Artesyn COMX-P40x0 ENP2 Installation and Use (January 2015) - Manual (Page 109)

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COMX-P40x0 ENP2 Installation and Use (6806800R95C) 109
7.13 NOR Flash
The NOR Flash is Numonyx™ Axcell™ JS28F00AM29EWL or Spansion S29GL01GP11TFIR2 and
is attached to the GPCM on local bus and works with 16-bit data width. It is either 1 GB or 128
MB and has 1024 uniform blocks of 128 K (or 64 K words each). The 36-bit physical address of
NOR Flash is 0xFE8000000 - 0xFEFFFFFFF. Boot up message in U-Boot is "FLASH: 128 MiB".
NOR Flash supports the following commands: md, cp, cmp, protect and erase.
The following is a NOR Flash operation example that upgrades the U-Boot.
tftpboot $loadaddr $ubootfile; protect off 0xeff00000 +$filesize;
erase 0xeff00000 +$filesize; cp.b $loadaddr 0xeff00000 $filesize;
protect on 0xeff00000 +$filesize;
Table 7-6 NOR Flash Command Usage
Command Description
protect on start end Protects flash from address "start" to address "end"
protect on start +len Protects flash from address "start" to end of section with address
"start"+"len"-1
protect on all Protects all flash banks
protect off start end Makes flash from address "start" to address "end" writable
protect off start +len Makes flash from address "start" to end of section with address
"start"+"len"-1 writable
protect off all Makes all flash banks writable
erase start end Erases flash from address ’start’ to address ’end’
erase start +len Erases flash from address ’start’ to the end of section with address
’start’+len-1
erase all Erases all flash banks