Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: tbfadt - FADT table utilities |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Len Brown | 75a44ce | 2008-04-23 23:00:13 -0400 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 45 | #include "accommon.h" |
| 46 | #include "actables.h" |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 47 | |
| 48 | #define _COMPONENT ACPI_TABLES |
| 49 | ACPI_MODULE_NAME("tbfadt") |
| 50 | |
| 51 | /* Local prototypes */ |
Bob Moore | 6de4048 | 2008-11-12 14:16:21 +0800 | [diff] [blame] | 52 | static inline void |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 53 | acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 54 | u8 space_id, u8 byte_width, u64 address); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 55 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 56 | static void acpi_tb_convert_fadt(void); |
| 57 | |
| 58 | static void acpi_tb_validate_fadt(void); |
| 59 | |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 60 | static void acpi_tb_setup_fadt_registers(void); |
| 61 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 62 | /* Table for conversion of FADT to common internal format and FADT validation */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 63 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 64 | typedef struct acpi_fadt_info { |
| 65 | char *name; |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 66 | u8 address64; |
| 67 | u8 address32; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 68 | u8 length; |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 69 | u8 default_length; |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 70 | u8 type; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 71 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 72 | } acpi_fadt_info; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 73 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 74 | #define ACPI_FADT_REQUIRED 1 |
| 75 | #define ACPI_FADT_SEPARATE_LENGTH 2 |
| 76 | |
| 77 | static struct acpi_fadt_info fadt_info_table[] = { |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 78 | {"Pm1aEventBlock", |
| 79 | ACPI_FADT_OFFSET(xpm1a_event_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 80 | ACPI_FADT_OFFSET(pm1a_event_block), |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 81 | ACPI_FADT_OFFSET(pm1_event_length), |
| 82 | ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ |
| 83 | ACPI_FADT_REQUIRED}, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 84 | |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 85 | {"Pm1bEventBlock", |
| 86 | ACPI_FADT_OFFSET(xpm1b_event_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 87 | ACPI_FADT_OFFSET(pm1b_event_block), |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 88 | ACPI_FADT_OFFSET(pm1_event_length), |
| 89 | ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ |
| 90 | 0}, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 91 | |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 92 | {"Pm1aControlBlock", |
| 93 | ACPI_FADT_OFFSET(xpm1a_control_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 94 | ACPI_FADT_OFFSET(pm1a_control_block), |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 95 | ACPI_FADT_OFFSET(pm1_control_length), |
| 96 | ACPI_PM1_REGISTER_WIDTH, |
| 97 | ACPI_FADT_REQUIRED}, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 98 | |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 99 | {"Pm1bControlBlock", |
| 100 | ACPI_FADT_OFFSET(xpm1b_control_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 101 | ACPI_FADT_OFFSET(pm1b_control_block), |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 102 | ACPI_FADT_OFFSET(pm1_control_length), |
| 103 | ACPI_PM1_REGISTER_WIDTH, |
| 104 | 0}, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 105 | |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 106 | {"Pm2ControlBlock", |
| 107 | ACPI_FADT_OFFSET(xpm2_control_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 108 | ACPI_FADT_OFFSET(pm2_control_block), |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 109 | ACPI_FADT_OFFSET(pm2_control_length), |
| 110 | ACPI_PM2_REGISTER_WIDTH, |
| 111 | ACPI_FADT_SEPARATE_LENGTH}, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 112 | |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 113 | {"PmTimerBlock", |
| 114 | ACPI_FADT_OFFSET(xpm_timer_block), |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 115 | ACPI_FADT_OFFSET(pm_timer_block), |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 116 | ACPI_FADT_OFFSET(pm_timer_length), |
| 117 | ACPI_PM_TIMER_WIDTH, |
| 118 | ACPI_FADT_REQUIRED}, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 119 | |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 120 | {"Gpe0Block", |
