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/* Copyright (c) 2013, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* @file
*
* ODP alignments
*/
#ifndef ODP_ALIGN_H_
#define ODP_ALIGN_H_
#ifdef __cplusplus
extern "C" {
#endif
/** @addtogroup odp_compiler_optim
* Macros that allow cache line size configuration, check that
* alignment is a power of two etc.
* @{
*/
#ifdef __GNUC__
/* Checkpatch complains, but cannot use __aligned(size) for this purpose. */
/**
* Defines type/struct/variable alignment in bytes
*/
#define ODP_ALIGNED(x) __attribute__((__aligned__(x)))
/**
* Defines type/struct to be packed
*/
#define ODP_PACKED __attribute__((__packed__))
/**
* Returns offset of member in type
*/
#define ODP_OFFSETOF(type, member) __builtin_offsetof(type, member)
/**
* Returns sizeof member
*/
#define ODP_FIELD_SIZEOF(type, member) sizeof(((type *)0)->member)
#if defined __x86_64__ || defined __i386__
/** Cache line size */
#define ODP_CACHE_LINE_SIZE 64
#elif defined __arm__ || defined __aarch64__
/** Cache line size */
#define ODP_CACHE_LINE_SIZE 64
#elif defined __OCTEON__
/** Cache line size */
#define ODP_CACHE_LINE_SIZE 128
#elif defined __powerpc__
/** Cache line size */
#define ODP_CACHE_LINE_SIZE 64
#else
#error GCC target not found
#endif
#else
#error Non-gcc compatible compiler
#endif
/** Page size */
#define ODP_PAGE_SIZE 4096
/*
* Round up
*/
/**
* @internal
* Round up pointer 'x' to alignment 'align'
*/
#define ODP_ALIGN_ROUNDUP_PTR(x, align)\
((void *)ODP_ALIGN_ROUNDUP((uintptr_t)(x), (uintptr_t)(align)))
/**
* @internal
* Round up pointer 'x' to cache line size alignment
*/
#define ODP_CACHE_LINE_SIZE_ROUNDUP_PTR(x)\
((void *)ODP_CACHE_LINE_SIZE_ROUNDUP((uintptr_t)(x)))
/*
* Round down
*/
/**
* @internal
* Round down pointer 'x' to 'align' alignment, which is a power of two
*/
#define ODP_ALIGN_ROUNDDOWN_PTR_POWER_2(x, align)\
((void *)ODP_ALIGN_ROUNDDOWN_POWER_2((uintptr_t)(x), (uintptr_t)(align)))
/**
* @internal
* Round down pointer 'x' to cache line size alignment
*/
#define ODP_CACHE_LINE_SIZE_ROUNDDOWN_PTR(x)\
((void *)ODP_CACHE_LINE_SIZE_ROUNDDOWN((uintptr_t)(x)))
/** Defines type/struct/variable to be cache line size aligned */
#define ODP_ALIGNED_CACHE ODP_ALIGNED(ODP_CACHE_LINE_SIZE)
/** Defines type/struct/variable to be page size aligned */
#define ODP_ALIGNED_PAGE ODP_ALIGNED(ODP_PAGE_SIZE)
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif
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