// hacked by bITmASTER 

// last update 24/06/98



char *SpuDMAWrite( char *addr, int size, int spu_addr )

{

   	volatile unsigned short *spu = (unsigned short *) 0x1f801c00;

   	volatile unsigned int *spuxx = (unsigned int *) 0x1f801014;

   	volatile int *spu_dma = (int *) 0x1f8010c0;

   	

    short d;

    int time_out;

    

	spu[SPU_ADDR] = spu_addr >> 3;

    time_out = 0;

   	while( spu[SPU_ADDR] != ( spu_addr >> 3 ) ) {

   		time_out++;

   		if ( time_out == 3840 ){

   			return( "SPU:T/O wait spu_addr\n" );

   		}

   	}    



   	spu[SPU_CTRL] = ( spu[SPU_CTRL] & 0xffcf ) | 0x20;	// write Block to SPU-Memory via DMA

    time_out = 0;

   	while( ( spu[SPU_CTRL] & 0x30 ) != 0x20 ) {

   		time_out++;

   		if ( time_out == 3840 ){

   			return( "SPU:T/O wait spu_dma_wr\n" );

   		}

   	} 



    *spuxx = ( *spuxx & 0xf0ffffff ) | 0x20000000;   	// ?????

     

	spu_dma[0] = (int) addr;

	d = size / 64;

	if ( size % 64 )

		d++;

		

	spu_dma[1] = ( d << 16 ) | 0x10;    		// 0x10

	spu_dma[3] = 0x01000201;                    // 0x01000201

    



	return( 0 );

}      



int dma_status( void )

{

   	volatile int *spu_dma = (int *) 0x1f8010c0;    

    

	return( ( spu_dma[3] >> 24 ) & 1 );      		// return 0 if dma transfer complete

}

      



char *SpuDMARead( char *addr, int size, int spu_addr )

{

   	volatile unsigned short *spu = (unsigned short *) 0x1f801c00;

   	volatile unsigned int *spuxx = (unsigned int *) 0x1f801014;

   	volatile int *spu_dma = (int *) 0x1f8010c0;

   	

    short d;

    int time_out;

    

	spu[SPU_ADDR] = spu_addr >> 3;

    time_out = 0;

   	while( spu[SPU_ADDR] != ( spu_addr >> 3 ) ) {

   		time_out++;

   		if ( time_out == 3840 ){

   			return( "SPU:T/O wait spu_addr\n" );

   		}

   	}    



   	spu[SPU_CTRL] = ( spu[SPU_CTRL] & 0xffcf ) | 0x30;	// read Block to SPU-Memory via DMA

    time_out = 0;

   	while( ( spu[SPU_CTRL] & 0x30 ) != 0x30 ) {

   		time_out++;

   		if ( time_out == 3840 ){

   			return( "SPU:T/O wait spu_dma_wr\n" );

   		}

   	} 



    *spuxx = ( *spuxx & 0xf0ffffff ) | 0x22000000;   	// ?????



	spu_dma[0] = (int) addr;

	d = size / 64;

	if ( size % 64 )

		d++;

		

	spu_dma[1] = ( d << 16 ) | 0x10;

	spu_dma[3] = 0x01000200;    

    



	return( 0 );

}