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Simon Glassa131c1f2015-08-30 16:55:24 -06001/*
2 * (C) Copyright 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#ifndef _RKCOMMON_H
9#define _RKCOMMON_H
10
11enum {
12 RK_BLK_SIZE = 512,
Jeffy Chen36413392015-11-17 14:20:30 +080013 RK_INIT_OFFSET = 4,
14 RK_MAX_BOOT_SIZE = 512 << 10,
Jeffy Chen7bf274b2015-11-27 12:07:17 +080015 RK_SPL_HDR_START = RK_INIT_OFFSET * RK_BLK_SIZE,
16 RK_SPL_HDR_SIZE = 4,
17 RK_SPL_START = RK_SPL_HDR_START + RK_SPL_HDR_SIZE,
18 RK_IMAGE_HEADER_LEN = RK_SPL_START,
Simon Glassa131c1f2015-08-30 16:55:24 -060019};
20
21/**
Jeffy Chen7bf274b2015-11-27 12:07:17 +080022 * rkcommon_check_params() - check params
23 *
24 * @return 0 if OK, -1 if ERROR.
25 */
26int rkcommon_check_params(struct image_tool_params *params);
27
28/**
29 * rkcommon_get_spl_hdr() - get 4-bytes spl hdr for a Rockchip boot image
30 *
31 * Rockchip's bootrom requires the spl loader to start with a 4-bytes
32 * header. The content of this header depends on the chip type.
33 */
34const char *rkcommon_get_spl_hdr(struct image_tool_params *params);
35
36/**
37 * rkcommon_get_spl_size() - get spl size for a Rockchip boot image
38 *
39 * Different chip may have different sram size. And if we want to jump
40 * back to the bootrom after spl, we may need to reserve some sram space
41 * for the bootrom.
42 * The spl loader size should be sram size minus reserved size(if needed)
43 */
44int rkcommon_get_spl_size(struct image_tool_params *params);
45
46/**
Simon Glassa131c1f2015-08-30 16:55:24 -060047 * rkcommon_set_header() - set up the header for a Rockchip boot image
48 *
49 * This sets up a 2KB header which can be interpreted by the Rockchip boot ROM.
50 *
51 * @buf: Pointer to header place (must be at least 2KB in size)
52 * @file_size: Size of the file we want the boot ROM to load, in bytes
53 * @return 0 if OK, -ENOSPC if too large
54 */
Jeffy Chen7bf274b2015-11-27 12:07:17 +080055int rkcommon_set_header(void *buf, uint file_size,
56 struct image_tool_params *params);
Simon Glassa131c1f2015-08-30 16:55:24 -060057
Heiko Stübnercfbcdad2017-02-18 19:46:27 +010058/**
59 * rkcommon_need_rc4_spl() - check if rc4 encoded spl is required
60 *
61 * Some socs cannot disable the rc4-encryption of the spl binary.
62 * rc4 encryption is disabled normally except on socs that cannot
63 * handle unencrypted binaries.
64 * @return true or false depending on rc4 being required.
65 */
66bool rkcommon_need_rc4_spl(struct image_tool_params *params);
67
68/**
69 * rkcommon_rc4_encode_spl() - encode the spl binary
70 *
71 * Encrypts the SPL binary using the generic rc4 key as required
72 * by some socs.
73 *
74 * @buf: Pointer to the SPL data (header and SPL binary)
75 * @offset: offset inside buf to start at
76 * @size: number of bytes to encode
77 */
78void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size);
79
Simon Glassa131c1f2015-08-30 16:55:24 -060080#endif