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windows-nt/Source/XPSP1/NT/base/hals/halia64/ia64/pmsleep.c

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/*++
Copyright (c) 1997 Microsoft Corporation
Module Name:
pmsleep.c
Abstract:
This file provides the code that changes the system from
the ACPI S0 (running) state to any one of the sleep states.
Author:
Jake Oshins (jakeo) Feb. 11, 1997
Revision History:
Todd Kjos (HP) (v-tkjos) 1-Jun-1998: Initial port to IA64
--*/
#include "halp.h"
#include "acpitabl.h"
#include "xxacpi.h"
#include "ixsleep.h"
#include "kddll.h"
//
// Internal functions
//
VOID
HalpLockedIncrementUlong(
PULONG SyncVariable
);
VOID
HalpReboot (
VOID
);
NTSTATUS
HaliAcpiFakeSleep(
IN PVOID Context,
IN PENTER_STATE_SYSTEM_HANDLER SystemHandler OPTIONAL,
IN PVOID SystemContext,
IN LONG NumberProcessors,
IN volatile PLONG Number
);
NTSTATUS
HaliAcpiSleep(
IN PVOID Context,
IN PENTER_STATE_SYSTEM_HANDLER SystemHandler OPTIONAL,
IN PVOID SystemContext,
IN LONG NumberProcessors,
IN volatile PLONG Number
);
VOID
HalpSetClockBeforeSleep(
VOID
);
VOID
HalpSetClockAfterSleep(
VOID
);
BOOLEAN
HalpWakeupTimeElapsed(
VOID
);
VOID
HalpReenableAcpi(
VOID
);
VOID
HalpSetInterruptControllerWakeupState(
ULONG Context
);
typedef struct _ERESOURCE {
LIST_ENTRY SystemResourcesList;
PVOID OwnerTable;
SHORT ActiveCount;
USHORT Flag;
PKSEMAPHORE SharedWaiters;
PKEVENT ExclusiveWaiters;
LIST_ENTRY OwnerThreads[2];
ULONG ContentionCount;
USHORT NumberOfSharedWaiters;
USHORT NumberOfExclusiveWaiters;
union {
PVOID Address;
ULONG CreatorBackTraceIndex;
};
KSPIN_LOCK SpinLock;
} ERESOURCE, *PERESOURCE;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGELK, HaliAcpiSleep)
#pragma alloc_text(PAGELK, HaliAcpiFakeSleep)
#pragma alloc_text(PAGELK, HalpAcpiPreSleep)
#pragma alloc_text(PAGELK, HalpAcpiPostSleep)
#pragma alloc_text(PAGELK, HalpWakeupTimeElapsed)
#pragma alloc_text(PAGELK, HalpReenableAcpi)
#pragma alloc_text(PAGELK, HaliSetWakeEnable)
#pragma alloc_text(PAGELK, HaliSetWakeAlarm)
#endif
HAL_WAKEUP_STATE HalpWakeupState;
ULONG Barrier;
volatile ULONG HalpSleepSync;
PKPROCESSOR_STATE HalpHiberProcState;
#if DBG
BOOLEAN HalpFailSleep = FALSE;
#endif
#define PM1_TMR_EN 0x0001
#define PM1_RTC_EN 0x0400
#define WAK_STS 0x8000
#define HAL_PRIMARY_PROCESSOR 0
//
// For re-enabling the debugger's com port.
//
extern PUCHAR KdComPortInUse;
VOID
HalpAcpiFlushCache(
)
{
HalSweepDcache();
HalSweepIcache();
}
VOID
HalpSaveProcessorStateAndWait(
IN PKPROCESSOR_STATE ProcessorState,
IN volatile PULONG Count
)
/*++
Rountine description:
This function saves the volatile, non-volatile and special register
state of the current processor.
N.B. floating point state is NOT captured.
Arguments:
ProcessorState - Address of processor state record to fill in.
pBarrier - Address of a value to use as a lock.
Return Value:
None. This function does not return.
