source: rtems/c/src/lib/libbsp/arm/shared/include/start.h @ 4ec210fe

4.11
Last change on this file since 4ec210fe was 4ec210fe, checked in by Sebastian Huber <sebastian.huber@…>, on Jan 13, 2014 at 12:18:26 PM

bsps/arm: Use ALIGN_WITH_INPUT

The ALIGN_WITH_INPUT helps to make this linker script more reliable.
See also:

https://sourceware.org/ml/binutils/2013-06/msg00246.html

https://sourceware.org/binutils/docs-2.24/ld/Forced-Output-Alignment.html#Forced-Output-Alignment

This reverts commit 4a9e52eefc510d7022ddc61c4ecde8db6b9a0217.

This reverts commit 1ab4f76900d012b5a9dbce2851add060f11ce13a.

  • Property mode set to 100644
File size: 3.0 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup arm_start
5 *
6 * @brief ARM system low level start.
7 */
8
9/*
10 * Copyright (c) 2008-2013 embedded brains GmbH.  All rights reserved.
11 *
12 *  embedded brains GmbH
13 *  Obere Lagerstr. 30
14 *  82178 Puchheim
15 *  Germany
16 *  <rtems@embedded-brains.de>
17 *
18 * The license and distribution terms for this file may be
19 * found in the file LICENSE in this distribution or at
20 * http://www.rtems.com/license/LICENSE.
21 */
22
23#ifndef LIBBSP_ARM_SHARED_START_H
24#define LIBBSP_ARM_SHARED_START_H
25
26#include <string.h>
27
28#include <bsp/linker-symbols.h>
29
30#ifdef __cplusplus
31extern "C" {
32#endif /* __cplusplus */
33
34/**
35 * @defgroup arm_start System Start
36 *
37 * @ingroup arm_shared
38 *
39 * @brief ARM system low level start.
40 *
41 * @{
42 */
43
44#define BSP_START_TEXT_SECTION __attribute__((section(".bsp_start_text")))
45
46#define BSP_START_DATA_SECTION __attribute__((section(".bsp_start_data")))
47
48/**
49* @brief System start entry.
50*/
51void _start(void);
52
53/**
54* @brief Start entry hook 0.
55*
56* This hook will be called from the start entry code after all modes and
57* stack pointers are initialized but before the copying of the exception
58* vectors.
59*/
60void bsp_start_hook_0(void);
61
62/**
63* @brief Start entry hook 1.
64*
65* This hook will be called from the start entry code after copying of the
66* exception vectors but before the call to boot_card().
67*/
68void bsp_start_hook_1(void);
69
70/**
71 * @brief Similar to standard memcpy().
72 *
73 * The memory areas must be word aligned.  Copy code will be executed from the
74 * stack.  If @a dest equals @a src nothing will be copied.
75 */
76void bsp_start_memcpy(int *dest, const int *src, size_t n);
77
78/**
79 * @brief ARM entry point to bsp_start_memcpy().
80 */
81void bsp_start_memcpy_arm(int *dest, const int *src, size_t n);
82
83/**
84 * @brief Copies all standard sections from the load to the runtime area.
85 */
86BSP_START_TEXT_SECTION static inline void bsp_start_copy_sections(void)
87{
88  /* Copy .text section */
89  bsp_start_memcpy(
90    (int *) bsp_section_text_begin,
91    (const int *) bsp_section_text_load_begin,
92    (size_t) bsp_section_text_size
93  );
94
95  /* Copy .rodata section */
96  bsp_start_memcpy(
97    (int *) bsp_section_rodata_begin,
98    (const int *) bsp_section_rodata_load_begin,
99    (size_t) bsp_section_rodata_size
100  );
101
102  /* Copy .data section */
103  bsp_start_memcpy(
104    (int *) bsp_section_data_begin,
105    (const int *) bsp_section_data_load_begin,
106    (size_t) bsp_section_data_size
107  );
108
109  /* Copy .fast_text section */
110  bsp_start_memcpy(
111    (int *) bsp_section_fast_text_begin,
112    (const int *) bsp_section_fast_text_load_begin,
113    (size_t) bsp_section_fast_text_size
114  );
115
116  /* Copy .fast_data section */
117  bsp_start_memcpy(
118    (int *) bsp_section_fast_data_begin,
119    (const int *) bsp_section_fast_data_load_begin,
120    (size_t) bsp_section_fast_data_size
121  );
122}
123
124BSP_START_TEXT_SECTION static inline void bsp_start_clear_bss(void)
125{
126  memset(bsp_section_bss_begin, 0, (size_t) bsp_section_bss_size);
127}
128
129/** @} */
130
131#ifdef __cplusplus
132}
133#endif /* __cplusplus */
134
135#endif /* LIBBSP_ARM_SHARED_START_H */
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