u-boot/cmd/mem.c
Ralph Siemsen 9989fb18bd cmd: mem: fix range of bitflip test
The bitflip test uses two equal sized memory buffers. This is achieved
by splitting the range of memory into two pieces. The address of the
second buffer, as well as the length of each buffer, were not correctly
calculated. This caused bitflip test to access beyond the end of range.
This patch fixes the pointer arithmetic problem.

A second problem arises because u-boot "mtest" command expects the
ending address to be inclusive. When computing (end - start) this
results in missing 1 byte of the requested length. The bitflip test
expects a count rather than an "ending" address. Thus it fails to test
the last word of the requested range. Fixed by using (end - start + 1).

Added Kconfig option to optionally disable the bitflip test, since it
does add significantly to the time taken for "mtest".

Fixes: 8e434cb705 ("cmd: mem: Add bitflip
memory test to alternate mtest")

Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org>
Reviewed-by: Stefan Roese <sr@denx.de>
2020-09-18 16:19:58 -04:00

1455 lines
32 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/*
* Memory Functions
*
* Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
*/
#include <common.h>
#include <console.h>
#include <bootretry.h>
#include <cli.h>
#include <command.h>
#include <console.h>
#include <flash.h>
#include <hash.h>
#include <log.h>
#include <mapmem.h>
#include <rand.h>
#include <watchdog.h>
#include <asm/io.h>
#include <linux/bitops.h>
#include <linux/compiler.h>
#include <linux/ctype.h>
#include <linux/delay.h>
DECLARE_GLOBAL_DATA_PTR;
/* Create a compile-time value */
#ifdef MEM_SUPPORT_64BIT_DATA
#define SUPPORT_64BIT_DATA 1
#define HELP_Q ", .q"
#else
#define SUPPORT_64BIT_DATA 0
#define HELP_Q ""
#endif
static int mod_mem(struct cmd_tbl *, int, int, int, char * const []);
/* Display values from last command.
* Memory modify remembered values are different from display memory.
*/
static ulong dp_last_addr, dp_last_size;
static ulong dp_last_length = 0x40;
static ulong mm_last_addr, mm_last_size;
static ulong base_address = 0;
#ifdef CONFIG_CMD_MEM_SEARCH
static ulong dp_last_ms_length;
static u8 search_buf[64];
static uint search_len;
#endif
/* Memory Display
*
* Syntax:
* md{.b, .w, .l, .q} {addr} {len}
*/
#define DISP_LINE_LEN 16
static int do_mem_md(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr, length, bytes;
const void *buf;
int size;
int rc = 0;
/* We use the last specified parameters, unless new ones are
* entered.
*/
addr = dp_last_addr;
size = dp_last_size;
length = dp_last_length;
if (argc < 2)
return CMD_RET_USAGE;
if ((flag & CMD_FLAG_REPEAT) == 0) {
/* New command specified. Check for a size specification.
* Defaults to long if no or incorrect specification.
*/
if ((size = cmd_get_data_size(argv[0], 4)) < 0)
return 1;
/* Address is specified since argc > 1
*/
addr = simple_strtoul(argv[1], NULL, 16);
addr += base_address;
/* If another parameter, it is the length to display.
* Length is the number of objects, not number of bytes.
*/
if (argc > 2)
length = simple_strtoul(argv[2], NULL, 16);
}
bytes = size * length;
buf = map_sysmem(addr, bytes);
/* Print the lines. */
print_buffer(addr, buf, size, length, DISP_LINE_LEN / size);
addr += bytes;
unmap_sysmem(buf);
dp_last_addr = addr;
dp_last_length = length;
dp_last_size = size;
return (rc);
}
static int do_mem_mm(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return mod_mem (cmdtp, 1, flag, argc, argv);
}
static int do_mem_nm(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return mod_mem (cmdtp, 0, flag, argc, argv);
}
static int do_mem_mw(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong writeval; /* 64-bit if SUPPORT_64BIT_DATA */
ulong addr, count;
int size;
void *buf, *start;
ulong bytes;
if ((argc < 3) || (argc > 4))
return CMD_RET_USAGE;
/* Check for size specification.
*/
if ((size = cmd_get_data_size(argv[0], 4)) < 1)
return 1;
/* Address is specified since argc > 1
*/
addr = simple_strtoul(argv[1], NULL, 16);
addr += base_address;
/* Get the value to write.
