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/* ram_console.c - Console messages to a RAM buffer */
/*
* Copyright (c) 2015 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <nanokernel.h>
#include <misc/printk.h>
#include <device.h>
#include <init.h>
extern void __printk_hook_install(int (*fn)(int));
extern void __stdout_hook_install(int (*fn)(int));
/* Extra byte to ensure we're always NULL-terminated */
char ram_console[CONFIG_RAM_CONSOLE_BUFFER_SIZE + 1];
static int pos;
static int ram_console_out(int character)
{
ram_console[pos] = (char)character;
pos = (pos + 1) % CONFIG_RAM_CONSOLE_BUFFER_SIZE;
return character;
}
static int ram_console_init(struct device *d)
{
ARG_UNUSED(d);
__printk_hook_install(ram_console_out);
__stdout_hook_install(ram_console_out);
return 0;
}
SYS_INIT(ram_console_init, PRIMARY, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
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