![Bob Moore](/assets/img/avatar_default.png)
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>
324 lines
9.3 KiB
C
324 lines
9.3 KiB
C
/******************************************************************************
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*
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* Module Name: evevent - Fixed Event handling and dispatch
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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/acevents.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evevent")
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/* Local prototypes */
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static acpi_status acpi_ev_fixed_event_initialize(void);
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static u32 acpi_ev_fixed_event_dispatch(u32 event);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_initialize_events
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
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*
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******************************************************************************/
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acpi_status acpi_ev_initialize_events(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(ev_initialize_events);
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/* Make sure we have ACPI tables */
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if (!acpi_gbl_DSDT) {
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ACPI_WARNING((AE_INFO, "No ACPI tables present!"));
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return_ACPI_STATUS(AE_NO_ACPI_TABLES);
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}
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/*
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* Initialize the Fixed and General Purpose Events. This is done prior to
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* enabling SCIs to prevent interrupts from occurring before the handlers are
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* installed.
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*/
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status = acpi_ev_fixed_event_initialize();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Unable to initialize fixed events"));
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return_ACPI_STATUS(status);
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}
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status = acpi_ev_gpe_initialize();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Unable to initialize general purpose events"));
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return_ACPI_STATUS(status);
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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_ev_install_fadt_gpes
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Completes initialization of the FADT-defined GPE blocks
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* (0 and 1). This causes the _PRW methods to be run, so the HW
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* must be fully initialized at this point, including global lock
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* support.
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*
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******************************************************************************/
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acpi_status acpi_ev_install_fadt_gpes(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(ev_install_fadt_gpes);
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/* Namespace must be locked */
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* FADT GPE Block 0 */
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(void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
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acpi_gbl_gpe_fadt_blocks[0]);
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/* FADT GPE Block 1 */
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(void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
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acpi_gbl_gpe_fadt_blocks[1]);
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_install_xrupt_handlers
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
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*
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******************************************************************************/
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acpi_status acpi_ev_install_xrupt_handlers(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers);
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/* Install the SCI handler */
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status = acpi_ev_install_sci_handler();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Unable to install System Control Interrupt handler"));
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return_ACPI_STATUS(status);
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}
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/* Install the handler for the Global Lock */
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status = acpi_ev_init_global_lock_handler();
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Unable to initialize Global Lock handler"));
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return_ACPI_STATUS(status);
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}
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acpi_gbl_events_initialized = TRUE;
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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_ev_fixed_event_initialize
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install the fixed event handlers and enable the fixed events.
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*
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******************************************************************************/
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static acpi_status acpi_ev_fixed_event_initialize(void)
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{
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acpi_native_uint i;
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acpi_status status;
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/*
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* Initialize the structure that keeps track of fixed event handlers
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* and enable the fixed events.
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*/
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for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
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acpi_gbl_fixed_event_handlers[i].handler = NULL;
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acpi_gbl_fixed_event_handlers[i].context = NULL;
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/* Enable the fixed event */
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if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
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status =
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acpi_set_register(acpi_gbl_fixed_event_info[i].
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enable_register_id, 0,
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ACPI_MTX_LOCK);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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}
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_fixed_event_detect
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*
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* PARAMETERS: None
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Checks the PM status register for active fixed events
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*
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******************************************************************************/
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u32 acpi_ev_fixed_event_detect(void)
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{
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u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
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u32 fixed_status;
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u32 fixed_enable;
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acpi_native_uint i;
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ACPI_FUNCTION_NAME(ev_fixed_event_detect);
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/*
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* Read the fixed feature status and enable registers, as all the cases
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* depend on their values. Ignore errors here.
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*/
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(void)acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_STATUS, &fixed_status);
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(void)acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
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ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
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"Fixed Event Block: Enable %08X Status %08X\n",
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fixed_enable, fixed_status));
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/*
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* Check for all possible Fixed Events and dispatch those that are active
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*/
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for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
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/* Both the status and enable bits must be on for this event */
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if ((fixed_status & acpi_gbl_fixed_event_info[i].
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status_bit_mask)
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&& (fixed_enable & acpi_gbl_fixed_event_info[i].
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enable_bit_mask)) {
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/* Found an active (signalled) event */
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int_status |= acpi_ev_fixed_event_dispatch((u32) i);
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}
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}
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return (int_status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_fixed_event_dispatch
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*
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* PARAMETERS: Event - Event type
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Clears the status bit for the requested event, calls the
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* handler that previously registered for the event.
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*
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******************************************************************************/
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static u32 acpi_ev_fixed_event_dispatch(u32 event)
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{
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ACPI_FUNCTION_ENTRY();
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/* Clear the status bit */
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(void)acpi_set_register(acpi_gbl_fixed_event_info[event].
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status_register_id, 1, ACPI_MTX_DO_NOT_LOCK);
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/*
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* Make sure we've got a handler. If not, report an error.
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* The event is disabled to prevent further interrupts.
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*/
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if (NULL == acpi_gbl_fixed_event_handlers[event].handler) {
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(void)acpi_set_register(acpi_gbl_fixed_event_info[event].
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enable_register_id, 0,
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ACPI_MTX_DO_NOT_LOCK);
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ACPI_ERROR((AE_INFO,
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"No installed handler for fixed event [%08X]",
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event));
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return (ACPI_INTERRUPT_NOT_HANDLED);
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}
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/* Invoke the Fixed Event handler */
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return ((acpi_gbl_fixed_event_handlers[event].
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handler) (acpi_gbl_fixed_event_handlers[event].context));
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}
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