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https://github.com/memtest86plus/memtest86plus.git
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f392232f10
Added a new CC flag into build32 and build64 Makefiles to distinguish whether compiling to 32-bit or 64-bit code. [Lionel Debroux: rebased on the memrw functions refactor.] Signed-off-by: Chao Li <lichao@loongson.cn>
102 lines
2.5 KiB
C
102 lines
2.5 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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* \file
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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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*//*
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* Copyright (C) 2020-2022 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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* Test word atomic read and write functions.
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*/
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#include "memrw.h"
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#if (ARCH_BITS == 64)
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#define read_word read64
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#define write_word write64
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#else
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#define read_word read32
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#define write_word write32
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#endif
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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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* A macro to skip the current range without disturbing waits on barriers and creating a deadlock.
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*/
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#define SKIP_RANGE(num_ticks) { if (my_cpu >= 0) { for (int iter = 0; iter < num_ticks; iter++) { do_tick(my_cpu); BAILOUT; } } continue; }
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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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* Returns the next word in a pseudo-random sequence where state was the
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* previous word in that sequence.
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*/
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static inline testword_t prsg(testword_t state)
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{
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// This uses the algorithms described at https://en.wikipedia.org/wiki/Xorshift
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#if (ARCH_BITS == 64)
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state ^= state << 13;
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state ^= state >> 7;
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state ^= state << 17;
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#else
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state ^= state << 13;
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state ^= state >> 17;
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state ^= state << 5;
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#endif
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return state;
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}
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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_cpu. 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_cpu, int segment, size_t chunk_align);
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/**
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* Flushes the CPU caches. If SMP is enabled, synchronises the threads before
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* and after issuing the cache flush instruction.
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*/
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void flush_caches(int my_cpu);
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#endif // TEST_HELPER_H
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