77 struct fifo {  struct
90 	struct fifo	rxfifo;
155 	struct fifo *fifo;  in uart_rxfifo_getchar()  local
159 	fifo = &sc->rxfifo;  in uart_rxfifo_getchar()
160 	if (fifo->num > 0) {  in uart_rxfifo_getchar()
163 		c = fifo->buf[fifo->rindex];  in uart_rxfifo_getchar()
164 		fifo->rindex = (fifo->rindex + 1) % fifo->size;  in uart_rxfifo_getchar()
165 		fifo->num--;  in uart_rxfifo_getchar()
192 	struct fifo *fifo;  in rxfifo_putchar()  local
195 	fifo = &sc->rxfifo;  in rxfifo_putchar()
197 	if (fifo->num < fifo->size) {  in rxfifo_putchar()
198 		fifo->buf[fifo->windex] = ch;  in rxfifo_putchar()
199 		fifo->windex = (fifo->windex + 1) % fifo->size;  in rxfifo_putchar()
200 		fifo->num++;  in rxfifo_putchar()
300 	struct fifo *fifo;  in uart_rxfifo_reset()  local
304 	fifo = &sc->rxfifo;  in uart_rxfifo_reset()
305 	bzero(fifo, sizeof(struct fifo));  in uart_rxfifo_reset()
306 	fifo->size = size;  in uart_rxfifo_reset()