1 /* 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 11 enum { 12 RK_BLK_SIZE = 512, 13 RK_INIT_OFFSET = 4, 14 RK_MAX_BOOT_SIZE = 512 << 10, 15 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, 19 }; 20 21 /** 22 * rkcommon_check_params() - check params 23 * 24 * @return 0 if OK, -1 if ERROR. 25 */ 26 int 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 */ 34 const 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 */ 44 int rkcommon_get_spl_size(struct image_tool_params *params); 45 46 /** 47 * 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 */ 55 int rkcommon_set_header(void *buf, uint file_size, 56 struct image_tool_params *params); 57 58 /** 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 */ 66 bool 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 */ 78 void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size); 79 80 #endif 81