[U-Boot-Users] flash issues

[Robert]

Hi all,

    I use "flinfo" to display the nand flash information under uboot prompt, 
and
find that only two sectors are ready-only, but the other sectors could be
 read-write, why could happen this? I do nothing changes in uboot and
on my development board Marvell5182.
    So I decide to re-load a new u-boot.bin to the boot flash, then reboot 
the
system, and do the same thing as before, but I find that the boot flash has 
been
changed to be read-only too, I don't know why? Could anybody tell?

Here is my print information from superterminal:
-----------------------------------------------------------------
Bank # 1: AMD AM29LV040B (4 Mbit, bottom boot sect)
Size: 512 kB,Bus Width: 1, device Width: 1.
Flash base: 0xff800000,Number of Sectors: 8 Type: REGULAR.
  Sector Start Addresses:
    00000000 (RO) 00010000 (RO) 00020000 (RO) 00030000 (RO) 00040000 (RO)
    00050000 (RO) 00060000 (RO) 00070000 (RO)

Bank # 2: INTEL 28F128J3A (128 Mbit)
Size: 16 MB,Bus Width: 2, device Width: 2.
Flash base: 0xf8000000,Number of Sectors: 128 Type: REGULAR.
  Sector Start Addresses:
    00000000      00020000 (RO) 00040000 (RO) 00060000      00080000
    000a0000      000c0000      000e0000      00100000      00120000
    00140000      00160000      00180000      001a0000      001c0000
    001e0000      00200000      00220000      00240000      00260000
    00280000      002a0000      002c0000      002e0000      00300000
    00320000      00340000      00360000      00380000      003a0000
    003c0000      003e0000      00400000      00420000      00440000
    00460000      00480000      004a0000      004c0000      004e0000
    00500000      00520000      00540000      00560000      00580000
    005a0000      005c0000      005e0000      00600000      00620000
    00640000      00660000      00680000      006a0000      006c0000
    006e0000      00700000      00720000      00740000      00760000
    00780000      007a0000      007c0000      007e0000      00800000
    00820000      00840000      00860000      00880000      008a0000
    008c0000      008e0000      00900000      00920000      00940000
    00960000      00980000      009a0000      009c0000      009e0000
    00a00000      00a20000      00a40000      00a60000      00a80000
    00aa0000      00ac0000      00ae0000      00b00000      00b20000
    00b40000      00b60000      00b80000      00ba0000      00bc0000
    00be0000      00c00000      00c20000      00c40000      00c60000
    00c80000      00ca0000      00cc0000      00ce0000      00d00000
    00d20000      00d40000      00d60000      00d80000      00da0000
    00dc0000      00de0000      00e00000      00e20000      00e40000
    00e60000      00e80000      00ea0000      00ec0000      00ee0000
    00f00000      00f20000      00f40000      00f60000      00f80000
--------------------------
With kind regards,
Robert