init: Add option to copy base read-only filesystem into RAM

If copy-base-filesystem-to-ram is found copy the read-only
filesystem source device to /run/image-rofs.  If the copy fails
then remove the partial copy and invoke debug takeover.

This will allow a new image to be downloaded and flashed while
running from the existing copy for the duration of this boot.

Alternatively with the overlay also in RAM pflash could be used
to update the flash from the host as the BMC would no longer need
the flash or flash controller.

Signed-off-by: Milton Miller <miltonm@us.ibm.com>
1 file changed
tree: 4941e1eb5bad31b80a2374564f611a540b04c99c
  1. meta-openbmc-bsp/
  2. meta-openbmc-machines/
  3. meta-phosphor/
  4. yocto-poky/
  5. .gitignore
  6. .templateconf
  7. openbmc-env
  8. README.md
README.md

OpenBMC

Build Status

Building

OpenBMC uses Yocto/Open-Embedded for a build system, which supports an out-of-tree build. It is recommended that you create an empty directory somewhere to hold the build. This directory will get big.

On Ubuntu 14.04 the following packages are required to build the default target

sudo apt-get install -y git build-essential libsdl1.2-dev texinfo gawk chrpath diffstat

On Fedora 23 the following packages are required to build the default target:

sudo dnf install -y git patch diffstat texinfo chrpath SDL-devel bitbake
sudo dnf groupinstall "C Development Tools and Libraries"

To start a build:

cd <builddir>
. <repodir>/openbmc-env
bitbake obmc-phosphor-image