#include "config.h"#include "machine.h"#include "serial.h"#include "processor.h"#include <types.h>int getc_errno = 0;__u8 do_getc(vfuncp idler, unsigned long timeout, int *statp){	__u8	c, rxstat;	int	do_timeout = timeout != 0;	getc_errno = 0;	/* reste errno */	while(!SERIAL_CHAR_READY()) {		if (do_timeout) {			if (!timeout)				break;			timeout--;		}		if (idler)			idler();	}	if (do_timeout && timeout == 0) {		c = 0;		rxstat = -1;	} else {		c = SERIAL_READ_CHAR();		rxstat = SERIAL_READ_STATUS();	}	if (rxstat) {		getc_errno = rxstat;		/*printk("RXSTAT error. status = 0x%08lx", rxstat);*/		if (statp)			*statp = rxstat;	}	return (c);}char getc(void){	char c;	unsigned long rxstat;	while (!SERIAL_CHAR_READY()) /* nothing */;	c = SERIAL_READ_CHAR();		rxstat = SERIAL_READ_STATUS();	return c;}void putc(char c){	PROC_SERIAL_PUTC(c);}/* * Reads and returns a character from the serial port *   - Times out after delay iterations checking for presence of character *   - Sets *error_p to UART error bits or - on timeout *   - On timeout, sets *error_p to -1 and returns 0 */char awaitkey(unsigned long delay, int* error_p){	return (do_getc(NULL, delay, error_p));}