*/
if (SUPPORT_64BIT_DATA)
writeval = simple_strtoull(argv[2], NULL, 16);
else
writeval = simple_strtoul(argv[2], NULL, 16);
/* Count ? */
if (argc == 4) {
count = simple_strtoul(argv[3], NULL, 16);
} else {
count = 1;
}
bytes = size * count;
start = map_sysmem(addr, bytes);
buf = start;
while (count-- > 0) {
if (size == 4)
*((u32 *)buf) = (u32)writeval;
else if (SUPPORT_64BIT_DATA && size == 8)
*((ulong *)buf) = writeval;
else if (size == 2)
*((u16 *)buf) = (u16)writeval;
else
*((u8 *)buf) = (u8)writeval;
buf += size;
}
unmap_sysmem(start);
return 0;
}
#ifdef CONFIG_CMD_MX_CYCLIC
static int do_mem_mdc(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int i;
ulong count;
if (argc < 4)
return CMD_RET_USAGE;
count = simple_strtoul(argv[3], NULL, 10);
for (;;) {
do_mem_md (NULL, 0, 3, argv);
/* delay for <count> ms... */
for (i=0; i<count; i++)
udelay(1000);
/* check for ctrl-c to abort... */
if (ctrlc()) {
puts("Abort\n");
return 0;
}
}
return 0;
}
static int do_mem_mwc(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int i;
ulong count;
if (argc < 4)
return CMD_RET_USAGE;
count = simple_strtoul(argv[3], NULL, 10);
for (;;) {
do_mem_mw (NULL, 0, 3, argv);
/* delay for <count> ms... */
for (i=0; i<count; i++)
udelay(1000);
/* check for ctrl-c to abort... */
if (ctrlc()) {
puts("Abort\n");
return 0;
}
}
return 0;
}
#endif /* CONFIG_CMD_MX_CYCLIC */
static int do_mem_cmp(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr1, addr2, count, ngood, bytes;
int size;
int rcode = 0;
const char *type;
const void *buf1, *buf2, *base;
ulong word1, word2; /* 64-bit if SUPPORT_64BIT_DATA */
if (argc != 4)
return CMD_RET_USAGE;
/* Check for size specification.
*/
if ((size = cmd_get_data_size(argv[0], 4)) < 0)
return 1;
type = size == 8 ? "double word" :
size == 4 ? "word" :
size == 2 ? "halfword" : "byte";
addr1 = simple_strtoul(argv[1], NULL, 16);
addr1 += base_address;
addr2 = simple_strtoul(argv[2], NULL, 16);
addr2 += base_address;
count = simple_strtoul(argv[3], NULL, 16);
bytes = size * count;
base = buf1 = map_sysmem(addr1, bytes);
buf2 = map_sysmem(addr2, bytes);
for (ngood = 0; ngood < count; ++ngood) {
if (size == 4) {
word1 = *(u32 *)buf1;
word2 = *(u32 *)buf2;
} else if (SUPPORT_64BIT_DATA && size == 8) {
word1 = *(ulong *)buf1;
word2 = *(ulong *)buf2;
} else if (size == 2) {
word1 = *(u16 *)buf1;
word2 = *(u16 *)buf2;
} else {
word1 = *(u8 *)buf1;
word2 = *(u8 *)buf2;
}
if (word1 != word2) {
ulong offset = buf1 - base;
printf("%s at 0x%08lx (%#0*lx) != %s at 0x%08lx (%#0*lx)\n",
type, (ulong)(addr1 + offset), size, word1,
type, (ulong)(addr2 + offset), size, word2);
rcode = 1;
break;
}
buf1 += size;
buf2 += size;
/* reset watchdog from time to time */
if ((ngood % (64 << 10)) == 0)
WATCHDOG_RESET();
}
unmap_sysmem(buf1);
unmap_sysmem(buf2);
printf("Total of %ld %s(s) were the same\n", ngood, type);
return rcode;
}
static int do_mem_cp(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr, dest, count;
void *src, *dst;
int size;
if (argc != 4)
return CMD_RET_USAGE;
/* Check for size specification.
*/
if ((size = cmd_get_data_size(argv[0], 4)) < 0)
return 1;
addr = simple_strtoul(argv[1], NULL, 16);
addr += base_address;
dest = simple_strtoul(argv[2], NULL, 16);
dest += base_address;
count = simple_strtoul(argv[3], NULL, 16);
if (count == 0) {
puts ("Zero length ???\n");
return 1;
}
src = map_sysmem(addr, count * size);
dst = map_sysmem(dest, count * size);
#ifdef CONFIG_MTD_NOR_FLASH
/* check if we are copying to Flash */
if (addr2info((ulong)dst)) {
int rc;
puts ("Copy to Flash... ");
rc = flash_write((char *)src, (ulong)dst, count * size);
if (rc != 0) {
flash_perror(rc);
unmap_sysmem(src);
unmap_sysmem(dst);
return (1);
}
puts ("done\n");
unmap_sysmem(src);
unmap_sysmem(dst);
return 0;
}
#endif
memcpy(dst, src, count * size);
unmap_sysmem(src);
unmap_sysmem(dst);
return 0;
}
#ifdef CONFIG_CMD_MEM_SEARCH
static int do_mem_search(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr, length, bytes, offset;
u8 *ptr, *end, *buf;
bool quiet = false;
ulong last_pos; /* Offset of last match in 'size' units*/
ulong last_addr; /* Address of last displayed line */
int limit = 10;
int used_len;
int count;
int size;
int i;
/* We use the last specified parameters, unless new ones are entered */
addr = dp_last_addr;
size = dp_last_size;
length = dp_last_ms_length;
if (argc < 3)
return CMD_RET_USAGE;
if (!(flag & CMD_FLAG_REPEAT)) {
/*
* Check for a size specification.
