50b52b18cd
Update old infocenter.arm.com URLs to the equivalent developer.arm.com ones (the old URLs should redirect, but we might as well avoid the redirection notice, and the new URLs are pleasantly shorter). This commit covers the links to the MPS2 board TRM, the various Application Notes, the IoTKit and SSE-200 documents. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20210215115138.20465-25-peter.maydell@linaro.org
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
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* ARM IoTKit system information block
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*
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* Copyright (c) 2018 Linaro Limited
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* Written by Peter Maydell
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 or
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* (at your option) any later version.
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*/
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/*
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* This is a model of the "system information block" which is part of the
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* Arm IoTKit and documented in
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* https://developer.arm.com/documentation/ecm0601256/latest
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* It consists of 2 read-only version/config registers, plus the
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* usual ID registers.
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*/
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#include "qemu/osdep.h"
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#include "qemu/log.h"
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#include "qemu/module.h"
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#include "trace.h"
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#include "qapi/error.h"
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#include "hw/sysbus.h"
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#include "hw/registerfields.h"
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#include "hw/misc/iotkit-sysinfo.h"
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#include "hw/qdev-properties.h"
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REG32(SYS_VERSION, 0x0)
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REG32(SYS_CONFIG, 0x4)
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REG32(PID4, 0xfd0)
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REG32(PID5, 0xfd4)
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REG32(PID6, 0xfd8)
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REG32(PID7, 0xfdc)
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REG32(PID0, 0xfe0)
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REG32(PID1, 0xfe4)
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REG32(PID2, 0xfe8)
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REG32(PID3, 0xfec)
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REG32(CID0, 0xff0)
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REG32(CID1, 0xff4)
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REG32(CID2, 0xff8)
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REG32(CID3, 0xffc)
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/* PID/CID values */
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static const int sysinfo_id[] = {
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0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
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0x58, 0xb8, 0x0b, 0x00, /* PID0..PID3 */
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0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
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};
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static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
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unsigned size)
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{
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IoTKitSysInfo *s = IOTKIT_SYSINFO(opaque);
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uint64_t r;
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switch (offset) {
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case A_SYS_VERSION:
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r = s->sys_version;
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break;
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case A_SYS_CONFIG:
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r = s->sys_config;
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break;
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case A_PID4 ... A_CID3:
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r = sysinfo_id[(offset - A_PID4) / 4];
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR,
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"IoTKit SysInfo read: bad offset %x\n", (int)offset);
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r = 0;
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break;
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}
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trace_iotkit_sysinfo_read(offset, r, size);
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return r;
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}
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static void iotkit_sysinfo_write(void *opaque, hwaddr offset,
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uint64_t value, unsigned size)
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{
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trace_iotkit_sysinfo_write(offset, value, size);
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qemu_log_mask(LOG_GUEST_ERROR,
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"IoTKit SysInfo: write to RO offset 0x%x\n", (int)offset);
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}
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static const MemoryRegionOps iotkit_sysinfo_ops = {
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.read = iotkit_sysinfo_read,
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.write = iotkit_sysinfo_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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/* byte/halfword accesses are just zero-padded on reads and writes */
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.impl.min_access_size = 4,
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.impl.max_access_size = 4,
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.valid.min_access_size = 1,
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.valid.max_access_size = 4,
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};
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static Property iotkit_sysinfo_props[] = {
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DEFINE_PROP_UINT32("SYS_VERSION", IoTKitSysInfo, sys_version, 0),
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DEFINE_PROP_UINT32("SYS_CONFIG", IoTKitSysInfo, sys_config, 0),
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DEFINE_PROP_END_OF_LIST()
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};
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static void iotkit_sysinfo_init(Object *obj)
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{
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SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
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IoTKitSysInfo *s = IOTKIT_SYSINFO(obj);
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memory_region_init_io(&s->iomem, obj, &iotkit_sysinfo_ops,
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s, "iotkit-sysinfo", 0x1000);
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sysbus_init_mmio(sbd, &s->iomem);
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}
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static void iotkit_sysinfo_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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/*
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* This device has no guest-modifiable state and so it
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* does not need a reset function or VMState.
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*/
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device_class_set_props(dc, iotkit_sysinfo_props);
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}
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static const TypeInfo iotkit_sysinfo_info = {
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.name = TYPE_IOTKIT_SYSINFO,
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(IoTKitSysInfo),
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.instance_init = iotkit_sysinfo_init,
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.class_init = iotkit_sysinfo_class_init,
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};
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static void iotkit_sysinfo_register_types(void)
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{
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type_register_static(&iotkit_sysinfo_info);
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}
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type_init(iotkit_sysinfo_register_types);
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