mirror of https://gitlab.com/qemu-project/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/*
|
|
* ARM SBSA Reference Platform Embedded Controller
|
|
*
|
|
* A device to allow PSCI running in the secure side of sbsa-ref machine
|
|
* to communicate platform power states to qemu.
|
|
*
|
|
* Copyright (c) 2020 Nuvia Inc
|
|
* Written by Graeme Gregory <graeme@nuviainc.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/log.h"
|
|
#include "hw/sysbus.h"
|
|
#include "sysemu/runstate.h"
|
|
|
|
typedef struct SECUREECState {
|
|
SysBusDevice parent_obj;
|
|
MemoryRegion iomem;
|
|
} SECUREECState;
|
|
|
|
#define TYPE_SBSA_SECURE_EC "sbsa-ec"
|
|
OBJECT_DECLARE_SIMPLE_TYPE(SECUREECState, SBSA_SECURE_EC)
|
|
|
|
enum sbsa_ec_powerstates {
|
|
SBSA_EC_CMD_POWEROFF = 0x01,
|
|
SBSA_EC_CMD_REBOOT = 0x02,
|
|
};
|
|
|
|
static uint64_t sbsa_ec_read(void *opaque, hwaddr offset, unsigned size)
|
|
{
|
|
/* No use for this currently */
|
|
qemu_log_mask(LOG_GUEST_ERROR, "sbsa-ec: no readable registers");
|
|
return 0;
|
|
}
|
|
|
|
static void sbsa_ec_write(void *opaque, hwaddr offset,
|
|
uint64_t value, unsigned size)
|
|
{
|
|
if (offset == 0) { /* PSCI machine power command register */
|
|
switch (value) {
|
|
case SBSA_EC_CMD_POWEROFF:
|
|
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
|
|
break;
|
|
case SBSA_EC_CMD_REBOOT:
|
|
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
|
|
break;
|
|
default:
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"sbsa-ec: unknown power command");
|
|
}
|
|
} else {
|
|
qemu_log_mask(LOG_GUEST_ERROR, "sbsa-ec: unknown EC register");
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps sbsa_ec_ops = {
|
|
.read = sbsa_ec_read,
|
|
.write = sbsa_ec_write,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
.valid.min_access_size = 4,
|
|
.valid.max_access_size = 4,
|
|
};
|
|
|
|
static void sbsa_ec_init(Object *obj)
|
|
{
|
|
SECUREECState *s = SBSA_SECURE_EC(obj);
|
|
SysBusDevice *dev = SYS_BUS_DEVICE(obj);
|
|
|
|
memory_region_init_io(&s->iomem, obj, &sbsa_ec_ops, s, "sbsa-ec",
|
|
0x1000);
|
|
sysbus_init_mmio(dev, &s->iomem);
|
|
}
|
|
|
|
static void sbsa_ec_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
/* No vmstate or reset required: device has no internal state */
|
|
dc->user_creatable = false;
|
|
}
|
|
|
|
static const TypeInfo sbsa_ec_info = {
|
|
.name = TYPE_SBSA_SECURE_EC,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(SECUREECState),
|
|
.instance_init = sbsa_ec_init,
|
|
.class_init = sbsa_ec_class_init,
|
|
};
|
|
|
|
static void sbsa_ec_register_type(void)
|
|
{
|
|
type_register_static(&sbsa_ec_info);
|
|
}
|
|
|
|
type_init(sbsa_ec_register_type);
|