1999/0123/mpc/devuart.c (diff list | history)

1999/0122/sys/src/9/mpc/devuart.c:297,303 – 1999/0123/sys/src/9/mpc/devuart.c:297,303 (short | long | prev | next)
1999/0122		smc->smcm = BSY|RXB|TXB; /* enable all possible interrupts */ up->smc = smc; smc->smcmr = ((1+8+1-1)<<11)|(2<<4); /* 8-bit, 1 stop, no parity; UART mode */ // intrenable(VectorCPIC+4, smcuintr, up, BUSUNKNOWN);
1999/0123		intrenable(VectorCPIC+4, smcuintr, up, BUSUNKNOWN);
1999/0122		smc->smcmr |= 3; /* enable rx/tx */ }
1999/0122/sys/src/9/mpc/devuart.c:763,772 – 1999/0123/sys/src/9/mpc/devuart.c:763,774
1999/0122		txstart(Uart *p) { Block *b; int n, flags;
1999/0123		int n, flags, s;
1999/0122
1999/0123
1999/0122		if(!p->cts || p->blocked || p->txb->status & BDReady) return;
1999/0123
1999/0122		if((b = p->outb) == nil){ if((b = qget(p->oq)) == nil) return;
1999/0122/sys/src/9/mpc/devuart.c:785,792 – 1999/0123/sys/src/9/mpc/devuart.c:787,794
1999/0122		} } n = BLEN(b); if(n <= 0) print("txstart: 0\n");
1999/0123		// if(n <= 0) // print("txstart: 0\n");
1999/0122		if(p->bpc > 8){ /* half-word alignment and length if chars are long */ if(PADDR(b->rp)&1){ /* must be even if chars are long */
1999/0122/sys/src/9/mpc/devuart.c:810,820 – 1999/0123/sys/src/9/mpc/devuart.c:812,819
1999/0122		p->txb->addr = PADDR(b->rp); p->txb->length = n; eieio(); p->txb->status = (p->txb->status & BDWrap) | flags | BDReady/*|BDInt */;
1999/0123		p->txb->status = (p->txb->status & BDWrap) | flags | BDReady | BDInt;
1999/0122		eieio();                  while(p->txb->status & BDReady) flash(); } /*
1999/0122/sys/src/9/mpc/devuart.c:991,1001 – 1999/0123/sys/src/9/mpc/devuart.c:990,1000
1999/0122		int dokick; BD *bd; Block *b;                  if(events & BSY) p->overrun++; p->interrupts++; dokick = 0;
1999/0123		/*
1999/0122		while(p->rxb != nil && ((bd = &p->rxb[p->rdrx])->status & BDEmpty) == 0){ if(p->mode) framedinput(p, bd);
1999/0122/sys/src/9/mpc/devuart.c:1006,1011 – 1999/0123/sys/src/9/mpc/devuart.c:1005,1011
1999/0122		bd->status = (bd->status & BDWrap) | BDEmpty|BDInt; p->rdrx ^= 1; }
1999/0123		*/
1999/0122		if((bd = p->txb) != nil){ if((bd->status & BDReady) == 0){ ilock(&p->plock);