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1 | /***********************license start*************** |
2 | * Author: Cavium Networks | |
3 | * | |
4 | * Contact: support@caviumnetworks.com | |
5 | * This file is part of the OCTEON SDK | |
6 | * | |
7 | * Copyright (c) 2003-2008 Cavium Networks | |
8 | * | |
9 | * This file is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License, Version 2, as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This file is distributed in the hope that it will be useful, but | |
14 | * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or | |
16 | * NONINFRINGEMENT. See the GNU General Public License for more | |
17 | * details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this file; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | * or visit http://www.gnu.org/licenses/. | |
23 | * | |
24 | * This file may also be available under a different license from Cavium. | |
25 | * Contact Cavium Networks for more information | |
26 | ***********************license end**************************************/ | |
27 | ||
28 | /* | |
29 | * Simple allocate only memory allocator. Used to allocate memory at | |
30 | * application start time. | |
31 | */ | |
32 | ||
33 | #ifndef __CVMX_BOOTMEM_H__ | |
34 | #define __CVMX_BOOTMEM_H__ | |
35 | /* Must be multiple of 8, changing breaks ABI */ | |
36 | #define CVMX_BOOTMEM_NAME_LEN 128 | |
37 | ||
38 | /* Can change without breaking ABI */ | |
39 | #define CVMX_BOOTMEM_NUM_NAMED_BLOCKS 64 | |
40 | ||
41 | /* minimum alignment of bootmem alloced blocks */ | |
42 | #define CVMX_BOOTMEM_ALIGNMENT_SIZE (16ull) | |
43 | ||
44 | /* Flags for cvmx_bootmem_phy_mem* functions */ | |
45 | /* Allocate from end of block instead of beginning */ | |
46 | #define CVMX_BOOTMEM_FLAG_END_ALLOC (1 << 0) | |
47 | ||
48 | /* Don't do any locking. */ | |
49 | #define CVMX_BOOTMEM_FLAG_NO_LOCKING (1 << 1) | |
50 | ||
51 | /* First bytes of each free physical block of memory contain this structure, | |
52 | * which is used to maintain the free memory list. Since the bootloader is | |
53 | * only 32 bits, there is a union providing 64 and 32 bit versions. The | |
54 | * application init code converts addresses to 64 bit addresses before the | |
55 | * application starts. | |
56 | */ | |
57 | struct cvmx_bootmem_block_header { | |
58 | /* | |
59 | * Note: these are referenced from assembly routines in the | |
60 | * bootloader, so this structure should not be changed | |
61 | * without changing those routines as well. | |
62 | */ | |
63 | uint64_t next_block_addr; | |
64 | uint64_t size; | |
65 | ||
66 | }; | |
67 | ||
68 | /* | |
69 | * Structure for named memory blocks. Number of descriptors available | |
25985edc | 70 | * can be changed without affecting compatibility, but name length |
58f07778 DD |
71 | * changes require a bump in the bootmem descriptor version Note: This |
72 | * structure must be naturally 64 bit aligned, as a single memory | |
73 | * image will be used by both 32 and 64 bit programs. | |
74 | */ | |
75 | struct cvmx_bootmem_named_block_desc { | |
76 | /* Base address of named block */ | |
77 | uint64_t base_addr; | |
78 | /* | |
79 | * Size actually allocated for named block (may differ from | |
80 | * requested). | |
81 | */ | |
82 | uint64_t size; | |
83 | /* name of named block */ | |
84 | char name[CVMX_BOOTMEM_NAME_LEN]; | |
85 | }; | |
86 | ||
87 | /* Current descriptor versions */ | |
88 | /* CVMX bootmem descriptor major version */ | |
89 | #define CVMX_BOOTMEM_DESC_MAJ_VER 3 | |
90 | ||
91 | /* CVMX bootmem descriptor minor version */ | |
92 | #define CVMX_BOOTMEM_DESC_MIN_VER 0 | |
93 | ||
94 | /* First three members of cvmx_bootmem_desc_t are left in original | |
95 | * positions for backwards compatibility. | |
96 | */ | |
97 | struct cvmx_bootmem_desc { | |
98 | /* spinlock to control access to list */ | |
