arch/x86/cpu/qemu/acpi/hpet.asl

   1 /* HPET */
   2
   3 Scope(\_SB) {
   4     Device(HPET) {
   5         Name(_HID, EISAID("PNP0103"))
   6         Name(_UID, 0)
   7         OperationRegion(HPTM, SystemMemory, 0xfed00000, 0x400)
   8         Field(HPTM, DWordAcc, Lock, Preserve) {
   9             VEND, 32,
  10             PRD, 32,
  11         }
  12         Method(_STA, 0, NotSerialized) {
  13             Store(VEND, Local0)
  14             Store(PRD, Local1)
  15             ShiftRight(Local0, 16, Local0)
  16             If (LOr(LEqual(Local0, 0), LEqual(Local0, 0xffff))) {
  17                 Return (0x0)
  18             }
  19             If (LOr(LEqual(Local1, 0), LGreater(Local1, 100000000))) {
  20                 Return (0x0)
  21             }
  22             Return (0x0f)
  23         }
  24         Name(_CRS, ResourceTemplate() {
  25             Memory32Fixed(ReadOnly,
  26                 0xfed00000,         /* Address Base */
  27                 0x00000400,         /* Address Length */
  28                 )
  29         })
  30     }
  31 }