2 * INTC device simulation in PKUnity SoC
4 * Copyright (C) 2010-2012 Guan Xuetao
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation, or any later version.
9 * See the COPYING file in the top-level directory.
11 #include "hw/sysbus.h"
14 #include "hw/unicore32/puv3.h"
16 #define TYPE_PUV3_INTC "puv3_intc"
17 #define PUV3_INTC(obj) OBJECT_CHECK(PUV3INTCState, (obj), TYPE_PUV3_INTC)
19 typedef struct PUV3INTCState {
20 SysBusDevice parent_obj;
29 /* Update interrupt status after enabled or pending bits have been changed. */
30 static void puv3_intc_update(PUV3INTCState *s)
32 if (s->reg_ICMR & s->reg_ICPR) {
33 qemu_irq_raise(s->parent_irq);
35 qemu_irq_lower(s->parent_irq);
39 /* Process a change in an external INTC input. */
40 static void puv3_intc_handler(void *opaque, int irq, int level)
42 PUV3INTCState *s = opaque;
44 DPRINTF("irq 0x%x, level 0x%x\n", irq, level);
46 s->reg_ICPR |= (1 << irq);
48 s->reg_ICPR &= ~(1 << irq);
53 static uint64_t puv3_intc_read(void *opaque, hwaddr offset,
56 PUV3INTCState *s = opaque;
60 case 0x04: /* INTC_ICMR */
63 case 0x0c: /* INTC_ICIP */
64 ret = s->reg_ICPR; /* the same value with ICPR */
67 DPRINTF("Bad offset %x\n", (int)offset);
69 DPRINTF("offset 0x%x, value 0x%x\n", offset, ret);
73 static void puv3_intc_write(void *opaque, hwaddr offset,
74 uint64_t value, unsigned size)
76 PUV3INTCState *s = opaque;
78 DPRINTF("offset 0x%x, value 0x%x\n", offset, value);
80 case 0x00: /* INTC_ICLR */
81 case 0x14: /* INTC_ICCR */
83 case 0x04: /* INTC_ICMR */
87 DPRINTF("Bad offset 0x%x\n", (int)offset);
93 static const MemoryRegionOps puv3_intc_ops = {
94 .read = puv3_intc_read,
95 .write = puv3_intc_write,
100 .endianness = DEVICE_NATIVE_ENDIAN,
103 static int puv3_intc_init(SysBusDevice *sbd)
105 DeviceState *dev = DEVICE(sbd);
106 PUV3INTCState *s = PUV3_INTC(dev);
108 qdev_init_gpio_in(dev, puv3_intc_handler, PUV3_IRQS_NR);
109 sysbus_init_irq(sbd, &s->parent_irq);
114 memory_region_init_io(&s->iomem, OBJECT(s), &puv3_intc_ops, s, "puv3_intc",
116 sysbus_init_mmio(sbd, &s->iomem);
121 static void puv3_intc_class_init(ObjectClass *klass, void *data)
123 SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
125 sdc->init = puv3_intc_init;
128 static const TypeInfo puv3_intc_info = {
129 .name = TYPE_PUV3_INTC,
130 .parent = TYPE_SYS_BUS_DEVICE,
131 .instance_size = sizeof(PUV3INTCState),
132 .class_init = puv3_intc_class_init,
135 static void puv3_intc_register_type(void)
137 type_register_static(&puv3_intc_info);
140 type_init(puv3_intc_register_type)