* Defaults to long if no or incorrect specification.
*/
size = cmd_get_data_size(argv[0], 4);
if (size < 0 && size != -2 /* string */)
return 1;
argc--;
argv++;
while (argc && *argv[0] == '-') {
int ch = argv[0][1];
if (ch == 'q')
quiet = true;
else if (ch == 'l' && isxdigit(argv[0][2]))
limit = simple_strtoul(argv[0] + 2, NULL, 16);
else
return CMD_RET_USAGE;
argc--;
argv++;
}
/* Address is specified since argc > 1 */
addr = simple_strtoul(argv[0], NULL, 16);
addr += base_address;
/* Length is the number of objects, not number of bytes */
length = simple_strtoul(argv[1], NULL, 16);
/* Read the bytes to search for */
end = search_buf + sizeof(search_buf);
for (i = 2, ptr = search_buf; i < argc && ptr < end; i++) {
if (MEM_SUPPORT_64BIT_DATA && size == 8) {
u64 val = simple_strtoull(argv[i], NULL, 16);
*(u64 *)ptr = val;
} else if (size == -2) { /* string */
int len = min(strlen(argv[i]),
(size_t)(end - ptr));
memcpy(ptr, argv[i], len);
ptr += len;
continue;
} else {
u32 val = simple_strtoul(argv[i], NULL, 16);
switch (size) {
case 1:
*ptr = val;
break;
case 2:
*(u16 *)ptr = val;
break;
case 4:
*(u32 *)ptr = val;
break;
}
}
ptr += size;
}
search_len = ptr - search_buf;
}
/* Do the search */
if (size == -2)
size = 1;
bytes = size * length;
buf = map_sysmem(addr, bytes);
last_pos = 0;
last_addr = 0;
count = 0;
for (offset = 0;
offset < bytes && offset <= bytes - search_len && count < limit;
offset += size) {
void *ptr = buf + offset;
if (!memcmp(ptr, search_buf, search_len)) {
uint align = (addr + offset) & 0xf;
ulong match = addr + offset;
if (!count || (last_addr & ~0xf) != (match & ~0xf)) {
if (!quiet) {
if (count)
printf("--\n");
print_buffer(match - align, ptr - align,
size,
ALIGN(search_len + align,
16) / size, 0);
}
last_addr = match;
last_pos = offset / size;
}
count++;
}
}
if (!quiet) {
printf("%d match%s", count, count == 1 ? "" : "es");
if (count == limit)
printf(" (repeat command to check for more)");
printf("\n");
}
env_set_hex("memmatches", count);
env_set_hex("memaddr", last_addr);
env_set_hex("mempos", last_pos);
unmap_sysmem(buf);
used_len = offset / size;
dp_last_addr = addr + used_len;
dp_last_size = size;
dp_last_ms_length = length < used_len ? 0 : length - used_len;
return count ? 0 : CMD_RET_FAILURE;
}
#endif
static int do_mem_base(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
if (argc > 1) {
/* Set new base address.
*/
base_address = simple_strtoul(argv[1], NULL, 16);
}
/* Print the current base address.
*/
printf("Base Address: 0x%08lx\n", base_address);
return 0;
}
static int do_mem_loop(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr, length, i, bytes;
int size;
volatile ulong *llp; /* 64-bit if SUPPORT_64BIT_DATA */
volatile u32 *longp;
volatile u16 *shortp;
volatile u8 *cp;
const void *buf;
if (argc < 3)
return CMD_RET_USAGE;
/*
* Check for a size specification.
* Defaults to long if no or incorrect specification.
*/
if ((size = cmd_get_data_size(argv[0], 4)) < 0)
return 1;
/* Address is always specified.
*/
addr = simple_strtoul(argv[1], NULL, 16);
/* Length is the number of objects, not number of bytes.
*/
length = simple_strtoul(argv[2], NULL, 16);
bytes = size * length;
buf = map_sysmem(addr, bytes);
/* We want to optimize the loops to run as fast as possible.
* If we have only one object, just run infinite loops.
