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b229cf92ee
Removed a device initialization optimization introduced in 20051216 where the _STA method was not run unless an _INI was also present for the same device. This optimization could cause problems because it could allow _INI methods to be run within a not-present device subtree (If a not-present device had no _INI, _STA would not be run, the not-present status would not be discovered, and the children of the device would be incorrectly traversed.) Implemented a new _STA optimization where namespace subtrees that do not contain _INI are identified and ignored during device initialization. Selectively running _STA can significantly improve boot time on large machines (with assistance from Len Brown.) Implemented support for the device initialization case where the returned _STA flags indicate a device not-present but functioning. In this case, _INI is not run, but the device children are examined for presence, as per the ACPI specification. Implemented an additional change to the IndexField support in order to conform to MS behavior. The value written to the Index Register is not simply a byte offset, it is a byte offset in units of the access width of the parent Index Field. (Fiodor Suietov) Defined and deployed a new OSL interface, acpi_os_validate_address(). This interface is called during the creation of all AML operation regions, and allows the host OS to exert control over what addresses it will allow the AML code to access. Operation Regions whose addresses are disallowed will cause a runtime exception when they are actually accessed (will not affect or abort table loading.) Defined and deployed a new OSL interface, acpi_os_validate_interface(). This interface allows the host OS to match the various "optional" interface/behavior strings for the _OSI predefined control method as appropriate (with assistance from Bjorn Helgaas.) Restructured and corrected various problems in the exception handling code paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod (with assistance from Takayoshi Kochi.) Modified the Linux source converter to ignore quoted string literals while converting identifiers from mixed to lower case. This will correct problems with the disassembler and other areas where such strings must not be modified. The ACPI_FUNCTION_* macros no longer require quotes around the function name. This allows the Linux source converter to convert the names, now that the converter ignores quoted strings. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
342 lines
10 KiB
C
342 lines
10 KiB
C
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/******************************************************************************
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*
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* Module Name: exsystem - Interface to OS services
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2006, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acinterp.h>
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#include <acpi/acevents.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exsystem")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_wait_semaphore
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*
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* PARAMETERS: Semaphore - Semaphore to wait on
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* Timeout - Max time to wait
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*
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* RETURN: Status
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*
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* DESCRIPTION: Implements a semaphore wait with a check to see if the
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* semaphore is available immediately. If it is not, the
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* interpreter is released.
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*
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******************************************************************************/
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acpi_status acpi_ex_system_wait_semaphore(acpi_handle semaphore, u16 timeout)
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{
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acpi_status status;
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acpi_status status2;
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ACPI_FUNCTION_TRACE(ex_system_wait_semaphore);
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status = acpi_os_wait_semaphore(semaphore, 1, 0);
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if (ACPI_SUCCESS(status)) {
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return_ACPI_STATUS(status);
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}
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if (status == AE_TIME) {
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/* We must wait, so unlock the interpreter */
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acpi_ex_exit_interpreter();
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status = acpi_os_wait_semaphore(semaphore, 1, timeout);
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"*** Thread awake after blocking, %s\n",
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acpi_format_exception(status)));
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/* Reacquire the interpreter */
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status2 = acpi_ex_enter_interpreter();
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if (ACPI_FAILURE(status2)) {
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/* Report fatal error, could not acquire interpreter */
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return_ACPI_STATUS(status2);
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}
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_do_stall
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*
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* PARAMETERS: how_long - The amount of time to stall,
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* in microseconds
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*
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* RETURN: Status
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*
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* DESCRIPTION: Suspend running thread for specified amount of time.
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* Note: ACPI specification requires that Stall() does not
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* relinquish the processor, and delays longer than 100 usec
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* should use Sleep() instead. We allow stalls up to 255 usec
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* for compatibility with other interpreters and existing BIOSs.
