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Diffstat (limited to 'sys/contrib/dev/acpica/evevent.c')
| -rw-r--r-- | sys/contrib/dev/acpica/evevent.c | 1095 |
1 files changed, 1095 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/evevent.c b/sys/contrib/dev/acpica/evevent.c new file mode 100644 index 0000000..fe4bc56 --- /dev/null +++ b/sys/contrib/dev/acpica/evevent.c @@ -0,0 +1,1095 @@ +/****************************************************************************** + * + * Module Name: evevent - Fixed and General Purpose Even handling and dispatch + * $Revision: 96 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2002, 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 ("evevent") + + +/******************************************************************************* + * + * FUNCTION: AcpiEvInitialize + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Initialize global data structures for events. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvInitialize ( + void) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE ("EvInitialize"); + + + /* Make sure we have ACPI tables */ + + if (!AcpiGbl_DSDT) + { + ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No ACPI tables present!\n")); + return_ACPI_STATUS (AE_NO_ACPI_TABLES); + } + + /* + * Initialize the Fixed and General Purpose AcpiEvents prior. This is + * done prior to enabling SCIs to prevent interrupts from occuring + * before handers are installed. + */ + Status = AcpiEvFixedEventInitialize (); + if (ACPI_FAILURE (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_FATAL, + "Unable to initialize fixed events, %s\n", + AcpiFormatException (Status))); + return_ACPI_STATUS (Status); + } + + Status = AcpiEvGpeInitialize (); + if (ACPI_FAILURE (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_FATAL, + "Unable to initialize general purpose events, %s\n", + AcpiFormatException (Status))); + return_ACPI_STATUS (Status); + } + + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvHandlerInitialize + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Install handlers for the SCI, Global Lock, and GPEs. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvHandlerInitialize ( + void) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE ("EvHandlerInitialize"); + + + /* Install the SCI handler */ + + Status = AcpiEvInstallSciHandler (); + if (ACPI_FAILURE (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_FATAL, + "Unable to install System Control Interrupt Handler, %s\n", + AcpiFormatException (Status))); + return_ACPI_STATUS (Status); + } + + /* Install handlers for control method GPE handlers (_Lxx, _Exx) */ + + Status = AcpiEvInitGpeControlMethods (); + if (ACPI_FAILURE (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_FATAL, + "Unable to initialize GPE control methods, %s\n", + AcpiFormatException (Status))); + return_ACPI_STATUS (Status); + } + + /* Install the handler for the Global Lock */ + + Status = AcpiEvInitGlobalLockHandler (); + if (ACPI_FAILURE (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_FATAL, + "Unable to initialize Global Lock handler, %s\n", + AcpiFormatException (Status))); + return_ACPI_STATUS (Status); + } + + AcpiGbl_EventsInitialized = TRUE; + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvFixedEventInitialize + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Install the fixed event handlers and enable the fixed events. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvFixedEventInitialize ( + void) +{ + NATIVE_UINT i; + ACPI_STATUS Status; + + + /* + * Initialize the structure that keeps track of fixed event handlers + * and enable the fixed events. + */ + for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) + { + AcpiGbl_FixedEventHandlers[i].Handler = NULL; + AcpiGbl_FixedEventHandlers[i].Context = NULL; + + /* Enable the fixed event */ + + if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF) + { + Status = AcpiSetRegister (AcpiGbl_FixedEventInfo[i].EnableRegisterId, + 0, ACPI_MTX_LOCK); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + } + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvFixedEventDetect + * + * PARAMETERS: None + * + * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED + * + * DESCRIPTION: Checks the PM status register for fixed events + * + ******************************************************************************/ + +UINT32 +AcpiEvFixedEventDetect ( + void) +{ + UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; + UINT32 FixedStatus; + UINT32 FixedEnable; + NATIVE_UINT_MAX32 i; + + + ACPI_FUNCTION_NAME ("EvFixedEventDetect"); + + + /* + * Read the fixed feature status and enable registers, as all the cases + * depend on their values. Ignore errors here. + */ + (void) AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, &FixedStatus); + (void) AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_ENABLE, &FixedEnable); + + ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, + "Fixed AcpiEvent Block: Enable %08X Status %08X\n", + FixedEnable, FixedStatus)); + + /* + * Check for all possible Fixed Events and dispatch those that are active + */ + for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) + { + /* Both the status and enable bits must be on for this event */ + + if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) && + (FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask)) + { + /* Found an active (signalled) event */ + + IntStatus |= AcpiEvFixedEventDispatch (i); + } + } + + return (IntStatus); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvFixedEventDispatch + * + * PARAMETERS: Event - Event type + * + * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED + * + * DESCRIPTION: Clears the status bit for the requested event, calls the + * handler that previously registered for the event. + * + ******************************************************************************/ + +UINT32 +AcpiEvFixedEventDispatch ( + UINT32 Event) +{ + + + ACPI_FUNCTION_ENTRY (); + + + /* Clear the status bit */ + + (void) AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].StatusRegisterId, + 1, ACPI_MTX_DO_NOT_LOCK); + + /* + * Make sure we've got a handler. If not, report an error. + * The event is disabled to prevent further interrupts. + */ + if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler) + { + (void) AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId, + 0, ACPI_MTX_DO_NOT_LOCK); + + ACPI_REPORT_ERROR ( + ("EvGpeDispatch: No installed handler for fixed event [%08X]\n", + Event)); + + return (ACPI_INTERRUPT_NOT_HANDLED); + } + + /* Invoke the Fixed Event handler */ + + return ((AcpiGbl_FixedEventHandlers[Event].Handler)( + AcpiGbl_FixedEventHandlers[Event].Context)); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvGpeInitialize + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Initialize the GPE data structures + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvGpeInitialize (void) +{ + NATIVE_UINT_MAX32 i; + NATIVE_UINT_MAX32 j; + UINT32 GpeBlock; + UINT32 GpeRegister; + UINT32 GpeNumberIndex; + UINT32 GpeNumber; + ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE ("EvGpeInitialize"); + + + /* + * Initialize the GPE Block globals + * + * Why the GPE register block lengths 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." + */ + AcpiGbl_GpeBlockInfo[0].AddressSpaceId = AcpiGbl_FADT->XGpe0Blk.AddressSpaceId; + AcpiGbl_GpeBlockInfo[1].AddressSpaceId = AcpiGbl_FADT->XGpe1Blk.AddressSpaceId; + + AcpiGbl_GpeBlockInfo[0].RegisterCount = (UINT16) ACPI_DIV_16 (AcpiGbl_FADT->XGpe0Blk.RegisterBitWidth); + AcpiGbl_GpeBlockInfo[1].RegisterCount = (UINT16) ACPI_DIV_16 (AcpiGbl_FADT->XGpe1Blk.RegisterBitWidth); + + AcpiGbl_GpeBlockInfo[0].BlockAddress = &AcpiGbl_FADT->XGpe0Blk; + AcpiGbl_GpeBlockInfo[1].BlockAddress = &AcpiGbl_FADT->XGpe1Blk; + + AcpiGbl_GpeBlockInfo[0].BlockBaseNumber = 0; + AcpiGbl_GpeBlockInfo[1].BlockBaseNumber = AcpiGbl_FADT->Gpe1Base; + + /* Warn and exit if there are no GPE registers */ + + AcpiGbl_GpeRegisterCount = AcpiGbl_GpeBlockInfo[0].RegisterCount + + AcpiGbl_GpeBlockInfo[1].RegisterCount; + if (!AcpiGbl_GpeRegisterCount) + { + ACPI_REPORT_WARNING (("There are no GPE blocks defined in the FADT\n")); + return_ACPI_STATUS (AE_OK); + } + + /* + * Determine the maximum GPE number for this machine. + * Note: both GPE0 and GPE1 are optional, and either can exist without + * the other + */ + if (AcpiGbl_GpeBlockInfo[0].RegisterCount) + { + /* GPE block 0 exists */ + + AcpiGbl_GpeNumberMax = ACPI_MUL_8 (AcpiGbl_GpeBlockInfo[0].RegisterCount) - 1; + } + + if (AcpiGbl_GpeBlockInfo[1].RegisterCount) + { + /* GPE block 1 exists */ + + /* Check for GPE0/GPE1 overlap (if both banks exist) */ + + if ((AcpiGbl_GpeBlockInfo[0].RegisterCount) && + (AcpiGbl_GpeNumberMax >= AcpiGbl_FADT->Gpe1Base)) + { + ACPI_REPORT_ERROR (( + "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d)\n", + AcpiGbl_GpeNumberMax, AcpiGbl_FADT->Gpe1Base, + AcpiGbl_FADT->Gpe1Base + (ACPI_MUL_8 (AcpiGbl_GpeBlockInfo[1].RegisterCount) - 1))); + return_ACPI_STATUS (AE_BAD_VALUE); + } + + /* + * GPE0 and GPE1 do not have to be contiguous in the GPE number space, + * But, GPE0 always starts at zero. + */ + AcpiGbl_GpeNumberMax = AcpiGbl_FADT->Gpe1Base + + (ACPI_MUL_8 (AcpiGbl_GpeBlockInfo[1].RegisterCount) - 1); + } + + /* Check for Max GPE number out-of-range */ + + if (AcpiGbl_GpeNumberMax > ACPI_GPE_MAX) + { + ACPI_REPORT_ERROR (("Maximum GPE number from FADT is too large: 0x%X\n", + AcpiGbl_GpeNumberMax)); + return_ACPI_STATUS (AE_BAD_VALUE); + } + + /* Allocate the GPE number-to-index translation table */ + + AcpiGbl_GpeNumberToIndex = ACPI_MEM_CALLOCATE ( + sizeof (ACPI_GPE_INDEX_INFO) * + ((ACPI_SIZE) AcpiGbl_GpeNumberMax + 1)); + if (!AcpiGbl_GpeNumberToIndex) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Could not allocate the GpeNumberToIndex table\n")); + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Set the Gpe index table to GPE_INVALID */ + + ACPI_MEMSET (AcpiGbl_GpeNumberToIndex, (int) ACPI_GPE_INVALID, + sizeof (ACPI_GPE_INDEX_INFO) * ((ACPI_SIZE) AcpiGbl_GpeNumberMax + 1)); + + /* Allocate the GPE register information block */ + + AcpiGbl_GpeRegisterInfo = ACPI_MEM_CALLOCATE ( + (ACPI_SIZE) AcpiGbl_GpeRegisterCount * + sizeof (ACPI_GPE_REGISTER_INFO)); + if (!AcpiGbl_GpeRegisterInfo) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Could not allocate the GpeRegisterInfo table\n")); + goto ErrorExit1; + } + + /* + * Allocate the GPE dispatch handler block. There are eight distinct GPEs + * per register. Initialization to zeros is sufficient. + */ + AcpiGbl_GpeNumberInfo = ACPI_MEM_CALLOCATE ( + (ACPI_SIZE) ACPI_MUL_8 (AcpiGbl_GpeRegisterCount) * + sizeof (ACPI_GPE_NUMBER_INFO)); + if (!AcpiGbl_GpeNumberInfo) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not allocate the GpeNumberInfo table\n")); + goto ErrorExit2; + } + + /* + * Initialize the GPE information and validation tables. 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. Another goal is to hide + * the fact that there may be multiple GPE hardware blocks. + */ + GpeRegister = 0; + GpeNumberIndex = 0; + + for (GpeBlock = 0; GpeBlock < ACPI_MAX_GPE_BLOCKS; GpeBlock++) + { + for (i = 0; i < AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount; i++) + { + GpeRegisterInfo = &AcpiGbl_GpeRegisterInfo[GpeRegister]; + + /* Init the Register info for this entire GPE register (8 GPEs) */ + + GpeRegisterInfo->BaseGpeNumber = (UINT8) (AcpiGbl_GpeBlockInfo[GpeBlock].BlockBaseNumber + + (ACPI_MUL_8 (i))); + + ACPI_STORE_ADDRESS (GpeRegisterInfo->StatusAddress.Address, + (ACPI_GET_ADDRESS (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->Address) + + i)); + + ACPI_STORE_ADDRESS (GpeRegisterInfo->EnableAddress.Address, + (ACPI_GET_ADDRESS (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->Address) + + i + + AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount)); + + GpeRegisterInfo->StatusAddress.AddressSpaceId = AcpiGbl_GpeBlockInfo[GpeBlock].AddressSpaceId; + GpeRegisterInfo->EnableAddress.AddressSpaceId = AcpiGbl_GpeBlockInfo[GpeBlock].AddressSpaceId; + GpeRegisterInfo->StatusAddress.RegisterBitWidth = 8; + GpeRegisterInfo->EnableAddress.RegisterBitWidth = 8; + GpeRegisterInfo->StatusAddress.RegisterBitOffset = 8; + GpeRegisterInfo->EnableAddress.RegisterBitOffset = 8; + + /* Init the Index mapping info for each GPE number within this register */ + + for (j = 0; j < 8; j++) + { + GpeNumber = GpeRegisterInfo->BaseGpeNumber + j; + AcpiGbl_GpeNumberToIndex[GpeNumber].NumberIndex = (UINT8) GpeNumberIndex; + + AcpiGbl_GpeNumberInfo[GpeNumberIndex].BitMask = AcpiGbl_DecodeTo8bit[j]; + GpeNumberIndex++; + } + + /* + * 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 (8, 0x00, &GpeRegisterInfo->EnableAddress, 0); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + Status = AcpiHwLowLevelWrite (8, 0xFF, &GpeRegisterInfo->StatusAddress, 0); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + GpeRegister++; + } + + if (i) + { + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "GPE Block%d: %X registers at %8.8X%8.8X\n", + (INT32) GpeBlock, AcpiGbl_GpeBlockInfo[0].RegisterCount, + ACPI_HIDWORD (ACPI_GET_ADDRESS (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->Address)), + ACPI_LODWORD (ACPI_GET_ADDRESS (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress->Address)))); + + ACPI_REPORT_INFO (("GPE Block%d defined as GPE%d to GPE%d\n", + (INT32) GpeBlock, + (UINT32) AcpiGbl_GpeBlockInfo[GpeBlock].BlockBaseNumber, + (UINT32) (AcpiGbl_GpeBlockInfo[GpeBlock].BlockBaseNumber + + ((AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount * 8) -1)))); + } + } + + return_ACPI_STATUS (AE_OK); + + + /* Error cleanup */ + +ErrorExit2: + ACPI_MEM_FREE (AcpiGbl_GpeRegisterInfo); + +ErrorExit1: + ACPI_MEM_FREE (AcpiGbl_GpeNumberToIndex); + return_ACPI_STATUS (AE_NO_MEMORY); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvSaveMethodInfo + * + * PARAMETERS: None + * + * RETURN: None + * + * 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) +{ + UINT32 GpeNumber; + UINT32 GpeNumberIndex; + NATIVE_CHAR Name[ACPI_NAME_SIZE + 1]; + UINT8 Type; + ACPI_STATUS Status; + + + ACPI_FUNCTION_NAME ("EvSaveMethodInfo"); + + + /* Extract the name from the object and convert to a string */ + + ACPI_MOVE_UNALIGNED32_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 (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 not of form _Lnn or _Enn)\n", + Name)); + return (AE_OK); + } + + /* Get GPE index and ensure that we have a valid GPE number */ + + GpeNumberIndex = AcpiEvGetGpeNumberIndex (GpeNumber); + if (GpeNumberIndex == ACPI_GPE_INVALID) + { + /* Not valid, all we can do here is ignore it */ + + return (AE_OK); + } + + /* + * Now we can add this information to the GpeInfo block + * for use during dispatch of this GPE. + */ + AcpiGbl_GpeNumberInfo [GpeNumberIndex].Type = Type; + AcpiGbl_GpeNumberInfo [GpeNumberIndex].MethodHandle = ObjHandle; + + /* + * Enable the GPE (SCIs should be disabled at this point) + */ + Status = AcpiHwEnableGpe (GpeNumber); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Registered GPE method %s as GPE number %X\n", + Name, GpeNumber)); + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvInitGpeControlMethods + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Obtain the control methods associated with the GPEs. + * NOTE: Must be called AFTER namespace initialization! + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvInitGpeControlMethods (void) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE ("EvInitGpeControlMethods"); + + + /* Get a permanent handle to the _GPE object */ + + Status = AcpiGetHandle (NULL, "\\_GPE", &AcpiGbl_GpeObjHandle); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Traverse the namespace under \_GPE to find all methods there */ + + Status = AcpiWalkNamespace (ACPI_TYPE_METHOD, AcpiGbl_GpeObjHandle, + ACPI_UINT32_MAX, AcpiEvSaveMethodInfo, + NULL, NULL); + + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvGpeDetect + * + * PARAMETERS: None + * + * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED + * + * DESCRIPTION: Detect if any GP events have occurred. This function is + * executed at interrupt level. + * + ******************************************************************************/ + +UINT32 +AcpiEvGpeDetect (void) +{ + UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; + UINT32 i; + UINT32 j; + UINT8 EnabledStatusByte; + UINT8 BitMask; + ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; + UINT32 InValue; + ACPI_STATUS Status; + + + ACPI_FUNCTION_NAME ("EvGpeDetect"); + + + /* + * Read all of the 8-bit GPE status and enable registers + * in both of the register blocks, saving all of it. + * Find all currently active GP events. + */ + for (i = 0; i < AcpiGbl_GpeRegisterCount; i++) + { + GpeRegisterInfo = &AcpiGbl_GpeRegisterInfo[i]; + + Status = AcpiHwLowLevelRead (8, &InValue, &GpeRegisterInfo->StatusAddress, 0); + GpeRegisterInfo->Status = (UINT8) InValue; + if (ACPI_FAILURE (Status)) + { + return (ACPI_INTERRUPT_NOT_HANDLED); + } + + Status = AcpiHwLowLevelRead (8, &InValue, &GpeRegisterInfo->EnableAddress, 0); + GpeRegisterInfo->Enable = (UINT8) InValue; + if (ACPI_FAILURE (Status)) + { + return (ACPI_INTERRUPT_NOT_HANDLED); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, + "GPE block at %8.8X%8.8X - Values: Enable %02X Status %02X\n", + ACPI_HIDWORD (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)), + ACPI_LODWORD (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)), + GpeRegisterInfo->Enable, + GpeRegisterInfo->Status)); + + /* First check if there is anything active at all in this register */ + + EnabledStatusByte = (UINT8) (GpeRegisterInfo->Status & + GpeRegisterInfo->Enable); + if (!EnabledStatusByte) + { + /* No active GPEs in this register, move on */ + + continue; + } + + /* Now look at the individual GPEs in this byte register */ + + for (j = 0, BitMask = 1; j < 8; j++, BitMask <<= 1) + { + /* Examine one GPE bit */ + + if (EnabledStatusByte & BitMask) + { + /* + * Found an active GPE. Dispatch the event to a handler + * or method. + */ + IntStatus |= AcpiEvGpeDispatch ( + GpeRegisterInfo->BaseGpeNumber + j); + } + } + } + + return (IntStatus); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvAsynchExecuteGpeMethod + * + * PARAMETERS: GpeNumber - The 0-based GPE number + * + * RETURN: None + * + * DESCRIPTION: Perform the actual execution of a GPE control method. This + * function is called from an invocation of AcpiOsQueueForExecution + * (and therefore does NOT execute at interrupt level) so that + * the control method itself is not executed in the context of + * the SCI interrupt handler. + * + ******************************************************************************/ + +static void ACPI_SYSTEM_XFACE +AcpiEvAsynchExecuteGpeMethod ( + void *Context) +{ + UINT32 GpeNumber = (UINT32) ACPI_TO_INTEGER (Context); + UINT32 GpeNumberIndex; + ACPI_GPE_NUMBER_INFO GpeInfo; + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE ("EvAsynchExecuteGpeMethod"); + + + GpeNumberIndex = AcpiEvGetGpeNumberIndex (GpeNumber); + if (GpeNumberIndex == ACPI_GPE_INVALID) + { + return_VOID; + } + + /* + * Take a snapshot of the GPE info for this level - we copy the + * info to prevent a race condition with RemoveHandler. + */ + Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); + if (ACPI_FAILURE (Status)) + { + return_VOID; + } + + GpeInfo = AcpiGbl_GpeNumberInfo [GpeNumberIndex]; + Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); + if (ACPI_FAILURE (Status)) + { + return_VOID; + } + + if (GpeInfo.MethodHandle) + { + /* + * Invoke the GPE Method (_Lxx, _Exx): + * (Evaluate the _Lxx/_Exx control method that corresponds to this GPE.) + */ + Status = AcpiNsEvaluateByHandle (GpeInfo.MethodHandle, NULL, NULL); + if (ACPI_FAILURE (Status)) + { + ACPI_REPORT_ERROR (("%s while evaluating GPE%X method\n", + AcpiFormatException (Status), GpeNumber)); + } + } + + if (GpeInfo.Type & ACPI_EVENT_LEVEL_TRIGGERED) + { + /* + * GPE is level-triggered, we clear the GPE status bit after handling + * the event. + */ + Status = AcpiHwClearGpe (GpeNumber); + if (ACPI_FAILURE (Status)) + { + return_VOID; + } + } + + /* + * Enable the GPE. + */ + (void) AcpiHwEnableGpe (GpeNumber); + return_VOID; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvGpeDispatch + * + * PARAMETERS: GpeNumber - The 0-based GPE number + * + * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED + * + * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) + * or method (e.g. _Lxx/_Exx) handler. This function executes + * at interrupt level. + * + ******************************************************************************/ + +UINT32 +AcpiEvGpeDispatch ( + UINT32 GpeNumber) +{ + UINT32 GpeNumberIndex; + ACPI_GPE_NUMBER_INFO *GpeInfo; + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE ("EvGpeDispatch"); + + + GpeNumberIndex = AcpiEvGetGpeNumberIndex (GpeNumber); + if (GpeNumberIndex == ACPI_GPE_INVALID) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "GPE[%X] is not a valid event\n", GpeNumber)); + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + } + + /* + * We don't have to worry about mutex on GpeInfo because we are + * executing at interrupt level. + */ + GpeInfo = &AcpiGbl_GpeNumberInfo [GpeNumberIndex]; + + /* + * If edge-triggered, clear the GPE status bit now. Note that + * level-triggered events are cleared after the GPE is serviced. + */ + if (GpeInfo->Type & ACPI_EVENT_EDGE_TRIGGERED) + { + Status = AcpiHwClearGpe (GpeNumber); + if (ACPI_FAILURE (Status)) + { + ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%X]\n", GpeNumber)); + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + } + } + + /* + * Dispatch the GPE to either an installed handler, or the control + * method associated with this GPE (_Lxx or _Exx). + * If a handler exists, we invoke it and do not attempt to run the method. + * If there is neither a handler nor a method, we disable the level to + * prevent further events from coming in here. + */ + if (GpeInfo->Handler) + { + /* Invoke the installed handler (at interrupt level) */ + + GpeInfo->Handler (GpeInfo->Context); + } + else if (GpeInfo->MethodHandle) + { + /* + * Disable GPE, so it doesn't keep firing before the method has a + * chance to run. + */ + Status = AcpiHwDisableGpe (GpeNumber); + if (ACPI_FAILURE (Status)) + { + ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to disable GPE[%X]\n", GpeNumber)); + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + } + + /* + * Execute the method associated with the GPE. + */ + if (ACPI_FAILURE (AcpiOsQueueForExecution (OSD_PRIORITY_GPE, + AcpiEvAsynchExecuteGpeMethod, + ACPI_TO_POINTER (GpeNumber)))) + { + ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to queue handler for GPE[%X], event is disabled\n", GpeNumber)); + } + } + else + { + /* No handler or method to run! */ + + ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: No handler or method for GPE[%X], disabling event\n", GpeNumber)); + + /* + * Disable the GPE. The GPE will remain disabled until the ACPI + * Core Subsystem is restarted, or the handler is reinstalled. + */ + Status = AcpiHwDisableGpe (GpeNumber); + if (ACPI_FAILURE (Status)) + { + ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to disable GPE[%X]\n", GpeNumber)); + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + } + } + + /* + * It is now safe to clear level-triggered evnets. + */ + if (GpeInfo->Type & ACPI_EVENT_LEVEL_TRIGGERED) + { + Status = AcpiHwClearGpe (GpeNumber); + if (ACPI_FAILURE (Status)) + { + ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%X]\n", GpeNumber)); + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + } + } + + return_VALUE (ACPI_INTERRUPT_HANDLED); +} |
