RTEMS: bsps/arm/include/bsp/start.h Source File

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start.h
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1
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.org/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
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* Many ARM boot loaders pass arguments to loaded OS kernel
50*/
51#ifdef BSP_START_HOOKS_WITH_LOADER_ARGS
52#define BSP_START_HOOKS_LOADER_ARGS int saved_psr, int saved_machid, int saved_dtb_adr
53#else
54#define BSP_START_HOOKS_LOADER_ARGS void
55#endif
56
60 void _start(void);
61
69 void bsp_start_hook_0(BSP_START_HOOKS_LOADER_ARGS);
70
77 void bsp_start_hook_1(BSP_START_HOOKS_LOADER_ARGS);
78
85 void bsp_start_memcpy(int *dest, const int *src, size_t n);
86
90 void bsp_start_memcpy_arm(int *dest, const int *src, size_t n);
91
95BSP_START_TEXT_SECTION static inline void bsp_start_copy_sections(void)
96{
97 /* Copy .text section */
98 bsp_start_memcpy(
99 (int *) bsp_section_text_begin,
100 (const int *) bsp_section_text_load_begin,
101 (size_t) bsp_section_text_size
102 );
103
104 /* Copy .rodata section */
105 bsp_start_memcpy(
106 (int *) bsp_section_rodata_begin,
107 (const int *) bsp_section_rodata_load_begin,
108 (size_t) bsp_section_rodata_size
109 );
110
111 /* Copy .data section */
112 bsp_start_memcpy(
113 (int *) bsp_section_data_begin,
114 (const int *) bsp_section_data_load_begin,
115 (size_t) bsp_section_data_size
116 );
117
118 /* Copy .fast_text section */
119 bsp_start_memcpy(
120 (int *) bsp_section_fast_text_begin,
121 (const int *) bsp_section_fast_text_load_begin,
122 (size_t) bsp_section_fast_text_size
123 );
124
125 /* Copy .fast_data section */
126 bsp_start_memcpy(
127 (int *) bsp_section_fast_data_begin,
128 (const int *) bsp_section_fast_data_load_begin,
129 (size_t) bsp_section_fast_data_size
130 );
131}
132
133BSP_START_TEXT_SECTION static inline void
134bsp_start_memcpy_libc(void *dest, const void *src, size_t n)
135{
136 if (dest != src) {
137 memcpy(dest, src, n);
138 }
139}
140
148BSP_START_TEXT_SECTION static inline void bsp_start_copy_sections_compact(void)
149{
150 /* Copy .data section */
151 bsp_start_memcpy_libc(
152 bsp_section_data_begin,
153 bsp_section_data_load_begin,
154 (size_t) bsp_section_data_size
155 );
156
157 /* Copy .fast_text section */
158 bsp_start_memcpy_libc(
159 bsp_section_fast_text_begin,
160 bsp_section_fast_text_load_begin,
161 (size_t) bsp_section_fast_text_size
162 );
163
164 /* Copy .fast_data section */
165 bsp_start_memcpy_libc(
166 bsp_section_fast_data_begin,
167 bsp_section_fast_data_load_begin,
168 (size_t) bsp_section_fast_data_size
169 );
170}
171
172BSP_START_TEXT_SECTION static inline void bsp_start_clear_bss(void)
173{
174 memset(bsp_section_bss_begin, 0, (size_t) bsp_section_bss_size);
175}
176
179#ifdef __cplusplus
180}
181#endif /* __cplusplus */
182
183#endif /* LIBBSP_ARM_SHARED_START_H */
_start
void _start(void)
System start entry.
bsp_start_memcpy_arm
void bsp_start_memcpy_arm(int *dest, const int *src, size_t n)
ARM entry point to bsp_start_memcpy().
bsp_start_memcpy
void bsp_start_memcpy(int *dest, const int *src, size_t n)
Similar to standard memcpy().