gspgpu: fix const correctness issues

libctru/include/3ds/services/gspgpu.h

@@ -156,7 +156,7 @@ GSPGPU_Event gspWaitForAnyEvent(void);
  * @brief Submits a GX command.
  * @param gxCommand GX command to execute.
  */
-Result gspSubmitGxCommand(u32 gxCommand[0x8]);
+Result gspSubmitGxCommand(const u32 gxCommand[0x8]);
 
 /**
  * @brief Acquires GPU rights.
@@ -171,7 +171,7 @@ Result GSPGPU_ReleaseRight(void);
  * @brief Retrieves display capture info.
  * @param captureinfo Pointer to output capture info to.
  */
-Result GSPGPU_ImportDisplayCaptureInfo(GSPGPU_CaptureInfo*captureinfo);
+Result GSPGPU_ImportDisplayCaptureInfo(GSPGPU_CaptureInfo* captureinfo);
 
 /// Saves the VRAM sys area.
 Result GSPGPU_SaveVramSysArea(void);
@@ -193,7 +193,7 @@ Result GSPGPU_SetLcdForceBlack(u8 flags);
  * @param screenid ID of the screen to update.
  * @param framebufinfo Framebuffer information to update with.
  */
-Result GSPGPU_SetBufferSwap(u32 screenid, GSPGPU_FramebufferInfo*framebufinfo);
+Result GSPGPU_SetBufferSwap(u32 screenid, const GSPGPU_FramebufferInfo* framebufinfo);
 
 /**
  * @brief Flushes memory from the data cache.
@@ -215,7 +215,7 @@ Result GSPGPU_InvalidateDataCache(const void* adr, u32 size);
  * @param data Data to write.
  * @param size Size of the data to write.
  */
-Result GSPGPU_WriteHWRegs(u32 regAddr, u32* data, u8 size);
+Result GSPGPU_WriteHWRegs(u32 regAddr, const u32* data, u8 size);
 
 /**
  * @brief Writes to GPU hardware registers with a mask.
@@ -225,7 +225,7 @@ Result GSPGPU_WriteHWRegs(u32 regAddr, u32* data, u8 size);
  * @param maskdata Data of the mask.
  * @param masksize Size of the mask.
  */
-Result GSPGPU_WriteHWRegsWithMask(u32 regAddr, u32* data, u8 datasize, u32* maskdata, u8 masksize);
+Result GSPGPU_WriteHWRegsWithMask(u32 regAddr, const u32* data, u8 datasize, const u32* maskdata, u8 masksize);
 
 /**
  * @brief Reads from GPU hardware registers.

libctru/source/services/gspgpu.c

@@ -297,7 +297,7 @@ GSPGPU_Event gspWaitForAnyEvent(void)
 	return (GSPGPU_Event)x;
 }
 
-static int popInterrupt()
+static int popInterrupt(void)
 {
 	int curEvt;
 	bool strexFailed;
@@ -379,7 +379,7 @@ void gspEventThreadMain(void *arg)
 //essentially : get commandIndex and totalCommands, calculate offset of new command, copy command and update totalCommands
 //use LDREX/STREX because this data may also be accessed by the GSP module and we don't want to break stuff
 //(mostly, we could overwrite the buffer header with wrong data and make the GSP module reexecute old commands)
-Result gspSubmitGxCommand(u32 gxCommand[0x8])
+Result gspSubmitGxCommand(const u32 gxCommand[0x8])
 {
 	u32* sharedGspCmdBuf = (u32*)((u8*)gspSharedMem + 0x800 + gspThreadId*0x200);
 	u32 cmdBufHeader = __ldrex((s32*)sharedGspCmdBuf);
@@ -410,7 +410,7 @@ Result gspSubmitGxCommand(u32 gxCommand[0x8])
 	return 0;
 }
 
-Result GSPGPU_WriteHWRegs(u32 regAddr, u32* data, u8 size)
+Result GSPGPU_WriteHWRegs(u32 regAddr, const u32* data, u8 size)
 {
 	if(size>0x80 || !data)return -1;
 
@@ -427,7 +427,7 @@ Result GSPGPU_WriteHWRegs(u32 regAddr, u32* data, u8 size)
 	return cmdbuf[1];
 }
 
-Result GSPGPU_WriteHWRegsWithMask(u32 regAddr, u32* data, u8 datasize, u32* maskdata, u8 masksize)
+Result GSPGPU_WriteHWRegsWithMask(u32 regAddr, const u32* data, u8 datasize, const u32* maskdata, u8 masksize)
 {
 	if(datasize>0x80 || !data)return -1;
 
@@ -463,7 +463,7 @@ Result GSPGPU_ReadHWRegs(u32 regAddr, u32* data, u8 size)
 	return cmdbuf[1];
 }
 
-Result GSPGPU_SetBufferSwap(u32 screenid, GSPGPU_FramebufferInfo*framebufinfo)
+Result GSPGPU_SetBufferSwap(u32 screenid, const GSPGPU_FramebufferInfo*framebufinfo)
 {
 	u32 *cmdbuf = getThreadCommandBuffer();
 
@@ -590,7 +590,7 @@ Result GSPGPU_ReleaseRight(void)
 	return cmdbuf[1];
 }
 
-Result GSPGPU_ImportDisplayCaptureInfo(GSPGPU_CaptureInfo*captureinfo)
+Result GSPGPU_ImportDisplayCaptureInfo(GSPGPU_CaptureInfo* captureinfo)
 {
 	u32* cmdbuf=getThreadCommandBuffer();
 	cmdbuf[0]=IPC_MakeHeader(0x18,0,0); // 0x180000