124 lines
3 KiB
C
124 lines
3 KiB
C
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/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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xxacpi.c
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Abstract:
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Implements various ACPI utility functions.
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Author:
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Jake Oshins (jakeo) 12-Feb-1997
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Environment:
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Kernel mode only.
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Revision History:
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--*/
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#include "halp.h"
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#include "acpitabl.h"
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#include "xxacpi.h"
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#include <inbv.h>
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extern PULONG KiBugCheckData;
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SLEEP_STATE_CONTEXT HalpShutdownContext;
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VOID
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HaliHaltSystem (
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VOID
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)
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/*++
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Routine Description:
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This procedure is called when the machine has crashed and is to be
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halted
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N.B.
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Will NOT return.
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--*/
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{
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for (; ;) {
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HalpCheckPowerButton();
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HalpYieldProcessor();
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}
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}
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VOID
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HalpCheckPowerButton (
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VOID
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)
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/*++
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Routine Description:
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This procedure is called when the machine is spinning in the debugger,
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or has crashed and halted.
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--*/
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{
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USHORT Pm1Status, Pm1Control;
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SLEEP_STATE_CONTEXT ShutdownContext;
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//
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// If there's been a bugcheck, or if the hal owns the display check
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// the fixed power button for an unconditional power off
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//
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if ((KiBugCheckData[0] || InbvCheckDisplayOwnership()) && HalpShutdownContext.AsULONG) {
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Pm1Status = READ_PORT_USHORT((PUSHORT) (ULONG_PTR)HalpFixedAcpiDescTable.pm1a_evt_blk_io_port);
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if (HalpFixedAcpiDescTable.pm1b_evt_blk_io_port) {
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Pm1Status |= READ_PORT_USHORT((PUSHORT) (ULONG_PTR)HalpFixedAcpiDescTable.pm1b_evt_blk_io_port);
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}
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//
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// If the fixed button has been pushed, power off the system
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//
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if (Pm1Status & PM1_PWRBTN_STS) {
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//
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// Only do this once
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//
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ShutdownContext = HalpShutdownContext;
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HalpShutdownContext.AsULONG = 0;
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//
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// Disable & eoi all wake events
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//
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AcpiEnableDisableGPEvents(FALSE);
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WRITE_PORT_USHORT((PUSHORT) (ULONG_PTR)HalpFixedAcpiDescTable.pm1a_evt_blk_io_port, Pm1Status);
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if (HalpFixedAcpiDescTable.pm1b_evt_blk_io_port) {
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WRITE_PORT_USHORT((PUSHORT) (ULONG_PTR)HalpFixedAcpiDescTable.pm1b_evt_blk_io_port, Pm1Status);
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}
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//
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// Power off
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//
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Pm1Control = READ_PORT_USHORT((PUSHORT) (ULONG_PTR)HalpFixedAcpiDescTable.pm1a_ctrl_blk_io_port);
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Pm1Control = (USHORT) ((Pm1Control & CTL_PRESERVE) | (ShutdownContext.bits.Pm1aVal << SLP_TYP_SHIFT) | SLP_EN);
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WRITE_PORT_USHORT ((PUSHORT) (ULONG_PTR)HalpFixedAcpiDescTable.pm1a_ctrl_blk_io_port, Pm1Control);
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if (HalpFixedAcpiDescTable.pm1b_ctrl_blk_io_port) {
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Pm1Control = READ_PORT_USHORT((PUSHORT) (ULONG_PTR)HalpFixedAcpiDescTable.pm1b_ctrl_blk_io_port);
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Pm1Control = (USHORT) ((Pm1Control & CTL_PRESERVE) | (ShutdownContext.bits.Pm1bVal << SLP_TYP_SHIFT) | SLP_EN);
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WRITE_PORT_USHORT ((PUSHORT) (ULONG_PTR)HalpFixedAcpiDescTable.pm1b_ctrl_blk_io_port, Pm1Control);
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}
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}
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}
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}
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