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IOS: Clear 0-0x3fff when setting up low MEM1 constants

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Low MEM1 is cleared by IOS before all the other constants are written.

This will overwrite the Gecko code handler but it should be fine
because HLE::Reload (which will set up the code handler hook again)
will be called after a title change is detected.
This commit is contained in:
Léo Lam 2021-02-25 16:18:58 +01:00
parent be500a98e2
commit 011f7789e0
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GPG Key ID: 0DF30F9081000741
1 changed files with 6 additions and 0 deletions
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6
Source/Core/Core/IOS/IOS.cpp
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@ -137,6 +137,12 @@ static bool SetupMemory(u64 ios_title_id, MemorySetupType setup_type)
return true; return true;
} }
// This region is typically used to store constants (e.g. game ID, console type, ...)
// and system information (see below).
constexpr u32 LOW_MEM1_REGION_START = 0;
constexpr u32 LOW_MEM1_REGION_SIZE = 0x3fff;
Memory::Memset(LOW_MEM1_REGION_START, 0, LOW_MEM1_REGION_SIZE);
Memory::Write_U32(target_imv->mem1_physical_size, ADDR_MEM1_SIZE); Memory::Write_U32(target_imv->mem1_physical_size, ADDR_MEM1_SIZE);
Memory::Write_U32(target_imv->mem1_simulated_size, ADDR_MEM1_SIM_SIZE); Memory::Write_U32(target_imv->mem1_simulated_size, ADDR_MEM1_SIM_SIZE);
Memory::Write_U32(target_imv->mem1_end, ADDR_MEM1_END); Memory::Write_U32(target_imv->mem1_end, ADDR_MEM1_END);