xref: /openbmc/linux/arch/riscv/include/asm/image.h (revision 1d5c17e4)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef _ASM_RISCV_IMAGE_H
4 #define _ASM_RISCV_IMAGE_H
5 
6 #define RISCV_IMAGE_MAGIC	"RISCV\0\0\0"
7 #define RISCV_IMAGE_MAGIC2	"RSC\x05"
8 
9 #define RISCV_IMAGE_FLAG_BE_SHIFT	0
10 #define RISCV_IMAGE_FLAG_BE_MASK	0x1
11 
12 #define RISCV_IMAGE_FLAG_LE		0
13 #define RISCV_IMAGE_FLAG_BE		1
14 
15 #ifdef CONFIG_CPU_BIG_ENDIAN
16 #error conversion of header fields to LE not yet implemented
17 #else
18 #define __HEAD_FLAG_BE		RISCV_IMAGE_FLAG_LE
19 #endif
20 
21 #define __HEAD_FLAG(field)	(__HEAD_FLAG_##field << \
22 				RISCV_IMAGE_FLAG_##field##_SHIFT)
23 
24 #define __HEAD_FLAGS		(__HEAD_FLAG(BE))
25 
26 #define RISCV_HEADER_VERSION_MAJOR 0
27 #define RISCV_HEADER_VERSION_MINOR 2
28 
29 #define RISCV_HEADER_VERSION (RISCV_HEADER_VERSION_MAJOR << 16 | \
30 			      RISCV_HEADER_VERSION_MINOR)
31 
32 #ifndef __ASSEMBLY__
33 /**
34  * struct riscv_image_header - riscv kernel image header
35  * @code0:		Executable code
36  * @code1:		Executable code
37  * @text_offset:	Image load offset (little endian)
38  * @image_size:		Effective Image size (little endian)
39  * @flags:		kernel flags (little endian)
40  * @version:		version
41  * @res1:		reserved
42  * @res2:		reserved
43  * @magic:		Magic number (RISC-V specific; deprecated)
44  * @magic2:		Magic number 2 (to match the ARM64 'magic' field pos)
45  * @res3:		reserved (will be used for PE COFF offset)
46  *
47  * The intention is for this header format to be shared between multiple
48  * architectures to avoid a proliferation of image header formats.
49  */
50 
51 struct riscv_image_header {
52 	u32 code0;
53 	u32 code1;
54 	u64 text_offset;
55 	u64 image_size;
56 	u64 flags;
57 	u32 version;
58 	u32 res1;
59 	u64 res2;
60 	u64 magic;
61 	u32 magic2;
62 	u32 res3;
63 };
64 #endif /* __ASSEMBLY__ */
65 #endif /* _ASM_RISCV_IMAGE_H */
66