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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.
This commit is contained in:
degasus
2017-03-04 14:55:38 +01:00
parent 54e32fd91e
commit 5152c997a4
5 changed files with 44 additions and 34 deletions
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56
Source/Core/Core/PowerPC/MMU.cpp
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@ -109,7 +109,7 @@ struct TranslateAddressResult
bool Success() const { return result <= PAGE_TABLE_TRANSLATED; }
};
template <const XCheckTLBFlag flag>
static TranslateAddressResult TranslateAddress(const u32 address);
static TranslateAddressResult TranslateAddress(u32 address);
// Nasty but necessary. Super Mario Galaxy pointer relies on this stuff.
static u32 EFB_Read(const u32 addr)
@ -623,7 +623,7 @@ bool IsOptimizableRAMAddress(const u32 address)
// We store whether an access can be optimized to an unchecked access
// in dbat_table.
u32 bat_result = dbat_table[address >> BAT_INDEX_SHIFT];
return (bat_result & 2) != 0;
return (bat_result & BAT_PHYSICAL_BIT) != 0;
}
template <XCheckTLBFlag flag>
@ -1177,27 +1177,29 @@ static void UpdateBATs(BatTable& bat_table, u32 base_spr)
{
// This bit is a little weird: if BRPN & j != 0, we end up with
// a strange mapping. Need to check on hardware.
u32 address = (batl.BRPN | j) << BAT_INDEX_SHIFT;
u32 physical_address = (batl.BRPN | j) << BAT_INDEX_SHIFT;
u32 virtual_address = (batu.BEPI | j) << BAT_INDEX_SHIFT;
// The bottom bit is whether the translation is valid; the second
// bit from the bottom is whether we can use the fastmem arena.
u32 valid_bit = 0x1;
if (Memory::m_pFakeVMEM && ((address & 0xFE000000) == 0x7E000000))
valid_bit = 0x3;
else if (address < Memory::REALRAM_SIZE)
valid_bit = 0x3;
else if (Memory::m_pEXRAM && (address >> 28) == 0x1 &&
(address & 0x0FFFFFFF) < Memory::EXRAM_SIZE)
valid_bit = 0x3;
else if ((address >> 28) == 0xE && (address < (0xE0000000 + Memory::L1_CACHE_SIZE)))
valid_bit = 0x3;
u32 valid_bit = BAT_MAPPED_BIT;
if (Memory::m_pFakeVMEM && (physical_address & 0xFE000000) == 0x7E000000)
valid_bit |= BAT_PHYSICAL_BIT;
else if (physical_address < Memory::REALRAM_SIZE)
valid_bit |= BAT_PHYSICAL_BIT;
else if (Memory::m_pEXRAM && physical_address >> 28 == 0x1 &&
(physical_address & 0x0FFFFFFF) < Memory::EXRAM_SIZE)
valid_bit |= BAT_PHYSICAL_BIT;
else if (physical_address >> 28 == 0xE &&
physical_address < 0xE0000000 + Memory::L1_CACHE_SIZE)
valid_bit |= BAT_PHYSICAL_BIT;
// Fastmem doesn't support memchecks, so disable it for all overlapping virtual pages.
if (PowerPC::memchecks.OverlapsMemcheck(((batu.BEPI | j) << BAT_INDEX_SHIFT),
1 << BAT_INDEX_SHIFT))
valid_bit &= ~0x2;
if (PowerPC::memchecks.OverlapsMemcheck(virtual_address, BAT_PAGE_SIZE))
valid_bit &= ~BAT_PHYSICAL_BIT;
// (BEPI | j) == (BEPI & ~BL) | (j & BL).
bat_table[batu.BEPI | j] = address | valid_bit;
bat_table[virtual_address >> BAT_INDEX_SHIFT] = physical_address | valid_bit;
}
}
}
@ -1210,8 +1212,13 @@ static void UpdateFakeMMUBat(BatTable& bat_table, u32 start_addr)
// Map from 0x4XXXXXXX or 0x7XXXXXXX to the range
// [0x7E000000,0x80000000).
u32 e_address = i + (start_addr >> BAT_INDEX_SHIFT);
u32 p_address = 0x7E000003 | ((i << BAT_INDEX_SHIFT) & Memory::FAKEVMEM_MASK);
bat_table[e_address] = p_address;
u32 p_address = 0x7E000000 | (i << BAT_INDEX_SHIFT & Memory::FAKEVMEM_MASK);
u32 flags = BAT_MAPPED_BIT | BAT_PHYSICAL_BIT;
if (PowerPC::memchecks.OverlapsMemcheck(e_address << BAT_INDEX_SHIFT, BAT_PAGE_SIZE))
flags &= ~BAT_PHYSICAL_BIT;
bat_table[e_address] = p_address | flags;
}
}
@ -1258,14 +1265,11 @@ void IBATUpdated()
// So we first check if there is a matching BAT entry, else we look for the TLB in
// TranslatePageAddress().
template <const XCheckTLBFlag flag>
static TranslateAddressResult TranslateAddress(const u32 address)
static TranslateAddressResult TranslateAddress(u32 address)
{
u32 bat_result = (IsOpcodeFlag(flag) ? ibat_table : dbat_table)[address >> BAT_INDEX_SHIFT];
if (bat_result & 1)
{
u32 result_addr = (bat_result & ~3) | (address & 0x0001FFFF);
return TranslateAddressResult{TranslateAddressResult::BAT_TRANSLATED, result_addr};
}
if (TranslateBatAddess(IsOpcodeFlag(flag) ? ibat_table : dbat_table, &address))
return TranslateAddressResult{TranslateAddressResult::BAT_TRANSLATED, address};
return TranslatePageAddress(address, flag);
}