118 lines
3.1 KiB
C
118 lines
3.1 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 <debug.h>
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#include <reg.h>
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#include <kernel/thread.h>
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#include <platform/interrupts.h>
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#include <platform/armemu.h>
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#include <arch/ops.h>
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#include <arch/arm.h>
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#include "platform_p.h"
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struct int_handler_struct {
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int_handler handler;
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void *arg;
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};
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static struct int_handler_struct int_handler_table[PIC_MAX_INT];
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void platform_init_interrupts(void)
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{
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// mask all the interrupts
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*REG32(PIC_MASK_LATCH) = 0xffffffff;
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}
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status_t mask_interrupt(unsigned int vector)
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{
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if (vector >= PIC_MAX_INT)
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return ERR_INVALID_ARGS;
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// dprintf("%s: vector %d\n", __PRETTY_FUNCTION__, vector);
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enter_critical_section();
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*REG32(PIC_MASK_LATCH) = 1 << vector;
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exit_critical_section();
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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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if (vector >= PIC_MAX_INT)
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return ERR_INVALID_ARGS;
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// dprintf("%s: vector %d\n", __PRETTY_FUNCTION__, vector);
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enter_critical_section();
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*REG32(PIC_UNMASK_LATCH) = 1 << vector;
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exit_critical_section();
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return NO_ERROR;
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}
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enum handler_return platform_irq(struct arm_iframe *frame)
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{
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// get the current vector
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unsigned int vector = *REG32(PIC_CURRENT_NUM);
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if (vector == 0xffffffff)
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return INT_NO_RESCHEDULE;
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// dprintf("platform_irq: spsr 0x%x, pc 0x%x, currthread %p, vector %d\n", frame->spsr, frame->pc, current_thread, vector);
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// deliver the interrupt
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enum handler_return ret;
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ret = INT_NO_RESCHEDULE;
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if (int_handler_table[vector].handler)
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ret = int_handler_table[vector].handler(int_handler_table[vector].arg);
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// dprintf("platform_irq: exit %d\n", ret);
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return ret;
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}
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void platform_fiq(struct arm_iframe *frame)
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{
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panic("FIQ: unimplemented\n");
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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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if (vector >= PIC_MAX_INT)
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panic("register_int_handler: vector out of range %d\n", vector);
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enter_critical_section();
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int_handler_table[vector].handler = handler;
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int_handler_table[vector].arg = arg;
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exit_critical_section();
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}
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