101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
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/*
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* Copyright (c) 2008 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <err.h>
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#include <sys/types.h>
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#include <kernel/thread.h>
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#include <platform.h>
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#include <platform/interrupts.h>
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#include <platform/at91sam7.h>
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#include <arch/arm.h>
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static int do_nothing()
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{
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return INT_NO_RESCHEDULE;
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}
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void platform_init_interrupts(void)
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{
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AT91AIC *aic = AT91AIC_ADDR;
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int n;
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for(n = 0; n < 31; n++) {
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aic->SVR[n] = (unsigned) do_nothing;
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}
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aic->SPU = (unsigned) do_nothing;
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}
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status_t mask_interrupt(unsigned int vector)
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{
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AT91AIC *aic = AT91AIC_ADDR;
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if(vector > 31) return ERR_INVALID_ARGS;
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aic->IDCR = (1 << vector);
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return NO_ERROR;
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}
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status_t unmask_interrupt(unsigned int vector)
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{
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AT91AIC *aic = AT91AIC_ADDR;
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if(vector > 31) return ERR_INVALID_ARGS;
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aic->IECR = (1 << vector);
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return NO_ERROR;
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}
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void platform_irq(struct arm_iframe *frame)
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{
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AT91AIC *aic = AT91AIC_ADDR;
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int_handler func;
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enum handler_return ret;
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inc_critical_section();
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func = (int_handler) aic->IVR;
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// dprintf("platform_irq() -> %p\n", func);
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ret = func(0);
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aic->EOICR = (unsigned) aic;
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if(ret == INT_RESCHEDULE) {
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thread_preempt();
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}
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dec_critical_section();
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}
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void platform_fiq(struct arm_iframe *frame)
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{
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}
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void register_int_handler(unsigned int vector, int_handler handler, void *arg)
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{
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AT91AIC *aic = AT91AIC_ADDR;
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if(vector > 31) return;
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aic->SVR[vector] = (unsigned) handler;
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}
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