342 lines
12 KiB
C
342 lines
12 KiB
C
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/***********************license start***************
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* Author: Cavium Networks
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*
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* Contact: support@caviumnetworks.com
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* This file is part of the OCTEON SDK
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*
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* Copyright (c) 2003-2008 Cavium Networks
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, Version 2, as
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* published by the Free Software Foundation.
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*
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* This file is distributed in the hope that it will be useful, but
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* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
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* NONINFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* or visit http://www.gnu.org/licenses/.
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*
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* This file may also be available under a different license from Cavium.
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* Contact Cavium Networks for more information
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***********************license end**************************************/
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/*
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* Simple allocate only memory allocator. Used to allocate memory at
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* application start time.
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*/
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#ifndef __CVMX_BOOTMEM_H__
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#define __CVMX_BOOTMEM_H__
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/* Must be multiple of 8, changing breaks ABI */
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#define CVMX_BOOTMEM_NAME_LEN 128
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/* Can change without breaking ABI */
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#define CVMX_BOOTMEM_NUM_NAMED_BLOCKS 64
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/* minimum alignment of bootmem alloced blocks */
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#define CVMX_BOOTMEM_ALIGNMENT_SIZE (16ull)
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/* Flags for cvmx_bootmem_phy_mem* functions */
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/* Allocate from end of block instead of beginning */
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#define CVMX_BOOTMEM_FLAG_END_ALLOC (1 << 0)
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/* Don't do any locking. */
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#define CVMX_BOOTMEM_FLAG_NO_LOCKING (1 << 1)
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/* First bytes of each free physical block of memory contain this structure,
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* which is used to maintain the free memory list. Since the bootloader is
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* only 32 bits, there is a union providing 64 and 32 bit versions. The
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* application init code converts addresses to 64 bit addresses before the
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* application starts.
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*/
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struct cvmx_bootmem_block_header {
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/*
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* Note: these are referenced from assembly routines in the
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* bootloader, so this structure should not be changed
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* without changing those routines as well.
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*/
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uint64_t next_block_addr;
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uint64_t size;
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};
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/*
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* Structure for named memory blocks. Number of descriptors available
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* can be changed without affecting compatibility, but name length
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* changes require a bump in the bootmem descriptor version Note: This
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* structure must be naturally 64 bit aligned, as a single memory
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* image will be used by both 32 and 64 bit programs.
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*/
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struct cvmx_bootmem_named_block_desc {
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/* Base address of named block */
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uint64_t base_addr;
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/*
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* Size actually allocated for named block (may differ from
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* requested).
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*/
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uint64_t size;
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/* name of named block */
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char name[CVMX_BOOTMEM_NAME_LEN];
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};
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/* Current descriptor versions */
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/* CVMX bootmem descriptor major version */
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#define CVMX_BOOTMEM_DESC_MAJ_VER 3
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/* CVMX bootmem descriptor minor version */
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#define CVMX_BOOTMEM_DESC_MIN_VER 0
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/* First three members of cvmx_bootmem_desc_t are left in original
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* positions for backwards compatibility.
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*/
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struct cvmx_bootmem_desc {
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#if defined(__BIG_ENDIAN_BITFIELD) || defined(CVMX_BUILD_FOR_LINUX_HOST)
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/* spinlock to control access to list */
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uint32_t lock;
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/* flags for indicating various conditions */
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uint32_t flags;
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uint64_t head_addr;
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/* Incremented when incompatible changes made */
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uint32_t major_version;
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/*
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* Incremented changed when compatible changes made, reset to
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* zero when major incremented.