| 121 | ACPI_FADT_OFFSET(xgpe0_block), |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 122 | ACPI_FADT_OFFSET(gpe0_block), |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 123 | ACPI_FADT_OFFSET(gpe0_block_length), |
| 124 | 0, |
| 125 | ACPI_FADT_SEPARATE_LENGTH}, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 126 | |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 127 | {"Gpe1Block", |
| 128 | ACPI_FADT_OFFSET(xgpe1_block), |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 129 | ACPI_FADT_OFFSET(gpe1_block), |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 130 | ACPI_FADT_OFFSET(gpe1_block_length), |
| 131 | 0, |
| 132 | ACPI_FADT_SEPARATE_LENGTH} |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 133 | }; |
| 134 | |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 135 | #define ACPI_FADT_INFO_ENTRIES \ |
| 136 | (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info)) |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 137 | |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 138 | /* Table used to split Event Blocks into separate status/enable registers */ |
| 139 | |
| 140 | typedef struct acpi_fadt_pm_info { |
| 141 | struct acpi_generic_address *target; |
| 142 | u8 source; |
| 143 | u8 register_num; |
| 144 | |
| 145 | } acpi_fadt_pm_info; |
| 146 | |
| 147 | static struct acpi_fadt_pm_info fadt_pm_info_table[] = { |
| 148 | {&acpi_gbl_xpm1a_status, |
| 149 | ACPI_FADT_OFFSET(xpm1a_event_block), |
| 150 | 0}, |
| 151 | |
| 152 | {&acpi_gbl_xpm1a_enable, |
| 153 | ACPI_FADT_OFFSET(xpm1a_event_block), |
| 154 | 1}, |
| 155 | |
| 156 | {&acpi_gbl_xpm1b_status, |
| 157 | ACPI_FADT_OFFSET(xpm1b_event_block), |
| 158 | 0}, |
| 159 | |
| 160 | {&acpi_gbl_xpm1b_enable, |
| 161 | ACPI_FADT_OFFSET(xpm1b_event_block), |
| 162 | 1} |
| 163 | }; |
| 164 | |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 165 | #define ACPI_FADT_PM_INFO_ENTRIES \ |
| 166 | (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info)) |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 167 | |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 168 | /******************************************************************************* |
| 169 | * |
| 170 | * FUNCTION: acpi_tb_init_generic_address |
| 171 | * |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 172 | * PARAMETERS: generic_address - GAS struct to be initialized |
Jan Beulich | fcea94b | 2008-09-19 15:50:32 -0700 | [diff] [blame] | 173 | * byte_width - Width of this register |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 174 | * Address - Address of the register |
| 175 | * |
| 176 | * RETURN: None |
| 177 | * |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 178 | * DESCRIPTION: Initialize a Generic Address Structure (GAS) |
| 179 | * See the ACPI specification for a full description and |
| 180 | * definition of this structure. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 181 | * |
| 182 | ******************************************************************************/ |
| 183 | |
Bob Moore | 6de4048 | 2008-11-12 14:16:21 +0800 | [diff] [blame] | 184 | static inline void |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 185 | acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 186 | u8 space_id, u8 byte_width, u64 address) |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 187 | { |
| 188 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 189 | /* |
| 190 | * The 64-bit Address field is non-aligned in the byte packed |
| 191 | * GAS struct. |
| 192 | */ |
| 193 | ACPI_MOVE_64_TO_64(&generic_address->address, &address); |
| 194 | |
| 195 | /* All other fields are byte-wide */ |
| 196 | |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 197 | generic_address->space_id = space_id; |
| 198 | generic_address->bit_width = (u8)ACPI_MUL_8(byte_width); |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 199 | generic_address->bit_offset = 0; |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 200 | generic_address->access_width = 0; /* Access width ANY */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | /******************************************************************************* |
| 204 | * |
| 205 | * FUNCTION: acpi_tb_parse_fadt |
| 206 | * |
| 207 | * PARAMETERS: table_index - Index for the FADT |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 208 | * |
| 209 | * RETURN: None |
| 210 | * |
| 211 | * DESCRIPTION: Initialize the FADT, DSDT and FACS tables |
| 212 | * (FADT contains the addresses of the DSDT and FACS) |
| 213 | * |
| 214 | ******************************************************************************/ |
| 215 | |
Bob Moore | 97cbb7d | 2009-02-03 14:41:03 +0800 | [diff] [blame] | 216 | void acpi_tb_parse_fadt(u32 table_index) |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 217 | { |
