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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stddef.h>
#include <stdint.h>
#include <optional>
#include <string>
namespace android {
namespace hardware {
namespace google {
namespace pixel {
enum class MiscWriterActions : int32_t {
kSetDarkThemeFlag = 0,
kClearDarkThemeFlag,
kSetSotaFlag,
kClearSotaFlag,
kSetEnablePkvmFlag,
kSetDisablePkvmFlag,
kSetWristOrientationFlag,
kClearWristOrientationFlag,
kWriteTimeFormat,
kWriteTimeOffset,
kSetMaxRamSize,
kClearMaxRamSize,
kUnset = -1,
};
class MiscWriter {
public:
static constexpr uint32_t kThemeFlagOffsetInVendorSpace = 0;
static constexpr char kDarkThemeFlag[] = "theme-dark";
static constexpr uint32_t kSotaFlagOffsetInVendorSpace = 32;
static constexpr char kSotaFlag[] = "enable-sota";
static constexpr uint32_t kPkvmFlagOffsetInVendorSpace = 64;
static constexpr char kEnablePkvmFlag[] = "enable-pkvm";
static constexpr char kDisablePkvmFlag[] = "disable-pkvm";
static constexpr uint32_t kWristOrientationFlagOffsetInVendorSpace = 96;
static constexpr char kWristOrientationFlag[] = "wrist-orientation=";
static constexpr uint32_t kTimeFormatValOffsetInVendorSpace = 128;
static constexpr char kTimeFormat[] = "timeformat=";
static constexpr uint32_t kTimeOffsetValOffsetInVendorSpace = 160;
static constexpr char kTimeOffset[] = "timeoffset=";
static constexpr uint32_t kMaxRamSizeOffsetInVendorSpace = 192;
static constexpr char kMaxRamSize[] = "max-ram-size=";
static constexpr uint32_t kSotaStateOffsetInVendorSpace = 224;
// Minimum and maximum valid value for max-ram-size
static constexpr int32_t kRamSizeDefault = -1;
static constexpr uint32_t kRamSizeMin = 2048;
static constexpr uint32_t kRamSizeMax = 65536;
// Minimum and maximum time zone are -12 and 14 hours from GMT
static constexpr int32_t kMinTimeOffset = -12 * 60 * 60 * 1000;
static constexpr int32_t kMaxTimeOffset = 14 * 60 * 60 * 1000;
// Returns true of |size| bytes data starting from |offset| is fully inside the vendor space.
static bool OffsetAndSizeInVendorSpace(size_t offset, size_t size);
// Writes the given data to the vendor space in /misc partition, at the given offset. Note that
// offset is in relative to the start of the vendor space.
static bool WriteMiscPartitionVendorSpace(const void* data, size_t size, size_t offset,
std::string* err);
explicit MiscWriter(const MiscWriterActions& action) : action_(action) {}
explicit MiscWriter(const MiscWriterActions &action, const char data)
: action_(action), chardata_(data) {}
explicit MiscWriter(const MiscWriterActions &action, std::string data)
: action_(action), stringdata_(data) {}
// Performs the stored MiscWriterActions. If |override_offset| is set, writes to the input offset
// in the vendor space of /misc instead of the default offset.
bool PerformAction(std::optional<size_t> override_offset = std::nullopt);
private:
MiscWriterActions action_{ MiscWriterActions::kUnset };
char chardata_{'0'};
std::string stringdata_;
};
} // namespace pixel
} // namespace google
} // namespace hardware
} // namespace android
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