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 <[email protected]> Acked-by: Will Deacon <[email protected]> Signed-off-by: Catalin Marinas <[email protected]>
niw · Sep 5, 2013 · 4d5e0b1 · 4d5e0b1
1 parent d50240a
commit 4d5e0b1
Showing 1 changed file with 3 additions and 3 deletions.
diff --git 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.