README.md

ShellPlatVars

This tool is meant to be run from the UEFI Shell, and will set the shell environment variables based on SMBIOS/ACPI/FDT configuration.

For SMBIOS:

• pvar-have-smbios for SMBIOS < 3.0.
• pvar-have-smbios64 for SMBIOS >= 3.0.
• pvar-smbios-bios-vendor for firmware vendor.
• pvar-smbios-bios-ver for firmware version.
• pvar-smbios-bios-data for firmware release data.
• pvar-smbios-manufacturer for system manufacturer.
• pvar-smbios-product for product name.
• pvar-smbios-product-ver for product version.
• pvar-smbios-product-sn for product serial number.
• pvar-smbios-product-family for product family.

For ACPI:

• pvar-have-acpi for ACPI presence.
• pvar-acpi-<OemId> = True
• pvar-acpi-<OemTableId> = True
• pvar-acpi-<Signature>-rev = <Revision>
• pvar-acpi-<Signature>-oem-id = <OemId>
• pvar-acpi-<Signature>-oem-rev = <OemRevision>
• pvar-acpi-<Signature>-tab-id = <OemTableId>

Note: <OemId> and <OemTableId> are sanitized, replacing all occurances of with _.

For FDT (not available on IA32, X64, IPF and EBC):

• pvar-have-fdt for FDT presence.
• pvar-fdt-compat-0 = <root node compatible element 0>
• ...
• pvar-fdt-compat-9 = <root node compatible element 9>

Usage:

fs16:> ShellPlatVars.efi
fs16:> set
    path = .\;FS0:\efi\tools\;FS0:\efi\boot\;FS0:\
    profiles = ;Driver1;Install;Debug1;network1;
    uefishellsupport = 3
    uefishellversion = 2.0
    uefiversion = 2.40
    pvar-have-smbios = False
    pvar-have-smbios64 = False
    pvar-have-acpi = False
    pvar-have-fdt = False

This is meant to be used from a shell script. E.g.:

if x%pvar-have-fdt% eq xTrue then
    echo I am running on a %pvar-fdt-compat-0%
endif

if x%pvar-have-acpi% eq xFalse then
    AcpiLoader MyFunkySystem
endif

if x%pvar-acpi-DSDT-tab-id% eq xPOWER_NV then
    load fs16:\PowerNV\IODA2HostBridge.efi
endif

if x"%pvar-smbios-product-family%" eq x"Whatever This Is" then
    echo I am running on Whatever
endif