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/>.
24 #define CACHE_ID 0x410000c8
26 typedef struct l2x0_state {
34 uint32_t filter_start;
38 static const VMStateDescription vmstate_l2x0 = {
41 .minimum_version_id = 1,
42 .fields = (VMStateField[]) {
43 VMSTATE_UINT32(ctrl, l2x0_state),
44 VMSTATE_UINT32(aux_ctrl, l2x0_state),
45 VMSTATE_UINT32(data_ctrl, l2x0_state),
46 VMSTATE_UINT32(tag_ctrl, l2x0_state),
47 VMSTATE_UINT32(filter_start, l2x0_state),
48 VMSTATE_UINT32(filter_end, l2x0_state),
54 static uint64_t l2x0_priv_read(void *opaque, target_phys_addr_t offset,
58 l2x0_state *s = (l2x0_state *)opaque;
60 if (offset >= 0x730 && offset < 0x800) {
61 return 0; /* cache ops complete */
67 /* aux_ctrl values affect cache_type values */
68 cache_data = (s->aux_ctrl & (7 << 17)) >> 15;
69 cache_data |= (s->aux_ctrl & (1 << 16)) >> 16;
70 return s->cache_type |= (cache_data << 18) | (cache_data << 6);
80 return s->filter_start;
90 fprintf(stderr, "l2x0_priv_read: Bad offset %x\n", (int)offset);
96 static void l2x0_priv_write(void *opaque, target_phys_addr_t offset,
97 uint64_t value, unsigned size)
99 l2x0_state *s = (l2x0_state *)opaque;
101 if (offset >= 0x730 && offset < 0x800) {
116 s->data_ctrl = value;
119 s->filter_start = value;
122 s->filter_end = value;
131 fprintf(stderr, "l2x0_priv_write: Bad offset %x\n", (int)offset);
136 static void l2x0_priv_reset(DeviceState *dev)
138 l2x0_state *s = DO_UPCAST(l2x0_state, busdev.qdev, dev);
141 s->aux_ctrl = 0x02020000;
148 static const MemoryRegionOps l2x0_mem_ops = {
149 .read = l2x0_priv_read,
150 .write = l2x0_priv_write,
151 .endianness = DEVICE_NATIVE_ENDIAN,
154 static int l2x0_priv_init(SysBusDevice *dev)
156 l2x0_state *s = FROM_SYSBUS(l2x0_state, dev);
158 memory_region_init_io(&s->iomem, &l2x0_mem_ops, s, "l2x0_cc", 0x1000);
159 sysbus_init_mmio(dev, &s->iomem);
163 static void l2x0_class_init(ObjectClass *klass, void *data)
165 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
167 k->init = l2x0_priv_init;
170 static DeviceInfo l2x0_info = {
172 .size = sizeof(l2x0_state),
173 .vmsd = &vmstate_l2x0,
175 .props = (Property[]) {
176 DEFINE_PROP_UINT32("type", l2x0_state, cache_type, 0x1c100100),
177 DEFINE_PROP_END_OF_LIST(),
179 .reset = l2x0_priv_reset,
180 .class_init = l2x0_class_init,
183 static void l2x0_register_device(void)
185 sysbus_qdev_register(&l2x0_info);
188 device_init(l2x0_register_device)