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  • Committer: Package Import Robot
  • Author(s): Aurelien Jarno
  • Date: 2012-09-16 23:05:23 UTC
  • Revision ID: package-import@ubuntu.com-20120916230523-r2ynulqmp2tyu2e5
Tags: upstream-20120217+dfsg
Import upstream version 20120217+dfsg

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llfw/clib/iolib.c
 
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/******************************************************************************
 
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 * Copyright (c) 2004, 2008 IBM Corporation
 
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 * All rights reserved.
 
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 * This program and the accompanying materials
 
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 * are made available under the terms of the BSD License
 
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 * which accompanies this distribution, and is available at
 
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 * http://www.opensource.org/licenses/bsd-license.php
 
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 *
 
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 * Contributors:
 
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 *     IBM Corporation - initial implementation
 
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 *****************************************************************************/
 
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#include <stdint.h>
 
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#include <stddef.h>
 
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#include <unistd.h>
 
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#include "iolib.h"
 
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void uart_send_byte(unsigned char b)
 
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{
 
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        asm volatile ("":::"3","4","5","6","7");
 
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        io_putchar(b);
 
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}
 
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/**
 
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 * Standard write function for the libc.
 
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 *
 
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 * @param fd    file descriptor (should always be 1 or 2)
 
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 * @param buf   pointer to the array with the output characters
 
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 * @param count number of bytes to be written
 
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 * @return      the number of bytes that have been written successfully
 
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 */
 
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ssize_t write(int fd, const void *buf, size_t count)
 
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{
 
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        size_t i;
 
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        char *ptr = (char *)buf;
 
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        if (fd != 1 && fd != 2)
 
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                return 0;
 
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        for (i = 0; i < count; i++) {
 
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                if (*ptr == '\n')
 
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                        uart_send_byte('\r');
 
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                uart_send_byte(*ptr++);
 
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        }
 
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        return i;
 
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}