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219d14fe5f
Executive is a library that can be used by standalone applications and kernels to abstract access to Octeon SoC and board-specific hardware and facilities. The FreeBSD port to Octeon will be updated to use this where possible.
430 lines
16 KiB
C
430 lines
16 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* * Neither the name of Cavium Networks nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS
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* OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
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* RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
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* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
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* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES
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* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR
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* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET
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* POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT
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* OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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*
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*
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* For any questions regarding licensing please contact marketing@caviumnetworks.com
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*
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***********************license end**************************************/
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/**
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* @file
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* Simple allocate only memory allocator. Used to allocate memory at application
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* start time.
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*
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* <hr>$Revision: 41586 $<hr>
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*
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*/
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#ifndef __CVMX_BOOTMEM_H__
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#define __CVMX_BOOTMEM_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define CVMX_BOOTMEM_NAME_LEN 128 /* Must be multiple of 8, changing breaks ABI */
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#define CVMX_BOOTMEM_NUM_NAMED_BLOCKS 64 /* Can change without breaking ABI */
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#define CVMX_BOOTMEM_ALIGNMENT_SIZE (16ull) /* minimum alignment of bootmem alloced blocks */
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/* Flags for cvmx_bootmem_phy_mem* functions */
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#define CVMX_BOOTMEM_FLAG_END_ALLOC (1 << 0) /* Allocate from end of block instead of beginning */
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#define CVMX_BOOTMEM_FLAG_NO_LOCKING (1 << 1) /* Don't do any locking. */
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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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typedef struct
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{
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/* Note: these are referenced from assembly routines in the bootloader, so this structure
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** should not be changed without changing those routines as well. */
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uint64_t next_block_addr;
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uint64_t size;
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} cvmx_bootmem_block_header_t;
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/* Structure for named memory blocks
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** Number of descriptors
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** available can be changed without affecting compatiblity,
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** but name length changes require a bump in the bootmem
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** descriptor version
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** Note: This structure must be naturally 64 bit aligned, as a single
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** memory image will be used by both 32 and 64 bit programs.
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*/
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typedef struct
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{
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uint64_t base_addr; /**< Base address of named block */
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uint64_t size; /**< Size actually allocated for named block (may differ from requested) */
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char name[CVMX_BOOTMEM_NAME_LEN]; /**< name of named block */
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} cvmx_bootmem_named_block_desc_t;
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/* Current descriptor versions */
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#define CVMX_BOOTMEM_DESC_MAJ_VER 3 /* CVMX bootmem descriptor major version */
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#define CVMX_BOOTMEM_DESC_MIN_VER 0 /* CVMX bootmem descriptor minor version */
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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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typedef struct
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{
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uint32_t lock; /**< spinlock to control access to list */
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uint32_t flags; /**< flags for indicating various conditions */
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uint64_t head_addr;
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uint32_t major_version; /**< incremented changed when incompatible changes made */
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uint32_t minor_version; /**< incremented changed when compatible changes made, reset to zero when major incremented */
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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_num_blocks; /**< number of elements in named blocks array */
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uint32_t named_block_name_len; /**< length of name array in bootmem blocks */
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uint64_t named_block_array_addr; /**< address of named memory block descriptors */
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} cvmx_bootmem_desc_t;
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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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* @param mem_desc_ptr Address of the free memory list
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* @return
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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 passed
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* to the application by the bootloader.
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* This is an allocate-only algorithm, so freeing memory is not possible.
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*
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* @param size Size in bytes of block to allocate
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* @param alignment Alignment required - must be power of 2
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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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extern void *cvmx_bootmem_alloc(uint64_t size, uint64_t alignment);
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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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* @param size Size in bytes of block to allocate
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* @param address Physical address to allocate memory at. If this memory is not
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* available, the allocation fails.
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* @param alignment Alignment required - must be power of 2
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* @return 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, uint64_t alignment);
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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 within a specified
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* address range. 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 in the requested range.
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*
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* @param size Size in bytes of block to allocate
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* @param min_addr defines the minimum address of the range
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* @param max_addr defines the maximum address of the range
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* @param alignment Alignment required - must be power of 2
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* @return pointer to block of memory, NULL on error
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*/
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extern void *cvmx_bootmem_alloc_range(uint64_t size, uint64_t alignment, uint64_t min_addr, uint64_t max_addr);
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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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* @param size Size in bytes of block to allocate
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* @param alignment Alignment required - must be 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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*
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* @return 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, char *name);
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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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* @param size Size in bytes of block to allocate
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* @param address Physical address to allocate memory at. If this memory is not
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* available, the allocation fails.
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* @param name name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes
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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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extern void *cvmx_bootmem_alloc_named_address(uint64_t size, uint64_t address, char *name);
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/**
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* Allocate a block of memory from a specific range of 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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* If request cannot be satisfied 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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*
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* @return 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, uint64_t max_addr, uint64_t align, char *name);
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/**
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* Frees a previously allocated named bootmem block.
