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arm64: add image head flag definitions
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> Signed-off-by: Will Deacon <will.deacon@arm.com>
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3 changed files with 74 additions and 9 deletions
59
arch/arm64/include/asm/image.h
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59
arch/arm64/include/asm/image.h
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@ -0,0 +1,59 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_IMAGE_H
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#define __ASM_IMAGE_H
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#define ARM64_IMAGE_MAGIC "ARM\x64"
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#define ARM64_IMAGE_FLAG_BE_SHIFT 0
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#define ARM64_IMAGE_FLAG_PAGE_SIZE_SHIFT (ARM64_IMAGE_FLAG_BE_SHIFT + 1)
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#define ARM64_IMAGE_FLAG_PHYS_BASE_SHIFT \
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(ARM64_IMAGE_FLAG_PAGE_SIZE_SHIFT + 2)
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#define ARM64_IMAGE_FLAG_BE_MASK 0x1
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#define ARM64_IMAGE_FLAG_PAGE_SIZE_MASK 0x3
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#define ARM64_IMAGE_FLAG_PHYS_BASE_MASK 0x1
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#define ARM64_IMAGE_FLAG_LE 0
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#define ARM64_IMAGE_FLAG_BE 1
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#define ARM64_IMAGE_FLAG_PAGE_SIZE_4K 1
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#define ARM64_IMAGE_FLAG_PAGE_SIZE_16K 2
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#define ARM64_IMAGE_FLAG_PAGE_SIZE_64K 3
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#define ARM64_IMAGE_FLAG_PHYS_BASE 1
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#ifndef __ASSEMBLY__
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#define arm64_image_flag_field(flags, field) \
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(((flags) >> field##_SHIFT) & field##_MASK)
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/*
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* struct arm64_image_header - arm64 kernel image header
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* See Documentation/arm64/booting.txt for details
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*
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* @code0: Executable code, or
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* @mz_header alternatively used for part of MZ header
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* @code1: Executable code
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* @text_offset: Image load offset
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* @image_size: Effective Image size
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* @flags: kernel flags
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* @reserved: reserved
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* @magic: Magic number
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* @reserved5: reserved, or
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* @pe_header: alternatively used for PE COFF offset
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*/
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struct arm64_image_header {
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__le32 code0;
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__le32 code1;
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__le64 text_offset;
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__le64 image_size;
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__le64 flags;
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__le64 res2;
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__le64 res3;
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__le64 res4;
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__le32 magic;
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__le32 res5;
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};
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_IMAGE_H */
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@ -31,6 +31,7 @@
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#include <asm/cache.h>
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#include <asm/cputype.h>
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#include <asm/elf.h>
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#include <asm/image.h>
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#include <asm/kernel-pgtable.h>
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#include <asm/kvm_arm.h>
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#include <asm/memory.h>
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@ -91,7 +92,7 @@ _head:
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.quad 0 // reserved
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.quad 0 // reserved
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.quad 0 // reserved
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.ascii "ARM\x64" // Magic number
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.ascii ARM64_IMAGE_MAGIC // Magic number
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#ifdef CONFIG_EFI
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.long pe_header - _head // Offset to the PE header.
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@ -15,13 +15,15 @@
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_IMAGE_H
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#define __ASM_IMAGE_H
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#ifndef __ARM64_KERNEL_IMAGE_H
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#define __ARM64_KERNEL_IMAGE_H
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#ifndef LINKER_SCRIPT
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#error This file should only be included in vmlinux.lds.S
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#endif
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#include <asm/image.h>
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/*
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* There aren't any ELF relocations we can use to endian-swap values known only
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* at link time (e.g. the subtraction of two symbol addresses), so we must get
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@ -47,19 +49,22 @@
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sym##_lo32 = DATA_LE32((data) & 0xffffffff); \
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sym##_hi32 = DATA_LE32((data) >> 32)
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#define __HEAD_FLAG(field) (__HEAD_FLAG_##field << \
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ARM64_IMAGE_FLAG_##field##_SHIFT)
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#ifdef CONFIG_CPU_BIG_ENDIAN
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#define __HEAD_FLAG_BE 1
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#define __HEAD_FLAG_BE ARM64_IMAGE_FLAG_BE
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#else
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#define __HEAD_FLAG_BE 0
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#define __HEAD_FLAG_BE ARM64_IMAGE_FLAG_LE
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#endif
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#define __HEAD_FLAG_PAGE_SIZE ((PAGE_SHIFT - 10) / 2)
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#define __HEAD_FLAG_PHYS_BASE 1
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#define __HEAD_FLAGS ((__HEAD_FLAG_BE << 0) | \
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(__HEAD_FLAG_PAGE_SIZE << 1) | \
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(__HEAD_FLAG_PHYS_BASE << 3))
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#define __HEAD_FLAGS (__HEAD_FLAG(BE) | \
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__HEAD_FLAG(PAGE_SIZE) | \
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__HEAD_FLAG(PHYS_BASE))
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/*
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* These will output as part of the Image header, which should be little-endian
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@ -119,4 +124,4 @@ __efistub_screen_info = KALLSYMS_HIDE(screen_info);
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#endif
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#endif /* __ASM_IMAGE_H */
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#endif /* __ARM64_KERNEL_IMAGE_H */
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