limine/common/lib/acpi.h

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2020-03-26 03:37:56 +03:00
#ifndef __LIB__ACPI_H__
#define __LIB__ACPI_H__
#include <stdint.h>
#include <stddef.h>
#include <sys/cpu.h>
#define EBDA (ebda_get())
#if defined (BIOS)
static inline uintptr_t ebda_get(void) {
uintptr_t ebda = (uintptr_t)mminw(0x40e) << 4;
// Sanity checks
if (ebda < 0x80000 || ebda >= 0xa0000) {
ebda = 0x80000;
}
return ebda;
}
#endif
struct sdt {
char signature[4];
uint32_t length;
uint8_t rev;
uint8_t checksum;
char oem_id[6];
char oem_table_id[8];
uint32_t oem_rev;
char creator_id[4];
uint32_t creator_rev;
} __attribute__((packed));
struct rsdp {
char signature[8];
uint8_t checksum;
char oem_id[6];
uint8_t rev;
uint32_t rsdt_addr;
// Revision 2 only after this comment
uint32_t length;
uint64_t xsdt_addr;
uint8_t ext_checksum;
uint8_t reserved[3];
} __attribute__((packed));
struct rsdt {
struct sdt header;
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char ptrs_start[];
} __attribute__((packed));
struct smbios_entry_point_32 {
char anchor_str[4];
/// This value summed with all the values of the table.
uint8_t checksum;
/// Length of the entry point table.
uint8_t length;
/// Major version of SMBIOS.
uint8_t major_version;
/// Minor version of SMBIOS.
uint8_t minor_version;
/// Size of the largest SMBIOS structure, in bytes, and encompasses the
/// structures formatted area and text strings
uint16_t max_structure_size;
uint8_t entry_point_revision;
char formatted_area[5];
char intermediate_anchor_str[5];
/// Checksum for values from intermediate anchor str to the
/// end of table.
uint8_t intermediate_checksum;
/// Total length of SMBIOS Structure Table, pointed to by the structure
/// table address, in bytes.
uint16_t table_length;
/// 32-bit physical starting address of the read-only SMBIOS Structure
/// Table.
uint32_t table_address;
/// Total number of structures present in the SMBIOS Structure Table.
uint16_t number_of_structures;
/// Indicates compliance with a revision of this specification.
uint8_t bcd_revision;
} __attribute__((packed));
struct smbios_entry_point_64 {
char anchor_str[5];
/// This value summed with all the values of the table.
uint8_t checksum;
/// Length of the entry point table.
uint8_t length;
/// Major version of SMBIOS.
uint8_t major_version;
/// Minor version of SMBIOS.
uint8_t minor_version;
uint8_t docrev;
uint8_t entry_point_revision;
uint8_t reserved;
/// Size of the largest SMBIOS structure, in bytes, and encompasses the
/// structures formatted area and text strings
uint16_t max_structure_size;
/// 64-bit physical starting address of the read-only SMBIOS Structure
/// Table.
uint64_t table_address;
} __attribute__((packed));
uint8_t acpi_checksum(void *ptr, size_t size);
void *acpi_get_rsdp(void);
void *acpi_get_rsdp_v1(void);
void *acpi_get_rsdp_v2(void);
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void *acpi_get_table(const char *signature, int index);
void acpi_get_smbios(void **smbios32, void **smbios64);
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#endif