Hello David, Thanks for commands usage .
For the command: dd if=test2.bin of=test.bin bs=1 seek=$((0x1a1e0)) conv=notrunc It is subtle when you are mentioning bs=1, If we donot specify bs, it will take a default value of 512 I suppose, then seek will be (0x1a1e0)*512 which will skip lot of bytes from the beginning of the file. So, we cannot use a layout file to write to a specific region. Rgds, On Tue, Aug 2, 2016 at 1:31 AM, David Hendricks <dhend...@chromium.org> wrote: > > > On Mon, Aug 1, 2016 at 9:59 AM, Pradeep Ch <shanm...@sysargus.com> wrote: > >> How do I pad the bootloader. img to 8MBytes ? But, still it occupies the >> first 106976 Bytes right ? Remaining space is empty I suppose. >> > To create a 8MB file full of 0xff bytes: > dd if=/dev/zero bs=1k count=8192 2>/dev/null | tr "\000" "\377" > test.bin > > From there, you can use dd with skip=, seek=, and conv=notrunc to place > your content wherever you need to in the image. For example, > dd if=test1.bin of=test.bin bs=1 conv=notrunc > dd if=test2.bin of=test.bin bs=1 seek=$((0x1a1e0)) conv=notrunc > > Thanks. >> On Aug 1, 2016 9:08 PM, "Urja Rannikko" <urja...@gmail.com> wrote: >> >>> Hi, >>> >>> On Mon, Aug 1, 2016 at 10:33 AM, Pradeep Ch <shanm...@sysargus.com> >>> wrote: >>> > >>> > I am attempting to write to a flashrom using layout/region approach. >>> > The NOR flash size is 8MBytes. The file size I am writing is 106976 >>> Bytes. >>> > >>> > The rom.layout file contents are: >>> > 00000000:0001a1df test1 >>> > 0001a1e0:007fffff test2 >>> > >>> > The command I am using is: >>> > ./flashrom -p ft2232_spi:type=arm-usb-ocd --layout rom.layout --image >>> test1 >>> > -w bootloader.img >>> > >>> > The error I am getting is : >>> > Using region: "test1". >>> > Calibrating delay loop... OK. >>> > Found Eon flash chip "EN25Q64" (8192 kB, SPI) on ft2232_spi. >>> > Error: Image size (106976 B) doesn't match the flash chip's size >>> (8388608 >>> > B)! >>> > >>> > Please let me know about the error. >>> >>> The current layout system will only limit the actually written area, >>> not change the requirements of the flash file being the size of the >>> chip, so in this case you'd need to pad the bootloader.img to 8MB. >>> >> >> _______________________________________________ >> flashrom mailing list >> flashrom@flashrom.org >> https://www.flashrom.org/mailman/listinfo/flashrom >> > > > > -- > David Hendricks (dhendrix) > Systems Software Engineer, Google Inc. >
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