2 * (C) Copyright 2007-2011
3 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
4 * Tom Cubie <tangliang@allwinnertech.com>
6 * a simple tool to generate bootable image for sunxi platform.
8 * SPDX-License-Identifier: GPL-2.0+
16 #include <sys/types.h>
18 #include "asm/arch/spl.h"
20 #define STAMP_VALUE 0x5F0A6C39
22 /* check sum functon from sun4i boot code */
23 int gen_check_sum(struct boot_file_head *head_p)
31 length = le32_to_cpu(head_p->length);
32 if ((length & 0x3) != 0) /* must 4-byte-aligned */
34 buf = (uint32_t *)head_p;
35 head_p->check_sum = cpu_to_le32(STAMP_VALUE); /* fill stamp */
38 /* calculate the sum */
39 for (i = 0, sum = 0; i < loop; i++)
40 sum += le32_to_cpu(buf[i]);
42 /* write back check sum */
43 head_p->check_sum = cpu_to_le32(sum);
48 #define ALIGN(x, a) __ALIGN_MASK((x), (typeof(x))(a)-1)
49 #define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
51 #define SUN4I_SRAM_SIZE 0x7600 /* 0x7748+ is used by BROM */
52 #define SRAM_LOAD_MAX_SIZE (SUN4I_SRAM_SIZE - sizeof(struct boot_file_head))
55 * BROM (at least on A10 and A20) requires NAND-images to be explicitly aligned
56 * to a multiple of 8K, and rejects the image otherwise. MMC-images are fine
57 * with 512B blocks. To cater for both, align to the largest of the two.
59 #define BLOCK_SIZE 0x2000
62 struct boot_file_head header;
63 char code[SRAM_LOAD_MAX_SIZE];
67 int main(int argc, char *argv[])
75 printf("\tThis program makes an input bin file to sun4i " \
77 "\tUsage: %s input_file out_putfile\n", argv[0]);
81 fd_in = open(argv[1], O_RDONLY);
83 perror("Open input file");
87 memset(&img, 0, sizeof(img));
89 /* get input file size */
90 file_size = lseek(fd_in, 0, SEEK_END);
92 if (file_size > SRAM_LOAD_MAX_SIZE) {
93 fprintf(stderr, "ERROR: File too large!\n");
97 fd_out = open(argv[2], O_WRONLY | O_CREAT, 0666);
99 perror("Open output file");
103 /* read file to buffer to calculate checksum */
104 lseek(fd_in, 0, SEEK_SET);
105 count = read(fd_in, img.code, file_size);
106 if (count != file_size) {
107 perror("Reading input image");
111 /* fill the header */
112 img.header.b_instruction = /* b instruction */
113 0xEA000000 | /* jump to the first instr after the header */
114 ((sizeof(struct boot_file_head) / sizeof(int) - 2)
116 memcpy(img.header.magic, BOOT0_MAGIC, 8); /* no '0' termination */
118 ALIGN(file_size + sizeof(struct boot_file_head), BLOCK_SIZE);
119 img.header.b_instruction = cpu_to_le32(img.header.b_instruction);
120 img.header.length = cpu_to_le32(img.header.length);
122 memcpy(img.header.spl_signature, SPL_SIGNATURE, 3); /* "sunxi" marker */
123 img.header.spl_signature[3] = SPL_HEADER_VERSION;
125 gen_check_sum(&img.header);
127 count = write(fd_out, &img, le32_to_cpu(img.header.length));
128 if (count != le32_to_cpu(img.header.length)) {
129 perror("Writing output");