include/acpi/actbl.h

   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 - 2020, 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];      /* 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];  /* ASCII OEM identification */
  74         char oem_table_id[ACPI_OEM_TABLE_ID_SIZE];      /* ASCII OEM table identification */
  75         u32 oem_revision;       /* OEM revision number */
  76         char asl_compiler_id[ACPI_NAMESEG_SIZE];        /* 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 };
 312
 313 /* Values for sleep_status and sleep_control registers (V5+ FADT) */
 314
 315 #define ACPI_X_WAKE_STATUS          0x80
 316 #define ACPI_X_SLEEP_TYPE_MASK      0x1C
 317 #define ACPI_X_SLEEP_TYPE_POSITION  0x02
 318 #define ACPI_X_SLEEP_ENABLE         0x20
 319
 320 /* Reset to default packing */
 321
 322 #pragma pack()
 323
 324 /*
 325  * Internal table-related structures
 326  */
 327 union acpi_name_union {
 328         u32 integer;
 329         char ascii[4];
 330 };
 331
 332 /* Internal ACPI Table Descriptor. One per ACPI table. */
 333
 334 struct acpi_table_desc {
 335         acpi_physical_address address;
 336         struct acpi_table_header *pointer;
 337         u32 length;             /* Length fixed at 32 bits (fixed in table header) */
 338         union acpi_name_union signature;
 339         acpi_owner_id owner_id;
 340         u8 flags;
 341         u16 validation_count;
 342 };
 343
 344 /*
 345  * Maximum value of the validation_count field in struct acpi_table_desc.
 346  * When reached, validation_count cannot be changed any more and the table will
 347  * be permanently regarded as validated.
 348  *
 349  * This is to prevent situations in which unbalanced table get/put operations
 350  * may cause premature table unmapping in the OS to happen.
 351  *
 352  * The maximum validation count can be defined to any value, but should be
 353  * greater than the maximum number of OS early stage mapping slots to avoid
 354  * leaking early stage table mappings to the late stage.
 355  */
 356 #define ACPI_MAX_TABLE_VALIDATIONS          ACPI_UINT16_MAX
 357
 358 /* Masks for Flags field above */
 359
 360 #define ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL  (0) /* Virtual address, external maintained */
 361 #define ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL (1) /* Physical address, internally mapped */
 362 #define ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL  (2) /* Virtual address, internallly allocated */
 363 #define ACPI_TABLE_ORIGIN_MASK              (3)
 364 #define ACPI_TABLE_IS_VERIFIED              (4)
 365 #define ACPI_TABLE_IS_LOADED                (8)
 366
 367 /*
 368  * Get the remaining ACPI tables
 369  */
 370 #include <acpi/actbl1.h>
 371 #include <acpi/actbl2.h>
 372 #include <acpi/actbl3.h>
 373
 374 /* Macros used to generate offsets to specific table fields */
 375
 376 #define ACPI_FADT_OFFSET(f)             (u16) ACPI_OFFSET (struct acpi_table_fadt, f)
 377
 378 /*
 379  * Sizes of the various flavors of FADT. We need to look closely
 380  * at the FADT length because the version number essentially tells
 381  * us nothing because of many BIOS bugs where the version does not
 382  * match the expected length. In other words, the length of the
 383  * FADT is the bottom line as to what the version really is.
 384  *
 385  * For reference, the values below are as follows:
 386  *     FADT V1 size: 0x074
 387  *     FADT V2 size: 0x084
 388  *     FADT V3 size: 0x0F4
 389  *     FADT V4 size: 0x0F4
 390  *     FADT V5 size: 0x10C
 391  *     FADT V6 size: 0x114
 392  */
 393 #define ACPI_FADT_V1_SIZE       (u32) (ACPI_FADT_OFFSET (flags) + 4)
 394 #define ACPI_FADT_V2_SIZE       (u32) (ACPI_FADT_OFFSET (minor_revision) + 1)
 395 #define ACPI_FADT_V3_SIZE       (u32) (ACPI_FADT_OFFSET (sleep_control))
 396 #define ACPI_FADT_V5_SIZE       (u32) (ACPI_FADT_OFFSET (hypervisor_id))
 397 #define ACPI_FADT_V6_SIZE       (u32) (sizeof (struct acpi_table_fadt))
 398
 399 #define ACPI_FADT_CONFORMANCE   "ACPI 6.1 (FADT version 6)"
 400
 401 #endif                          /* __ACTBL_H__ */