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https://github.com/AsahiLinux/u-boot
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366aad4d97
In (first) breaking and (then) fixing the rkspi tool, I realised that the calculation of the required padding (for the header-size and the 2K-in-every-4K SPI layout) was not as self-explainatory as it could have been. This change rewrites the code (using new, common functions in rkcommon.c) and adds verbose in-line comments to ensure that we won't fall into the same pit in the future... Tested on the RK3399 (with has a boot0-style payload) with SD/MMC and SPI. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Acked-by: Simon Glass <sjg@chromium.org>
96 lines
3 KiB
C
96 lines
3 KiB
C
/*
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* (C) Copyright 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _RKCOMMON_H
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#define _RKCOMMON_H
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enum {
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RK_BLK_SIZE = 512,
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RK_INIT_OFFSET = 4,
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RK_MAX_BOOT_SIZE = 512 << 10,
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RK_SPL_HDR_START = RK_INIT_OFFSET * RK_BLK_SIZE,
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RK_SPL_HDR_SIZE = 4,
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RK_SPL_START = RK_SPL_HDR_START + RK_SPL_HDR_SIZE,
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RK_IMAGE_HEADER_LEN = RK_SPL_START,
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};
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/**
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* rkcommon_check_params() - check params
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*
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* @return 0 if OK, -1 if ERROR.
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*/
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int rkcommon_check_params(struct image_tool_params *params);
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/**
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* rkcommon_get_spl_hdr() - get 4-bytes spl hdr for a Rockchip boot image
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*
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* Rockchip's bootrom requires the spl loader to start with a 4-bytes
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* header. The content of this header depends on the chip type.
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*/
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const char *rkcommon_get_spl_hdr(struct image_tool_params *params);
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/**
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* rkcommon_get_spl_size() - get spl size for a Rockchip boot image
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*
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* Different chip may have different sram size. And if we want to jump
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* back to the bootrom after spl, we may need to reserve some sram space
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* for the bootrom.
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* The spl loader size should be sram size minus reserved size(if needed)
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*/
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int rkcommon_get_spl_size(struct image_tool_params *params);
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/**
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* rkcommon_set_header() - set up the header for a Rockchip boot image
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*
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* This sets up a 2KB header which can be interpreted by the Rockchip boot ROM.
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*
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* @buf: Pointer to header place (must be at least 2KB in size)
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* @file_size: Size of the file we want the boot ROM to load, in bytes
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* @return 0 if OK, -ENOSPC if too large
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*/
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int rkcommon_set_header(void *buf, uint file_size,
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struct image_tool_params *params);
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/**
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* rkcommon_need_rc4_spl() - check if rc4 encoded spl is required
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*
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* Some socs cannot disable the rc4-encryption of the spl binary.
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* rc4 encryption is disabled normally except on socs that cannot
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* handle unencrypted binaries.
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* @return true or false depending on rc4 being required.
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*/
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bool rkcommon_need_rc4_spl(struct image_tool_params *params);
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/**
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* rkcommon_rc4_encode_spl() - encode the spl binary
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*
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* Encrypts the SPL binary using the generic rc4 key as required
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* by some socs.
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*
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* @buf: Pointer to the SPL data (header and SPL binary)
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* @offset: offset inside buf to start at
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* @size: number of bytes to encode
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*/
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void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size);
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/**
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* rkcommon_vrec_header() - allocate memory for the header
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*
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* @params: Pointer to the tool params structure
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* @tparams: Pointer tot the image type structure (for setting
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* the header and header_size)
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* @alignment: Alignment (a power of two) that the image should be
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* padded to (e.g. 512 if we want to align with SD/MMC
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* blocksizes or 2048 for the SPI format)
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*
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* @return bytes of padding required/added (does not include the header_size)
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*/
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int rkcommon_vrec_header(struct image_tool_params *params,
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struct image_type_params *tparams,
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unsigned int alignment);
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#endif
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