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30-add-offb now performs functions other than just setting offb
information, so rename it to a more accurate '30-dtb-updates'.
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
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Commit ce54f86 "Add petitboot,tty and track available consoles" added
the petitboot,tty parameter, but the petitboot,console parameter is also
recognised by Petitboot. These are ultimately handled by the 30-add-offb
and 80-set-stdout hooks respectively, but exist for mostly the same
purpose.
We consolidate these down to just the original petitboot,console
parameter. If the contents of petitboot,console have been configured by
Petitboot (ie. it is of the form /dev/dev# [ Description ]) we behave as
normal, otherwise we assume that petitboot,console contains a full
OF path to the intended console device and do not allow it to be
modified. This follows petitboot,console's original intent to be a debug
aid, and takes precedence over any other use.
The 80-set-stdout hook is removed as 30-add-offb now accounts for both
use cases.
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
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'Console' is more readily understandable and technically more correct
than 'tty' for referring to the interfaces that Petitboot starts a UI on.
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
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If a console is defined in NVRAM, we want it to take precedence over
anything that 30-add-offb calculates automatically. This change shifts
the 20-set-stdout script to later in the hook processing, so that it
will override any automatic settings.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
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We need an absolute path to the serial@N device. It looks like some
kernels aren't reading the current path correctly, leading to no console
output.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
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If the boot_tty environment variable is set, determine which device path
to set in the linux,stdout-path property, which will instruct the next
kernel to use it as the primary console.
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
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On OpenPOWER machines, kernels missing the AST video driver can use the
existing 'Open Firmware' framebuffer device code to inherit an existing
framebuffer from Petitboot. This requires us to translate the 64-bit
address of the framebuffer 'back' into a PCI address and write it into
an assigned-addresses property in the device tree.
Bootstrapped-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Sam Mendoza-Jonas <sam@mendozajonas.com>
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The boot hooks may have altered the DTB in various ways, so add a final
(90-) boot hook to re-sort the dtb with `dtc -s`.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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On machines that use device-tree boot, they'll often set an early
console, defined by the linux,stdout property in the /chosen/ device
tree node.
This hook adds a facility for petitboot to set this, based on an NVRAM
setting.
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Provide an example for writing a pre-boot hook to update the dtb.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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