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vtlb: Add RAM accessors which avoid hw access

This commit is contained in:
Connor McLaughlin 2022-04-19 00:06:35 +10:00 committed by refractionpcsx2
parent 38ff490b60
commit c0e65d9a36
2 changed files with 45 additions and 0 deletions
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37
pcsx2/vtlb.cpp
View File

@ -315,6 +315,43 @@ template void vtlb_memWrite<mem8_t>(u32 mem, mem8_t data);
template void vtlb_memWrite<mem16_t>(u32 mem, mem16_t data);
template void vtlb_memWrite<mem32_t>(u32 mem, mem32_t data);
template <typename DataType>
bool vtlb_ramRead(u32 addr, DataType* value)
{
const auto vmv = vtlbdata.vmap[addr >> VTLB_PAGE_BITS];
if (vmv.isHandler(addr))
{
std::memset(value, 0, sizeof(DataType));
return false;
}
std::memcpy(value, reinterpret_cast<DataType*>(vmv.assumePtr(addr)), sizeof(DataType));
return true;
}
template <typename DataType>
bool vtlb_ramWrite(u32 addr, const DataType& data)
{
const auto vmv = vtlbdata.vmap[addr >> VTLB_PAGE_BITS];
if (vmv.isHandler(addr))
return false;
std::memcpy(reinterpret_cast<DataType*>(vmv.assumePtr(addr)), &data, sizeof(DataType));
return true;
}
template bool vtlb_ramRead<mem8_t>(u32 mem, mem8_t* value);
template bool vtlb_ramRead<mem16_t>(u32 mem, mem16_t* value);
template bool vtlb_ramRead<mem32_t>(u32 mem, mem32_t* value);
template bool vtlb_ramRead<mem64_t>(u32 mem, mem64_t* value);
template bool vtlb_ramRead<mem128_t>(u32 mem, mem128_t* value);
template bool vtlb_ramWrite<mem8_t>(u32 mem, const mem8_t& data);
template bool vtlb_ramWrite<mem16_t>(u32 mem, const mem16_t& data);
template bool vtlb_ramWrite<mem32_t>(u32 mem, const mem32_t& data);
template bool vtlb_ramWrite<mem64_t>(u32 mem, const mem64_t& data);
template bool vtlb_ramWrite<mem128_t>(u32 mem, const mem128_t& data);
// --------------------------------------------------------------------------------------
// TLB Miss / BusError Handlers
// --------------------------------------------------------------------------------------

8
pcsx2/vtlb.h
View File

@ -96,6 +96,14 @@ extern void vtlb_memWrite(u32 mem, DataType value);
extern void vtlb_memWrite64(u32 mem, const mem64_t* value);
extern void vtlb_memWrite128(u32 mem, const mem128_t* value);
// "Safe" variants of vtlb, designed for external tools.
// These routines only access the various RAM, and will not call handlers
// which has the potential to change hardware state.
template <typename DataType>
extern DataType vtlb_ramRead(u32 mem);
template <typename DataType>
extern bool vtlb_ramWrite(u32 mem, const DataType& value);
extern void vtlb_DynGenWrite(u32 sz);
extern void vtlb_DynGenRead32(u32 bits, bool sign);
extern int vtlb_DynGenRead64(u32 sz, int gpr);