-readded protection of mem region for apploader, should be more

safe now and prolly work even better, hopefully as good as with 
the linker script :P
-readded dsp shudown, some games want to have it so the get it

source/loader/apploader.c

@@ -18,9 +18,6 @@ typedef void  (*app_init)(void (*report)(const char *fmt, ...));
 typedef void *(*app_final)();
 typedef void  (*app_entry)(void (**init)(void (*report)(const char *fmt, ...)), int (**main)(), void *(**final)());
 
-/* Apploader pointers */
-static u8 *appldr = (u8 *) 0x81200000;
-
 /* Constants */
 #define APPLDR_OFFSET	0x2440
 
@@ -50,11 +47,15 @@ s32 Apploader_Run(entry_point *entry, u8 vidMode, GXRModeObj *vmode, bool vipatc
 	/* Calculate apploader length */
 	appldr_len = buffer[5] + buffer[6];
 
+	SYS_SetArena1Hi(APPLOADER_END);
+
 	/* Read apploader code */
-	ret = WDVD_Read(appldr, appldr_len, APPLDR_OFFSET + 0x20);
+	ret = WDVD_Read(APPLOADER_START, appldr_len, APPLDR_OFFSET + 0x20);
 	if (ret < 0)
 		return ret;
 
+	DCFlushRange(APPLOADER_START, appldr_len);
+
 	/* Set apploader entry function */
 	app_entry appldr_entry = (app_entry)buffer[4];
 

source/loader/disc.c

@@ -362,10 +362,9 @@ s32 Disc_BootPartition()
 	/* Set an appropriate video mode */
 	__Disc_SetVMode();
 
-	usleep(100 * 1000);
-
 	/* Shutdown IOS subsystems */
 	u32 level = IRQ_Disable();
+	__dsp_shutdown();
 	__IOS_ShutdownSubsystems();
 	__exception_closeall();
 

source/loader/sys.c

@@ -26,6 +26,10 @@ static bool return_to_priiloader = false;
 static bool return_to_disable = false;
 static bool return_to_bootmii = false;
 
+extern void __exception_closeall();
+static vu16* const _dspReg = (u16*)0xCC005000;
+extern u32 __PADDisableRecalibration(s32 disable);
+
 void __Wpad_PowerCallback()
 {
 	/* Poweroff console */
@@ -138,3 +142,23 @@ void Sys_LoadMenu(void)
 	/* Return to the Wii system menu */
 	WII_ReturnToMenu(); //SYS_ResetSystem doesnt work properly with new libogc
 }
+
+void __dsp_shutdown(void)
+{
+	u32 tick;
+
+	_dspReg[5] = (DSPCR_DSPRESET|DSPCR_HALT);
+	_dspReg[27] &= ~0x8000;
+	while(_dspReg[5]&0x400);
+	while(_dspReg[5]&0x200);
+
+	_dspReg[5] = (DSPCR_DSPRESET|DSPCR_DSPINT|DSPCR_ARINT|DSPCR_AIINT|DSPCR_HALT);
+	_dspReg[0] = 0;
+	while((_SHIFTL(_dspReg[2],16,16)|(_dspReg[3]&0xffff))&0x80000000);
+
+	tick = gettick();
+	while((gettick()-tick)<44);
+
+	_dspReg[5] |= DSPCR_RES;
+	while(_dspReg[5]&DSPCR_RES);
+}

source/loader/sys.h

@@ -18,6 +18,17 @@ extern "C" {
 #define EXIT_TO_DISABLE 	4
 #define EXIT_TO_BOOTMII 	5
 
+// DSPCR bits
+#define DSPCR_DSPRESET          0x0800  // Reset DSP
+#define DSPCR_DSPINT            0x0080  // * interrupt active (RWC)
+#define DSPCR_ARINT                     0x0020
+#define DSPCR_AIINT                     0x0008
+#define DSPCR_HALT                      0x0004  // halt DSP
+#define DSPCR_RES                       0x0001  // reset DSP
+
+#define _SHIFTL(v, s, w)        \
+        ((u32) (((u32)(v) & ((0x01 << (w)) - 1)) << (s)))
+
 	/* Prototypes */
 	void Sys_Init(void);
 	void Sys_LoadMenu(void);
@@ -25,7 +36,7 @@ extern "C" {
 	void Sys_Test(void);
 	void Sys_Exit(void);
 	void Sys_ExitTo(int);
-	void Sys_Shutdown(void);
+	void __dsp_shutdown(void);
 
 	void Open_Inputs(void);
 	void Close_Inputs(void);

source/memory/mem2.cpp

@@ -48,6 +48,9 @@ void MEM2_init(unsigned int mem2Size)
 {
 	g_mem2gp.init(mem2Size);
 	g_mem2gp.clear();
+
+	/* Protect space reserved for apploader */
+	SYS_SetArena1Hi(APPLOADER_START);
 }
 
 void MEM2_cleanup(void)