qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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realview_gic.c (2495B)

      1 /*
      2  * ARM RealView Emulation Baseboard Interrupt Controller
      3  *
      4  * Copyright (c) 2006-2007 CodeSourcery.
      5  * Written by Paul Brook
      6  *
      7  * This code is licensed under the GPL.
      8  */
      9 
     10 #include "qemu/osdep.h"
     11 #include "qapi/error.h"
     12 #include "qemu/module.h"
     13 #include "hw/intc/realview_gic.h"
     14 #include "hw/irq.h"
     15 #include "hw/qdev-properties.h"
     16 
     17 static void realview_gic_set_irq(void *opaque, int irq, int level)
     18 {
     19     RealViewGICState *s = (RealViewGICState *)opaque;
     20 
     21     qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
     22 }
     23 
     24 static void realview_gic_realize(DeviceState *dev, Error **errp)
     25 {
     26     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     27     RealViewGICState *s = REALVIEW_GIC(dev);
     28     SysBusDevice *busdev;
     29     /* The GICs on the RealView boards have a fixed nonconfigurable
     30      * number of interrupt lines, so we don't need to expose this as
     31      * a qdev property.
     32      */
     33     int numirq = 96;
     34 
     35     qdev_prop_set_uint32(DEVICE(&s->gic), "num-irq", numirq);
     36     if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic), errp)) {
     37         return;
     38     }
     39     busdev = SYS_BUS_DEVICE(&s->gic);
     40 
     41     /* Pass through outbound IRQ lines from the GIC */
     42     sysbus_pass_irq(sbd, busdev);
     43 
     44     /* Pass through inbound GPIO lines to the GIC */
     45     qdev_init_gpio_in(dev, realview_gic_set_irq, numirq - 32);
     46 
     47     memory_region_add_subregion(&s->container, 0,
     48                                 sysbus_mmio_get_region(busdev, 1));
     49     memory_region_add_subregion(&s->container, 0x1000,
     50                                 sysbus_mmio_get_region(busdev, 0));
     51 }
     52 
     53 static void realview_gic_init(Object *obj)
     54 {
     55     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
     56     RealViewGICState *s = REALVIEW_GIC(obj);
     57 
     58     memory_region_init(&s->container, OBJECT(s),
     59                        "realview-gic-container", 0x2000);
     60     sysbus_init_mmio(sbd, &s->container);
     61 
     62     object_initialize_child(obj, "gic", &s->gic, TYPE_ARM_GIC);
     63     qdev_prop_set_uint32(DEVICE(&s->gic), "num-cpu", 1);
     64 }
     65 
     66 static void realview_gic_class_init(ObjectClass *oc, void *data)
     67 {
     68     DeviceClass *dc = DEVICE_CLASS(oc);
     69 
     70     dc->realize = realview_gic_realize;
     71 }
     72 
     73 static const TypeInfo realview_gic_info = {
     74     .name          = TYPE_REALVIEW_GIC,
     75     .parent        = TYPE_SYS_BUS_DEVICE,
     76     .instance_size = sizeof(RealViewGICState),
     77     .instance_init = realview_gic_init,
     78     .class_init    = realview_gic_class_init,
     79 };
     80 
     81 static void realview_gic_register_types(void)
     82 {
     83     type_register_static(&realview_gic_info);
     84 }
     85 
     86 type_init(realview_gic_register_types)