hw/arm_pic.c

   1 /*
   2  * Generic ARM Programmable Interrupt Controller support.
   3  *
   4  * Copyright (c) 2006 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licenced under the LGPL
   8  */
   9
  10 #include "hw.h"
  11 #include "arm-misc.h"
  12
  13 /* Stub functions for hardware that doesn't exist.  */
  14 void pic_info(void)
  15 {
  16 }
  17
  18 void irq_info(void)
  19 {
  20 }
  21
  22
  23 /* Input 0 is IRQ and input 1 is FIQ.  */
  24 static void arm_pic_cpu_handler(void *opaque, int irq, int level)
  25 {
  26     CPUState *env = (CPUState *)opaque;
  27     switch (irq) {
  28     case ARM_PIC_CPU_IRQ:
  29         if (level)
  30             cpu_interrupt(env, CPU_INTERRUPT_HARD);
  31         else
  32             cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
  33         break;
  34     case ARM_PIC_CPU_FIQ:
  35         if (level)
  36             cpu_interrupt(env, CPU_INTERRUPT_FIQ);
  37         else
  38             cpu_reset_interrupt(env, CPU_INTERRUPT_FIQ);
  39         break;
  40     default:
  41         cpu_abort(env, "arm_pic_cpu_handler: Bad interrput line %d\n", irq);
  42     }
  43 }
  44
  45 qemu_irq *arm_pic_init_cpu(CPUState *env)
  46 {
  47     return qemu_allocate_irqs(arm_pic_cpu_handler, env, 2);
  48 }