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Commit 4d5e0b15 authored by Mark Salter's avatar Mark Salter Committed by Catalin Marinas
Browse files

Documentation/arm64: clarify requirements for DTB placement 



The current description of DTB placement requirements does not quite
match the kernel code in head.S: __vet_fdt and __create_page_tables.
This patch tweaks the text to match the actual requirements placed on
it by the code.

Signed-off-by: default avatarMark Salter <msalter@redhat.com>
Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent d50240a5

Documentation/arm64/booting.txt

+3 −3
Original line number Diff line number Diff line
@@ -45,9 +45,9 @@ sees fit.) 


Requirement: MANDATORY



The device tree blob (dtb) must be no bigger than 2 megabytes in size

and placed at a 2-megabyte boundary within the first 512 megabytes from

the start of the kernel image. This is to allow the kernel to map the

The device tree blob (dtb) must be placed on an 8-byte boundary within

the first 512 megabytes from the start of the kernel image and must not

cross a 2-megabyte boundary. This is to allow the kernel to map the

blob using a single section mapping in the initial page tables.