hw/i386/acpi-dsdt-hpet.dsl

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11
  12  * You should have received a copy of the GNU General Public License along
  13  * with this program; if not, see <http://www.gnu.org/licenses/>.
  14  */
  15
  16 /****************************************************************
  17  * HPET
  18  ****************************************************************/
  19
  20 Scope(\_SB) {
  21     Device(HPET) {
  22         Name(_HID, EISAID("PNP0103"))
  23         Name(_UID, 0)
  24         OperationRegion(HPTM, SystemMemory, 0xFED00000, 0x400)
  25         Field(HPTM, DWordAcc, Lock, Preserve) {
  26             VEND, 32,
  27             PRD, 32,
  28         }
  29         Method(_STA, 0, NotSerialized) {
  30             Store(VEND, Local0)
  31             Store(PRD, Local1)
  32             ShiftRight(Local0, 16, Local0)
  33             If (LOr(LEqual(Local0, 0), LEqual(Local0, 0xffff))) {
  34                 Return (0x0)
  35             }
  36             If (LOr(LEqual(Local1, 0), LGreater(Local1, 100000000))) {
  37                 Return (0x0)
  38             }
  39             Return (0x0F)
  40         }
  41         Name(_CRS, ResourceTemplate() {
  42 #if 0       /* This makes WinXP BSOD for not yet figured reasons. */
  43             IRQNoFlags() {2, 8}
  44 #endif
  45             Memory32Fixed(ReadOnly,
  46                 0xFED00000,         // Address Base
  47                 0x00000400,         // Address Length
  48                 )
  49         })
  50     }
  51 }