Blame view

kernel/linux-rt-4.4.41/arch/mips/include/asm/octeon/cvmx-bootmem.h 12.9 KB
5113f6f70   김현기   kernel add
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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
  /***********************license start***************
   * Author: Cavium Networks
   *
   * Contact: support@caviumnetworks.com
   * This file is part of the OCTEON SDK
   *
   * Copyright (c) 2003-2008 Cavium Networks
   *
   * This file is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, Version 2, as
   * published by the Free Software Foundation.
   *
   * This file is distributed in the hope that it will be useful, but
   * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
   * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
   * NONINFRINGEMENT.  See the GNU General Public License for more
   * details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this file; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
   * or visit http://www.gnu.org/licenses/.
   *
   * This file may also be available under a different license from Cavium.
   * Contact Cavium Networks for more information
   ***********************license end**************************************/
  
  /*
   * Simple allocate only memory allocator.  Used to allocate memory at
   * application start time.
   */
  
  #ifndef __CVMX_BOOTMEM_H__
  #define __CVMX_BOOTMEM_H__
  /* Must be multiple of 8, changing breaks ABI */
  #define CVMX_BOOTMEM_NAME_LEN 128
  
  /* Can change without breaking ABI */
  #define CVMX_BOOTMEM_NUM_NAMED_BLOCKS 64
  
  /* minimum alignment of bootmem alloced blocks */
  #define CVMX_BOOTMEM_ALIGNMENT_SIZE	(16ull)
  
  /* Flags for cvmx_bootmem_phy_mem* functions */
  /* Allocate from end of block instead of beginning */
  #define CVMX_BOOTMEM_FLAG_END_ALLOC    (1 << 0)
  
  /* Don't do any locking. */
  #define CVMX_BOOTMEM_FLAG_NO_LOCKING   (1 << 1)
  
  /* First bytes of each free physical block of memory contain this structure,
   * which is used to maintain the free memory list.  Since the bootloader is
   * only 32 bits, there is a union providing 64 and 32 bit versions.  The
   * application init code converts addresses to 64 bit addresses before the
   * application starts.
   */
  struct cvmx_bootmem_block_header {
  	/*
  	 * Note: these are referenced from assembly routines in the
  	 * bootloader, so this structure should not be changed
  	 * without changing those routines as well.
  	 */
  	uint64_t next_block_addr;
  	uint64_t size;
  
  };
  
  /*
   * Structure for named memory blocks.  Number of descriptors available
   * can be changed without affecting compatibility, but name length
   * changes require a bump in the bootmem descriptor version Note: This
   * structure must be naturally 64 bit aligned, as a single memory
   * image will be used by both 32 and 64 bit programs.
   */
  struct cvmx_bootmem_named_block_desc {
  	/* Base address of named block */
  	uint64_t base_addr;
  	/*
  	 * Size actually allocated for named block (may differ from
  	 * requested).
  	 */
  	uint64_t size;
  	/* name of named block */
  	char name[CVMX_BOOTMEM_NAME_LEN];
  };
  
  /* Current descriptor versions */
  /* CVMX bootmem descriptor major version */
  #define CVMX_BOOTMEM_DESC_MAJ_VER   3
  
  /* CVMX bootmem descriptor minor version */
  #define CVMX_BOOTMEM_DESC_MIN_VER   0
  
  /* First three members of cvmx_bootmem_desc_t are left in original
   * positions for backwards compatibility.
   */
  struct cvmx_bootmem_desc {
  #if defined(__BIG_ENDIAN_BITFIELD) || defined(CVMX_BUILD_FOR_LINUX_HOST)
  	/* spinlock to control access to list */
  	uint32_t lock;
  	/* flags for indicating various conditions */
  	uint32_t flags;
  	uint64_t head_addr;
  
  	/* Incremented when incompatible changes made */
  	uint32_t major_version;
  
  	/*
  	 * Incremented changed when compatible changes made, reset to
  	 * zero when major incremented.
  	 */
  	uint32_t minor_version;
  
  	uint64_t app_data_addr;
  	uint64_t app_data_size;
  
  	/* number of elements in named blocks array */
  	uint32_t named_block_num_blocks;
  
  	/* length of name array in bootmem blocks */
  	uint32_t named_block_name_len;
  	/* address of named memory block descriptors */
  	uint64_t named_block_array_addr;
  #else                           /* __LITTLE_ENDIAN */
  	uint32_t flags;
  	uint32_t lock;
  	uint64_t head_addr;
  
  	uint32_t minor_version;
  	uint32_t major_version;
  	uint64_t app_data_addr;
  	uint64_t app_data_size;
  
  	uint32_t named_block_name_len;
  	uint32_t named_block_num_blocks;
  	uint64_t named_block_array_addr;
  #endif
  };
  