*/
if (length == 1) {
if (SUPPORT_64BIT_DATA && size == 8) {
llp = (ulong *)buf;
for (;;)
i = *llp;
}
if (size == 4) {
longp = (u32 *)buf;
for (;;)
i = *longp;
}
if (size == 2) {
shortp = (u16 *)buf;
for (;;)
i = *shortp;
}
cp = (u8 *)buf;
for (;;)
i = *cp;
}
if (SUPPORT_64BIT_DATA && size == 8) {
for (;;) {
llp = (ulong *)buf;
i = length;
while (i-- > 0)
*llp++;
}
}
if (size == 4) {
for (;;) {
longp = (u32 *)buf;
i = length;
while (i-- > 0)
*longp++;
}
}
if (size == 2) {
for (;;) {
shortp = (u16 *)buf;
i = length;
while (i-- > 0)
*shortp++;
}
}
for (;;) {
cp = (u8 *)buf;
i = length;
while (i-- > 0)
*cp++;
}
unmap_sysmem(buf);
return 0;
}
#ifdef CONFIG_LOOPW
static int do_mem_loopw(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr, length, i, bytes;
int size;
volatile ulong *llp; /* 64-bit if SUPPORT_64BIT_DATA */
ulong data; /* 64-bit if SUPPORT_64BIT_DATA */
volatile u32 *longp;
volatile u16 *shortp;
volatile u8 *cp;
void *buf;
if (argc < 4)
return CMD_RET_USAGE;
/*
* Check for a size specification.
* Defaults to long if no or incorrect specification.
*/
if ((size = cmd_get_data_size(argv[0], 4)) < 0)
return 1;
/* Address is always specified.
*/
addr = simple_strtoul(argv[1], NULL, 16);
/* Length is the number of objects, not number of bytes.
*/
length = simple_strtoul(argv[2], NULL, 16);
/* data to write */
if (SUPPORT_64BIT_DATA)
data = simple_strtoull(argv[3], NULL, 16);
else
data = simple_strtoul(argv[3], NULL, 16);
bytes = size * length;
buf = map_sysmem(addr, bytes);
/* We want to optimize the loops to run as fast as possible.
* If we have only one object, just run infinite loops.
*/
if (length == 1) {
if (SUPPORT_64BIT_DATA && size == 8) {
llp = (ulong *)buf;
for (;;)
*llp = data;
}
if (size == 4) {
longp = (u32 *)buf;
for (;;)
*longp = data;
}
if (size == 2) {
shortp = (u16 *)buf;
for (;;)
*shortp = data;
}
cp = (u8 *)buf;
for (;;)
*cp = data;
}
if (SUPPORT_64BIT_DATA && size == 8) {
for (;;) {
llp = (ulong *)buf;
i = length;
while (i-- > 0)
*llp++ = data;
}
}
if (size == 4) {
for (;;) {
longp = (u32 *)buf;
i = length;
while (i-- > 0)
*longp++ = data;
}
}
if (size == 2) {
for (;;) {
shortp = (u16 *)buf;
i = length;
while (i-- > 0)
*shortp++ = data;
}
}
for (;;) {
cp = (u8 *)buf;
i = length;
while (i-- > 0)
*cp++ = data;
}
}
#endif /* CONFIG_LOOPW */
#ifdef CONFIG_CMD_MEMTEST
static ulong mem_test_alt(vu_long *buf, ulong start_addr, ulong end_addr,
vu_long *dummy)
{
vu_long *addr;
ulong errs = 0;
ulong val, readback;
int j;
vu_long offset;
vu_long test_offset;
vu_long pattern;
vu_long temp;
vu_long anti_pattern;
vu_long num_words;
static const ulong bitpattern[] = {
0x00000001, /* single bit */
0x00000003, /* two adjacent bits */
0x00000007, /* three adjacent bits */
0x0000000F, /* four adjacent bits */
0x00000005, /* two non-adjacent bits */
0x00000015, /* three non-adjacent bits */
0x00000055, /* four non-adjacent bits */
0xaaaaaaaa, /* alternating 1/0 */
};
num_words = (end_addr - start_addr) / sizeof(vu_long);
/*
* Data line test: write a pattern to the first
* location, write the 1's complement to a 'parking'
* address (changes the state of the data bus so a
* floating bus doesn't give a false OK), and then
* read the value back. Note that we read it back
* into a variable because the next time we read it,
* it might be right (been there, tough to explain to
* the quality guys why it prints a failure when the
* "is" and "should be" are obviously the same in the
* error message).
*
* Rather than exhaustively testing, we test some
* patterns by shifting '1' bits through a field of
* '0's and '0' bits through a field of '1's (i.e.
* pattern and ~pattern).
