1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ 2 /****************************************************************************** 3 * 4 * Name: actbl.h - Basic ACPI Table Definitions 5 * 6 * Copyright (C) 2000 - 2025, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #ifndef __ACTBL_H__ 11 #define __ACTBL_H__ 12 13 /******************************************************************************* 14 * 15 * Fundamental ACPI tables 16 * 17 * This file contains definitions for the ACPI tables that are directly consumed 18 * by ACPICA. All other tables are consumed by the OS-dependent ACPI-related 19 * device drivers and other OS support code. 20 * 21 * The RSDP and FACS do not use the common ACPI table header. All other ACPI 22 * tables use the header. 23 * 24 ******************************************************************************/ 25 26 /* 27 * Values for description table header signatures for tables defined in this 28 * file. Useful because they make it more difficult to inadvertently type in 29 * the wrong signature. 30 */ 31 #define ACPI_SIG_DSDT "DSDT" /* Differentiated System Description Table */ 32 #define ACPI_SIG_FADT "FACP" /* Fixed ACPI Description Table */ 33 #define ACPI_SIG_FACS "FACS" /* Firmware ACPI Control Structure */ 34 #define ACPI_SIG_OSDT "OSDT" /* Override System Description Table */ 35 #define ACPI_SIG_PSDT "PSDT" /* Persistent System Description Table */ 36 #define ACPI_SIG_RSDP "RSD PTR " /* Root System Description Pointer */ 37 #define ACPI_SIG_RSDT "RSDT" /* Root System Description Table */ 38 #define ACPI_SIG_XSDT "XSDT" /* Extended System Description Table */ 39 #define ACPI_SIG_SSDT "SSDT" /* Secondary System Description Table */ 40 #define ACPI_RSDP_NAME "RSDP" /* Short name for RSDP, not signature */ 41 #define ACPI_OEM_NAME "OEM" /* Short name for OEM, not signature */ 42 43 /* 44 * All tables and structures must be byte-packed to match the ACPI 45 * specification, since the tables are provided by the system BIOS 46 */ 47 #pragma pack(1) 48 49 /* 50 * Note: C bitfields are not used for this reason: 51 * 52 * "Bitfields are great and easy to read, but unfortunately the C language 53 * does not specify the layout of bitfields in memory, which means they are 54 * essentially useless for dealing with packed data in on-disk formats or 55 * binary wire protocols." (Or ACPI tables and buffers.) "If you ask me, 56 * this decision was a design error in C. Ritchie could have picked an order 57 * and stuck with it." Norman Ramsey. 58 * See http://stackoverflow.com/a/1053662/41661 59 */ 60 61 /******************************************************************************* 62 * 63 * Master ACPI Table Header. This common header is used by all ACPI tables 64 * except the RSDP and FACS. 65 * 66 ******************************************************************************/ 67 68 struct acpi_table_header { 69 char signature[ACPI_NAMESEG_SIZE] ACPI_NONSTRING; /* ASCII table signature */ 70 u32 length; /* Length of table in bytes, including this header */ 71 u8 revision; /* ACPI Specification minor version number */ 72 u8 checksum; /* To make sum of entire table == 0 */ 73 char oem_id[ACPI_OEM_ID_SIZE] ACPI_NONSTRING; /* ASCII OEM identification */ 74 char