]>
git.ipfire.org Git - people/ms/u-boot.git/blob - common/cmd_mem.c
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
32 #if (CONFIG_COMMANDS & CFG_CMD_MMC)
35 #ifdef CONFIG_HAS_DATAFLASH
36 #include <dataflash.h>
39 #if (CONFIG_COMMANDS & (CFG_CMD_MEMORY | \
43 int cmd_get_data_size(char* arg
, int default_size
)
45 /* Check for a size specification .b, .w or .l.
47 int len
= strlen(arg
);
48 if (len
> 2 && arg
[len
-2] == '.') {
64 #if (CONFIG_COMMANDS & CFG_CMD_MEMORY)
67 #define PRINTF(fmt,args...) printf (fmt ,##args)
69 #define PRINTF(fmt,args...)
72 static int mod_mem(cmd_tbl_t
*, int, int, int, char *[]);
74 /* Display values from last command.
75 * Memory modify remembered values are different from display memory.
77 uint dp_last_addr
, dp_last_size
;
78 uint dp_last_length
= 0x40;
79 uint mm_last_addr
, mm_last_size
;
81 static ulong base_address
= 0;
86 * md{.b, .w, .l} {addr} {len}
88 #define DISP_LINE_LEN 16
89 int do_mem_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
92 ulong i
, nbytes
, linebytes
;
97 /* We use the last specified parameters, unless new ones are
102 length
= dp_last_length
;
105 printf ("Usage:\n%s\n", cmdtp
->usage
);
109 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
110 /* New command specified. Check for a size specification.
111 * Defaults to long if no or incorrect specification.
113 if ((size
= cmd_get_data_size(argv
[0], 4)) < 0)
116 /* Address is specified since argc > 1
118 addr
= simple_strtoul(argv
[1], NULL
, 16);
119 addr
+= base_address
;
121 /* If another parameter, it is the length to display.
122 * Length is the number of objects, not number of bytes.
125 length
= simple_strtoul(argv
[2], NULL
, 16);
130 * We buffer all read data, so we can make sure data is read only
131 * once, and all accesses are with the specified bus width.
133 nbytes
= length
* size
;
135 char linebuf
[DISP_LINE_LEN
];
136 uint
*uip
= (uint
*)linebuf
;
137 ushort
*usp
= (ushort
*)linebuf
;
138 u_char
*ucp
= (u_char
*)linebuf
;
139 #ifdef CONFIG_HAS_DATAFLASH
142 printf("%08lx:", addr
);
143 linebytes
= (nbytes
>DISP_LINE_LEN
)?DISP_LINE_LEN
:nbytes
;
145 #ifdef CONFIG_HAS_DATAFLASH
146 if ((rc
= read_dataflash(addr
, (linebytes
/size
)*size
, linebuf
)) == DATAFLASH_OK
){
147 /* if outside dataflash */
149 dataflash_perror (rc);
152 for (i
=0; i
<linebytes
; i
+= size
) {
154 printf(" %08x", *uip
++);
155 } else if (size
== 2) {
156 printf(" %04x", *usp
++);
158 printf(" %02x", *ucp
++);
163 } else { /* addr does not correspond to DataFlash */
165 for (i
=0; i
<linebytes
; i
+= size
) {
167 printf(" %08x", (*uip
++ = *((uint
*)addr
)));
168 } else if (size
== 2) {
169 printf(" %04x", (*usp
++ = *((ushort
*)addr
)));
171 printf(" %02x", (*ucp
++ = *((u_char
*)addr
)));
175 #ifdef CONFIG_HAS_DATAFLASH
180 for (i
=0; i
<linebytes
; i
++) {
181 if ((*cp
< 0x20) || (*cp
> 0x7e))
193 } while (nbytes
> 0);
196 dp_last_length
= length
;
201 int do_mem_mm ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
203 return mod_mem (cmdtp
, 1, flag
, argc
, argv
);
205 int do_mem_nm ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
207 return mod_mem (cmdtp
, 0, flag
, argc
, argv
);
210 int do_mem_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
212 ulong addr
, writeval
, count
;
215 if ((argc
< 3) || (argc
> 4)) {
216 printf ("Usage:\n%s\n", cmdtp
->usage
);
220 /* Check for size specification.
