1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup rtems_bsd_rtems |
---|
5 | * |
---|
6 | * @brief TODO. |
---|
7 | */ |
---|
8 | |
---|
9 | /* |
---|
10 | * Copyright (c) 2013 embedded brains GmbH. All rights reserved. |
---|
11 | * |
---|
12 | * embedded brains GmbH |
---|
13 | * Dornierstr. 4 |
---|
14 | * 82178 Puchheim |
---|
15 | * Germany |
---|
16 | * <rtems@embedded-brains.de> |
---|
17 | * |
---|
18 | * Redistribution and use in source and binary forms, with or without |
---|
19 | * modification, are permitted provided that the following conditions |
---|
20 | * are met: |
---|
21 | * 1. Redistributions of source code must retain the above copyright |
---|
22 | * notice, this list of conditions and the following disclaimer. |
---|
23 | * 2. Redistributions in binary form must reproduce the above copyright |
---|
24 | * notice, this list of conditions and the following disclaimer in the |
---|
25 | * documentation and/or other materials provided with the distribution. |
---|
26 | * |
---|
27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
---|
28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
---|
31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
---|
32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
---|
33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
---|
34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
---|
35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
---|
36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
---|
37 | * SUCH DAMAGE. |
---|
38 | */ |
---|
39 | |
---|
40 | #include <machine/rtems-bsd-kernel-space.h> |
---|
41 | #include <machine/rtems-bsd-chunk.h> |
---|
42 | |
---|
43 | #include <rtems/bsd/sys/param.h> |
---|
44 | #include <sys/malloc.h> |
---|
45 | |
---|
46 | #include <rtems/score/apimutex.h> |
---|
47 | |
---|
48 | #define chunk_of_node(n) ((rtems_bsd_chunk_info *) n) |
---|
49 | |
---|
50 | static int |
---|
51 | chunk_compare(const rtems_rbtree_node *a, const rtems_rbtree_node *b) |
---|
52 | { |
---|
53 | const rtems_bsd_chunk_info *left = chunk_of_node(a); |
---|
54 | const rtems_bsd_chunk_info *right = chunk_of_node(b); |
---|
55 | |
---|
56 | if (left->begin < right->begin) { |
---|
57 | return -1; |
---|
58 | } else if (left->begin < right->end) { |
---|
59 | return 0; |
---|
60 | } else { |
---|
61 | return 1; |
---|
62 | } |
---|
63 | } |
---|
64 | |
---|
65 | void |
---|
66 | rtems_bsd_chunk_init(rtems_bsd_chunk_control *self, uintptr_t info_size, |
---|
67 | rtems_bsd_chunk_info_ctor info_ctor, rtems_bsd_chunk_info_dtor info_dtor) |
---|
68 | { |
---|
69 | info_size = roundup(info_size, CPU_HEAP_ALIGNMENT); |
---|
70 | |
---|
71 | self->info_size = info_size; |
---|
72 | self->info_ctor = info_ctor; |
---|
73 | self->info_dtor = info_dtor; |
---|
74 | rtems_rbtree_initialize_empty(&self->chunks, chunk_compare, true); |
---|
75 | } |
---|
76 | |
---|
77 | void * |
---|
78 | rtems_bsd_chunk_alloc(rtems_bsd_chunk_control *self, uintptr_t chunk_size) |
---|
79 | { |
---|
80 | char *p = malloc(chunk_size + self->info_size, M_TEMP, M_WAITOK); |
---|
81 | |
---|
82 | if (p != NULL) { |
---|
83 | rtems_bsd_chunk_info *info = (rtems_bsd_chunk_info *) p; |
---|
84 | |
---|
85 | p += self->info_size; |
---|
86 | |
---|
87 | info->begin = (uintptr_t) p; |
---|
88 | info->end = (uintptr_t) p + chunk_size; |
---|
89 | |
---|
90 | (*self->info_ctor)(self, info); |
---|
91 | |
---|
92 | _RTEMS_Lock_allocator(); |
---|
93 | rtems_rbtree_insert(&self->chunks, &info->node); |
---|
94 | _RTEMS_Unlock_allocator(); |
---|
95 | } |
---|
96 | |
---|
97 | return p; |
---|
98 | } |
---|
99 | |
---|
100 | void |
---|
101 | rtems_bsd_chunk_free(rtems_bsd_chunk_control *self, |
---|
102 | void *some_addr_in_chunk) |
---|
103 | { |
---|
104 | rtems_bsd_chunk_info *info = rtems_bsd_chunk_get_info(self, |
---|
105 | some_addr_in_chunk); |
---|
106 | |
---|
107 | _RTEMS_Lock_allocator(); |
---|
108 | rtems_rbtree_extract(&self->chunks, &info->node); |
---|
109 | _RTEMS_Unlock_allocator(); |
---|
110 | |
---|
111 | (*self->info_dtor)(self, info); |
---|
112 | |
---|
113 | free(info, M_TEMP); |
---|
114 | } |
---|
115 | |
---|
116 | rtems_bsd_chunk_info * |
---|
117 | rtems_bsd_chunk_get_info(rtems_bsd_chunk_control *self, |
---|
118 | void *some_addr_in_chunk) |
---|
119 | { |
---|
120 | rtems_bsd_chunk_info find_me = { |
---|
121 | .begin = (uintptr_t) some_addr_in_chunk |
---|
122 | }; |
---|
123 | |
---|
124 | return chunk_of_node(rtems_rbtree_find(&self->chunks, |
---|
125 | &find_me.node)); |
---|
126 | } |
---|
127 | |
---|
128 | void * |
---|
129 | rtems_bsd_chunk_get_begin(rtems_bsd_chunk_control *self, |
---|
130 | void *some_addr_in_chunk) |
---|
131 | { |
---|
132 | rtems_bsd_chunk_info *info = rtems_bsd_chunk_get_info(self, |
---|
133 | some_addr_in_chunk); |
---|
134 | |
---|
135 | return (void *) info->begin; |
---|
136 | } |
---|
137 | |
---|
138 | void |
---|
139 | rtems_bsd_chunk_info_dtor_default(rtems_bsd_chunk_control *self, |
---|
140 | rtems_bsd_chunk_info *info) |
---|
141 | { |
---|
142 | (void) self; |
---|
143 | (void) info; |
---|
144 | } |
---|