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/arm.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     CPUState *cs = CPU(cpu);
  19
  20     switch (irq) {
  21     case ARM_PIC_CPU_IRQ:
  22         if (level) {
  23             cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  24         } else {
  25             cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  26         }
  27         break;
  28     case ARM_PIC_CPU_FIQ:
  29         if (level) {
  30             cpu_interrupt(cs, CPU_INTERRUPT_FIQ);
  31         } else {
  32             cpu_reset_interrupt(cs, CPU_INTERRUPT_FIQ);
  33         }
  34         break;
  35     default:
  36         hw_error("arm_pic_cpu_handler: Bad interrupt line %d\n", irq);
  37     }
  38 }
  39
  40 static void kvm_arm_pic_cpu_handler(void *opaque, int irq, int level)
  41 {
  42 #ifdef CONFIG_KVM
  43     ARMCPU *cpu = opaque;
  44     CPUState *cs = CPU(cpu);
  45     int kvm_irq = KVM_ARM_IRQ_TYPE_CPU << KVM_ARM_IRQ_TYPE_SHIFT;
  46
  47     switch (irq) {
  48     case ARM_PIC_CPU_IRQ:
  49         kvm_irq |= KVM_ARM_IRQ_CPU_IRQ;
  50         break;
  51     case ARM_PIC_CPU_FIQ:
  52         kvm_irq |= KVM_ARM_IRQ_CPU_FIQ;
  53         break;
  54     default:
  55         hw_error("kvm_arm_pic_cpu_handler: Bad interrupt line %d\n", irq);
  56     }
  57     kvm_irq |= cs->cpu_index << KVM_ARM_IRQ_VCPU_SHIFT;
  58     kvm_set_irq(kvm_state, kvm_irq, level ? 1 : 0);
  59 #endif
  60 }
  61
  62 qemu_irq *arm_pic_init_cpu(ARMCPU *cpu)
  63 {
  64     if (kvm_enabled()) {
  65         return qemu_allocate_irqs(kvm_arm_pic_cpu_handler, cpu, 2);
  66     }
  67     return qemu_allocate_irqs(arm_pic_cpu_handler, cpu, 2);
  68 }