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Map the PSP-2000 extra RAM for homebrew PBPs, outside the user partition

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Homebrew written for a PSP-2000+ under custom firmware can use the top
32MB of RAM directly without setting MEMSIZE, which leaves the user
partition at its normal size. NJEMU's slim builds do this (#8925).
Previously we didn't map that memory at all for PBPs; MEMSIZE=1 isn't a
workaround either, since it grows the partition and the heap and stacks
land where the program writes.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Henrik RydgårdandClaude Opus 5.5 committed 2026-09-29 12:40:59 -06:00
1 parent c9a631c336
commit 3062ffd695
5 files changed
+29 -3
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Core/HLE/sceKernelMemory.cpp
+3 -2
View File
@@ -321,7 +321,7 @@ void __KernelMemoryInit()
{
MemBlockInfoInit();
kernelMemory.Init(PSP_GetKernelMemoryBase(), PSP_GetKernelMemoryEnd() - PSP_GetKernelMemoryBase(), false);
userMemory.Init(PSP_GetUserMemoryBase(), PSP_GetUserMemoryEnd() - PSP_GetUserMemoryBase(), false);
userMemory.Init(PSP_GetUserMemoryBase(), PSP_GetUserPartitionEnd() - PSP_GetUserMemoryBase(), false);
volatileMemory.Init(PSP_GetVolatileMemoryStart(), PSP_GetVolatileMemoryEnd() - PSP_GetVolatileMemoryStart(), false);
Memory::Memset(PSP_GetKernelMemoryBase(), 0, PSP_GetKernelMemoryEnd() - PSP_GetKernelMemoryBase());
@@ -1712,7 +1712,8 @@ static u32 SysMemUserForUser_D8DE5C1E() {
// Real name per uofw's src/kd/sysmem/exports.exp: sceKernelTotalMemSize - the total size (not
// free size, see sceKernelMaxFreeMemSize above) of the user memory partition.
static u32 sceKernelTotalMemSize() {
return hleLogDebug(Log::sceKernel, PSP_GetUserMemoryEnd() - PSP_GetUserMemoryBase());
// The partition's own range, which survives savestates (see PSP_GetUserPartitionEnd).
return hleLogDebug(Log::sceKernel, userMemory.GetRangeSize());
}
static u32 SysMemUserForUser_945E45DA() {