| 218 | u32 length; |
| 219 | struct acpi_table_header *table; |
| 220 | |
| 221 | /* |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 222 | * The FADT has multiple versions with different lengths, |
| 223 | * and it contains pointers to both the DSDT and FACS tables. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 224 | * |
| 225 | * Get a local copy of the FADT and convert it to a common format |
| 226 | * Map entire FADT, assumed to be smaller than one page. |
| 227 | */ |
| 228 | length = acpi_gbl_root_table_list.tables[table_index].length; |
| 229 | |
| 230 | table = |
| 231 | acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index]. |
| 232 | address, length); |
| 233 | if (!table) { |
| 234 | return; |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * Validate the FADT checksum before we copy the table. Ignore |
| 239 | * checksum error as we want to try to get the DSDT and FACS. |
| 240 | */ |
| 241 | (void)acpi_tb_verify_checksum(table, length); |
| 242 | |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 243 | /* Create a local copy of the FADT in common ACPI 2.0+ format */ |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 244 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 245 | acpi_tb_create_local_fadt(table, length); |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 246 | |
| 247 | /* All done with the real FADT, unmap it */ |
| 248 | |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 249 | acpi_os_unmap_memory(table, length); |
| 250 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 251 | /* Obtain the DSDT and FACS tables via their addresses within the FADT */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 252 | |
| 253 | acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt, |
Bob Moore | 97cbb7d | 2009-02-03 14:41:03 +0800 | [diff] [blame] | 254 | ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 255 | |
| 256 | acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs, |
Bob Moore | 97cbb7d | 2009-02-03 14:41:03 +0800 | [diff] [blame] | 257 | ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | /******************************************************************************* |
| 261 | * |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 262 | * FUNCTION: acpi_tb_create_local_fadt |
| 263 | * |
| 264 | * PARAMETERS: Table - Pointer to BIOS FADT |
| 265 | * Length - Length of the table |
| 266 | * |
| 267 | * RETURN: None |
| 268 | * |
| 269 | * DESCRIPTION: Get a local copy of the FADT and convert it to a common format. |
| 270 | * Performs validation on some important FADT fields. |
| 271 | * |
Bob Moore | 55f8f3c | 2007-05-02 15:51:37 -0400 | [diff] [blame] | 272 | * NOTE: We create a local copy of the FADT regardless of the version. |
| 273 | * |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 274 | ******************************************************************************/ |
| 275 | |
| 276 | void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) |
| 277 | { |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 278 | /* |
Bob Moore | 55f8f3c | 2007-05-02 15:51:37 -0400 | [diff] [blame] | 279 | * Check if the FADT is larger than the largest table that we expect |
| 280 | * (the ACPI 2.0/3.0 version). If so, truncate the table, and issue |
| 281 | * a warning. |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 282 | */ |
| 283 | if (length > sizeof(struct acpi_table_fadt)) { |
| 284 | ACPI_WARNING((AE_INFO, |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 285 | "FADT (revision %u) is longer than ACPI 2.0 version, " |
Bob Moore | b21245a | 2009-04-22 12:52:51 +0800 | [diff] [blame] | 286 | "truncating length 0x%X to 0x%X", |
| 287 | table->revision, length, |
| 288 | (u32)sizeof(struct acpi_table_fadt))); |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 289 | } |
| 290 | |
Bob Moore | 55f8f3c | 2007-05-02 15:51:37 -0400 | [diff] [blame] | 291 | /* Clear the entire local FADT */ |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 292 | |
| 293 | ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); |
| 294 | |
Bob Moore | 55f8f3c | 2007-05-02 15:51:37 -0400 | [diff] [blame] | 295 | /* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */ |
| 296 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 297 | ACPI_MEMCPY(&acpi_gbl_FADT, table, |
| 298 | ACPI_MIN(length, sizeof(struct acpi_table_fadt))); |
| 299 | |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 300 | /* Convert the local copy of the FADT to the common internal format */ |
| 301 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 302 | acpi_tb_convert_fadt(); |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 303 | |
| 304 | /* Validate FADT values now, before we make any changes */ |
| 305 | |
| 306 | acpi_tb_validate_fadt(); |
| 307 | |
