![Bob Moore](/assets/img/avatar_default.png)
Add ACPI_REDUCED_HARDWARE flag that removes all hardware-related code (about 10% code, 5% static data). Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
296 lines
8.6 KiB
C
296 lines
8.6 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: evevent - Fixed Event handling and dispatch
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2012, Intel Corp.
|
|
* 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 "accommon.h"
|
|
#include "acevents.h"
|
|
|
|
#define _COMPONENT ACPI_EVENTS
|
|
ACPI_MODULE_NAME("evevent")
|
|
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
|
|
/* 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);
|
|
|
|
/* If Hardware Reduced flag is set, there are no fixed events */
|
|
|
|
if (acpi_gbl_reduced_hardware) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*
|
|
* 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_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);
|
|
|
|
/* If Hardware Reduced flag is set, there is no ACPI h/w */
|
|
|
|
if (acpi_gbl_reduced_hardware) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* 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 disable all fixed events.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status acpi_ev_fixed_event_initialize(void)
|
|
{
|
|
u32 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;
|
|
|
|
/* Disable the fixed event */
|
|
|
|
if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
|
|
status =
|
|
acpi_write_bit_register(acpi_gbl_fixed_event_info
|
|
[i].enable_register_id,
|
|
ACPI_DISABLE_EVENT);
|
|
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;
|
|
u32 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_REGISTER_PM1_STATUS, &fixed_status);
|
|
(void)acpi_hw_register_read(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. Invoke global event
|
|
* handler if present.
|
|
*/
|
|
acpi_fixed_event_count[i]++;
|
|
if (acpi_gbl_global_event_handler) {
|
|
acpi_gbl_global_event_handler
|
|
(ACPI_EVENT_TYPE_FIXED, NULL, i,
|
|
acpi_gbl_global_event_handler_context);
|
|
}
|
|
|
|
int_status |= acpi_ev_fixed_event_dispatch(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_write_bit_register(acpi_gbl_fixed_event_info[event].
|
|
status_register_id, ACPI_CLEAR_STATUS);
|
|
|
|
/*
|
|
* 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_write_bit_register(acpi_gbl_fixed_event_info[event].
|
|
enable_register_id,
|
|
ACPI_DISABLE_EVENT);
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
"No installed handler for fixed event [0x%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));
|
|
}
|
|
|
|
#endif /* !ACPI_REDUCED_HARDWARE */
|