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69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef TEST_HELPER_H
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#define TEST_HELPER_H
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/*
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* Provides some common definitions and helper functions for the memory
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* tests.
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*
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* Copyright (C) 2020 Martin Whitaker.
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "test.h"
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/*
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* A wrapper for guiding branch prediction.
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*/
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#define unlikely(x) __builtin_expect(!!(x), 0)
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/*
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* The block size processed between each update of the progress bars and
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* spinners. This also affects how quickly the program will respond to the
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* keyboard.
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*/
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#define SPIN_SIZE (1 << 27) // in testwords
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/*
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* A macro to perform test bailout when requested.
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*/
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#define BAILOUT if (bail) return ticks
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/*
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* Returns value rounded down to the nearest multiple of align_size.
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*/
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static inline uintptr_t round_down(uintptr_t value, size_t align_size)
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{
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return value & ~(align_size - 1);
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}
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/*
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* Returns value rounded up to the nearest multiple of align_size.
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*/
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static inline uintptr_t round_up(uintptr_t value, size_t align_size)
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{
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return (value + (align_size - 1)) & ~(align_size - 1);
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}
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/*
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* Seeds the psuedo-random number generator for my_vcpu.
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*/
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void random_seed(int my_vcpu, uint64_t seed);
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/*
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* Returns a psuedo-random number for my_vcpu. The sequence of numbers returned
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* is repeatable for a given starting seed. The sequence repeats after 2^64 - 1
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* numbers. Within that period, no number is repeated.
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*/
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testword_t random(int my_vcpu);
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/*
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* Calculates the start and end word address for the chunk of segment that is
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* to be tested by my_vcpu. The chunk start will be aligned to a multiple of
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* chunk_align.
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*/
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void calculate_chunk(testword_t **start, testword_t **end, int my_vcpu, int segment, size_t chunk_align);
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#endif // TEST_HELPER_H
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