = acpi_parse_entries_array(id, table_size, table_header, |
| 348 | proc, proc_num, max_entries); |
Ashwin Chaugule | f08bb47 | 2014-11-26 22:01:13 +0800 | [diff] [blame] | 349 | |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame] | 350 | early_acpi_os_unmap_memory((char *)table_header, tbl_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | return count; |
| 352 | } |
| 353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | int __init |
Lukasz Anaczkowski | 9b3fedd | 2015-09-09 15:47:28 +0200 | [diff] [blame] | 355 | acpi_table_parse_entries(char *id, |
| 356 | unsigned long table_size, |
| 357 | int entry_id, |
| 358 | acpi_tbl_entry_handler handler, |
| 359 | unsigned int max_entries) |
| 360 | { |
| 361 | struct acpi_subtable_proc proc = { |
| 362 | .id = entry_id, |
| 363 | .handler = handler, |
| 364 | }; |
| 365 | |
| 366 | return acpi_table_parse_entries_array(id, table_size, &proc, 1, |
| 367 | max_entries); |
| 368 | } |
| 369 | |
| 370 | int __init |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 371 | acpi_table_parse_madt(enum acpi_madt_type id, |
Lv Zheng | b43e106 | 2013-01-12 15:29:38 +0000 | [diff] [blame] | 372 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | { |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 374 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 375 | sizeof(struct acpi_table_madt), id, |
| 376 | handler, max_entries); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } |
| 378 | |
Len Brown | 7f8f97c | 2007-02-10 21:28:03 -0500 | [diff] [blame] | 379 | /** |
| 380 | * acpi_table_parse - find table with @id, run @handler on it |
Len Brown | 7f8f97c | 2007-02-10 21:28:03 -0500 | [diff] [blame] | 381 | * @id: table id to find |
| 382 | * @handler: handler to run |
| 383 | * |
| 384 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, |
tangchen | f8a571b | 2014-01-06 16:47:59 +0800 | [diff] [blame] | 385 | * run @handler on it. |
| 386 | * |
| 387 | * Return 0 if table found, -errno if not. |
Len Brown | 7f8f97c | 2007-02-10 21:28:03 -0500 | [diff] [blame] | 388 | */ |
Lv Zheng | b43e106 | 2013-01-12 15:29:38 +0000 | [diff] [blame] | 389 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | { |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 391 | struct acpi_table_header *table = NULL; |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame] | 392 | acpi_size tbl_size; |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 393 | |
Len Brown | 68ca406 | 2010-02-19 00:09:22 -0500 | [diff] [blame] | 394 | if (acpi_disabled) |
Len Brown | e5b8fc6 | 2009-07-07 23:22:58 -0400 | [diff] [blame] | 395 | return -ENODEV; |
| 396 | |
tangchen | de2d1a7 | 2014-01-06 16:43:54 +0800 | [diff] [blame] | 397 | if (!id || !handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | return -EINVAL; |
| 399 | |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 400 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame] | 401 | acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size); |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 402 | else |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame] | 403 | acpi_get_table_with_size(id, 0, &table, &tbl_size); |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 404 | |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 405 | if (table) { |
| 406 | handler(table); |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame] | 407 | early_acpi_os_unmap_memory(table, tbl_size); |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 408 | return 0; |
Len Brown | 7f8f97c | 2007-02-10 21:28:03 -0500 | [diff] [blame] | 409 | } else |
Hanjun Guo | 95df812 | 2013-12-05 23:42:38 +0800 | [diff] [blame] | 410 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 413 | /* |
| 414 | * The BIOS is supposed to supply a single APIC/MADT, |
| 415 | * but some report two. Provide a knob to use either. |
| 416 | * (don't you wish instance 0 and 1 were not the same?) |
| 417 | */ |
| 418 | static void __init check_multiple_madt(void) |
| 419 | { |
| 420 | struct acpi_table_header *table = NULL; |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame] | 421 | acpi_size tbl_size; |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 422 | |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame] | 423 | acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size); |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 424 | if (table) { |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 425 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
| 426 | acpi_apic_instance); |
