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| author | Mark Salter <msalter@redhat.com> | 2013-09-04 15:10:02 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-09-05 17:29:05 +0100 |
| commit | 4d5e0b1527dd330940e8b7180b8d7016fc900352 (patch) | |
| tree | 57f22cae744fce34539f43959abead7201fb05ca /Documentation/arm64 | |
| parent | d50240a5f6ceaf690a77b0fccb17be51cfa151c2 (diff) | |
| download | lwn-4d5e0b1527dd330940e8b7180b8d7016fc900352.tar.gz lwn-4d5e0b1527dd330940e8b7180b8d7016fc900352.zip | |
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: Mark Salter <msalter@redhat.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation/arm64')
| -rw-r--r-- | Documentation/arm64/booting.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/arm64/booting.txt b/Documentation/arm64/booting.txt index 5273c4d60e65..98df4a03807e 100644 --- a/Documentation/arm64/booting.txt +++ b/Documentation/arm64/booting.txt @@ -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. |