/* * (C) Copyright 2007-2011 * Allwinner Technology Co., Ltd. <www.allwinnertech.com> * Tom Cubie <tangliang@allwinnertech.com> * * a simple tool to generate bootable image for sunxi platform. * * SPDX-License-Identifier: GPL-2.0+ */ #include <fcntl.h> #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <sys/types.h> #include <sys/stat.h> #include "../arch/arm/include/asm/arch-sunxi/spl.h" #define STAMP_VALUE 0x5F0A6C39 /* check sum functon from sun4i boot code */ int gen_check_sum(struct boot_file_head *head_p) { uint32_t length; uint32_t *buf; uint32_t loop; uint32_t i; uint32_t sum; length = le32_to_cpu(head_p->length); if ((length & 0x3) != 0) /* must 4-byte-aligned */ return -1; buf = (uint32_t *)head_p; head_p->check_sum = cpu_to_le32(STAMP_VALUE); /* fill stamp */ loop = length >> 2; /* calculate the sum */ for (i = 0, sum = 0; i < loop; i++) sum += le32_to_cpu(buf[i]); /* write back check sum */ head_p->check_sum = cpu_to_le32(sum); return 0; } #define ALIGN(x, a) __ALIGN_MASK((x), (typeof(x))(a)-1) #define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) #define SUN4I_SRAM_SIZE 0x7600 /* 0x7748+ is used by BROM */ #define SRAM_LOAD_MAX_SIZE (SUN4I_SRAM_SIZE - sizeof(struct boot_file_head)) /* * BROM (at least on A10 and A20) requires NAND-images to be explicitly aligned * to a multiple of 8K, and rejects the image otherwise. MMC-images are fine * with 512B blocks. To cater for both, align to the largest of the two. */ #define BLOCK_SIZE 0x2000 struct boot_img { struct boot_file_head header; char code[SRAM_LOAD_MAX_SIZE]; char pad[BLOCK_SIZE]; }; int main(int argc, char *argv[]) { int fd_in, fd_out; struct boot_img img; unsigned file_size; int count; if (argc < 2) { printf("\tThis program makes an input bin file to sun4i " \ "bootable image.\n" \ "\tUsage: %s input_file out_putfile\n", argv[0]); return EXIT_FAILURE; } fd_in = open(argv[1], O_RDONLY); if (fd_in < 0) { perror("Open input file"); return EXIT_FAILURE; } memset(&img, 0, sizeof(img)); /* get input file size */ file_size = lseek(fd_in, 0, SEEK_END); if (file_size > SRAM_LOAD_MAX_SIZE) { fprintf(stderr, "ERROR: File too large!\n"); return EXIT_FAILURE; } fd_out = open(argv[2], O_WRONLY | O_CREAT, 0666); if (fd_out < 0) { perror("Open output file"); return EXIT_FAILURE; } /* read file to buffer to calculate checksum */ lseek(fd_in, 0, SEEK_SET); count = read(fd_in, img.code, file_size); if (count != file_size) { perror("Reading input image"); return EXIT_FAILURE; } /* fill the header */ img.header.b_instruction = /* b instruction */ 0xEA000000 | /* jump to the first instr after the header */ ((sizeof(struct boot_file_head) / sizeof(int) - 2) & 0x00FFFFFF); memcpy(img.header.magic, BOOT0_MAGIC, 8); /* no '0' termination */ img.header.length = ALIGN(file_size + sizeof(struct boot_file_head), BLOCK_SIZE); img.header.b_instruction = cpu_to_le32(img.header.b_instruction); img.header.length = cpu_to_le32(img.header.length); memcpy(img.header.spl_signature, SPL_SIGNATURE, 3); /* "sunxi" marker */ img.header.spl_signature[3] = SPL_HEADER_VERSION; gen_check_sum(&img.header); count = write(fd_out, &img, le32_to_cpu(img.header.length)); if (count != le32_to_cpu(img.header.length)) { perror("Writing output"); return EXIT_FAILURE; } close(fd_in); close(fd_out); return EXIT_SUCCESS; }