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#ifndef _ACPI_H_
#define _ACPI_H_
#include <stdint.h>
#include <stddef.h>
struct rsdp {
char signature[8];
uint8_t checksum;
char oemid[6];
uint8_t revision;
uint32_t rsdt_address;
} __attribute__((packed));
struct xsdp {
char signature[8];
uint8_t checksum;
char oemid[6];
uint8_t revision;
uint32_t rsdt_address; // deprecated since version 2.0
uint32_t length;
uint64_t xsdt_address;
uint8_t extended_checksum;
uint8_t reserved[3];
} __attribute__((packed));
struct acpi_sdt_header {
char signature[4];
uint32_t len;
uint8_t rev;
uint8_t checksum;
char oemid[6];
char oem_tableid[8];
uint32_t oem_revision;
uint32_t creatorid;
uint32_t creator_rev;
} __attribute__((packed));
struct rsdt {
struct acpi_sdt_header header;
uint32_t sdt_pointers[];
} __attribute__((packed));
struct xsdt {
struct acpi_sdt_header header;
uint64_t sdt_pointers[];
} __attribute__((packed));
struct generic_address {
uint8_t address_space;
uint8_t bid_width;
uint8_t bit_offset;
uint8_t access_size;
uint64_t address;
} __attribute__((packed));
struct fadt {
struct acpi_sdt_header header;
uint32_t firmware_ctrl;
uint32_t dsdt;
uint8_t reserved;
uint8_t prevered_power_management_profile;
uint16_t sci_interrupt;
uint32_t smi_command_port;
uint8_t acpi_enable;
uint8_t acpi_disable;
uint8_t s4_bios_req;
uint8_t pstate_control;
uint32_t pm1a_event_block;
uint32_t pm1b_event_block;
uint32_t pm1a_control_block;
uint32_t pm1b_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;
uint16_t boot_arch_flags;
uint8_t reserved_2;
uint32_t flags;
struct generic_address reset_reg;
uint8_t reset_valued;
uint8_t reserved_3[3];
uint64_t x_firmware_control;
uint64_t x_dsdt;
struct generic_address x_pm1a_event_block;
struct generic_address x_pm1b_event_block;
struct generic_address x_pm1a_control_block;
struct generic_address x_pm1b_control_block;
struct generic_address x_pm2_control_block;
struct generic_address x_pm_timer_block;
struct generic_address x_gpe0_block;
struct generic_address x_gpe1_block;
} __attribute__((packed));
struct xsdp *find_rsdp();
struct fadt *find_facp(struct xsdt *root_sdt);
void print_rsdp(const struct rsdp *rsdp);
static inline struct xsdt *get_rsdt(struct xsdp *rsdp) {
if (rsdp == NULL || rsdp->revision == 0)
return NULL;
return (struct xsdt *) rsdp->xsdt_address;
}
#endif
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