/* 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 *
******************************************************************************/
/* 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);
}
/* * Initialize the structure that keeps track of fixed event handlers and * disable all of 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 *
******************************************************************************/
/* * Read the fixed feature status and enable registers, as all the cases * depend on their values. Ignore errors here.
*/
status = acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status);
status |=
acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable); if (ACPI_FAILURE(status)) { return (int_status);
}
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);
}
/******************************************************************************* * * 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. * NOTE: If there is no handler for the event, the event is * disabled to prevent further interrupts. *
******************************************************************************/
/* * Make sure that a handler exists. If not, report an error * and disable the event to prevent further interrupts.
*/ if (!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 - %s (%u), disabling",
acpi_ut_get_event_name(event), event));
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