Skip to content

GitLab

Switch branch/tag
Find file Normal viewHistoryPermalink
crash_console_helpers.S 2.17 KB
Newer Older
Antonio Nino Diaz's avatar
Add sample crash console functions    
Antonio Nino Diaz committed
1
2
3
4
5
6
7
8
9
10
11
12 
/*
 * 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>
Antonio Nino Diaz's avatar
Sanitise includes across codebase    
Antonio Nino Diaz committed
13 
#include <drivers/console.h>
Antonio Nino Diaz's avatar
Add sample crash console functions    
Antonio Nino Diaz committed
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68 

	.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