thirdparty/ppsspp
2
0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

MemMap: Map 0xC0000000 into virtual memory.

Browse source 
Technically, it should be 0xA0000000, but that causes problems for how we
manage 32-bit address space.  This at least makes things consistent.
This commit is contained in:
Unknown W. Brackets 2021-04-23 23:21:51 -07:00
parent 32ea8734fb
commit f987c715aa
1 changed files with 6 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

6
Core/MemMap.cpp
View file

@ -62,6 +62,9 @@ u8 *m_pUncachedScratchPad;
u8 *m_pPhysicalRAM[3];
u8 *m_pUncachedRAM[3];
u8 *m_pKernelRAM[3]; // RAM mirrored up to "kernel space". Fully accessible at all times currently.
// Technically starts at 0xA0000000, which we don't properly support (but we don't really support kernel code.)
// This matches how we handle 32-bit masking.
u8 *m_pUncachedKernelRAM[3];
// VRAM is mirrored 4 times. The second and fourth mirrors are swizzled.
// In practice, a game accessing the mirrors most likely is deswizzling the depth buffer.
@ -93,14 +96,17 @@ static MemoryView views[] =
{&m_pPhysicalRAM[0], 0x08000000, g_MemorySize, MV_IS_PRIMARY_RAM}, // only from 0x08800000 is it usable (last 24 megs)
{&m_pUncachedRAM[0], 0x48000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM},
{&m_pKernelRAM[0], 0x88000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM | MV_KERNEL},
{&m_pUncachedKernelRAM[0],0xC0000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM | MV_KERNEL},
// Starts at memory + 31 MB.
{&m_pPhysicalRAM[1], 0x09F00000, g_MemorySize, MV_IS_EXTRA1_RAM},
{&m_pUncachedRAM[1], 0x49F00000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_EXTRA1_RAM},
{&m_pKernelRAM[1], 0x89F00000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_EXTRA1_RAM | MV_KERNEL},
{&m_pUncachedKernelRAM[1],0xC9F00000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_EXTRA1_RAM | MV_KERNEL},
// Starts at memory + 31 * 2 MB.
{&m_pPhysicalRAM[2], 0x0BE00000, g_MemorySize, MV_IS_EXTRA2_RAM},
{&m_pUncachedRAM[2], 0x4BE00000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_EXTRA2_RAM},
{&m_pKernelRAM[2], 0x8BE00000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_EXTRA2_RAM | MV_KERNEL},
{&m_pUncachedKernelRAM[2],0xCBE00000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_EXTRA2_RAM | MV_KERNEL},
// TODO: There are a few swizzled mirrors of VRAM, not sure about the best way to
// implement those.