blob: a6eef85673a0f3019765d1e5d69bfe870be95c91 [file] [log] [blame]
/*
* Copyright (c) 2013-2015, Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief system module for variants with LOAPIC
*
*/
#include <misc/__assert.h>
#include "board.h"
#include <kernel.h>
#include <arch/cpu.h>
#include <drivers/ioapic.h>
#include <drivers/loapic.h>
#include <drivers/sysapic.h>
#include <irq.h>
#define IS_IOAPIC_IRQ(irq) (irq < LOAPIC_IRQ_BASE)
#define HARDWARE_IRQ_LIMIT ((LOAPIC_IRQ_BASE + LOAPIC_IRQ_COUNT) - 1)
/**
*
* @brief Program interrupt controller
*
* This routine programs the interrupt controller with the given vector
* based on the given IRQ parameter.
*
* Drivers call this routine instead of IRQ_CONNECT() when interrupts are
* configured statically.
*
* The Galileo board virtualizes IRQs as follows:
*
* - The first CONFIG_IOAPIC_NUM_RTES IRQs are provided by the IOAPIC so the
* IOAPIC is programmed for these IRQs
* - The remaining IRQs are provided by the LOAPIC and hence the LOAPIC is
* programmed.
*
* @param vector the vector number
* @param irq the virtualized IRQ
* @param flags interrupt flags
*
*/
void __irq_controller_irq_config(unsigned int vector, unsigned int irq,
u32_t flags)
{
__ASSERT(irq >= 0 && irq <= HARDWARE_IRQ_LIMIT, "invalid irq line");
if (IS_IOAPIC_IRQ(irq)) {
_ioapic_irq_set(irq, vector, flags);
} else {
_loapic_int_vec_set(irq - LOAPIC_IRQ_BASE, vector);
}
}
/**
*
* @brief Enable an individual interrupt (IRQ)
*
* The public interface for enabling/disabling a specific IRQ for the IA-32
* architecture is defined as follows in include/arch/x86/arch.h
*
* extern void irq_enable (unsigned int irq);
* extern void irq_disable (unsigned int irq);
*
* The irq_enable() routine is provided by the interrupt controller driver due
* to the IRQ virtualization that is performed by this platform. See the
* comments in _interrupt_vector_allocate() for more information regarding IRQ
* virtualization.
*
* @return N/A
*/
void _arch_irq_enable(unsigned int irq)
{
if (IS_IOAPIC_IRQ(irq)) {
_ioapic_irq_enable(irq);
} else {
_loapic_irq_enable(irq - LOAPIC_IRQ_BASE);
}
}
/**
*
* @brief Disable an individual interrupt (IRQ)
*
* The irq_disable() routine is provided by the interrupt controller driver due
* to the IRQ virtualization that is performed by this platform. See the
* comments in _interrupt_vector_allocate() for more information regarding IRQ
* virtualization.
*
* @return N/A
*/
void _arch_irq_disable(unsigned int irq)
{
if (IS_IOAPIC_IRQ(irq)) {
_ioapic_irq_disable(irq);
} else {
_loapic_irq_disable(irq - LOAPIC_IRQ_BASE);
}
}