--*/
{
#if 0
//
// Fill in ProcessorState
//
KeSaveStateForHibernate(ProcessorState);
//
// Save return address, not caller's return address.
//
ProcessorState->ContextFrame.StIIP = HalpGetReturnAddress();
#endif
//
// Flush the cache, as the processor may be about to power off.
//
//
HalpAcpiFlushCache();
//
// Singal that this processor has saved its state.
//
HalpLockedIncrementUlong(Count);
//
// Wait for the hibernation file to be written.
// Processor 0 will zero Barrier when it is
// finished.
//
// N.B. We can't return from this function
// before the hibernation file is finished
// because we would be tearing down the very same
// stack that we will be jumping onto when the
// processor resumes. But after the hibernation
// file is written, it doesn't matter, because
// the stack will be restored from disk.
//
while (*Count != 0);
}
BOOLEAN
HalpAcpiPreSleep(
SLEEP_STATE_CONTEXT Context
)
/*++
Routine Description:
Arguments:
none
Return Value:
status
--*/
{
USHORT pmTimer;
GEN_ADDR pm1a;
GEN_ADDR pm1b;
pm1a = HalpFixedAcpiDescTable.x_pm1a_evt_blk;
pm1a.Address.QuadPart += (HalpFixedAcpiDescTable.x_pm1a_evt_blk.BitWidth / 2 / 8); // 2 because we want to cut it in half, 8 because we want to convert bits to bytes
pm1a.BitWidth = HalpFixedAcpiDescTable.x_pm1a_evt_blk.BitWidth / 2;
pm1b = HalpFixedAcpiDescTable.x_pm1b_evt_blk;
pm1b.Address.QuadPart += (HalpFixedAcpiDescTable.x_pm1b_evt_blk.BitWidth / 2 / 8);
pm1b.BitWidth = HalpFixedAcpiDescTable.x_pm1b_evt_blk.BitWidth / 2;
HalpSleepContext.AsULONG = Context.AsULONG;
#if DBG
if (HalpFailSleep) {
return FALSE;
}
#endif
//
// If we should have woken up already, don't sleep.
//
if (HalpWakeupTimeElapsed()) {
return FALSE;
}
//
// If an RTC alarm is set, then enable it and disable
// periodic interrupts (for profiling.)
//
HalpSetClockBeforeSleep();
//
// Check to see if we need to disable all wakeup events.
//
if (!HalpWakeupState.GeneralWakeupEnable) {
AcpiEnableDisableGPEvents(FALSE);
} else {
//
// Only call this before going to sleep --- waking up should
// reset the GPEs to the 'proper' value
//
AcpiGpeEnableWakeEvents();
}
if (Context.bits.Flags & SLEEP_STATE_SAVE_MOTHERBOARD) {
HalpSaveDmaControllerState();
HalpSaveTimerState();
}
//
// We need to make sure that the PM timer is disabled from
// this point onward. We also need to make that the
// RTC Enable is only enabled if the RTC shold wake up the compiler
//
pmTimer = (USHORT)HalpReadGenAddr(&pm1a);
if (HalpFixedAcpiDescTable.x_pm1b_evt_blk.Address.QuadPart) {
pmTimer |= (USHORT)HalpReadGenAddr(&pm1b);
}
//
// Clear the timer enable bit.
//
pmTimer &= ~PM1_TMR_EN;
//
// Check to see if we the machine supports RTC wake in Fixed Feature
// space. Some machines implement RTC support via control methods.
//
if (!(HalpFixedAcpiDescTable.flags & RTC_WAKE_GENERIC) ) {
//
// Check to see f we need to disable/enable the RTC alarm
//
if (!HalpWakeupState.RtcWakeupEnable) {
pmTimer &= ~PM1_RTC_EN;
} else {
pmTimer |= PM1_RTC_EN;
}
}
//
// Write it back into the hardware.
