hw/arm/pic_cpu.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 licensed under the LGPL
   8  */
   9
  10 #include "hw/hw.h"
  11 #include "hw/arm-misc.h"
  12 #include "sysemu/kvm.h"
  13
  14 /* Input 0 is IRQ and input 1 is FIQ.  */
  15 static void arm_pic_cpu_handler(void *opaque, int irq, int level)
  16 {
  17     ARMCPU *cpu = opaque;
  18     CPUARMState *env = &cpu->env;
  19
  20     switch (irq) {
  21     case ARM_PIC_CPU_IRQ:
  22         if (level)
  23             cpu_interrupt(env, CPU_INTERRUPT_HARD);
  24         else
  25             cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
  26         break;
  27     case ARM_PIC_CPU_FIQ:
  28         if (level)
  29             cpu_interrupt(env, CPU_INTERRUPT_FIQ);
  30         else
  31             cpu_reset_interrupt(env, CPU_INTERRUPT_FIQ);
  32         break;
  33     default:
  34         hw_error("arm_pic_cpu_handler: Bad interrupt line %d\n", irq);
  35     }
  36 }
  37
  38 static void kvm_arm_pic_cpu_handler(void *opaque, int irq, int level)
  39 {
  40 #ifdef CONFIG_KVM
  41     ARMCPU *cpu = opaque;
  42     CPUState *cs = CPU(cpu);
  43     int kvm_irq = KVM_ARM_IRQ_TYPE_CPU << KVM_ARM_IRQ_TYPE_SHIFT;
  44
  45     switch (irq) {
  46     case ARM_PIC_CPU_IRQ:
  47         kvm_irq |= KVM_ARM_IRQ_CPU_IRQ;
  48         break;
  49     case ARM_PIC_CPU_FIQ:
  50         kvm_irq |= KVM_ARM_IRQ_CPU_FIQ;
  51         break;
  52     default:
  53         hw_error("kvm_arm_pic_cpu_handler: Bad interrupt line %d\n", irq);
  54     }
  55     kvm_irq |= cs->cpu_index << KVM_ARM_IRQ_VCPU_SHIFT;
  56     kvm_set_irq(kvm_state, kvm_irq, level ? 1 : 0);
  57 #endif
  58 }
  59
  60 qemu_irq *arm_pic_init_cpu(ARMCPU *cpu)
  61 {
  62     if (kvm_enabled()) {
  63         return qemu_allocate_irqs(kvm_arm_pic_cpu_handler, cpu, 2);
  64     }
  65     return qemu_allocate_irqs(arm_pic_cpu_handler, cpu, 2);
  66 }