/****************************************************************************** * * Name: hwxface.c - Hardware access external interfaces * $Revision: 37 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999, 2000, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * *****************************************************************************/ #include "acpi.h" #include "acnamesp.h" #include "achware.h" #define _COMPONENT HARDWARE MODULE_NAME ("hwxface") /****************************************************************************** * * Hardware globals * ******************************************************************************/ ACPI_C_STATE_HANDLER AcpiHwCxHandlers[MAX_CX_STATES] = {NULL, AcpiHwEnterC1, NULL, NULL}; UINT32 AcpiHwActiveCxState = 1; /**************************************************************************** * * FUNCTION: AcpiGetProcessorId * * PARAMETERS: ProcessorHandle - handle for the cpu to get info about * Id - location to return the processor ID * * RETURN: Status of function * * DESCRIPTION: Get the ACPI processor ID * ****************************************************************************/ ACPI_STATUS AcpiGetProcessorId ( ACPI_HANDLE ProcessorHandle, UINT32 *Id) { ACPI_NAMESPACE_NODE *CpuNode; ACPI_OPERAND_OBJECT *CpuObj; FUNCTION_TRACE ("AcpiGetProcessorId"); /* * Have to at least have somewhere to return the ID */ if (!Id) { return_ACPI_STATUS(AE_BAD_PARAMETER); } /* * Convert and validate the device handle */ CpuNode = AcpiNsConvertHandleToEntry (ProcessorHandle); if (!CpuNode) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* * Check for an existing internal object */ CpuObj = AcpiNsGetAttachedObject ((ACPI_HANDLE) CpuNode); if (!CpuObj) { return_ACPI_STATUS (AE_NOT_FOUND); } /* * Return the ID */ *Id = CpuObj->Processor.ProcId; return_ACPI_STATUS (AE_OK); } /**************************************************************************** * * FUNCTION: AcpiGetProcessorThrottlingInfo * * PARAMETERS: ProcessorHandle - handle for the cpu to get info about * UserBuffer - caller supplied buffer * * RETURN: Status of function * * DESCRIPTION: Get throttling capabilities for the processor, this routine * builds the data directly into the callers buffer * ****************************************************************************/ ACPI_STATUS AcpiGetProcessorThrottlingInfo ( ACPI_HANDLE ProcessorHandle, ACPI_BUFFER *UserBuffer) { NATIVE_UINT PercentStep; NATIVE_UINT NextPercent; NATIVE_UINT NumThrottleStates; NATIVE_UINT BufferSpaceNeeded; NATIVE_UINT i; UINT8 DutyWidth; ACPI_NAMESPACE_NODE *CpuNode; ACPI_OPERAND_OBJECT *CpuObj; ACPI_CPU_THROTTLING_STATE *StatePtr; FUNCTION_TRACE ("AcpiGetProcessorThrottlingInfo"); /* * Have to at least have a buffer to return info in */ if (!UserBuffer) { return_ACPI_STATUS(AE_BAD_PARAMETER); } /* * Convert and validate the device handle */ CpuNode = AcpiNsConvertHandleToEntry (ProcessorHandle); if (!CpuNode) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* * Check for an existing internal object */ CpuObj = AcpiNsGetAttachedObject ((ACPI_HANDLE) CpuNode); if (!CpuObj) { return_ACPI_STATUS (AE_NOT_FOUND); } /* * (Duty Width on IA-64 is zero) */ DutyWidth = AcpiGbl_FADT->DutyWidth; /* * P0 must always have a P_BLK all others may be null * in either case, we can't throttle a processor that has no P_BLK * * Also if no Duty width, one state and it is 100% * */ if (!CpuObj->Processor.Length || !DutyWidth || (ACPI_UINT16_MAX < CpuObj->Processor.Address)) { /* * AcpiEven though we can't throttle, we still have one state (100%) */ NumThrottleStates = 1; } else { NumThrottleStates = (int) AcpiHwLocalPow (2,DutyWidth); } BufferSpaceNeeded = NumThrottleStates * sizeof (ACPI_CPU_THROTTLING_STATE); if ((UserBuffer->Length < BufferSpaceNeeded) || !UserBuffer->Pointer) { UserBuffer->Length = BufferSpaceNeeded; return_ACPI_STATUS (AE_BUFFER_OVERFLOW); } UserBuffer->Length = BufferSpaceNeeded; StatePtr = (ACPI_CPU_THROTTLING_STATE *) UserBuffer->Pointer; PercentStep = 1000 / NumThrottleStates; /* * Build each entry in the buffer. Note that we're using the value * 1000 and dividing each state by 10 to better avoid round-off * accumulation. Also note that the throttling STATES are ordered * sequentially from 100% (state 0) on down (e.g. 87.5% = state 1), * which is exactly opposite from duty cycle values (12.5% = state 1). */ for (i = 0, NextPercent = 1000; i < NumThrottleStates; i++) { StatePtr[i].StateNumber = i; StatePtr[i].PercentOfClock = NextPercent / 10; NextPercent -= PercentStep; } return_ACPI_STATUS(AE_OK); } /**************************************************************************** * * FUNCTION: AcpiGetProcessorThrottlingState * * PARAMETERS: ProcessorHandle - handle for the cpu to throttle * ThrottleState - throttling state to enter * * RETURN: Status of function * * DESCRIPTION: Get current hardware throttling state * ****************************************************************************/ ACPI_STATUS AcpiGetProcessorThrottlingState ( ACPI_HANDLE ProcessorHandle, UINT32 *ThrottleState) { ACPI_NAMESPACE_NODE *CpuNode; ACPI_OPERAND_OBJECT *CpuObj; UINT32 NumThrottleStates; UINT32 DutyCycle; UINT8 DutyOffset; UINT8 DutyWidth; FUNCTION_TRACE ("AcpiGetProcessorThrottlingState"); /* Convert and validate the device handle */ CpuNode = AcpiNsConvertHandleToEntry (ProcessorHandle); if (!CpuNode || !ThrottleState) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Check for an existing internal object */ CpuObj = AcpiNsGetAttachedObject ((ACPI_HANDLE) CpuNode); if (!CpuObj) { return_ACPI_STATUS (AE_NOT_FOUND); } /* * No Duty fields in IA64 tables */ DutyOffset = AcpiGbl_FADT->DutyOffset; DutyWidth = AcpiGbl_FADT->DutyWidth; /* * Must have a valid P_BLK P0 must have a P_BLK all others may be null * in either case, we can't thottle a processor that has no P_BLK * that means we are in the only supported state (0 - 100%) * * also, if DutyWidth is zero there are no additional states */ if (!CpuObj->Processor.Length || !DutyWidth || (ACPI_UINT16_MAX < CpuObj->Processor.Address)) { *ThrottleState = 0; return_ACPI_STATUS(AE_OK); } NumThrottleStates = (UINT32) AcpiHwLocalPow (2,DutyWidth); /* * Get the current duty cycle value. */ DutyCycle = AcpiHwGetDutyCycle (DutyOffset, CpuObj->Processor.Address, NumThrottleStates); /* * Convert duty cycle to throttling state (invert). */ if (DutyCycle == 0) { *ThrottleState = 0; } else { *ThrottleState = NumThrottleStates - DutyCycle; } return_ACPI_STATUS(AE_OK); } /**************************************************************************** * * FUNCTION: AcpiSetProcessorThrottlingState * * PARAMETERS: ProcessorHandle - handle for the cpu to throttle * ThrottleState - throttling state to enter * * RETURN: Status of function * * DESCRIPTION: Set hardware into requested throttling state, the handle * passed in must have a valid P_BLK * ****************************************************************************/ ACPI_STATUS AcpiSetProcessorThrottlingState ( ACPI_HANDLE ProcessorHandle, UINT32 ThrottleState) { ACPI_NAMESPACE_NODE *CpuNode; ACPI_OPERAND_OBJECT *CpuObj; UINT32 NumThrottleStates = 0; UINT8 DutyOffset; UINT8 DutyWidth; UINT32 DutyCycle = 0; FUNCTION_TRACE ("AcpiSetProcessorThrottlingState"); /* Convert