//
HalpWriteGenAddr(&pm1a, pmTimer);
if (HalpFixedAcpiDescTable.x_pm1b_evt_blk.Address.QuadPart) {
HalpWriteGenAddr(&pm1b, pmTimer);
}
return TRUE;
}
BOOLEAN
HalpAcpiPostSleep(
ULONG Context
)
{
USHORT pmTimer;
GEN_ADDR pm1a;
GEN_ADDR pm1b;
pm1a = HalpFixedAcpiDescTable.x_pm1a_evt_blk;
pm1a.Address.QuadPart += (HalpFixedAcpiDescTable.pm1_evt_len / 2);
pm1b = HalpFixedAcpiDescTable.x_pm1b_evt_blk;
pm1b.Address.QuadPart += (HalpFixedAcpiDescTable.pm1_evt_len / 2);
//
// Read te currently set PM1 Enable bits.
//
pmTimer = (USHORT)HalpReadGenAddr(&pm1a);
if (HalpFixedAcpiDescTable.x_pm1b_evt_blk.Address.QuadPart) {
pmTimer |= (USHORT)HalpReadGenAddr(&pm1b);
}
//
// Set the timer enable bit. Clear the RTC enable bit.
//
pmTimer &= ~PM1_RTC_EN;
//
// Write it back the new PM1 Enable bits
//
HalpWriteGenAddr(&pm1a, pmTimer);
if (HalpFixedAcpiDescTable.x_pm1b_evt_blk.Address.QuadPart) {
HalpWriteGenAddr(&pm1b, pmTimer);
}
//
// Unset the RTC alarm and re-enable periodic interrupts.
//
HalpSetClockAfterSleep();
HalpWakeupState.RtcWakeupEnable = FALSE;
*((PULONG)HalpWakeVector) = 0;
HalpSetInterruptControllerWakeupState(Context);
if (HalpSleepContext.bits.Flags & SLEEP_STATE_SAVE_MOTHERBOARD) {
//
// If Kd was in use, then invalidate it. It will re-sync itself.
//
if (KdComPortInUse) {
KdRestore(TRUE);
}
HalpRestoreDmaControllerState();
HalpRestoreTimerState();
}
//
// Enable all GPEs, not just the wake ones
//
AcpiEnableDisableGPEvents(TRUE);
return TRUE;
}
BOOLEAN
HalpWakeupTimeElapsed(
VOID
)
{
LARGE_INTEGER wakeupTime, currentTime;
TIME_FIELDS currentTimeFields;
//
// Check to see if a wakeup timer has already expired.
//
if (HalpWakeupState.RtcWakeupEnable) {
HalQueryRealTimeClock(&currentTimeFields);
RtlTimeFieldsToTime(&currentTimeFields,
&currentTime);
RtlTimeFieldsToTime(&HalpWakeupState.RtcWakeupTime,
&wakeupTime);
if (wakeupTime.QuadPart < currentTime.QuadPart) {
return TRUE;
}
}
return FALSE;
}
NTSTATUS
HaliSetWakeAlarm (
IN ULONGLONG WakeSystemTime,
IN PTIME_FIELDS WakeTimeFields OPTIONAL
)
/*++
Routine Description:
This routine sets the real-time clock's alarm to go
off at a specified time in the future and programs
the ACPI chipset so that this wakes the computer.
Arguments:
WakeSystemTime - amount of time that passes before we wake
WakeTimeFields - time to wake broken down into TIME_FIELDS
Return Value:
status
--*/
{
if (WakeSystemTime == 0) {
HalpWakeupState.RtcWakeupEnable = FALSE;
return STATUS_SUCCESS;
}
ASSERT( WakeTimeFields );
HalpWakeupState.RtcWakeupEnable = TRUE;
HalpWakeupState.RtcWakeupTime = *WakeTimeFields;
return HalpSetWakeAlarm(WakeSystemTime,
WakeTimeFields);
}
VOID
HaliSetWakeEnable(
IN BOOLEAN Enable
)
/*++
Routine Description:
This routine is called to set the policy for waking up.
