mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-03 02:01:56 +00:00
3d3d6a85df
None of this is currently necessary, the spurious interrupt stubs and exception entry code is included in the binary just fine. To make matters worse, some data referenced lives in the .intList section which is completely stripped out of the binary. If in the future we find certain essential functions are being garbage collected when they should not be, the proper way to mitigate this is with KEEP() directives in the linker script. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 2010-2014 Wind River Systems, Inc.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Interrupt support for IA-32 arch
|
|
*
|
|
* INTERNAL
|
|
* The _idt_base_address symbol is used to determine the base address of the IDT.
|
|
* (It is generated by the linker script, and doesn't correspond to an actual
|
|
* global variable.)
|
|
*/
|
|
|
|
#include <kernel.h>
|
|
#include <arch/cpu.h>
|
|
#include <kernel_structs.h>
|
|
#include <misc/__assert.h>
|
|
#include <misc/printk.h>
|
|
#include <irq.h>
|
|
#include <logging/kernel_event_logger.h>
|
|
|
|
extern void _SpuriousIntHandler(void *);
|
|
extern void _SpuriousIntNoErrCodeHandler(void *);
|
|
|
|
/*
|
|
* Place the addresses of the spurious interrupt handlers into the intList
|
|
* section. The genIdt tool can then populate any unused vectors with
|
|
* these routines.
|
|
*/
|
|
void *__attribute__((section(".spurIsr"))) MK_ISR_NAME(_SpuriousIntHandler) =
|
|
&_SpuriousIntHandler;
|
|
void *__attribute__((section(".spurNoErrIsr")))
|
|
MK_ISR_NAME(_SpuriousIntNoErrCodeHandler) =
|
|
&_SpuriousIntNoErrCodeHandler;
|
|
|
|
|
|
/* FIXME: IRQ direct inline functions have to be placed here and not in
|
|
* arch/cpu.h as inline functions due to nasty circular dependency between
|
|
* arch/cpu.h and kernel_structs.h; the inline functions typically need to
|
|
* perform operations on _kernel. For now, leave as regular functions, a
|
|
* future iteration will resolve this.
|
|
* We have a similar issue with the k_event_logger functions.
|
|
*
|
|
* See https://jira.zephyrproject.org/browse/ZEP-1595
|
|
*/
|
|
|
|
#ifdef CONFIG_SYS_POWER_MANAGEMENT
|
|
void _arch_irq_direct_pm(void)
|
|
{
|
|
if (_kernel.idle) {
|
|
s32_t idle_val = _kernel.idle;
|
|
|
|
_kernel.idle = 0;
|
|
_sys_power_save_idle_exit(idle_val);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void _arch_isr_direct_header(void)
|
|
{
|
|
_int_latency_start();
|
|
_sys_k_event_logger_interrupt();
|
|
_sys_k_event_logger_exit_sleep();
|
|
|
|
/* We're not going to unlock IRQs, but we still need to increment this
|
|
* so that _is_in_isr() works
|
|
*/
|
|
++_kernel.nested;
|
|
}
|
|
|
|
void _arch_isr_direct_footer(int swap)
|
|
{
|
|
_irq_controller_eoi();
|
|
_int_latency_stop();
|
|
--_kernel.nested;
|
|
|
|
/* Call swap if all the following is true:
|
|
*
|
|
* 1) swap argument was enabled to this function
|
|
* 2) We are not in a nested interrupt
|
|
* 3) Current thread is preemptible
|
|
* 4) Next thread to run in the ready queue is not this thread
|
|
*/
|
|
if (swap && !_kernel.nested &&
|
|
_current->base.preempt < _NON_PREEMPT_THRESHOLD &&
|
|
_kernel.ready_q.cache != _current) {
|
|
unsigned int flags;
|
|
|
|
/* Fetch EFLAGS argument to _Swap() */
|
|
__asm__ volatile (
|
|
"pushfl\n\t"
|
|
"popl %0\n\t"
|
|
: "=g" (flags)
|
|
:
|
|
: "memory"
|
|
);
|
|
_Swap(flags);
|
|
}
|
|
}
|
|
|