Hi Stefan. I am now attempting to write to a flashrom using the layout/region approach. I need to write a region from a 4MB ROM to the beginning of an 8MB ROM. The region image from the 4MB ROM is 4,128,768 bytes == 0x3f0000 long and this file is called image1. I have defined the 8MB ROM layout in file called romlayout_8MB to be:
000000:3effff main 3f0000:7fffff remainder i.e I want to place the contents of file image1 in to the 8MB ROM region defined as main. I invoked flashrom as follows: flashrom -p buspirate_spi:dev=/dev/ttyUSB0,spispeed=250k -l romlayout_8MB -i main -w image1 The flash ROM is detected correctly, delay calculated, but then flashrom immediately returns the error: "image size doesn't match". As always, guidance/suggestions gratefully received. On Wed, Feb 6, 2013 at 4:29 AM, Stefan Tauner < [email protected]> wrote: > On Tue, 5 Feb 2013 14:06:21 -0800 > John Gainsborough <[email protected]> wrote: > > > With BusPirate (v3a, firmware 5.10) and flashrom (v0.9.5.2, little > endian) > > I am attempting to read a region of the flash ROM defined by a ROM layout > > file as in: > > > > flashrom -p buspirate_spi:dev=/dev/ > > ttyUSB0,spispeed=200k -l romlayout -i region1 -r read file > > > > Where file romlayout contains: > > > > 003f0000:003fffff region1 > > > > The flash ROM IC is correctly identified, and region1 is listed as being > > used, however flashrom then proceeds to read all ROM memory, not just the > > area defined by region1. > > > > I have run this procedure with flash ROMs: > > Eon EN25Q32 and EN25Q64. also Micronix MX25L6445 > > > > Eventually I plan to use this procedure for writing to a defined region. > > > > Any help/suggestions gratefully received. > > Hello John, > > sorry for the confusion. What you see is perfectly ok and expected (at > least to us, understandably not so much to the everyday user). The > reason is this: the layout and image options are only taken into account > for write operations(!) at the moment. I have created patches to use > them for all other operations too but they were not merged yet (we > really suck at merging stuff, sorry). If you can not or do not want to > extract the required data from the complete image you can take a look > at those patches: http://patchwork.coreboot.org/user/bundle/37/ > They certainly won't apply to the current HEAD, but you can either use > the old source or I can rebase them to the current one if you prefer it. > > Writing only a part should work though. > -- > Kind regards/Mit freundlichen Grüßen, Stefan Tauner >
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