oem_table_id[ACPI_OEM_TABLE_ID_SIZE] ACPI_NONSTRING; /* ASCII OEM table identification */ 75 u32 oem_revision; /* OEM revision number */ 76 char asl_compiler_id[ACPI_NAMESEG_SIZE] ACPI_NONSTRING; /* ASCII ASL compiler vendor ID */ 77 u32 asl_compiler_revision; /* ASL compiler version */ 78 }; 79 80 /******************************************************************************* 81 * 82 * GAS - Generic Address Structure (ACPI 2.0+) 83 * 84 * Note: Since this structure is used in the ACPI tables, it is byte aligned. 85 * If misaligned access is not supported by the hardware, accesses to the 86 * 64-bit Address field must be performed with care. 87 * 88 ******************************************************************************/ 89 90 struct acpi_generic_address { 91 u8 space_id; /* Address space where struct or register exists */ 92 u8 bit_width; /* Size in bits of given register */ 93 u8 bit_offset; /* Bit offset within the register */ 94 u8 access_width; /* Minimum Access size (ACPI 3.0) */ 95 u64 address; /* 64-bit address of struct or register */ 96 }; 97 98 /******************************************************************************* 99 * 100 * RSDP - Root System Description Pointer (Signature is "RSD PTR ") 101 * Version 2 102 * 103 ******************************************************************************/ 104 105 struct acpi_table_rsdp { 106 char signature[8]; /* ACPI signature, contains "RSD PTR " */ 107 u8 checksum; /* ACPI 1.0 checksum */ 108 char oem_id[ACPI_OEM_ID_SIZE]; /* OEM identification */ 109 u8 revision; /* Must be (0) for ACPI 1.0 or (2) for ACPI 2.0+ */ 110 u32 rsdt_physical_address; /* 32-bit physical address of the RSDT */ 111 u32 length; /* Table length in bytes, including header (ACPI 2.0+) */ 112 u64 xsdt_physical_address; /* 64-bit physical address of the XSDT (ACPI 2.0+) */ 113 u8 extended_checksum; /* Checksum of entire table (ACPI 2.0+) */ 114 u8 reserved[3]; /* Reserved, must be zero */ 115 }; 116 117 /* Standalone struct for the ACPI 1.0 RSDP */ 118 119 struct acpi_rsdp_common { 120 char signature[8]; 121 u8 checksum; 122 char oem_id[ACPI_OEM_ID_SIZE]; 123 u8 revision; 124 u32 rsdt_physical_address; 125 }; 126 127 /* Standalone struct for the extended part of the RSDP (ACPI 2.0+) */ 128 129 struct acpi_rsdp_extension { 130 u32 length; 131 u64 xsdt_physical_address; 132 u8 extended_checksum; 133 u8 reserved[3]; 134 }; 135 136 /******************************************************************************* 137 * 138 * RSDT/XSDT - Root System Description Tables 139 * Version 1 (both) 140 * 141 ******************************************************************************/ 142 143 struct acpi_table_rsdt { 144 struct acpi_table_header header; /* Common ACPI table header */ 145 u32 table_offset_entry[1]; /* Array of pointers to ACPI tables */ 146 }; 147 148 struct acpi_table_xsdt { 149 struct acpi_table_header header; /* Common ACPI table header */ 150 u64 table_offset_entry[1]; /* Array of pointers to ACPI tables */ 151 }; 152 153 #define ACPI_RSDT_ENTRY_SIZE (sizeof (u32)) 154 #define ACPI_XSDT_ENTRY_SIZE (sizeof (u64)) 155 156 /******************************************************************************* 157 * 158 * FACS - Firmware ACPI Control Structure (FACS) 159 * 160 ******************************************************************************/ 161 162 struct acpi_table_facs { 163 char signature[4]; /* ASCII table signature */ 164 u32 length; /* Length of structure, in bytes */ 165 u32 hardware_signature; /* Hardware configuration signature */ 166 u32 firmware_waking_vector; /* 32-bit physical address of the Firmware Waking Vector */ 167 u32 global_lock; /* Global Lock for shared hardware resources */ 168 u32 flags; 169 u64 xfirmware_waking_vector; /* 64-bit version of the Firmware Waking Vector (ACPI 2.0+) */ 170 u8 version; /* Version of this table (ACPI 2.0+) */ 171 u8 reserved[3]; /* Reserved, must be zero */ 172 u32 ospm_flags; /* Flags to be set by OSPM (ACPI 4.0) */ 173 u8 reserved1[24]; /* Reserved, must be zero */ 174 }; 175 176 /* Masks for global_lock flag field above */ 177 178 #define ACPI_GLOCK_PENDING (1) /* 00: Pending global lock ownership */ 179 #define ACPI_GLOCK_OWNED (1<<1) /* 01: Global lock is owned */ 180 181 /* Masks for Flags field above */ 182 183 #define ACPI_FACS_S4_BIOS_PRESENT (1) /* 00: S4BIOS support is present */ 184 #define ACPI_FACS_64BIT_WAKE (1<<1) /* 01: 64-bit wake vector supported (ACPI 4.0) */ 185 186 /* Masks for ospm_flags field above */ 187 188 #define ACPI_FACS_64BIT_ENVIRONMENT (1) /* 00: 64-bit wake environment is required (ACPI 4.0) */ 189 190 /******************************************************************************* 191 * 192 * FADT - Fixed ACPI Description Table (Signature "FACP") 193 * Version 6 194 * 195 ******************************************************************************/ 196 197 /* Fields common to all versions of the FADT */ 198 199 struct acpi_table_fadt { 200 struct acpi_table_header header; /* Common ACPI table header */ 201 u32 facs; /* 32-bit physical address of FACS */ 202 u32 dsdt; /* 32-bit physical address of DSDT */ 203 u8 model; /* System Interrupt Model (ACPI 1.0) - not used in ACPI 2.0+ */ 204 u8 preferred_profile; /* Conveys preferred power management profile to OSPM. */ 205 u16 sci_interrupt; /* System vector of SCI interrupt */ 206 u32 smi_command; /* 32-bit Port address of SMI command port */ 207 u8 acpi_enable; /* Value to write to SMI_CMD to enable ACPI */ 208 u8 acpi_disable; /* Value to write to SMI_CMD to disable ACPI */ 209 u8 s4_bios_request; /* Value to write to SMI_CMD to enter S4BIOS state */ 210 u8 pstate_control; /* Processor performance state control */ 211 u32 pm1a_event_block; /* 32-bit port address of Power Mgt 1a Event Reg Blk */ 212 u32 pm1b_event_block; /* 32-bit port address of Power Mgt 1b Event Reg Blk */ 213 u32 pm1a_control_block; /* 32-bit port address of Power Mgt 1a Control Reg Blk */ 214 u32 pm1b_control_block; /* 32-bit port address of Power Mgt 1b Control Reg Blk */ 215 u32 pm2_control_block; /* 32-bit port address of Power Mgt 2 Control Reg Blk */ 216 u32 pm_timer_block; /* 32-bit port address of Power Mgt Timer Ctrl Reg Blk */ 217 u32 gpe0_block; /* 32-bit port address of General Purpose Event 0 Reg Blk */ 218 u32 gpe1_block; /* 32-bit port address of General Purpose Event 1 Reg Blk */ 219 u8 pm1_event_length; /* Byte Length of ports at pm1x_event_block */ 220 u8 pm1_control_length; /* Byte Length of ports at pm1x_control_block */ 221 u8 