1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreWorkspace
*
* @brief Workspace Handler Initialization API
*/
/*
* Copyright (C) 2012, 2020 embedded brains GmbH (http://www.embedded-brains.de)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTEMS_SCORE_WKSPACEINITMANY_H
#define _RTEMS_SCORE_WKSPACEINITMANY_H
#include <rtems/score/wkspace.h>
#include <rtems/score/heapimpl.h>
#include <rtems/score/interr.h>
#include <rtems/score/memory.h>
#include <rtems/config.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @addtogroup RTEMSScoreWorkspace
*
* @{
*/
RTEMS_INLINE_ROUTINE void _Workspace_Initialize_with_many_areas( void )
{
const Memory_Information *mem;
Heap_Initialization_or_extend_handler init_or_extend;
uintptr_t remaining;
bool unified;
uintptr_t page_size;
uintptr_t overhead;
size_t i;
mem = _Memory_Get();
page_size = CPU_HEAP_ALIGNMENT;
remaining = rtems_configuration_get_work_space_size();
init_or_extend = _Heap_Initialize;
unified = rtems_configuration_get_unified_work_area();
overhead = _Heap_Area_overhead( page_size );
for ( i = 0; i < _Memory_Get_count( mem ); ++i ) {
Memory_Area *area;
uintptr_t free_size;
area = _Memory_Get_area( mem, i );
free_size = _Memory_Get_free_size( area );
if ( free_size > overhead ) {
uintptr_t space_available;
uintptr_t size;
if ( unified ) {
size = free_size;
} else {
if ( remaining > 0 ) {
size = remaining < free_size - overhead ?
remaining + overhead : free_size;
} else {
size = 0;
}
}
space_available = ( *init_or_extend )(
&_Workspace_Area,
_Memory_Get_free_begin( area ),
size,
page_size
);
_Memory_Consume( area, size );
if ( space_available < remaining ) {
remaining -= space_available;
} else {
remaining = 0;
}
init_or_extend = _Heap_Extend;
}
}
if ( remaining > 0 ) {
_Internal_error( INTERNAL_ERROR_TOO_LITTLE_WORKSPACE );
}
_Heap_Protection_set_delayed_free_fraction( &_Workspace_Area, 1 );
}
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* _RTEMS_SCORE_WKSPACEINITMANY_H */
|