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https://github.com/ARM-software/arm-trusted-firmware.git
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f45e232ab9
The macro concisely expresses and requires architecture version to be at least as required by its arguments. This would be useful when extending Trusted Firmware functionality for future architecture revisions. Replace similar usage in the current code base with the new macro. Change-Id: I9dcd0aa71a663eabd02ed9632b8ce87611fa5a57 Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/*
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* Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __UTILS_DEF_H__
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#define __UTILS_DEF_H__
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/* Compute the number of elements in the given array */
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#define ARRAY_SIZE(a) \
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(sizeof(a) / sizeof((a)[0]))
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#define IS_POWER_OF_TWO(x) \
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(((x) & ((x) - 1)) == 0)
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#define SIZE_FROM_LOG2_WORDS(n) (4 << (n))
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#define BIT(nr) (1UL << (nr))
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#define MIN(x, y) __extension__ ({ \
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__typeof__(x) _x = (x); \
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__typeof__(y) _y = (y); \
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(void)(&_x == &_y); \
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_x < _y ? _x : _y; \
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})
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#define MAX(x, y) __extension__ ({ \
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__typeof__(x) _x = (x); \
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__typeof__(y) _y = (y); \
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(void)(&_x == &_y); \
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_x > _y ? _x : _y; \
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})
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/*
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* The round_up() macro rounds up a value to the given boundary in a
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* type-agnostic yet type-safe manner. The boundary must be a power of two.
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* In other words, it computes the smallest multiple of boundary which is
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* greater than or equal to value.
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*
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* round_down() is similar but rounds the value down instead.
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*/
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#define round_boundary(value, boundary) \
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((__typeof__(value))((boundary) - 1))
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#define round_up(value, boundary) \
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((((value) - 1) | round_boundary(value, boundary)) + 1)
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#define round_down(value, boundary) \
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((value) & ~round_boundary(value, boundary))
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/*
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* Evaluates to 1 if (ptr + inc) overflows, 0 otherwise.
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* Both arguments must be unsigned pointer values (i.e. uintptr_t).
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*/
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#define check_uptr_overflow(ptr, inc) \
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(((ptr) > UINTPTR_MAX - (inc)) ? 1 : 0)
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/*
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* For those constants to be shared between C and other sources, apply a 'u'
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* or 'ull' suffix to the argument only in C, to avoid undefined or unintended
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* behaviour.
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*
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* The GNU assembler and linker do not support the 'u' and 'ull' suffix (it
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* causes the build process to fail) therefore the suffix is omitted when used
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* in linker scripts and assembler files.
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*/
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#if defined(__LINKER__) || defined(__ASSEMBLY__)
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# define U(_x) (_x)
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# define ULL(_x) (_x)
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#else
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# define U(_x) (_x##u)
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# define ULL(_x) (_x##ull)
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#endif
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/*
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* Test for the current architecture version to be at least the version
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* expected.
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*/
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#define ARM_ARCH_AT_LEAST(_maj, _min) \
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((ARM_ARCH_MAJOR > _maj) || \
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((ARM_ARCH_MAJOR == _maj) && (ARM_ARCH_MINOR >= _min)))
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#endif /* __UTILS_DEF_H__ */
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