blob: a5ebff510a7b3ace5277194604dc9949843676fd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
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
|
From 3e10fcde3f3c24a488866dd33fa3f5d46ff3d7a3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Schieli?= <cschieli@gmail.com>
Date: Fri, 11 Nov 2016 11:59:06 +0100
Subject: [PATCH] arm: add save_boot_params for ARM1176
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Implement a hook to allow boards to save boot-time CPU state for later
use. When U-Boot is chain-loaded by another bootloader, CPU registers may
contain useful information such as system configuration information. This
feature mirrors the equivalent ARMv7 feature.
Signed-off-by: Cédric Schieli <cschieli@gmail.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Paul Barker <paul@paulbarker.me.uk>
Upstream-status: Backport
---
arch/arm/cpu/arm1176/start.S | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index a602d4e..7c00201 100644
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -16,6 +16,7 @@
#include <asm-offsets.h>
#include <config.h>
+#include <linux/linkage.h>
#ifndef CONFIG_SYS_PHY_UBOOT_BASE
#define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE
@@ -37,6 +38,11 @@
.globl reset
reset:
+ /* Allow the board to save important registers */
+ b save_boot_params
+.globl save_boot_params_ret
+save_boot_params_ret:
+
/*
* set the cpu to SVC32 mode
*/
@@ -110,3 +116,7 @@ mmu_disable_phys:
c_runtime_cpu_setup:
mov pc, lr
+
+WEAK(save_boot_params)
+ b save_boot_params_ret /* back to my caller */
+ENDPROC(save_boot_params)
--
2.1.4
|
