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MMU: Create constants for our BAT flags.

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This avoids a few hard-coded constants in several files.
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degasus committed 2017-03-15 09:20:40 +01:00
1 parent 54e32fd91e
commit 5152c997a4
5 files changed
+44 -34
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Source/Core/Core/PowerPC/PowerPC.h
+7 -3
View File
@@ -288,16 +288,20 @@ struct TranslateResult
};
TranslateResult JitCache_TranslateAddress(u32 address);
static const int BAT_INDEX_SHIFT = 17;
constexpr int BAT_INDEX_SHIFT = 17;
constexpr u32 BAT_PAGE_SIZE = 1 << BAT_INDEX_SHIFT;
constexpr u32 BAT_MAPPED_BIT = 0x1;
constexpr u32 BAT_PHYSICAL_BIT = 0x2;
constexpr u32 BAT_RESULT_MASK = ~0x3;
using BatTable = std::array<u32, 1 << (32 - BAT_INDEX_SHIFT)>; // 128 KB
extern BatTable ibat_table;
extern BatTable dbat_table;
inline bool TranslateBatAddess(const BatTable& bat_table, u32* address)
{
u32 bat_result = bat_table[*address >> BAT_INDEX_SHIFT];
if ((bat_result & 1) == 0)
if ((bat_result & BAT_MAPPED_BIT) == 0)
return false;
*address = (bat_result & ~3) | (*address & 0x0001FFFF);
*address = (bat_result & BAT_RESULT_MASK) | (*address & (BAT_PAGE_SIZE - 1));
return true;
}
} // namespace