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author | msmith <msmith@FreeBSD.org> | 2000-10-28 05:01:06 +0000 |
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committer | msmith <msmith@FreeBSD.org> | 2000-10-28 05:01:06 +0000 |
commit | 748be155016b7e29202235815e27acc5ff5e9e87 (patch) | |
tree | 7aa2f379c75259b97c8b033bddc2a8966ec9f18d /sys/contrib/dev/acpica/evmisc.c | |
download | FreeBSD-src-748be155016b7e29202235815e27acc5ff5e9e87.zip FreeBSD-src-748be155016b7e29202235815e27acc5ff5e9e87.tar.gz |
Initial import of the Intel-maintained ACPI Component Architecture. This
is Intel's reference implementation of the core operating-system ACPI
support. (This import is on the vendor branch.)
Diffstat (limited to 'sys/contrib/dev/acpica/evmisc.c')
-rw-r--r-- | sys/contrib/dev/acpica/evmisc.c | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/evmisc.c b/sys/contrib/dev/acpica/evmisc.c new file mode 100644 index 0000000..cdb4af7 --- /dev/null +++ b/sys/contrib/dev/acpica/evmisc.c @@ -0,0 +1,486 @@ +/****************************************************************************** + * + * Module Name: evmisc - ACPI device notification handler dispatch + * and ACPI Global Lock support + * $Revision: 15 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999, 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" +#include "acinterp.h" +#include "achware.h" + +#define _COMPONENT EVENT_HANDLING + MODULE_NAME ("evmisc") + + +/************************************************************************** + * + * FUNCTION: AcpiEvNotifyDispatch + * + * PARAMETERS: + * + * RETURN: None. + * + * DESCRIPTION: Dispatch a device notification event to a previously + * installed handler. + * + *************************************************************************/ + +void +AcpiEvNotifyDispatch ( + ACPI_HANDLE Device, + UINT32 NotifyValue) +{ + ACPI_OPERAND_OBJECT *ObjDesc; + ACPI_OPERAND_OBJECT *HandlerObj; + NOTIFY_HANDLER Handler; + + + /* + * For value 1 (Ejection Request), some device method may need to be run. + * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need to be run. + * For value 0x80 (Status Change) on the power button or sleep button, + * initiate soft-off or sleep operation? + */ + + + DEBUG_PRINT (ACPI_INFO, + ("Dispatching Notify(%d) on device %p\n", NotifyValue, Device)); + + switch (NotifyValue) + { + case 0: + DEBUG_PRINT (ACPI_INFO, ("Notify value: Re-enumerate Devices\n")); + break; + + case 1: + DEBUG_PRINT (ACPI_INFO, ("Notify value: Ejection Request\n")); + break; + + case 2: + DEBUG_PRINT (ACPI_INFO, ("Notify value: Device Wake\n")); + break; + + case 0x80: + DEBUG_PRINT (ACPI_INFO, ("Notify value: Status Change\n")); + break; + + default: + DEBUG_PRINT (ACPI_INFO, ("Unknown Notify Value: %lx \n", NotifyValue)); + break; + } + + + /* + * Invoke a global notify handler if installed. + * This is done _before_ we invoke the per-device handler attached to the device. + */ + + if (NotifyValue <= MAX_SYS_NOTIFY) + { + /* Global system notification handler */ + + if (AcpiGbl_SysNotify.Handler) + { + AcpiGbl_SysNotify.Handler (Device, NotifyValue, + AcpiGbl_SysNotify.Context); + } + } + + else + { + /* Global driver notification handler */ + + if (AcpiGbl_DrvNotify.Handler) + { + AcpiGbl_DrvNotify.Handler (Device, NotifyValue, + AcpiGbl_DrvNotify.Context); + } + } + + + /* + * Get the notify object which must be attached to the device Node + */ + + ObjDesc = AcpiNsGetAttachedObject ((ACPI_HANDLE) Device); + if (!ObjDesc) + { + /* There can be no notify handler for this device */ + + DEBUG_PRINT (ACPI_INFO, + ("No notify handler for device %p \n", Device)); + return; + } + + + /* We have the notify object, Get the right handler */ + + if (NotifyValue <= MAX_SYS_NOTIFY) + { + HandlerObj = ObjDesc->Device.SysHandler; + } + else + { + HandlerObj = ObjDesc->Device.DrvHandler; + } + + /* Validate the handler */ + + if (!HandlerObj) + { + /* There is no notify handler for this device */ + + DEBUG_PRINT (ACPI_INFO, + ("No notify handler for device %p \n", Device)); + return; + } + + /* There is a handler, invoke it */ + + Handler = HandlerObj->NotifyHandler.Handler; + Handler (Device, NotifyValue, HandlerObj->NotifyHandler.Context); + +} + + +/*************************************************************************** + * + * FUNCTION: AcpiEvGlobalLockThread + * + * RETURN: None + * + * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the + * Global Lock. Simply signal all threads that are waiting + * for the lock. + * + **************************************************************************/ + +void +AcpiEvGlobalLockThread ( + void *Context) +{ + + /* Signal threads that are waiting for the lock */ + + if (AcpiGbl_GlobalLockThreadCount) + { + /* Send sufficient units to the semaphore */ + + AcpiOsSignalSemaphore (AcpiGbl_GlobalLockSemaphore, + AcpiGbl_GlobalLockThreadCount); + } +} + + +/*************************************************************************** + * + * FUNCTION: AcpiEvGlobalLockHandler + * + * RETURN: Status + * + * DESCRIPTION: Invoked directly from the SCI handler when a global lock + * release interrupt occurs. Grab the global lock and queue + * the global lock thread for execution + * + **************************************************************************/ + +UINT32 +AcpiEvGlobalLockHandler ( + void *Context) +{ + BOOLEAN Acquired = FALSE; + void *GlobalLock; + + + /* + * Attempt to get the lock + * If we don't get it now, it will be marked pending and we will + * take another interrupt when it becomes free. + */ + + GlobalLock = &AcpiGbl_FACS->GlobalLock; + ACPI_ACQUIRE_GLOBAL_LOCK (GlobalLock, Acquired); + if (Acquired) + { + /* Got the lock, now wake all threads waiting for it */ + + AcpiGbl_GlobalLockAcquired = TRUE; + + /* Run the Global Lock thread which will signal all waiting threads */ + + AcpiOsQueueForExecution (OSD_PRIORITY_HIGH, AcpiEvGlobalLockThread, + Context); + } + + return (INTERRUPT_HANDLED); +} + + +/*************************************************************************** + * + * FUNCTION: AcpiEvInitGlobalLockHandler + * + * RETURN: Status + * + * DESCRIPTION: Install a handler for the global lock release event + * + **************************************************************************/ + +ACPI_STATUS +AcpiEvInitGlobalLockHandler (void) +{ + ACPI_STATUS Status; + + + FUNCTION_TRACE ("EvInitGlobalLockHandler"); + + + Status = AcpiInstallFixedEventHandler (ACPI_EVENT_GLOBAL, + AcpiEvGlobalLockHandler, NULL); + + return_ACPI_STATUS (Status); +} + + +/*************************************************************************** + * + * FUNCTION: AcpiEvAcquireGlobalLock + * + * RETURN: Status + * + * DESCRIPTION: Attempt to gain ownership of the Global Lock. + * + **************************************************************************/ + +ACPI_STATUS +AcpiEvAcquireGlobalLock(void) +{ + ACPI_STATUS Status = AE_OK; + BOOLEAN Acquired = FALSE; + void *GlobalLock; + + + FUNCTION_TRACE ("EvAcquireGlobalLock"); + + + /* One more thread wants the global lock */ + + AcpiGbl_GlobalLockThreadCount++; + + + /* If we (OS side) have the hardware lock already, we are done */ + + if (AcpiGbl_GlobalLockAcquired) + { + return_ACPI_STATUS (AE_OK); + } + + /* Only if the FACS is valid */ + + if (!AcpiGbl_FACS) + { + return_ACPI_STATUS (AE_OK); + } + + + /* We must acquire the actual hardware lock */ + + GlobalLock = &AcpiGbl_FACS->GlobalLock; + ACPI_ACQUIRE_GLOBAL_LOCK (GlobalLock, Acquired); + if (Acquired) + { + /* We got the lock */ + + DEBUG_PRINT (ACPI_INFO, ("Acquired the HW Global Lock\n")); + + AcpiGbl_GlobalLockAcquired = TRUE; + + return_ACPI_STATUS (AE_OK); + } + + + /* + * Did not get the lock. The pending bit was set above, and we must now + * wait until we get the global lock released interrupt. + */ + + DEBUG_PRINT (ACPI_INFO, ("Waiting for the HW Global Lock\n")); + + /* + * Acquire the global lock semaphore first. + * Since this wait will block, we must release the interpreter + */ + + Status = AcpiAmlSystemWaitSemaphore (AcpiGbl_GlobalLockSemaphore, + ACPI_UINT32_MAX); + + return_ACPI_STATUS (Status); +} + + +/*************************************************************************** + * + * FUNCTION: AcpiEvReleaseGlobalLock + * + * DESCRIPTION: Releases ownership of the Global Lock. + * + **************************************************************************/ + +void +AcpiEvReleaseGlobalLock (void) +{ + BOOLEAN Pending = FALSE; + void *GlobalLock; + + + FUNCTION_TRACE ("EvReleaseGlobalLock"); + + if (!AcpiGbl_GlobalLockThreadCount) + { + REPORT_WARNING(("Releasing a non-acquired Global Lock\n")); + return_VOID; + } + + /* One fewer thread has the global lock */ + + AcpiGbl_GlobalLockThreadCount--; + + /* Have all threads released the lock? */ + + if (!AcpiGbl_GlobalLockThreadCount) + { + /* + * No more threads holding lock, we can do the actual hardware + * release + */ + + GlobalLock = &AcpiGbl_FACS->GlobalLock; + ACPI_RELEASE_GLOBAL_LOCK (GlobalLock, Pending); + AcpiGbl_GlobalLockAcquired = FALSE; + + /* + * If the pending bit was set, we must write GBL_RLS to the control + * register + */ + if (Pending) + { + AcpiHwRegisterAccess (ACPI_WRITE, ACPI_MTX_LOCK, + PM1_CONTROL | GBL_RLS, 1); + } + } + + return_VOID; +} |