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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1996 David S. Miller (dm@sgi.com)
* Compability with board caches, Ulf Carlsson
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <asm/sgialib.h>
#include <asm/bcache.h>
#include <linux/console.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#ifdef CONFIG_ARC_CONSOLE
#define __init
#endif
/*
* IP22 boardcache is not compatible with board caches. Thus we disable it
* during romvec action. Since r4xx0.c is always compiled and linked with your
* kernel, this shouldn't cause any harm regardless what MIPS processor you
* have.
*
* The ARC write and read functions seem to interfere with the serial lines
* in some way. You should be careful with them.
*/
void __init prom_putchar(char c)
{
long cnt;
char it = c;
bc_disable();
romvec->write(1, &it, 1, &cnt);
bc_enable();
}
char __init prom_getchar(void)
{
long cnt;
char c;
bc_disable();
romvec->read(0, &c, 1, &cnt);
bc_enable();
return c;
}
static char ppbuf[1024];
void __init prom_printf(char *fmt, ...)
{
va_list args;
char ch, *bptr;
int i;
va_start(args, fmt);
i = vsprintf(ppbuf, fmt, args);
bptr = ppbuf;
while ((ch = *(bptr++)) != 0) {
if (ch == '\n')
prom_putchar('\r');
prom_putchar(ch);
}
va_end(args);
}
static void
arc_console_write(struct console *con, const char *s, unsigned n)
{
prom_printf("%s", s);
}
static kdev_t
arc_console_dev(struct console *c)
{
return MKDEV(TTY_MAJOR, 64 + c->index);
}
static struct console arc_prom_console = {
name: "prom",
write: arc_console_write,
device: arc_console_dev,
flags: CON_PRINTBUFFER,
index: -1,
};
__init void arc_setup_console(void)
{
register_console(&arc_prom_console);
}
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