*/
addr = buf;
for (j = 0; j < sizeof(bitpattern) / sizeof(bitpattern[0]); j++) {
val = bitpattern[j];
for (; val != 0; val <<= 1) {
*addr = val;
*dummy = ~val; /* clear the test data off the bus */
readback = *addr;
if (readback != val) {
printf("FAILURE (data line): "
"expected %08lx, actual %08lx\n",
val, readback);
errs++;
if (ctrlc())
return -1;
}
*addr = ~val;
*dummy = val;
readback = *addr;
if (readback != ~val) {
printf("FAILURE (data line): "
"Is %08lx, should be %08lx\n",
readback, ~val);
errs++;
if (ctrlc())
return -1;
}
}
}
/*
* Based on code whose Original Author and Copyright
* information follows: Copyright (c) 1998 by Michael
* Barr. This software is placed into the public
* domain and may be used for any purpose. However,
* this notice must not be changed or removed and no
* warranty is either expressed or implied by its
* publication or distribution.
*/
/*
* Address line test
* Description: Test the address bus wiring in a
* memory region by performing a walking
* 1's test on the relevant bits of the
* address and checking for aliasing.
* This test will find single-bit
* address failures such as stuck-high,
* stuck-low, and shorted pins. The base
* address and size of the region are
* selected by the caller.
* Notes: For best results, the selected base
* address should have enough LSB 0's to
* guarantee single address bit changes.
* For example, to test a 64-Kbyte
* region, select a base address on a
* 64-Kbyte boundary. Also, select the
* region size as a power-of-two if at
* all possible.
*
* Returns: 0 if the test succeeds, 1 if the test fails.
*/
pattern = (vu_long) 0xaaaaaaaa;
anti_pattern = (vu_long) 0x55555555;
debug("%s:%d: length = 0x%.8lx\n", __func__, __LINE__, num_words);
/*
* Write the default pattern at each of the
* power-of-two offsets.
*/
for (offset = 1; offset < num_words; offset <<= 1)
addr[offset] = pattern;
/*
* Check for address bits stuck high.
*/
test_offset = 0;
addr[test_offset] = anti_pattern;
for (offset = 1; offset < num_words; offset <<= 1) {
temp = addr[offset];
if (temp != pattern) {
printf("\nFAILURE: Address bit stuck high @ 0x%.8lx:"
" expected 0x%.8lx, actual 0x%.8lx\n",
start_addr + offset*sizeof(vu_long),
pattern, temp);
errs++;
if (ctrlc())
return -1;
}
}
addr[test_offset] = pattern;
WATCHDOG_RESET();
/*
* Check for addr bits stuck low or shorted.
*/
for (test_offset = 1; test_offset < num_words; test_offset <<= 1) {
addr[test_offset] = anti_pattern;
for (offset = 1; offset < num_words; offset <<= 1) {
temp = addr[offset];
if ((temp != pattern) && (offset != test_offset)) {
printf("\nFAILURE: Address bit stuck low or"
" shorted @ 0x%.8lx: expected 0x%.8lx,"
" actual 0x%.8lx\n",
start_addr + offset*sizeof(vu_long),
pattern, temp);
errs++;
if (ctrlc())
return -1;
}
}
addr[test_offset] = pattern;
}
/*
* Description: Test the integrity of a physical
* memory device by performing an
* increment/decrement test over the
* entire region. In the process every
* storage bit in the device is tested
* as a zero and a one. The base address
* and the size of the region are
* selected by the caller.
*
* Returns: 0 if the test succeeds, 1 if the test fails.
*/
num_words++;
/*
* Fill memory with a known pattern.
*/
for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
WATCHDOG_RESET();
addr[offset] = pattern;
}
/*
* Check each location and invert it for the second pass.
*/
for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
WATCHDOG_RESET();
temp = addr[offset];
if (temp != pattern) {
printf("\nFAILURE (read/write) @ 0x%.8lx:"
" expected 0x%.8lx, actual 0x%.8lx)\n",
start_addr + offset*sizeof(vu_long),
pattern, temp);
errs++;
if (ctrlc())
return -1;
}
anti_pattern = ~pattern;
addr[offset] = anti_pattern;
}
/*
* Check each location for the inverted pattern and zero it.
