ShuriZma
/
dolphin
mirror of https://github.com/dolphin-emu/dolphin.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

PPCCache: Always invalidate on icbi, even if icache is disabled 

This is more accurate, although it should not make a difference in practice.
This commit is contained in:
Pokechu22 2022-07-07 16:56:46 -07:00
parent ffbbd72741
commit 2f4a3d6f60
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
Source/Core/Core/PowerPC/PPCCache.cpp
View File

@ -419,11 +419,13 @@ void InstructionCache::Invalidate(u32 addr)
{
auto& system = Core::System::GetInstance();
auto& memory = system.GetMemory();
auto& ppc_state = system.GetPPCState();
if (!HID0(ppc_state).ICE || m_disable_icache)
return;
// Invalidates the whole set
// Per the 750cl manual, section 3.4.1.5 Instruction Cache Enabling/Disabling (page 137)
// and section 3.4.2.6 Instruction Cache Block Invalidate (icbi) (page 140), the icbi
// instruction always invalidates, even if the instruction cache is disabled or locked,
// and it also invalidates all ways of the corresponding cache set, not just the way corresponding
// to the given address.
// (However, the icbi instruction's info on page 432 does not include this information)
const u32 set = (addr >> 5) & 0x7f;
for (size_t way = 0; way < 8; way++)
{
@ -440,6 +442,7 @@ void InstructionCache::Invalidate(u32 addr)
valid[set] = 0;
modified[set] = 0;
// Also tell the JIT that the corresponding address has been invalidated
system.GetJitInterface().InvalidateICacheLine(addr);
}