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Fixing accesses to the pcsx IO system. #1946

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Merged
merged 2 commits into from
Jul 26, 2025
Merged

Fixing accesses to the pcsx IO system. #1946

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e1be093
Fixing accesses to the pcsx IO system.
nicolasnoble Jul 25, 2025
fca66d1
Merge branch 'main' into pcsx-io-fixes
nicolasnoble Jul 26, 2025
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14 changes: 10 additions & 4 deletions src/mips/common/hardware/pcsxhw.h
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Original file line number Diff line number Diff line change
Expand Up @@ -39,22 +39,28 @@ static __inline__ void pcsx_initMsan() { *((volatile char* const)0x1f802089) = 0
static __inline__ void pcsx_resetMsan() { *((volatile char* const)0x1f802089) = 1; }
static __inline__ void* pcsx_msanAlloc(uint32_t size) {
register uint32_t a0 asm("a0") = size;
return *((void* volatile* const)0x1f80208c);
void* ret;
__asm__ volatile("lw %0, 0x208c(%1)" : "=r"(ret) : "r"(0x1f800000), "r"(a0));
return ret;
}
static __inline__ void pcsx_msanFree(void* ptr) { *((void* volatile* const)0x1f80208c) = ptr; }
static __inline__ void* pcsx_msanRealloc(void* ptr, uint32_t size) {
register void* a0 asm("a0") = ptr;
register uint32_t a1 asm("a1") = size;
return *((void* volatile* const)0x1f802090);
void* ret;
__asm__ volatile("lw %0, 0x2090(%1)" : "=r"(ret) : "r"(0x1f800000), "r"(a0), "r"(a1));
return ret;
}
static __inline__ void pcsx_msanSetChainPtr(void* headerAddr, void* ptrToNext, uint32_t wordCount) {
register void* a0 asm("a0") = ptrToNext;
register uint32_t a1 asm("a1") = wordCount;
*((void* volatile* const)0x1f802094) = headerAddr;
__asm__ volatile("sw %0, 0x2094(%1)" : : "r"(a0), "r"(0x1f800000), "r"(a1));
}
static __inline__ void* pcsx_msanGetChainPtr(void* headerAddr) {
register void* a0 asm("a0") = headerAddr;
return *((void* volatile* const)0x1f802094);
void* ret;
__asm__ volatile("lw %0, 0x2094(%1)" : "=r"(ret) : "r"(0x1f800000), "r"(a0));
return ret;
}

static __inline__ int pcsx_present() { return *((volatile uint32_t* const)0x1f802080) == 0x58534350; }
3 changes: 1 addition & 2 deletions src/mips/psyqo/examples/pcsxlua/pcsxlua.cpp
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Expand Up @@ -62,8 +62,7 @@ PCSXLuaScene pcsxLuaScene;
void pcsxRegisterVariable(void* address, const char* name) {
register void* a0 asm("a0") = address;
register const char* a1 asm("a1") = name;
__asm__ volatile("" : : "r"(a0), "r"(a1));
*((volatile uint8_t* const)0x1f802081) = 255;
__asm__ volatile("sw %0, 0x2081(%1)" : : "r"(255), "r"(0x1f800000), "r"(a0), "r"(a1));
}

} // namespace
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