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Changed the FAST_TLB_CACHE to update its state only if the TLB cache is accessed by the game (not by Dolphin). The FAST_TLB_CACHE (written by booto) is faster and accurate to the hardware. Enabled the FAST_TLB_CACHE by default.

This commit is contained in:
skidau 2014-10-13 18:00:45 +11:00
parent 69a2d0cb96
commit 7b44e79356
1 changed files with 13 additions and 73 deletions
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78
Source/Core/Core/HW/MemmapFunctions.cpp
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@ -694,8 +694,6 @@ void SDRUpdated()
// TLB cache
//#define FAST_TLB_CACHE
#define TLB_SIZE 128
#define TLB_WAYS 2
#define NUM_TLBS 2
@ -715,62 +713,39 @@ struct tlb_entry
};
// TODO: tlb needs to be in ppcState for save-state purposes.
#ifdef FAST_TLB_CACHE
static tlb_entry tlb[NUM_TLBS][TLB_SIZE/TLB_WAYS][TLB_WAYS];
#endif
static u32 LookupTLBPageAddress(const XCheckTLBFlag _Flag, const u32 vpa, u32 *paddr)
{
#ifdef FAST_TLB_CACHE
tlb_entry *tlbe = tlb[_Flag == FLAG_OPCODE][(vpa>>HW_PAGE_INDEX_SHIFT)&HW_PAGE_INDEX_MASK];
if (tlbe[0].tag == (vpa & ~0xfff) && !(tlbe[0].flags & TLB_FLAG_INVALID))
{
if (_Flag != FLAG_NO_EXCEPTION)
{
tlbe[0].flags |= TLB_FLAG_MOST_RECENT;
tlbe[1].flags &= ~TLB_FLAG_MOST_RECENT;
}
*paddr = tlbe[0].paddr | (vpa & 0xfff);
return 1;
}
if (tlbe[1].tag == (vpa & ~0xfff) && !(tlbe[1].flags & TLB_FLAG_INVALID))
{
if (_Flag != FLAG_NO_EXCEPTION)
{
tlbe[1].flags |= TLB_FLAG_MOST_RECENT;
tlbe[0].flags &= ~TLB_FLAG_MOST_RECENT;
}
*paddr = tlbe[1].paddr | (vpa & 0xfff);
return 1;
}
return 0;
#else
u32 _Address = vpa;
if (_Flag == FLAG_OPCODE)
{
for (u32 i = (PowerPC::ppcState.itlb_last); i > (PowerPC::ppcState.itlb_last - 128); i--)
{
if ((_Address & ~0xfff) == (PowerPC::ppcState.itlb_va[i & 127]))
{
*paddr = PowerPC::ppcState.itlb_pa[i & 127] | (_Address & 0xfff);
PowerPC::ppcState.itlb_last = i;
return 1;
}
}
}
else
{
for (u32 i = (PowerPC::ppcState.dtlb_last); i > (PowerPC::ppcState.dtlb_last - 128); i--)
{
if ((_Address & ~0xfff) == (PowerPC::ppcState.dtlb_va[i & 127]))
{
*paddr = PowerPC::ppcState.dtlb_pa[i & 127] | (_Address & 0xfff);
PowerPC::ppcState.dtlb_last = i;
return 1;
}
}
}
return 0;
#endif
}
static void UpdateTLBEntry(const XCheckTLBFlag _Flag, UPTE2 PTE2, const u32 vpa)
{
#ifdef FAST_TLB_CACHE
if (_Flag != FLAG_NO_EXCEPTION)
return;
tlb_entry *tlbe = tlb[_Flag == FLAG_OPCODE][(vpa>>HW_PAGE_INDEX_SHIFT)&HW_PAGE_INDEX_MASK];
if ((tlbe[0].flags & TLB_FLAG_MOST_RECENT) == 0)
{
@ -786,29 +761,10 @@ static void UpdateTLBEntry(const XCheckTLBFlag _Flag, UPTE2 PTE2, const u32 vpa)
tlbe[1].paddr = PTE2.RPN << HW_PAGE_INDEX_SHIFT;
tlbe[1].tag = vpa & ~0xfff;
}
#else
if (_Flag == FLAG_OPCODE)
{
// ITLB cache
PowerPC::ppcState.itlb_last++;
PowerPC::ppcState.itlb_last &= 127;
PowerPC::ppcState.itlb_pa[PowerPC::ppcState.itlb_last] = PTE2.RPN << HW_PAGE_INDEX_SHIFT;
PowerPC::ppcState.itlb_va[PowerPC::ppcState.itlb_last] = vpa & ~0xfff;
}
else
{
// DTLB cache
PowerPC::ppcState.dtlb_last++;
PowerPC::ppcState.dtlb_last &= 127;
PowerPC::ppcState.dtlb_pa[PowerPC::ppcState.dtlb_last] = PTE2.RPN << HW_PAGE_INDEX_SHIFT;
PowerPC::ppcState.dtlb_va[PowerPC::ppcState.dtlb_last] = vpa & ~0xfff;
}
#endif
}
void InvalidateTLBEntry(u32 vpa)
{
#ifdef FAST_TLB_CACHE
tlb_entry *tlbe = tlb[0][(vpa>>HW_PAGE_INDEX_SHIFT)&HW_PAGE_INDEX_MASK];
if (tlbe[0].tag == (vpa & ~0xfff))
{
@ -827,22 +783,6 @@ void InvalidateTLBEntry(u32 vpa)
{
tlbe_i[1].flags |= TLB_FLAG_INVALID;
}
#else
u32 _Address = vpa;
for (int i = 0; i < 128; i++)
{
if ((_Address & ~0xfff) == (PowerPC::ppcState.dtlb_va[(PowerPC::ppcState.dtlb_last + i) & 127]))
{
PowerPC::ppcState.dtlb_pa[(PowerPC::ppcState.dtlb_last + i) & 127] = 0;
PowerPC::ppcState.dtlb_va[(PowerPC::ppcState.dtlb_last + i) & 127] = 0;
}
if ((_Address & ~0xfff) == (PowerPC::ppcState.itlb_va[(PowerPC::ppcState.itlb_last + i) & 127]))
{
PowerPC::ppcState.itlb_pa[(PowerPC::ppcState.itlb_last + i) & 127] = 0;
PowerPC::ppcState.itlb_va[(PowerPC::ppcState.itlb_last + i) & 127] = 0;
}
}
#endif
}
// Page Address Translation