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Commit f56063c5 authored by AKASHI Takahiro's avatar AKASHI Takahiro Committed by Will Deacon
Browse files

arm64: add image head flag definitions 



Those image head's flags will be used later by kexec_file loader.

Signed-off-by: default avatarAKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 497e1858

arch/arm64/include/asm/image.h

0 → 100644
+59 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */



#ifndef __ASM_IMAGE_H

#define __ASM_IMAGE_H



#define ARM64_IMAGE_MAGIC	"ARM\x64"



#define ARM64_IMAGE_FLAG_BE_SHIFT		0

#define ARM64_IMAGE_FLAG_PAGE_SIZE_SHIFT	(ARM64_IMAGE_FLAG_BE_SHIFT + 1)

#define ARM64_IMAGE_FLAG_PHYS_BASE_SHIFT \

					(ARM64_IMAGE_FLAG_PAGE_SIZE_SHIFT + 2)

#define ARM64_IMAGE_FLAG_BE_MASK		0x1

#define ARM64_IMAGE_FLAG_PAGE_SIZE_MASK		0x3

#define ARM64_IMAGE_FLAG_PHYS_BASE_MASK		0x1



#define ARM64_IMAGE_FLAG_LE			0

#define ARM64_IMAGE_FLAG_BE			1

#define ARM64_IMAGE_FLAG_PAGE_SIZE_4K		1

#define ARM64_IMAGE_FLAG_PAGE_SIZE_16K		2

#define ARM64_IMAGE_FLAG_PAGE_SIZE_64K		3

#define ARM64_IMAGE_FLAG_PHYS_BASE		1



#ifndef __ASSEMBLY__



#define arm64_image_flag_field(flags, field) \

				(((flags) >> field##_SHIFT) & field##_MASK)



/*

 * struct arm64_image_header - arm64 kernel image header

 * See Documentation/arm64/booting.txt for details

 *

 * @code0:		Executable code, or

 *   @mz_header		  alternatively used for part of MZ header

 * @code1:		Executable code

 * @text_offset:	Image load offset

 * @image_size:		Effective Image size

 * @flags:		kernel flags

 * @reserved:		reserved

 * @magic:		Magic number

 * @reserved5:		reserved, or

 *   @pe_header:	  alternatively used for PE COFF offset

 */



struct arm64_image_header {

	__le32 code0;

	__le32 code1;

	__le64 text_offset;

	__le64 image_size;

	__le64 flags;

	__le64 res2;

	__le64 res3;

	__le64 res4;

	__le32 magic;

	__le32 res5;

};



#endif /* __ASSEMBLY__ */



#endif /* __ASM_IMAGE_H */

arch/arm64/kernel/head.S

+2 −1
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <asm/cache.h>

#include <asm/cputype.h>

#include <asm/elf.h>

#include <asm/image.h>

#include <asm/kernel-pgtable.h>

#include <asm/kvm_arm.h>

#include <asm/memory.h>
@@ -91,7 +92,7 @@ _head: 
	.quad	0				// reserved

	.quad	0				// reserved

	.quad	0				// reserved

	.ascii	"ARM\x64"			// Magic number

	.ascii	ARM64_IMAGE_MAGIC		// Magic number

#ifdef CONFIG_EFI

	.long	pe_header - _head		// Offset to the PE header.

arch/arm64/kernel/image.h

+13 −8
Original line number Diff line number Diff line
@@ -15,13 +15,15 @@ 
 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#ifndef __ASM_IMAGE_H

#define __ASM_IMAGE_H

#ifndef __ARM64_KERNEL_IMAGE_H

#define __ARM64_KERNEL_IMAGE_H



#ifndef LINKER_SCRIPT

#error This file should only be included in vmlinux.lds.S

#endif



#include <asm/image.h>



/*

 * There aren't any ELF relocations we can use to endian-swap values known only

 * at link time (e.g. the subtraction of two symbol addresses), so we must get
@@ -47,19 +49,22 @@ 
	sym##_lo32 = DATA_LE32((data) & 0xffffffff);		\

	sym##_hi32 = DATA_LE32((data) >> 32)



#define __HEAD_FLAG(field)	(__HEAD_FLAG_##field << \

					ARM64_IMAGE_FLAG_##field##_SHIFT)



#ifdef CONFIG_CPU_BIG_ENDIAN

#define __HEAD_FLAG_BE		1

#define __HEAD_FLAG_BE		ARM64_IMAGE_FLAG_BE

#else

#define __HEAD_FLAG_BE		0

#define __HEAD_FLAG_BE		ARM64_IMAGE_FLAG_LE

#endif



#define __HEAD_FLAG_PAGE_SIZE	((PAGE_SHIFT - 10) / 2)



#define __HEAD_FLAG_PHYS_BASE	1



#define __HEAD_FLAGS		((__HEAD_FLAG_BE << 0) |	\

				 (__HEAD_FLAG_PAGE_SIZE << 1) |	\

				 (__HEAD_FLAG_PHYS_BASE << 3))

#define __HEAD_FLAGS		(__HEAD_FLAG(BE)	| \

				 __HEAD_FLAG(PAGE_SIZE) | \

				 __HEAD_FLAG(PHYS_BASE))



/*

 * These will output as part of the Image header, which should be little-endian
@@ -119,4 +124,4 @@ __efistub_screen_info = KALLSYMS_HIDE(screen_info); 


#endif



#endif /* __ASM_IMAGE_H */
 
#endif /* __ARM64_KERNEL_IMAGE_H */