102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
#ifndef __LIB__ACPI_H__
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#define __LIB__ACPI_H__
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#include <stdint.h>
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#include <stddef.h>
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#define EBDA ((size_t)(*((uint16_t *)0x40e)) * 16)
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struct sdt {
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char signature[4];
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uint32_t length;
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uint8_t rev;
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uint8_t checksum;
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char oem_id[6];
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char oem_table_id[8];
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uint32_t oem_rev;
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char creator_id[4];
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uint32_t creator_rev;
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} __attribute__((packed));
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struct rsdp {
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char signature[8];
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uint8_t checksum;
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char oem_id[6];
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uint8_t rev;
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uint32_t rsdt_addr;
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// Revision 2 only after this comment
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uint32_t length;
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uint64_t xsdt_addr;
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uint8_t ext_checksum;
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uint8_t reserved[3];
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} __attribute__((packed));
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struct rsdt {
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struct sdt header;
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char ptrs_start[];
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} __attribute__((packed));
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struct smbios_entry_point_32 {
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char anchor_str[4];
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/// This value summed with all the values of the table.
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uint8_t checksum;
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/// Length of the entry point table.
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uint8_t length;
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/// Major version of SMBIOS.
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uint8_t major_version;
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/// Minor version of SMBIOS.
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uint8_t minor_version;
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/// Size of the largest SMBIOS structure, in bytes, and encompasses the
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/// structure’s formatted area and text strings
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uint16_t max_structure_size;
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uint8_t entry_point_revision;
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char formatted_area[5];
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char intermediate_anchor_str[5];
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/// Checksum for values from intermediate anchor str to the
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/// end of table.
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uint8_t intermediate_checksum;
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/// Total length of SMBIOS Structure Table, pointed to by the structure
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/// table address, in bytes.
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uint16_t table_length;
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/// 32-bit physical starting address of the read-only SMBIOS Structure
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/// Table.
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uint32_t table_address;
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/// Total number of structures present in the SMBIOS Structure Table.
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uint16_t number_of_structures;
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/// Indicates compliance with a revision of this specification.
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uint8_t bcd_revision;
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} __attribute__((packed));
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struct smbios_entry_point_64 {
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char anchor_str[5];
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/// This value summed with all the values of the table.
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uint8_t checksum;
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/// Length of the entry point table.
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uint8_t length;
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/// Major version of SMBIOS.
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uint8_t major_version;
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/// Minor version of SMBIOS.
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uint8_t minor_version;
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uint8_t docrev;
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uint8_t entry_point_revision;
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uint8_t reserved;
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/// Size of the largest SMBIOS structure, in bytes, and encompasses the
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/// structure’s formatted area and text strings
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uint16_t max_structure_size;
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/// 64-bit physical starting address of the read-only SMBIOS Structure
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/// Table.
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uint64_t table_address;
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} __attribute__((packed));
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uint8_t acpi_checksum(void *ptr, size_t size);
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void *acpi_get_rsdp(void);
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void *acpi_get_rsdp_v1(void);
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void *acpi_get_rsdp_v2(void);
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void *acpi_get_table(const char *signature, int index);
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void acpi_get_smbios(void **smbios32, void **smbios64);
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#endif
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