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/* ram_console.c - Console messages to a RAM buffer */ /* * Copyright (c) 2015 Intel Corporation * * SPDX-License-Identifier: Apache-2.0 */ #include <kernel.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, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT); |