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memtest86plus/app/error.c

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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2020 Martin Whitaker.
//
// Derived from memtest86+ error.c
//
// error.c - MemTest-86 Version 4.1
//
// Released under version 2 of the Gnu Public License.
// By Chris Brady
#include <stdbool.h>
#include <stdint.h>
#include <limits.h>
#include "smp.h"
#include "vmem.h"
#include "badram.h"
#include "config.h"
#include "display.h"
#include "test.h"
#include "tests.h"
#include "error.h"
//------------------------------------------------------------------------------
// Constants
//------------------------------------------------------------------------------
#ifndef USB_WORKAROUND
#define USB_WORKAROUND 1
#endif
//------------------------------------------------------------------------------
// Types
//------------------------------------------------------------------------------
typedef enum { ADDR_ERROR, DATA_ERROR, PARITY_ERROR, NEW_MODE } error_type_t;
typedef struct {
uintptr_t page;
uintptr_t offset;
} page_offs_t;
typedef struct {
page_offs_t min_addr;
page_offs_t max_addr;
testword_t bad_bits;
int min_bits;
int max_bits;
uint64_t total_bits;
uintptr_t run_length;
uintptr_t max_run;
uintptr_t last_addr;
testword_t last_xor;
} error_info_t;
//------------------------------------------------------------------------------
// Private Variables
//------------------------------------------------------------------------------
static error_mode_t last_error_mode = ERROR_MODE_NONE;
static error_info_t error_info;
//------------------------------------------------------------------------------
// Public Variables
//------------------------------------------------------------------------------
uint64_t error_count = 0;
//------------------------------------------------------------------------------
// Private Functions
//------------------------------------------------------------------------------
static bool update_error_info(uintptr_t addr, testword_t xor)
{
bool update_stats = false;
// Update address range.
testword_t page = page_of((void *)addr);
testword_t offset = addr & 0xFFF;
if (error_info.min_addr.page > page) {
error_info.min_addr.page = page;
error_info.min_addr.offset = offset;
update_stats = true;
} else if (error_info.min_addr.page == page && error_info.min_addr.offset > offset) {
error_info.min_addr.offset = offset;
update_stats = true;
}
if (error_info.max_addr.page < page) {
error_info.max_addr.page = page;
error_info.max_addr.offset = offset;
update_stats = true;
} else if (error_info.max_addr.page == page && error_info.max_addr.offset < offset) {
error_info.max_addr.offset = offset;
update_stats = true;
}
// Update bits in error.
int bits = 0;
for (int i = 0; i < TESTWORD_WIDTH; i++) {
if ((xor >> i) & 1) {
bits++;
}
}
if (bits > 0 && error_count < ERROR_LIMIT) {
error_info.total_bits += bits;
}
if (bits > error_info.max_bits) {
error_info.max_bits = bits;
update_stats = true;
}
if (bits < error_info.min_bits) {
error_info.min_bits = bits;
update_stats = true;
}
if (error_info.bad_bits ^ xor) {
update_stats = true;
}
error_info.bad_bits |= xor;
// Update max contiguous range.
if (error_info.max_run > 0) {
if (addr == error_info.last_addr + sizeof(testword_t)
|| addr == error_info.last_addr - sizeof(testword_t)) {
error_info.run_length++;
} else {
error_info.run_length = 1;
}
} else {
error_info.run_length = 1;
}
if (error_info.run_length > error_info.max_run) {
error_info.max_run = error_info.run_length;
update_stats = true;
}
return update_stats;
}
static void common_err(error_type_t type, uintptr_t addr, testword_t good, testword_t bad, bool use_for_badram)
{
spin_lock(error_mutex);
bool new_header = (error_count == 0) || (error_mode != last_error_mode);
if (new_header) {
clear_message_area();
badram_init();
}
last_error_mode = error_mode;
testword_t xor = good ^ bad;
bool new_stats = false;
switch (type) {
case ADDR_ERROR:
new_stats = update_error_info(addr, 0);
break;
case DATA_ERROR:
new_stats = update_error_info(addr, xor);
break;
case NEW_MODE:
new_stats = (error_count > 0);
default:
break;
}
bool new_address = (type != NEW_MODE);
bool new_badram = false;
if (error_mode == ERROR_MODE_BADRAM && use_for_badram) {
new_badram = badram_insert(addr);
}
if (new_address) {
if (error_count < ERROR_LIMIT) {
error_count++;
}
if (test_list[test_num].errors < INT_MAX) {
test_list[test_num].errors++;
}
}
switch (error_mode) {
case ERROR_MODE_SUMMARY:
if (type == PARITY_ERROR) {
break;
}
if (new_header) {
display_pinned_message(0, 1, " Lowest Error Address:");
display_pinned_message(1, 1, " Highest Error Address:");
display_pinned_message(2, 1, " Bits in Error Mask:");
display_pinned_message(3, 1, " Bits in Error - Total:");
display_pinned_message(4, 1, " Max Contiguous Errors:");
display_pinned_message(0, 64, "Test Errors");
for (int i = 0; i < NUM_TEST_PATTERNS; i++) {
display_pinned_message(1 + i, 65, "%2i:", i);
}
}
if (new_stats) {
int bits = 0;
for (int i = 0; i < TESTWORD_WIDTH; i++) {
if (error_info.bad_bits >> i & 1) {
bits++;
}
}
display_pinned_message(0, 25, "%09x%03x (%kB)",
error_info.min_addr.page,
error_info.min_addr.offset,
error_info.min_addr.page << 2);
display_pinned_message(1, 25, "%09x%03x (%kB)",
error_info.max_addr.page,
error_info.max_addr.offset,
error_info.max_addr.page << 2);
display_pinned_message(2, 25, "%0*x", TESTWORD_DIGITS,
error_info.bad_bits);
display_pinned_message(3, 25, " %2i Min: %2i Max: %2i Avg: %2i",
bits,
error_info.min_bits,
error_info.max_bits,
(int)(error_info.total_bits / error_count));
display_pinned_message(4, 25, "%u",
error_info.max_run);
for (int i = 0; i < NUM_TEST_PATTERNS; i++) {
display_pinned_message(1 + i, 69, "%c%i",
test_list[i].errors == INT_MAX ? '>' : ' ',
test_list[i].errors);
}
display_error_count(error_count);
}
break;
case ERROR_MODE_ADDRESS:
// Skip duplicates.
