251 lines
7.7 KiB
C
251 lines
7.7 KiB
C
/*******************************************************************************
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*
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* Module Name: evsci - System Control Interrupt configuration and
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* legacy to ACPI mode state transition functions
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2016, Intel Corp.
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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 "accommon.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evsci")
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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/* Local prototypes */
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static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_sci_dispatch
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*
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* PARAMETERS: None
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*
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* RETURN: Status code indicates whether interrupt was handled.
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*
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* DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers.
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*
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******************************************************************************/
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u32 acpi_ev_sci_dispatch(void)
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{
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struct acpi_sci_handler_info *sci_handler;
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acpi_cpu_flags flags;
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u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
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ACPI_FUNCTION_NAME(ev_sci_dispatch);
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/* Are there any host-installed SCI handlers? */
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if (!acpi_gbl_sci_handler_list) {
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return (int_status);
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}
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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/* Invoke all host-installed SCI handlers */
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sci_handler = acpi_gbl_sci_handler_list;
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while (sci_handler) {
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/* Invoke the installed handler (at interrupt level) */
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int_status |= sci_handler->address(sci_handler->context);
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sci_handler = sci_handler->next;
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}
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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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_sci_xrupt_handler
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*
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* PARAMETERS: context - Calling Context
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*
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* RETURN: Status code indicates whether interrupt was handled.
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*
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* DESCRIPTION: Interrupt handler that will figure out what function or
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* control method to call to deal with a SCI.
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*
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******************************************************************************/
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static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context)
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{
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struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
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u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
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ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler);
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/*
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* We are guaranteed by the ACPICA initialization/shutdown code that
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* if this interrupt handler is installed, ACPI is enabled.
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*/
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/*
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* Fixed Events:
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* Check for and dispatch any Fixed Events that have occurred
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*/
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interrupt_handled |= acpi_ev_fixed_event_detect();
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/*
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* General Purpose Events:
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* Check for and dispatch any GPEs that have occurred
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*/
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interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
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/* Invoke all host-installed SCI handlers */
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interrupt_handled |= acpi_ev_sci_dispatch();
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acpi_sci_count++;
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return_UINT32(interrupt_handled);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_gpe_xrupt_handler
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*
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* PARAMETERS: context - Calling Context
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*
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* RETURN: Status code indicates whether interrupt was handled.
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*
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* DESCRIPTION: Handler for GPE Block Device interrupts
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*
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******************************************************************************/
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u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context)
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{
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struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
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u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
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ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler);
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/*
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* We are guaranteed by the ACPICA initialization/shutdown code that
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* if this interrupt handler is installed, ACPI is enabled.
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*/
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/* GPEs: Check for and dispatch any GPEs that have occurred */
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interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
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return_UINT32(interrupt_handled);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_ev_install_sci_handler
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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: Installs SCI handler.
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*
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******************************************************************************/
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u32 acpi_ev_install_sci_handler(void)
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{
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u32 status = AE_OK;
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ACPI_FUNCTION_TRACE(ev_install_sci_handler);
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status =
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acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
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acpi_ev_sci_xrupt_handler,
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acpi_gbl_gpe_xrupt_list_head);
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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_remove_all_sci_handlers
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*
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* PARAMETERS: none
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*
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* RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not
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* installed to begin with
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*
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* DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
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* taken. Remove all host-installed SCI handlers.
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*
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* Note: It doesn't seem important to disable all events or set the event
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* enable registers to their original values. The OS should disable
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* the SCI interrupt level when the handler is removed, so no more
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* events will come in.
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*
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******************************************************************************/
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acpi_status acpi_ev_remove_all_sci_handlers(void)
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{
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struct acpi_sci_handler_info *sci_handler;
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acpi_cpu_flags flags;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ev_remove_all_sci_handlers);
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/* Just let the OS remove the handler and disable the level */
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status =
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acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
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acpi_ev_sci_xrupt_handler);
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if (!acpi_gbl_sci_handler_list) {
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return (status);
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}
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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/* Free all host-installed SCI handlers */
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while (acpi_gbl_sci_handler_list) {
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sci_handler = acpi_gbl_sci_handler_list;
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acpi_gbl_sci_handler_list = sci_handler->next;
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ACPI_FREE(sci_handler);
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}
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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return_ACPI_STATUS(status);
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}
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#endif /* !ACPI_REDUCED_HARDWARE */
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