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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/**
* @file
*
* @brief Workspace Handler Support
* @ingroup RTEMSScoreWorkspace
*/
/*
* COPYRIGHT (c) 1989-2009.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/wkspace.h>
#include <rtems/score/assert.h>
#include <rtems/score/heapimpl.h>
#include <rtems/score/interr.h>
#include <rtems/score/threadimpl.h>
#include <rtems/posix/pthread.h>
#include <rtems/config.h>
#include <rtems/sysinit.h>
#include <string.h>
/* #define DEBUG_WORKSPACE */
#if defined(DEBUG_WORKSPACE)
#include <rtems/bspIo.h>
#endif
Heap_Control _Workspace_Area;
static void _Workspace_Initialize( void )
{
_Workspace_Handler_initialization( _Memory_Get(), _Heap_Extend );
}
RTEMS_SYSINIT_ITEM(
_Workspace_Initialize,
RTEMS_SYSINIT_WORKSPACE,
RTEMS_SYSINIT_ORDER_MIDDLE
);
void _Workspace_Handler_initialization(
const Memory_Information *mem,
Heap_Initialization_or_extend_handler extend
)
{
Heap_Initialization_or_extend_handler init_or_extend;
uintptr_t remaining;
bool unified;
uintptr_t page_size;
uintptr_t overhead;
size_t i;
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 = extend;
}
}
if ( remaining > 0 ) {
_Internal_error( INTERNAL_ERROR_TOO_LITTLE_WORKSPACE );
}
_Heap_Protection_set_delayed_free_fraction( &_Workspace_Area, 1 );
}
void *_Workspace_Allocate(
size_t size
)
{
void *memory;
memory = _Heap_Allocate( &_Workspace_Area, size );
#if defined(DEBUG_WORKSPACE)
printk(
"Workspace_Allocate(%d) from %p/%p -> %p\n",
size,
__builtin_return_address( 0 ),
__builtin_return_address( 1 ),
memory
);
#endif
return memory;
}
/*
* _Workspace_Free
*/
void _Workspace_Free(
void *block
)
{
#if defined(DEBUG_WORKSPACE)
printk(
"Workspace_Free(%p) from %p/%p\n",
block,
__builtin_return_address( 0 ),
__builtin_return_address( 1 )
);
#endif
_Heap_Free( &_Workspace_Area, block );
}
|
