| /* |
| * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| /* |
| * If a platform wishes to use the functions in this file it has to be added to |
| * the Makefile of the platform. It is not included in the common Makefile. |
| */ |
| |
| #include <asm_macros.S> |
| #include <drivers/console.h> |
| |
| .globl plat_crash_console_init |
| .globl plat_crash_console_putc |
| .globl plat_crash_console_flush |
| |
| /* ----------------------------------------------------- |
| * int plat_crash_console_init(void) |
| * Use normal console by default. Switch it to crash |
| * mode so serial consoles become active again. |
| * NOTE: This default implementation will only work for |
| * crashes that occur after a normal console (marked |
| * valid for the crash state) has been registered with |
| * the console framework. To debug crashes that occur |
| * earlier, the platform has to override these functions |
| * with an implementation that initializes a console |
| * driver with hardcoded parameters. See |
| * docs/porting-guide.rst for more information. |
| * ----------------------------------------------------- |
| */ |
| func plat_crash_console_init |
| #if defined(IMAGE_BL1) |
| /* |
| * BL1 code can possibly crash so early that the data segment is not yet |
| * accessible. Don't risk undefined behavior by trying to run the normal |
| * console framework. Platforms that want to debug BL1 will need to |
| * override this with custom functions that can run from registers only. |
| */ |
| mov r0, #0 |
| bx lr |
| #else /* IMAGE_BL1 */ |
| mov r3, lr |
| mov r0, #CONSOLE_FLAG_CRASH |
| bl console_switch_state |
| mov r0, #1 |
| bx r3 |
| #endif |
| endfunc plat_crash_console_init |
| |
| /* ----------------------------------------------------- |
| * void plat_crash_console_putc(int character) |
| * Output through the normal console by default. |
| * ----------------------------------------------------- |
| */ |
| func plat_crash_console_putc |
| b console_putc |
| endfunc plat_crash_console_putc |
| |
| /* ----------------------------------------------------- |
| * void plat_crash_console_flush(void) |
| * Flush normal console by default. |
| * ----------------------------------------------------- |
| */ |
| func plat_crash_console_flush |
| b console_flush |
| endfunc plat_crash_console_flush |