63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
#pragma once
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#include <cstdint>
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#include <optional>
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#include "src/DebugServer/Gdb/CommandPackets/CommandPacket.hpp"
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#include "src/Targets/TargetMemory.hpp"
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namespace Bloom::DebugServer::Gdb::AvrGdb::CommandPackets
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{
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/**
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* The MemoryAccessCommandPacket class is a base class for memory access GDB commands that are specific to the AVR
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* architecture.
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*
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* With the GDB implementation for the AVR architecture, read/write memory commands include a special memory
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* address. The memory type (FLASH, RAM, EEPROM, etc) is embedded within the 7 most significant bits of the memory
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* address.
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*
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* This class provides functions to extract and remove the memory type from a given memory address.
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*/
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class MemoryAccessCommandPacket: public Bloom::DebugServer::Gdb::CommandPackets::CommandPacket
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{
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public:
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explicit MemoryAccessCommandPacket(const RawPacketType& rawPacket)
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: CommandPacket(rawPacket)
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{};
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protected:
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/**
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* The mask used by the AVR GDB client to encode the memory type into memory addresses.
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*/
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static constexpr std::uint32_t AVR_GDB_MEMORY_ADDRESS_MASK = 0xFE0000U;
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/**
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* avr-gdb uses the most significant 15 bits in memory addresses to indicate the type of memory being
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* addressed.
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*
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* @param address
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* @return
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*/
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Targets::TargetMemoryType getMemoryTypeFromGdbAddress(std::uint32_t address) {
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if ((address & MemoryAccessCommandPacket::AVR_GDB_MEMORY_ADDRESS_MASK) != 0U) {
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return Targets::TargetMemoryType::RAM;
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}
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return Targets::TargetMemoryType::FLASH;
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}
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/**
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* Strips the most significant 15 bits from a GDB memory address.
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*
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* @param address
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* @return
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*/
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std::uint32_t removeMemoryTypeIndicatorFromGdbAddress(std::uint32_t address) {
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return (address & MemoryAccessCommandPacket::AVR_GDB_MEMORY_ADDRESS_MASK) != 0U
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? (address & ~(MemoryAccessCommandPacket::AVR_GDB_MEMORY_ADDRESS_MASK))
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: address;
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}
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};
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}
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