*/
for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
WATCHDOG_RESET();
anti_pattern = ~pattern;
temp = addr[offset];
if (temp != anti_pattern) {
printf("\nFAILURE (read/write): @ 0x%.8lx:"
" expected 0x%.8lx, actual 0x%.8lx)\n",
start_addr + offset*sizeof(vu_long),
anti_pattern, temp);
errs++;
if (ctrlc())
return -1;
}
addr[offset] = 0;
}
return errs;
}
static int compare_regions(volatile unsigned long *bufa,
volatile unsigned long *bufb, size_t count)
{
volatile unsigned long *p1 = bufa;
volatile unsigned long *p2 = bufb;
int errs = 0;
size_t i;
for (i = 0; i < count; i++, p1++, p2++) {
if (*p1 != *p2) {
printf("FAILURE: 0x%08lx != 0x%08lx (delta=0x%08lx -> bit %ld) at offset 0x%08lx\n",
(unsigned long)*p1, (unsigned long)*p2,
*p1 ^ *p2, __ffs(*p1 ^ *p2),
(unsigned long)(i * sizeof(unsigned long)));
errs++;
}
}
return errs;
}
static ulong test_bitflip_comparison(volatile unsigned long *bufa,
volatile unsigned long *bufb, size_t count)
{
volatile unsigned long *p1 = bufa;
volatile unsigned long *p2 = bufb;
unsigned int j, k;
unsigned long q;
size_t i;
int max;
int errs = 0;
max = sizeof(unsigned long) * 8;
for (k = 0; k < max; k++) {
q = 0x00000001L << k;
for (j = 0; j < 8; j++) {
WATCHDOG_RESET();
q = ~q;
p1 = (volatile unsigned long *)bufa;
p2 = (volatile unsigned long *)bufb;
for (i = 0; i < count; i++)
*p1++ = *p2++ = (i % 2) == 0 ? q : ~q;
errs += compare_regions(bufa, bufb, count);
}
if (ctrlc())
return -1UL;
}
return errs;
}
static ulong mem_test_bitflip(vu_long *buf, ulong start, ulong end)
{
/*
* Split the specified range into two halves.
* Note that mtest range is inclusive of start,end.
* Bitflip test instead uses a count (of 32-bit words).
*/
ulong half_size = (end - start + 1) / 2 / sizeof(unsigned long);
return test_bitflip_comparison(buf, buf + half_size, half_size);
}
static ulong mem_test_quick(vu_long *buf, ulong start_addr, ulong end_addr,
vu_long pattern, int iteration)
{
vu_long *end;
vu_long *addr;
ulong errs = 0;
ulong incr, length;
ulong val, readback;
/* Alternate the pattern */
incr = 1;
if (iteration & 1) {
incr = -incr;
/*
* Flip the pattern each time to make lots of zeros and
* then, the next time, lots of ones. We decrement
* the "negative" patterns and increment the "positive"
* patterns to preserve this feature.
*/
if (pattern & 0x80000000)
pattern = -pattern; /* complement & increment */
else
pattern = ~pattern;
}
length = (end_addr - start_addr) / sizeof(ulong);
end = buf + length;
printf("\rPattern %08lX Writing..."
"%12s"
"\b\b\b\b\b\b\b\b\b\b",
pattern, "");
for (addr = buf, val = pattern; addr < end; addr++) {
WATCHDOG_RESET();
*addr = val;
val += incr;
}
puts("Reading...");
for (addr = buf, val = pattern; addr < end; addr++) {
WATCHDOG_RESET();
readback = *addr;
if (readback != val) {
ulong offset = addr - buf;
printf("\nMem error @ 0x%08X: "
"found %08lX, expected %08lX\n",
(uint)(uintptr_t)(start_addr + offset*sizeof(vu_long)),
readback, val);
errs++;
if (ctrlc())
return -1;
}
val += incr;
}
return errs;
}
/*
* Perform a memory test. A more complete alternative test can be
* configured using CONFIG_SYS_ALT_MEMTEST. The complete test loops until
* interrupted by ctrl-c or by a failure of one of the sub-tests.
*/
static int do_mem_mtest(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong start, end;
vu_long scratch_space;
vu_long *buf, *dummy = &scratch_space;
ulong iteration_limit = 0;
ulong count = 0;
ulong errs = 0; /* number of errors, or -1 if interrupted */
ulong pattern = 0;
int iteration;
start = CONFIG_SYS_MEMTEST_START;
end = CONFIG_SYS_MEMTEST_END;
if (argc > 1)
if (strict_strtoul(argv[1], 16, &start) < 0)
return CMD_RET_USAGE;
if (argc > 2)
if (strict_strtoul(argv[2], 16, &end) < 0)
return CMD_RET_USAGE;
if (argc > 3)
if (strict_strtoul(argv[3], 16, &pattern) < 0)
return CMD_RET_USAGE;
if (argc > 4)
if (strict_strtoul(argv[4], 16, &iteration_limit) < 0)
return CMD_RET_USAGE;
if (end < start) {
printf("Refusing to do empty test\n");
return -1;
}
printf("Testing %08lx ... %08lx:\n", start, end);
debug("%s:%d: start %#08lx end %#08lx\n", __func__, __LINE__,
start, end);
buf = map_sysmem(start, end - start);
for (iteration = 0;
!iteration_limit || iteration < iteration_limit;
iteration++) {
if (ctrlc()) {
errs = -1UL;
break;
}
printf("Iteration: %6d\r", iteration + 1);
debug("\n");
if (IS_ENABLED(CONFIG_SYS_ALT_MEMTEST)) {
errs = mem_test_alt(buf, start, end, dummy);
if (errs == -1UL)
break;
if (IS_ENABLED(CONFIG_SYS_ALT_MEMTEST_BITFLIP)) {
count += errs;
errs = mem_test_bitflip(buf, start, end);
}
} else {
errs = mem_test_quick(buf, start, end, pattern,
iteration);
}
if (errs == -1UL)
break;
count += errs;
}
unmap_sysmem((void *)buf);
if (errs == -1UL) {
/* Memory test was aborted - write a newline to finish off */
putc('\n');
}
printf("Tested %d iteration(s) with %lu errors.\n", iteration, count);
return errs != 0;
}
#endif /* CONFIG_CMD_MEMTEST */
/* Modify memory.
