structs.h

struct rsdp {
  CHAR8 sig[8];
  UINT8 Checksum;
  CHAR8 OEMID[6];
  UINT8 Revision;
  UINT32 RsdtAddress;
  UINT32 Len;
  UINT64 XsdtAddress;
  UINT8 ExtChecksum;
  UINT8 reserved[3];
};

struct sdt_header {
  CHAR8 sig[4];
  UINT32 len;
  UINT8 rev;
  UINT8 chksum;
  CHAR8 OEMID[6];
  CHAR8 tableid[8];
  UINT32 OEMrev;
  UINT32 creatorID;
  UINT32 creatorRev;
};

struct __attribute__((packed)) xsdt {
  struct sdt_header h;
  UINT64 pointer_others[];
};

struct __attribute__((packed)) madt {
  struct sdt_header h;
  UINT32 lapic_addr;
  UINT32 flags;
};