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Optimize MMIO handling

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momo5502
2025-04-05 08:55:08 +02:00
parent b696117424
commit d191f8e667
7 changed files with 49 additions and 55 deletions
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25
src/windows-emulator/kusd_mmio.cpp
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@@ -83,13 +83,13 @@ namespace
namespace utils
{
inline void serialize(buffer_serializer& buffer, const KUSER_SHARED_DATA64& kusd)
static void serialize(buffer_serializer& buffer, const KUSER_SHARED_DATA64& kusd)
{
static_assert(KUSD_SIZE == sizeof(kusd));
buffer.write(&kusd, KUSD_SIZE);
}
inline void deserialize(buffer_deserializer& buffer, KUSER_SHARED_DATA64& kusd)
static void deserialize(buffer_deserializer& buffer, KUSER_SHARED_DATA64& kusd)
{
buffer.read(&kusd, KUSD_SIZE);
}
@@ -130,30 +130,21 @@ void kusd_mmio::deserialize(utils::buffer_deserializer& buffer)
this->register_mmio();
}
uint64_t kusd_mmio::read(const uint64_t addr, const size_t size)
void kusd_mmio::read(const uint64_t addr, void* data, const size_t size)
{
uint64_t result{};
this->update();
if (addr >= KUSD_SIZE)
{
return result;
return;
}
const auto end = addr + size;
const auto valid_end = std::min(end, static_cast<uint64_t>(KUSD_SIZE));
const auto real_size = valid_end - addr;
if (real_size > sizeof(result))
{
return result;
}
const auto* kusd_buffer = reinterpret_cast<uint8_t*>(&this->kusd_);
memcpy(&result, kusd_buffer + addr, real_size);
return result;
memcpy(data, kusd_buffer + addr, real_size);
}
uint64_t kusd_mmio::address()
@@ -178,8 +169,10 @@ void kusd_mmio::register_mmio()
this->memory_->allocate_mmio(
KUSD_ADDRESS, KUSD_BUFFER_SIZE,
[this](const uint64_t addr, const size_t size) { return this->read(addr, size); },
[](const uint64_t, const size_t, const uint64_t) {
[this](const uint64_t addr, void* data, const size_t size) {
this->read(addr, data, size); //
},
[](const uint64_t, const void*, const size_t) {
// Writing not supported!
});
}