*
* Syntax:
* mm{.b, .w, .l, .q} {addr}
*/
static int
mod_mem(struct cmd_tbl *cmdtp, int incrflag, int flag, int argc,
char *const argv[])
{
ulong addr;
ulong i; /* 64-bit if SUPPORT_64BIT_DATA */
int nbytes, size;
void *ptr = NULL;
if (argc != 2)
return CMD_RET_USAGE;
bootretry_reset_cmd_timeout(); /* got a good command to get here */
/* We use the last specified parameters, unless new ones are
* entered.
*/
addr = mm_last_addr;
size = mm_last_size;
if ((flag & CMD_FLAG_REPEAT) == 0) {
/* New command specified. Check for a size specification.
* Defaults to long if no or incorrect specification.
*/
if ((size = cmd_get_data_size(argv[0], 4)) < 0)
return 1;
/* Address is specified since argc > 1
*/
addr = simple_strtoul(argv[1], NULL, 16);
addr += base_address;
}
/* Print the address, followed by value. Then accept input for
* the next value. A non-converted value exits.
*/
do {
ptr = map_sysmem(addr, size);
printf("%08lx:", addr);
if (size == 4)
printf(" %08x", *((u32 *)ptr));
else if (SUPPORT_64BIT_DATA && size == 8)
printf(" %0lx", *((ulong *)ptr));
else if (size == 2)
printf(" %04x", *((u16 *)ptr));
else
printf(" %02x", *((u8 *)ptr));
nbytes = cli_readline(" ? ");
if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
/* <CR> pressed as only input, don't modify current
* location and move to next. "-" pressed will go back.
*/
if (incrflag)
addr += nbytes ? -size : size;
nbytes = 1;
/* good enough to not time out */
bootretry_reset_cmd_timeout();
}
#ifdef CONFIG_BOOT_RETRY_TIME
else if (nbytes == -2) {
break; /* timed out, exit the command */
}
#endif
else {
char *endp;
if (SUPPORT_64BIT_DATA)
i = simple_strtoull(console_buffer, &endp, 16);
else
i = simple_strtoul(console_buffer, &endp, 16);
nbytes = endp - console_buffer;
if (nbytes) {
/* good enough to not time out
*/
bootretry_reset_cmd_timeout();
if (size == 4)
*((u32 *)ptr) = i;
else if (SUPPORT_64BIT_DATA && size == 8)
*((ulong *)ptr) = i;
else if (size == 2)
*((u16 *)ptr) = i;
else
*((u8 *)ptr) = i;
if (incrflag)
addr += size;
}
}
} while (nbytes);
if (ptr)
unmap_sysmem(ptr);
mm_last_addr = addr;
mm_last_size = size;
return 0;
}
#ifdef CONFIG_CMD_CRC32
static int do_mem_crc(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int flags = 0;
int ac;
char * const *av;
if (argc < 3)
return CMD_RET_USAGE;
av = argv + 1;
ac = argc - 1;
#ifdef CONFIG_CRC32_VERIFY
if (strcmp(*av, "-v") == 0) {
flags |= HASH_FLAG_VERIFY | HASH_FLAG_ENV;
av++;
ac--;
}
#endif
return hash_command("crc32", flags, cmdtp, flag, ac, av);
}
#endif
#ifdef CONFIG_CMD_RANDOM
static int do_random(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
unsigned long addr, len;
unsigned long seed; // NOT INITIALIZED ON PURPOSE
unsigned int *buf, *start;
unsigned char *buf8;
unsigned int i;
if (argc < 3 || argc > 4)
return CMD_RET_USAGE;
len = simple_strtoul(argv[2], NULL, 16);
addr = simple_strtoul(argv[1], NULL, 16);
if (argc == 4) {
seed = simple_strtoul(argv[3], NULL, 16);
if (seed == 0) {
printf("The seed cannot be 0. Using 0xDEADBEEF.\n");
seed = 0xDEADBEEF;
}
} else {
seed = get_timer(0) ^ rand();
}
srand(seed);