As we go to sleep, the global HalpWakeupState will be
read and the hardware set accordingly.
Arguments:
Enable - true or false
Return Value:
--*/
{
if (Enable) {
HalpWakeupState.GeneralWakeupEnable = TRUE;
} else {
HalpWakeupState.GeneralWakeupEnable = FALSE;
HalpWakeupState.RtcWakeupEnable = FALSE;
}
}
VOID
HalpReenableAcpi(
VOID
)
/*++
Routine Description:
This calls into the ACPI driver to switch back into ACPI mode,
presumably after S4 and sets the ACPI registers that the HAL
controls.
Arguments:
Return Value:
--*/
{
// TEMPTEMP?
HalpInitializeClock();
AcpiInitEnableAcpi(TRUE);
AcpiEnableDisableGPEvents(TRUE);
}
/*++
Routine Description:
This is a stub to allow us to perform device powerdown
testing on IA64 machines before they actually support
real sleep states.
Arguments:
<standard sleep handler args>
Return Value:
STATUS_NOT_SUPPORTED
--*/
NTSTATUS
HaliAcpiFakeSleep(
IN PVOID Context,
IN PENTER_STATE_SYSTEM_HANDLER SystemHandler OPTIONAL,
IN PVOID SystemContext,
IN LONG NumberProcessors,
IN volatile PLONG Number
)
{
return STATUS_NOT_SUPPORTED;
}
NTSTATUS
HaliAcpiSleep(
IN PVOID Context,
IN PENTER_STATE_SYSTEM_HANDLER SystemHandler OPTIONAL,
IN PVOID SystemContext,
IN LONG NumberProcessors,
IN volatile PLONG Number
)
/*++
Routine Description:
At some point in time this function will be called to put PCs into a sleep
state. It saves motherboard state and then bails out. For now this function
is only called to implement S5 on Itanium.
Arguments:
--*/
{
NTSTATUS Status = STATUS_SUCCESS;
KIRQL OldIrql;
SLEEP_STATE_CONTEXT SleepContext;
USHORT SlpTypA, SlpTypB, Pm1Control;
PKPROCESSOR_STATE CurrentProcessorState;
GEN_ADDR Pm1bEvt;
PKPRCB Prcb;
//
// initial setup.
//
HalpDisableInterrupts();
KeRaiseIrql(HIGH_LEVEL, &OldIrql);
SleepContext.AsULONG = (ULONG) (((ULONGLONG) Context) & 0xffffffff);
SlpTypA = (USHORT)HalpReadGenAddr(&HalpFixedAcpiDescTable.x_pm1a_ctrl_blk);
if (HalpFixedAcpiDescTable.x_pm1b_ctrl_blk.Address.QuadPart) {
SlpTypB = (USHORT)HalpReadGenAddr(&HalpFixedAcpiDescTable.x_pm1b_ctrl_blk);
}
//
// If it is not processor 0, then goto wait loop.
//
Prcb = PCR->Prcb;
if (Prcb->Number != 0) {
//
// Get processor number, get size of proc state and generate an index
// into HalpHiberProcState.
//
CurrentProcessorState = HalpHiberProcState + Prcb->Number;
HalpSaveProcessorStateAndWait(CurrentProcessorState,
(PULONG) &HalpSleepSync);
//
// Wait for next phase
//
while (HalpSleepSync != 0); // wait for barrier to move
} else { // processor 0
Barrier = 0;
//
// Make sure the other processors have saved their
// state and begun to spin.
//
HalpLockedIncrementUlong((PULONG) &HalpSleepSync);
while (NumberProcessors != (LONG) HalpSleepSync);
//
// Take care of chores (RTC, interrupt controller, etc.)
//
//
// The hal has all of it's state saved into ram and is ready
// for the power down. If there's a system state handler give
// it a shot
//
if (SystemHandler) {
Status = (*SystemHandler)(SystemContext);
if (!NT_SUCCESS(Status)) {
HalpReenableAcpi();
//
// Restore the SLP_TYP registers. (So that embedded controllers
// and BIOSes can be sure that we think the machine is awake.)
