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ppcmmu: skip over mode 1 entries when doing PAT flushes

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Mode 1 contains real addressing mode entries, which by definition cannot
be using segment registers. By skipping over them, we can shave off a
couple of seconds from the 10.2 boot time.
This commit is contained in:
Mihai Parparita 2024-07-31 21:47:03 -07:00
parent 02af6da599
commit 76824fb602
1 changed files with 14 additions and 7 deletions
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21
cpu/ppc/ppcmmu.cpp
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@ -797,21 +797,28 @@ static void tlb_flush_entries(std::array<TLBEntry, N> &tlb, TLBFlags type) {
template <const TLBType tlb_type>
void tlb_flush_entries(TLBFlags type)
{
//TLBEntry *m1_tlb, *m2_tlb, *m3_tlb;
int i;
// Mode 1 is real addressing and thus can't contain any PAT entries by definition.
bool flush_mode1 = type != TLBE_FROM_PAT;
if (tlb_type == TLBType::ITLB) {
tlb_flush_entries(itlb1_mode1, type);
if (flush_mode1) {
tlb_flush_entries(itlb1_mode1, type);
}
tlb_flush_entries(itlb1_mode2, type);
tlb_flush_entries(itlb1_mode3, type);
tlb_flush_entries(itlb2_mode1, type);
if (flush_mode1) {
tlb_flush_entries(itlb2_mode1, type);
}
tlb_flush_entries(itlb2_mode2, type);
tlb_flush_entries(itlb2_mode3, type);
} else {
tlb_flush_entries(dtlb1_mode1, type);
if (flush_mode1) {
tlb_flush_entries(dtlb1_mode1, type);
}
tlb_flush_entries(dtlb1_mode2, type);
tlb_flush_entries(dtlb1_mode3, type);
tlb_flush_entries(dtlb2_mode1, type);
if (flush_mode1) {
tlb_flush_entries(dtlb2_mode1, type);
}
tlb_flush_entries(dtlb2_mode2, type);
tlb_flush_entries(dtlb2_mode3, type);
}