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*/
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uint32_t minor_version;
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uint64_t app_data_addr;
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uint64_t app_data_size;
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/* number of elements in named blocks array */
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uint32_t named_block_num_blocks;
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/* length of name array in bootmem blocks */
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uint32_t named_block_name_len;
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/* address of named memory block descriptors */
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uint64_t named_block_array_addr;
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#else /* __LITTLE_ENDIAN */
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uint32_t flags;
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uint32_t lock;
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uint64_t head_addr;
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uint32_t minor_version;
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uint32_t major_version;
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uint64_t app_data_addr;
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uint64_t app_data_size;
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uint32_t named_block_name_len;
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uint32_t named_block_num_blocks;
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uint64_t named_block_array_addr;
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#endif
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};
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/**
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* Initialize the boot alloc memory structures. This is
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* normally called inside of cvmx_user_app_init()
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*
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* @mem_desc_ptr: Address of the free memory list
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*/
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extern int cvmx_bootmem_init(void *mem_desc_ptr);
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/**
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* Allocate a block of memory from the free list that was
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* passed to the application by the bootloader at a specific
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* address. This is an allocate-only algorithm, so
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* freeing memory is not possible. Allocation will fail if
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* memory cannot be allocated at the specified address.
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*
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* @size: Size in bytes of block to allocate
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* @address: Physical address to allocate memory at. If this memory is not
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* available, the allocation fails.
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* @alignment: Alignment required - must be power of 2
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* Returns pointer to block of memory, NULL on error
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*/
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extern void *cvmx_bootmem_alloc_address(uint64_t size, uint64_t address,
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uint64_t alignment);
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/**
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* Frees a previously allocated named bootmem block.
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*
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* @name: name of block to free
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*
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* Returns 0 on failure,
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* !0 on success
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*/
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/**
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* Allocate a block of memory from the free list that was passed
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* to the application by the bootloader, and assign it a name in the
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* global named block table. (part of the cvmx_bootmem_descriptor_t structure)
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* Named blocks can later be freed.
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*
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* @size: Size in bytes of block to allocate
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* @alignment: Alignment required - must be power of 2
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* @name: name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes
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*
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* Returns a pointer to block of memory, NULL on error
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*/
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extern void *cvmx_bootmem_alloc_named(uint64_t size, uint64_t alignment,
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char *name);
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/**
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* Allocate a block of memory from a specific range of the free list
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* that was passed to the application by the bootloader, and assign it
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* a name in the global named block table. (part of the
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* cvmx_bootmem_descriptor_t structure) Named blocks can later be
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* freed. If request cannot be satisfied within the address range
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* specified, NULL is returned
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*
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* @size: Size in bytes of block to allocate
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* @min_addr: minimum address of range
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* @max_addr: maximum address of range
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* @align: Alignment of memory to be allocated. (must be a power of 2)
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* @name: name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes
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*
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* Returns a pointer to block of memory, NULL on error
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*/
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extern void *cvmx_bootmem_alloc_named_range(uint64_t size, uint64_t min_addr,
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uint64_t max_addr, uint64_t align,
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char *name);
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/**
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* Allocate if needed a block of memory from a specific range of the
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* free list that was passed to the application by the bootloader, and
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* assign it a name in the global named block table. (part of the
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* cvmx_bootmem_descriptor_t structure) Named blocks can later be
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* freed. If the requested name block is already allocated, return
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* the pointer to block of memory. If request cannot be satisfied
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* within the address range specified, NULL is returned
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*
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* @param size Size in bytes of block to allocate
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* @param min_addr minimum address of range
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* @param max_addr maximum address of range
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* @param align Alignment of memory to be allocated. (must be a power of 2)
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* @param name name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes
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* @param init Initialization function
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*
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* The initialization function is optional, if omitted the named block
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* is initialized to all zeros when it is created, i.e. once.
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*
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* @return pointer to block of memory, NULL on error
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*/
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void *cvmx_bootmem_alloc_named_range_once(uint64_t size,
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uint64_t min_addr,
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uint64_t max_addr,
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uint64_t align,
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char *name,
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void (*init) (void *));
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extern int cvmx_bootmem_free_named(char *name);
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/**
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* Finds a named bootmem block by name.
