mirror of https://gitee.com/openkylin/linux.git
47 lines
967 B
C
47 lines
967 B
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* linux/arch/unicore32/kernel/early_printk.c
|
|
*
|
|
* Code specific to PKUnity SoC and UniCore ISA
|
|
*
|
|
* Copyright (C) 2001-2010 GUAN Xue-tao
|
|
*/
|
|
#include <linux/console.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <mach/ocd.h>
|
|
|
|
/* On-Chip-Debugger functions */
|
|
|
|
static void early_ocd_write(struct console *con, const char *s, unsigned n)
|
|
{
|
|
while (*s && n-- > 0) {
|
|
if (*s == '\n')
|
|
ocd_putc((int)'\r');
|
|
ocd_putc((int)*s);
|
|
s++;
|
|
}
|
|
}
|
|
|
|
static struct console early_ocd_console = {
|
|
.name = "earlyocd",
|
|
.write = early_ocd_write,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
|
|
static int __init setup_early_printk(char *buf)
|
|
{
|
|
if (!buf || early_console)
|
|
return 0;
|
|
|
|
early_console = &early_ocd_console;
|
|
if (strstr(buf, "keep"))
|
|
early_console->flags &= ~CON_BOOT;
|
|
else
|
|
early_console->flags |= CON_BOOT;
|
|
register_console(early_console);
|
|
return 0;
|
|
}
|
|
early_param("earlyprintk", setup_early_printk);
|