src/acpi.h

   1 #ifndef __ACPI_H
   2 #define __ACPI_H
   3
   4 #include "types.h" // u32
   5
   6 void acpi_bios_init(void);
   7
   8 // XXX - move to better header.
   9 extern int smp_cpus;
  10
  11 #define RSDP_SIGNATURE 0x2052545020445352LL // "RSD PTR "
  12
  13 struct rsdp_descriptor         /* Root System Descriptor Pointer */
  14 {
  15         u8                            signature [8];          /* ACPI signature, contains "RSD PTR " */
  16         u8                              checksum;               /* To make sum of struct == 0 */
  17         u8                            oem_id [6];             /* OEM identification */
  18         u8                              revision;               /* Must be 0 for 1.0, 2 for 2.0 */
  19         u32                             rsdt_physical_address;  /* 32-bit physical address of RSDT */
  20         u32                             length;                 /* XSDT Length in bytes including hdr */
  21         u64                             xsdt_physical_address;  /* 64-bit physical address of XSDT */
  22         u8                              extended_checksum;      /* Checksum of entire table */
  23         u8                            reserved [3];           /* Reserved field must be 0 */
  24 };
  25
  26 // XXX - not really part of acpi.
  27 struct mptable_floating_s {
  28     u32 signature;
  29     u32 physaddr;
  30     u8 length;
  31     u8 spec_rev;
  32     u8 checksum;
  33     u8 feature1;
  34     u8 feature2;
  35     u8 reserved[3];
  36 };
  37
  38 #define MPTABLE_SIGNAURE 0x5f504d5f  // "_MP_"
  39
  40 #endif // acpi.h