Brandon Kim | fcbc3db | 2022-06-06 21:26:18 -0700 | [diff] [blame^] | 1 | #include "buffer.hpp" |
| 2 | |
| 3 | #include "pci_handler.hpp" |
| 4 | |
| 5 | #include <fmt/format.h> |
| 6 | |
| 7 | #include <array> |
| 8 | #include <cstdint> |
| 9 | #include <memory> |
| 10 | #include <span> |
| 11 | #include <vector> |
| 12 | |
| 13 | namespace bios_bmc_smm_error_logger |
| 14 | { |
| 15 | |
| 16 | BufferImpl::BufferImpl(std::unique_ptr<DataInterface> dataInterface) : |
| 17 | dataInterface(std::move(dataInterface)){}; |
| 18 | |
| 19 | void BufferImpl::initialize(uint32_t bmcInterfaceVersion, uint16_t queueSize, |
| 20 | uint16_t ueRegionSize, |
| 21 | const std::array<uint32_t, 4>& magicNumber) |
| 22 | { |
| 23 | // Initialize the whole buffer with 0x00 |
| 24 | const size_t memoryRegionSize = dataInterface->getMemoryRegionSize(); |
| 25 | const std::vector<uint8_t> emptyVector(memoryRegionSize, 0); |
| 26 | size_t byteWritten = dataInterface->write(0, emptyVector); |
| 27 | if (byteWritten != memoryRegionSize) |
| 28 | { |
| 29 | throw std::runtime_error( |
| 30 | fmt::format("Buffer initialization only erased '{}'", byteWritten)); |
| 31 | } |
| 32 | |
| 33 | // Create an initial buffer header and write to it |
| 34 | struct CircularBufferHeader initializationHeader = {}; |
| 35 | initializationHeader.bmcInterfaceVersion = bmcInterfaceVersion; |
| 36 | initializationHeader.queueSize = queueSize; |
| 37 | initializationHeader.ueRegionSize = ueRegionSize; |
| 38 | initializationHeader.magicNumber = magicNumber; |
| 39 | |
| 40 | uint8_t* initializationHeaderPtr = |
| 41 | reinterpret_cast<uint8_t*>(&initializationHeader); |
| 42 | size_t initializationHeaderSize = sizeof(initializationHeader); |
| 43 | byteWritten = dataInterface->write( |
| 44 | 0, std::span<const uint8_t>(initializationHeaderPtr, |
| 45 | initializationHeaderPtr + |
| 46 | initializationHeaderSize)); |
| 47 | if (byteWritten != initializationHeaderSize) |
| 48 | { |
| 49 | throw std::runtime_error(fmt::format( |
| 50 | "Buffer initialization buffer header write only wrote '{}'", |
| 51 | byteWritten)); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | } // namespace bios_bmc_smm_error_logger |