99 | uint32_t lock; | |
100 | /* flags for indicating various conditions */ | |
101 | uint32_t flags; | |
102 | uint64_t head_addr; | |
103 | ||
104 | /* Incremented when incompatible changes made */ | |
105 | uint32_t major_version; | |
106 | ||
107 | /* | |
108 | * Incremented changed when compatible changes made, reset to | |
109 | * zero when major incremented. | |
110 | */ | |
111 | uint32_t minor_version; | |
112 | ||
113 | uint64_t app_data_addr; | |
114 | uint64_t app_data_size; | |
115 | ||
116 | /* number of elements in named blocks array */ | |
117 | uint32_t named_block_num_blocks; | |
118 | ||
119 | /* length of name array in bootmem blocks */ | |
120 | uint32_t named_block_name_len; | |
121 | /* address of named memory block descriptors */ | |
122 | uint64_t named_block_array_addr; | |
123 | ||
124 | }; | |
125 | ||
126 | /** | |
127 | * Initialize the boot alloc memory structures. This is | |
128 | * normally called inside of cvmx_user_app_init() | |
129 | * | |
130 | * @mem_desc_ptr: Address of the free memory list | |
131 | */ | |
132 | extern int cvmx_bootmem_init(void *mem_desc_ptr); | |
133 | ||
134 | /** | |
135 | * Allocate a block of memory from the free list that was passed | |
136 | * to the application by the bootloader. | |
137 | * This is an allocate-only algorithm, so freeing memory is not possible. | |
138 | * | |
139 | * @size: Size in bytes of block to allocate | |
140 | * @alignment: Alignment required - must be power of 2 | |
141 | * | |
142 | * Returns pointer to block of memory, NULL on error | |
143 | */ | |
144 | extern void *cvmx_bootmem_alloc(uint64_t size, uint64_t alignment); | |
145 | ||
146 | /** | |
147 | * Allocate a block of memory from the free list that was | |
148 | * passed to the application by the bootloader at a specific | |
149 | * address. This is an allocate-only algorithm, so | |
150 | * freeing memory is not possible. Allocation will fail if | |
151 | * memory cannot be allocated at the specified address. | |
152 | * | |
153 | * @size: Size in bytes of block to allocate | |
154 | * @address: Physical address to allocate memory at. If this memory is not | |
155 | * available, the allocation fails. | |
156 | * @alignment: Alignment required - must be power of 2 | |
157 | * Returns pointer to block of memory, NULL on error | |
158 | */ | |
159 | extern void *cvmx_bootmem_alloc_address(uint64_t size, uint64_t address, | |
160 | uint64_t alignment); | |
161 | ||
162 | /** | |
163 | * Allocate a block of memory from the free list that was | |
164 | * passed to the application by the bootloader within a specified | |
165 | * address range. This is an allocate-only algorithm, so | |
166 | * freeing memory is not possible. Allocation will fail if | |
167 | * memory cannot be allocated in the requested range. | |
168 | * | |
169 | * @size: Size in bytes of block to allocate | |
170 | * @min_addr: defines the minimum address of the range | |
171 | * @max_addr: defines the maximum address of the range | |
172 | * @alignment: Alignment required - must be power of 2 | |
173 | * Returns pointer to block of memory, NULL on error | |
174 | */ | |
175 | extern void *cvmx_bootmem_alloc_range(uint64_t size, uint64_t alignment, | |
176 | uint64_t min_addr, uint64_t max_addr); | |
177 | ||
178 | /** | |
179 | * Frees a previously allocated named bootmem block. | |
180 | * | |
181 | * @name: name of block to free | |
182 | * | |
183 | * Returns 0 on failure, | |
184 | * !0 on success | |
185 | */ | |
6fa044ab DD |
186 | |
187 | ||
188 | /** | |
189 | * Allocate a block of memory from the free list that was passed | |
190 | * to the application by the bootloader, and assign it a name in the | |
191 | * global named block table. (part of the cvmx_bootmem_descriptor_t structure) | |
192 | * Named blocks can later be freed. | |
193 | * | |
