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// Copyright (c) 2021 Intel Corporation
//
// 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 <boost/asio/io_context.hpp>
#include <sdbusplus/asio/connection.hpp>
#define DEBUG_PRINT \
if constexpr (false) \
std::cerr
namespace cpu_info
{
/** Host states which are of interest just to cpuinfo use cases. */
enum class HostState
{
/** Host CPU is powered off. */
off,
/** Host CPU is powered on, but BIOS has not completed POST. */
postInProgress,
/** BIOS has completed POST. */
postComplete
};
/** Current host state - initialized to "off" */
extern HostState hostState;
/**
* Register D-Bus match handlers to keep hostState current. The D-Bus logic is
* entirely asynchronous, so hostState will never change from "off" until after
* this function is called and the asio event loop is running.
*
* @param[in] conn D-Bus ASIO connection.
*/
void hostStateSetup(const std::shared_ptr<sdbusplus::asio::connection>& conn);
constexpr uint64_t bit(uint8_t index)
{
return (1ull << index);
}
/**
* Extract a bitfield from an input data by shifting and masking.
*
* @tparam Dest Destination type - mostly useful to avoid an extra static_cast
* at the call site. Defaults to the Src type if unspecified.
* @tparam Src Automatically deduced from the first positional parameter.
*
* @param data Input data.
* @param loBit 0-based index of the least significant bit to return.
* @param hiBit 0-based index of the most significant bit to return.
*/
template <typename Dest = std::monostate, typename Src>
auto mask(Src data, unsigned int loBit, unsigned int hiBit)
{
assert(hiBit >= loBit);
uint64_t d = data;
d >>= loBit;
d &= (1ull << (hiBit - loBit + 1)) - 1;
if constexpr (std::is_same_v<Dest, std::monostate>)
{
return static_cast<Src>(d);
}
else
{
return static_cast<Dest>(d);
}
}
namespace dbus
{
boost::asio::io_context& getIOContext();
std::shared_ptr<sdbusplus::asio::connection> getConnection();
} // namespace dbus
} // namespace cpu_info