mirror of https://gitee.com/openkylin/linux.git
60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2008 David Gibson, IBM Corporation
|
||
|
|
* Copyright (C) 2012 Regents of the University of California
|
||
|
|
* Copyright (C) 2017 SiFive
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/console.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/moduleparam.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
#include <asm/sbi.h>
|
||
|
|
|
||
|
|
#include "hvc_console.h"
|
||
|
|
|
||
|
|
static int hvc_sbi_tty_put(uint32_t vtermno, const char *buf, int count)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < count; i++)
|
||
|
|
sbi_console_putchar(buf[i]);
|
||
|
|
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int hvc_sbi_tty_get(uint32_t vtermno, char *buf, int count)
|
||
|
|
{
|
||
|
|
int i, c;
|
||
|
|
|
||
|
|
for (i = 0; i < count; i++) {
|
||
|
|
c = sbi_console_getchar();
|
||
|
|
if (c < 0)
|
||
|
|
break;
|
||
|
|
buf[i] = c;
|
||
|
|
}
|
||
|
|
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct hv_ops hvc_sbi_ops = {
|
||
|
|
.get_chars = hvc_sbi_tty_get,
|
||
|
|
.put_chars = hvc_sbi_tty_put,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init hvc_sbi_init(void)
|
||
|
|
{
|
||
|
|
return PTR_ERR_OR_ZERO(hvc_alloc(0, 0, &hvc_sbi_ops, 16));
|
||
|
|
}
|
||
|
|
device_initcall(hvc_sbi_init);
|
||
|
|
|
||
|
|
static int __init hvc_sbi_console_init(void)
|
||
|
|
{
|
||
|
|
hvc_instantiate(0, 0, &hvc_sbi_ops);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
console_initcall(hvc_sbi_console_init);
|