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G2-EXT2 DMA channel

This commit is contained in:
Flyinghead 2018-09-21 18:27:45 +02:00
parent 6e017fd3ef
commit 3c60d4745c
1 changed files with 44 additions and 0 deletions
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44
core/hw/aica/aica_if.cpp
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@ -305,6 +305,48 @@ void Write_SB_E1ST(u32 addr, u32 data)
}
}
void Write_SB_E2ST(u32 addr, u32 data)
{
if ((data & 1) && (SB_E2EN & 1))
{
u32 src=SB_E2STAR;
u32 dst=SB_E2STAG;
u32 len=SB_E2LEN & 0x7FFFFFFF;
if (SB_E2DIR==1)
{
u32 t=src;
src=dst;
dst=t;
printf("G2-EXT2 DMA : SB_E2DIR==1 DMA Read to 0x%X from 0x%X %d bytes\n",dst,src,len);
}
else
printf("G2-EXT2 DMA : SB_E2DIR==0:DMA Write to 0x%X from 0x%X %d bytes\n",dst,src,len);
WriteMemBlock_nommu_dma(dst,src,len);
if (SB_E2LEN & 0x80000000)
SB_E2EN=1;
else
SB_E2EN=0;
SB_E2STAR+=len;
SB_E2STAG+=len;
SB_E2ST = 0x00000000;//dma done
SB_E2LEN = 0x00000000;
asic_RaiseInterrupt(holly_EXT_DMA2);
}
}
void Write_SB_DDST(u32 addr, u32 data)
{
if (data & 1)
die("SB_DDST DMA not implemented");
}
void aica_sb_Init()
{
//NRM
@ -317,6 +359,8 @@ void aica_sb_Init()
//THIS IS NOT AICA, its G2-EXT (BBA)
sb_rio_register(SB_E1ST_addr,RIO_WF,0,&Write_SB_E1ST);
sb_rio_register(SB_E2ST_addr,RIO_WF,0,&Write_SB_E2ST);
sb_rio_register(SB_DDST_addr,RIO_WF,0,&Write_SB_DDST);
//sb_regs[((SB_E1ST_addr-SB_BASE)>>2)].flags=REG_32BIT_READWRITE | REG_READ_DATA;
//sb_regs[((SB_E1ST_addr-SB_BASE)>>2)].writeFunction=Write_SB_E1ST;