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#ifndef TALLER_MEM_IMPL_HPP
#define TALLER_MEM_IMPL_HPP
#include <cassert>
#include <cstdint>
#include <memory>
namespace taller::avalon
{
template<typename Cell>
mem<Cell>::mem(std::uint32_t base, std::uint32_t size)
: slave(base, size, sizeof(Cell)),
block(std::make_unique<Cell[]>(size >> word_bits()))
{}
template<typename Cell>
template<typename F>
void mem<Cell>::load(F loader, std::size_t offset)
{
auto base = base_address();
auto bits = word_bits();
std::size_t size = address_span();
std::size_t addr = base_address() + offset;
while(addr >= base && addr < base + size)
{
std::size_t read = loader(&block[(addr - base) >> bits], (base + size - addr) >> bits);
if(read == 0)
{
break;
}
addr += read << bits;
}
}
template<typename Cell>
bool mem<Cell>::read(std::uint32_t addr, std::uint32_t &data)
{
data = block[addr];
return ready();
}
template<typename Cell>
bool mem<Cell>::write(std::uint32_t addr, std::uint32_t data, unsigned byte_enable)
{
std::uint32_t bytes = 0;
if(byte_enable & 0b1000)
{
bytes |= 0xff << 24;
}
if(byte_enable & 0b0100)
{
bytes |= 0xff << 16;
}
if(byte_enable & 0b0010)
{
bytes |= 0xff << 8;
}
if(byte_enable & 0b0001)
{
bytes |= 0xff;
}
block[addr] = (data & bytes) | (block[addr] & ~bytes);
return ready();
}
template<typename Cell>
bool mem<Cell>::ready() noexcept
{
count = count > 0 ? count - 1 : 2;
return count == 0;
}
}
#endif
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