//
HalpWriteGenAddr (&HalpFixedAcpiDescTable.x_pm1a_ctrl_blk, SlpTypA);
if (HalpFixedAcpiDescTable.x_pm1b_ctrl_blk.Address.QuadPart) {
HalpWriteGenAddr(&HalpFixedAcpiDescTable.x_pm1b_ctrl_blk, SlpTypB);
}
HalpAcpiPostSleep(SleepContext.AsULONG);
}
} else {
if (HalpAcpiPreSleep(SleepContext)) {
//
// If we will not be losing processor state, go to sleep.
//
if ((SleepContext.bits.Flags & SLEEP_STATE_FIRMWARE_RESTART) == 0) {
//
// Reset WAK_STS
//
HalpWriteGenAddr(&HalpFixedAcpiDescTable.x_pm1a_evt_blk, (USHORT) WAK_STS);
if (HalpFixedAcpiDescTable.x_pm1b_evt_blk.Address.QuadPart) {
HalpWriteGenAddr(&HalpFixedAcpiDescTable.x_pm1b_evt_blk, (USHORT) WAK_STS);
}
//
// Flush the caches if necessary
//
if (SleepContext.bits.Flags & SLEEP_STATE_FLUSH_CACHE) {
HalpAcpiFlushCache();
}
//
// Issue SLP commands to PM1a_CNT and PM1b_CNT
//
//
// nibble 0 is 1a sleep type, put it in position and enable sleep.
// preserve some bits in Pm1aCnt.
//
Pm1Control = (USHORT)HalpReadGenAddr(&HalpFixedAcpiDescTable.x_pm1a_ctrl_blk);
Pm1Control = (USHORT) ((Pm1Control & CTL_PRESERVE) |
(SleepContext.bits.Pm1aVal << SLP_TYP_SHIFT) | SLP_EN);
HalpWriteGenAddr (&HalpFixedAcpiDescTable.x_pm1a_ctrl_blk, Pm1Control);
//
// nibble 1 is 1b sleep type, put it in position and enable sleep
// preserve some bits in Pm1bCnt.
//
if (HalpFixedAcpiDescTable.x_pm1b_ctrl_blk.Address.QuadPart) {
Pm1Control = (USHORT)HalpReadGenAddr(&HalpFixedAcpiDescTable.x_pm1b_ctrl_blk);
Pm1Control = (USHORT) ((Pm1Control & CTL_PRESERVE) |
(SleepContext.bits.Pm1bVal << SLP_TYP_SHIFT) | SLP_EN);
HalpWriteGenAddr(&HalpFixedAcpiDescTable.x_pm1b_ctrl_blk, Pm1Control);
}
//
// Wait for sleep to be over
//
if (HalpFixedAcpiDescTable.x_pm1b_evt_blk.Address.QuadPart) {
Pm1bEvt = HalpFixedAcpiDescTable.x_pm1b_evt_blk;
} else {
Pm1bEvt = HalpFixedAcpiDescTable.x_pm1a_evt_blk;
}
while ( ((HalpReadGenAddr(&HalpFixedAcpiDescTable.x_pm1a_evt_blk) & WAK_STS) == 0) &&
((HalpReadGenAddr(&Pm1bEvt) & WAK_STS) == 0) );
} else {
CurrentProcessorState = HalpHiberProcState + Prcb->Number;
// HalpSetupStateForResume(CurrentProcessorState);
}
} // HalpAcpiPreSleep() == 0
} // SystemHandler == 0
//
// Notify other processor of completion
//
HalpSleepSync = 0;
} // processor 0
//
// Restore each processor's APIC state.
//
// HalpPostSleepMP<NumberProc, Barrier>;
//
// Restore caller's IRQL.
//
KeLowerIrql(OldIrql);
//
// Exit.
//
// HalpSleepSync = 0;
return(Status);
}
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