1999/0506/alphapc/dma.c (diff list | history)

1999/0505/sys/src/9/alphapc/dma.c:3,9 – 1999/0506/sys/src/9/alphapc/dma.c:3,8 (short | long | prev | next)
1999/0415		#include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" typedef struct DMAport DMAport; typedef struct DMA DMA;
1999/0505/sys/src/9/alphapc/dma.c:63,68 – 1999/0506/sys/src/9/alphapc/dma.c:62,86
1999/0415		1 }, };
1999/0506		static void dmastatus(DMA *dp, int chan, char c) { int a, l, s; ilock(dp); outb(dp->cbp, 0); a = inb(dp->addr[chan]); a |= inb(dp->addr[chan])<<8; a |= inb(dp->page[chan])<<16; a |= inb(0x400|dp->page[chan])<<24; outb(dp->cbp, 0); l = inb(dp->count[chan]); l |= inb(dp->count[chan])<<8; s = inb(dp->cmd); iunlock(dp); print("%c: addr %uX len %uX stat %uX\n", c, a, l, s); }
1999/0415		/* * DMA must be in the first 16MB. This gets called early by the * initialisation routines of any devices which require DMA to ensure
1999/0505/sys/src/9/alphapc/dma.c:73,79 – 1999/0506/sys/src/9/alphapc/dma.c:91,107
1999/0415		{ DMA *dp; DMAxfer *xp;
1999/0506		static int once;
1999/0415
1999/0506		if(once == 0){ outb(dma[0].mc, 0); outb(dma[1].mc, 0); outb(dma[0].cmask, 0); outb(dma[1].cmask, 0); outb(dma[1].mode, 0xC0); once = 1; }
1999/0423		if(maxtransfer > 64*1024) maxtransfer = 64*1024;
1999/0505/sys/src/9/alphapc/dma.c:85,91 – 1999/0506/sys/src/9/alphapc/dma.c:113,119
1999/0423		return 1; return 0;
1999/0415		}
1999/0501		outb(dp->mc, 0);
1999/0506		//dmastatus(dp, chan, 'I');
1999/0423		xp->bva = xspanalloc(maxtransfer, BY2PG, 64*1024); if(xp->bva == nil)
1999/0505/sys/src/9/alphapc/dma.c:107,131 – 1999/0506/sys/src/9/alphapc/dma.c:135,140
1999/0423		return 0;
1999/0415		}
1999/0504		static void
1999/0505		dmastatus(DMA *dp, int chan, char c)
1999/0504		{ int a, l, s;                  ilock(dp); outb(dp->cbp, 0); a = inb(dp->addr[chan]); a |= inb(dp->addr[chan])<<8; a |= inb(dp->page[chan])<<16; a |= inb(0x400|dp->page[chan])<<24; outb(dp->cbp, 0); l = inb(dp->count[chan]); l |= inb(dp->count[chan])<<8; s = inb(dp->cmd); iunlock(dp);
1999/0505		print("%c: addr %uX len %uX stat %uX\n", c, a, l, s);
1999/0504		}                  void xdmastatus(int chan) {
1999/0505/sys/src/9/alphapc/dma.c:159,164 – 1999/0506/sys/src/9/alphapc/dma.c:168,176
1999/0415		chan = chan & 3;
1999/0501		//print("va%lux+", va); #define tryPCI
1999/0506		#ifndef PCIWADDR #define PCIWADDR(va) PADDR(va) #endif /* PCIWADDR */
1999/0501		#ifdef notdef
1999/0415		xp = &dp->x[chan];
1999/0505/sys/src/9/alphapc/dma.c:209,215 – 1999/0506/sys/src/9/alphapc/dma.c:221,227
1999/0415		outb(dp->count[chan], ((len>>dp->shift)-1)>>8); outb(dp->sbm, chan); /* enable the channel */ iunlock(dp);
1999/0505		dmastatus(dp, chan, 'S');
1999/0506		//dmastatus(dp, chan, 'S');
1999/0415		return len; }
1999/0505/sys/src/9/alphapc/dma.c:241,247 – 1999/0506/sys/src/9/alphapc/dma.c:253,259
1999/0415		dp = &dma[(chan>>2)&1]; chan = chan & 3;
1999/0505		dmastatus(dp, chan, 'E');
1999/0506		//dmastatus(dp, chan, 'E');
1999/0415		/* * disable the channel */