dma.c File Reference

#include <errno.h>
#include <stdio.h>
#include <kernel.h>
#include <libgs.h>
#include "internal.h"

Include dependency graph for dma.c:

Go to the source code of this file.

Data Structures
struct	DMA_CHCR

Macros
#define	gif_chcr   0x1000a000
#define	gif_madr   0x1000a010
#define	gif_qwc   0x1000a020
#define	gif_tadr   0x1000a030
#define	DMA_TAG_REFE   0x00
#define	DMA_TAG_CNT   0x01
#define	DMA_TAG_NEXT   0x02
#define	DMA_TAG_REF   0x03
#define	DMA_TAG_REFS   0x04
#define	DMA_TAG_CALL   0x05
#define	DMA_TAG_RET   0x06
#define	DMA_TAG_END   0x07

Functions
void	GsDmaInit (void)
void	GsDmaSend (const void *addr, u32 qwords)
void	GsDmaSend_tag (const void *addr, u32 qwords, const GS_GIF_DMACHAIN_TAG *tag)
void	GsDmaWait (void)

Macro Definition Documentation

DMA_TAG_CALL

#define DMA_TAG_CALL   0x05

Definition at line 33 of file dma.c.

DMA_TAG_CNT

#define DMA_TAG_CNT   0x01

Definition at line 29 of file dma.c.

DMA_TAG_END

#define DMA_TAG_END   0x07

Definition at line 35 of file dma.c.

DMA_TAG_NEXT

#define DMA_TAG_NEXT   0x02

Definition at line 30 of file dma.c.

DMA_TAG_REF

#define DMA_TAG_REF   0x03

Definition at line 31 of file dma.c.

DMA_TAG_REFE

#define DMA_TAG_REFE   0x00

Definition at line 28 of file dma.c.

DMA_TAG_REFS

#define DMA_TAG_REFS   0x04

Definition at line 32 of file dma.c.

DMA_TAG_RET

#define DMA_TAG_RET   0x06

Definition at line 34 of file dma.c.

gif_chcr

#define gif_chcr   0x1000a000

GIF Channel Control Register

Definition at line 21 of file dma.c.

gif_madr

#define gif_madr   0x1000a010

Transfer Address Register

Definition at line 23 of file dma.c.

gif_qwc

#define gif_qwc   0x1000a020

Transfer Size Register (in qwords)

Definition at line 25 of file dma.c.

gif_tadr

#define gif_tadr   0x1000a030

Definition at line 26 of file dma.c.

Function Documentation

GsDmaInit()

void GsDmaInit

(

void

)

Definition at line 58 of file dma.c.

{
        /* This appears to have been based on code from Sony that initializes DMA channels 0-9, in bulk.
           Reset/init DMA CH 2 (GIF) only. */
        __asm__(
        "li     $2,0x1000A000   \n"
        "sw     $0,0x80($2)             \n" // D2_SADR = 0. Documented to not exist, but is done.
        "sw     $0,0($2)                \n" // D2_CHCR = 0
        "sw     $0,0x30($2)             \n" // D2_TADR = 0
        "sw     $0,0x10($2)             \n" // D2_MADR = 0
        "sw     $0,0x50($2)             \n" // D2_ASR1 = 0
        "sw     $0,0x40($2)             \n" // D2_ASR0 = 0
        "li     $2,0xFF1F               \n" // Clear all interrupt status under D_STAT, other than SIF0, SIF1 & SIF2.
        "sw     $2,0x1000E010   \n"
        "lw     $2,0x1000E010   \n"
        "lui    $3,0xFF1F               \n" // Clear all interrupt masks under D_STAT, other SIF0, SIF1 & SIF2. Writing a 1 reverses the bit.
        "and    $2,$3           \n"
        "sw     $2,0x1000E010   \n"
        "sw     $0,0x1000E000   \n" // D_CTRL = 0
        "sw     $0,0x1000E020   \n" // D_PCR = 0
        "sw     $0,0x1000E030   \n" // D_SQWC = 0
        "sw     $0,0x1000E050   \n" // D_RBOR = 0
        "sw     $0,0x1000E040   \n" // D_RBSR = 0
        "li     $3,1                    \n"
        "lw     $2,0x1000E000   \n"
        "ori    $3,$2,1         \n" // D_CTRL (DMAE 1)
        "sw     $3,0x1000E000   \n"
        );
}

Referenced by GsResetGraph().

GsDmaSend()

void GsDmaSend	(	const void *	addr,
		u32	qwords
	)

Definition at line 88 of file dma.c.