| 427 | pr_warn("If \"acpi_apic_instance=%d\" works better, " |
| 428 | "notify linux-acpi@vger.kernel.org\n", |
| 429 | acpi_apic_instance ? 0 : 2); |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame] | 430 | early_acpi_os_unmap_memory(table, tbl_size); |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 431 | |
| 432 | } else |
| 433 | acpi_apic_instance = 0; |
| 434 | |
| 435 | return; |
| 436 | } |
| 437 | |
Lv Zheng | 5ae74f2c | 2016-04-11 10:13:18 +0800 | [diff] [blame^] | 438 | static void acpi_table_taint(struct acpi_table_header *table) |
| 439 | { |
| 440 | pr_warn("Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", |
| 441 | table->signature, table->oem_table_id); |
| 442 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
| 443 | } |
| 444 | |
| 445 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
| 446 | static u64 acpi_tables_addr; |
| 447 | static int all_tables_size; |
| 448 | |
| 449 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ |
| 450 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
| 451 | { |
| 452 | u8 sum = 0; |
| 453 | u8 *end = buffer + length; |
| 454 | |
| 455 | while (buffer < end) |
| 456 | sum = (u8) (sum + *(buffer++)); |
| 457 | return sum; |
| 458 | } |
| 459 | |
| 460 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ |
| 461 | static const char * const table_sigs[] = { |
| 462 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, |
| 463 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, |
| 464 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, |
| 465 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, |
| 466 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, |
| 467 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, |
| 468 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, |
| 469 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, |
| 470 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; |
| 471 | |
| 472 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
| 473 | |
| 474 | #define ACPI_OVERRIDE_TABLES 64 |
| 475 | static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; |
| 476 | static DECLARE_BITMAP(acpi_initrd_installed, ACPI_OVERRIDE_TABLES); |
| 477 | |
| 478 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) |
| 479 | |
| 480 | static void __init acpi_table_initrd_init(void *data, size_t size) |
| 481 | { |
| 482 | int sig, no, table_nr = 0, total_offset = 0; |
| 483 | long offset = 0; |
| 484 | struct acpi_table_header *table; |
| 485 | char cpio_path[32] = "kernel/firmware/acpi/"; |
| 486 | struct cpio_data file; |
| 487 | |
| 488 | if (data == NULL || size == 0) |
| 489 | return; |
| 490 | |
| 491 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { |
| 492 | file = find_cpio_data(cpio_path, data, size, &offset); |
| 493 | if (!file.data) |
| 494 | break; |
| 495 | |
| 496 | data += offset; |
| 497 | size -= offset; |
| 498 | |
| 499 | if (file.size < sizeof(struct acpi_table_header)) { |
| 500 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", |
| 501 | cpio_path, file.name); |
| 502 | continue; |
| 503 | } |
| 504 | |
| 505 | table = file.data; |
| 506 | |
| 507 | for (sig = 0; table_sigs[sig]; sig++) |
| 508 | if (!memcmp(table->signature, table_sigs[sig], 4)) |
| 509 | break; |
| 510 | |
| 511 | if (!table_sigs[sig]) { |
| 512 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", |
| 513 | cpio_path, file.name); |
| 514 | continue; |
| 515 | } |
| 516 | if (file.size != table->length) { |
| 517 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", |
| 518 | cpio_path, file.name); |
| 519 | continue; |
| 520 | } |
| 521 | if (acpi_table_checksum(file.data, table->length)) { |
| 522 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", |
| 523 | cpio_path, file.name); |
| 524 | continue; |
| 525 | } |
| 526 | |
| 527 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", |
| 528 | table->signature, cpio_path, file.name, table->length); |
| 529 | |
| 530 | all_tables_size += table->length; |
| 531 | acpi_initrd_files[table_nr].data = file.data; |
| 532 | acpi_initrd_files[table_nr].size = file.size; |
| 533 | table_nr++; |
| 534 | } |
| 535 | if (table_nr == 0) |
| 536 | return; |
| 537 | |
| 538 | acpi_tables_addr = |
| 539 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, |
| 540 | all_tables_size, PAGE_SIZE); |
| 541 | if (!acpi_tables_addr) { |
| 542 | WARN_ON(1); |
| 543 | return; |
| 544 | } |
| 545 | /* |
| 546 | * Only calling e820_add_reserve does not work and the |
| 547 | * tables are invalid (memory got used) later. |
| 548 | * memblock_reserve works as expected and the tables won't get modified. |
