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Diffstat (limited to 'docs/install/r400_external.md')
| -rw-r--r-- | docs/install/r400_external.md | 44 |
1 files changed, 31 insertions, 13 deletions
diff --git a/docs/install/r400_external.md b/docs/install/r400_external.md index c0c50d80..80e1a676 100644 --- a/docs/install/r400_external.md +++ b/docs/install/r400_external.md @@ -62,6 +62,7 @@ Flash chip size {#flashchips} =============== Use this to find out: + # flashrom -p internal -V MAC address {#macaddress} @@ -214,7 +215,9 @@ Log in as root on your BBB, using the instructions in [bbb\_setup.html\#bbb\_access](bbb_setup.html#bbb_access). Test that flashrom works: - # ./flashrom -p linux\_spi:dev=/dev/spidev1.0,spispeed=512\ + + # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512\ + In this case, the output was: flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l) @@ -227,19 +230,27 @@ In this case, the output was: Please specify which chip definition to use with the -c <chipname> option. How to backup factory.rom (change the -c option as neeed, for your flash -chip):\ -\# **./flashrom -p linux\_spi:dev=/dev/spidev1.0,spispeed=512 -r -factory.rom**\ -\# **./flashrom -p linux\_spi:dev=/dev/spidev1.0,spispeed=512 -r -factory1.rom**\ -\# **./flashrom -p linux\_spi:dev=/dev/spidev1.0,spispeed=512 -r -factory2.rom**\ +chip): + + # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r + +factory.rom + + # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r + +factory1.rom + + # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r + +factory2.rom + Note: the **-c** option is not required in libreboot's patched flashrom, because the redundant flash chip definitions in *flashchips.c* have been removed.\ Now compare the 3 images: # sha512sum factory\*.rom + If the hashes match, then just copy one of them (the factory.rom) to a safe place (on a drive connected to another system, not the BBB). This is useful for reverse engineering work, if there is a desirable @@ -253,13 +264,15 @@ flashing it. Although there is a default MAC address inside the ROM image, this is not what you want. **Make sure to always change the MAC address to one that is correct for your system.** -Now flash it:\ -\# **./flashrom -p linux\_spi:dev=/dev/spidev1.0,spispeed=512 -w -path/to/libreboot/rom/image.rom -V** +Now flash it: + + # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -w + +path/to/libreboot/rom/image.rom -V  -You might see errors, but if it says **Verifying flash\... VERIFIED** at +You might see errors, but if it says **Verifying flash... VERIFIED** at the end, then it's flashed and should boot. If you see errors, try again (and again, and again); the message **Chip content is identical to the requested image** is also an indication of a successful @@ -351,4 +364,9 @@ You should see something like this: Now [install GNU+Linux](../gnulinux/). Copyright © 2014, 2015 Leah Rowe <info@minifree.org>\ -This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt) + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License Version 1.3 or any later +version published by the Free Software Foundation +with no Invariant Sections, no Front Cover Texts, and no Back Cover Texts. +A copy of this license is found in [../fdl-1.3.md](../fdl-1.3.md) |