eduOS/libkern/stdio.c
2013-11-27 22:49:30 +01:00

66 lines
2.1 KiB
C

/*
* Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <eduos/stdio.h>
#include <eduos/string.h>
#include <eduos/stdarg.h>
#include <eduos/spinlock.h>
#include <asm/vga.h>
static spinlock_irqsave_t olock = SPINLOCK_IRQSAVE_INIT;
int koutput_init(void)
{
#ifdef CONFIG_VGA
vga_init();
#endif
return 0;
}
int kputchar(int c)
{
spinlock_irqsave_lock(&olock);
#ifdef CONFIG_VGA
vga_putchar(c);
#endif
spinlock_irqsave_unlock(&olock);
return 1;
}
int kputs(const char *str)
{
#ifdef CONFIG_VGA
int i;
for(i=0; str[i] != '\0'; i++)
vga_putchar((int) str[i]);
return i;
#else
#endif
}