blob: 1bfd277d2c5736440ef2b2fcc240a1fe9fca8108 [file] [log] [blame]
/*
* 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 <kernel/thread.h>
#include <platform.h>
#include <platform/interrupts.h>
#include <platform/at91sam7.h>
#include <arch/arm.h>
static int do_nothing()
{
return INT_NO_RESCHEDULE;
}
void platform_init_interrupts(void)
{
AT91AIC *aic = AT91AIC_ADDR;
int n;
for(n = 0; n < 31; n++) {
aic->SVR[n] = (unsigned) do_nothing;
}
aic->SPU = (unsigned) do_nothing;
}
status_t mask_interrupt(unsigned int vector)
{
AT91AIC *aic = AT91AIC_ADDR;
if(vector > 31) return ERR_INVALID_ARGS;
aic->IDCR = (1 << vector);
return NO_ERROR;
}
status_t unmask_interrupt(unsigned int vector)
{
AT91AIC *aic = AT91AIC_ADDR;
if(vector > 31) return ERR_INVALID_ARGS;
aic->IECR = (1 << vector);
return NO_ERROR;
}
void platform_irq(struct arm_iframe *frame)
{
AT91AIC *aic = AT91AIC_ADDR;
int_handler func;
enum handler_return ret;
inc_critical_section();
func = (int_handler) aic->IVR;
// dprintf("platform_irq() -> %p\n", func);
ret = func(0);
aic->EOICR = (unsigned) aic;
if(ret == INT_RESCHEDULE) {
thread_preempt();
}
dec_critical_section();
}
void platform_fiq(struct arm_iframe *frame)
{
}
void register_int_handler(unsigned int vector, int_handler handler, void *arg)
{
AT91AIC *aic = AT91AIC_ADDR;
if(vector > 31) return;
aic->SVR[vector] = (unsigned) handler;
}