kernel-ark/drivers/acpi/events/evevent.c
Bob Moore b8e4d89357 [ACPI] ACPICA 20060127
Implemented support in the Resource Manager to allow
unresolved namestring references within resource package
objects for the _PRT method. This support is in addition
to the previously implemented unresolved reference
support within the AML parser. If the interpreter slack
mode is enabled (true on Linux unless acpi=strict),
these unresolved references will be passed through
to the caller as a NULL package entry.
http://bugzilla.kernel.org/show_bug.cgi?id=5741

Implemented and deployed new macros and functions for
error and warning messages across the subsystem. These
macros are simpler and generate less code than their
predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_*
macros.

Implemented the acpi_cpu_flags type to simplify host OS
integration of the Acquire/Release Lock OSL interfaces.
Suggested by Steven Rostedt and Andrew Morton.

Fixed a problem where Alias ASL operators are sometimes
not correctly resolved. causing AE_AML_INTERNAL
http://bugzilla.kernel.org/show_bug.cgi?id=5189
http://bugzilla.kernel.org/show_bug.cgi?id=5674

Fixed several problems with the implementation of the
ConcatenateResTemplate ASL operator. As per the ACPI
specification, zero length buffers are now treated as a
single EndTag. One-length buffers always cause a fatal
exception. Non-zero length buffers that do not end with
a full 2-byte EndTag cause a fatal exception.

Fixed a possible structure overwrite in the
AcpiGetObjectInfo external interface. (With assistance
from Thomas Renninger)

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-01-31 03:25:09 -05:00

322 lines
9.3 KiB
C

/******************************************************************************
*
* Module Name: evevent - Fixed Event handling and dispatch
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/acevents.h>
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME("evevent")
/* Local prototypes */
static acpi_status acpi_ev_fixed_event_initialize(void);
static u32 acpi_ev_fixed_event_dispatch(u32 event);
/*******************************************************************************
*
* FUNCTION: acpi_ev_initialize_events
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
*
******************************************************************************/
acpi_status acpi_ev_initialize_events(void)
{
acpi_status status;
ACPI_FUNCTION_TRACE("ev_initialize_events");
/* Make sure we have ACPI tables */
if (!acpi_gbl_DSDT) {
ACPI_WARNING((AE_INFO, "No ACPI tables present!"));
return_ACPI_STATUS(AE_NO_ACPI_TABLES);
}
/*
* Initialize the Fixed and General Purpose Events. This is done prior to
* enabling SCIs to prevent interrupts from occurring before the handlers are
* installed.
*/
status = acpi_ev_fixed_event_initialize();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Unable to initialize fixed events"));
return_ACPI_STATUS(status);
}
status = acpi_ev_gpe_initialize();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Unable to initialize general purpose events"));
return_ACPI_STATUS(status);
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_install_fadt_gpes
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Completes initialization of the FADT-defined GPE blocks
* (0 and 1). This causes the _PRW methods to be run, so the HW
* must be fully initialized at this point, including global lock
* support.
*
******************************************************************************/
acpi_status acpi_ev_install_fadt_gpes(void)
{
acpi_status status;
ACPI_FUNCTION_TRACE("ev_install_fadt_gpes");
/* Namespace must be locked */
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return (status);
}
/* FADT GPE Block 0 */
(void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
acpi_gbl_gpe_fadt_blocks[0]);
/* FADT GPE Block 1 */
(void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
acpi_gbl_gpe_fadt_blocks[1]);
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_install_xrupt_handlers
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
*
******************************************************************************/
acpi_status acpi_ev_install_xrupt_handlers(void)
{
acpi_status status;
ACPI_FUNCTION_TRACE("ev_install_xrupt_handlers");
/* Install the SCI handler */
status = acpi_ev_install_sci_handler();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Unable to install System Control Interrupt handler"));
return_ACPI_STATUS(status);
}
/* Install the handler for the Global Lock */
status = acpi_ev_init_global_lock_handler();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Unable to initialize Global Lock handler"));
return_ACPI_STATUS(status);
}
acpi_gbl_events_initialized = TRUE;
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_fixed_event_initialize
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Install the fixed event handlers and enable the fixed events.
*
******************************************************************************/
static acpi_status acpi_ev_fixed_event_initialize(void)
{
acpi_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++) {
acpi_gbl_fixed_event_handlers[i].handler = NULL;
acpi_gbl_fixed_event_handlers[i].context = NULL;
/* Enable the fixed event */
if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
status =
acpi_set_register(acpi_gbl_fixed_event_info[i].
enable_register_id, 0,
ACPI_MTX_LOCK);
if (ACPI_FAILURE(status)) {
return (status);
}
}
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_fixed_event_detect
*
* PARAMETERS: None
*
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
*
* DESCRIPTION: Checks the PM status register for active fixed events
*
******************************************************************************/
u32 acpi_ev_fixed_event_detect(void)
{
u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
u32 fixed_status;
u32 fixed_enable;
acpi_native_uint i;
ACPI_FUNCTION_NAME("ev_fixed_event_detect");
/*
* Read the fixed feature status and enable registers, as all the cases
* depend on their values. Ignore errors here.
*/
(void)acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1_STATUS, &fixed_status);
(void)acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
"Fixed Event Block: Enable %08X Status %08X\n",
fixed_enable, fixed_status));
/*
* 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 ((fixed_status & acpi_gbl_fixed_event_info[i].
status_bit_mask)
&& (fixed_enable & acpi_gbl_fixed_event_info[i].
enable_bit_mask)) {
/* Found an active (signalled) event */
int_status |= acpi_ev_fixed_event_dispatch((u32) i);
}
}
return (int_status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_fixed_event_dispatch
*
* 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.
*
******************************************************************************/
static u32 acpi_ev_fixed_event_dispatch(u32 event)
{
ACPI_FUNCTION_ENTRY();
/* Clear the status bit */
(void)acpi_set_register(acpi_gbl_fixed_event_info[event].
status_register_id, 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 == acpi_gbl_fixed_event_handlers[event].handler) {
(void)acpi_set_register(acpi_gbl_fixed_event_info[event].
enable_register_id, 0,
ACPI_MTX_DO_NOT_LOCK);
ACPI_ERROR((AE_INFO,
"No installed handler for fixed event [%08X]",
event));
return (ACPI_INTERRUPT_NOT_HANDLED);
}
/* Invoke the Fixed Event handler */
return ((acpi_gbl_fixed_event_handlers[event].
handler) (acpi_gbl_fixed_event_handlers[event].context));
}