222 if ((size
= cmd_get_data_size(argv
[0], 4)) < 1)
225 /* Address is specified since argc > 1
227 addr
= simple_strtoul(argv
[1], NULL
, 16);
228 addr
+= base_address
;
230 /* Get the value to write.
232 writeval
= simple_strtoul(argv
[2], NULL
, 16);
236 count
= simple_strtoul(argv
[3], NULL
, 16);
241 while (count
-- > 0) {
243 *((ulong
*)addr
) = (ulong
)writeval
;
245 *((ushort
*)addr
) = (ushort
)writeval
;
247 *((u_char
*)addr
) = (u_char
)writeval
;
253 int do_mem_cmp (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
255 ulong addr1
, addr2
, count
, ngood
;
260 printf ("Usage:\n%s\n", cmdtp
->usage
);
264 /* Check for size specification.
266 if ((size
= cmd_get_data_size(argv
[0], 4)) < 0)
269 addr1
= simple_strtoul(argv
[1], NULL
, 16);
270 addr1
+= base_address
;
272 addr2
= simple_strtoul(argv
[2], NULL
, 16);
273 addr2
+= base_address
;
275 count
= simple_strtoul(argv
[3], NULL
, 16);
277 #ifdef CONFIG_HAS_DATAFLASH
278 if (addr_dataflash(addr1
) | addr_dataflash(addr2
)){
279 printf("Comparison with DataFlash space not supported.\n\r");
286 while (count
-- > 0) {
288 ulong word1
= *(ulong
*)addr1
;
289 ulong word2
= *(ulong
*)addr2
;
290 if (word1
!= word2
) {
291 printf("word at 0x%08lx (0x%08lx) "
292 "!= word at 0x%08lx (0x%08lx)\n",
293 addr1
, word1
, addr2
, word2
);
298 else if (size
== 2) {
299 ushort hword1
= *(ushort
*)addr1
;
300 ushort hword2
= *(ushort
*)addr2
;
301 if (hword1
!= hword2
) {
302 printf("halfword at 0x%08lx (0x%04x) "
303 "!= halfword at 0x%08lx (0x%04x)\n",
304 addr1
, hword1
, addr2
, hword2
);
310 u_char byte1
= *(u_char
*)addr1
;
311 u_char byte2
= *(u_char
*)addr2
;
312 if (byte1
!= byte2
) {
313 printf("byte at 0x%08lx (0x%02x) "
314 "!= byte at 0x%08lx (0x%02x)\n",
315 addr1
, byte1
, addr2
, byte2
);
325 printf("Total of %ld %s%s were the same\n",
326 ngood
, size
== 4 ? "word" : size
== 2 ? "halfword" : "byte",
327 ngood
== 1 ? "" : "s");
331 int do_mem_cp ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
333 ulong addr
, dest
, count
;
337 printf ("Usage:\n%s\n", cmdtp
->usage
);
341 /* Check for size specification.