194 | * @size: Size in bytes of block to allocate | |
195 | * @alignment: Alignment required - must be power of 2 | |
196 | * @name: name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes | |
197 | * | |
198 | * Returns a pointer to block of memory, NULL on error | |
199 | */ | |
200 | extern void *cvmx_bootmem_alloc_named(uint64_t size, uint64_t alignment, | |
201 | char *name); | |
202 | ||
203 | ||
204 | ||
205 | /** | |
206 | * Allocate a block of memory from the free list that was passed | |
207 | * to the application by the bootloader, and assign it a name in the | |
208 | * global named block table. (part of the cvmx_bootmem_descriptor_t structure) | |
209 | * Named blocks can later be freed. | |
210 | * | |
211 | * @size: Size in bytes of block to allocate | |
212 | * @address: Physical address to allocate memory at. If this | |
213 | * memory is not available, the allocation fails. | |
214 | * @name: name of block - must be less than CVMX_BOOTMEM_NAME_LEN | |
215 | * bytes | |
216 | * | |
217 | * Returns a pointer to block of memory, NULL on error | |
218 | */ | |
219 | extern void *cvmx_bootmem_alloc_named_address(uint64_t size, uint64_t address, | |
220 | char *name); | |
221 | ||
222 | ||
223 | ||
224 | /** | |
225 | * Allocate a block of memory from a specific range of the free list | |
226 | * that was passed to the application by the bootloader, and assign it | |
227 | * a name in the global named block table. (part of the | |
228 | * cvmx_bootmem_descriptor_t structure) Named blocks can later be | |
229 | * freed. If request cannot be satisfied within the address range | |
230 | * specified, NULL is returned | |
231 | * | |
232 | * @size: Size in bytes of block to allocate | |
233 | * @min_addr: minimum address of range | |
234 | * @max_addr: maximum address of range | |
235 | * @align: Alignment of memory to be allocated. (must be a power of 2) | |
236 | * @name: name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes | |
237 | * | |
238 | * Returns a pointer to block of memory, NULL on error | |
239 | */ | |
240 | extern void *cvmx_bootmem_alloc_named_range(uint64_t size, uint64_t min_addr, | |
241 | uint64_t max_addr, uint64_t align, | |
242 | char *name); | |
243 | ||
58f07778 DD |
244 | extern int cvmx_bootmem_free_named(char *name); |
245 | ||
246 | /** | |
247 | * Finds a named bootmem block by name. | |
248 | * | |
249 | * @name: name of block to free | |
250 | * | |
251 | * Returns pointer to named block descriptor on success | |
252 | * 0 on failure | |
253 | */ | |
254 | struct cvmx_bootmem_named_block_desc *cvmx_bootmem_find_named_block(char *name); | |
255 | ||
256 | /** | |
257 | * Allocates a block of physical memory from the free list, at | |
258 | * (optional) requested address and alignment. | |
259 | * | |
260 | * @req_size: size of region to allocate. All requests are rounded up | |
261 | * to be a multiple CVMX_BOOTMEM_ALIGNMENT_SIZE bytes size | |
262 | * | |
263 | * @address_min: Minimum address that block can occupy. | |
264 | * | |
265 | * @address_max: Specifies the maximum address_min (inclusive) that | |
266 | * the allocation can use. | |
267 | * | |
268 | * @alignment: Requested alignment of the block. If this alignment | |
269 | * cannot be met, the allocation fails. This must be a | |
270 | * power of 2. (Note: Alignment of | |
271 | * CVMX_BOOTMEM_ALIGNMENT_SIZE bytes is required, and | |
272 | * internally enforced. Requested alignments of less than | |
273 | * CVMX_BOOTMEM_ALIGNMENT_SIZE are set to | |
274 | * CVMX_BOOTMEM_ALIGNMENT_SIZE.) | |
275 | * | |
276 | * @flags: Flags to control options for the allocation. | |
277 | * | |
278 | * Returns physical address of block allocated, or -1 on failure | |
279 | */ | |
280 | int64_t cvmx_bootmem_phy_alloc(uint64_t req_size, uint64_t address_min, | |
281 | uint64_t address_max, uint64_t alignment, | |
