101 lines
2.5 KiB
C
101 lines
2.5 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 <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;
|
|
}
|