Rockchip SoCs require certain formats for code that they execute, The simplest format is a 4-byte header at the start of a binary file. Add support for this so that we can create images that the boot ROM understands. Signed-off-by: Simon Glass <sjg@chromium.org>master
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/*
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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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* Helper functions for Rockchip images |
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*/ |
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#include "imagetool.h" |
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#include <image.h> |
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#include <rc4.h> |
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#include "mkimage.h" |
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#include "rkcommon.h" |
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enum { |
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RK_SIGNATURE = 0x0ff0aa55, |
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}; |
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/**
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* struct header0_info - header block for boot ROM |
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* |
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* This is stored at SD card block 64 (where each block is 512 bytes, or at |
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* the start of SPI flash. It is encoded with RC4. |
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* |
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* @signature: Signature (must be RKSD_SIGNATURE) |
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* @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary |
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* @code1_offset: Offset in blocks of the SPL code from this header |
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* block. E.g. 4 means 2KB after the start of this header. |
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* Other fields are not used by U-Boot |
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*/ |
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struct header0_info { |
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uint32_t signature; |
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uint8_t reserved[4]; |
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uint32_t disable_rc4; |
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uint16_t code1_offset; |
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uint16_t code2_offset; |
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uint8_t reserved1[490]; |
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uint16_t usflashdatasize; |
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uint16_t ucflashbootsize; |
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uint8_t reserved2[2]; |
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}; |
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static unsigned char rc4_key[16] = { |
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124, 78, 3, 4, 85, 5, 9, 7, |
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45, 44, 123, 56, 23, 13, 23, 17 |
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}; |
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int rkcommon_set_header(void *buf, uint file_size) |
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{ |
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struct header0_info *hdr; |
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if (file_size > RK_MAX_CODE1_SIZE) |
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return -ENOSPC; |
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memset(buf, '\0', RK_CODE1_OFFSET * RK_BLK_SIZE); |
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hdr = (struct header0_info *)buf; |
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hdr->signature = RK_SIGNATURE; |
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hdr->disable_rc4 = 1; |
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hdr->code1_offset = RK_CODE1_OFFSET; |
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hdr->code2_offset = 8; |
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hdr->usflashdatasize = (file_size + RK_BLK_SIZE - 1) / RK_BLK_SIZE; |
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hdr->usflashdatasize = (hdr->usflashdatasize + 3) & ~3; |
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hdr->ucflashbootsize = hdr->usflashdatasize; |
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debug("size=%x, %x\n", params->file_size, hdr->usflashdatasize); |
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rc4_encode(buf, RK_BLK_SIZE, rc4_key); |
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return 0; |
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} |
@ -0,0 +1,28 @@ |
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/*
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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_CODE1_OFFSET = 4, |
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RK_MAX_CODE1_SIZE = 32 << 10, |
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}; |
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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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#endif |
@ -0,0 +1,65 @@ |
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/*
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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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* See README.rockchip for details of the rkimage format |
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*/ |
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#include "imagetool.h" |
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#include <image.h> |
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static uint32_t header; |
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static int rkimage_check_params(struct image_tool_params *params) |
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{ |
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return 0; |
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} |
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static int rkimage_verify_header(unsigned char *buf, int size, |
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struct image_tool_params *params) |
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{ |
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return 0; |
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} |
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static void rkimage_print_header(const void *buf) |
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{ |
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} |
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static void rkimage_set_header(void *buf, struct stat *sbuf, int ifd, |
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struct image_tool_params *params) |
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{ |
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memcpy(buf, "RK32", 4); |
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} |
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static int rkimage_extract_subimage(void *buf, struct image_tool_params *params) |
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{ |
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return 0; |
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} |
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static int rkimage_check_image_type(uint8_t type) |
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{ |
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if (type == IH_TYPE_RKIMAGE) |
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return EXIT_SUCCESS; |
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else |
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return EXIT_FAILURE; |
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} |
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/*
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* rk_image parameters |
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*/ |
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U_BOOT_IMAGE_TYPE( |
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rkimage, |
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"Rockchip Boot Image support", |
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4, |
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&header, |
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rkimage_check_params, |
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rkimage_verify_header, |
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rkimage_print_header, |
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rkimage_set_header, |
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rkimage_extract_subimage, |
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rkimage_check_image_type, |
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NULL, |
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NULL |
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); |
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