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| -rw-r--r-- | arch/mips/include/asm/octeon/cvmx-bootmem.h | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/arch/mips/include/asm/octeon/cvmx-bootmem.h b/arch/mips/include/asm/octeon/cvmx-bootmem.h new file mode 100644 index 000000000..689a82cac --- /dev/null +++ b/arch/mips/include/asm/octeon/cvmx-bootmem.h @@ -0,0 +1,341 @@ +/***********************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__ */ |