| 549 | * But it's not enough on X86 because ioremap will |
| 550 | * complain later (used by acpi_os_map_memory) that the pages |
| 551 | * that should get mapped are not marked "reserved". |
| 552 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) |
| 553 | * works fine. |
| 554 | */ |
| 555 | memblock_reserve(acpi_tables_addr, all_tables_size); |
| 556 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
| 557 | |
| 558 | /* |
| 559 | * early_ioremap only can remap 256k one time. If we map all |
| 560 | * tables one time, we will hit the limit. Need to map chunks |
| 561 | * one by one during copying the same as that in relocate_initrd(). |
| 562 | */ |
| 563 | for (no = 0; no < table_nr; no++) { |
| 564 | unsigned char *src_p = acpi_initrd_files[no].data; |
| 565 | phys_addr_t size = acpi_initrd_files[no].size; |
| 566 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; |
| 567 | phys_addr_t slop, clen; |
| 568 | char *dest_p; |
| 569 | |
| 570 | total_offset += size; |
| 571 | |
| 572 | while (size) { |
| 573 | slop = dest_addr & ~PAGE_MASK; |
| 574 | clen = size; |
| 575 | if (clen > MAP_CHUNK_SIZE - slop) |
| 576 | clen = MAP_CHUNK_SIZE - slop; |
| 577 | dest_p = early_ioremap(dest_addr & PAGE_MASK, |
| 578 | clen + slop); |
| 579 | memcpy(dest_p + slop, src_p, clen); |
| 580 | early_iounmap(dest_p, clen + slop); |
| 581 | src_p += clen; |
| 582 | dest_addr += clen; |
| 583 | size -= clen; |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | static acpi_status |
| 589 | acpi_table_initrd_override(struct acpi_table_header *existing_table, |
| 590 | acpi_physical_address *address, u32 *length) |
| 591 | { |
| 592 | int table_offset = 0; |
| 593 | int table_index = 0; |
| 594 | struct acpi_table_header *table; |
| 595 | u32 table_length; |
| 596 | |
| 597 | *length = 0; |
| 598 | *address = 0; |
| 599 | if (!acpi_tables_addr) |
| 600 | return AE_OK; |
| 601 | |
| 602 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { |
| 603 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, |
| 604 | ACPI_HEADER_SIZE); |
| 605 | if (table_offset + table->length > all_tables_size) { |
| 606 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| 607 | WARN_ON(1); |
| 608 | return AE_OK; |
| 609 | } |
| 610 | |
| 611 | table_length = table->length; |
| 612 | |
| 613 | /* Only override tables matched */ |
| 614 | if (test_bit(table_index, acpi_initrd_installed) || |
| 615 | memcmp(existing_table->signature, table->signature, 4) || |
| 616 | memcmp(table->oem_table_id, existing_table->oem_table_id, |
| 617 | ACPI_OEM_TABLE_ID_SIZE)) { |
| 618 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| 619 | goto next_table; |
| 620 | } |
| 621 | |
| 622 | *length = table_length; |
| 623 | *address = acpi_tables_addr + table_offset; |
| 624 | acpi_table_taint(existing_table); |
| 625 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| 626 | set_bit(table_index, acpi_initrd_installed); |
| 627 | break; |
| 628 | |
| 629 | next_table: |
| 630 | table_offset += table_length; |
| 631 | table_index++; |
| 632 | } |
| 633 | return AE_OK; |
| 634 | } |
| 635 | |
| 636 | static void __init acpi_table_initrd_scan(void) |
| 637 | { |
| 638 | int table_offset = 0; |
| 639 | int table_index = 0; |
| 640 | u32 table_length; |
| 641 | struct acpi_table_header *table; |
| 642 | |
| 643 | if (!acpi_tables_addr) |
| 644 | return; |
| 645 | |
| 646 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { |
| 647 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, |
| 648 | ACPI_HEADER_SIZE); |
| 649 | if (table_offset + table->length > all_tables_size) { |
| 650 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| 651 | WARN_ON(1); |
| 652 | return; |
| 653 | } |
| 654 | |
| 655 | table_length = table->length; |
| 656 | |
| 657 | /* Skip RSDT/XSDT which should only be used for override */ |
| 658 | if (test_bit(table_index, acpi_initrd_installed) || |
| 659 | ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) || |
| 660 | ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) { |
| 661 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| 662 | goto next_table; |
| 663 | } |
| 664 | |
| 665 | acpi_table_taint(table); |
| 666 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| 667 | acpi_install_table(acpi_tables_addr + table_offset, TRUE); |
| 668 | set_bit(table_index, acpi_initrd_installed); |
| 669 | next_table: |
| 670 | table_offset += table_length; |
| 671 | table_index++; |
| 672 | } |
| 673 | } |
| 674 | #else |
| 675 | static void __init acpi_table_initrd_init(void *data, size_t size) |
| 676 | { |