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*
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******************************************************************************/
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acpi_status acpi_ex_system_do_stall(u32 how_long)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_ENTRY();
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if (how_long > 255) { /* 255 microseconds */
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/*
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* Longer than 255 usec, this is an error
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*
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* (ACPI specifies 100 usec as max, but this gives some slack in
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* order to support existing BIOSs)
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*/
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ACPI_ERROR((AE_INFO, "Time parameter is too large (%d)",
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how_long));
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status = AE_AML_OPERAND_VALUE;
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} else {
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acpi_os_stall(how_long);
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}
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_do_suspend
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*
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* PARAMETERS: how_long - The amount of time to suspend,
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* in milliseconds
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*
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* RETURN: None
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*
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* DESCRIPTION: Suspend running thread for specified amount of time.
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*
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******************************************************************************/
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acpi_status acpi_ex_system_do_suspend(acpi_integer how_long)
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{
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acpi_status status;
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ACPI_FUNCTION_ENTRY();
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/* Since this thread will sleep, we must release the interpreter */
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acpi_ex_exit_interpreter();
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acpi_os_sleep(how_long);
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/* And now we must get the interpreter again */
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status = acpi_ex_enter_interpreter();
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_acquire_mutex
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*
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* PARAMETERS: time_desc - The 'time to delay' object descriptor
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* obj_desc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML. This function will cause a lock to be generated
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* for the Mutex pointed to by obj_desc.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_system_acquire_mutex(union acpi_operand_object * time_desc,
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union acpi_operand_object * obj_desc)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE_PTR(ex_system_acquire_mutex, obj_desc);
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if (!obj_desc) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Support for the _GL_ Mutex object -- go get the global lock */
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if (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore) {
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status =
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acpi_ev_acquire_global_lock((u16) time_desc->integer.value);
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return_ACPI_STATUS(status);
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}
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status = acpi_ex_system_wait_semaphore(obj_desc->mutex.semaphore,
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(u16) time_desc->integer.value);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_release_mutex
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*
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* PARAMETERS: obj_desc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML. This operation is a request to release a
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* previously acquired Mutex. If the Mutex variable is set then
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* it will be decremented.
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*
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******************************************************************************/
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acpi_status acpi_ex_system_release_mutex(union acpi_operand_object *obj_desc)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(ex_system_release_mutex);
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if (!obj_desc) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Support for the _GL_ Mutex object -- release the global lock */
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if (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore) {
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status = acpi_ev_release_global_lock();
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return_ACPI_STATUS(status);
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}
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status = acpi_os_signal_semaphore(obj_desc->mutex.semaphore, 1);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_signal_event
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*
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* PARAMETERS: obj_desc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML.
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*
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******************************************************************************/
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acpi_status acpi_ex_system_signal_event(union acpi_operand_object *obj_desc)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(ex_system_signal_event);
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if (obj_desc) {
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status = acpi_os_signal_semaphore(obj_desc->event.semaphore, 1);
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_wait_event
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*
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* PARAMETERS: time_desc - The 'time to delay' object descriptor
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* obj_desc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML. This operation is a request to wait for an
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* event.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_system_wait_event(union acpi_operand_object *time_desc,
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union acpi_operand_object *obj_desc)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(ex_system_wait_event);
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if (obj_desc) {
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status =
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acpi_ex_system_wait_semaphore(obj_desc->event.semaphore,
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(u16) time_desc->integer.
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value);
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_reset_event
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*
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* PARAMETERS: obj_desc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Reset an event to a known state.
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*
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******************************************************************************/
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acpi_status acpi_ex_system_reset_event(union acpi_operand_object *obj_desc)
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{
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acpi_status status = AE_OK;
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void *temp_semaphore;
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ACPI_FUNCTION_ENTRY();
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/*
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* We are going to simply delete the existing semaphore and
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* create a new one!
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*/
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status =
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acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, &temp_semaphore);
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if (ACPI_SUCCESS(status)) {
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(void)acpi_os_delete_semaphore(obj_desc->event.semaphore);
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obj_desc->event.semaphore = temp_semaphore;
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}
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return (status);
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}
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