| 308 | /* Initialize the global ACPI register structures */ |
| 309 | |
| 310 | acpi_tb_setup_fadt_registers(); |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | /******************************************************************************* |
| 314 | * |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 315 | * FUNCTION: acpi_tb_convert_fadt |
| 316 | * |
| 317 | * PARAMETERS: None, uses acpi_gbl_FADT |
| 318 | * |
| 319 | * RETURN: None |
| 320 | * |
| 321 | * DESCRIPTION: Converts all versions of the FADT to a common internal format. |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 322 | * Expand 32-bit addresses to 64-bit as necessary. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 323 | * |
Bob Moore | e56b638 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 324 | * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), |
| 325 | * and must contain a copy of the actual FADT. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 326 | * |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 327 | * Notes on 64-bit register addresses: |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 328 | * |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 329 | * After this FADT conversion, later ACPICA code will only use the 64-bit "X" |
| 330 | * fields of the FADT for all ACPI register addresses. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 331 | * |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 332 | * The 64-bit "X" fields are optional extensions to the original 32-bit FADT |
| 333 | * V1.0 fields. Even if they are present in the FADT, they are optional and |
| 334 | * are unused if the BIOS sets them to zero. Therefore, we must copy/expand |
| 335 | * 32-bit V1.0 fields if the corresponding X field is zero. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 336 | * |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 337 | * For ACPI 1.0 FADTs, all 32-bit address fields are expanded to the |
| 338 | * corresponding "X" fields in the internal FADT. |
| 339 | * |
| 340 | * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded |
| 341 | * to the corresponding 64-bit X fields. For compatibility with other ACPI |
| 342 | * implementations, we ignore the 64-bit field if the 32-bit field is valid, |
| 343 | * regardless of whether the host OS is 32-bit or 64-bit. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 344 | * |
| 345 | ******************************************************************************/ |
| 346 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 347 | static void acpi_tb_convert_fadt(void) |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 348 | { |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 349 | struct acpi_generic_address *address64; |
| 350 | u32 address32; |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 351 | u32 i; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 352 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 353 | /* Update the local FADT table header length */ |
| 354 | |
| 355 | acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt); |
| 356 | |
Bob Moore | c87609f | 2008-11-12 15:23:20 +0800 | [diff] [blame] | 357 | /* |
| 358 | * Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary. |
| 359 | * Later code will always use the X 64-bit field. Also, check for an |
| 360 | * address mismatch between the 32-bit and 64-bit address fields |
| 361 | * (FIRMWARE_CTRL/X_FIRMWARE_CTRL, DSDT/X_DSDT) which would indicate |
| 362 | * the presence of two FACS or two DSDT tables. |
| 363 | */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 364 | if (!acpi_gbl_FADT.Xfacs) { |
| 365 | acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; |
Bob Moore | c87609f | 2008-11-12 15:23:20 +0800 | [diff] [blame] | 366 | } else if (acpi_gbl_FADT.facs && |
| 367 | (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) { |
| 368 | ACPI_WARNING((AE_INFO, |
| 369 | "32/64 FACS address mismatch in FADT - two FACS tables!")); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | if (!acpi_gbl_FADT.Xdsdt) { |
| 373 | acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; |
Bob Moore | c87609f | 2008-11-12 15:23:20 +0800 | [diff] [blame] | 374 | } else if (acpi_gbl_FADT.dsdt && |
| 375 | (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) { |
| 376 | ACPI_WARNING((AE_INFO, |
| 377 | "32/64 DSDT address mismatch in FADT - two DSDT tables!")); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | /* |
Bob Moore | 55f8f3c | 2007-05-02 15:51:37 -0400 | [diff] [blame] | 381 | * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which |
| 382 | * should be zero are indeed zero. This will workaround BIOSs that |
| 383 | * inadvertently place values in these fields. |
| 384 | * |
| 385 | * The ACPI 1.0 reserved fields that will be zeroed are the bytes located at |
