Yeah, you can use the field at 4F (9E). If it is 2 it is bottom boot. If it is 3 it is top boot. See page 27, Table 4-4 CFI Mode: Primary Vendor-Specific Extended Querry Data Values in the data sheet. Thanks Yogi

----- Original Message ---- From: Timur Tabi timur@freescale.com To: Tolunay Orkun listmember@orkun.us Cc: u-boot-users@lists.sourceforge.net; Stefan Roese sr@denx.de Sent: Wednesday, November 1, 2006 9:52:44 AM Subject: Re: [U-Boot-Users] Sector size with CFI driver?

Tolunay Orkun wrote:

Secondly, it looks like the erase region list returned is reversed for this flash chip. I think, CFG_CFI_GEOMETRY_REVERSED would be more appropriate.

I like that one better.

Perhaps you can identify such a reserved list from the CFI tables on the flash. If this can be done no macros would be needed to handle this case.

Can you tell me the exact part number for your flash. I would like to read the data sheet and compare its CFI structures if I can.

29LV640BTTC-90G

You can find the specs here by going to http://www.macronix.com, clicking on "Flash Memory", and then scrolling to the bottom for this entry:

MX29LV640B T/B 3V x8/x16 Boot sector 90/120 48-TSOP, 63-CSP

I'm using the 48-pin version.