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/*
* Copyright (c) 2013-2015, Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief system module for variants with LOAPIC
*
*/
#include <zephyr/sys/__assert.h>
#include <zephyr/kernel.h>
#include <zephyr/arch/cpu.h>
#include <zephyr/drivers/interrupt_controller/ioapic.h>
#include <zephyr/drivers/interrupt_controller/loapic.h>
#include <zephyr/drivers/interrupt_controller/sysapic.h>
#include <zephyr/irq.h>
#include <zephyr/linker/sections.h>
#define IS_IOAPIC_IRQ(irq) (irq < z_loapic_irq_base())
#define HARDWARE_IRQ_LIMIT ((z_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 z_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
*/
__boot_func
void z_irq_controller_irq_config(unsigned int vector, unsigned int irq,
uint32_t flags)
{
__ASSERT(irq <= HARDWARE_IRQ_LIMIT, "invalid irq line");
if (IS_IOAPIC_IRQ(irq)) {
z_ioapic_irq_set(irq, vector, flags);
} else {
z_loapic_int_vec_set(irq - z_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.
*/
__pinned_func
void arch_irq_enable(unsigned int irq)
{
if (IS_IOAPIC_IRQ(irq)) {
z_ioapic_irq_enable(irq);
} else {
z_loapic_irq_enable(irq - z_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.
*/
__pinned_func
void arch_irq_disable(unsigned int irq)
{
if (IS_IOAPIC_IRQ(irq)) {
z_ioapic_irq_disable(irq);
} else {
z_loapic_irq_disable(irq - z_loapic_irq_base());
}
}