2 * ARM11MPCore Snoop Control Unit (SCU) emulation
4 * Copyright (c) 2006-2007 CodeSourcery.
5 * Copyright (c) 2013 SUSE LINUX Products GmbH
6 * Written by Paul Brook and Andreas Färber
8 * This code is licensed under the GPL.
11 #include "hw/misc/arm11scu.h"
13 static uint64_t mpcore_scu_read(void *opaque, hwaddr offset,
16 ARM11SCUState *s = (ARM11SCUState *)opaque;
20 case 0x00: /* Control. */
22 case 0x04: /* Configuration. */
23 id = ((1 << s->num_cpu) - 1) << 4;
24 return id | (s->num_cpu - 1);
25 case 0x08: /* CPU status. */
27 case 0x0c: /* Invalidate all. */
30 qemu_log_mask(LOG_GUEST_ERROR,
31 "mpcore_priv_read: Bad offset %x\n", (int)offset);
36 static void mpcore_scu_write(void *opaque, hwaddr offset,
37 uint64_t value, unsigned size)
39 ARM11SCUState *s = (ARM11SCUState *)opaque;
42 case 0: /* Control register. */
43 s->control = value & 1;
45 case 0x0c: /* Invalidate all. */
46 /* This is a no-op as cache is not emulated. */
49 qemu_log_mask(LOG_GUEST_ERROR,
50 "mpcore_priv_read: Bad offset %x\n", (int)offset);
54 static const MemoryRegionOps mpcore_scu_ops = {
55 .read = mpcore_scu_read,
56 .write = mpcore_scu_write,
57 .endianness = DEVICE_NATIVE_ENDIAN,
60 static void arm11_scu_realize(DeviceState *dev, Error **errp)
64 static void arm11_scu_init(Object *obj)
66 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
67 ARM11SCUState *s = ARM11_SCU(obj);
69 memory_region_init_io(&s->iomem, OBJECT(s),
70 &mpcore_scu_ops, s, "mpcore-scu", 0x100);
71 sysbus_init_mmio(sbd, &s->iomem);
74 static Property arm11_scu_properties[] = {
75 DEFINE_PROP_UINT32("num-cpu", ARM11SCUState, num_cpu, 1),
76 DEFINE_PROP_END_OF_LIST()
79 static void arm11_scu_class_init(ObjectClass *oc, void *data)
81 DeviceClass *dc = DEVICE_CLASS(oc);
83 dc->realize = arm11_scu_realize;
84 dc->props = arm11_scu_properties;
87 static const TypeInfo arm11_scu_type_info = {
88 .name = TYPE_ARM11_SCU,
89 .parent = TYPE_SYS_BUS_DEVICE,
90 .instance_size = sizeof(ARM11SCUState),
91 .instance_init = arm11_scu_init,
92 .class_init = arm11_scu_class_init,
95 static void arm11_scu_register_types(void)
97 type_register_static(&arm11_scu_type_info);
100 type_init(arm11_scu_register_types)