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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (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.
- */
- #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 "imagetool.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 SUNXI_SRAM_SIZE 0x8000 /* SoC with smaller size are limited before */
- #define SRAM_LOAD_MAX_SIZE (SUNXI_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;
- char *tool_name = argv[0];
- char *default_dt = NULL;
- /* a sanity check */
- if ((sizeof(img.header) % 32) != 0) {
- fprintf(stderr, "ERROR: the SPL header must be a multiple ");
- fprintf(stderr, "of 32 bytes.\n");
- return EXIT_FAILURE;
- }
- /* process optional command line switches */
- while (argc >= 2 && argv[1][0] == '-') {
- if (strcmp(argv[1], "--default-dt") == 0) {
- if (argc >= 3) {
- default_dt = argv[2];
- argv += 2;
- argc -= 2;
- continue;
- }
- fprintf(stderr, "ERROR: no --default-dt arg\n");
- return EXIT_FAILURE;
- } else {
- fprintf(stderr, "ERROR: bad option '%s'\n", argv[1]);
- return EXIT_FAILURE;
- }
- }
- if (argc < 3) {
- printf("This program converts an input binary file to a sunxi bootable image.\n");
- printf("\nUsage: %s [options] input_file output_file\n",
- tool_name);
- printf("Where [options] may be:\n");
- printf(" --default-dt arg - 'arg' is the default device tree name\n");
- printf(" (CONFIG_DEFAULT_DEVICE_TREE).\n");
- 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;
- if (default_dt) {
- if (strlen(default_dt) + 1 <= sizeof(img.header.string_pool)) {
- strcpy((char *)img.header.string_pool, default_dt);
- img.header.dt_name_offset =
- cpu_to_le32(offsetof(struct boot_file_head,
- string_pool));
- } else {
- printf("WARNING: The SPL header is too small\n");
- printf(" and has no space to store the dt name.\n");
- }
- }
- 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;
- }
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