| 386 | * offset 45, 55, 95, and the word located at offset 109, 110. |
| 387 | */ |
Yinghai Lu | 14a63ba | 2008-10-29 14:13:22 -0700 | [diff] [blame] | 388 | if (acpi_gbl_FADT.header.revision < FADT2_REVISION_ID) { |
Bob Moore | 55f8f3c | 2007-05-02 15:51:37 -0400 | [diff] [blame] | 389 | acpi_gbl_FADT.preferred_profile = 0; |
| 390 | acpi_gbl_FADT.pstate_control = 0; |
| 391 | acpi_gbl_FADT.cst_control = 0; |
| 392 | acpi_gbl_FADT.boot_flags = 0; |
| 393 | } |
| 394 | |
| 395 | /* |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 396 | * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X" |
| 397 | * generic address structures as necessary. Later code will always use |
| 398 | * the 64-bit address structures. |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 399 | * |
| 400 | * March 2009: |
| 401 | * We now always use the 32-bit address if it is valid (non-null). This |
| 402 | * is not in accordance with the ACPI specification which states that |
| 403 | * the 64-bit address supersedes the 32-bit version, but we do this for |
| 404 | * compatibility with other ACPI implementations. Most notably, in the |
| 405 | * case where both the 32 and 64 versions are non-null, we use the 32-bit |
| 406 | * version. This is the only address that is guaranteed to have been |
| 407 | * tested by the BIOS manufacturer. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 408 | */ |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 409 | for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 410 | address32 = *ACPI_ADD_PTR(u32, |
| 411 | &acpi_gbl_FADT, |
| 412 | fadt_info_table[i].address32); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 413 | |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 414 | address64 = ACPI_ADD_PTR(struct acpi_generic_address, |
| 415 | &acpi_gbl_FADT, |
| 416 | fadt_info_table[i].address64); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 417 | |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 418 | /* |
| 419 | * If both 32- and 64-bit addresses are valid (non-zero), |
| 420 | * they must match. |
| 421 | */ |
| 422 | if (address64->address && address32 && |
| 423 | (address64->address != (u64) address32)) { |
| 424 | ACPI_ERROR((AE_INFO, |
| 425 | "32/64X address mismatch in %s: %8.8X/%8.8X%8.8X, using 32", |
| 426 | fadt_info_table[i].name, address32, |
| 427 | ACPI_FORMAT_UINT64(address64->address))); |
| 428 | } |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 429 | |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 430 | /* Always use 32-bit address if it is valid (non-null) */ |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 431 | |
Bob Moore | 31fbc07 | 2009-03-19 10:12:13 +0800 | [diff] [blame] | 432 | if (address32) { |
| 433 | /* |
| 434 | * Copy the 32-bit address to the 64-bit GAS structure. The |
| 435 | * Space ID is always I/O for 32-bit legacy address fields |
| 436 | */ |
| 437 | acpi_tb_init_generic_address(address64, |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 438 | ACPI_ADR_SPACE_SYSTEM_IO, |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 439 | *ACPI_ADD_PTR(u8, |
| 440 | &acpi_gbl_FADT, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 441 | fadt_info_table |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 442 | [i].length), |
Bob Moore | e4c1ebf | 2009-04-22 13:02:06 +0800 | [diff] [blame] | 443 | (u64) address32); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 444 | } |
| 445 | } |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 446 | } |
| 447 | |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 448 | /******************************************************************************* |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 449 | * |
| 450 | * FUNCTION: acpi_tb_validate_fadt |
| 451 | * |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 452 | * PARAMETERS: Table - Pointer to the FADT to be validated |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 453 | * |
Bob Moore | e56b638 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 454 | * RETURN: None |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 455 | * |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 456 | * DESCRIPTION: Validate various important fields within the FADT. If a problem |
| 457 | * is found, issue a message, but no status is returned. |
| 458 | * Used by both the table manager and the disassembler. |
| 459 | * |
| 460 | * Possible additional checks: |
| 461 | * (acpi_gbl_FADT.pm1_event_length >= 4) |
| 462 | * (acpi_gbl_FADT.pm1_control_length >= 2) |
| 463 | * (acpi_gbl_FADT.pm_timer_length >= 4) |
| 464 | * Gpe block lengths must be multiple of 2 |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 465 | * |
| 466 | ******************************************************************************/ |
