nuttx/boards/arm/lpc31xx/ea3131/tools/lpchdr.h

/****************************************************************************
 * boards/arm/lpc31xx/ea3131/tools/lpchdr.h
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

#ifndef __BOARDS_ARM_LPC31XX_EA3131_TOOLS_LPCHDR_H
#define __BOARDS_ARM_LPC31XX_EA3131_TOOLS_LPCHDR_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <stdint.h>

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/****************************************************************************
 * Public Types
 ****************************************************************************/

struct lpc31_header_s
{
                              /* OFFS DESCRIPTION */

  uint32_t vector;            /* 0x00    Valid ARM instruction. Usually this will be
                               *    a branch instruction to entry point of the
                               *    image. */
  uint32_t magic;             /* 0x04    This field is used by boot ROM to detect a
                               *    valid image header. This field should always
                               *    be set to 0x41676d69. */
  uint32_t execution_crc32;   /* 0x08    CRC32 value of execution part of the image. If
                               *    the <EFBFBD>image_type<EFBFBD> is set to <EFBFBD>0xA<EFBFBD>, this field
                               *    is ignored by boot ROM. */
  uint32_t reserved0[4];      /* 0x0c-0x18: Should be zero. */
  uint32_t imagetype;         /* 0x1c Specifies whether CRC check should be done
                               *    on the image or not:
                               *      0xA <EFBFBD> No CRC check required.
                               *      0xB <EFBFBD> Do CRC32 check on both header and
                               *            execution part of the image. */
  uint32_t imagelength;       /* 0x20    Total image length including header rounded
                               *    up to the nearest 512 byte boundary. In C
                               *    language the field can be computed as:
                               *    imagelength = (Actual length + 511) & ~0x1FF; */
  uint32_t releaseid;         /* 0x24    Release or version number of the image. Note,
                               *    this field is not used by boot ROM but is
                               *    provided to track the image versions. */
  uint32_t buildtime;         /* 0x28 Time (expressed in EPOC time format) at which
                               *    image is built. Note, this field is not used
                               *    by boot ROM but is provided to track the image
                               *    versions. */
  uint32_t sbzbootparameter;  /* 0x2c    hould be zero. */
  uint32_t cust_reserved[15]; /* 0x30-0x68: Reserved for customer use (60 bytes) */
  uint32_t header_crc32;      /* 0x6c CRC32 value of the header (bytes 0x00 to 0x6C
                               *    of the image). If the <EFBFBD>image_type<EFBFBD> is set
                               *    to <EFBFBD>0xA<EFBFBD>, this field is ignored by boot ROM. */
  uint32_t reserved1[4];      /* 0x70-0x7c: Should be zero. */
                              /* 0x80    Start of program code (128Kb max).  The final
                               *    image has to be padded to the nearest 512
                               *    byte boundary */
};

/****************************************************************************
 * Public Data
 ****************************************************************************/

/****************************************************************************
 * Public Functions Definitions
 ****************************************************************************/

extern uint32_t crc32part(const uint8_t *src, size_t len, uint32_t crc32val);
extern uint32_t crc32(const uint8_t *src, size_t len);

#endif /* __BOARDS_ARM_LPC31XX_EA3131_TOOLS_LPCHDR_H */