2 * (C) Copyright 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
7 * Helper functions for Rockchip images
10 #include "imagetool.h"
17 RK_SIGNATURE = 0x0ff0aa55,
21 * struct header0_info - header block for boot ROM
23 * This is stored at SD card block 64 (where each block is 512 bytes, or at
24 * the start of SPI flash. It is encoded with RC4.
26 * @signature: Signature (must be RKSD_SIGNATURE)
27 * @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary
28 * @init_offset: Offset in blocks of the SPL code from this header
29 * block. E.g. 4 means 2KB after the start of this header.
30 * Other fields are not used by U-Boot
37 uint8_t reserved1[492];
39 uint16_t init_boot_size;
43 static unsigned char rc4_key[16] = {
44 124, 78, 3, 4, 85, 5, 9, 7,
45 45, 44, 123, 56, 23, 13, 23, 17
48 int rkcommon_set_header(void *buf, uint file_size)
50 struct header0_info *hdr;
52 if (file_size > CONFIG_ROCKCHIP_MAX_SPL_SIZE)
55 memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE);
56 hdr = (struct header0_info *)buf;
57 hdr->signature = RK_SIGNATURE;
59 hdr->init_offset = RK_INIT_OFFSET;
61 hdr->init_size = (file_size + RK_BLK_SIZE - 1) / RK_BLK_SIZE;
62 hdr->init_size = (hdr->init_size + 3) & ~3;
63 hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE;
65 rc4_encode(buf, RK_BLK_SIZE, rc4_key);