5 files changed, 57 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 72b0aa78a5..0805fa41ac 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -91,6 +91,14 @@ config SYS_L2CACHE_OFF
 	  If SoC does not support L2CACHE or one do not want to enable
 	  L2CACHE, choose this option.
 
+config ENABLE_ARM_SOC_BOOT0_HOOK
+	bool "prepare BOOT0 header"
+	help
+	  If the SoC's BOOT0 requires a header area filled with (magic)
+	  values, then choose this option, and create a define called
+	  ARM_SOC_BOOT0_HOOK which contains the required assembler
+	  preprocessor code.
+
 choice
 	prompt "Target select"
 	default TARGET_HIKEY
diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S
index e933021a17..c1a2f456d5 100644
--- a/arch/arm/cpu/armv8/start.S
+++ b/arch/arm/cpu/armv8/start.S
@@ -21,6 +21,16 @@
 _start:
 	b	reset
 
+#ifdef CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK
+/*
+ * Various SoCs need something special and SoC-specific up front in
+ * order to boot, allow them to set that in their boot0.h file and then
+ * use it here.
+ */
+#include <asm/arch/boot0.h>
+ARM_SOC_BOOT0_HOOK
+#endif
+
 	.align 3
 
 .globl	_TEXT_BASE
diff --git a/arch/arm/include/asm/arch-bcm281xx/boot0.h b/arch/arm/include/asm/arch-bcm281xx/boot0.h
new file mode 100644
index 0000000000..7e72882725
--- /dev/null
+++ b/arch/arm/include/asm/arch-bcm281xx/boot0.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright 2016 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __BOOT0_H
+#define __BOOT0_H
+
+/* BOOT0 header information */
+#define ARM_SOC_BOOT0_HOOK	\
+	.word	0xbabeface;	\
+	.word	_end - _start
+
+#endif /* __BOOT0_H */
diff --git a/arch/arm/include/asm/arch-sunxi/boot0.h b/arch/arm/include/asm/arch-sunxi/boot0.h
new file mode 100644
index 0000000000..ea5675eb9e
--- /dev/null
+++ b/arch/arm/include/asm/arch-sunxi/boot0.h
@@ -0,0 +1,14 @@
+/*
+ * Configuration settings for the Allwinner A64 (sun50i) CPU
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __BOOT0_H
+#define __BOOT0_H
+
+/* reserve space for BOOT0 header information */
+#define ARM_SOC_BOOT0_HOOK	\
+	.space	1532
+
+#endif /* __BOOT0_H */
diff --git a/arch/arm/lib/vectors.S b/arch/arm/lib/vectors.S
index 49238ed21e..5cc132b7b8 100644
--- a/arch/arm/lib/vectors.S
+++ b/arch/arm/lib/vectors.S
@@ -60,6 +60,16 @@ _start:
 	ldr	pc, _irq
 	ldr	pc, _fiq
 
+#ifdef CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK
+/*
+ * Various SoCs need something special and SoC-specific up front in
+ * order to boot, allow them to set that in their boot0.h file and then
+ * use it here.
+ */
+#include <asm/arch/boot0.h>
+ARM_SOC_BOOT0_HOOK
+#endif
+
 /*
  *************************************************************************
  *