mirror of https://gitee.com/openkylin/qemu.git
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
|
|
* ARM IoTKit system information block
|
|
*
|
|
* Copyright (c) 2018 Linaro Limited
|
|
* Written by Peter Maydell
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
/*
|
|
* This is a model of the "system information block" which is part of the
|
|
* Arm IoTKit and documented in
|
|
* http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ecm0601256/index.html
|
|
* It consists of 2 read-only version/config registers, plus the
|
|
* usual ID registers.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/log.h"
|
|
#include "qemu/module.h"
|
|
#include "trace.h"
|
|
#include "qapi/error.h"
|
|
#include "hw/sysbus.h"
|
|
#include "hw/registerfields.h"
|
|
#include "hw/misc/iotkit-sysinfo.h"
|
|
#include "hw/qdev-properties.h"
|
|
|
|
REG32(SYS_VERSION, 0x0)
|
|
REG32(SYS_CONFIG, 0x4)
|
|
REG32(PID4, 0xfd0)
|
|
REG32(PID5, 0xfd4)
|
|
REG32(PID6, 0xfd8)
|
|
REG32(PID7, 0xfdc)
|
|
REG32(PID0, 0xfe0)
|
|
REG32(PID1, 0xfe4)
|
|
REG32(PID2, 0xfe8)
|
|
REG32(PID3, 0xfec)
|
|
REG32(CID0, 0xff0)
|
|
REG32(CID1, 0xff4)
|
|
REG32(CID2, 0xff8)
|
|
REG32(CID3, 0xffc)
|
|
|
|
/* PID/CID values */
|
|
static const int sysinfo_id[] = {
|
|
0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
|
|
0x58, 0xb8, 0x0b, 0x00, /* PID0..PID3 */
|
|
0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
|
|
};
|
|
|
|
static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
|
|
unsigned size)
|
|
{
|
|
IoTKitSysInfo *s = IOTKIT_SYSINFO(opaque);
|
|
uint64_t r;
|
|
|
|
switch (offset) {
|
|
case A_SYS_VERSION:
|
|
r = s->sys_version;
|
|
break;
|
|
|
|
case A_SYS_CONFIG:
|
|
r = s->sys_config;
|
|
break;
|
|
case A_PID4 ... A_CID3:
|
|
r = sysinfo_id[(offset - A_PID4) / 4];
|
|
break;
|
|
default:
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"IoTKit SysInfo read: bad offset %x\n", (int)offset);
|
|
r = 0;
|
|
break;
|
|
}
|
|
trace_iotkit_sysinfo_read(offset, r, size);
|
|
return r;
|
|
}
|
|
|
|
static void iotkit_sysinfo_write(void *opaque, hwaddr offset,
|
|
uint64_t value, unsigned size)
|
|
{
|
|
trace_iotkit_sysinfo_write(offset, value, size);
|
|
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"IoTKit SysInfo: write to RO offset 0x%x\n", (int)offset);
|
|
}
|
|
|
|
static const MemoryRegionOps iotkit_sysinfo_ops = {
|
|
.read = iotkit_sysinfo_read,
|
|
.write = iotkit_sysinfo_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
/* byte/halfword accesses are just zero-padded on reads and writes */
|
|
.impl.min_access_size = 4,
|
|
.impl.max_access_size = 4,
|
|
.valid.min_access_size = 1,
|
|
.valid.max_access_size = 4,
|
|
};
|
|
|
|
static Property iotkit_sysinfo_props[] = {
|
|
DEFINE_PROP_UINT32("SYS_VERSION", IoTKitSysInfo, sys_version, 0),
|
|
DEFINE_PROP_UINT32("SYS_CONFIG", IoTKitSysInfo, sys_config, 0),
|
|
DEFINE_PROP_END_OF_LIST()
|
|
};
|
|
|
|
static void iotkit_sysinfo_init(Object *obj)
|
|
{
|
|
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
|
|
IoTKitSysInfo *s = IOTKIT_SYSINFO(obj);
|
|
|
|
memory_region_init_io(&s->iomem, obj, &iotkit_sysinfo_ops,
|
|
s, "iotkit-sysinfo", 0x1000);
|
|
sysbus_init_mmio(sbd, &s->iomem);
|
|
}
|
|
|
|
static void iotkit_sysinfo_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
/*
|
|
* This device has no guest-modifiable state and so it
|
|
* does not need a reset function or VMState.
|
|
*/
|
|
|
|
device_class_set_props(dc, iotkit_sysinfo_props);
|
|
}
|
|
|
|
static const TypeInfo iotkit_sysinfo_info = {
|
|
.name = TYPE_IOTKIT_SYSINFO,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(IoTKitSysInfo),
|
|
.instance_init = iotkit_sysinfo_init,
|
|
.class_init = iotkit_sysinfo_class_init,
|
|
};
|
|
|
|
static void iotkit_sysinfo_register_types(void)
|
|
{
|
|
type_register_static(&iotkit_sysinfo_info);
|
|
}
|
|
|
|
type_init(iotkit_sysinfo_register_types);
|