diff options
Diffstat (limited to 'src/include/acpi')
| -rw-r--r-- | src/include/acpi/acpi.h | 49 |
1 files changed, 48 insertions, 1 deletions
diff --git a/src/include/acpi/acpi.h b/src/include/acpi/acpi.h index 1c364a0ee8..e266a2d668 100644 --- a/src/include/acpi/acpi.h +++ b/src/include/acpi/acpi.h @@ -71,7 +71,7 @@ enum coreboot_acpi_ids { enum acpi_tables { /* Tables defined by ACPI and used by coreboot */ BERT, DBG2, DMAR, DSDT, FACS, FADT, HEST, HPET, IVRS, MADT, MCFG, - RSDP, RSDT, SLIT, SRAT, SSDT, TCPA, TPM2, XSDT, ECDT, + RSDP, RSDT, SLIT, SRAT, SSDT, TCPA, TPM2, XSDT, ECDT, LPIT, /* Additional proprietary tables used by coreboot */ VFCT, NHLT, SPMI, CRAT }; @@ -257,6 +257,48 @@ typedef struct acpi_madt { u32 flags; /* Multiple APIC flags */ } __packed acpi_madt_t; +/* + * LPIT (Low Power Idle Table) + * Conforms to "Intel Low Power S0 Idle" specification, rev 002 from July 2017. + */ +typedef struct acpi_lpit { + acpi_header_t header; +} __packed acpi_lpit_t; + +/* LPIT: LPI descriptor flags */ +typedef struct acpi_lpi_flags { + uint32_t disabled : 1; + uint32_t counter_not_available : 1; + uint32_t reserved : 30; +} __packed acpi_lpi_desc_flags_t; + +/* LPIT: LPI descriptor types */ +enum acpi_lpi_desc_type { + ACPI_LPI_DESC_TYPE_NATIVE_CSTATE = 0x00, + /* type >= 1 reserved */ +}; + +/* LPIT: LPI descriptor header */ +typedef struct acpi_lpi_desc_hdr { + uint32_t type; + uint32_t length; + uint16_t uid; + uint16_t reserved; +} __packed acpi_lpi_desc_hdr_t; + +#define ACPI_LPIT_CTR_FREQ_TSC 0 + +/* LPIT: Native C-state instruction based LPI structure */ +typedef struct acpi_lpi_desc_ncst { + acpi_lpi_desc_hdr_t header; + acpi_lpi_desc_flags_t flags; + acpi_addr_t entry_trigger; /* Entry trigger C-state */ + uint32_t min_residency; /* Minimum residency or "break-even" in microseconds */ + uint32_t max_latency; /* Worst case exit latency in microseconds */ + acpi_addr_t residency_counter; + uint64_t counter_frequency; /* Frequency in cycles per second - 0 means TSC freq */ +} __packed acpi_lpi_desc_ncst_t; + /* VFCT image header */ typedef struct acpi_vfct_image_hdr { u32 PCIBus; @@ -922,6 +964,8 @@ void mainboard_fill_fadt(acpi_fadt_t *fadt); void update_ssdt(void *ssdt); void update_ssdtx(void *ssdtx, int i); +unsigned long acpi_fill_lpit(unsigned long current); + /* These can be used by the target port. */ u8 acpi_checksum(u8 *table, u32 length); @@ -1025,6 +1069,9 @@ void acpi_write_hest(acpi_hest_t *hest, unsigned long acpi_create_hest_error_source(acpi_hest_t *hest, acpi_hest_esd_t *esd, u16 type, void *data, u16 len); +void acpi_create_lpit(acpi_lpit_t *lpit); +unsigned long acpi_create_lpi_desc_ncst(acpi_lpi_desc_ncst_t *lpi_desc, uint16_t uid); + /* For ACPI S3 support. */ void __noreturn acpi_resume(void *wake_vec); void mainboard_suspend_resume(void); |