Add ConfigMem FIRM stuff and GetSystemInfo modes for DDLC

include/kernel/config_mem.hpp

@@ -9,6 +9,13 @@ namespace ConfigMem {
 		SyscoreVer = 0x1FF80010,
 		EnvInfo = 0x1FF80014,
 		AppMemAlloc = 0x1FF80040,
+		FirmUnknown = 0x1FF80060,
+		FirmRevision = 0x1FF80061,
+		FirmVersionMinor = 0x1FF80062,
+		FirmVersionMajor = 0x1FF80063,
+		FirmSyscoreVer = 0x1FF80064,
+		FirmSdkVer = 0x1FF80068,
+
 		HardwareType = 0x1FF81004,
 		Datetime0 = 0x1FF81020,
 		WifiMac = 0x1FF81060,

include/memory.hpp

@@ -139,6 +139,19 @@ private:
 	// Report a retail unit without JTAG
 	static constexpr u32 envInfo = 1;
 
+	// Stored in Configuration Memory starting @ 0x1FF80060 
+	struct FirmwareInfo {
+		u8 unk; // Usually 0 according to 3DBrew
+		u8 revision;
+		u8 minor;
+		u8 major;
+		u32 syscoreVer;
+		u32 sdkVer;
+	};
+
+	// Values taken from 3DBrew and Citra
+	static constexpr FirmwareInfo firm{.unk = 0, .revision = 0, .minor = 0x34, .major = 2, .syscoreVer = 2, .sdkVer = 0x0000F297};
+
 public:
 	u16 kernelVersion = 0;
 	u32 usedUserMemory = u32(0_MB); // How much of the APPLICATION FCRAM range is used (allocated to the appcore)

src/core/kernel/kernel.cpp

@@ -258,6 +258,7 @@ void Kernel::duplicateHandle() {
 
 namespace SystemInfoType {
 	enum : u32 {
+		MemoryInformation = 0,
 		// Gets information related to Citra (We don't implement this, we just report this emulator is not Citra)
 		CitraInformation = 0x20000,
 		// Gets information related to this emulator
@@ -294,6 +295,22 @@ void Kernel::getSystemInfo() {
 
 	regs[0] = Result::Success;
 	switch (infoType) {
+		case SystemInfoType::MemoryInformation: {
+			switch (subtype) {
+				// Total used memory size in the APPLICATION memory region
+				case 1:
+					regs[1] = mem.getUsedUserMem();
+					regs[2] = 0;
+					break;
+
+				default:
+					Helpers::panic("GetSystemInfo: Unknown MemoryInformation subtype %x\n", subtype);
+					regs[0] = Result::FailurePlaceholder;
+					break;
+			}
+			break;
+		}
+
 		case SystemInfoType::CitraInformation: {
 			switch (subtype) {
 				case CitraInfoType::IsCitra:

src/core/memory.cpp

@@ -91,6 +91,12 @@ u8 Memory::read8(u32 vaddr) {
 			case ConfigMem::NetworkState: return 2;  // Report that we've got an internet connection
 			case ConfigMem::HeadphonesConnectedMaybe: return 0;
 			case ConfigMem::Unknown1086: return 1;  // It's unknown what this is but some games want it to be 1
+
+			case ConfigMem::FirmUnknown: return firm.unk;
+			case ConfigMem::FirmRevision: return firm.revision;
+			case ConfigMem::FirmVersionMinor: return firm.minor;
+			case ConfigMem::FirmVersionMajor: return firm.major;
+
 			default: Helpers::panic("Unimplemented 8-bit read, addr: %08X", vaddr);
 		}
 	}
@@ -138,6 +144,8 @@ u32 Memory::read32(u32 vaddr) {
 
 			// 3D slider. Float in range 0.0 = off, 1.0 = max.
 			case ConfigMem::SliderState3D: return Helpers::bit_cast<u32, float>(0.0f);
+			case ConfigMem::FirmUnknown:
+				return u32(read8(vaddr)) | (u32(read8(vaddr + 1)) << 8) | (u32(read8(vaddr + 2)) << 16) | (u32(read8(vaddr + 3)) << 24);
 
 			default:
 				if (vaddr >= VirtualAddrs::VramStart && vaddr < VirtualAddrs::VramStart + VirtualAddrs::VramSize) {