if (!new_header && addr == error_info.last_addr && xor == error_info.last_xor) {
break;
}
if (new_header) {
#if TESTWORD_WIDTH > 32
// columns: 0---------1---------2---------3---------4---------5---------6---------7---------
display_pinned_message(0, 0, "pCPU Pass Test Failing Address Expected Found ");
display_pinned_message(1, 0, "---- ---- ---- --------------------- ---------------- ----------------");
// fields: NN NNNN NN PPPPPPPPPOOO (N.NN?B) XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
#else
// columns: 0---------1---------2---------3---------4---------5---------6---------7---------
display_pinned_message(0, 0, "pCPU Pass Test Failing Address Expected Found Err Bits");
display_pinned_message(1, 0, "---- ---- ---- --------------------- -------- -------- --------");
// fields: NN NNNN NN PPPPPPPPPOOO (N.NN?B) XXXXXXXX XXXXXXXX XXXXXXXX
#endif
}
if (new_address) {
check_input();
scroll();
uintptr_t page = page_of((void *)addr);
uintptr_t offset = addr & 0xFFF;
set_foreground_colour(YELLOW);
display_scrolled_message(0, " %2i %4i %2i %09x%03x (%kB)",
smp_my_pcpu_num(), pass_num, test_num, page, offset, page << 2);
if (type == PARITY_ERROR) {
display_scrolled_message(41, "%s", "Parity error detected near this address");
} else {
#if TESTWORD_WIDTH > 32
display_scrolled_message(41, "%016x %016x", good, bad);
#else
display_scrolled_message(41, "%08x %08x %08x %i", good, bad, xor, error_count);
#endif
}
set_foreground_colour(WHITE);
display_error_count(error_count);
}
break;
case ERROR_MODE_BADRAM:
if (new_badram) {
badram_display();
}
break;
default:
break;
}
if (type != PARITY_ERROR) {
error_info.last_addr = addr;
error_info.last_xor = xor;
}
spin_unlock(error_mutex);
}
//------------------------------------------------------------------------------
// Public Functions
//------------------------------------------------------------------------------
void error_init(void)
{
error_info.min_addr.page = UINTPTR_MAX;
error_info.min_addr.offset = 0xfff;
error_info.max_addr.page = 0;
error_info.max_addr.offset = 0;
error_info.bad_bits = 0;
error_info.min_bits = 255;
error_info.max_bits = 0;
error_info.total_bits = 0;
error_info.run_length = 0;
error_info.max_run = 0;
error_info.last_addr = 0;
error_info.last_xor = 0;
error_count = 0;
}
void addr_error(volatile testword_t *addr1, volatile testword_t *addr2, testword_t good, testword_t bad)
{
common_err(ADDR_ERROR, (uintptr_t)addr1, good, bad, false); (void)addr2;
}
void data_error(volatile testword_t *addr, testword_t good, testword_t bad, bool use_for_badram)
{
#if USB_WORKAROUND
/* Skip any errrors that appear to be due to the BIOS using location
* 0x4e0 for USB keyboard support. This often happens with Intel
* 810, 815 and 820 chipsets. It is possible that we will skip
* a real error but the odds are very low.
*/
if ((uintptr_t)addr == 0x4e0 || (uintptr_t)addr == 0x410) {
return;
}
#endif
common_err(DATA_ERROR, (uintptr_t)addr, good, bad, use_for_badram);
}
#if REPORT_PARITY_ERRORS
void parity_error(void)
{
// We don't know the real address that caused the parity error,
// so use the last recorded test address.
common_err(PARITY_ERROR, test_addr[my_vcpu_num()], 0, 0, false);
}
#endif
void error_update(void)
{
if (error_count > 0) {
if (error_mode != last_error_mode) {
common_err(NEW_MODE, 0, 0, 0, false);
}
if (error_mode == ERROR_MODE_SUMMARY && test_list[test_num].errors > 0) {
display_pinned_message(1 + test_num, 69, "%c%i",
test_list[test_num].errors == INT_MAX ? '>' : ' ',
test_list[test_num].errors);
}
display_error_count(error_count);
}
}
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