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3 Commits (59d065c9ac6e5476a21fb9b277f719fd4ae5b372)

Author SHA1 Message Date
Michael Brown d3c8944d5c [acpi] Expose system MAC address via ${sysmac} setting 
Expose the system MAC address (if any) via the ${sysmac} setting.
This allows scripts to access the system MAC address even when iPXE
has decided not to apply it to a network device (e.g. because the
cached DHCPACK MAC address was selected in order to match the
behaviour of a previous boot stage).

The setting is named ${sysmac} rather than ${acpimac} in order to
allow for forward compatibility with non-ACPI mechanisms that may
exist in future for specifying a system MAC address.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2022-06-10 13:44:40 +01:00
Michael Brown f58b5109f4 [acpi] Support the "_RTXMAC_" format for ACPI-based MAC addresses 
Some newer HP products expose the host-based MAC (HBMAC) address using
an ACPI method named "RTMA" returning a part-binary string of the form
"_RTXMAC_#<mac>#", where "<mac>" comprises the raw MAC address bytes.

Extend the existing support to handle this format alongside the older
"_AUXMAC_" format (which uses a base16-encoded MAC address).

Reported-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Tested-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2022-03-25 16:47:06 +00:00
Michael Brown 0cc4c42f0a [acpi] Allow for extraction of a MAC address from the DSDT/SSDT 
Some vendors provide a "system MAC address" within the DSDT/SSDT, to
be used to override the MAC address for a USB docking station.

A full implementation would require an ACPI bytecode interpreter,
since at least one OEM allows the MAC address to be constructed by
executable ACPI bytecode (rather than a fixed data structure).

We instead attempt to extract a plausible-looking "_AUXMAC_#.....#"
string that appears shortly after an "AMAC" or "MACA" signature.  This
should work for most implementations encountered in practice.

Debugged-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2021-09-09 12:18:00 +01:00