Zephyr API Documentation
4.0.99
A Scalable Open Source RTOS
Loading...
Searching...
No Matches
app_memdomain.h
Go to the documentation of this file.
1
/*
2
* Copyright (c) 2019 Intel Corporation
3
*
4
* SPDX-License-Identifier: Apache-2.0
5
*/
6
#ifndef ZEPHYR_INCLUDE_APP_MEMORY_APP_MEMDOMAIN_H_
7
#define ZEPHYR_INCLUDE_APP_MEMORY_APP_MEMDOMAIN_H_
8
9
#include <
zephyr/linker/linker-defs.h
>
10
#include <
zephyr/sys/dlist.h
>
11
#include <
zephyr/kernel.h
>
12
20
#ifdef CONFIG_USERSPACE
21
30
#define K_APP_DMEM_SECTION(id) data_smem_##id##_data
31
40
#define K_APP_BMEM_SECTION(id) data_smem_##id##_bss
41
51
#define K_APP_DMEM(id) Z_GENERIC_SECTION(K_APP_DMEM_SECTION(id))
52
61
#define K_APP_BMEM(id) Z_GENERIC_SECTION(K_APP_BMEM_SECTION(id))
62
63
struct
z_app_region {
64
void
*bss_start;
65
size_t
bss_size;
66
};
67
68
#define Z_APP_START(id) z_data_smem_##id##_part_start
69
#define Z_APP_SIZE(id) z_data_smem_##id##_part_size
70
#define Z_APP_BSS_START(id) z_data_smem_##id##_bss_start
71
#define Z_APP_BSS_SIZE(id) z_data_smem_##id##_bss_size
72
73
/* If a partition is declared with K_APPMEM_PARTITION, but never has any
74
* data assigned to its contents, then no symbols with its prefix will end
75
* up in the symbol table. This prevents gen_app_partitions.py from detecting
76
* that the partition exists, and the linker symbols which specify partition
77
* bounds will not be generated, resulting in build errors.
78
*
79
* What this inline assembly code does is define a symbol with no data.
80
* This should work for all arches that produce ELF binaries, see
81
* https://sourceware.org/binutils/docs/as/Section.html
82
*
83
* We don't know what active flags/type of the pushed section were, so we are
84
* specific: "aw" indicates section is allocatable and writable,
85
* and "@progbits" indicates the section has data.
86
*/
87
#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
88
/* ARM has a quirk in that '@' denotes a comment, so we have to send
89
* %progbits to the assembler instead.
90
*/
91
#define Z_PROGBITS_SYM "%"
92
#else
93
#define Z_PROGBITS_SYM "@"
94
#endif
95
96
#if defined(CONFIG_ARC) && defined(__CCAC__)
97
/* ARC MWDT assembler has slightly different pushsection/popsection directives
98
* names.
99
*/
100
#define Z_PUSHSECTION_DIRECTIV ".pushsect"
101
#define Z_POPSECTION_DIRECTIVE ".popsect"
102
#else
103
#define Z_PUSHSECTION_DIRECTIV ".pushsection"
104
#define Z_POPSECTION_DIRECTIVE ".popsection"
105
#endif
106
107
#define Z_APPMEM_PLACEHOLDER(name) \
108
__asm__ ( \
109
Z_PUSHSECTION_DIRECTIV " " STRINGIFY(K_APP_DMEM_SECTION(name)) \
110
",\"aw\"," Z_PROGBITS_SYM "progbits\n\t" \
111
".global " STRINGIFY(name) "_placeholder\n\t" \
112
STRINGIFY(name) "_placeholder:\n\t" \
113
Z_POPSECTION_DIRECTIVE "\n\t")
114
127
#define K_APPMEM_PARTITION_DEFINE(name) \
128
extern char Z_APP_START(name)[]; \
129
extern char Z_APP_SIZE(name)[]; \
130
struct k_mem_partition name = { \
131
.start = (uintptr_t) &Z_APP_START(name)[0], \
132
.size = (size_t) &Z_APP_SIZE(name)[0], \
133
.attr = K_MEM_PARTITION_P_RW_U_RW \
134
}; \
135
extern char Z_APP_BSS_START(name)[]; \
136
extern char Z_APP_BSS_SIZE(name)[]; \
137
Z_GENERIC_SECTION(.app_regions.name) \
138
const struct z_app_region name##_region = { \
139
.bss_start = &Z_APP_BSS_START(name)[0], \
140
.bss_size = (size_t) &Z_APP_BSS_SIZE(name)[0] \
141
}; \
142
Z_APPMEM_PLACEHOLDER(name)
143
#else
144
145
#define K_APP_BMEM(ptn)
146
#define K_APP_DMEM(ptn)
147
#define K_APP_DMEM_SECTION(ptn) .data
148
#define K_APP_BMEM_SECTION(ptn) .bss
149
#define K_APPMEM_PARTITION_DEFINE(name)
150
151
#endif
/* CONFIG_USERSPACE */
152
157
#endif
/* ZEPHYR_INCLUDE_APP_MEMORY_APP_MEMDOMAIN_H_ */
dlist.h
kernel.h
Public kernel APIs.
linker-defs.h
zephyr
app_memory
app_memdomain.h
Generated on Thu Nov 21 2024 21:02:48 for Zephyr API Documentation by
1.12.0