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/*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Putting things on the screen/serial line using YAMONs facilities.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/serial_reg.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/system.h>
static inline unsigned int serial_in(int offset)
{
return inb(0x3f8 + offset);
}
static inline void serial_out(int offset, int value)
{
outb(value, 0x3f8 + offset);
}
int putPromChar(char c)
{
while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
;
serial_out(UART_TX, c);
return 1;
}
char getPromChar(void)
{
while (!(serial_in(UART_LSR) & 1))
;
return serial_in(UART_RX);
}
void prom_printf(char *fmt, ...)
{
va_list args;
int l;
char *p, *buf_end;
char buf[1024];
va_start(args, fmt);
l = vsprintf(buf, fmt, args); /* hopefully i < sizeof(buf) */
va_end(args);
buf_end = buf + l;
for (p = buf; p < buf_end; p++) {
/* Crude cr/nl handling is better than none */
if (*p == '\n')
putPromChar('\r');
putPromChar(*p);
}
}
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