LXR uboot/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 <asm/global_data.h>
  14#include <linux/sizes.h>
  15#include <linux/stddef.h>
  16
  17DECLARE_GLOBAL_DATA_PTR;
  18
  19/* ASCII version of "RSC\0x5" defined in Linux kernel */
  20#define LINUX_RISCV_IMAGE_MAGIC 0x05435352
  21
  22struct linux_image_h {
  23        uint32_t        code0;          /* Executable code */
  24        uint32_t        code1;          /* Executable code */
  25        uint64_t        text_offset;    /* Image load offset */
  26        uint64_t        image_size;     /* Effective Image size */
  27        uint64_t        flags;          /* kernel flags (little endian) */
  28        uint32_t        version;        /* version of the header */
  29        uint32_t        res1;           /* reserved */
  30        uint64_t        res2;           /* reserved */
  31        uint64_t        res3;           /* reserved */
  32        uint32_t        magic;          /* Magic number */
  33        uint32_t        res4;           /* reserved */
  34};
  35
  36int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
  37                bool force_reloc)
  38{
  39        struct linux_image_h *lhdr;
  40
  41        lhdr = (struct linux_image_h *)map_sysmem(image, 0);
  42
  43        if (lhdr->magic != LINUX_RISCV_IMAGE_MAGIC) {
  44                puts("Bad Linux RISCV Image magic!\n");
  45                return -EINVAL;
  46        }
  47
  48        if (lhdr->image_size == 0) {
  49                puts("Image lacks image_size field, error!\n");
  50                return -EINVAL;
  51        }
  52        *size = lhdr->image_size;
  53        if (force_reloc ||
  54           (gd->ram_base <= image && image < gd->ram_base + gd->ram_size)) {
  55                *relocated_addr = gd->ram_base + lhdr->text_offset;
  56        } else {
  57                *relocated_addr = image;
  58        }
  59
  60        unmap_sysmem(lhdr);
  61
  62        return 0;
  63}
  64