{
        DMA_CHCR                chcr;
        static char             spr;
 
        if((u32)addr >= 0x70000000 && (u32)addr <= 0x70003fff)
        {
                spr = 1;
        }
        else
        {
                spr = 0;
        }
 
        *((vu32 *)(gif_madr)) = ( u32 )((( u32 )addr) & 0x7FFFFFFF) << 0 | (u32)((spr) & 0x00000001) << 31;;
 
        *((vu32 *)(gif_qwc)) = qwords;
 
        chcr.direction  =1;
        chcr.mode               =0;
        chcr.asp                =0;
        chcr.tte                =0;
        chcr.tie                =0;
        chcr.start_flag =1;
        chcr.tag                =0;
        chcr.pad1               =0;
        chcr.pad2               =0;
        *((volatile DMA_CHCR *)(gif_chcr)) = chcr;
}

References DMA_CHCR::asp, DMA_CHCR::direction, gif_chcr, gif_madr, gif_qwc, DMA_CHCR::mode, DMA_CHCR::pad1, DMA_CHCR::pad2, DMA_CHCR::start_flag, DMA_CHCR::tag, DMA_CHCR::tie, and DMA_CHCR::tte.

Referenced by GsClearDrawEnv1(), GsClearDrawEnv2(), GsEnableAlphaBlending1(), GsEnableAlphaBlending2(), GsEnableAlphaTransparency1(), GsEnableAlphaTransparency2(), GsEnableColorClamp(), GsEnableDithering(), GsLoadImage(), GsOverridePrimAttributes(), GsPutZBufferEnv1(), GsPutZBufferEnv2(), GsSelectTexure1(), GsSelectTexure2(), GsSetFogColor(), GsSetFrame1(), GsSetFrame2(), GsSetPixelTest1(), GsSetPixelTest2(), GsSetScissor1(), GsSetScissor2(), GsSetXYOffset1(), GsSetXYOffset2(), and GsTextureFlush().

GsDmaSend_tag()

void GsDmaSend_tag	(	const void *	addr,
		u32	qwords,
		const GS_GIF_DMACHAIN_TAG *	tag
	)

Definition at line 118 of file dma.c.

{
        DMA_CHCR                chcr;
        static char             spr;
 
        if((u32)addr >= 0x70000000 && (u32)addr <= 0x70003fff)
        {
                spr = 1;
        }
        else
        {
                spr = 0;
        }
 
        *((vu32 *)(gif_madr)) = ( u32 )((( u32 )addr) & 0x7FFFFFFF) << 0 | (u32)((spr) & 0x00000001) << 31;
        *((vu32 *)(gif_qwc)) = qwords;
        *((vu32 *)(gif_tadr)) = ( u32 )((( u32 )tag) & 0x7FFFFFFF) << 0 | (u32)((0) & 0x00000001) << 31;
 
        chcr.direction  =1;
        chcr.mode               =1; //chain
        chcr.asp                =0;
        chcr.tte                =0;
        chcr.tie                =0;
        chcr.start_flag =1;
        chcr.tag                =0;
        chcr.pad1               =0;
        chcr.pad2               =0;
        *((volatile DMA_CHCR *)(gif_chcr)) = chcr;
}

References DMA_CHCR::asp, DMA_CHCR::direction, gif_chcr, gif_madr, gif_qwc, gif_tadr, DMA_CHCR::mode, DMA_CHCR::pad1, DMA_CHCR::pad2, DMA_CHCR::start_flag, DMA_CHCR::tag, DMA_CHCR::tie, and DMA_CHCR::tte.

Referenced by GsGifPacketsExecute().

GsDmaWait()

void GsDmaWait

(

void

)

Definition at line 148 of file dma.c.

{
        while(*((vu32 *)(0x1000a000)) & ((u32)1<<8));
}

Referenced by GsClearDrawEnv1(), GsClearDrawEnv2(), GsDrawSync(), GsEnableAlphaBlending1(), GsEnableAlphaBlending2(), GsEnableAlphaTransparency1(), GsEnableAlphaTransparency2(), GsEnableColorClamp(), GsEnableDithering(), GsGifPacketsExecute(), GsLoadImage(), GsOverridePrimAttributes(), GsPutZBufferEnv1(), GsPutZBufferEnv2(), GsSelectTexure1(), GsSelectTexure2(), GsSetFogColor(), GsSetFrame1(), GsSetFrame2(), GsSetPixelTest1(), GsSetPixelTest2(), GsSetScissor1(), GsSetScissor2(), GsSetXYOffset1(), GsSetXYOffset2(), and GsTextureFlush().