mirror of
https://github.com/memtest86plus/memtest86plus.git
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235 lines
8.7 KiB
C
235 lines
8.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2020-2021 Martin Whitaker.
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//
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// Derived from an extract of memtest86+ test.c:
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//
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// MemTest86+ V5 Specific code (GPL V2.0)
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// By Samuel DEMEULEMEESTER, sdemeule@memtest.org
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// http://www.canardpc.com - http://www.memtest.org
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// Thanks to Passmark for calculate_chunk() and various comments !
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// ----------------------------------------------------
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// test.c - MemTest-86 Version 3.4
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//
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// Released under version 2 of the Gnu Public License.
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// By Chris Brady
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#include <stdbool.h>
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#include <stdint.h>
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#include "display.h"
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#include "error.h"
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#include "test.h"
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#include "test_funcs.h"
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#include "test_helper.h"
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//------------------------------------------------------------------------------
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// Public Functions
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//------------------------------------------------------------------------------
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int test_block_move(int my_vcpu, int iterations)
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{
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int ticks = 0;
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if (my_vcpu == master_vcpu) {
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display_test_pattern_name("block move");
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}
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// Initialize memory with the initial pattern.
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for (int i = 0; i < vm_map_size; i++) {
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testword_t *start, *end;
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calculate_chunk(&start, &end, my_vcpu, i, 16 * sizeof(testword_t));
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testword_t *p = start;
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testword_t *pe = start;
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bool at_end = false;
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do {
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// take care to avoid pointer overflow
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if ((end - pe) >= SPIN_SIZE) {
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pe += SPIN_SIZE - 1;
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} else {
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at_end = true;
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pe = end;
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}
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ticks++;
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if (my_vcpu < 0) {
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continue;
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}
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test_addr[my_vcpu] = (uintptr_t)p;
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testword_t pattern1 = 1;
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do {
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testword_t pattern2 = ~pattern1;
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write_word(p + 0, pattern1);
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write_word(p + 1, pattern1);
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write_word(p + 2, pattern1);
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write_word(p + 3, pattern1);
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write_word(p + 4, pattern2);
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write_word(p + 5, pattern2);
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write_word(p + 6, pattern1);
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write_word(p + 7, pattern1);
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write_word(p + 8, pattern1);
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write_word(p + 9, pattern1);
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write_word(p + 10, pattern2);
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write_word(p + 11, pattern2);
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write_word(p + 12, pattern1);
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write_word(p + 13, pattern1);
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write_word(p + 14, pattern2);
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write_word(p + 15, pattern2);
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pattern1 = pattern1 << 1 | pattern1 >> (TESTWORD_WIDTH - 1); // rotate left
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} while (p <= (pe - 16) && (p += 16)); // test before increment in case pointer overflows
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do_tick(my_vcpu);
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BAILOUT;
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} while (!at_end && ++pe); // advance pe to next start point
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}
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barrier_wait(run_barrier);
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// Now move the data around. First move the data up half of the segment size
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// we are testing. Then move the data to the original location + 32 bytes.