pm2_control_length; /* Byte Length of ports at pm2_control_block */ 222 u8 pm_timer_length; /* Byte Length of ports at pm_timer_block */ 223 u8 gpe0_block_length; /* Byte Length of ports at gpe0_block */ 224 u8 gpe1_block_length; /* Byte Length of ports at gpe1_block */ 225 u8 gpe1_base; /* Offset in GPE number space where GPE1 events start */ 226 u8 cst_control; /* Support for the _CST object and C-States change notification */ 227 u16 c2_latency; /* Worst case HW latency to enter/exit C2 state */ 228 u16 c3_latency; /* Worst case HW latency to enter/exit C3 state */ 229 u16 flush_size; /* Processor memory cache line width, in bytes */ 230 u16 flush_stride; /* Number of flush strides that need to be read */ 231 u8 duty_offset; /* Processor duty cycle index in processor P_CNT reg */ 232 u8 duty_width; /* Processor duty cycle value bit width in P_CNT register */ 233 u8 day_alarm; /* Index to day-of-month alarm in RTC CMOS RAM */ 234 u8 month_alarm; /* Index to month-of-year alarm in RTC CMOS RAM */ 235 u8 century; /* Index to century in RTC CMOS RAM */ 236 u16 boot_flags; /* IA-PC Boot Architecture Flags (see below for individual flags) */ 237 u8 reserved; /* Reserved, must be zero */ 238 u32 flags; /* Miscellaneous flag bits (see below for individual flags) */ 239 struct acpi_generic_address reset_register; /* 64-bit address of the Reset register */ 240 u8 reset_value; /* Value to write to the reset_register port to reset the system */ 241 u16 arm_boot_flags; /* ARM-Specific Boot Flags (see below for individual flags) (ACPI 5.1) */ 242 u8 minor_revision; /* FADT Minor Revision (ACPI 5.1) */ 243 u64 Xfacs; /* 64-bit physical address of FACS */ 244 u64 Xdsdt; /* 64-bit physical address of DSDT */ 245 struct acpi_generic_address xpm1a_event_block; /* 64-bit Extended Power Mgt 1a Event Reg Blk address */ 246 struct acpi_generic_address xpm1b_event_block; /* 64-bit Extended Power Mgt 1b Event Reg Blk address */ 247 struct acpi_generic_address xpm1a_control_block; /* 64-bit Extended Power Mgt 1a Control Reg Blk address */ 248 struct acpi_generic_address xpm1b_control_block; /* 64-bit Extended Power Mgt 1b Control Reg Blk address */ 249 struct acpi_generic_address xpm2_control_block; /* 64-bit Extended Power Mgt 2 Control Reg Blk address */ 250 struct acpi_generic_address xpm_timer_block; /* 64-bit Extended Power Mgt Timer Ctrl Reg Blk address */ 251 struct acpi_generic_address xgpe0_block; /* 64-bit Extended General Purpose Event 0 Reg Blk address */ 252 struct acpi_generic_address xgpe1_block; /* 64-bit Extended General Purpose Event 1 Reg Blk address */ 253 struct acpi_generic_address sleep_control; /* 64-bit Sleep Control register (ACPI 5.0) */ 254 struct acpi_generic_address sleep_status; /* 64-bit Sleep Status register (ACPI 5.0) */ 255 u64 hypervisor_id; /* Hypervisor Vendor ID (ACPI 6.0) */ 256 }; 257 258 /* Masks for FADT IA-PC Boot Architecture Flags (boot_flags) [Vx]=Introduced in this FADT revision */ 259 260 #define ACPI_FADT_LEGACY_DEVICES (1) /* 00: [V2] System has LPC or ISA bus devices */ 261 #define ACPI_FADT_8042 (1<<1) /* 01: [V3] System has an 8042 controller on port 60/64 */ 262 #define ACPI_FADT_NO_VGA (1<<2) /* 02: [V4] It is not safe to probe for VGA hardware */ 263 #define ACPI_FADT_NO_MSI (1<<3) /* 03: [V4] Message Signaled Interrupts (MSI) must not be enabled */ 264 #define ACPI_FADT_NO_ASPM (1<<4) /* 04: [V4] PCIe ASPM control must not be enabled */ 265 #define ACPI_FADT_NO_CMOS_RTC (1<<5) /* 05: [V5] No CMOS real-time clock present */ 266 267 #define FADT2_REVISION_ID 3 268 269 /* Masks for FADT ARM Boot Architecture Flags (arm_boot_flags) ACPI 5.1 */ 270 271 #define ACPI_FADT_PSCI_COMPLIANT (1) /* 00: [V5+] PSCI 0.2+ is implemented */ 272 #define ACPI_FADT_PSCI_USE_HVC (1<<1) /* 01: [V5+] HVC must be used instead of SMC as the PSCI conduit */ 273 274 /* Masks for FADT flags */ 275 276 #define ACPI_FADT_WBINVD (1) /* 00: [V1] The WBINVD instruction works properly */ 277 #define ACPI_FADT_WBINVD_FLUSH (1<<1) /* 01: [V1] WBINVD flushes but does not invalidate caches */ 278 #define ACPI_FADT_C1_SUPPORTED (1<<2) /* 02: [V1] All processors support C1 state */ 279 #define ACPI_FADT_C2_MP_SUPPORTED (1<<3) /* 03: [V1] C2 state works on MP system */ 280 #define ACPI_FADT_POWER_BUTTON (1<<4) /* 04: [V1] Power button is handled as a control method device */ 281 #define ACPI_FADT_SLEEP_BUTTON (1<<5) /* 05: [V1] Sleep button is handled as a control method device */ 282 #define ACPI_FADT_FIXED_RTC (1<<6) /* 06: [V1] RTC wakeup status is not in fixed register space */ 283 #define ACPI_FADT_S4_RTC_WAKE (1<<7) /* 07: [V1] RTC alarm can wake system from S4 */ 284 #define ACPI_FADT_32BIT_TIMER (1<<8) /* 08: [V1] ACPI timer width is 32-bit (0=24-bit) */ 285 #define ACPI_FADT_DOCKING_SUPPORTED (1<<9) /* 09: [V1] Docking supported */ 286 #define ACPI_FADT_RESET_REGISTER (1<<10) /* 10: [V2] System reset via the FADT RESET_REG supported */ 287 #define ACPI_FADT_SEALED_CASE (1<<11) /* 11: [V3] No internal expansion capabilities and case is sealed */ 288 #define ACPI_FADT_HEADLESS (1<<12) /* 12: [V3] No local video capabilities or local input devices */ 289 #define ACPI_FADT_SLEEP_TYPE (1<<13) /* 13: [V3] Must execute native instruction after writing SLP_TYPx register */ 290 #define ACPI_FADT_PCI_EXPRESS_WAKE (1<<14) /* 14: [V4] System supports PCIEXP_WAKE (STS/EN) bits (ACPI 3.0) */ 291 #define ACPI_FADT_PLATFORM_CLOCK (1<<15) /* 15: [V4] OSPM should use platform-provided timer (ACPI 3.0) */ 292 #define ACPI_FADT_S4_RTC_VALID (1<<16) /* 16: [V4] Contents of RTC_STS valid after S4 wake (ACPI 3.0) */ 293 #define ACPI_FADT_REMOTE_POWER_ON (1<<17) /* 17: [V4] System is compatible with remote power on (ACPI 3.0) */ 294 #define ACPI_FADT_APIC_CLUSTER (1<<18) /* 18: [V4] All local APICs must use cluster model (ACPI 3.0) */ 295 #define ACPI_FADT_APIC_PHYSICAL (1<<19) /* 19: [V4] All local xAPICs must use physical dest mode (ACPI 3.0) */ 296 #define ACPI_FADT_HW_REDUCED (1<<20) /* 20: [V5] ACPI hardware is not implemented (ACPI 5.0) */ 297 #define ACPI_FADT_LOW_POWER_S0 (1<<21) /* 21: [V5] S0 power savings are equal or better than S3 (ACPI 5.0) */ 298 299 /* Values for preferred_profile (Preferred Power Management Profiles) */ 300 301 enum acpi_preferred_pm_profiles { 302 PM_UNSPECIFIED = 0, 303 PM_DESKTOP = 1, 304 PM_MOBILE = 2, 305 PM_WORKSTATION = 3, 306 PM_ENTERPRISE_SERVER = 4, 307 PM_SOHO_SERVER = 5, 308 PM_APPLIANCE_PC = 6, 309 PM_PERFORMANCE_SERVER = 7, 310 PM_TABLET = 8, 311 NR_PM_PROFILES = 9 312 }; 313 