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Subject[PATCH v11 06/15] arm64: add image head flag definitions
Date
Those image head's flags will be used later by kexec_file loader.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: James Morse <james.morse@arm.com>
---
arch/arm64/include/asm/boot.h | 15 +++++++++++++++
arch/arm64/kernel/head.S | 2 +-
2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/boot.h b/arch/arm64/include/asm/boot.h
index 355e552a9175..0bab7eed3012 100644
--- a/arch/arm64/include/asm/boot.h
+++ b/arch/arm64/include/asm/boot.h
@@ -5,6 +5,21 @@

#include <asm/sizes.h>

+#define ARM64_MAGIC "ARM\x64"
+
+#define HEAD_FLAG_BE_SHIFT 0
+#define HEAD_FLAG_PAGE_SIZE_SHIFT 1
+#define HEAD_FLAG_BE_MASK 0x1
+#define HEAD_FLAG_PAGE_SIZE_MASK 0x3
+
+#define HEAD_FLAG_BE 1
+#define HEAD_FLAG_PAGE_SIZE_4K 1
+#define HEAD_FLAG_PAGE_SIZE_16K 2
+#define HEAD_FLAG_PAGE_SIZE_64K 3
+
+#define head_flag_field(flags, field) \
+ (((flags) >> field##_SHIFT) & field##_MASK)
+
/*
* arm64 requires the DTB to be 8 byte aligned and
* not exceed 2MB in size.
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index b0853069702f..8cbac6232ed1 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -91,7 +91,7 @@ _head:
.quad 0 // reserved
.quad 0 // reserved
.quad 0 // reserved
- .ascii "ARM\x64" // Magic number
+ .ascii ARM64_MAGIC // Magic number
#ifdef CONFIG_EFI
.long pe_header - _head // Offset to the PE header.

--
2.17.0
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