mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 18:59:44 +00:00
45e2d06766
mksunxiboot limits the size of the resulting SPL binaries to pretty conservative values to cover all SoCs and all boot media (NAND). It turns out that we have limit checks in place in the build process, so mksunxiboot can be relaxed and allow packaging binaries up to the actual 32KB the mask boot ROM actually imposes. This allows to have a bigger SPL, which is crucial for AArch64 builds. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jagan Teki <jagan@openedev.com>
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/*
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* (C) Copyright 2007-2011
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Tom Cubie <tangliang@allwinnertech.com>
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*
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* a simple tool to generate bootable image for sunxi platform.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "../arch/arm/include/asm/arch-sunxi/spl.h"
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#define STAMP_VALUE 0x5F0A6C39
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/* check sum functon from sun4i boot code */
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int gen_check_sum(struct boot_file_head *head_p)
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{
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uint32_t length;
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uint32_t *buf;
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uint32_t loop;
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uint32_t i;
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uint32_t sum;
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length = le32_to_cpu(head_p->length);
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if ((length & 0x3) != 0) /* must 4-byte-aligned */
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return -1;
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buf = (uint32_t *)head_p;
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head_p->check_sum = cpu_to_le32(STAMP_VALUE); /* fill stamp */
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loop = length >> 2;
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/* calculate the sum */
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for (i = 0, sum = 0; i < loop; i++)
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sum += le32_to_cpu(buf[i]);
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/* write back check sum */
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head_p->check_sum = cpu_to_le32(sum);
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return 0;
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}
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#define ALIGN(x, a) __ALIGN_MASK((x), (typeof(x))(a)-1)
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#define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
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#define SUNXI_SRAM_SIZE 0x8000 /* SoC with smaller size are limited before */
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#define SRAM_LOAD_MAX_SIZE (SUNXI_SRAM_SIZE - sizeof(struct boot_file_head))
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/*
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* BROM (at least on A10 and A20) requires NAND-images to be explicitly aligned
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* to a multiple of 8K, and rejects the image otherwise. MMC-images are fine
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* with 512B blocks. To cater for both, align to the largest of the two.
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*/
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#define BLOCK_SIZE 0x2000
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struct boot_img {
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struct boot_file_head header;
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char code[SRAM_LOAD_MAX_SIZE];
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char pad[BLOCK_SIZE];
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};
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int main(int argc, char *argv[])
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{
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int fd_in, fd_out;
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struct boot_img img;
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unsigned file_size;
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int count;
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if (argc < 2) {
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printf("\tThis program makes an input bin file to sun4i " \
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"bootable image.\n" \
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"\tUsage: %s input_file out_putfile\n", argv[0]);
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return EXIT_FAILURE;
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}
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fd_in = open(argv[1], O_RDONLY);
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if (fd_in < 0) {
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perror("Open input file");
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return EXIT_FAILURE;
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}
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memset(&img, 0, sizeof(img));
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/* get input file size */
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file_size = lseek(fd_in, 0, SEEK_END);
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if (file_size > SRAM_LOAD_MAX_SIZE) {
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fprintf(stderr, "ERROR: File too large!\n");
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return EXIT_FAILURE;
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}
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fd_out = open(argv[2], O_WRONLY | O_CREAT, 0666);
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if (fd_out < 0) {
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perror("Open output file");
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return EXIT_FAILURE;
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}
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/* read file to buffer to calculate checksum */
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lseek(fd_in, 0, SEEK_SET);
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count = read(fd_in, img.code, file_size);
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if (count != file_size) {
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perror("Reading input image");
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return EXIT_FAILURE;
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}
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/* fill the header */
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img.header.b_instruction = /* b instruction */
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0xEA000000 | /* jump to the first instr after the header */
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((sizeof(struct boot_file_head) / sizeof(int) - 2)
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& 0x00FFFFFF);
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memcpy(img.header.magic, BOOT0_MAGIC, 8); /* no '0' termination */
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img.header.length =
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ALIGN(file_size + sizeof(struct boot_file_head), BLOCK_SIZE);
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img.header.b_instruction = cpu_to_le32(img.header.b_instruction);
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img.header.length = cpu_to_le32(img.header.length);
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memcpy(img.header.spl_signature, SPL_SIGNATURE, 3); /* "sunxi" marker */
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img.header.spl_signature[3] = SPL_HEADER_VERSION;
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gen_check_sum(&img.header);
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count = write(fd_out, &img, le32_to_cpu(img.header.length));
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if (count != le32_to_cpu(img.header.length)) {
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perror("Writing output");
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return EXIT_FAILURE;
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}
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close(fd_in);
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close(fd_out);
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return EXIT_SUCCESS;
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}
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