]>
git.ipfire.org Git - people/ms/u-boot.git/blob - tools/mksunxiboot.c
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>
19 /* boot head definition from sun4i boot code */
20 struct boot_file_head
{
21 uint32_t b_instruction
; /* one intruction jumping to real code */
22 uint8_t magic
[8]; /* ="eGON.BT0" or "eGON.BT1", not C-style str */
23 uint32_t check_sum
; /* generated by PC */
24 uint32_t length
; /* generated by PC */
26 * We use a simplified header, only filling in what is needed
27 * by the boot ROM. To be compatible with Allwinner tools we
28 * would need to implement the proper fields here instead of
31 uint8_t pad
[12]; /* align to 32 bytes */
34 #define BOOT0_MAGIC "eGON.BT0"
35 #define STAMP_VALUE 0x5F0A6C39
37 /* check sum functon from sun4i boot code */
38 int gen_check_sum(struct boot_file_head
*head_p
)
46 length
= head_p
->length
;
47 if ((length
& 0x3) != 0) /* must 4-byte-aligned */
49 buf
= (uint32_t *)head_p
;
50 head_p
->check_sum
= STAMP_VALUE
; /* fill stamp */
53 /* calculate the sum */
54 for (i
= 0, sum
= 0; i
< loop
; i
++)
57 /* write back check sum */
58 head_p
->check_sum
= sum
;
63 #define ALIGN(x, a) __ALIGN_MASK((x), (typeof(x))(a)-1)
64 #define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
66 #define SUN4I_SRAM_SIZE 0x7600 /* 0x7748+ is used by BROM */
67 #define SRAM_LOAD_MAX_SIZE (SUN4I_SRAM_SIZE - sizeof(struct boot_file_head))
68 #define BLOCK_SIZE 512
71 struct boot_file_head header
;
72 char code
[SRAM_LOAD_MAX_SIZE
];
76 int main(int argc
, char *argv
[])
84 printf("\tThis program makes an input bin file to sun4i " \
86 "\tUsage: %s input_file out_putfile\n", argv
[0]);
90 fd_in
= open(argv
[1], O_RDONLY
);
92 perror("Open input file");
96 memset(img
.pad
, 0, BLOCK_SIZE
);
98 /* get input file size */
99 file_size
= lseek(fd_in
, 0, SEEK_END
);
101 if (file_size
> SRAM_LOAD_MAX_SIZE
) {
102 fprintf(stderr
, "ERROR: File too large!\n");
106 fd_out
= open(argv
[2], O_WRONLY
| O_CREAT
, 0666);
108 perror("Open output file");
112 /* read file to buffer to calculate checksum */
113 lseek(fd_in
, 0, SEEK_SET
);
114 count
= read(fd_in
, img
.code
, file_size
);
115 if (count
!= file_size
) {
116 perror("Reading input image");
120 /* fill the header */
121 img
.header
.b_instruction
= /* b instruction */
122 0xEA000000 | /* jump to the first instr after the header */
123 ((sizeof(struct boot_file_head
) / sizeof(int) - 2)
125 memcpy(img
.header
.magic
, BOOT0_MAGIC
, 8); /* no '0' termination */
127 ALIGN(file_size
+ sizeof(struct boot_file_head
), BLOCK_SIZE
);
128 gen_check_sum(&img
.header
);
130 count
= write(fd_out
, &img
, img
.header
.length
);
131 if (count
!= img
.header
.length
) {
132 perror("Writing output");