46 lines
937 B
C
46 lines
937 B
C
#ifndef ACPI_H_
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#define ACPI_H_
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#include <stdint.h>
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#define BIOS_START 0x000E0000
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#define BIOS_END 0x000FFFFF
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#define RSDP_SIG "RSD PTR "
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#define RSDP_SIG_LEN 8
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#define RSDP_SIZE 20
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#define ACPI_VER_1 0
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#define ACPI_VER_OTHER 2
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struct rsdp {
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char Signature[RSDP_SIG_LEN];
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uint8_t Checksum;
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char OEMID[6];
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uint8_t Revision;
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uint32_t RsdtAddress;
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} __attribute__ ((packed));
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struct ACPISDTHeader {
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char Signature[4];
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uint32_t Length;
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uint8_t Revision;
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uint8_t Checksum;
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char OEMID[6];
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char OEMTableID[8];
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uint32_t OEMRevision;
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uint32_t CreatorID;
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uint32_t CreatorRevision;
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};
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struct rsdt {
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struct ACPISDTHeader h;
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uint32_t other_sdt[];
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};
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struct rsdp *acpi_search_for_rsdp();
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int acpi_validate_rsdp_checksum(struct rsdp *s);
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int acpi_validate_sdt_checksum(struct ACPISDTHeader *s);
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struct ACPISDTHeader *acpi_find_table(struct rsdt *root, const char *signature);
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#endif
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