1 /**
2 * @file rm_osal.h
3 *
4 * @brief
5 * This is the sample OS Adaptation layer which is used by the RM low level
6 * driver. The OSAL layer can be ported in either of the following
7 * manners to a native OS:
8 *
9 * <b> Approach 1: </b>
10 * @n Use Prebuilt Libraries
11 * - Ensure that the provide an implementation of all
12 * Osal_XXX API for their native OS.
13 * - Link the prebuilt libraries with their application.
14 * - Refer to the "example" directory for an example of this
15 * @n <b> Pros: </b>
16 * - Customers can reuse prebuilt TI provided libraries
17 * @n <b> Cons: </b>
18 * - Level of indirection in the API to get to the actual OS call
19 *
20 * <b> Approach 2: </b>
21 * @n Rebuilt Library
22 * - Create a copy of this file and modify it to directly
23 * inline the native OS calls
24 * - Rebuild the RM low level drivver library; ensure that the Include
25 * path points to the directory where the copy of this file
26 * has been provided.
27 * - Please refer to the "test" directory for an example of this
28 * @n <b> Pros: </b>
29 * - Optimizations can be done to remove the level of indirection
30 * @n <b> Cons: </b>
31 * - RM LLD Libraries need to be rebuilt by the customer.
32 *
33 * \par
34 * NOTE:
35 * (C) Copyright 2012 Texas Instruments, Inc.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 *
41 * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 *
44 * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the
47 * distribution.
48 *
49 * Neither the name of Texas Instruments Incorporated nor the names of
50 * its contributors may be used to endorse or promote products derived
51 * from this software without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *
65 * \par
66 */
67 #ifndef __RM_OSAL_H__
68 #define __RM_OSAL_H__
70 /** @addtogroup RM_LLD_OSAL
71 @{ */
73 /**********************************************************************
74 ************************* Extern Declarations ************************
75 **********************************************************************/
77 /* #include <string.h> is here because there used to be
78 * memcpy/memset prototypes here. This #include prevents warnings in
79 * other code that unintentionally worked because of these prototypes
80 */
81 #include <string.h>
82 #include <xdc/runtime/System.h>
85 extern void* Osal_rmMalloc (uint32_t num_bytes);
86 extern void Osal_rmFree (void *ptr, uint32_t size, bool shared);
87 extern void* Osal_rmCsEnter (void);
88 extern void Osal_rmCsExit (void *CsHandle);
89 extern void* Osal_rmMtCsEnter (void);
90 extern void Osal_rmMtCsExit (void *CsHandle);
91 //extern void Osal_rmLog (char *fmt, ... );
92 extern void Osal_rmBeginMemAccess (void *ptr, uint32_t size);
93 extern void Osal_rmEndMemAccess (void *ptr, uint32_t size);
95 /**
96 * @brief The macro is used by the RM LLD to allocate memory of specified
97 * size
98 *
99 * <b> Prototype: </b>
100 * The following is the C prototype for the expected OSAL API.
101 *
102 * @verbatim
103 void* Osal_rmMalloc (uint32_t numBytes)
104 @endverbatim
105 *
106 * <b> Parameter </b>
107 * @n Number of bytes to be allocated
108 *
109 * <b> Parameter </b>
110 * @n If true the memory should could from shared memory
111 *
112 * <b> Return Value </b>
113 * @n Pointer to the allocated block size
114 */
116 #define Rm_osalMalloc Osal_rmMalloc
118 /**
119 * @brief The macro is used by the RM LLD to free a allocated block of
120 * memory
121 *
122 * <b> Prototype: </b>
123 * The following is the C prototype for the expected OSAL API.
124 *
125 * @verbatim
126 void Osal_rmFree (void *ptr, uint32_t size)
127 @endverbatim
128 *
129 * <b> Parameter </b>
130 * @n Pointer to the block of memory to be cleaned up.
131 * @n Size of the allocated memory which is being freed.
132 *
133 * <b> Return Value </b>
134 * @n Not applicable.
135 */
137 #define Rm_osalFree Osal_rmFree
139 /**
140 * @brief The macro is used by the RM LLD to provide critical sections to
141 * protect global and shared variables from
142 *
143 * access from multiple cores
144 * and
145 * access from multiple threads on single core
146 *
147 * <b> Prototype: </b>
148 * The following is the C prototype for the expected OSAL API.
