Add code for identifying the current DSP ucode

Doesn't do much here, at most it provides some debug info
Lays a very shallow foundation for any potential DSP HLE

src/CMakeLists.txt

@@ -20,6 +20,7 @@ add_library(core STATIC
     DSi_AES.cpp
     DSi_Camera.cpp
     DSi_DSP.cpp
+    DSi_DSP_UCodes.cpp
     DSi_I2C.cpp
     DSi_NAND.cpp
     DSi_NDMA.cpp

src/DSi_DSP.cpp

@@ -20,6 +20,7 @@
 
 #include "DSi.h"
 #include "DSi_DSP.h"
+#include "DSi_DSP_UCodes.h"
 #include "FIFO.h"
 #include "NDS.h"
 #include "Platform.h"
@@ -113,6 +114,7 @@ DSi_DSP::DSi_DSP(melonDS::DSi& dsi) : DSi(dsi)
 
     TeakraCore = new Teakra::Teakra();
     SCFG_RST = false;
+    CurrentUCodeID = UCodeID::UNKNOWN;
 
     // ????
     //if (!TeakraCore) return false;
@@ -188,6 +190,11 @@ bool DSi_DSP::IsRstReleased() const
 }
 void DSi_DSP::SetRstLine(bool release)
 {
+    if (!SCFG_RST && release)
+    {
+        CurrentUCodeID = IdentifyUCode(DSi);
+    }
+
     SCFG_RST = release;
     Reset();
     DSPTimestamp = DSi.ARM9Timestamp; // only start now!

src/DSi_DSP.h

@@ -30,6 +30,7 @@ namespace Teakra { class Teakra; }
 namespace melonDS
 {
 class DSi;
+enum class UCodeID;
 class DSi_DSP
 {
 public:
@@ -74,6 +75,7 @@ private:
     u16 SNDExCnt;
 
     Teakra::Teakra* TeakraCore;
+    UCodeID CurrentUCodeID;
 
     bool SCFG_RST;
 

src/DSi_DSP_UCodes.cpp

@@ -0,0 +1,95 @@
+/*
+    Copyright 2016-2024 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#include "DSi.h"
+#include "DSi_DSP_UCodes.h"
+#include "CRC32.h"
+#include "Platform.h"
+
+namespace melonDS
+{
+using Platform::Log;
+using Platform::LogLevel;
+
+// static block of zero'd memory for unmapped DSP memory
+static const u8 DSPZeroPage[0x8000] = {};
+
+UCodeID IdentifyUCode(melonDS::DSi& dsi)
+{
+    u32 crc = 0;
+
+    // Hash NWRAM B, which contains the DSP program
+    // The hash should be in the DSP's memory view
+    for (u32 addr = 0; addr < 0x40000; addr += 0x8000)
+    {
+        const u8* ptr = dsi.NWRAMMap_B[2][(addr >> 15) & 0x7];
+        if (!ptr) ptr = DSPZeroPage;
+        crc = CRC32(ptr, 0x8000, crc);
+    }
+
+    switch (crc)
+    {
+        case 0x7867C94B:
+            Log(LogLevel::Debug, "Identified AAC Sound App DSP UCode\n");
+            return UCodeID::AAC_SOUND_APP;
+        case 0x0CAFEF48:
+            Log(LogLevel::Debug, "Identified AAC SDK v0 DSP UCode\n");
+            return UCodeID::AAC_SDK_V0;
+        case 0xCD2A8B1B:
+            Log(LogLevel::Debug, "Identified Graphics SDK v0 DSP UCode\n");
+            return UCodeID::GRAPHICS_SDK_V0;
+        case 0x7EEE19FE:
+            Log(LogLevel::Debug, "Identified G711 SDK v1 DSP UCode\n");
+            return UCodeID::G711_SDK_V1;
+        case 0x7323B75B:
+            Log(LogLevel::Debug, "Identified Graphics SDK v1 DSP UCode\n");
+            return UCodeID::GRAPHICS_SDK_V1;
+        case 0xBD4B63B6:
+            Log(LogLevel::Debug, "Identified Graphics SDK v1 Patch DSP UCode\n");
+            return UCodeID::GRAPHICS_SDK_V1_PATCH;
+        case 0x6056C6FF:
+            Log(LogLevel::Debug, "Identified G711 SDK v2 DSP UCode\n");
+            return UCodeID::G711_SDK_V2;
+        case 0x448BB6A2:
+            Log(LogLevel::Debug, "Identified Graphics SDK v2 DSP UCode\n");
+            return UCodeID::GRAPHICS_SDK_V2;
+        case 0x2C281DAE:
+            Log(LogLevel::Debug, "Identified G711 SDK v3 DSP UCode\n");
+            return UCodeID::G711_SDK_V3;
+        case 0x63CAEC33:
+            Log(LogLevel::Debug, "Identified Graphics SDK v3 DSP UCode\n");
+            return UCodeID::GRAPHICS_SDK_V3;
+        case 0x2A1D7F94:
+            Log(LogLevel::Debug, "Identified G711 SDK v4 DSP UCode\n");
+            return UCodeID::G711_SDK_V4;
+        case 0x1451EB84:
+            Log(LogLevel::Debug, "Identified Graphics SDK v4 DSP UCode\n");
+            return UCodeID::GRAPHICS_SDK_V4;
+        case 0x4EBEB519:
+            Log(LogLevel::Debug, "Identified G711 SDK v5 DSP UCode\n");
+            return UCodeID::G711_SDK_V5;
+        case 0x2C974FC8:
+            Log(LogLevel::Debug, "Identified Graphics SDK v5 DSP UCode\n");
+            return UCodeID::GRAPHICS_SDK_V5;
+        default:
+            Log(LogLevel::Debug, "Unknown DSP UCode (CRC = %08X)\n", crc);
+            return UCodeID::UNKNOWN;
+    }
+}
+
+}

