hw/intc/arm_gicv3.c

   1 /*
   2  * ARM Generic Interrupt Controller v3
   3  *
   4  * Copyright (c) 2015 Huawei.
   5  * Copyright (c) 2016 Linaro Limited
   6  * Written by Shlomo Pongratz, Peter Maydell
   7  *
   8  * This code is licensed under the GPL, version 2 or (at your option)
   9  * any later version.
  10  */
  11
  12 /* This file contains implementation code for an interrupt controller
  13  * which implements the GICv3 architecture. Specifically this is where
  14  * the device class itself and the functions for handling interrupts
  15  * coming in and going out live.
  16  */
  17
  18 #include "qemu/osdep.h"
  19 #include "qapi/error.h"
  20 #include "hw/sysbus.h"
  21 #include "hw/intc/arm_gicv3.h"
  22 #include "gicv3_internal.h"
  23
  24 /* Process a change in an external IRQ input. */
  25 static void gicv3_set_irq(void *opaque, int irq, int level)
  26 {
  27     /* Meaning of the 'irq' parameter:
  28      *  [0..N-1] : external interrupts
  29      *  [N..N+31] : PPI (internal) interrupts for CPU 0
  30      *  [N+32..N+63] : PPI (internal interrupts for CPU 1
  31      *  ...
  32      */
  33     /* Do nothing for now */
  34 }
  35
  36 static void arm_gic_realize(DeviceState *dev, Error **errp)
  37 {
  38     /* Device instance realize function for the GIC sysbus device */
  39     GICv3State *s = ARM_GICV3(dev);
  40     ARMGICv3Class *agc = ARM_GICV3_GET_CLASS(s);
  41     Error *local_err = NULL;
  42
  43     agc->parent_realize(dev, &local_err);
  44     if (local_err) {
  45         error_propagate(errp, local_err);
  46         return;
  47     }
  48
  49     gicv3_init_irqs_and_mmio(s, gicv3_set_irq, NULL);
  50 }
  51
  52 static void arm_gicv3_class_init(ObjectClass *klass, void *data)
  53 {
  54     DeviceClass *dc = DEVICE_CLASS(klass);
  55     ARMGICv3Class *agc = ARM_GICV3_CLASS(klass);
  56
  57     agc->parent_realize = dc->realize;
  58     dc->realize = arm_gic_realize;
  59 }
  60
  61 static const TypeInfo arm_gicv3_info = {
  62     .name = TYPE_ARM_GICV3,
  63     .parent = TYPE_ARM_GICV3_COMMON,
  64     .instance_size = sizeof(GICv3State),
  65     .class_init = arm_gicv3_class_init,
  66     .class_size = sizeof(ARMGICv3Class),
  67 };
  68
  69 static void arm_gicv3_register_types(void)
  70 {
  71     type_register_static(&arm_gicv3_info);
  72 }
  73
  74 type_init(arm_gicv3_register_types)