start = map_sysmem(addr, len);
buf = start;
for (i = 0; i < (len / 4); i++)
*buf++ = rand();
buf8 = (unsigned char *)buf;
for (i = 0; i < (len % 4); i++)
*buf8++ = rand() & 0xFF;
unmap_sysmem(start);
printf("%lu bytes filled with random data\n", len);
return CMD_RET_SUCCESS;
}
#endif
/**************************************************/
U_BOOT_CMD(
md, 3, 1, do_mem_md,
"memory display",
"[.b, .w, .l" HELP_Q "] address [# of objects]"
);
U_BOOT_CMD(
mm, 2, 1, do_mem_mm,
"memory modify (auto-incrementing address)",
"[.b, .w, .l" HELP_Q "] address"
);
U_BOOT_CMD(
nm, 2, 1, do_mem_nm,
"memory modify (constant address)",
"[.b, .w, .l" HELP_Q "] address"
);
U_BOOT_CMD(
mw, 4, 1, do_mem_mw,
"memory write (fill)",
"[.b, .w, .l" HELP_Q "] address value [count]"
);
U_BOOT_CMD(
cp, 4, 1, do_mem_cp,
"memory copy",
"[.b, .w, .l" HELP_Q "] source target count"
);
U_BOOT_CMD(
cmp, 4, 1, do_mem_cmp,
"memory compare",
"[.b, .w, .l" HELP_Q "] addr1 addr2 count"
);
#ifdef CONFIG_CMD_MEM_SEARCH
/**************************************************/
U_BOOT_CMD(
ms, 255, 1, do_mem_search,
"memory search",
"[.b, .w, .l" HELP_Q ", .s] [-q | -<n>] address #-of-objects <value>..."
" -q = quiet, -l<val> = match limit"
);
#endif
#ifdef CONFIG_CMD_CRC32
#ifndef CONFIG_CRC32_VERIFY
U_BOOT_CMD(
crc32, 4, 1, do_mem_crc,
"checksum calculation",
"address count [addr]\n - compute CRC32 checksum [save at addr]"
);
#else /* CONFIG_CRC32_VERIFY */
U_BOOT_CMD(
crc32, 5, 1, do_mem_crc,
"checksum calculation",
"address count [addr]\n - compute CRC32 checksum [save at addr]\n"
"-v address count crc\n - verify crc of memory area"
);
#endif /* CONFIG_CRC32_VERIFY */
#endif
#ifdef CONFIG_CMD_MEMINFO
static int do_mem_info(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
puts("DRAM: ");
print_size(gd->ram_size, "\n");
return 0;
}
#endif
U_BOOT_CMD(
base, 2, 1, do_mem_base,
"print or set address offset",
"\n - print address offset for memory commands\n"
"base off\n - set address offset for memory commands to 'off'"
);
U_BOOT_CMD(
loop, 3, 1, do_mem_loop,
"infinite loop on address range",
"[.b, .w, .l" HELP_Q "] address number_of_objects"
);
#ifdef CONFIG_LOOPW
U_BOOT_CMD(
loopw, 4, 1, do_mem_loopw,
"infinite write loop on address range",
"[.b, .w, .l" HELP_Q "] address number_of_objects data_to_write"
);
#endif /* CONFIG_LOOPW */
#ifdef CONFIG_CMD_MEMTEST
U_BOOT_CMD(
mtest, 5, 1, do_mem_mtest,
"simple RAM read/write test",
"[start [end [pattern [iterations]]]]"
);
#endif /* CONFIG_CMD_MEMTEST */
#ifdef CONFIG_CMD_MX_CYCLIC
U_BOOT_CMD(
mdc, 4, 1, do_mem_mdc,
"memory display cyclic",
"[.b, .w, .l" HELP_Q "] address count delay(ms)"
);
U_BOOT_CMD(
mwc, 4, 1, do_mem_mwc,
"memory write cyclic",
"[.b, .w, .l" HELP_Q "] address value delay(ms)"
);
#endif /* CONFIG_CMD_MX_CYCLIC */
#ifdef CONFIG_CMD_MEMINFO
U_BOOT_CMD(
meminfo, 3, 1, do_mem_info,
"display memory information",
""
);
#endif
#ifdef CONFIG_CMD_RANDOM
U_BOOT_CMD(
random, 4, 0, do_random,
"fill memory with random pattern",
"<addr> <len> [<seed>]\n"
" - Fill 'len' bytes of memory starting at 'addr' with random data\n"
);
#endif