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/*
* ITS base class for a GICv3-based system
*
* Copyright (c) 2015 Samsung Electronics Co., Ltd.
* Written by Pavel Fedin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/pci/msi.h"
#include "hw/intc/arm_gicv3_its_common.h"
#include "qemu/log.h"
static int gicv3_its_pre_save(void *opaque)
{
GICv3ITSState *s = (GICv3ITSState *)opaque;
GICv3ITSCommonClass *c = ARM_GICV3_ITS_COMMON_GET_CLASS(s);
if (c->pre_save) {
c->pre_save(s);
}
return 0;
}
static int gicv3_its_post_load(void *opaque, int version_id)
{
GICv3ITSState *s = (GICv3ITSState *)opaque;
GICv3ITSCommonClass *c = ARM_GICV3_ITS_COMMON_GET_CLASS(s);
if (c->post_load) {
c->post_load(s);
}
return 0;
}
static const VMStateDescription vmstate_its = {
.name = "arm_gicv3_its",
.pre_save = gicv3_its_pre_save,
.post_load = gicv3_its_post_load,
.priority = MIG_PRI_GICV3_ITS,
.fields = (VMStateField[]) {
VMSTATE_UINT32(ctlr, GICv3ITSState),
VMSTATE_UINT32(iidr, GICv3ITSState),
VMSTATE_UINT64(cbaser, GICv3ITSState),
VMSTATE_UINT64(cwriter, GICv3ITSState),
VMSTATE_UINT64(creadr, GICv3ITSState),
VMSTATE_UINT64_ARRAY(baser, GICv3ITSState, 8),
VMSTATE_END_OF_LIST()
},
};
static MemTxResult gicv3_its_trans_read(void *opaque, hwaddr offset,
uint64_t *data, unsigned size,
MemTxAttrs attrs)
{
qemu_log_mask(LOG_GUEST_ERROR, "ITS read at offset 0x%"PRIx64"\n", offset);
return MEMTX_ERROR;
}
static MemTxResult gicv3_its_trans_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size,
MemTxAttrs attrs)
{
if (offset == 0x0040 && ((size == 2) || (size == 4))) {
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(opaque);
GICv3ITSCommonClass *c = ARM_GICV3_ITS_COMMON_GET_CLASS(s);
int ret = c->send_msi(s, le64_to_cpu(value), attrs.requester_id);
if (ret <= 0) {
qemu_log_mask(LOG_GUEST_ERROR,
"ITS: Error sending MSI: %s\n", strerror(-ret));
return MEMTX_DECODE_ERROR;
}
return MEMTX_OK;
} else {
qemu_log_mask(LOG_GUEST_ERROR,
"ITS write at bad offset 0x%"PRIx64"\n", offset);
return MEMTX_DECODE_ERROR;
}
}
static const MemoryRegionOps gicv3_its_trans_ops = {
.read_with_attrs = gicv3_its_trans_read,
.write_with_attrs = gicv3_its_trans_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
void gicv3_its_init_mmio(GICv3ITSState *s, const MemoryRegionOps *ops)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(s);
memory_region_init_io(&s->iomem_its_cntrl, OBJECT(s), ops, s,
"control", ITS_CONTROL_SIZE);
memory_region_init_io(&s->iomem_its_translation, OBJECT(s),
&gicv3_its_trans_ops, s,
"translation", ITS_TRANS_SIZE);
/* Our two regions are always adjacent, therefore we now combine them
* into a single one in order to make our users' life easier.
*/
memory_region_init(&s->iomem_main, OBJECT(s), "gicv3_its", ITS_SIZE);
memory_region_add_subregion(&s->iomem_main, 0, &s->iomem_its_cntrl);
memory_region_add_subregion(&s->iomem_main, ITS_CONTROL_SIZE,
&s->iomem_its_translation);
sysbus_init_mmio(sbd, &s->iomem_main);
msi_nonbroken = true;
}
static void gicv3_its_common_reset(DeviceState *dev)
{
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
s->ctlr = 0;
s->cbaser = 0;
s->cwriter = 0;
s->creadr = 0;
s->iidr = 0;
memset(&s->baser, 0, sizeof(s->baser));
gicv3_its_post_load(s, 0);
}
static void gicv3_its_common_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->reset = gicv3_its_common_reset;
dc->vmsd = &vmstate_its;
}
static const TypeInfo gicv3_its_common_info = {
.name = TYPE_ARM_GICV3_ITS_COMMON,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(GICv3ITSState),
.class_size = sizeof(GICv3ITSCommonClass),
.class_init = gicv3_its_common_class_init,
.abstract = true,
};
static void gicv3_its_common_register_types(void)
{
type_register_static(&gicv3_its_common_info);
}
type_init(gicv3_its_common_register_types)
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