0,0 → 1,250 |
/******************************************************************************* |
* |
* Module Name: evsci - System Control Interrupt configuration and |
* legacy to ACPI mode state transition functions |
* |
******************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, 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("evsci") |
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
/* Local prototypes */ |
static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context); |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ev_sci_dispatch |
* |
* PARAMETERS: None |
* |
* RETURN: Status code indicates whether interrupt was handled. |
* |
* DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers. |
* |
******************************************************************************/ |
|
u32 acpi_ev_sci_dispatch(void) |
{ |
struct acpi_sci_handler_info *sci_handler; |
acpi_cpu_flags flags; |
u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
|
ACPI_FUNCTION_NAME(ev_sci_dispatch); |
|
/* Are there any host-installed SCI handlers? */ |
|
if (!acpi_gbl_sci_handler_list) { |
return (int_status); |
} |
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
|
/* Invoke all host-installed SCI handlers */ |
|
sci_handler = acpi_gbl_sci_handler_list; |
while (sci_handler) { |
|
/* Invoke the installed handler (at interrupt level) */ |
|
int_status |= sci_handler->address(sci_handler->context); |
|
sci_handler = sci_handler->next; |
} |
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
return (int_status); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ev_sci_xrupt_handler |
* |
* PARAMETERS: context - Calling Context |
* |
* RETURN: Status code indicates whether interrupt was handled. |
* |
* DESCRIPTION: Interrupt handler that will figure out what function or |
* control method to call to deal with a SCI. |
* |
******************************************************************************/ |
|
static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context) |
{ |
struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; |
u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; |
|
ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler); |
|
/* |
* We are guaranteed by the ACPICA initialization/shutdown code that |
* if this interrupt handler is installed, ACPI is enabled. |
*/ |
|
/* |
* Fixed Events: |
* Check for and dispatch any Fixed Events that have occurred |
*/ |
interrupt_handled |= acpi_ev_fixed_event_detect(); |
|
/* |
* General Purpose Events: |
* Check for and dispatch any GPEs that have occurred |
*/ |
interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); |
|
/* Invoke all host-installed SCI handlers */ |
|
interrupt_handled |= acpi_ev_sci_dispatch(); |
|
acpi_sci_count++; |
return_UINT32(interrupt_handled); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ev_gpe_xrupt_handler |
* |
* PARAMETERS: context - Calling Context |
* |
* RETURN: Status code indicates whether interrupt was handled. |
* |
* DESCRIPTION: Handler for GPE Block Device interrupts |
* |
******************************************************************************/ |
|
u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context) |
{ |
struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; |
u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; |
|
ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler); |
|
/* |
* We are guaranteed by the ACPICA initialization/shutdown code that |
* if this interrupt handler is installed, ACPI is enabled. |
*/ |
|
/* GPEs: Check for and dispatch any GPEs that have occurred */ |
|
interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); |
return_UINT32(interrupt_handled); |
} |
|
/****************************************************************************** |
* |
* FUNCTION: acpi_ev_install_sci_handler |
* |
* PARAMETERS: none |
* |
* RETURN: Status |
* |
* DESCRIPTION: Installs SCI handler. |
* |
******************************************************************************/ |
|
u32 acpi_ev_install_sci_handler(void) |
{ |
u32 status = AE_OK; |
|
ACPI_FUNCTION_TRACE(ev_install_sci_handler); |
|
status = |
acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, |
acpi_ev_sci_xrupt_handler, |
acpi_gbl_gpe_xrupt_list_head); |
return_ACPI_STATUS(status); |
} |
|
/****************************************************************************** |
* |
* FUNCTION: acpi_ev_remove_all_sci_handlers |
* |
* PARAMETERS: none |
* |
* RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not |
* installed to begin with |
* |
* DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be |
* taken. Remove all host-installed SCI handlers. |
* |
* Note: It doesn't seem important to disable all events or set the event |
* enable registers to their original values. The OS should disable |
* the SCI interrupt level when the handler is removed, so no more |
* events will come in. |
* |
******************************************************************************/ |
|
acpi_status acpi_ev_remove_all_sci_handlers(void) |
{ |
struct acpi_sci_handler_info *sci_handler; |
acpi_cpu_flags flags; |
acpi_status status; |
|
ACPI_FUNCTION_TRACE(ev_remove_all_sci_handlers); |
|
/* Just let the OS remove the handler and disable the level */ |
|
status = |
acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, |
acpi_ev_sci_xrupt_handler); |
|
if (!acpi_gbl_sci_handler_list) { |
return (status); |
} |
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
|
/* Free all host-installed SCI handlers */ |
|
while (acpi_gbl_sci_handler_list) { |
sci_handler = acpi_gbl_sci_handler_list; |
acpi_gbl_sci_handler_list = sci_handler->next; |
ACPI_FREE(sci_handler); |
} |
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
return_ACPI_STATUS(status); |
} |
|
#endif /* !ACPI_REDUCED_HARDWARE */ |