and validate the device handle */ CpuNode = AcpiNsConvertHandleToEntry (ProcessorHandle); if (!CpuNode) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Check for an existing internal object */ CpuObj = AcpiNsGetAttachedObject ((ACPI_HANDLE) CpuNode); if (!CpuObj) { return_ACPI_STATUS (AE_NOT_FOUND); } /* * No Duty fields in IA64 tables */ DutyOffset = AcpiGbl_FADT->DutyOffset; DutyWidth = AcpiGbl_FADT->DutyWidth; /* * Must have a valid P_BLK P0 must have a P_BLK all others may be null * in either case, we can't thottle a processor that has no P_BLK * that means we are in the only supported state (0 - 100%) * * also, if DutyWidth is zero there are no additional states */ if (!CpuObj->Processor.Length || !DutyWidth || (ACPI_UINT16_MAX < CpuObj->Processor.Address)) { /* * If caller wants to set the state to the only state we handle * we're done. */ if (ThrottleState == 0) { return_ACPI_STATUS (AE_OK); } /* * Can't set this state */ return_ACPI_STATUS (AE_SUPPORT); } NumThrottleStates = (UINT32) AcpiHwLocalPow (2,DutyWidth); /* * Convert throttling state to duty cycle (invert). */ if (ThrottleState > 0) { DutyCycle = NumThrottleStates - ThrottleState; } /* * Turn off throttling (don't muck with the h/w while throttling). */ AcpiHwDisableThrottling (CpuObj->Processor.Address); /* * Program the throttling state. */ AcpiHwProgramDutyCycle (DutyOffset, DutyCycle, CpuObj->Processor.Address, NumThrottleStates); /* * Only enable throttling for non-zero states (0 - 100%) */ if (ThrottleState) { AcpiHwEnableThrottling (CpuObj->Processor.Address); } return_ACPI_STATUS(AE_OK); } /**************************************************************************** * * FUNCTION: AcpiGetProcessorCxInfo * * PARAMETERS: ProcessorHandle - handle for the cpu return info about * UserBuffer - caller supplied buffer * * RETURN: Status of function * * DESCRIPTION: Get Cx state latencies, this routine * builds the data directly into the callers buffer * * ****************************************************************************/ ACPI_STATUS AcpiGetProcessorCxInfo ( ACPI_HANDLE ProcessorHandle, ACPI_BUFFER *UserBuffer) { ACPI_STATUS Status = AE_OK; UINT32 CxStateLatencies[4] = {0, 0, 0, 0}; NATIVE_UINT BufferSpaceNeeded = 0; ACPI_CX_STATE *StatePtr = NULL; NATIVE_UINT i = 0; FUNCTION_TRACE ("AcpiGetProcessorCxInfo"); /* * Have to at least have a buffer to return info in */ if (!UserBuffer) { return_ACPI_STATUS (AE_BAD_PARAMETER); } Status = AcpiHwGetCxInfo (CxStateLatencies); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } BufferSpaceNeeded = 4 * sizeof (ACPI_CX_STATE); if ((UserBuffer->Length < BufferSpaceNeeded) || !UserBuffer->Pointer) { UserBuffer->Length = BufferSpaceNeeded; return_ACPI_STATUS (AE_BUFFER_OVERFLOW); } UserBuffer->Length = BufferSpaceNeeded; StatePtr = (ACPI_CX_STATE *) UserBuffer->Pointer; for (i = 0; i < 4; i++) { StatePtr[i].StateNumber = i; StatePtr[i].Latency = CxStateLatencies[i]; } return_ACPI_STATUS (AE_OK); } /**************************************************************************** * * FUNCTION: AcpiSetProcessorSleepState * * PARAMETERS: ProcessorHandle - handle for the cpu return info about * CxState - the Cx sleeping state (C1-C3) to make * 'active' * * RETURN: Status of function * * DESCRIPTION: Sets which Cx state will be used during calls to * AcpiProcessorSleep () * ****************************************************************************/ ACPI_STATUS AcpiSetProcessorSleepState ( ACPI_HANDLE ProcessorHandle, UINT32 CxState) { ACPI_STATUS Status; FUNCTION_TRACE ("AcpiSetProcessorSleepState"); Status = AcpiHwSetCx (CxState); return_ACPI_STATUS (Status); } /**************************************************************************** * * FUNCTION: AcpiProcessorSleep * * PARAMETERS: ProcessorHandle - handle for the cpu to put to sleep (Cx) * TimeSleeping - time (in microseconds) elapsed while * sleeping * * RETURN: Status of function * * DESCRIPTION: Puts the processor into the currently active sleep state (Cx) * ****************************************************************************/ ACPI_STATUS AcpiProcessorSleep ( ACPI_HANDLE ProcessorHandle, UINT32 *PmTimerTicks) { ACPI_NAMESPACE_NODE *CpuNode = NULL; ACPI_OPERAND_OBJECT *CpuObj = NULL; ACPI_IO_ADDRESS Address = 0; /* * Convert ProcessorHandle to PblkAddres... */ /* Convert and validate the device handle */ CpuNode = AcpiNsConvertHandleToEntry (ProcessorHandle); if (!CpuNode) { return (AE_BAD_PARAMETER); } /* Check for an existing internal object */ CpuObj = AcpiNsGetAttachedObject ((ACPI_HANDLE) CpuNode); if (!CpuObj) { return (AE_NOT_FOUND); } /* Get the processor register block (P_BLK) address */ Address = CpuObj->Processor.Address; if (!CpuObj->Processor.Length) { /* Ensure a NULL addresss (note that P_BLK isn't required for C1) */ Address = 0; } /* * Enter the currently active Cx sleep state. */ return (AcpiHwEnterCx (Address, PmTimerTicks)); } /****************************************************************************** * * FUNCTION: AcpiGetTimer * * PARAMETERS: none * * RETURN: Current value of the ACPI PMT (timer) * * DESCRIPTION: Obtains current value of ACPI PMT * ******************************************************************************/ ACPI_STATUS AcpiGetTimer ( UINT32 *OutTicks) { FUNCTION_TRACE ("AcpiGetTimer"); if (!OutTicks) { return_ACPI_STATUS (AE_BAD_PARAMETER); } *OutTicks = AcpiHwPmtTicks (); return_ACPI_STATUS (AE_OK); } /****************************************************************************** * * FUNCTION: AcpiSetFirmwareWakingVector * * PARAMETERS: PhysicalAddress - Physical address of ACPI real mode * entry point. * * RETURN: AE_OK or AE_ERROR * * DESCRIPTION: Access function for dFirmwareWakingVector field in FACS * ******************************************************************************/ ACPI_STATUS AcpiSetFirmwareWakingVector ( ACPI_PHYSICAL_ADDRESS PhysicalAddress) { FUNCTION_TRACE ("AcpiSetFirmwareWakingVector"); /* Make sure that we have an FACS */ if (!AcpiGbl_FACS) { return_ACPI_STATUS (AE_NO_ACPI_TABLES); } /* Set the vector */ if (AcpiGbl_FACS->VectorWidth == 32) { * (UINT32 *) AcpiGbl_FACS->FirmwareWakingVector = (UINT32) PhysicalAddress; } else { *AcpiGbl_FACS->FirmwareWakingVector = PhysicalAddress; } return_ACPI_STATUS (AE_OK); } /****************************************************************************** * * FUNCTION: AcpiGetFirmwareWakingVector * * PARAMETERS: *PhysicalAddress - Output buffer where contents of * the FirmwareWakingVector field of * the FACS will be stored. * * RETURN: Status * * DESCRIPTION: Access function for dFirmwareWakingVector field in FACS * ******************************************************************************/ ACPI_STATUS AcpiGetFirmwareWakingVector ( ACPI_PHYSICAL_ADDRESS *PhysicalAddress) { FUNCTION_TRACE ("AcpiGetFirmwareWakingVector"); if (!PhysicalAddress) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Make sure that we have an FACS */ if (!AcpiGbl_FACS) { return_ACPI_STATUS (AE_NO_ACPI_TABLES); } /* Get the vector */ if (AcpiGbl_FACS->VectorWidth == 32) { *PhysicalAddress = * (UINT32 *) AcpiGbl_FACS->FirmwareWakingVector; } else { *PhysicalAddress = *AcpiGbl_FACS->FirmwareWakingVector; } return_ACPI_STATUS (AE_OK); } /**************************************************************************** * * FUNCTION: AcpiSetSystemSleepState * * PARAMETERS: SleepState - the Sx sleeping state (S1-S5) * * RETURN: Status of function * * DESCRIPTION: Puts the system into the specified sleeping state. * Note that currently supports only S1 and S5. * ****************************************************************************/ ACPI_STATUS AcpiSetSystemSleepState ( UINT8 SleepState) { UINT8 Slp_TypA, Slp_TypB; UINT16 Count; ACPI_STATUS Status; ACPI_OBJECT_LIST Arg_list; ACPI_OBJECT Arg; ACPI_OBJECT Objects[3]; /* package plus 2 number objects */ ACPI_BUFFER ReturnBuffer; FUNCTION_TRACE ("AcpiSetSystemSxState"); Slp_TypA = Slp_TypB = 0; if (SleepState > ACPI_STATE_S5) { return_ACPI_STATUS (AE_BAD_PARAMETER); } Status = AcpiHwObtainSleepTypeRegisterData (SleepState, &Slp_TypA, &Slp_TypB); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* * The value for ACPI_STATE_S5 is not 5 actually, so adjust it. */ if (SleepState > ACPI_STATE_S4) { SleepState--; } /* * Evaluate the _PTS method */ MEMSET(&Arg_list, 0, sizeof(Arg_list)); Arg_list.Count = 1; Arg_list.Pointer = &Arg; MEMSET(&Arg, 0, sizeof(Arg)); Arg.Type = ACPI_TYPE_NUMBER; Arg.Number.Value = SleepState; AcpiEvaluateObject (NULL, "\\_PTS", &Arg_list, NULL); /* * Clear wake status */ AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_DO_NOT_LOCK, WAK_STS, 1); /* * Set ACPI_SLP_TYPA/b and ACPI_SLP_EN */ AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_DO_NOT_LOCK, SLP_TYPE_A, Slp_TypA); AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_DO_NOT_LOCK, SLP_TYPE_B, Slp_TypB); AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_DO_NOT_LOCK, SLP_EN, 1); /* * For S0 we don't wait for the WAK_STS bit. */ if (SleepState != ACPI_STATE_S0) { /* * Wait for WAK_STS bit */ Count = 0; while (!(AcpiHwRegisterBitAccess (ACPI_READ, ACPI_MTX_DO_NOT_LOCK, WAK_STS))) { #if 1 AcpiOsSleepUsec(1000); /* should we have OsdFunc for sleep or halt? */ #endif /* * Some BIOSes don't set WAK_STS at all, * give up waiting for wakeup if we time out. */ if (Count > 1000) { break; /* giving up */ } Count++; } } /* * Evaluate the _WAK method */ MEMSET(&Arg_list, 0, sizeof(Arg_list)); Arg_list.Count = 1; Arg_list.Pointer = &Arg; MEMSET(&Arg, 0, sizeof(Arg)); Arg.Type = ACPI_TYPE_NUMBER; Arg.Number.Value = SleepState; /* Set up _WAK result code buffer */ MEMSET(Objects, 0, sizeof(Objects)); ReturnBuffer.Length = sizeof(Objects); ReturnBuffer.Pointer = Objects; AcpiEvaluateObject (NULL, "\\_WAK", &Arg_list, &ReturnBuffer); Status = AE_OK; /* Check result code for _WAK */ if (Objects[0].Type != ACPI_TYPE_PACKAGE || Objects[1].Type != ACPI_TYPE_NUMBER || Objects[2].Type != ACPI_TYPE_NUMBER) { /* * In many BIOSes, _WAK doesn't return a result code. * We don't need to worry about it too much :-). */ DEBUG_PRINT (ACPI_INFO, ("AcpiSetSystemSleepState: _WAK result code is corrupted, " "but should be OK.\n")); } else { /* evaluate status code */ switch (Objects[1].Number.Value) { case 0x00000001: DEBUG_PRINT (ACPI_ERROR, ("AcpiSetSystemSleepState: Wake was signaled but failed " "due to lack of power.\n")); Status = AE_ERROR; break; case 0x00000002: DEBUG_PRINT (ACPI_ERROR, ("AcpiSetSystemSleepState: Wake was signaled but failed " "due to thermal condition.\n")); Status = AE_ERROR; break; } /* evaluate PSS code */ if (Objects[2].Number.Value == 0) { DEBUG_PRINT (ACPI_ERROR, ("AcpiSetSystemSleepState: The targeted S-state was not " "entered because of too much current being drawn from " "the power supply.\n")); Status = AE_ERROR; } } return_ACPI_STATUS (Status); }