| 467 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 468 | static void acpi_tb_validate_fadt(void) |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 469 | { |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 470 | char *name; |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 471 | struct acpi_generic_address *address64; |
| 472 | u8 length; |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 473 | u32 i; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 474 | |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 475 | /* |
| 476 | * Check for FACS and DSDT address mismatches. An address mismatch between |
| 477 | * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and |
| 478 | * DSDT/X_DSDT) would indicate the presence of two FACS or two DSDT tables. |
| 479 | */ |
| 480 | if (acpi_gbl_FADT.facs && |
| 481 | (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) { |
| 482 | ACPI_WARNING((AE_INFO, |
Bob Moore | 40774f7 | 2008-12-16 18:22:01 +0800 | [diff] [blame] | 483 | "32/64X FACS address mismatch in FADT - " |
Bob Moore | f655630 | 2009-03-19 10:13:40 +0800 | [diff] [blame] | 484 | "%8.8X/%8.8X%8.8X, using 32", |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 485 | acpi_gbl_FADT.facs, |
| 486 | ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs))); |
Bob Moore | f655630 | 2009-03-19 10:13:40 +0800 | [diff] [blame] | 487 | |
| 488 | acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | if (acpi_gbl_FADT.dsdt && |
| 492 | (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) { |
| 493 | ACPI_WARNING((AE_INFO, |
Bob Moore | 40774f7 | 2008-12-16 18:22:01 +0800 | [diff] [blame] | 494 | "32/64X DSDT address mismatch in FADT - " |
Bob Moore | f655630 | 2009-03-19 10:13:40 +0800 | [diff] [blame] | 495 | "%8.8X/%8.8X%8.8X, using 32", |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 496 | acpi_gbl_FADT.dsdt, |
| 497 | ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xdsdt))); |
Bob Moore | f655630 | 2009-03-19 10:13:40 +0800 | [diff] [blame] | 498 | |
| 499 | acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 500 | } |
| 501 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 502 | /* Examine all of the 64-bit extended address fields (X fields) */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 503 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 504 | for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 505 | /* |
Bob Moore | e4c1ebf | 2009-04-22 13:02:06 +0800 | [diff] [blame] | 506 | * Generate pointer to the 64-bit address, get the register |
| 507 | * length (width) and the register name |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 508 | */ |
| 509 | address64 = ACPI_ADD_PTR(struct acpi_generic_address, |
| 510 | &acpi_gbl_FADT, |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 511 | fadt_info_table[i].address64); |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 512 | length = |
| 513 | *ACPI_ADD_PTR(u8, &acpi_gbl_FADT, |
| 514 | fadt_info_table[i].length); |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 515 | name = fadt_info_table[i].name; |
| 516 | |
| 517 | /* |
| 518 | * For each extended field, check for length mismatch between the |
robert.moore@intel.com | 4b67a0e | 2008-12-31 13:07:26 +0800 | [diff] [blame] | 519 | * legacy length field and the corresponding 64-bit X length field. |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 520 | */ |
Bob Moore | aab61b6 | 2009-03-06 10:09:00 +0800 | [diff] [blame] | 521 | if (address64->address && |
| 522 | (address64->bit_width != ACPI_MUL_8(length))) { |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 523 | ACPI_WARNING((AE_INFO, |
Bob Moore | 40774f7 | 2008-12-16 18:22:01 +0800 | [diff] [blame] | 524 | "32/64X length mismatch in %s: %d/%d", |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 525 | name, ACPI_MUL_8(length), |
| 526 | address64->bit_width)); |
| 527 | } |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 528 | |
| 529 | if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) { |
| 530 | /* |
| 531 | * Field is required (Pm1a_event, Pm1a_control, pm_timer). |
| 532 | * Both the address and length must be non-zero. |
| 533 | */ |
| 534 | if (!address64->address || !length) { |
| 535 | ACPI_ERROR((AE_INFO, |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 536 | "Required field %s has zero address and/or length:" |
| 537 | " %8.8X%8.8X/%X", |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 538 | name, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 539 | ACPI_FORMAT_UINT64(address64-> |
| 540 | address), |
| 541 | length)); |
| 542 | } |
| 543 | } else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) { |
| 544 | /* |
| 545 | * Field is optional (PM2Control, GPE0, GPE1) AND has its own |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 546 | * length field. If present, both the address and length must |
