M7350/bootable/bootloader/lk/platform/armemu/interrupts.c
2024-09-09 08:52:07 +00:00

118 lines
3.1 KiB
C

/*
* Copyright (c) 2008 Travis Geiselbrecht
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <err.h>
#include <sys/types.h>
#include <debug.h>
#include <reg.h>
#include <kernel/thread.h>
#include <platform/interrupts.h>
#include <platform/armemu.h>
#include <arch/ops.h>
#include <arch/arm.h>
#include "platform_p.h"
struct int_handler_struct {
int_handler handler;
void *arg;
};
static struct int_handler_struct int_handler_table[PIC_MAX_INT];
void platform_init_interrupts(void)
{
// mask all the interrupts
*REG32(PIC_MASK_LATCH) = 0xffffffff;
}
status_t mask_interrupt(unsigned int vector)
{
if (vector >= PIC_MAX_INT)
return ERR_INVALID_ARGS;
// dprintf("%s: vector %d\n", __PRETTY_FUNCTION__, vector);
enter_critical_section();
*REG32(PIC_MASK_LATCH) = 1 << vector;
exit_critical_section();
return NO_ERROR;
}
status_t unmask_interrupt(unsigned int vector)
{
if (vector >= PIC_MAX_INT)
return ERR_INVALID_ARGS;
// dprintf("%s: vector %d\n", __PRETTY_FUNCTION__, vector);
enter_critical_section();
*REG32(PIC_UNMASK_LATCH) = 1 << vector;
exit_critical_section();
return NO_ERROR;
}
enum handler_return platform_irq(struct arm_iframe *frame)
{
// get the current vector
unsigned int vector = *REG32(PIC_CURRENT_NUM);
if (vector == 0xffffffff)
return INT_NO_RESCHEDULE;
// dprintf("platform_irq: spsr 0x%x, pc 0x%x, currthread %p, vector %d\n", frame->spsr, frame->pc, current_thread, vector);
// deliver the interrupt
enum handler_return ret;
ret = INT_NO_RESCHEDULE;
if (int_handler_table[vector].handler)
ret = int_handler_table[vector].handler(int_handler_table[vector].arg);
// dprintf("platform_irq: exit %d\n", ret);
return ret;
}
void platform_fiq(struct arm_iframe *frame)
{
panic("FIQ: unimplemented\n");
}
void register_int_handler(unsigned int vector, int_handler handler, void *arg)
{
if (vector >= PIC_MAX_INT)
panic("register_int_handler: vector out of range %d\n", vector);
enter_critical_section();
int_handler_table[vector].handler = handler;
int_handler_table[vector].arg = arg;
exit_critical_section();
}