314 /* Values for sleep_status and sleep_control registers (V5+ FADT) */ 315 316 #define ACPI_X_WAKE_STATUS 0x80 317 #define ACPI_X_SLEEP_TYPE_MASK 0x1C 318 #define ACPI_X_SLEEP_TYPE_POSITION 0x02 319 #define ACPI_X_SLEEP_ENABLE 0x20 320 321 /* Reset to default packing */ 322 323 #pragma pack() 324 325 /* 326 * Internal table-related structures 327 */ 328 union acpi_name_union { 329 u32 integer; 330 char ascii[4]; 331 }; 332 333 /* Internal ACPI Table Descriptor. One per ACPI table. */ 334 335 struct acpi_table_desc { 336 acpi_physical_address address; 337 struct acpi_table_header *pointer; 338 u32 length; /* Length fixed at 32 bits (fixed in table header) */ 339 union acpi_name_union signature; 340 acpi_owner_id owner_id; 341 u8 flags; 342 u16 validation_count; 343 }; 344 345 /* 346 * Maximum value of the validation_count field in struct acpi_table_desc. 347 * When reached, validation_count cannot be changed any more and the table will 348 * be permanently regarded as validated. 349 * 350 * This is to prevent situations in which unbalanced table get/put operations 351 * may cause premature table unmapping in the OS to happen. 352 * 353 * The maximum validation count can be defined to any value, but should be 354 * greater than the maximum number of OS early stage mapping slots to avoid 355 * leaking early stage table mappings to the late stage. 356 */ 357 #define ACPI_MAX_TABLE_VALIDATIONS ACPI_UINT16_MAX 358 359 /* Masks for Flags field above */ 360 361 #define ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL (0) /* Virtual address, external maintained */ 362 #define ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL (1) /* Physical address, internally mapped */ 363 #define ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL (2) /* Virtual address, internallly allocated */ 364 #define ACPI_TABLE_ORIGIN_MASK (3) 365 #define ACPI_TABLE_IS_VERIFIED (4) 366 #define ACPI_TABLE_IS_LOADED (8) 367 368 /* 369 * Get the remaining ACPI tables 370 */ 371 #include <acpi/actbl1.h> 372 #include <acpi/actbl2.h> 373 #include <acpi/actbl3.h> 374 375 /* Macros used to generate offsets to specific table fields */ 376 377 #define ACPI_FADT_OFFSET(f) (u16) ACPI_OFFSET (struct acpi_table_fadt, f) 378 379 /* 380 * Sizes of the various flavors of FADT. We need to look closely 381 * at the FADT length because the version number essentially tells 382 * us nothing because of many BIOS bugs where the version does not 383 * match the expected length. In other words, the length of the 384 * FADT is the bottom line as to what the version really is. 385 * 386 * For reference, the values below are as follows: 387 * FADT V1 size: 0x074 388 * FADT V2 size: 0x084 389 * FADT V3 size: 0x0F4 390 * FADT V4 size: 0x0F4 391 * FADT V5 size: 0x10C 392 * FADT V6 size: 0x114 393 */ 394 #define ACPI_FADT_V1_SIZE (u32) (ACPI_FADT_OFFSET (flags) + 4) 395 #define ACPI_FADT_V2_SIZE (u32) (ACPI_FADT_OFFSET (minor_revision) + 1) 396 #define ACPI_FADT_V3_SIZE (u32) (ACPI_FADT_OFFSET (sleep_control)) 397 #define ACPI_FADT_V5_SIZE (u32) (ACPI_FADT_OFFSET (hypervisor_id)) 398 #define ACPI_FADT_V6_SIZE (u32) (sizeof (struct acpi_table_fadt)) 399 400 #define ACPI_FADT_CONFORMANCE "ACPI 6.1 (FADT version 6)" 401 402 #endif /* __ACTBL_H__ */ 403