/****************************************************************************** * * Module Name: evgpeblk - GPE block creation and initialization. * $Revision: 26 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2003, 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 "acevents.h" #include "acnamesp.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME ("evgpeblk") /******************************************************************************* * * FUNCTION: AcpiEvValidGpeEvent * * PARAMETERS: GpeEventInfo - Info for this GPE * * RETURN: TRUE if the GpeEvent is valid * * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. * Should be called only when the GPE lists are semaphore locked * and not subject to change. * ******************************************************************************/ BOOLEAN AcpiEvValidGpeEvent ( ACPI_GPE_EVENT_INFO *GpeEventInfo) { ACPI_GPE_XRUPT_INFO *GpeXruptBlock; ACPI_GPE_BLOCK_INFO *GpeBlock; ACPI_FUNCTION_ENTRY (); /* No need for spin lock since we are not changing any list elements */ /* Walk the GPE interrupt levels */ GpeXruptBlock = AcpiGbl_GpeXruptListHead; while (GpeXruptBlock) { GpeBlock = GpeXruptBlock->GpeBlockListHead; /* Walk the GPE blocks on this interrupt level */ while (GpeBlock) { if ((&GpeBlock->EventInfo[0] <= GpeEventInfo) && (&GpeBlock->EventInfo[((ACPI_SIZE) GpeBlock->RegisterCount) * 8] > GpeEventInfo)) { return (TRUE); } GpeBlock = GpeBlock->Next; } GpeXruptBlock = GpeXruptBlock->Next; } return (FALSE); } /******************************************************************************* * * FUNCTION: AcpiEvWalkGpeList * * PARAMETERS: GpeWalkCallback - Routine called for each GPE block * * RETURN: Status * * DESCRIPTION: Walk the GPE lists. * FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED * ******************************************************************************/ ACPI_STATUS AcpiEvWalkGpeList ( ACPI_GPE_CALLBACK GpeWalkCallback) { ACPI_GPE_BLOCK_INFO *GpeBlock; ACPI_GPE_XRUPT_INFO *GpeXruptInfo; ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE ("EvWalkGpeList"); AcpiOsAcquireLock (AcpiGbl_GpeLock, ACPI_ISR); /* Walk the interrupt level descriptor list */ GpeXruptInfo = AcpiGbl_GpeXruptListHead; while (GpeXruptInfo) { /* Walk all Gpe Blocks attached to this interrupt level */ GpeBlock = GpeXruptInfo->GpeBlockListHead; while (GpeBlock) { /* One callback per GPE block */ Status = GpeWalkCallback (GpeXruptInfo, GpeBlock); if (ACPI_FAILURE (Status)) { goto UnlockAndExit; } GpeBlock = GpeBlock->Next; } GpeXruptInfo = GpeXruptInfo->Next; } UnlockAndExit: AcpiOsReleaseLock (AcpiGbl_GpeLock, ACPI_ISR); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvSaveMethodInfo * * PARAMETERS: Callback from WalkNamespace * * RETURN: Status * * DESCRIPTION: Called from AcpiWalkNamespace. Expects each object to be a * control method under the _GPE portion of the namespace. * Extract the name and GPE type from the object, saving this * information for quick lookup during GPE dispatch * * The name of each GPE control method is of the form: * "_Lnn" or "_Enn" * Where: * L - means that the GPE is level triggered * E - means that the GPE is edge triggered * nn - is the GPE number [in HEX] * ******************************************************************************/ static ACPI_STATUS AcpiEvSaveMethodInfo ( ACPI_HANDLE ObjHandle, UINT32 Level, void *ObjDesc, void **ReturnValue) { ACPI_GPE_BLOCK_INFO *GpeBlock = (void *) ObjDesc; ACPI_GPE_EVENT_INFO *GpeEventInfo; UINT32 GpeNumber; char Name[ACPI_NAME_SIZE + 1]; UINT8 Type; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvSaveMethodInfo"); /* Extract the name from the object and convert to a string */ ACPI_MOVE_32_TO_32 (Name, &((ACPI_NAMESPACE_NODE *) ObjHandle)->Name.Integer); Name[ACPI_NAME_SIZE] = 0; /* * Edge/Level determination is based on the 2nd character * of the method name */ switch (Name[1]) { case 'L': Type = ACPI_EVENT_LEVEL_TRIGGERED; break; case 'E': Type = ACPI_EVENT_EDGE_TRIGGERED; break; default: /* Unknown method type, just ignore it! */ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown GPE method type: %s (name not of form _Lnn or _Enn)\n", Name)); return_ACPI_STATUS (AE_OK); } /* Convert the last two characters of the name to the GPE Number */ GpeNumber = ACPI_STRTOUL (&Name[2], NULL, 16); if (GpeNumber == ACPI_UINT32_MAX) { /* Conversion failed; invalid method, just ignore it */ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not extract GPE number from name: %s (name is not of form _Lnn or _Enn)\n", Name)); return_ACPI_STATUS (AE_OK); } /* Ensure that we have a valid GPE number for this GPE block */ if ((GpeNumber < GpeBlock->BlockBaseNumber) || (GpeNumber >= (GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8)))) { /* * Not valid for this GPE block, just ignore it * However, it may be valid for a different GPE block, since GPE0 and GPE1 * methods both appear under \_GPE. */ return_ACPI_STATUS (AE_OK); } /* * Now we can add this information to the GpeEventInfo block * for use during dispatch of this GPE. */ GpeEventInfo = &GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]; GpeEventInfo->Flags = Type; GpeEventInfo->MethodNode = (ACPI_NAMESPACE_NODE *) ObjHandle; /* Enable the GPE (SCIs should be disabled at this point) */ Status = AcpiHwEnableGpe (GpeEventInfo); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Registered GPE method %s as GPE number 0x%.2X\n", Name, GpeNumber)); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvGetGpeXruptBlock * * PARAMETERS: InterruptLevel - Interrupt for a GPE block * * RETURN: A GPE interrupt block * * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt * block per unique interrupt level used for GPEs. * Should be called only when the GPE lists are semaphore locked * and not subject to change. * ******************************************************************************/ static ACPI_GPE_XRUPT_INFO * AcpiEvGetGpeXruptBlock ( UINT32 InterruptLevel) { ACPI_GPE_XRUPT_INFO *NextGpeXrupt; ACPI_GPE_XRUPT_INFO *GpeXrupt; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvGetGpeXruptBlock"); /* No need for spin lock since we are not changing any list elements here */ NextGpeXrupt = AcpiGbl_GpeXruptListHead; while (NextGpeXrupt) { if (NextGpeXrupt->InterruptLevel == InterruptLevel) { return_PTR (NextGpeXrupt); } NextGpeXrupt = NextGpeXrupt->Next; } /* Not found, must allocate a new xrupt descriptor */ GpeXrupt = ACPI_MEM_CALLOCATE (sizeof (ACPI_GPE_XRUPT_INFO)); if (!GpeXrupt) { return_PTR (NULL); } GpeXrupt->InterruptLevel = InterruptLevel; /* Install new interrupt descriptor with spin lock */ AcpiOsAcquireLock (AcpiGbl_GpeLock, ACPI_NOT_ISR); if (AcpiGbl_GpeXruptListHead) { NextGpeXrupt = AcpiGbl_GpeXruptListHead; while (NextGpeXrupt->Next) { NextGpeXrupt = NextGpeXrupt->Next; } NextGpeXrupt->Next = GpeXrupt; GpeXrupt->Previous = NextGpeXrupt; } else { AcpiGbl_GpeXruptListHead = GpeXrupt; } AcpiOsReleaseLock (AcpiGbl_GpeLock, ACPI_NOT_ISR); /* Install new interrupt handler if not SCI_INT */ if (InterruptLevel != AcpiGbl_FADT->SciInt) { Status = AcpiOsInstallInterruptHandler (InterruptLevel, AcpiEvGpeXruptHandler, GpeXrupt); if (ACPI_FAILURE (Status)) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not install GPE interrupt handler at level 0x%X\n", InterruptLevel)); return_PTR (NULL); } } return_PTR (GpeXrupt); } /******************************************************************************* * * FUNCTION: AcpiEvDeleteGpeXrupt * * PARAMETERS: GpeXrupt - A GPE interrupt info block * * RETURN: Status * * DESCRIPTION: Remove and free a GpeXrupt block. Remove an associated * interrupt handler if not the SCI interrupt. * ******************************************************************************/ static ACPI_STATUS AcpiEvDeleteGpeXrupt ( ACPI_GPE_XRUPT_INFO *GpeXrupt) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvDeleteGpeXrupt"); /* We never want to remove the SCI interrupt handler */ if (GpeXrupt->InterruptLevel == AcpiGbl_FADT->SciInt) { GpeXrupt->GpeBlockListHead = NULL; return_ACPI_STATUS (AE_OK); } /* Disable this interrupt */ Status = AcpiOsRemoveInterruptHandler (GpeXrupt->InterruptLevel, AcpiEvGpeXruptHandler); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Unlink the interrupt block with lock */ AcpiOsAcquireLock (AcpiGbl_GpeLock, ACPI_NOT_ISR); if (GpeXrupt->Previous) { GpeXrupt->Previous->Next = GpeXrupt->Next; } if (GpeXrupt->Next) { GpeXrupt->Next->Previous = GpeXrupt->Previous; } AcpiOsReleaseLock (AcpiGbl_GpeLock, ACPI_NOT_ISR); /* Free the block */ ACPI_MEM_FREE (GpeXrupt); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvInstallGpeBlock * * PARAMETERS: GpeBlock - New GPE block * InterruptLevel - Level to be associated with this GPE block * * RETURN: Status * * DESCRIPTION: Install new GPE block with mutex support * ******************************************************************************/ static ACPI_STATUS AcpiEvInstallGpeBlock ( ACPI_GPE_BLOCK_INFO *GpeBlock, UINT32 InterruptLevel) { ACPI_GPE_BLOCK_INFO *NextGpeBlock; ACPI_GPE_XRUPT_INFO *GpeXruptBlock; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvInstallGpeBlock"); Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } GpeXruptBlock = AcpiEvGetGpeXruptBlock (InterruptLevel); if (!GpeXruptBlock) { Status = AE_NO_MEMORY; goto UnlockAndExit; } /* Install the new block at the end of the list for this interrupt with lock */ AcpiOsAcquireLock (AcpiGbl_GpeLock, ACPI_NOT_ISR); if (GpeXruptBlock->GpeBlockListHead) { NextGpeBlock = GpeXruptBlock->GpeBlockListHead; while (NextGpeBlock->Next) { NextGpeBlock = NextGpeBlock->Next; } NextGpeBlock->Next = GpeBlock; GpeBlock->Previous = NextGpeBlock; } else { GpeXruptBlock->GpeBlockListHead = GpeBlock; } GpeBlock->XruptBlock = GpeXruptBlock; AcpiOsReleaseLock (AcpiGbl_GpeLock, ACPI_NOT_ISR); UnlockAndExit: Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvDeleteGpeBlock * * PARAMETERS: GpeBlock - Existing GPE block * * RETURN: Status * * DESCRIPTION: Remove a GPE block * ******************************************************************************/ ACPI_STATUS AcpiEvDeleteGpeBlock ( ACPI_GPE_BLOCK_INFO *GpeBlock) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvInstallGpeBlock"); Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Disable all GPEs in this block */ Status = AcpiHwDisableGpeBlock (GpeBlock->XruptBlock, GpeBlock); if (!GpeBlock->Previous && !GpeBlock->Next) { /* This is the last GpeBlock on this interrupt */ Status = AcpiEvDeleteGpeXrupt (GpeBlock->XruptBlock); if (ACPI_FAILURE (Status)) { goto UnlockAndExit; } } else { /* Remove the block on this interrupt with lock */ AcpiOsAcquireLock (AcpiGbl_GpeLock, ACPI_NOT_ISR); if (GpeBlock->Previous) { GpeBlock->Previous->Next = GpeBlock->Next; } else { GpeBlock->XruptBlock->GpeBlockListHead = GpeBlock->Next; } if (GpeBlock->Next) { GpeBlock->Next->Previous = GpeBlock->Previous; } AcpiOsReleaseLock (AcpiGbl_GpeLock, ACPI_NOT_ISR); } /* Free the GpeBlock */ ACPI_MEM_FREE (GpeBlock->RegisterInfo); ACPI_MEM_FREE (GpeBlock->EventInfo); ACPI_MEM_FREE (GpeBlock); UnlockAndExit: Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvCreateGpeInfoBlocks * * PARAMETERS: GpeBlock - New GPE block * * RETURN: Status * * DESCRIPTION: Create the RegisterInfo and EventInfo blocks for this GPE block * ******************************************************************************/ static ACPI_STATUS AcpiEvCreateGpeInfoBlocks ( ACPI_GPE_BLOCK_INFO *GpeBlock) { ACPI_GPE_REGISTER_INFO *GpeRegisterInfo = NULL; ACPI_GPE_EVENT_INFO *GpeEventInfo = NULL; ACPI_GPE_EVENT_INFO *ThisEvent; ACPI_GPE_REGISTER_INFO *ThisRegister; ACPI_NATIVE_UINT i; ACPI_NATIVE_UINT j; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvCreateGpeInfoBlocks"); /* Allocate the GPE register information block */ GpeRegisterInfo = ACPI_MEM_CALLOCATE ( (ACPI_SIZE) GpeBlock->RegisterCount * sizeof (ACPI_GPE_REGISTER_INFO)); if (!GpeRegisterInfo) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not allocate the GpeRegisterInfo table\n")); return_ACPI_STATUS (AE_NO_MEMORY); } /* * Allocate the GPE EventInfo block. There are eight distinct GPEs * per register. Initialization to zeros is sufficient. */ GpeEventInfo = ACPI_MEM_CALLOCATE ( ((ACPI_SIZE) GpeBlock->RegisterCount * ACPI_GPE_REGISTER_WIDTH) * sizeof (ACPI_GPE_EVENT_INFO)); if (!GpeEventInfo) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not allocate the GpeEventInfo table\n")); Status = AE_NO_MEMORY; goto ErrorExit; } /* Save the new Info arrays in the GPE block */ GpeBlock->RegisterInfo = GpeRegisterInfo; GpeBlock->EventInfo = GpeEventInfo; /* * Initialize the GPE Register and Event structures. A goal of these * tables is to hide the fact that there are two separate GPE register sets * in a given gpe hardware block, the status registers occupy the first half, * and the enable registers occupy the second half. */ ThisRegister = GpeRegisterInfo; ThisEvent = GpeEventInfo; for (i = 0; i < GpeBlock->RegisterCount; i++) { /* Init the RegisterInfo for this GPE register (8 GPEs) */ ThisRegister->BaseGpeNumber = (UINT8) (GpeBlock->BlockBaseNumber + (i * ACPI_GPE_REGISTER_WIDTH)); ACPI_STORE_ADDRESS (ThisRegister->StatusAddress.Address, (ACPI_GET_ADDRESS (GpeBlock->BlockAddress.Address) + i)); ACPI_STORE_ADDRESS (ThisRegister->EnableAddress.Address, (ACPI_GET_ADDRESS (GpeBlock->BlockAddress.Address) + i + GpeBlock->RegisterCount)); ThisRegister->StatusAddress.AddressSpaceId = GpeBlock->BlockAddress.AddressSpaceId; ThisRegister->EnableAddress.AddressSpaceId = GpeBlock->BlockAddress.AddressSpaceId; ThisRegister->StatusAddress.RegisterBitWidth = ACPI_GPE_REGISTER_WIDTH; ThisRegister->EnableAddress.RegisterBitWidth = ACPI_GPE_REGISTER_WIDTH; ThisRegister->StatusAddress.RegisterBitOffset = ACPI_GPE_REGISTER_WIDTH; ThisRegister->EnableAddress.RegisterBitOffset = ACPI_GPE_REGISTER_WIDTH; /* Init the EventInfo for each GPE within this register */ for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { ThisEvent->BitMask = AcpiGbl_DecodeTo8bit[j]; ThisEvent->RegisterInfo = ThisRegister; ThisEvent++; } /* * Clear the status/enable registers. Note that status registers * are cleared by writing a '1', while enable registers are cleared * by writing a '0'. */ Status = AcpiHwLowLevelWrite (ACPI_GPE_REGISTER_WIDTH, 0x00, &ThisRegister->EnableAddress); if (ACPI_FAILURE (Status)) { goto ErrorExit; } Status = AcpiHwLowLevelWrite (ACPI_GPE_REGISTER_WIDTH, 0xFF, &ThisRegister->StatusAddress); if (ACPI_FAILURE (Status)) { goto ErrorExit; } ThisRegister++; } return_ACPI_STATUS (AE_OK); ErrorExit: if (GpeRegisterInfo) { ACPI_MEM_FREE (GpeRegisterInfo); } if (GpeEventInfo) { ACPI_MEM_FREE (GpeEventInfo); } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvCreateGpeBlock * * PARAMETERS: GpeDevice - Handle to the parent GPE block * GpeBlockAddress - Address and SpaceID * RegisterCount - Number of GPE register pairs in the block * GpeBlockBaseNumber - Starting GPE number for the block * InterruptLevel - H/W interrupt for the block * ReturnGpeBlock - Where the new block descriptor is returned * * RETURN: Status * * DESCRIPTION: Create and Install a block of GPE registers * ******************************************************************************/ ACPI_STATUS AcpiEvCreateGpeBlock ( ACPI_NAMESPACE_NODE *GpeDevice, ACPI_GENERIC_ADDRESS *GpeBlockAddress, UINT32 RegisterCount, UINT8 GpeBlockBaseNumber, UINT32 InterruptLevel, ACPI_GPE_BLOCK_INFO **ReturnGpeBlock) { ACPI_GPE_BLOCK_INFO *GpeBlock; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvCreateGpeBlock"); if (!RegisterCount) { return_ACPI_STATUS (AE_OK); } /* Allocate a new GPE block */ GpeBlock = ACPI_MEM_CALLOCATE (sizeof (ACPI_GPE_BLOCK_INFO)); if (!GpeBlock) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Initialize the new GPE block */ GpeBlock->RegisterCount = RegisterCount; GpeBlock->BlockBaseNumber = GpeBlockBaseNumber; ACPI_MEMCPY (&GpeBlock->BlockAddress, GpeBlockAddress, sizeof (ACPI_GENERIC_ADDRESS)); /* Create the RegisterInfo and EventInfo sub-structures */ Status = AcpiEvCreateGpeInfoBlocks (GpeBlock); if (ACPI_FAILURE (Status)) { ACPI_MEM_FREE (GpeBlock); return_ACPI_STATUS (Status); } /* Install the new block in the global list(s) */ Status = AcpiEvInstallGpeBlock (GpeBlock, InterruptLevel); if (ACPI_FAILURE (Status)) { ACPI_MEM_FREE (GpeBlock); return_ACPI_STATUS (Status); } /* Dump info about this GPE block */ ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "GPE %02d to %02d [%4.4s] %d regs at %8.8X%8.8X on int %d\n", GpeBlock->BlockBaseNumber, (UINT32) (GpeBlock->BlockBaseNumber + ((GpeBlock->RegisterCount * ACPI_GPE_REGISTER_WIDTH) -1)), GpeDevice->Name.Ascii, GpeBlock->RegisterCount, ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (GpeBlock->BlockAddress.Address)), InterruptLevel)); /* Find all GPE methods (_Lxx, _Exx) for this block */ Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD, GpeDevice, ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, AcpiEvSaveMethodInfo, GpeBlock, NULL); /* Return the new block */ if (ReturnGpeBlock) { (*ReturnGpeBlock) = GpeBlock; } return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvGpeInitialize * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Initialize the GPE data structures * ******************************************************************************/ ACPI_STATUS AcpiEvGpeInitialize (void) { UINT32 RegisterCount0 = 0; UINT32 RegisterCount1 = 0; UINT32 GpeNumberMax = 0; ACPI_HANDLE GpeDevice; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvGpeInitialize"); /* Get a handle to the predefined _GPE object */ Status = AcpiGetHandle (NULL, "\\_GPE", &GpeDevice); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* * Initialize the GPE Blocks defined in the FADT * * Why the GPE register block lengths are divided by 2: From the ACPI Spec, * section "General-Purpose Event Registers", we have: * * "Each register block contains two registers of equal length * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN * The length of the GPE1_STS and GPE1_EN registers is equal to * half the GPE1_LEN. If a generic register block is not supported * then its respective block pointer and block length values in the * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need * to be the same size." */ /* * Determine the maximum GPE number for this machine. * * Note: both GPE0 and GPE1 are optional, and either can exist without * the other. * * If EITHER the register length OR the block address are zero, then that * particular block is not supported. */ if (AcpiGbl_FADT->Gpe0BlkLen && ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address)) { /* GPE block 0 exists (has both length and address > 0) */ RegisterCount0 = (UINT16) (AcpiGbl_FADT->Gpe0BlkLen / 2); GpeNumberMax = (RegisterCount0 * ACPI_GPE_REGISTER_WIDTH) - 1; /* Install GPE Block 0 */ Status = AcpiEvCreateGpeBlock (GpeDevice, &AcpiGbl_FADT->XGpe0Blk, RegisterCount0, 0, AcpiGbl_FADT->SciInt, &AcpiGbl_GpeFadtBlocks[0]); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (( "Could not create GPE Block 0, %s\n", AcpiFormatException (Status))); } } if (AcpiGbl_FADT->Gpe1BlkLen && ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address)) { /* GPE block 1 exists (has both length and address > 0) */ RegisterCount1 = (UINT16) (AcpiGbl_FADT->Gpe1BlkLen / 2); /* Check for GPE0/GPE1 overlap (if both banks exist) */ if ((RegisterCount0) && (GpeNumberMax >= AcpiGbl_FADT->Gpe1Base)) { ACPI_REPORT_ERROR (( "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1\n", GpeNumberMax, AcpiGbl_FADT->Gpe1Base, AcpiGbl_FADT->Gpe1Base + ((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1))); /* Ignore GPE1 block by setting the register count to zero */ RegisterCount1 = 0; } else { /* Install GPE Block 1 */ Status = AcpiEvCreateGpeBlock (GpeDevice, &AcpiGbl_FADT->XGpe1Blk, RegisterCount1, AcpiGbl_FADT->Gpe1Base, AcpiGbl_FADT->SciInt, &AcpiGbl_GpeFadtBlocks[1]); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (( "Could not create GPE Block 1, %s\n", AcpiFormatException (Status))); } /* * GPE0 and GPE1 do not have to be contiguous in the GPE number * space. However, GPE0 always starts at GPE number zero. */ GpeNumberMax = AcpiGbl_FADT->Gpe1Base + ((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1); } } /* Exit if there are no GPE registers */ if ((RegisterCount0 + RegisterCount1) == 0) { /* GPEs are not required by ACPI, this is OK */ ACPI_REPORT_INFO (("There are no GPE blocks defined in the FADT\n")); return_ACPI_STATUS (AE_OK); } /* Check for Max GPE number out-of-range */ if (GpeNumberMax > ACPI_GPE_MAX) { ACPI_REPORT_ERROR (("Maximum GPE number from FADT is too large: 0x%X\n", GpeNumberMax)); return_ACPI_STATUS (AE_BAD_VALUE); } return_ACPI_STATUS (AE_OK); }