arch/mips/include/asm/octeon/cvmx-bootmem.h

   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
  70  * can be changed without affecting compatiblity, but name length
  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  */
 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
 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
 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
 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__ */