99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
/*
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* Copyright (c) 2013-2015, Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief system module for variants with LOAPIC
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*
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*/
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#include <sys/__assert.h>
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#include <kernel.h>
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#include <arch/cpu.h>
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#include <drivers/interrupt_controller/ioapic.h>
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#include <drivers/interrupt_controller/loapic.h>
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#include <drivers/interrupt_controller/sysapic.h>
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#include <irq.h>
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#include <linker/sections.h>
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#define IS_IOAPIC_IRQ(irq) (irq < z_loapic_irq_base())
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#define HARDWARE_IRQ_LIMIT ((z_loapic_irq_base() + LOAPIC_IRQ_COUNT) - 1)
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/**
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* @brief Program interrupt controller
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*
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* This routine programs the interrupt controller with the given vector
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* based on the given IRQ parameter.
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*
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* Drivers call this routine instead of IRQ_CONNECT() when interrupts are
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* configured statically.
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*
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* The Galileo board virtualizes IRQs as follows:
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*
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* - The first z_ioapic_num_rtes() IRQs are provided by the IOAPIC so the
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* IOAPIC is programmed for these IRQs
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* - The remaining IRQs are provided by the LOAPIC and hence the LOAPIC is
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* programmed.
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*
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* @param vector the vector number
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* @param irq the virtualized IRQ
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* @param flags interrupt flags
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*/
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__boot_func
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void z_irq_controller_irq_config(unsigned int vector, unsigned int irq,
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uint32_t flags)
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{
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__ASSERT(irq <= HARDWARE_IRQ_LIMIT, "invalid irq line");
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if (IS_IOAPIC_IRQ(irq)) {
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z_ioapic_irq_set(irq, vector, flags);
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} else {
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z_loapic_int_vec_set(irq - z_loapic_irq_base(), vector);
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}
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}
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/**
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* @brief Enable an individual interrupt (IRQ)
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*
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* The public interface for enabling/disabling a specific IRQ for the IA-32
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* architecture is defined as follows in include/arch/x86/arch.h
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*
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* extern void irq_enable (unsigned int irq);
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* extern void irq_disable (unsigned int irq);
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*
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* The irq_enable() routine is provided by the interrupt controller driver due
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* to the IRQ virtualization that is performed by this platform. See the
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* comments in _interrupt_vector_allocate() for more information regarding IRQ
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* virtualization.
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*/
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__pinned_func
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void arch_irq_enable(unsigned int irq)
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{
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if (IS_IOAPIC_IRQ(irq)) {
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z_ioapic_irq_enable(irq);
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} else {
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z_loapic_irq_enable(irq - z_loapic_irq_base());
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}
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}
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/**
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* @brief Disable an individual interrupt (IRQ)
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*
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* The irq_disable() routine is provided by the interrupt controller driver due
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* to the IRQ virtualization that is performed by this platform. See the
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* comments in _interrupt_vector_allocate() for more information regarding IRQ
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* virtualization.
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*/
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__pinned_func
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void arch_irq_disable(unsigned int irq)
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{
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if (IS_IOAPIC_IRQ(irq)) {
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z_ioapic_irq_disable(irq);
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} else {
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z_loapic_irq_disable(irq - z_loapic_irq_base());
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}
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}
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