The firmware for WoA is based on the UEFI specification, which has and exposes the ACPI tables. The firmware is separate from the operating systems, but the hardware information is loaded into the registry just like x86
How Windows on ARM discovers the underlying hardware?
Emerson Cardoso
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I know that, for x86 and x64 processors, Windows relies on ACPI to auto-discover the hardware.
However, for smaller systems (notably ARM architectures), a device tree file needs to be passed to the operating system.
Does Windows on ARM also require such a file, for ARM platforms? (i.e. a system on chip).
If yes, is this file embedded with the OS, or stored in the firmware?
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Doron Holan 1,801 Reputation points
2021-03-16T16:41:38.29+00:00 Device tree is a linux specific solution. WoA requires ACPI.