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- cvmx-bootmem.h
/***********************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__ */