  /**
   * Initialize the boot alloc memory structures. This is
   * normally called inside of cvmx_user_app_init()
   *
   * @mem_desc_ptr:	Address of the free memory list
   */
  extern int cvmx_bootmem_init(void *mem_desc_ptr);
  
  /**
   * Allocate a block of memory from the free list that was passed
   * to the application by the bootloader.
   * This is an allocate-only algorithm, so freeing memory is not possible.
   *
   * @size:      Size in bytes of block to allocate
   * @alignment: Alignment required - must be power of 2
   *
   * Returns pointer to block of memory, NULL on error
   */
  extern void *cvmx_bootmem_alloc(uint64_t size, uint64_t alignment);
  
  /**
   * Allocate a block of memory from the free list that was
   * passed to the application by the bootloader at a specific
   * address. This is an allocate-only algorithm, so
   * freeing memory is not possible. Allocation will fail if
   * memory cannot be allocated at the specified address.
   *
   * @size:      Size in bytes of block to allocate
   * @address:   Physical address to allocate memory at.	If this memory is not
   *		    available, the allocation fails.
   * @alignment: Alignment required - must be power of 2
   * Returns pointer to block of memory, NULL on error
   */
  extern void *cvmx_bootmem_alloc_address(uint64_t size, uint64_t address,
  					uint64_t alignment);
  
  /**
   * Allocate a block of memory from the free list that was
   * passed to the application by the bootloader within a specified
   * address range. This is an allocate-only algorithm, so
   * freeing memory is not possible. Allocation will fail if
   * memory cannot be allocated in the requested range.
   *
   * @size:      Size in bytes of block to allocate
   * @min_addr:  defines the minimum address of the range
   * @max_addr:  defines the maximum address of the range
   * @alignment: Alignment required - must be power of 2
   * Returns pointer to block of memory, NULL on error
   */
  extern void *cvmx_bootmem_alloc_range(uint64_t size, uint64_t alignment,
  				      uint64_t min_addr, uint64_t max_addr);
  
  /**
   * Frees a previously allocated named bootmem block.
   *
   * @name:   name of block to free
   *
   * Returns 0 on failure,
   *	   !0 on success
   */
  
  
  /**
   * Allocate a block of memory from the free list that was passed
   * to the application by the bootloader, and assign it a name in the
   * global named block table.  (part of the cvmx_bootmem_descriptor_t structure)
   * Named blocks can later be freed.
   *
   * @size:      Size in bytes of block to allocate
   * @alignment: Alignment required - must be power of 2
   * @name:      name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes
   *
   * Returns a pointer to block of memory, NULL on error
   */
  extern void *cvmx_bootmem_alloc_named(uint64_t size, uint64_t alignment,
  				      char *name);
  
  
  
  /**
   * Allocate a block of memory from the free list that was passed
   * to the application by the bootloader, and assign it a name in the
   * global named block table.  (part of the cvmx_bootmem_descriptor_t structure)
   * Named blocks can later be freed.
   *
   * @size:     Size in bytes of block to allocate
   * @address:  Physical address to allocate memory at.  If this
   *	      memory is not available, the allocation fails.
   * @name:     name of block - must be less than CVMX_BOOTMEM_NAME_LEN
   *	      bytes
   *
   * Returns a pointer to block of memory, NULL on error
   */
  extern void *cvmx_bootmem_alloc_named_address(uint64_t size, uint64_t address,
  					      char *name);
  
  
  
  /**
   * Allocate a block of memory from a specific range of the free list
   * that was passed to the application by the bootloader, and assign it
   * a name in the global named block table.  (part of the
   * cvmx_bootmem_descriptor_t structure) Named blocks can later be
   * freed.  If request cannot be satisfied within the address range
   * specified, NULL is returned
   *
   * @size:      Size in bytes of block to allocate
   * @min_addr:  minimum address of range
   * @max_addr:  maximum address of range
   * @align:     Alignment of memory to be allocated. (must be a power of 2)
   * @name:      name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes
   *
   * Returns a pointer to block of memory, NULL on error
   */
  extern void *cvmx_bootmem_alloc_named_range(uint64_t size, uint64_t min_addr,
  					    uint64_t max_addr, uint64_t align,
  					    char *name);
  
  extern int cvmx_bootmem_free_named(char *name);
  
  /**
   * Finds a named bootmem block by name.
   *
   * @name:   name of block to free
   *
   * Returns pointer to named block descriptor on success
   *	   0 on failure
   */
  struct cvmx_bootmem_named_block_desc *cvmx_bootmem_find_named_block(char *name);
  
