[U-Boot] NOR sectors are not all protected as they should be.

Alexandre Gambier a.gambier at ftemaximal.fr
Wed Feb 9 17:02:08 CET 2011


Hello,

I'm using U-Boot with a NOR and a NAND Flash.

U-Boot is stored into the NOR flash.
The NOR flash is setup as :

0xA0000000 -> 0xA0080000 -> 512k -> 8 sectors -> reserved for U-Boot.bin
0xA0080000 -> 0xA00A0000 -> 128k -> 2 sectors -> reserved for U-Boot 
environment

If I use the command `flinfo` to see which sectors are protected I see 
this...

Sector Start Addresses:
   A0000000   RO   A0010000   RO   A0020000   RO   A0030000   RO   
A0040000 E
   A0050000 E      A0060000 E      A0070000 E      A0080000   RO   
A0090000 E RO
   A00A0000 E      A00B0000 E      A00C0000 E      A00D0000 E      
A00E0000 E
   A00F0000 E      A0100000 E      A0110000 E      A0120000 E      
A0130000 E
   A0140000 E      A0150000 E      A0160000 E      A0170000 E      
A0180000 E
   A0190000 E      A01A0000 E      A01B0000 E      A01C0000 E      
A01D0000 E
   A01E0000 E      A01F0000 E      A0200000 E      A0210000 E      
A0220000 E
   A0230000 E      A0240000 E      A0250000 E      A0260000 E      
A0270000 E
   A0280000 E      A0290000 E      A02A0000 E      A02B0000 E      
A02C0000 E
   A02D0000 E      A02E0000 E      A02F0000 E      A0300000 E      
A0310000 E
   A0320000 E      A0330000 E      A0340000 E      A0350000 E      
A0360000 E
   A0370000 E      A0380000 E      A0390000 E      A03A0000 E      
A03B0000 E
   A03C0000 E      A03D0000 E      A03E0000 E      A03F0000 E      
A0400000 E
   A0410000 E      A0420000 E      A0430000 E      A0440000 E      
A0450000 E
   A0460000 E      A0470000 E      A0480000 E      A0490000 E      
A04A0000 E
   A04B0000 E      A04C0000 E      A04D0000 E      A04E0000 E      
A04F0000 E
   A0500000 E      A0510000 E      A0520000 E      A0530000 E      
A0540000 E
   A0550000 E      A0560000 E      A0570000 E      A0580000 E      
A0590000 E
   A05A0000 E      A05B0000 E      A05C0000 E      A05D0000 E      
A05E0000 E
   A05F0000 E      A0600000 E      A0610000 E      A0620000 E      
A0630000 E
   A0640000 E      A0650000 E      A0660000 E      A0670000 E      
A0680000 E
   A0690000 E      A06A0000 E      A06B0000 E      A06C0000 E      
A06D0000 E
   A06E0000 E      A06F0000 E      A0700000 E      A0710000 E      
A0720000 E
   A0730000 E      A0740000 E      A0750000 E      A0760000 E      
A0770000 E
   A0780000 E      A0790000 E      A07A0000 E      A07B0000 E      
A07C0000 E
   A07D0000 E      A07E0000 E      A07F0000 E

The first sectors #0,1,2,3 are protected and sectors #8,9 (U-Boot 
environment) are protected.
It should be sectors #0,1,2,3,4,5,6,7 and sectors #8,9.

I had a looked into U-Boot source to find a constant that defines how 
many sectors should be protected for the monitor but I didn't find it.
I guess U-Boot protect these sectors during the boot sequence.
What constant must be defined to protect all of the sectors 
(#0,1,2,3,4,5,6,7) ?

thanks in advance.
Alex


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