1 /* 2 * Copyright (c) 2020 Intel Corporation 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #include <zephyr/kernel.h> 8 #include <zephyr/init.h> 9 #include <zephyr/device.h> 10 #include <zephyr/version.h> 11 12 #if defined(CONFIG_BOOT_DELAY) && (CONFIG_BOOT_DELAY > 0) 13 #define DELAY_STR STRINGIFY(CONFIG_BOOT_DELAY) 14 #define BANNER_POSTFIX " (delayed boot " DELAY_STR "ms)" 15 #else 16 #define BANNER_POSTFIX "" 17 #endif /* defined(CONFIG_BOOT_DELAY) && (CONFIG_BOOT_DELAY > 0) */ 18 19 #ifndef BANNER_VERSION 20 #if defined(BUILD_VERSION) && !IS_EMPTY(BUILD_VERSION) 21 #define BANNER_VERSION STRINGIFY(BUILD_VERSION) 22 #else 23 #define BANNER_VERSION KERNEL_VERSION_STRING 24 #endif /* BUILD_VERSION */ 25 #endif /* !BANNER_VERSION */ 26 boot_banner(void)27void boot_banner(void) 28 { 29 #if defined(CONFIG_BOOT_DELAY) && (CONFIG_BOOT_DELAY > 0) 30 #ifdef CONFIG_BOOT_BANNER 31 printk("***** delaying boot " DELAY_STR "ms (per build configuration) *****\n"); 32 #endif /* CONFIG_BOOT_BANNER */ 33 k_busy_wait(CONFIG_BOOT_DELAY * USEC_PER_MSEC); 34 #endif /* defined(CONFIG_BOOT_DELAY) && (CONFIG_BOOT_DELAY > 0) */ 35 36 #if defined(CONFIG_BOOT_CLEAR_SCREEN) 37 /* \x1b[ = escape sequence 38 * 3J = erase scrollback 39 * 2J = erase screen 40 * H = move cursor to top left 41 */ 42 printk("\x1b[3J\x1b[2J\x1b[H"); 43 #endif /* CONFIG_BOOT_CLEAR_SCREEN */ 44 45 #ifdef CONFIG_BOOT_BANNER 46 printk("*** " CONFIG_BOOT_BANNER_STRING " " BANNER_VERSION BANNER_POSTFIX " ***\n"); 47 #endif /* CONFIG_BOOT_BANNER */ 48 } 49
