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 "pc.h"
  12 #include "arm-misc.h"
  13
  14 /* Stub functions for hardware that doesn't exist.  */
  15 void pic_info(Monitor *mon)
  16 {
  17 }
  18
  19 void irq_info(Monitor *mon)
  20 {
  21 }
  22
  23
  24 /* Input 0 is IRQ and input 1 is FIQ.  */
  25 static void arm_pic_cpu_handler(void *opaque, int irq, int level)
  26 {
  27     CPUState *env = (CPUState *)opaque;
  28     switch (irq) {
  29     case ARM_PIC_CPU_IRQ:
  30         if (level)
  31             cpu_interrupt(env, CPU_INTERRUPT_HARD);
  32         else
  33             cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
  34         break;
  35     case ARM_PIC_CPU_FIQ:
  36         if (level)
  37             cpu_interrupt(env, CPU_INTERRUPT_FIQ);
  38         else
  39             cpu_reset_interrupt(env, CPU_INTERRUPT_FIQ);
  40         break;
  41     default:
  42         cpu_abort(env, "arm_pic_cpu_handler: Bad interrput line %d\n", irq);
  43     }
  44 }
  45
  46 qemu_irq *arm_pic_init_cpu(CPUState *env)
  47 {
  48     return qemu_allocate_irqs(arm_pic_cpu_handler, env, 2);
  49 }