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 <mapmem.h>
  11 #include <errno.h>
  12 #include <linux/sizes.h>
  13 #include <linux/stddef.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 /* ASCII version of "RISCV" defined in Linux kernel */
  18 #define LINUX_RISCV_IMAGE_MAGIC 0x5643534952
  19
  20 struct linux_image_h {
  21         uint32_t        code0;          /* Executable code */
  22         uint32_t        code1;          /* Executable code */
  23         uint64_t        text_offset;    /* Image load offset */
  24         uint64_t        image_size;     /* Effective Image size */
  25         uint64_t        res1;           /* reserved */
  26         uint64_t        res2;           /* reserved */
  27         uint64_t        res3;           /* reserved */
  28         uint64_t        magic;          /* Magic number */
  29         uint32_t        res4;           /* reserved */
  30         uint32_t        res5;           /* reserved */
  31 };
  32
  33 int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
  34                 bool force_reloc)
  35 {
  36         struct linux_image_h *lhdr;
  37
  38         lhdr = (struct linux_image_h *)map_sysmem(image, 0);
  39
  40         if (lhdr->magic != LINUX_RISCV_IMAGE_MAGIC) {
  41                 puts("Bad Linux RISCV Image magic!\n");
  42                 return -EINVAL;
  43         }
  44
  45         if (lhdr->image_size == 0) {
  46                 puts("Image lacks image_size field, error!\n");
  47                 return -EINVAL;
  48         }
  49         *size = lhdr->image_size;
  50         *relocated_addr = gd->ram_base + lhdr->text_offset;
  51
  52         unmap_sysmem(lhdr);
  53
  54         return 0;
  55 }