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for (int i = 0; i < vm_map_size; i++) {
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testword_t *start, *end;
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calculate_chunk(&start, &end, my_vcpu, i, 16 * sizeof(testword_t));
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testword_t *p = start;
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testword_t *pe = start;
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bool at_end = false;
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do {
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// take care to avoid pointer overflow
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if ((end - pe) >= SPIN_SIZE) {
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pe += SPIN_SIZE - 1;
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} else {
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at_end = true;
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pe = end;
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}
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size_t half_length = (pe - p + 1) / 2;
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testword_t *pm = p + half_length;
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for (int j = 0; j < iterations; j++) {
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ticks++;
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if (my_vcpu < 0) {
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continue;
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}
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test_addr[my_vcpu] = (uintptr_t)p;
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#ifdef __x86_64__
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__asm__ __volatile__ (
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"cld\n"
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"jmp L110\n\t"
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".p2align 4,,7\n\t"
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"L110:\n\t"
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// At the end of all this
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// - the second half equals the initial value of the first half
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// - the first half is right shifted 64-bytes (with wrapping)
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// Move first half to second half
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"movq %1,%%rdi\n\t" // Destination, pm (mid point)
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"movq %0,%%rsi\n\t" // Source, p (start point)
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"movq %2,%%rcx\n\t" // Length, half_length (size of a half in DWORDS)
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"rep\n\t"
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"movsq\n\t"
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// Move the second half, less the last 64 bytes, to the first half, offset plus 64 bytes
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"movq %0,%%rdi\n\t"
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"addq $64,%%rdi\n\t" // Destination, p (start-point) plus 32 bytes
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"movq %1,%%rsi\n\t" // Source, pm (mid-point)
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"movq %2,%%rcx\n\t"
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"subq $8,%%rcx\n\t" // Length, half_length (size of a half in QWORDS) minus 8 QWORDS (64 bytes)
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"rep\n\t"
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"movsq\n\t"
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// Move last 8 QWORDS (64 bytes) of the second half to the start of the first half
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"movq %0,%%rdi\n\t" // Destination, p(start-point)
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// Source, 8 QWORDS from the end of the second half, left over by the last rep/movsl
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"movq $8,%%rcx\n\t" // Length, 8 QWORDS (64 bytes)
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"rep\n\t"
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"movsq\n\t"
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:: "g" (p), "g" (pm), "g" (half_length)
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: "rdi", "rsi", "rcx"
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);
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#else
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__asm__ __volatile__ (
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"cld\n"
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"jmp L110\n\t"
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".p2align 4,,7\n\t"
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"L110:\n\t"
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// At the end of all this
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// - the second half equals the initial value of the first half
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// - the first half is right shifted 32 bytes (with wrapping)
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// Move first half to second half
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"movl %1,%%edi\n\t" // Destination, pm (mid point)
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"movl %0,%%esi\n\t" // Source, p (start point)
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"movl %2,%%ecx\n\t" // Length, half_length (size of a half in DWORDS)
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"rep\n\t"
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"movsl\n\t"
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// Move the second half, less the last 32 bytes, to the first half, offset plus 32 bytes
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"movl %0,%%edi\n\t"
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"addl $32,%%edi\n\t" // Destination, p (start-point) plus 32 bytes
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"movl %1,%%esi\n\t" // Source, pm (mid-point)
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"movl %2,%%ecx\n\t"
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"subl $8,%%ecx\n\t" // Length, half_length (size of a half in DWORDS) minus 8 DWORDS (32 bytes)
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"rep\n\t"
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"movsl\n\t"
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// Move last 8 DWORDS (32 bytes) of the second half to the start of the first half
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"movl %0,%%edi\n\t" // Destination, p(start-point)
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// Source, 8 DWORDS from the end of the second half, left over by the last rep/movsl
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"movl $8,%%ecx\n\t" // Length, 8 DWORDS (32 bytes)
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"rep\n\t"
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"movsl\n\t"
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:: "g" (p), "g" (pm), "g" (half_length)
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: "edi", "esi", "ecx"
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);
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#endif
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do_tick(my_vcpu);
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BAILOUT;
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}
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} while (!at_end && ++pe); // advance pe to next start point
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}
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barrier_wait(run_barrier);
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// Now check the data. The error checking is rather crude. We just check that the
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// adjacent words are the same.
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for (int i = 0; i < vm_map_size; i++) {
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testword_t *start, *end;
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calculate_chunk(&start, &end, my_vcpu, i, 16 * sizeof(testword_t));
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testword_t *p = start;
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testword_t *pe = start;
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bool at_end = false;
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do {
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// take care to avoid pointer overflow
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if ((end - pe) >= SPIN_SIZE) {
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pe += SPIN_SIZE - 1;
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} else {
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at_end = true;
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pe = end;
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}
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ticks++;
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if (my_vcpu < 0) {
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continue;
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}
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test_addr[my_vcpu] = (uintptr_t)p;
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do {
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testword_t p0 = read_word(p + 0);
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testword_t p1 = read_word(p + 1);
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if (unlikely(p0 != p1)) {
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data_error(p, p0, p1, false);
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}
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} while (p <= (pe - 2) && (p += 2)); // test before increment in case pointer overflows
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do_tick(my_vcpu);
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BAILOUT;
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} while (!at_end && ++pe); // advance pe to next start point
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}
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return ticks;
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}
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