282 | uint32_t flags); | |
283 | ||
6fa044ab DD |
284 | /** |
285 | * Allocates a named block of physical memory from the free list, at | |
286 | * (optional) requested address and alignment. | |
287 | * | |
288 | * @param size size of region to allocate. All requests are rounded | |
289 | * up to be a multiple CVMX_BOOTMEM_ALIGNMENT_SIZE | |
290 | * bytes size | |
291 | * @param min_addr Minimum address that block can occupy. | |
292 | * @param max_addr Specifies the maximum address_min (inclusive) that | |
293 | * the allocation can use. | |
294 | * @param alignment Requested alignment of the block. If this | |
295 | * alignment cannot be met, the allocation fails. | |
296 | * This must be a power of 2. (Note: Alignment of | |
297 | * CVMX_BOOTMEM_ALIGNMENT_SIZE bytes is required, and | |
298 | * internally enforced. Requested alignments of less | |
299 | * than CVMX_BOOTMEM_ALIGNMENT_SIZE are set to | |
300 | * CVMX_BOOTMEM_ALIGNMENT_SIZE.) | |
301 | * @param name name to assign to named block | |
302 | * @param flags Flags to control options for the allocation. | |
303 | * | |
304 | * @return physical address of block allocated, or -1 on failure | |
305 | */ | |
306 | int64_t cvmx_bootmem_phy_named_block_alloc(uint64_t size, uint64_t min_addr, | |
307 | uint64_t max_addr, | |
308 | uint64_t alignment, | |
309 | char *name, uint32_t flags); | |
310 | ||
58f07778 DD |
311 | /** |
312 | * Finds a named memory block by name. | |
313 | * Also used for finding an unused entry in the named block table. | |
314 | * | |
315 | * @name: Name of memory block to find. If NULL pointer given, then | |
316 | * finds unused descriptor, if available. | |
317 | * | |
318 | * @flags: Flags to control options for the allocation. | |
319 | * | |
320 | * Returns Pointer to memory block descriptor, NULL if not found. | |
321 | * If NULL returned when name parameter is NULL, then no memory | |
322 | * block descriptors are available. | |
323 | */ | |
324 | struct cvmx_bootmem_named_block_desc * | |
325 | cvmx_bootmem_phy_named_block_find(char *name, uint32_t flags); | |
326 | ||
327 | /** | |
328 | * Frees a named block. | |
329 | * | |
330 | * @name: name of block to free | |
331 | * @flags: flags for passing options | |
332 | * | |
333 | * Returns 0 on failure | |
334 | * 1 on success | |
335 | */ | |
336 | int cvmx_bootmem_phy_named_block_free(char *name, uint32_t flags); | |
337 | ||
338 | /** | |
339 | * Frees a block to the bootmem allocator list. This must | |
340 | * be used with care, as the size provided must match the size | |
341 | * of the block that was allocated, or the list will become | |
342 | * corrupted. | |
343 | * | |
344 | * IMPORTANT: This is only intended to be used as part of named block | |
345 | * frees and initial population of the free memory list. | |
346 | * * | |
347 | * | |
348 | * @phy_addr: physical address of block | |
349 | * @size: size of block in bytes. | |
350 | * @flags: flags for passing options | |
351 | * | |
352 | * Returns 1 on success, | |
353 | * 0 on failure | |
354 | */ | |
355 | int __cvmx_bootmem_phy_free(uint64_t phy_addr, uint64_t size, uint32_t flags); | |
356 | ||
357 | /** | |
358 | * Locks the bootmem allocator. This is useful in certain situations | |
359 | * where multiple allocations must be made without being interrupted. | |
360 | * This should be used with the CVMX_BOOTMEM_FLAG_NO_LOCKING flag. | |
361 | * | |
362 | */ | |
363 | void cvmx_bootmem_lock(void); | |
364 | ||
365 | /** | |
366 | * Unlocks the bootmem allocator. This is useful in certain situations | |
367 | * where multiple allocations must be made without being interrupted. | |
368 | * This should be used with the CVMX_BOOTMEM_FLAG_NO_LOCKING flag. | |
369 | * | |
370 | */ | |
371 | void cvmx_bootmem_unlock(void); | |
372 | ||
373 | #endif /* __CVMX_BOOTMEM_H__ */ |