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| author | Michael Brown | 2021-09-08 14:50:20 +0200 |
|---|---|---|
| committer | Michael Brown | 2021-09-09 13:18:00 +0200 |
| commit | 0cc4c42f0af716bc5a363ad699160926e91a4d35 (patch) | |
| tree | 9493e4661b5124f4fb330d35a72cd937906fd2be /src/include | |
| parent | [acpi] Generalise DSDT/SSDT data extraction logic (diff) | |
| download | ipxe-0cc4c42f0af716bc5a363ad699160926e91a4d35.tar.gz ipxe-0cc4c42f0af716bc5a363ad699160926e91a4d35.tar.xz ipxe-0cc4c42f0af716bc5a363ad699160926e91a4d35.zip | |
[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>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/acpimac.h | 14 | ||||
| -rw-r--r-- | src/include/ipxe/errfile.h | 1 |
2 files changed, 15 insertions, 0 deletions
diff --git a/src/include/ipxe/acpimac.h b/src/include/ipxe/acpimac.h new file mode 100644 index 000000000..de673eb28 --- /dev/null +++ b/src/include/ipxe/acpimac.h @@ -0,0 +1,14 @@ +#ifndef _IPXE_ACPIMAC_H +#define _IPXE_ACPIMAC_H + +/** @file + * + * ACPI MAC address + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +extern int acpi_mac ( uint8_t *hw_addr ); + +#endif /* _IPXE_ACPIMAC_H */ diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index cf5757874..23e406b62 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -77,6 +77,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #define ERRFILE_fdt ( ERRFILE_CORE | 0x00250000 ) #define ERRFILE_dma ( ERRFILE_CORE | 0x00260000 ) #define ERRFILE_cachedhcp ( ERRFILE_CORE | 0x00270000 ) +#define ERRFILE_acpimac ( ERRFILE_CORE | 0x00280000 ) #define ERRFILE_eisa ( ERRFILE_DRIVER | 0x00000000 ) #define ERRFILE_isa ( ERRFILE_DRIVER | 0x00010000 ) |