2 * ARM dummy L210, L220, PL310 cache controller.
4 * Copyright (c) 2010-2012 Calxeda
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2 or any later version, as published by the Free Software
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "hw/sysbus.h"
24 #define CACHE_ID 0x410000c8
26 #define TYPE_ARM_L2X0 "l2x0"
27 #define ARM_L2X0(obj) OBJECT_CHECK(L2x0State, (obj), TYPE_ARM_L2X0)
29 typedef struct L2x0State {
30 SysBusDevice parent_obj;
38 uint32_t filter_start;
42 static const VMStateDescription vmstate_l2x0 = {
45 .minimum_version_id = 1,
46 .fields = (VMStateField[]) {
47 VMSTATE_UINT32(ctrl, L2x0State),
48 VMSTATE_UINT32(aux_ctrl, L2x0State),
49 VMSTATE_UINT32(data_ctrl, L2x0State),
50 VMSTATE_UINT32(tag_ctrl, L2x0State),
51 VMSTATE_UINT32(filter_start, L2x0State),
52 VMSTATE_UINT32(filter_end, L2x0State),
58 static uint64_t l2x0_priv_read(void *opaque, hwaddr offset,
62 L2x0State *s = (L2x0State *)opaque;
64 if (offset >= 0x730 && offset < 0x800) {
65 return 0; /* cache ops complete */
71 /* aux_ctrl values affect cache_type values */
72 cache_data = (s->aux_ctrl & (7 << 17)) >> 15;
73 cache_data |= (s->aux_ctrl & (1 << 16)) >> 16;
74 return s->cache_type |= (cache_data << 18) | (cache_data << 6);
84 return s->filter_start;
94 qemu_log_mask(LOG_GUEST_ERROR,
95 "l2x0_priv_read: Bad offset %x\n", (int)offset);
101 static void l2x0_priv_write(void *opaque, hwaddr offset,
102 uint64_t value, unsigned size)
104 L2x0State *s = (L2x0State *)opaque;
106 if (offset >= 0x730 && offset < 0x800) {
121 s->data_ctrl = value;
124 s->filter_start = value;
127 s->filter_end = value;
136 qemu_log_mask(LOG_GUEST_ERROR,
137 "l2x0_priv_write: Bad offset %x\n", (int)offset);
142 static void l2x0_priv_reset(DeviceState *dev)
144 L2x0State *s = ARM_L2X0(dev);
147 s->aux_ctrl = 0x02020000;
154 static const MemoryRegionOps l2x0_mem_ops = {
155 .read = l2x0_priv_read,
156 .write = l2x0_priv_write,
157 .endianness = DEVICE_NATIVE_ENDIAN,
160 static int l2x0_priv_init(SysBusDevice *dev)
162 L2x0State *s = ARM_L2X0(dev);
164 memory_region_init_io(&s->iomem, OBJECT(dev), &l2x0_mem_ops, s,
166 sysbus_init_mmio(dev, &s->iomem);
170 static Property l2x0_properties[] = {
171 DEFINE_PROP_UINT32("cache-type", L2x0State, cache_type, 0x1c100100),
172 DEFINE_PROP_END_OF_LIST(),
175 static void l2x0_class_init(ObjectClass *klass, void *data)
177 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
178 DeviceClass *dc = DEVICE_CLASS(klass);
180 k->init = l2x0_priv_init;
181 dc->vmsd = &vmstate_l2x0;
182 dc->props = l2x0_properties;
183 dc->reset = l2x0_priv_reset;
186 static const TypeInfo l2x0_info = {
187 .name = TYPE_ARM_L2X0,
188 .parent = TYPE_SYS_BUS_DEVICE,
189 .instance_size = sizeof(L2x0State),
190 .class_init = l2x0_class_init,
193 static void l2x0_register_types(void)
195 type_register_static(&l2x0_info);
198 type_init(l2x0_register_types)