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.
12 #include "qemu/osdep.h"
14 #include "hw/sysbus.h"
15 #include "qom/object.h"
18 #include "hw/unicore32/puv3.h"
19 #include "qemu/module.h"
22 #define TYPE_PUV3_INTC "puv3_intc"
23 OBJECT_DECLARE_SIMPLE_TYPE(PUV3INTCState, PUV3_INTC)
25 struct PUV3INTCState {
26 SysBusDevice parent_obj;
35 /* Update interrupt status after enabled or pending bits have been changed. */
36 static void puv3_intc_update(PUV3INTCState *s)
38 if (s->reg_ICMR & s->reg_ICPR) {
39 qemu_irq_raise(s->parent_irq);
41 qemu_irq_lower(s->parent_irq);
45 /* Process a change in an external INTC input. */
46 static void puv3_intc_handler(void *opaque, int irq, int level)
48 PUV3INTCState *s = opaque;
50 DPRINTF("irq 0x%x, level 0x%x\n", irq, level);
52 s->reg_ICPR |= (1 << irq);
54 s->reg_ICPR &= ~(1 << irq);
59 static uint64_t puv3_intc_read(void *opaque, hwaddr offset,
62 PUV3INTCState *s = opaque;
66 case 0x04: /* INTC_ICMR */
69 case 0x0c: /* INTC_ICIP */
70 ret = s->reg_ICPR; /* the same value with ICPR */
73 qemu_log_mask(LOG_GUEST_ERROR,
74 "%s: Bad read offset 0x%"HWADDR_PRIx"\n",
77 DPRINTF("offset 0x%x, value 0x%x\n", offset, ret);
81 static void puv3_intc_write(void *opaque, hwaddr offset,
82 uint64_t value, unsigned size)
84 PUV3INTCState *s = opaque;
86 DPRINTF("offset 0x%x, value 0x%x\n", offset, value);
88 case 0x00: /* INTC_ICLR */
89 case 0x14: /* INTC_ICCR */
91 case 0x04: /* INTC_ICMR */
95 qemu_log_mask(LOG_GUEST_ERROR,
96 "%s: Bad write offset 0x%"HWADDR_PRIx"\n",
103 static const MemoryRegionOps puv3_intc_ops = {
104 .read = puv3_intc_read,
105 .write = puv3_intc_write,
107 .min_access_size = 4,
108 .max_access_size = 4,
110 .endianness = DEVICE_NATIVE_ENDIAN,
113 static void puv3_intc_realize(DeviceState *dev, Error **errp)
115 PUV3INTCState *s = PUV3_INTC(dev);
116 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
118 qdev_init_gpio_in(dev, puv3_intc_handler, PUV3_IRQS_NR);
119 sysbus_init_irq(sbd, &s->parent_irq);
124 memory_region_init_io(&s->iomem, OBJECT(s), &puv3_intc_ops, s, "puv3_intc",
126 sysbus_init_mmio(sbd, &s->iomem);
129 static void puv3_intc_class_init(ObjectClass *klass, void *data)
131 DeviceClass *dc = DEVICE_CLASS(klass);
132 dc->realize = puv3_intc_realize;
135 static const TypeInfo puv3_intc_info = {
136 .name = TYPE_PUV3_INTC,
137 .parent = TYPE_SYS_BUS_DEVICE,
138 .instance_size = sizeof(PUV3INTCState),
139 .class_init = puv3_intc_class_init,
142 static void puv3_intc_register_type(void)
144 type_register_static(&puv3_intc_info);
147 type_init(puv3_intc_register_type)