343 if ((size
= cmd_get_data_size(argv
[0], 4)) < 0)
346 addr
= simple_strtoul(argv
[1], NULL
, 16);
347 addr
+= base_address
;
349 dest
= simple_strtoul(argv
[2], NULL
, 16);
350 dest
+= base_address
;
352 count
= simple_strtoul(argv
[3], NULL
, 16);
355 puts ("Zero length ???\n");
360 /* check if we are copying to Flash */
361 if ( (addr2info(dest
) != NULL
)
362 #ifdef CONFIG_HAS_DATAFLASH
363 && (!addr_dataflash(addr
))
368 printf ("Copy to Flash... ");
370 rc
= flash_write ((uchar
*)addr
, dest
, count
*size
);
380 #if (CONFIG_COMMANDS & CFG_CMD_MMC)
381 if (mmc2info(dest
)) {
384 printf ("Copy to MMC... ");
385 switch (rc
= mmc_write ((uchar
*)addr
, dest
, count
*size
)) {
393 printf ("%s[%d] FIXME: rc=%d\n",__FILE__
,__LINE__
,rc
);
400 if (mmc2info(addr
)) {
403 printf ("Copy from MMC... ");
404 switch (rc
= mmc_read (addr
, (uchar
*)dest
, count
*size
)) {
412 printf ("%s[%d] FIXME: rc=%d\n",__FILE__
,__LINE__
,rc
);
420 #ifdef CONFIG_HAS_DATAFLASH
421 /* Check if we are copying from RAM or Flash to DataFlash */
422 if (addr_dataflash(dest
) && !addr_dataflash(addr
)){
425 printf ("Copy to DataFlash... ");
427 rc
= write_dataflash (dest
, addr
, count
*size
);
430 dataflash_perror (rc
);
437 /* Check if we are copying from DataFlash to RAM */
438 if (addr_dataflash(addr
) && !addr_dataflash(dest
) && (addr2info(dest
)==NULL
) ){
440 rc
= read_dataflash(addr
, count
* size
, (char *) dest
);
442 dataflash_perror (rc
);
448 if (addr_dataflash(addr
) && addr_dataflash(dest
)){
449 printf("Unsupported combination of source/destination.\n\r");
454 while (count
-- > 0) {
456 *((ulong
*)dest
) = *((ulong
*)addr
);
458 *((ushort
*)dest
) = *((ushort
*)addr
);
460 *((u_char
*)dest
) = *((u_char
*)addr
);
467 int do_mem_base (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
470 /* Set new base address.
472 base_address
= simple_strtoul(argv
[1], NULL
, 16);
474 /* Print the current base address.
476 printf("Base Address: 0x%08lx\n", base_address
);
480 int do_mem_loop (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
482 ulong addr
, length
, i
, junk
;
484 volatile uint
*longp
;
485 volatile ushort
*shortp
;
489 printf ("Usage:\n%s\n", cmdtp
->usage
);
493 /* Check for a size spefication.
494 * Defaults to long if no or incorrect specification.
496 if ((size
= cmd_get_data_size(argv
[0], 4)) < 0)
499 /* Address is always specified.
501 addr
= simple_strtoul(argv
[1], NULL
, 16);
503 /* Length is the number of objects, not number of bytes.
505 length
= simple_strtoul(argv
[2], NULL
, 16);
507 /* We want to optimize the loops to run as fast as possible.
508 * If we have only one object, just run infinite loops.
512 longp
= (uint
*)addr
;
517 shortp
= (ushort
*)addr
;
528 longp
= (uint
*)addr
;
536 shortp
= (ushort
*)addr
;
551 * Perform a memory test. A more complete alternative test can be
552 * configured using CFG_ALT_MEMTEST. The complete test loops until
553 * interrupted by ctrl-c or by a failure of one of the sub-tests.
