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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 DEV_OK; } SYS_INIT(ram_console_init, PRIMARY, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT); |