1992/0408/pc/devether.c (diff list | history)

1992/0407/sys/src/9/pc/devether.c:32,37 – 1992/0408/sys/src/9/pc/devether.c:32,40 (short | long | prev | next)
1992/0404		NPktype = 9, /* types/interface */ };
1992/0408		#define NEXT(x, l) ((((x)+1)%(l)) == 0 ? 6: (((x)+1)%(l))) #define PREV(x, l) (((x)-1) == 5 ? (l-1): ((x)-1))
1992/0404		/* * register offsets from IObase */
1992/0407/sys/src/9/pc/devether.c:389,394 – 1992/0408/sys/src/9/pc/devether.c:392,398
1992/0404		outb(cp->iobase+Tcr, 0x20); /* LB0 */ outb(cp->iobase+Cr, 0x22); /* Page0, RD2|STA */ cp->ovw = 1;
1992/0408		cp->overflows++;
1992/0404		} /* * we have received packets.
1992/0407/sys/src/9/pc/devether.c:423,430 – 1992/0408/sys/src/9/pc/devether.c:427,434
1992/0404		outb(cp->iobase+Rbcr1, 0); outb(cp->iobase+Rcr, 0x04); /* AB */ outb(cp->iobase+Tcr, 0x20); /* LB0 */ outb(cp->iobase+Bnry, 6); cp->bnry = 6;
1992/0408		outb(cp->iobase+Bnry, cp->bnry);
1992/0407		cp->ring = (Ring*)(KZERO|RAMbase);
1992/0404		outb(cp->iobase+Pstart, 6); /* 6*256 */ outb(cp->iobase+Pstop, 32); /* 8*1024/256 */
1992/0407/sys/src/9/pc/devether.c:434,441 – 1992/0408/sys/src/9/pc/devether.c:438,445
1992/0404		outb(cp->iobase+Cr, 0x61); /* Page1, RD2|STP */ for(i = 0; i < sizeof(cp->ea); i++) outb(cp->iobase+Par0+i, cp->ea[i]); outb(cp->iobase+Curr, 6); /* 6*256 */ cp->curr = 6;
1992/0408		cp->curr = cp->bnry+1; outb(cp->iobase+Curr, cp->curr);
1992/0404		outb(cp->iobase+Cr, 0x22); /* Page0, RD2|STA */ outb(cp->iobase+Tpsr, 0);
1992/0407/sys/src/9/pc/devether.c:449,459 – 1992/0408/sys/src/9/pc/devether.c:453,462
1992/0403		int i;
1992/0404		cp->iobase = IObase; init(cp);
1992/0403		setvec(Ethervec, intr);
1992/0404		for(i = 0; i < sizeof(cp->ea); i++) cp->ea[i] = inb(cp->iobase+EA+i);
1992/0408		init(cp); setvec(Ethervec, intr);
1992/0404		memset(cp->ba, 0xFF, sizeof(cp->ba));
1992/0403
1992/0404		cp->net.name = "ether";
1992/0407/sys/src/9/pc/devether.c:530,536 – 1992/0408/sys/src/9/pc/devether.c:533,539
1992/0403		{
1992/0404		Ctlr *cp = arg;
1992/0403
1992/0404		return cp->bnry != cp->curr;
1992/0408		return NEXT(cp->bnry, 32) != cp->curr;
1992/0403		} static void
1992/0407/sys/src/9/pc/devether.c:558,574 – 1992/0408/sys/src/9/pc/devether.c:561,580
1992/0404		etherup(cp, (Etherpkt*)bp->rptr, BLEN(bp)); freeb(bp); }
1992/0408
1992/0406		/* * process any received packets */
1992/0407		cp->bnry = inb(cp->iobase+Bnry); while(cp->bnry != cp->curr){ rp = &cp->ring[cp->bnry];
1992/0408		bnry = NEXT(cp->bnry, 32); while(bnry != cp->curr){ rp = &cp->ring[bnry];
1992/0406		cp->inpackets++;
1992/0407		etherup(cp, (Etherpkt*)rp->data, ((rp->len1<<8)+rp->len0)-4); cp->bnry = rp->next;
1992/0408		bnry = rp->next; cp->bnry = PREV(bnry, 32);
1992/0407		outb(cp->iobase+Bnry, cp->bnry);
1992/0406		}
1992/0408
1992/0406		/* * if we idled input because of overflow, * restart