rkcommon.h
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/*
* (C) Copyright 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _RKCOMMON_H
#define _RKCOMMON_H
enum {
RK_BLK_SIZE = 512,
RK_INIT_SIZE_ALIGN = 2048,
RK_INIT_OFFSET = 4,
RK_MAX_BOOT_SIZE = 512 << 10,
RK_SPL_HDR_START = RK_INIT_OFFSET * RK_BLK_SIZE,
RK_SPL_HDR_SIZE = 4,
RK_SPL_START = RK_SPL_HDR_START + RK_SPL_HDR_SIZE,
RK_IMAGE_HEADER_LEN = RK_SPL_START,
};
/**
* rkcommon_check_params() - check params
*
* @return 0 if OK, -1 if ERROR.
*/
int rkcommon_check_params(struct image_tool_params *params);
/**
* rkcommon_get_spl_hdr() - get 4-bytes spl hdr for a Rockchip boot image
*
* Rockchip's bootrom requires the spl loader to start with a 4-bytes
* header. The content of this header depends on the chip type.
*/
const char *rkcommon_get_spl_hdr(struct image_tool_params *params);
/**
* rkcommon_get_spl_size() - get spl size for a Rockchip boot image
*
* Different chip may have different sram size. And if we want to jump
* back to the bootrom after spl, we may need to reserve some sram space
* for the bootrom.
* The spl loader size should be sram size minus reserved size(if needed)
*/
int rkcommon_get_spl_size(struct image_tool_params *params);
/**
* rkcommon_set_header() - set up the header for a Rockchip boot image
*
* This sets up a 2KB header which can be interpreted by the Rockchip boot ROM.
*
* @buf: Pointer to header place (must be at least 2KB in size)
* @file_size: Size of the file we want the boot ROM to load, in bytes
* @return 0 if OK, -ENOSPC if too large
*/
int rkcommon_set_header(void *buf, uint file_size,
struct image_tool_params *params);
/**
* rkcommon_verify_header() - verify the header for a Rockchip boot image
*
* @buf: Pointer to the image file
* @file_size: Size of entire bootable image file (incl. all padding)
* @return 0 if OK
*/
int rkcommon_verify_header(unsigned char *buf, int size,
struct image_tool_params *params);
/**
* rkcommon_print_header() - print the header for a Rockchip boot image
*
* This prints the header, spl_name and whether this is a SD/MMC or SPI image.
*
* @buf: Pointer to the image (can be a read-only file-mapping)
*/
void rkcommon_print_header(const void *buf);
/**
* rkcommon_need_rc4_spl() - check if rc4 encoded spl is required
*
* Some socs cannot disable the rc4-encryption of the spl binary.
* rc4 encryption is disabled normally except on socs that cannot
* handle unencrypted binaries.
* @return true or false depending on rc4 being required.
*/
bool rkcommon_need_rc4_spl(struct image_tool_params *params);
/**
* rkcommon_rc4_encode_spl() - encode the spl binary
*
* Encrypts the SPL binary using the generic rc4 key as required
* by some socs.
*
* @buf: Pointer to the SPL data (header and SPL binary)
* @offset: offset inside buf to start at
* @size: number of bytes to encode
*/
void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size);
/**
* rkcommon_vrec_header() - allocate memory for the header
*
* @params: Pointer to the tool params structure
* @tparams: Pointer tot the image type structure (for setting
* the header and header_size)
* @alignment: Alignment (a power of two) that the image should be
* padded to (e.g. 512 if we want to align with SD/MMC
* blocksizes or 2048 for the SPI format)
*
* @return bytes of padding required/added (does not include the header_size)
*/
int rkcommon_vrec_header(struct image_tool_params *params,
struct image_type_params *tparams,
unsigned int alignment);
#endif