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 <image.h> 10#include <mapmem.h> 11#include <errno.h> 12#include <asm/global_data.h> 13#include <linux/sizes.h> 14#include <linux/stddef.h> 15 16DECLARE_GLOBAL_DATA_PTR; 17 18/* ASCII version of "RSC\0x5" defined in Linux kernel */ 19#define LINUX_RISCV_IMAGE_MAGIC 0x05435352 20 21struct 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 35int 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 if (force_reloc || 53 (gd->ram_base <= image && image < gd->ram_base + gd->ram_size)) { 54 *relocated_addr = gd->ram_base + lhdr->text_offset; 55 } else { 56 *relocated_addr = image; 57 } 58 59 unmap_sysmem(lhdr); 60 61 return 0; 62} 63