1 /*
2 * Copyright (c) 2013 - 2014, Freescale Semiconductor, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * o Redistributions of source code must retain the above copyright notice, this list
9 * of conditions and the following disclaimer.
10 *
11 * o Redistributions in binary form must reproduce the above copyright notice, this
12 * list of conditions and the following disclaimer in the documentation and/or
13 * other materials provided with the distribution.
14 *
15 * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from this
17 * software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 #include <stdint.h>
31 #include "startup.h"
32
33 /*******************************************************************************
34 * Code
35 ******************************************************************************/
36
init_data_bss(void)37 void init_data_bss(void)
38 {
39 extern char __bss_start[];
40 extern char __bss_end[];
41
42 /* Declare a counter we'll use in all of the copy loops */
43 uint32_t n;
44
45 uint8_t * bss_start, * bss_end;
46
47 bss_start = (uint8_t *)__bss_start;
48 bss_end = (uint8_t *)__bss_end;
49
50 /* Clear the zero-initialized data section */
51 n = bss_end - bss_start;
52 while(n--)
53 {
54 *bss_start++ = 0;
55 }
56 }
57
58 /*******************************************************************************
59 * EOF
60 ******************************************************************************/
61
62