74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/*
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* Generic ARM Programmable Interrupt Controller support.
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*
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* Copyright (c) 2006 CodeSourcery.
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* Written by Paul Brook
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*
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* This code is licenced under the LGPL
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*/
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#include "vl.h"
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#include "arm_pic.h"
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/* Stub functions for hardware that doesn't exist. */
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void pic_set_irq(int irq, int level)
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{
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cpu_abort(cpu_single_env, "pic_set_irq");
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}
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void pic_info(void)
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{
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}
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void irq_info(void)
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{
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}
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void pic_set_irq_new(void *opaque, int irq, int level)
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{
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arm_pic_handler *p = (arm_pic_handler *)opaque;
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/* Call the real handler. */
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(*p)(opaque, irq, level);
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}
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/* Model the IRQ/FIQ CPU interrupt lines as a two input interrupt controller.
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Input 0 is IRQ and input 1 is FIQ. */
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typedef struct
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{
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arm_pic_handler handler;
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CPUState *cpu_env;
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} arm_pic_cpu_state;
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static void arm_pic_cpu_handler(void *opaque, int irq, int level)
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{
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arm_pic_cpu_state *s = (arm_pic_cpu_state *)opaque;
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switch (irq) {
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case ARM_PIC_CPU_IRQ:
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if (level)
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cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);
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else
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cpu_reset_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);
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break;
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case ARM_PIC_CPU_FIQ:
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if (level)
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cpu_interrupt(s->cpu_env, CPU_INTERRUPT_FIQ);
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else
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cpu_reset_interrupt(s->cpu_env, CPU_INTERRUPT_FIQ);
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break;
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default:
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cpu_abort(s->cpu_env, "arm_pic_cpu_handler: Bad interrput line %d\n",
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irq);
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}
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}
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void *arm_pic_init_cpu(CPUState *env)
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{
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arm_pic_cpu_state *s;
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s = (arm_pic_cpu_state *)malloc(sizeof(arm_pic_cpu_state));
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s->handler = arm_pic_cpu_handler;
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s->cpu_env = env;
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return s;
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}
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