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110 lines
3.3 KiB
110 lines
3.3 KiB
/* |
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* Copyright (c) 2018 Intel Corporation |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#ifndef SYS_MEMPOOL_BASE_H |
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#define SYS_MEMPOOL_BASE_H |
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#include <zephyr/types.h> |
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#include <stddef.h> |
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/* |
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* Definitions and macros used by both the IRQ-safe k_mem_pool and user-mode |
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* compatible sys_mem_pool implementations |
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*/ |
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struct sys_mem_pool_lvl { |
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union { |
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u32_t *bits_p; |
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u32_t bits; |
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}; |
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sys_dlist_t free_list; |
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}; |
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#define SYS_MEM_POOL_KERNEL 0 |
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#define SYS_MEM_POOL_USER 1 |
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struct sys_mem_pool_base { |
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void *buf; |
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size_t max_sz; |
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u16_t n_max; |
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u8_t n_levels; |
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u8_t max_inline_level; |
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struct sys_mem_pool_lvl *levels; |
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u8_t flags; |
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}; |
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#define _ALIGN4(n) ((((n)+3)/4)*4) |
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#define _MPOOL_HAVE_LVL(max, min, l) (((max) >> (2*(l))) >= (min) ? 1 : 0) |
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#define __MPOOL_LVLS(maxsz, minsz) \ |
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(_MPOOL_HAVE_LVL((maxsz), (minsz), 0) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 1) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 2) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 3) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 4) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 5) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 6) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 7) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 8) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 9) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 10) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 11) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 12) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 13) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 14) + \ |
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_MPOOL_HAVE_LVL((maxsz), (minsz), 15)) |
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#define _MPOOL_MINBLK sizeof(sys_dnode_t) |
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#define _MPOOL_LVLS(max, min) \ |
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__MPOOL_LVLS((max), (min) >= _MPOOL_MINBLK ? (min) : _MPOOL_MINBLK) |
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/* Rounds the needed bits up to integer multiples of u32_t */ |
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#define _MPOOL_LBIT_WORDS_UNCLAMPED(n_max, l) \ |
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((((n_max) << (2*(l))) + 31) / 32) |
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/* One word gets stored free unioned with the pointer, otherwise the |
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* calculated unclamped value |
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*/ |
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#define _MPOOL_LBIT_WORDS(n_max, l) \ |
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(_MPOOL_LBIT_WORDS_UNCLAMPED(n_max, l) < 2 ? 0 \ |
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: _MPOOL_LBIT_WORDS_UNCLAMPED(n_max, l)) |
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/* How many bytes for the bitfields of a single level? */ |
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#define _MPOOL_LBIT_BYTES(maxsz, minsz, l, n_max) \ |
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(_MPOOL_LVLS((maxsz), (minsz)) >= (l) ? \ |
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4 * _MPOOL_LBIT_WORDS((n_max), l) : 0) |
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/* Size of the bitmap array that follows the buffer in allocated memory */ |
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#define _MPOOL_BITS_SIZE(maxsz, minsz, n_max) \ |
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(_MPOOL_LBIT_BYTES(maxsz, minsz, 0, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 1, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 2, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 3, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 4, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 5, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 6, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 7, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 8, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 9, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 10, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 11, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 12, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 13, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 14, n_max) + \ |
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_MPOOL_LBIT_BYTES(maxsz, minsz, 15, n_max)) |
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void _sys_mem_pool_base_init(struct sys_mem_pool_base *p); |
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int _sys_mem_pool_block_alloc(struct sys_mem_pool_base *p, size_t size, |
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u32_t *level_p, u32_t *block_p, void **data_p); |
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void _sys_mem_pool_block_free(struct sys_mem_pool_base *p, u32_t level, |
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u32_t block); |
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#endif /* SYS_MEMPOOL_BASE_H */
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