105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/*
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* Copyright (c) 2010-2014 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 Interrupt support for IA-32 arch
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*
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* INTERNAL
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* The _idt_base_address symbol is used to determine the base address of the IDT.
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* (It is generated by the linker script, and doesn't correspond to an actual
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* global variable.)
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*/
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#include <kernel.h>
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#include <arch/cpu.h>
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#include <kernel_structs.h>
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#include <misc/__assert.h>
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#include <misc/printk.h>
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#include <irq.h>
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#include <logging/kernel_event_logger.h>
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#include <kswap.h>
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extern void _SpuriousIntHandler(void *);
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extern void _SpuriousIntNoErrCodeHandler(void *);
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/*
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* Place the addresses of the spurious interrupt handlers into the intList
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* section. The genIdt tool can then populate any unused vectors with
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* these routines.
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*/
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void *__attribute__((section(".spurIsr"))) MK_ISR_NAME(_SpuriousIntHandler) =
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&_SpuriousIntHandler;
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void *__attribute__((section(".spurNoErrIsr")))
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MK_ISR_NAME(_SpuriousIntNoErrCodeHandler) =
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&_SpuriousIntNoErrCodeHandler;
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/* FIXME: IRQ direct inline functions have to be placed here and not in
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* arch/cpu.h as inline functions due to nasty circular dependency between
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* arch/cpu.h and kernel_structs.h; the inline functions typically need to
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* perform operations on _kernel. For now, leave as regular functions, a
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* future iteration will resolve this.
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* We have a similar issue with the k_event_logger functions.
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*
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* See https://jira.zephyrproject.org/browse/ZEP-1595
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*/
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#ifdef CONFIG_SYS_POWER_MANAGEMENT
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void _arch_irq_direct_pm(void)
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{
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if (_kernel.idle) {
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s32_t idle_val = _kernel.idle;
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_kernel.idle = 0;
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_sys_power_save_idle_exit(idle_val);
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}
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}
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#endif
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void _arch_isr_direct_header(void)
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{
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_int_latency_start();
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_sys_k_event_logger_interrupt();
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_sys_k_event_logger_exit_sleep();
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/* We're not going to unlock IRQs, but we still need to increment this
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* so that _is_in_isr() works
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*/
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++_kernel.nested;
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}
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void _arch_isr_direct_footer(int swap)
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{
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_irq_controller_eoi();
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_int_latency_stop();
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--_kernel.nested;
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/* Call swap if all the following is true:
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*
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* 1) swap argument was enabled to this function
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* 2) We are not in a nested interrupt
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* 3) Current thread is preemptible
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* 4) Next thread to run in the ready queue is not this thread
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*/
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if (swap && !_kernel.nested &&
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_current->base.preempt < _NON_PREEMPT_THRESHOLD &&
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_kernel.ready_q.cache != _current) {
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unsigned int flags;
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/* Fetch EFLAGS argument to _Swap() */
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__asm__ volatile (
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"pushfl\n\t"
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"popl %0\n\t"
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: "=g" (flags)
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:
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: "memory"
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);
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_Swap(flags);
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}
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}
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