149 *
150 * @verbatim
151 void* Osal_rmCsEnter (void)
152 @endverbatim
153 *
154 * <b> Parameter </b>
155 * @n None.
156 *
157 * <b> Return Value </b>
158 * @n Handle used to lock critical section.
159 */
160 #define Rm_osalCsEnter Osal_rmCsEnter
162 /**
163 * @brief The macro is used by the RM LLD to exit a critical section
164 * protected using Osal_rmCsEnter() API.
165 *
166 * <b> Prototype: </b>
167 * The following is the C prototype for the expected OSAL API.
168 *
169 * @verbatim
170 void Osal_rmCsExit (void *CsHandle)
171 @endverbatim
172 *
173 * <b> Parameter </b>
174 * @n Handle for unlocking critical section.
175 *
176 * <b> Return Value </b>
177 * @n Not applicable.
178 */
179 #define Rm_osalCsExit Osal_rmCsExit
181 /**
182 * @brief The macro is used by the RM LLD to provide critical sections to
183 * protect global and shared variables from
184 *
185 * access from multiple threads on single core
186 *
187 * <b> Prototype: </b>
188 * The following is the C prototype for the expected OSAL API.
189 *
190 * @verbatim
191 void* Osal_rmMtCsEnter (void)
192 @endverbatim
193 *
194 * <b> Parameter </b>
195 * @n None.
196 *
197 * <b> Return Value </b>
198 * @n Handle used to lock critical section.
199 */
200 #define Rm_osalMtCsEnter Osal_rmMtCsEnter
202 /**
203 * @brief The macro is used by the RM LLD to exit a critical section
204 * protected using Osal_rmMtCsEnter() API.
205 *
206 * <b> Prototype: </b>
207 * The following is the C prototype for the expected OSAL API.
208 *
209 * @verbatim
210 void Osal_rmMtCsExit (void *CsHandle)
211 @endverbatim
212 *
213 * <b> Parameter </b>
214 * @n Handle for unlocking critical section.
215 *
216 * <b> Return Value </b>
217 * @n Not applicable.
218 */
219 #define Rm_osalMtCsExit Osal_rmMtCsExit
221 /**
222 * @brief The macro is used by the RM LLD to log various
223 * messages.
224 *
225 * <b> Prototype: </b>
226 * The following is the C prototype for the expected OSAL API.
227 *
228 * @verbatim
229 void Osal_rmLog( char *fmt, ... )
230 @endverbatim
231 *
232 * <b> Parameter </b>
233 * @n printf-style format string
234 *
235 * <b> Return Value </b>
236 * @n Not applicable.
237 */
238 #define Rm_osalLog System_printf
240 /**
241 * @brief The macro is used by the RM LLD to indicate that a block
242 * of memory is about to be accessed. If the memory block is cached then
243 * this indicates that the application would need to ensure that the cache
244 * is updated with the data from the actual memory.
245 *
246 * <b> Prototype: </b>
247 * The following is the C prototype for the expected OSAL API.
248 *
249 * @verbatim
250 void Osal_rmBeginMemAccess (void *ptr, uint32_t size)
251 @endverbatim
252 *
253 * <b> Parameter </b>
254 * @n Address of memory block.
255 * @n Size of memory block.
256 *
257 * <b> Return Value </b>
258 * @n Not applicable.
259 */
260 #define Rm_osalBeginMemAccess Osal_rmBeginMemAccess
262 /**
263 * @brief The macro is used by the RM LLD to indicate that the block of
264 * memory has finished being accessed. If the memory block is cached then the
265 * application would need to ensure that the contents of the cache are updated
266 * immediately to the actual memory.
267 *
268 * <b> Prototype: </b>
269 * The following is the C prototype for the expected OSAL API.
270 *
271 * @verbatim
272 void Osal_rmEndMemAccess (void *ptr, uint32_t size)
273 @endverbatim
274 *
275 * <b> Parameter </b>
276 * @n Address of memory block.
277 * @n Size of memory block.
278 *
279 * <b> Return Value </b>
280 * @n Not applicable.
281 */
282 #define Rm_osalEndMemAccess Osal_rmEndMemAccess
284 /**
285 @}
286 */
287 #endif /* __RM_OSAL_H__ */