12c7a35ee6
Completely unused. Signed-off-by: David S. Miller <davem@davemloft.net>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
|
|
* console.c: Routines that deal with sending and receiving IO
|
|
* to/from the current console device using the PROM.
|
|
*
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1998 Pete Zaitcev <zaitcev@yahoo.com>
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/openprom.h>
|
|
#include <asm/oplib.h>
|
|
#include <asm/system.h>
|
|
#include <linux/string.h>
|
|
|
|
extern void restore_current(void);
|
|
|
|
/* Non blocking put character to console device, returns -1 if
|
|
* unsuccessful.
|
|
*/
|
|
static int prom_nbputchar(const char *buf)
|
|
{
|
|
unsigned long flags;
|
|
int i = -1;
|
|
|
|
spin_lock_irqsave(&prom_lock, flags);
|
|
switch(prom_vers) {
|
|
case PROM_V0:
|
|
i = (*(romvec->pv_nbputchar))(*buf);
|
|
break;
|
|
case PROM_V2:
|
|
case PROM_V3:
|
|
if ((*(romvec->pv_v2devops).v2_dev_write)(*romvec->pv_v2bootargs.fd_stdout,
|
|
buf, 0x1) == 1)
|
|
i = 0;
|
|
break;
|
|
default:
|
|
break;
|
|
};
|
|
restore_current();
|
|
spin_unlock_irqrestore(&prom_lock, flags);
|
|
return i; /* Ugh, we could spin forever on unsupported proms ;( */
|
|
}
|
|
|
|
/* Blocking version of put character routine above. */
|
|
void prom_putchar(const char *buf)
|
|
{
|
|
while (1) {
|
|
int err = prom_nbputchar(buf);
|
|
if (!err)
|
|
break;
|
|
}
|
|
}
|