49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* ram_console.c - Console messages to a RAM buffer */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <nanokernel.h>
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#include <misc/printk.h>
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#include <device.h>
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#include <init.h>
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extern void __printk_hook_install(int (*fn)(int));
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extern void __stdout_hook_install(int (*fn)(int));
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/* Extra byte to ensure we're always NULL-terminated */
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char ram_console[CONFIG_RAM_CONSOLE_BUFFER_SIZE + 1];
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static int pos;
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static int ram_console_out(int character)
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{
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ram_console[pos] = (char)character;
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pos = (pos + 1) % CONFIG_RAM_CONSOLE_BUFFER_SIZE;
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return character;
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}
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static int ram_console_init(struct device *d)
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{
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ARG_UNUSED(d);
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__printk_hook_install(ram_console_out);
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__stdout_hook_install(ram_console_out);
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return 0;
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}
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SYS_INIT(ram_console_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
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