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n (and duplicate) property names and offsets into yet another struct that carries the collected data. Since we know the data we look for is either under /hypervisor/uefi or under /chosen, it is much simpler to use the libfdt routines, and just try to grab a reference to either node directly, and read each property in sequence. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> 2020-02-23efi/arm: Move FDT specific definitions into fdtparams.cArd Biesheuvel Push the FDT params specific types and definition into fdtparams.c, and instead, pass a reference to the memory map data structure and populate it directly, and return the system table address as the return value. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> 2020-02-23efi/arm: Move FDT param discovery code out of efi.cArd Biesheuvel On ARM systems, we discover the UEFI system table address and memory map address from the /chosen node in the device tree, or in the Xen case, from a similar node under /hypervisor. Before making some functional changes to that code, move it into its own file that only gets built if CONFIG_EFI_PARAMS_FROM_FDT=y. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>