a131c1f442
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>
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
|
|
* (C) Copyright 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*
|
|
* Helper functions for Rockchip images
|
|
*/
|
|
|
|
#include "imagetool.h"
|
|
#include <image.h>
|
|
#include <rc4.h>
|
|
#include "mkimage.h"
|
|
#include "rkcommon.h"
|
|
|
|
enum {
|
|
RK_SIGNATURE = 0x0ff0aa55,
|
|
};
|
|
|
|
/**
|
|
* struct header0_info - header block for boot ROM
|
|
*
|
|
* This is stored at SD card block 64 (where each block is 512 bytes, or at
|
|
* the start of SPI flash. It is encoded with RC4.
|
|
*
|
|
* @signature: Signature (must be RKSD_SIGNATURE)
|
|
* @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary
|
|
* @code1_offset: Offset in blocks of the SPL code from this header
|
|
* block. E.g. 4 means 2KB after the start of this header.
|
|
* Other fields are not used by U-Boot
|
|
*/
|
|
struct header0_info {
|
|
uint32_t signature;
|
|
uint8_t reserved[4];
|
|
uint32_t disable_rc4;
|
|
uint16_t code1_offset;
|
|
uint16_t code2_offset;
|
|
uint8_t reserved1[490];
|
|
uint16_t usflashdatasize;
|
|
uint16_t ucflashbootsize;
|
|
uint8_t reserved2[2];
|
|
};
|
|
|
|
static unsigned char rc4_key[16] = {
|
|
124, 78, 3, 4, 85, 5, 9, 7,
|
|
45, 44, 123, 56, 23, 13, 23, 17
|
|
};
|
|
|
|
int rkcommon_set_header(void *buf, uint file_size)
|
|
{
|
|
struct header0_info *hdr;
|
|
|
|
if (file_size > RK_MAX_CODE1_SIZE)
|
|
return -ENOSPC;
|
|
|
|
memset(buf, '\0', RK_CODE1_OFFSET * RK_BLK_SIZE);
|
|
hdr = (struct header0_info *)buf;
|
|
hdr->signature = RK_SIGNATURE;
|
|
hdr->disable_rc4 = 1;
|
|
hdr->code1_offset = RK_CODE1_OFFSET;
|
|
hdr->code2_offset = 8;
|
|
|
|
hdr->usflashdatasize = (file_size + RK_BLK_SIZE - 1) / RK_BLK_SIZE;
|
|
hdr->usflashdatasize = (hdr->usflashdatasize + 3) & ~3;
|
|
hdr->ucflashbootsize = hdr->usflashdatasize;
|
|
|
|
debug("size=%x, %x\n", params->file_size, hdr->usflashdatasize);
|
|
|
|
rc4_encode(buf, RK_BLK_SIZE, rc4_key);
|
|
|
|
return 0;
|
|
}
|