555 int do_mem_mtest (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
557 vu_long
*addr
, *start
, *end
;
561 #if defined(CFG_ALT_MEMTEST)
567 vu_long anti_pattern
;
569 #if defined(CFG_MEMTEST_SCRATCH)
570 vu_long
*dummy
= (vu_long
*)CFG_MEMTEST_SCRATCH
;
572 vu_long
*dummy
= NULL
;
577 static const ulong bitpattern
[] = {
578 0x00000001, /* single bit */
579 0x00000003, /* two adjacent bits */
580 0x00000007, /* three adjacent bits */
581 0x0000000F, /* four adjacent bits */
582 0x00000005, /* two non-adjacent bits */
583 0x00000015, /* three non-adjacent bits */
584 0x00000055, /* four non-adjacent bits */
585 0xaaaaaaaa, /* alternating 1/0 */
594 start
= (ulong
*)simple_strtoul(argv
[1], NULL
, 16);
596 start
= (ulong
*)CFG_MEMTEST_START
;
600 end
= (ulong
*)simple_strtoul(argv
[2], NULL
, 16);
602 end
= (ulong
*)(CFG_MEMTEST_END
);
606 pattern
= (ulong
)simple_strtoul(argv
[3], NULL
, 16);
611 #if defined(CFG_ALT_MEMTEST)
612 printf ("Testing %08x ... %08x:\n", (uint
)start
, (uint
)end
);
613 PRINTF("%s:%d: start 0x%p end 0x%p\n",
614 __FUNCTION__
, __LINE__
, start
, end
);
622 printf("Iteration: %6d\r", iterations
);
623 PRINTF("Iteration: %6d\n", iterations
);
627 * Data line test: write a pattern to the first
628 * location, write the 1's complement to a 'parking'
629 * address (changes the state of the data bus so a
630 * floating bus doen't give a false OK), and then
631 * read the value back. Note that we read it back
632 * into a variable because the next time we read it,
633 * it might be right (been there, tough to explain to
634 * the quality guys why it prints a failure when the
635 * "is" and "should be" are obviously the same in the
638 * Rather than exhaustively testing, we test some
639 * patterns by shifting '1' bits through a field of
640 * '0's and '0' bits through a field of '1's (i.e.
641 * pattern and ~pattern).
644 for (j
= 0; j
< sizeof(bitpattern
)/sizeof(bitpattern
[0]); j
++) {
646 for(; val
!= 0; val
<<= 1) {
648 *dummy
= ~val
; /* clear the test data off of the bus */
650 if(readback
!= val
) {
651 printf ("FAILURE (data line): "
652 "expected %08lx, actual %08lx\n",
658 if(readback
!= ~val
) {
659 printf ("FAILURE (data line): "
660 "Is %08lx, should be %08lx\n",
667 * Based on code whose Original Author and Copyright
668 * information follows: Copyright (c) 1998 by Michael
669 * Barr. This software is placed into the public
670 * domain and may be used for any purpose. However,
671 * this notice must not be changed or removed and no
672 * warranty is either expressed or implied by its
673 * publication or distribution.
679 * Description: Test the address bus wiring in a
680 * memory region by performing a walking
681 * 1's test on the relevant bits of the
682 * address and checking for aliasing.
683 * This test will find single-bit
684 * address failures such as stuck -high,
685 * stuck-low, and shorted pins. The base
686 * address and size of the region are
687 * selected by the caller.
689 * Notes: For best results, the selected base
690 * address should have enough LSB 0's to
691 * guarantee single address bit changes.
692 * For example, to test a 64-Kbyte
693 * region, select a base address on a
694 * 64-Kbyte boundary. Also, select the
695 * region size as a power-of-two if at
698 * Returns: 0 if the test succeeds, 1 if the test fails.
700 * ## NOTE ## Be sure to specify start and end
701 * addresses such that addr_mask has
702 * lots of bits set. For example an
703 * address range of 01000000 02000000 is
704 * bad while a range of 01000000
705 * 01ffffff is perfect.
707 addr_mask
= ((ulong
)end
- (ulong
)start
)/sizeof(vu_long
);
708 pattern
= (vu_long
) 0xaaaaaaaa;
709 anti_pattern
= (vu_long
) 0x55555555;
711 PRINTF("%s:%d: addr mask = 0x%.8lx\n",
712 __FUNCTION__
, __LINE__
,
715 * Write the default pattern at each of the
716 * power-of-two offsets.
718 for (offset
= 1; (offset
& addr_mask
) != 0; offset
<<= 1) {
719 start
[offset
] = pattern
;
723 * Check for address bits stuck high.
726 start
[test_offset
] = anti_pattern
;
728 for (offset
= 1; (offset
& addr_mask
) != 0; offset
<<= 1) {
729 temp
= start
[offset
];
730 if (temp
!= pattern
) {
731 printf ("\nFAILURE: Address bit stuck high @ 0x%.8lx:"
732 " expected 0x%.8lx, actual 0x%.8lx\n",
733 (ulong
)&start
[offset
], pattern
, temp
);
737 start
[test_offset
] = pattern
;
740 * Check for addr bits stuck low or shorted.
