Merge tag 'u-boot-atmel-fixes-2020.07-a' of https://gitlab.denx.de/u-boot/custodians...
[oweals/u-boot.git] / arch / riscv / lib / image.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2019 Western Digital Corporation or its affiliates.
4  * Authors:
5  *      Atish Patra <atish.patra@wdc.com>
6  * Based on arm/lib/image.c
7  */
8
9 #include <common.h>
10 #include <image.h>
11 #include <mapmem.h>
12 #include <errno.h>
13 #include <linux/sizes.h>
14 #include <linux/stddef.h>
15
16 DECLARE_GLOBAL_DATA_PTR;
17
18 /* ASCII version of "RSC\0x5" defined in Linux kernel */
19 #define LINUX_RISCV_IMAGE_MAGIC 0x05435352
20
21 struct linux_image_h {
22         uint32_t        code0;          /* Executable code */
23         uint32_t        code1;          /* Executable code */
24         uint64_t        text_offset;    /* Image load offset */
25         uint64_t        image_size;     /* Effective Image size */
26         uint64_t        flags;          /* kernel flags (little endian) */
27         uint32_t        version;        /* version of the header */
28         uint32_t        res1;           /* reserved */
29         uint64_t        res2;           /* reserved */
30         uint64_t        res3;           /* reserved */
31         uint32_t        magic;          /* Magic number */
32         uint32_t        res4;           /* reserved */
33 };
34
35 int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
36                 bool force_reloc)
37 {
38         struct linux_image_h *lhdr;
39
40         lhdr = (struct linux_image_h *)map_sysmem(image, 0);
41
42         if (lhdr->magic != LINUX_RISCV_IMAGE_MAGIC) {
43                 puts("Bad Linux RISCV Image magic!\n");
44                 return -EINVAL;
45         }
46
47         if (lhdr->image_size == 0) {
48                 puts("Image lacks image_size field, error!\n");
49                 return -EINVAL;
50         }
51         *size = lhdr->image_size;
52         *relocated_addr = gd->ram_base + lhdr->text_offset;
53
54         unmap_sysmem(lhdr);
55
56         return 0;
57 }