| 547 | * be valid. |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 548 | */ |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 549 | if ((address64->address && !length) || |
| 550 | (!address64->address && length)) { |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 551 | ACPI_WARNING((AE_INFO, |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 552 | "Optional field %s has zero address or length: " |
| 553 | "%8.8X%8.8X/%X", |
Bob Moore | 06f5541 | 2008-12-31 03:06:06 +0800 | [diff] [blame] | 554 | name, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 555 | ACPI_FORMAT_UINT64(address64-> |
| 556 | address), |
| 557 | length)); |
| 558 | } |
| 559 | } |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 560 | } |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 561 | } |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 562 | |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 563 | /******************************************************************************* |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 564 | * |
| 565 | * FUNCTION: acpi_tb_setup_fadt_registers |
| 566 | * |
| 567 | * PARAMETERS: None, uses acpi_gbl_FADT. |
| 568 | * |
| 569 | * RETURN: None |
| 570 | * |
| 571 | * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally, |
| 572 | * force FADT register definitions to their default lengths. |
| 573 | * |
| 574 | ******************************************************************************/ |
| 575 | |
| 576 | static void acpi_tb_setup_fadt_registers(void) |
| 577 | { |
| 578 | struct acpi_generic_address *target64; |
| 579 | struct acpi_generic_address *source64; |
| 580 | u8 pm1_register_byte_width; |
| 581 | u32 i; |
| 582 | |
| 583 | /* |
| 584 | * Optionally check all register lengths against the default values and |
| 585 | * update them if they are incorrect. |
| 586 | */ |
| 587 | if (acpi_gbl_use_default_register_widths) { |
| 588 | for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { |
| 589 | target64 = |
| 590 | ACPI_ADD_PTR(struct acpi_generic_address, |
| 591 | &acpi_gbl_FADT, |
| 592 | fadt_info_table[i].address64); |
| 593 | |
| 594 | /* |
| 595 | * If a valid register (Address != 0) and the (default_length > 0) |
| 596 | * (Not a GPE register), then check the width against the default. |
| 597 | */ |
| 598 | if ((target64->address) && |
| 599 | (fadt_info_table[i].default_length > 0) && |
| 600 | (fadt_info_table[i].default_length != |
| 601 | target64->bit_width)) { |
| 602 | ACPI_WARNING((AE_INFO, |
| 603 | "Invalid length for %s: %d, using default %d", |
| 604 | fadt_info_table[i].name, |
| 605 | target64->bit_width, |
| 606 | fadt_info_table[i]. |
| 607 | default_length)); |
| 608 | |
| 609 | /* Incorrect size, set width to the default */ |
| 610 | |
| 611 | target64->bit_width = |
| 612 | fadt_info_table[i].default_length; |
| 613 | } |
| 614 | } |
| 615 | } |
| 616 | |
| 617 | /* |
| 618 | * Get the length of the individual PM1 registers (enable and status). |
| 619 | * Each register is defined to be (event block length / 2). Extra divide |
| 620 | * by 8 converts bits to bytes. |
| 621 | */ |
Bob Moore | ec41f19 | 2009-02-18 15:03:30 +0800 | [diff] [blame] | 622 | pm1_register_byte_width = (u8) |
| 623 | ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width); |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 624 | |
| 625 | /* |
| 626 | * Calculate separate GAS structs for the PM1x (A/B) Status and Enable |
| 627 | * registers. These addresses do not appear (directly) in the FADT, so it |
| 628 | * is useful to pre-calculate them from the PM1 Event Block definitions. |
| 629 | * |
| 630 | * The PM event blocks are split into two register blocks, first is the |
| 631 | * PM Status Register block, followed immediately by the PM Enable |
| 632 | * Register block. Each is of length (pm1_event_length/2) |
| 633 | * |
| 634 | * Note: The PM1A event block is required by the ACPI specification. |
| 635 | * However, the PM1B event block is optional and is rarely, if ever, |
| 636 | * used. |
| 637 | */ |
| 638 | |
| 639 | for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) { |
| 640 | source64 = |
| 641 | ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, |
| 642 | fadt_pm_info_table[i].source); |
| 643 | |
Lin Ming | 5e053e7 | 2009-03-04 14:31:25 +0800 | [diff] [blame] | 644 | if (source64->address) { |
| 645 | acpi_tb_init_generic_address(fadt_pm_info_table[i]. |
| 646 | target, source64->space_id, |
| 647 | pm1_register_byte_width, |
| 648 | source64->address + |
| 649 | (fadt_pm_info_table[i]. |
| 650 | register_num * |
| 651 | pm1_register_byte_width)); |
| 652 | } |
Bob Moore | 531c633 | 2009-02-18 14:06:12 +0800 | [diff] [blame] | 653 | } |
| 654 | } |