1999/0424/alphapc/dma.c (diff list | history)

1999/0424/sys/src/9/alphapc/dma.c:85,90 – 1999/0501/sys/src/9/alphapc/dma.c:85,91 (short | long | prev | next)
1999/0423		return 1; return 0;
1999/0415		}
1999/0501		outb(dp->mc, 0);
1999/0423		xp->bva = xspanalloc(maxtransfer, BY2PG, 64*1024); if(xp->bva == nil)
1999/0424/sys/src/9/alphapc/dma.c:126,131 – 1999/0501/sys/src/9/alphapc/dma.c:127,135
1999/0415		dp = &dma[(chan>>2)&1]; chan = chan & 3;
1999/0501		//print("va%lux+", va); #define tryPCI #ifdef notdef
1999/0415		xp = &dp->x[chan]; /*
1999/0424/sys/src/9/alphapc/dma.c:132,139 – 1999/0501/sys/src/9/alphapc/dma.c:136,141
1999/0415		* if this isn't kernel memory or crossing 64k boundary or above 16 meg
1999/0423		* use the bounce buffer.
1999/0415		*/
1999/0424		print("va%lux+", va);
1999/0423		#ifdef notdef
1999/0415		pa = PADDR(va); if((((ulong)va)&0xF0000000) != KZERO || (pa&0xFFFF0000) != ((pa+len)&0xFFFF0000)
1999/0424/sys/src/9/alphapc/dma.c:151,159 – 1999/0501/sys/src/9/alphapc/dma.c:153,165
1999/0415		} else xp->len = 0;
1999/0423		#else
1999/0424		pa = ISAWADDR(va);
1999/0423		#endif /* notdef */
1999/0501		#ifdef tryISA pa = ISAWADDR(va); #endif /* tryISA */ #ifdef tryPCI pa = PCIWADDR(va); #endif /* tryPCI */
1999/0415		/* * this setup must be atomic
1999/0424/sys/src/9/alphapc/dma.c:165,176 – 1999/0501/sys/src/9/alphapc/dma.c:171,184
1999/0415		outb(dp->addr[chan], pa>>dp->shift); /* set address */ outb(dp->addr[chan], pa>>(8+dp->shift));
1999/0423		outb(dp->page[chan], pa>>16);
1999/0424		//outb(0x400|dp->page[chan], pa>>24);
1999/0501		#ifdef tryPCI outb(0x400|dp->page[chan], pa>>24); #endif /* tryPCI */
1999/0415		outb(dp->count[chan], (len>>dp->shift)-1); /* set count */ outb(dp->count[chan], ((len>>dp->shift)-1)>>8); outb(dp->sbm, chan); /* enable the channel */ iunlock(dp);
1999/0424		print("pa%lux+", pa);
1999/0501		//print("pa%lux+", pa);
1999/0415		return len; }
1999/0424/sys/src/9/alphapc/dma.c:215,221 – 1999/0501/sys/src/9/alphapc/dma.c:223,229
1999/0424		i |= inb(dp->addr[chan])<<8; i |= inb(dp->page[chan])<<16; i |= inb(0x400|dp->page[chan])<<24; print("X%uX+", i);
1999/0501		//print("X%uX+", i);
1999/0424		}
1999/0415		xp = &dp->x[chan];