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Merge pull request #13769 from JosJuice/merge-dbat-mappings

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Memmap: Optimize UpdateLogicalMemory by merging mappings
This commit is contained in:
JMC47
2025-06-22 15:29:51 -04:00
committed by GitHub
parent c2aaca2b16 ac84ea17a6
commit fa9f71e482
1 changed files with 16 additions and 1 deletions
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17
Source/Core/Core/HW/Memmap.cpp
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@ -248,9 +248,24 @@ void MemoryManager::UpdateLogicalMemory(const PowerPC::BatTable& dbat_table)
if (dbat_table[i] & PowerPC::BAT_PHYSICAL_BIT) if (dbat_table[i] & PowerPC::BAT_PHYSICAL_BIT)
{ {
u32 logical_address = i << PowerPC::BAT_INDEX_SHIFT; u32 logical_address = i << PowerPC::BAT_INDEX_SHIFT;
// TODO: Merge adjacent mappings to make this faster.
u32 logical_size = PowerPC::BAT_PAGE_SIZE; u32 logical_size = PowerPC::BAT_PAGE_SIZE;
u32 translated_address = dbat_table[i] & PowerPC::BAT_RESULT_MASK; u32 translated_address = dbat_table[i] & PowerPC::BAT_RESULT_MASK;
while (i + 1 < dbat_table.size())
{
if (!(dbat_table[i + 1] & PowerPC::BAT_PHYSICAL_BIT))
{
++i;
break;
}
if ((dbat_table[i + 1] & PowerPC::BAT_RESULT_MASK) != translated_address + logical_size)
break;
++i;
logical_size += PowerPC::BAT_PAGE_SIZE;
}
for (const auto& physical_region : m_physical_regions) for (const auto& physical_region : m_physical_regions)
{ {
if (!physical_region.active) if (!physical_region.active)