[U-Boot] md,mw commands

Tue Mar 6 10:41:05 CET 2012

Hi,

    Iam  using 256MB RAM on arm11 board.I just tried md,mw commands from
uboot like the following

mw C800000 0xbbbbbbbb 0x500       here C800000 is the 200MB of RAM

MCS8142>> md C800000
0c800000: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800010: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800020: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800030: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800040: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800050: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800060: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800070: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800080: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c800090: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c8000a0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c8000b0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c8000c0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c8000d0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c8000e0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................
0c8000f0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb    ................

mw  32000000 0xffffffff  0x500  here 32000000 is the 800MB of RAM

MCS8142>> md 32000000
32000000: ffffffff ffffffff ffffffff ffffffff    ................
32000010: ffffffff ffffffff ffffffff ffffffff    ................
32000020: ffffffff ffffffff ffffffff ffffffff    ................
32000030: ffffffff ffffffff ffffffff ffffffff    ................
32000040: ffffffff ffffffff ffffffff ffffffff    ................
32000050: ffffffff ffffffff ffffffff ffffffff    ................
32000060: ffffffff ffffffff ffffffff ffffffff    ................
32000070: ffffffff ffffffff ffffffff ffffffff    ................

How it is possible to see the data even after the 256MB of RAM.If i give
the sizes like 256MB ,512MB mw command get hangs otherwise the data is
writing to the RAM even the size exceeds the size of actual RAM. Please
help me.

Thanks
V.Balaji