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//-----------------------------------------------------------------------------
// *! (C) Copyright International Business Machines Corp. 2015
// *! All Rights Reserved -- Property of IBM
// *! *** IBM Confidential ***
//-----------------------------------------------------------------------------
/// \file gpe_irq_init.c
/// \brief OCCHW IRQ initialization code for PK
///
/// The entry points in this file are initialization rotines that could be
/// eliminated/deallocated by the application to free up storage if they are
/// no longer needed after initialization.
#include "pk.h"
/// Define the polarity and trigger condition for an interrupt.
///
/// It is up to the application to take care of any side effects that may
/// occur from programming or reprogramming the interrupt controller. For
/// example, changing edge/level sensitivity or active level may set or clear
/// interrupt status in the controller.
///
/// Note that PK allows this API to be called from any context, and changes
/// to the interrupt controller are made from a critical section.
///
/// Return values other then PK_OK (0) are errors; see \ref pk_errors
///
/// \retval 0 Successful completion
///
/// \retval -PK_INVALID_ARGUMENT_IRQ_SETUP One or more arguments are invalid,
/// including an invalid \a irq, or invalid \a polarity or \a trigger parameters.
int
pk_irq_setup(PkIrqId irq,
int polarity,
int trigger)
{
PkMachineContext ctx;
if (PK_ERROR_CHECK_API) {
PK_ERROR_IF(!OCCHW_IRQ_VALID(irq) ||
!OCCHW_IRQ_OWNED(irq) ||
!((polarity == PK_IRQ_POLARITY_ACTIVE_HIGH) ||
(polarity == PK_IRQ_POLARITY_ACTIVE_LOW)) ||
!((trigger == PK_IRQ_TRIGGER_LEVEL_SENSITIVE) ||
(trigger == PK_IRQ_TRIGGER_EDGE_SENSITIVE)),
PK_INVALID_ARGUMENT_IRQ_SETUP);
}
pk_critical_section_enter(&ctx);
if (polarity == PK_IRQ_POLARITY_ACTIVE_HIGH) {
out32(OCCHW_OIEPR_OR(irq), OCCHW_IRQ_MASK32(irq));
} else {
out32(OCCHW_OIEPR_CLR(irq), OCCHW_IRQ_MASK32(irq));
}
if (trigger == PK_IRQ_TRIGGER_EDGE_SENSITIVE) {
out32(OCCHW_OITR_OR(irq), OCCHW_IRQ_MASK32(irq));
} else {
out32(OCCHW_OITR_CLR(irq), OCCHW_IRQ_MASK32(irq));
}
pk_critical_section_exit(&ctx);
return PK_OK;
}
/// (Re)define the IRQ handler and priority for an interrupt.
/// Return values other then PK_OK (0) are errors; see \ref pk_errors
///
/// Note that PK allows this API to be called from any context, and changes
/// to the interrupt controller are made from a critical section.
///
/// \retval 0 Successful completion
///
/// \retval -PK_INVALID_ARGUMENT_IRQ_HANDLER One or more arguments are
/// invalid, including an invalid \a irq, a null (0) \a handler,
/// or invalid \a priority.
int
pk_irq_handler_set(PkIrqId irq,
PkIrqHandler handler,
void *arg)
{
PkMachineContext ctx;
if (PK_ERROR_CHECK_API) {
PK_ERROR_IF(!OCCHW_IRQ_VALID(irq) ||
(handler == 0),
PK_INVALID_ARGUMENT_IRQ_HANDLER);
}
pk_critical_section_enter(&ctx);
__ppe42_irq_handlers[irq].handler = handler;
__ppe42_irq_handlers[irq].arg = arg;
pk_critical_section_exit(&ctx);
return PK_OK;
}
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