Fun with buffers

#include "coreinit.h"

void start()
{
    /* Load a good stack */
    asm(
            "lis %r1, 0x1ab5 ;"
            "ori %r1, %r1, 0xd138 ;"
    );

    /* Get a handle to coreinit.rpl */
    unsigned int coreinit_handle, gx2_handle;
    OSDynLoad_Acquire("coreinit.rpl", &coreinit_handle);
    OSDynLoad_Acquire("gx2.rpl", &gx2_handle);

    void* (*OSAllocFromSystem)(int size, int align);
    void (*DCFlushRange)(void *buffer, int length);
    int (*GX2SetDRCBuffer)(void *buffer, int buffer_size, int variable1, int variable2, int variable3 );
    int (*GX2SetDRCScale)(int x, int y);
    int (*GX2SetDRCEnable)(int bool);

    /* Read the address of OSSetExceptionCallback() */
    OSDynLoad_FindExport(coreinit_handle, 0, "OSAllocFromSystem", &OSAllocFromSystem);
    OSDynLoad_FindExport(coreinit_handle, 0, "DCFlushRange", &DCFlushRange);
    OSDynLoad_FindExport(gx2_handle, 0, "GX2SetDRCBuffer", &GX2SetDRCBuffer);
    OSDynLoad_FindExport(gx2_handle, 0, "GX2SetDRCEnable", &GX2SetDRCEnable);
    OSDynLoad_FindExport(gx2_handle, 0, "GX2SetDRCScale", &GX2SetDRCScale);

    //GX2SetDRCEnable(0);
    //int ret1 = GX2SetDRCScale(20, 20);
    int *buffer = 0xF4000000;
    /*char buffer1[256];
    __os_snprintf(buffer1, 256, "return: %d", buffer);
    OSFatal(buffer1);*/
    /*int i;
    for (i = 0;i < 854*480*2;i++)
    {
        buffer[i] = 0xE100FFFF;
    }
    OSFatal("test");*/
    DCFlushRange(buffer, 854*480*4*2);
    //GX2SetDRCEnable(1);
    int ret2 = GX2SetDRCBuffer(buffer, 854*480*4*2, 2, 0x41a, 1);
}