1 /*******************************************************************************
3 * Module Name: evsci - System Control Interrupt configuration and
4 * legacy to ACPI mode state transition functions
6 ******************************************************************************/
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45 #include <contrib/dev/acpica/include/acpi.h>
46 #include <contrib/dev/acpica/include/accommon.h>
47 #include <contrib/dev/acpica/include/acevents.h>
50 #define _COMPONENT ACPI_EVENTS
51 ACPI_MODULE_NAME ("evsci")
53 /* Local prototypes */
55 static UINT32 ACPI_SYSTEM_XFACE
56 AcpiEvSciXruptHandler (
60 /*******************************************************************************
62 * FUNCTION: AcpiEvSciXruptHandler
64 * PARAMETERS: Context - Calling Context
66 * RETURN: Status code indicates whether interrupt was handled.
68 * DESCRIPTION: Interrupt handler that will figure out what function or
69 * control method to call to deal with a SCI.
71 ******************************************************************************/
73 static UINT32 ACPI_SYSTEM_XFACE
74 AcpiEvSciXruptHandler (
77 ACPI_GPE_XRUPT_INFO *GpeXruptList = Context;
78 UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED;
81 ACPI_FUNCTION_TRACE (EvSciXruptHandler);
85 * We are guaranteed by the ACPI CA initialization/shutdown code that
86 * if this interrupt handler is installed, ACPI is enabled.
91 * Check for and dispatch any Fixed Events that have occurred
93 InterruptHandled |= AcpiEvFixedEventDetect ();
96 * General Purpose Events:
97 * Check for and dispatch any GPEs that have occurred
99 InterruptHandled |= AcpiEvGpeDetect (GpeXruptList);
102 return_UINT32 (InterruptHandled);
106 /*******************************************************************************
108 * FUNCTION: AcpiEvGpeXruptHandler
110 * PARAMETERS: Context - Calling Context
112 * RETURN: Status code indicates whether interrupt was handled.
114 * DESCRIPTION: Handler for GPE Block Device interrupts
116 ******************************************************************************/
118 UINT32 ACPI_SYSTEM_XFACE
119 AcpiEvGpeXruptHandler (
122 ACPI_GPE_XRUPT_INFO *GpeXruptList = Context;
123 UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED;
126 ACPI_FUNCTION_TRACE (EvGpeXruptHandler);
130 * We are guaranteed by the ACPI CA initialization/shutdown code that
131 * if this interrupt handler is installed, ACPI is enabled.
134 /* GPEs: Check for and dispatch any GPEs that have occurred */
136 InterruptHandled |= AcpiEvGpeDetect (GpeXruptList);
138 return_UINT32 (InterruptHandled);
142 /******************************************************************************
144 * FUNCTION: AcpiEvInstallSciHandler
150 * DESCRIPTION: Installs SCI handler.
152 ******************************************************************************/
155 AcpiEvInstallSciHandler (
158 UINT32 Status = AE_OK;
161 ACPI_FUNCTION_TRACE (EvInstallSciHandler);
164 Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt,
165 AcpiEvSciXruptHandler, AcpiGbl_GpeXruptListHead);
166 return_ACPI_STATUS (Status);
170 /******************************************************************************
172 * FUNCTION: AcpiEvRemoveSciHandler
176 * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not
177 * installed to begin with
179 * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
182 * Note: It doesn't seem important to disable all events or set the event
183 * enable registers to their original values. The OS should disable
184 * the SCI interrupt level when the handler is removed, so no more
185 * events will come in.
187 ******************************************************************************/
190 AcpiEvRemoveSciHandler (
196 ACPI_FUNCTION_TRACE (EvRemoveSciHandler);
199 /* Just let the OS remove the handler and disable the level */
201 Status = AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt,
202 AcpiEvSciXruptHandler);
204 return_ACPI_STATUS (Status);