742 for (test_offset
= 1; (test_offset
& addr_mask
) != 0; test_offset
<<= 1) {
743 start
[test_offset
] = anti_pattern
;
745 for (offset
= 1; (offset
& addr_mask
) != 0; offset
<<= 1) {
746 temp
= start
[offset
];
747 if ((temp
!= pattern
) && (offset
!= test_offset
)) {
748 printf ("\nFAILURE: Address bit stuck low or shorted @"
749 " 0x%.8lx: expected 0x%.8lx, actual 0x%.8lx\n",
750 (ulong
)&start
[offset
], pattern
, temp
);
754 start
[test_offset
] = pattern
;
758 * Description: Test the integrity of a physical
759 * memory device by performing an
760 * increment/decrement test over the
761 * entire region. In the process every
762 * storage bit in the device is tested
763 * as a zero and a one. The base address
764 * and the size of the region are
765 * selected by the caller.
767 * Returns: 0 if the test succeeds, 1 if the test fails.
769 num_words
= ((ulong
)end
- (ulong
)start
)/sizeof(vu_long
) + 1;
772 * Fill memory with a known pattern.
774 for (pattern
= 1, offset
= 0; offset
< num_words
; pattern
++, offset
++) {
775 start
[offset
] = pattern
;
779 * Check each location and invert it for the second pass.
781 for (pattern
= 1, offset
= 0; offset
< num_words
; pattern
++, offset
++) {
782 temp
= start
[offset
];
783 if (temp
!= pattern
) {
784 printf ("\nFAILURE (read/write) @ 0x%.8lx:"
785 " expected 0x%.8lx, actual 0x%.8lx)\n",
786 (ulong
)&start
[offset
], pattern
, temp
);
790 anti_pattern
= ~pattern
;
791 start
[offset
] = anti_pattern
;
795 * Check each location for the inverted pattern and zero it.
797 for (pattern
= 1, offset
= 0; offset
< num_words
; pattern
++, offset
++) {
798 anti_pattern
= ~pattern
;
799 temp
= start
[offset
];
800 if (temp
!= anti_pattern
) {
801 printf ("\nFAILURE (read/write): @ 0x%.8lx:"
802 " expected 0x%.8lx, actual 0x%.8lx)\n",
803 (ulong
)&start
[offset
], anti_pattern
, temp
);
810 #else /* The original, quickie test */
818 printf ("\rPattern %08lX Writing..."
820 "\b\b\b\b\b\b\b\b\b\b",
823 for (addr
=start
,val
=pattern
; addr
<end
; addr
++) {
828 printf("Reading...");
830 for (addr
=start
,val
=pattern
; addr
<end
; addr
++) {
832 if (readback
!= val
) {
833 printf ("\nMem error @ 0x%08X: "
834 "found %08lX, expected %08lX\n",
835 (uint
)addr
, readback
, val
);
842 * Flip the pattern each time to make lots of zeros and
843 * then, the next time, lots of ones. We decrement
844 * the "negative" patterns and increment the "positive"
845 * patterns to preserve this feature.
847 if(pattern
& 0x80000000) {
848 pattern
= -pattern
; /* complement & increment */
863 * mm{.b, .w, .l} {addr}
864 * nm{.b, .w, .l} {addr}
867 mod_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char *argv
[])
871 extern char console_buffer
[];
874 printf ("Usage:\n%s\n", cmdtp
->usage
);
878 #ifdef CONFIG_BOOT_RETRY_TIME
879 reset_cmd_timeout(); /* got a good command to get here */
881 /* We use the last specified parameters, unless new ones are
887 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
888 /* New command specified. Check for a size specification.
889 * Defaults to long if no or incorrect specification.
