diff options
Diffstat (limited to 'include/sys/acpi.h')
| -rw-r--r-- | include/sys/acpi.h | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/include/sys/acpi.h b/include/sys/acpi.h new file mode 100644 index 0000000..97eeab9 --- /dev/null +++ b/include/sys/acpi.h @@ -0,0 +1,177 @@ +#pragma once + +#include <stdint.h> + +#ifndef ACPI_INTERNAL + #error "Do not include <sys/acpi.h>, only use <acpi.h>" +#endif + +struct acpi_header { + uint32_t signature; + uint32_t length; + uint8_t revision; + uint8_t checksum; + uint8_t oem_id[6]; + uint8_t oem_table_id[8]; + uint32_t oem_revision; + uint32_t creator_id; + uint32_t creator_revision; +} __attribute__((packed)); + +// root system descriptor pointer +// ACPI 1.0 +struct rsdp { + uint8_t signature[8]; + uint8_t checksum; + uint8_t oemid[6]; + uint8_t revision; + uint32_t rsdt_addr; +} __attribute__((packed)); + +// eXtended system descriptor pointer +// ACPI 2.0 +struct xsdp { + char signature[8]; + uint8_t checksum; + char oemid[6]; + uint8_t revision; + uint32_t rsdt_addr; + uint32_t length; + uint64_t xsdt_addr; + uint8_t extendeid_checksum; + uint8_t reserved[3]; +} __attribute__((packed)); + +// root system descriptor table +// ACPI 1.0 +struct rsdt { + struct acpi_header h; + uint32_t sdt_pointers[]; +} __attribute__((packed)); + +// eXtended system descriptor table +// ACPI 2.0 +struct xsdt { + struct acpi_header h; + uint64_t sdt_pointers[]; +} __attribute__((packed)); + + +// generic address structure +struct gas { + uint8_t address_space; + uint8_t bit_width; + uint8_t bit_offset; + uint8_t access_size; + uint64_t address; +}; + +// differentiated system description table +struct dsdt { + struct acpi_header h; + char s5_addr[]; +} __attribute__((packed)); + +struct apic { + struct acpi_header h; + // todo +} __attribute__((packed)); + +struct hept { + struct acpi_header h; + // todo +} __attribute__((packed)); + +struct waet { + struct acpi_header h; + // todo +} __attribute__((packed)); + +// fixed acpi description table +struct fadt { + struct acpi_header h; + uint32_t firmware_ctrl; + uint32_t dsdt; + + // field used in ACPI 1.0; no longer in use, for compatibility only + uint8_t reserved; + + uint8_t preferred_power_management_profile; + uint16_t sci_interrupt; + uint32_t smi_command_port; + uint8_t acpi_enable; + uint8_t acpi_disable; + uint8_t s4bios_req; + uint8_t pstate_control; + uint32_t pm1_a_event_block; + uint32_t pm1_b_event_block; + uint32_t pm1_a_control_block; + uint32_t pm1_b_control_block; + uint32_t pm2_control_block; + uint32_t pm_timer_block; + uint32_t gpe0_block; + uint32_t gpe1_block; + uint8_t pm1_event_length; + uint8_t pm1_control_length; + uint8_t pm2_control_length; + uint8_t pm_timer_length; + uint8_t gpe0_length; + uint8_t gpe1_length; + uint8_t gpe1_base; + uint8_t cstate_control; + uint16_t worst_c2_latency; + uint16_t worst_c3_latency; + uint16_t flush_size; + uint16_t flush_stride; + uint8_t duty_offset; + uint8_t duty_width; + uint8_t day_alarm; + uint8_t month_alarm; + uint8_t century; + + // reserved in ACPI 1.0; used since ACPI 2.0+ + uint16_t boot_architecture_flags; + + uint8_t reserved_2; + uint32_t flags; + + // 12 byte structure; see below for details + struct gas reset_reg; + + uint8_t reset_value; + uint8_t reserved_3[3]; + + // 64bit pointers - Available on ACPI 2.0+ + uint64_t x_firmware_control; + uint64_t x_dsdt; + + struct gas x_pm1_a_event_block; + struct gas x_pm1_b_event_block; + struct gas x_pm1_a_control_block; + struct gas x_pm1_b_control_block; + struct gas x_pm2_control_block; + struct gas x_pm_timer_block; + struct gas x_gpe0_block; + struct gas x_gpe1_block; +} __attribute__((packed)); + +struct acpi_state { + union { + struct xsdt *xsdt; + struct rsdt *rsdt; + } sdt; + struct fadt *fadt; + struct dsdt *dsdt; + struct apic *apic; + struct hept *hept; + struct waet *waet; + uint8_t version; + + uint16_t SLP_TYPa; + uint16_t SLP_TYPb; + uint16_t SLP_EN; + uint16_t SCI_EN; +}; + +void acpi_sys_enable(struct acpi_state *state); +int acpi_sys_shutdown(struct acpi_state *state); |