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/***********************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 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); /** * 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 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); /** * Allocate if needed 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 the requested name block is already allocated, return * the pointer to block of memory. If request cannot be satisfied * within the address range specified, NULL is returned * * @param size Size in bytes of block to allocate * @param min_addr minimum address of range * @param max_addr maximum address of range * @param align Alignment of memory to be allocated. (must be a power of 2) * @param name name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes * @param init Initialization function * * The initialization function is optional, if omitted the named block * is initialized to all zeros when it is created, i.e. once. * * @return pointer to block of memory, NULL on error */ void *cvmx_bootmem_alloc_named_range_once(uint64_t size, uint64_t min_addr, uint64_t max_addr, uint64_t align, char *name, void (*init) (void *)); 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); /** * 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__ */
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