| 677 | } |
| 678 | |
| 679 | static acpi_status |
| 680 | acpi_table_initrd_override(struct acpi_table_header *existing_table, |
| 681 | acpi_physical_address *address, |
| 682 | u32 *table_length) |
| 683 | { |
| 684 | *table_length = 0; |
| 685 | *address = 0; |
| 686 | return AE_OK; |
| 687 | } |
| 688 | |
| 689 | static void __init acpi_table_initrd_scan(void) |
| 690 | { |
| 691 | } |
| 692 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ |
| 693 | |
| 694 | acpi_status |
| 695 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, |
| 696 | acpi_physical_address *address, |
| 697 | u32 *table_length) |
| 698 | { |
| 699 | return acpi_table_initrd_override(existing_table, address, |
| 700 | table_length); |
| 701 | } |
| 702 | |
| 703 | acpi_status |
| 704 | acpi_os_table_override(struct acpi_table_header *existing_table, |
| 705 | struct acpi_table_header **new_table) |
| 706 | { |
| 707 | if (!existing_table || !new_table) |
| 708 | return AE_BAD_PARAMETER; |
| 709 | |
| 710 | *new_table = NULL; |
| 711 | |
| 712 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| 713 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) |
| 714 | *new_table = (struct acpi_table_header *)AmlCode; |
| 715 | #endif |
| 716 | if (*new_table != NULL) |
| 717 | acpi_table_taint(existing_table); |
| 718 | return AE_OK; |
| 719 | } |
| 720 | |
| 721 | void __init early_acpi_table_init(void *data, size_t size) |
| 722 | { |
| 723 | acpi_table_initrd_init(data, size); |
| 724 | } |
| 725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | /* |
| 727 | * acpi_table_init() |
| 728 | * |
| 729 | * find RSDP, find and checksum SDT/XSDT. |
| 730 | * checksum all tables, print SDT/XSDT |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 731 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | * result: sdt_entry[] is initialized |
| 733 | */ |
| 734 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 735 | int __init acpi_table_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | { |
Len Brown | 9e3a9d1 | 2009-02-06 14:00:56 -0500 | [diff] [blame] | 737 | acpi_status status; |
| 738 | |
Lv Zheng | 4fc0a7e | 2014-05-31 08:15:02 +0800 | [diff] [blame] | 739 | if (acpi_verify_table_checksum) { |
| 740 | pr_info("Early table checksum verification enabled\n"); |
| 741 | acpi_gbl_verify_table_checksum = TRUE; |
| 742 | } else { |
| 743 | pr_info("Early table checksum verification disabled\n"); |
| 744 | acpi_gbl_verify_table_checksum = FALSE; |
| 745 | } |
| 746 | |
Len Brown | 9e3a9d1 | 2009-02-06 14:00:56 -0500 | [diff] [blame] | 747 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
| 748 | if (ACPI_FAILURE(status)) |
Hanjun Guo | 95df812 | 2013-12-05 23:42:38 +0800 | [diff] [blame] | 749 | return -EINVAL; |
Lv Zheng | 5ae74f2c | 2016-04-11 10:13:18 +0800 | [diff] [blame^] | 750 | acpi_table_initrd_scan(); |
Len Brown | 9e3a9d1 | 2009-02-06 14:00:56 -0500 | [diff] [blame] | 751 | |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 752 | check_multiple_madt(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | return 0; |
| 754 | } |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 755 | |
| 756 | static int __init acpi_parse_apic_instance(char *str) |
| 757 | { |
Cyrill Gorcunov | f0df2d6 | 2008-08-20 16:41:45 -0700 | [diff] [blame] | 758 | if (!str) |
| 759 | return -EINVAL; |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 760 | |
Christoph Jaeger | 3d91589 | 2014-06-13 21:49:58 +0200 | [diff] [blame] | 761 | if (kstrtoint(str, 0, &acpi_apic_instance)) |
| 762 | return -EINVAL; |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 763 | |
Hanjun Guo | 730bf5e | 2014-02-20 15:45:33 +0800 | [diff] [blame] | 764 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 765 | |
| 766 | return 0; |
| 767 | } |
| 768 | |
| 769 | early_param("acpi_apic_instance", acpi_parse_apic_instance); |
Lv Zheng | 4fc0a7e | 2014-05-31 08:15:02 +0800 | [diff] [blame] | 770 | |
| 771 | static int __init acpi_force_table_verification_setup(char *s) |
| 772 | { |
| 773 | acpi_verify_table_checksum = true; |
| 774 | |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | early_param("acpi_force_table_verification", acpi_force_table_verification_setup); |
Colin Ian King | b2ca5da | 2016-01-21 17:05:47 +0000 | [diff] [blame] | 779 | |
| 780 | static int __init acpi_force_32bit_fadt_addr(char *s) |
| 781 | { |
| 782 | pr_info("Forcing 32 Bit FADT addresses\n"); |
| 783 | acpi_gbl_use32_bit_fadt_addresses = TRUE; |
| 784 | |
| 785 | return 0; |
| 786 | } |
| 787 | |
| 788 | early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr); |