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*
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* @param name name of block to free
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*
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* @return 0 on failure,
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* !0 on success
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*/
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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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* @param name name of block to free
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*
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* @return pointer to named block descriptor on success
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* 0 on failure
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*/
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cvmx_bootmem_named_block_desc_t * cvmx_bootmem_find_named_block(char *name);
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/**
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* Returns the size of available memory in bytes, only
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* counting blocks that are at least as big as the minimum block
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* size.
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*
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* @param min_block_size
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* Minimum block size to count in total.
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*
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* @return Number of bytes available for allocation that meet the block size requirement
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*/
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uint64_t cvmx_bootmem_available_mem(uint64_t min_block_size);
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/**
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* Prints out the list of named blocks that have been allocated
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* along with their addresses and sizes.
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* This is primarily used for debugging purposes
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*/
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void cvmx_bootmem_print_named(void);
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/**
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* Allocates a block of physical memory from the free list, at (optional) requested address and alignment.
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*
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* @param req_size size of region to allocate. All requests are rounded up to be a multiple CVMX_BOOTMEM_ALIGNMENT_SIZE bytes size
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* @param address_min
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* Minimum address that block can occupy.
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* @param address_max
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* Specifies the maximum address_min (inclusive) that the allocation can use.
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* @param alignment Requested alignment of the block. If this alignment cannot be met, the allocation fails.
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* This must be a power of 2.
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* (Note: Alignment of CVMX_BOOTMEM_ALIGNMENT_SIZE bytes is required, and internally enforced. Requested alignments of
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* less than CVMX_BOOTMEM_ALIGNMENT_SIZE are set to CVMX_BOOTMEM_ALIGNMENT_SIZE.)
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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_alloc(uint64_t req_size, uint64_t address_min, uint64_t address_max, uint64_t alignment, uint32_t flags);
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/**
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* Allocates a named block of physical memory from the free list, at (optional) requested address and alignment.
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*
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* @param size size of region to allocate. All requests are rounded up to be a multiple CVMX_BOOTMEM_ALIGNMENT_SIZE bytes size
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* @param min_addr
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* Minimum address that block can occupy.
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* @param max_addr
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* Specifies the maximum address_min (inclusive) that the allocation can use.
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* @param alignment Requested alignment of the block. If this alignment cannot be met, the allocation fails.
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* This must be a power of 2.
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* (Note: Alignment of CVMX_BOOTMEM_ALIGNMENT_SIZE bytes is required, and internally enforced. Requested alignments of
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* less than CVMX_BOOTMEM_ALIGNMENT_SIZE are set to 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, uint64_t max_addr, uint64_t alignment, char *name, uint32_t flags);
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/**
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* Finds a named memory block by name.
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* Also used for finding an unused entry in the named block table.
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*
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* @param name Name of memory block to find.
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* If NULL pointer given, then finds unused descriptor, if available.
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* @param flags Flags to control options for the allocation.
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*
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* @return Pointer to memory block descriptor, NULL if not found.
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* If NULL returned when name parameter is NULL, then no memory
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* block descriptors are available.
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*/
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cvmx_bootmem_named_block_desc_t * cvmx_bootmem_phy_named_block_find(char *name, uint32_t flags);
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/**
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* Returns the size of available memory in bytes, only
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* counting blocks that are at least as big as the minimum block
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* size.
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*
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* @param min_block_size
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* Minimum block size to count in total.
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*
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* @return Number of bytes available for allocation that meet the block size requirement
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*/
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uint64_t cvmx_bootmem_phy_available_mem(uint64_t min_block_size);
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/**
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* Frees a named block.
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*
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* @param name name of block to free
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* @param flags flags for passing options
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*
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* @return 0 on failure
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* 1 on success
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*/
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int cvmx_bootmem_phy_named_block_free(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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* @param phy_addr physical address of block
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* @param size size of block in bytes.
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* @param flags flags for passing options
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*
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* @return 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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* Prints the list of currently allocated named blocks
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*
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*/
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void cvmx_bootmem_phy_named_block_print(void);
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/**
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* Prints the list of available memory.
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*
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*/
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void cvmx_bootmem_phy_list_print(void);
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/**
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* This function initializes the free memory list used by cvmx_bootmem.
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* This must be called before any allocations can be done.
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*
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* @param mem_size Total memory available, in bytes
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* @param low_reserved_bytes
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* Number of bytes to reserve (leave out of free list) at address 0x0.
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* @param desc_buffer
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* Buffer for the bootmem descriptor. This must be a 32 bit addressable
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* address.
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*
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* @return 1 on success
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* 0 on failure
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*/
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int64_t cvmx_bootmem_phy_mem_list_init(uint64_t mem_size, uint32_t low_reserved_bytes, cvmx_bootmem_desc_t *desc_buffer);
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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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/**
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* Internal use function to get the current descriptor pointer */
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void *__cvmx_bootmem_internal_get_desc_ptr(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CVMX_BOOTMEM_H__ */
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