  /**
   * Allocates a block of physical memory from the free list, at
   * (optional) requested address and alignment.
   *
   * @req_size: size of region to allocate.  All requests are rounded up
   *	      to be a multiple CVMX_BOOTMEM_ALIGNMENT_SIZE bytes size
   *
   * @address_min: Minimum address that block can occupy.
   *
   * @address_max: Specifies the maximum address_min (inclusive) that
   *		 the allocation can use.
   *
   * @alignment: Requested alignment of the block.  If this alignment
   *	       cannot be met, the allocation fails.  This must be a
   *	       power of 2.  (Note: Alignment of
   *	       CVMX_BOOTMEM_ALIGNMENT_SIZE bytes is required, and
   *	       internally enforced.  Requested alignments of less than
   *	       CVMX_BOOTMEM_ALIGNMENT_SIZE are set to
   *	       CVMX_BOOTMEM_ALIGNMENT_SIZE.)
   *
   * @flags:     Flags to control options for the allocation.
   *
   * Returns physical address of block allocated, or -1 on failure
   */
  int64_t cvmx_bootmem_phy_alloc(uint64_t req_size, uint64_t address_min,
  			       uint64_t address_max, uint64_t alignment,
  			       uint32_t flags);
  
  /**
   * Allocates a named block of physical memory from the free list, at
   * (optional) requested address and alignment.
   *
   * @param size	    size of region to allocate.	 All requests are rounded
   *		    up to be a multiple CVMX_BOOTMEM_ALIGNMENT_SIZE
   *		    bytes size
   * @param min_addr Minimum address that block can occupy.
   * @param max_addr  Specifies the maximum address_min (inclusive) that
   *		    the allocation can use.
   * @param alignment Requested alignment of the block.  If this
   *		    alignment cannot be met, the allocation fails.
   *		    This must be a power of 2.	(Note: Alignment of
   *		    CVMX_BOOTMEM_ALIGNMENT_SIZE bytes is required, and
   *		    internally enforced.  Requested alignments of less
   *		    than CVMX_BOOTMEM_ALIGNMENT_SIZE are set to
   *		    CVMX_BOOTMEM_ALIGNMENT_SIZE.)
   * @param name	    name to assign to named block
   * @param flags	    Flags to control options for the allocation.
   *
   * @return physical address of block allocated, or -1 on failure
   */
  int64_t cvmx_bootmem_phy_named_block_alloc(uint64_t size, uint64_t min_addr,
  					   uint64_t max_addr,
  					   uint64_t alignment,
  					   char *name, uint32_t flags);
  
  /**
   * Finds a named memory block by name.
   * Also used for finding an unused entry in the named block table.
   *
   * @name: Name of memory block to find.	 If NULL pointer given, then
   *	  finds unused descriptor, if available.
   *
   * @flags: Flags to control options for the allocation.
   *
   * Returns Pointer to memory block descriptor, NULL if not found.
   *	   If NULL returned when name parameter is NULL, then no memory
   *	   block descriptors are available.
   */
  struct cvmx_bootmem_named_block_desc *
  cvmx_bootmem_phy_named_block_find(char *name, uint32_t flags);
  
  /**
   * Frees a named block.
   *
   * @name:   name of block to free
   * @flags:  flags for passing options
   *
   * Returns 0 on failure
   *	   1 on success
   */
  int cvmx_bootmem_phy_named_block_free(char *name, uint32_t flags);
  
  /**
   * Frees a block to the bootmem allocator list.	 This must
   * be used with care, as the size provided must match the size
   * of the block that was allocated, or the list will become
   * corrupted.
   *
   * IMPORTANT:  This is only intended to be used as part of named block
   * frees and initial population of the free memory list.
   *							*
   *
   * @phy_addr: physical address of block
   * @size:     size of block in bytes.
   * @flags:    flags for passing options
   *
   * Returns 1 on success,
   *	   0 on failure
   */
  int __cvmx_bootmem_phy_free(uint64_t phy_addr, uint64_t size, uint32_t flags);
  
  /**
   * Locks the bootmem allocator.	 This is useful in certain situations
   * where multiple allocations must be made without being interrupted.
   * This should be used with the CVMX_BOOTMEM_FLAG_NO_LOCKING flag.
   *
   */
  void cvmx_bootmem_lock(void);
  
  /**
   * Unlocks the bootmem allocator.  This is useful in certain situations
   * where multiple allocations must be made without being interrupted.
   * This should be used with the CVMX_BOOTMEM_FLAG_NO_LOCKING flag.
   *
   */
  void cvmx_bootmem_unlock(void);
  
  extern struct cvmx_bootmem_desc *cvmx_bootmem_get_desc(void);
  
  #endif /*   __CVMX_BOOTMEM_H__ */