forked from luck/tmp_suning_uos_patched
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/*
|
|
* arch/h8300/kernel/early_printk.c
|
|
*
|
|
* Copyright (C) 2009 Yoshinori Sato <ysato@users.sourceforge.jp>
|
|
*
|
|
* 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.
|
|
*/
|
|
#include <linux/console.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
static void sim_write(struct console *co, const char *ptr,
|
|
unsigned len)
|
|
{
|
|
register const int fd __asm__("er0") = 1; /* stdout */
|
|
register const char *_ptr __asm__("er1") = ptr;
|
|
register const unsigned _len __asm__("er2") = len;
|
|
|
|
__asm__(".byte 0x5e,0x00,0x00,0xc7\n\t" /* jsr @0xc7 (sys_write) */
|
|
: : "g"(fd), "g"(_ptr), "g"(_len));
|
|
}
|
|
|
|
static struct console sim_console = {
|
|
.name = "sim_console",
|
|
.write = sim_write,
|
|
.setup = NULL,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
|
|
static char sim_console_buf[32];
|
|
|
|
static int sim_probe(struct platform_device *pdev)
|
|
{
|
|
if (sim_console.data)
|
|
return -EEXIST;
|
|
|
|
if (!strstr(sim_console_buf, "keep"))
|
|
sim_console.flags |= CON_BOOT;
|
|
|
|
register_console(&sim_console);
|
|
return 0;
|
|
}
|
|
|
|
static int sim_remove(struct platform_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver sim_driver = {
|
|
.probe = sim_probe,
|
|
.remove = sim_remove,
|
|
.driver = {
|
|
.name = "h8300-sim",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
early_platform_init_buffer("earlyprintk", &sim_driver,
|
|
sim_console_buf, ARRAY_SIZE(sim_console_buf));
|
|
|
|
static struct platform_device sim_console_device = {
|
|
.name = "h8300-sim",
|
|
.id = 0,
|
|
};
|
|
|
|
static struct platform_device *devices[] __initdata = {
|
|
&sim_console_device,
|
|
};
|
|
|
|
void __init sim_console_register(void)
|
|
{
|
|
early_platform_add_devices(devices,
|
|
ARRAY_SIZE(devices));
|
|
}
|