mirror of
https://github.com/memtest86plus/memtest86plus
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93c9c8ded5
* Improve abstraction in vmem.h and limit memory benchmarking to first 2GB. The third GB may get used for remapping memory regions that are only accessed during startup, so it's not safe to use it for the memory speed tests. * Fix calculation of end limit for locating memory benchmark workspace. * Document vmem.h. * Use window number, not current start address, to detect first window. * Increase the program low-load range from 1MB to 4MB and make more robust. If the BIOS has reserved some parts of low memory, there may not be enough contiguous space left to load the program there (issue #49). So increase the low-load range to include the first 3MB of high memory. Also guard against the program being initially loaded straddling the new boundary. Co-authored-by: Martin Whitaker <memtest@martin-whitaker.me.uk>
116 lines
2.2 KiB
C
116 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef TEST_H
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#define TEST_H
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/**
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* \file
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*
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* Provides types and variables used when performing the memory 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 <stdbool.h>
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#include <stdint.h>
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#include "pmem.h"
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#include "smp.h"
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#include "barrier.h"
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#include "spinlock.h"
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/**
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* A mapping from a CPU core number to the index number of the memory chunk
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* it operates on when performing a memory test in parallel across all the
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* enabled cores.
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*/
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extern uint8_t chunk_index[MAX_CPUS];
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/*
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* The number of CPU cores being used for the current test. This is always
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* either 1 or the full number of enabled CPU cores.
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*/
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extern int num_active_cpus;
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/**
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* The current master CPU core.
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*/
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extern int master_cpu;
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/**
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* A barrier used when running tests.
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*/
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extern barrier_t *run_barrier;
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/**
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* A mutex used when reporting errors or printing trace information.
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*/
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extern spinlock_t *error_mutex;
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/**
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* The word width (in bits) used for memory testing.
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*/
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#ifdef __x86_64__
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#define TESTWORD_WIDTH 64
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#else
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#define TESTWORD_WIDTH 32
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#endif
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/**
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* The number of hex digits needed to display a memory test word.
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*/
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#define TESTWORD_DIGITS (TESTWORD_WIDTH / 4)
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/**
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* The word type used for memory testing.
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*/
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typedef uintptr_t testword_t;
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/**
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* A virtual memory segment descriptor.
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*/
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typedef struct {
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uintptr_t pm_base_addr;
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testword_t *start;
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testword_t *end;
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} vm_map_t;
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/**
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* The list of memory segments currently mapped into virtual memory.
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*/
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extern vm_map_t vm_map[MAX_MEM_SEGMENTS];
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/**
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* The number of memory segments currently mapped into virtual memory.
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*/
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extern int vm_map_size;
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/**
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* The number of completed test passes.
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*/
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extern int pass_num;
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/**
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* The current test number.
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*/
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extern int test_num;
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/**
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* The current window number.
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*/
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extern int window_num;
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/**
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* A flag indicating that testing should be restarted due to a configuration
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* change.
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*/
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extern bool restart;
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/**
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* A flag indicating that the current test should be aborted.
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*/
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extern bool bail;
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/**
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* The base address of the block of memory currently being tested.
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*/
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extern uintptr_t test_addr[MAX_CPUS];
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#endif // TEST_H
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