lpc32xx/start/boot.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup lpc32xx_boot
0007  *
0008  * @brief Boot support implementation.
0009  */
0010
0011 /*
0012  * Copyright (c) 2010 embedded brains GmbH & Co. KG
0013  *
0014  * Redistribution and use in source and binary forms, with or without
0015  * modification, are permitted provided that the following conditions
0016  * are met:
0017  * 1. Redistributions of source code must retain the above copyright
0018  *    notice, this list of conditions and the following disclaimer.
0019  * 2. Redistributions in binary form must reproduce the above copyright
0020  *    notice, this list of conditions and the following disclaimer in the
0021  *    documentation and/or other materials provided with the distribution.
0022  *
0023  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0024  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0026  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0027  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0028  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0029  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0030  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0031  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0032  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0033  * POSSIBILITY OF SUCH DAMAGE.
0034  */
0035
0036 #include <string.h>
0037
0038 #include <bsp/boot.h>
0039
0040 void lpc32xx_setup_boot_block(
0041   lpc32xx_boot_block *boot_block,
0042   uint8_t icr,
0043   uint8_t page_count
0044 )
0045 {
0046   memset(boot_block, 0, sizeof(*boot_block));
0047
0048   ++page_count;
0049
0050   boot_block->field.d0 = icr;
0051   boot_block->field.d2 = icr;
0052   boot_block->field.d4 = page_count;
0053   boot_block->field.d6 = page_count;
0054   boot_block->field.d8 = page_count;
0055   boot_block->field.d10 = page_count;
0056
0057   icr = (uint8_t) ~((unsigned) icr);
0058   page_count = (uint8_t) ~((unsigned) page_count);
0059
0060   boot_block->field.d1 = icr;
0061   boot_block->field.d3 = icr;
0062   boot_block->field.d5 = page_count;
0063   boot_block->field.d7 = page_count;
0064   boot_block->field.d9 = page_count;
0065   boot_block->field.d11 = page_count;
0066
0067   boot_block->field.d12 = 0xaa;
0068 }
0069
0070 void lpc32xx_set_boot_block_bad(
0071   lpc32xx_boot_block *boot_block
0072 )
0073 {
0074   boot_block->field.d12 = 0;
0075 }