891 if ((size
= cmd_get_data_size(argv
[0], 4)) < 0)
894 /* Address is specified since argc > 1
896 addr
= simple_strtoul(argv
[1], NULL
, 16);
897 addr
+= base_address
;
900 #ifdef CONFIG_HAS_DATAFLASH
901 if (addr_dataflash(addr
)){
902 printf("Can't modify DataFlash in place. Use cp instead.\n\r");
907 /* Print the address, followed by value. Then accept input for
908 * the next value. A non-converted value exits.
911 printf("%08lx:", addr
);
913 printf(" %08x", *((uint
*)addr
));
915 printf(" %04x", *((ushort
*)addr
));
917 printf(" %02x", *((u_char
*)addr
));
919 nbytes
= readline (" ? ");
920 if (nbytes
== 0 || (nbytes
== 1 && console_buffer
[0] == '-')) {
921 /* <CR> pressed as only input, don't modify current
922 * location and move to next. "-" pressed will go back.
925 addr
+= nbytes
? -size
: size
;
927 #ifdef CONFIG_BOOT_RETRY_TIME
928 reset_cmd_timeout(); /* good enough to not time out */
931 #ifdef CONFIG_BOOT_RETRY_TIME
932 else if (nbytes
== -2) {
933 break; /* timed out, exit the command */
938 i
= simple_strtoul(console_buffer
, &endp
, 16);
939 nbytes
= endp
- console_buffer
;
941 #ifdef CONFIG_BOOT_RETRY_TIME
942 /* good enough to not time out
949 *((ushort
*)addr
) = i
;
951 *((u_char
*)addr
) = i
;
963 int do_mem_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
970 printf ("Usage:\n%s\n", cmdtp
->usage
);
974 addr
= simple_strtoul (argv
[1], NULL
, 16);
975 addr
+= base_address
;
977 length
= simple_strtoul (argv
[2], NULL
, 16);
979 crc
= crc32 (0, (const uchar
*) addr
, length
);
981 printf ("CRC32 for %08lx ... %08lx ==> %08lx\n",
982 addr
, addr
+ length
- 1, crc
);
985 ptr
= (ulong
*) simple_strtoul (argv
[3], NULL
, 16);
992 /**************************************************/
993 #if (CONFIG_COMMANDS & CFG_CMD_MEMORY)
996 "md - memory display\n",
997 "[.b, .w, .l] address [# of objects]\n - memory display\n"
1002 mm
, 2, 1, do_mem_mm
,
1003 "mm - memory modify (auto-incrementing)\n",
1004 "[.b, .w, .l] address\n" " - memory modify, auto increment address\n"
1009 nm
, 2, 1, do_mem_nm
,
1010 "nm - memory modify (constant address)\n",
1011 "[.b, .w, .l] address\n - memory modify, read and keep address\n"
1015 mw
, 4, 1, do_mem_mw
,
1016 "mw - memory write (fill)\n",
1017 "[.b, .w, .l] address value [count]\n - write memory\n"
1021 cp
, 4, 1, do_mem_cp
,
1022 "cp - memory copy\n",
1023 "[.b, .w, .l] source target count\n - copy memory\n"
1027 cmp
, 4, 1, do_mem_cmp
,
1028 "cmp - memory compare\n",
1029 "[.b, .w, .l] addr1 addr2 count\n - compare memory\n"
1033 crc32
, 4, 1, do_mem_crc
,
1034 "crc32 - checksum calculation\n",
1035 "address count [addr]\n - compute CRC32 checksum [save at addr]\n"
1039 base
, 2, 1, do_mem_base
,
1040 "base - print or set address offset\n",
1041 "\n - print address offset for memory commands\n"
1042 "base off\n - set address offset for memory commands to 'off'\n"
1046 loop
, 3, 1, do_mem_loop
,
1047 "loop - infinite loop on address range\n",
1048 "[.b, .w, .l] address number_of_objects\n"
1049 " - loop on a set of addresses\n"
1053 mtest
, 4, 1, do_mem_mtest
,
1054 "mtest - simple RAM test\n",
1055 "[start [end [pattern]]]\n"
1056 " - simple RAM read/write test\n"
1060 #endif /* CFG_CMD_MEMORY */