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-rw-r--r--src/arch/x86/include/arch/acpi.h32
1 files changed, 12 insertions, 20 deletions
diff --git a/src/arch/x86/include/arch/acpi.h b/src/arch/x86/include/arch/acpi.h
index aced58aa62..b3a5ce796a 100644
--- a/src/arch/x86/include/arch/acpi.h
+++ b/src/arch/x86/include/arch/acpi.h
@@ -90,14 +90,13 @@ typedef struct acpi_rsdp {
char signature[8]; /* RSDP signature */
u8 checksum; /* Checksum of the first 20 bytes */
char oem_id[6]; /* OEM ID */
- u8 revision; /* 0 for ACPI 1.0, 2 for ACPI 2.0/3.0/4.0/6.2a */
+ u8 revision; /* RSDP revision */
u32 rsdt_address; /* Physical address of RSDT (32 bits) */
u32 length; /* Total RSDP length (incl. extended part) */
u64 xsdt_address; /* Physical address of XSDT (64 bits) */
u8 ext_checksum; /* Checksum of the whole table */
u8 reserved[3];
} __packed acpi_rsdp_t;
-/* Note: ACPI 1.0 didn't have length, xsdt_address, and ext_checksum. */
/* GAS (Generic Address Structure) */
typedef struct acpi_gen_regaddr {
@@ -106,9 +105,7 @@ typedef struct acpi_gen_regaddr {
u8 bit_offset; /* Register bit offset */
union {
u8 resv; /* Reserved in ACPI 2.0 - 2.0b */
- u8 access_size; /* Access size in
- * ACPI 2.0c/3.0/4.0/5.0/6.2a
- */
+ u8 access_size; /* Access size since ACPI 2.0c */
};
u32 addrl; /* Register address, low 32 bits */
u32 addrh; /* Register address, high 32 bits */
@@ -484,11 +481,7 @@ typedef struct acpi_fadt {
struct acpi_table_header header;
u32 firmware_ctrl;
u32 dsdt;
- u8 reserved; /* Eliminated in ACPI 2.0. Platforms should set
- * this field to zero but field values of one
- * are also allowed to maintain compatibility
- * with ACPI 1.0.
- */
+ u8 reserved; /* Should be 0 */
u8 preferred_pm_profile;
u16 sci_int;
u32 smi_cmd;
@@ -578,7 +571,7 @@ typedef struct acpi_fadt {
/* Bits 20-31: reserved ACPI 3.0 & 4.0 */
#define ACPI_FADT_HW_REDUCED_ACPI (1 << 20)
#define ACPI_FADT_LOW_PWR_IDLE_S0 (1 << 21)
-/* bits 22-31: reserved ACPI 5.0/6.2a */
+/* bits 22-31: reserved since ACPI 5.0 */
/* FADT Boot Architecture Flags */
#define ACPI_FADT_LEGACY_DEVICES (1 << 0)
@@ -592,7 +585,7 @@ typedef struct acpi_fadt {
/* FADT ARM Boot Architecture Flags */
#define ACPI_FADT_ARM_PSCI_COMPLIANT (1 << 0)
#define ACPI_FADT_ARM_PSCI_USE_HVC (1 << 1)
-/* bits 2-16: reserved ACPI 6.2a */
+/* bits 2-16: reserved since ACPI 5.1 */
/* FADT Preferred Power Management Profile */
enum acpi_preferred_pm_profiles {
@@ -604,7 +597,7 @@ enum acpi_preferred_pm_profiles {
PM_SOHO_SERVER = 5,
PM_APPLIANCE_PC = 6,
PM_PERFORMANCE_SERVER = 7,
- PM_TABLET = 8, /* ACPI 5.0/6.2a */
+ PM_TABLET = 8, /* ACPI 5.0 & greater */
};
/* FACS (Firmware ACPI Control Structure) */
@@ -617,10 +610,10 @@ typedef struct acpi_facs {
u32 flags; /* FACS flags */
u32 x_firmware_waking_vector_l; /* X FW waking vector, low */
u32 x_firmware_waking_vector_h; /* X FW waking vector, high */
- u8 version; /* ACPI 6.2-A: 2 */
- u8 resv1[3]; /* ACPI 6.2-A: 0 */
+ u8 version; /* FACS version */
+ u8 resv1[3]; /* This value is 0 */
u32 ospm_flags; /* 64BIT_WAKE_F */
- u8 resv2[24]; /* ACPI 6.2-A: 0 */
+ u8 resv2[24]; /* This value is 0 */
} __packed acpi_facs_t;
/* FACS flags */
@@ -678,7 +671,7 @@ typedef struct acpi_bert {
u64 error_region;
} __packed acpi_bert_t;
-/* Generic Error Data Entry (ACPI spec v6.2-A, table 382) */
+/* Generic Error Data Entry */
typedef struct acpi_hest_generic_data {
guid_t section_type;
u32 error_severity;
@@ -691,7 +684,7 @@ typedef struct acpi_hest_generic_data {
/* error data */
} __packed acpi_hest_generic_data_t;
-/* Generic Error Data Entry (ACPI spec v6.2-A, table 382) */
+/* Generic Error Data Entry v300 */
typedef struct acpi_hest_generic_data_v300 {
guid_t section_type;
u32 error_severity;
@@ -717,7 +710,7 @@ typedef struct acpi_hest_generic_data_v300 {
#define ACPI_GENERROR_VALID_FRUID_TEXT BIT(1)
#define ACPI_GENERROR_VALID_TIMESTAMP BIT(2)
-/* Generic Error Status Block (ACPI spec v6.2-A, table 381) */
+/* Generic Error Status Block */
typedef struct acpi_generic_error_status {
u32 block_status;
u32 raw_data_offset; /* must follow any generic entries */
@@ -755,7 +748,6 @@ typedef struct acpi_tstate {
/* Port types for ACPI _UPC object */
enum acpi_upc_type {
- /* These types are defined in ACPI 6.2 section 9.14 */
UPC_TYPE_A,
UPC_TYPE_MINI_AB,
UPC_TYPE_EXPRESSCARD,