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*
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* @name: name of block to free
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*
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* Returns pointer to named block descriptor on success
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* 0 on failure
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*/
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struct cvmx_bootmem_named_block_desc *cvmx_bootmem_find_named_block(char *name);
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/**
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* Allocates a block of physical memory from the free list, at
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* (optional) requested address and alignment.
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*
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* @req_size: size of region to allocate. All requests are rounded up
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* to be a multiple CVMX_BOOTMEM_ALIGNMENT_SIZE bytes size
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*
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* @address_min: Minimum address that block can occupy.
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*
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* @address_max: Specifies the maximum address_min (inclusive) that
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* the allocation can use.
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*
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* @alignment: Requested alignment of the block. If this alignment
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* cannot be met, the allocation fails. This must be a
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* power of 2. (Note: Alignment of
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* CVMX_BOOTMEM_ALIGNMENT_SIZE bytes is required, and
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* internally enforced. Requested alignments of less than
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* CVMX_BOOTMEM_ALIGNMENT_SIZE are set to
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* CVMX_BOOTMEM_ALIGNMENT_SIZE.)
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*
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* @flags: Flags to control options for the allocation.
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*
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* Returns physical address of block allocated, or -1 on failure
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*/
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int64_t cvmx_bootmem_phy_alloc(uint64_t req_size, uint64_t address_min,
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uint64_t address_max, uint64_t alignment,
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uint32_t flags);
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/**
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* Allocates a named block of physical memory from the free list, at
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* (optional) requested address and alignment.
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*
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* @param size size of region to allocate. All requests are rounded
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* up to be a multiple CVMX_BOOTMEM_ALIGNMENT_SIZE
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* bytes size
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* @param min_addr Minimum address that block can occupy.
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* @param max_addr Specifies the maximum address_min (inclusive) that
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* the allocation can use.
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* @param alignment Requested alignment of the block. If this
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* alignment cannot be met, the allocation fails.
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* This must be a power of 2. (Note: Alignment of
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* CVMX_BOOTMEM_ALIGNMENT_SIZE bytes is required, and
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* internally enforced. Requested alignments of less
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* than CVMX_BOOTMEM_ALIGNMENT_SIZE are set to
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* CVMX_BOOTMEM_ALIGNMENT_SIZE.)
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* @param name name to assign to named block
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* @param flags Flags to control options for the allocation.
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*
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* @return physical address of block allocated, or -1 on failure
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*/
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int64_t cvmx_bootmem_phy_named_block_alloc(uint64_t size, uint64_t min_addr,
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uint64_t max_addr,
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uint64_t alignment,
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char *name, uint32_t flags);
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/**
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* Frees a block to the bootmem allocator list. This must
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* be used with care, as the size provided must match the size
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* of the block that was allocated, or the list will become
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* corrupted.
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*
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* IMPORTANT: This is only intended to be used as part of named block
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* frees and initial population of the free memory list.
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* *
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*
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* @phy_addr: physical address of block
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* @size: size of block in bytes.
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* @flags: flags for passing options
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*
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* Returns 1 on success,
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* 0 on failure
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*/
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int __cvmx_bootmem_phy_free(uint64_t phy_addr, uint64_t size, uint32_t flags);
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/**
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* Locks the bootmem allocator. This is useful in certain situations
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* where multiple allocations must be made without being interrupted.
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* This should be used with the CVMX_BOOTMEM_FLAG_NO_LOCKING flag.
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*
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*/
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void cvmx_bootmem_lock(void);
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/**
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* Unlocks the bootmem allocator. This is useful in certain situations
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* where multiple allocations must be made without being interrupted.
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* This should be used with the CVMX_BOOTMEM_FLAG_NO_LOCKING flag.
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*
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*/
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void cvmx_bootmem_unlock(void);
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extern struct cvmx_bootmem_desc *cvmx_bootmem_get_desc(void);
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#endif /* __CVMX_BOOTMEM_H__ */
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