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Add paragraph documenting loader.env functionlity

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Approved by:		docs (carlavilla)
Differential Revision:	https://reviews.freebsd.org/D42476

(cherry picked from commit bce728719e)
This commit is contained in:
Guido Falsi 2023-11-06 13:11:26 +01:00 committed by Warner Losh
parent b5cd844a56
commit 25cf4c0452
1 changed files with 8 additions and 0 deletions
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8
stand/man/loader.efi.8
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@ -205,6 +205,14 @@ does not implement the probe
.Fl P
functionality where we use the video console if a keyboard is connected and a
serial console otherwise.
.Ss Additional Environment Variables
.Nm
loads some extra variables early in startup from
.Pa /efi/freebsd/loader.env
from the EFI partition. Only simple variables can be set here. It can be useful to specify the root filesystem:
.Bd -literal -offset indent
rootdev=disk0s1a
.Ed
.Ss Staging Slop
The kernel must parse the firmware memory map tables to know what memory
it can use.