src/DSi_DSP_UCodes.h

@@ -0,0 +1,103 @@
+/*
+    Copyright 2016-2024 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef DSI_DSP_UCODES_H
+#define DSI_DSP_UCODES_H
+
+namespace melonDS
+{
+class DSi;
+
+// DSP ucodes are COFF files embed into the DSi ROM in some fashion
+// DSP ucodes all appear to simply be from the DSi's SDK (as evidenced by the build paths in the COFF)
+// Presumingly, developers could not actually make their own ucodes, that was reserved for Nintendo
+enum class UCodeID
+{
+    // AAC decoder in DSi Sound app
+    // COFF build timestamp: 8/4/2008
+    // This appears to be from an extremely early version of the DSi's SDK
+    // This SDK was presumingly never available to 3rd party developers, as the build timestamp is before the DSi's release
+    // As such, nothing else appears to use this ucode
+    AAC_SOUND_APP,
+
+    // AAC decoder present in v0 SDK
+    // COFF build timestamp: 10/21/2008
+    // At least 1 DSiWare app (Futo Sutando Tsuki - Banbura DX Rajio) is known to contain this
+    AAC_SDK_V0,
+
+    // Graphics ucode present in v0 SDK
+    // COFF build timestamp: 10/21/2008
+    // As least 1 DSiWare app (Hobonichi Rosenzu 2010, rev 0) is known to contain this
+    GRAPHICS_SDK_V0,
+
+    // G711 encoder/decoder present in v1 SDK
+    // COFF build timestamp: 2/13/2009
+    // Appears to be a replacement for the AAC decoder
+    G711_SDK_V1,
+
+    // Graphics ucode present in v1 SDK
+    // COFF build timestamp: 2/13/2009
+    GRAPHICS_SDK_V1,
+
+    // Graphics ucode present in v1 SDK
+    // COFF build timestamp: 4/3/2009
+    // Appears to be a patch against the previous graphics ucode
+    // Known to sometimes be present alongside the SDK v1 G711 ucode
+    GRAPHICS_SDK_V1_PATCH,
+
+    // G711 encoder/decoder present in v2 SDK
+    // COFF build timestamp: 4/8/2009
+    G711_SDK_V2,
+
+    // Graphics ucode present in v2 SDK
+    // COFF build timestamp: 4/8/2009
+    GRAPHICS_SDK_V2,
+
+    // G711 encoder/decoder present in v3 SDK
+    // COFF build timestamp: 9/16/2009
+    G711_SDK_V3,
+
+    // Graphics ucode present in v3 SDK
+    // COFF build timestamp: 9/16/2009
+    GRAPHICS_SDK_V3,
+
+    // G711 encoder/decoder present in v4 SDK
+    // COFF build timestamp: 11/9/2009
+    G711_SDK_V4,
+
+    // Graphics ucode present in v4 SDK
+    // COFF build timestamp: 11/9/2009
+    GRAPHICS_SDK_V4,
+
+    // G711 encoder/decoder present in v5 SDK
+    // COFF build timestamp: 1/13/2010
+    G711_SDK_V5,
+
+    // Graphics ucode present in v5 SDK
+    // COFF build timestamp: 1/13/2010
+    GRAPHICS_SDK_V5,
+
+    // Unknown ucode...
+    UNKNOWN = -1,
+};
+
+UCodeID IdentifyUCode(melonDS::DSi& dsi);
+
+}
+
+#endif // DSI_DSP_UCODES_H