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/* $OpenBSD: cons.c,v 1.2 2010/02/16 21:28:39 miod Exp $ */
/*
* Copyright (c) 2010 Miodrag Vallat.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <lib/libkern/libkern.h>
#include "libsa.h"
#include <dev/cons.h>
#include <machine/cpu.h>
#include <machine/pmon.h>
/*
* PMON console
*/
void
pmon_cnprobe(struct consdev *cn)
{
cn->cn_pri = CN_HIGHPRI;
}
void
pmon_cninit(struct consdev *cn)
{
}
int
pmon_cngetc(dev_t dev)
{
/*
* PMON does not give us a getc routine. So try to get a whole line
* and return it char by char, trying not to lose the \n. Kind
* of ugly but should work.
*
* Note that one could theoretically use pmon_read(STDIN, &c, 1)
* but the value of STDIN within PMON is not a constant and there
* does not seem to be a way of letting us know which value to use.
*/
static char buf[1 + PMON_MAXLN];
static char *bufpos = buf;
int c;
if (*bufpos == '\0') {
bufpos = buf;
if (pmon_gets(buf) == NULL) {
/* either an empty line or EOF, assume the former */
strlcpy(buf, "\n", sizeof buf);
} else {
/* put back the \n sign */
buf[strlen(buf)] = '\n';
}
}
c = (int)*bufpos;
if ((dev & 0x80) == 0) {
bufpos++;
if (bufpos - buf > PMON_MAXLN) {
bufpos = buf;
*bufpos = '\0';
}
}
return c;
}
void
pmon_cnputc(dev_t dev, int c)
{
if (c == '\n')
pmon_printf("\n");
else
pmon_printf("%c", c);
}
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