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authorDavid Gibson <david@gibson.dropbear.id.au>2007-03-14 11:50:40 +1100
committerPaul Mackerras <paulus@samba.org>2007-03-16 16:38:19 +1100
commit0e0293c898c424c52e5d4e7f6923a203d06b9c4b (patch)
tree54078533f47d45c0840095901e416dfa543393ba /include/asm-powerpc
parenta782a9e3a12bcea4916117b0832016c24fffeb85 (diff)
[POWERPC] Update documentation for flat device tree format v17
This patch updates booting-without-of.txt to describe version 17 of the flattened device tree format. Version 17 is a small, backwards compatible change from version 16, adding an extra field giving the size of the device tree's structure block. At this time, the kernel has no use for the extra information, however its presence can make life easier for bootloaders or other software manipulating the tree. In addition this patch adds information on the size_dt_strings field of the device tree header, present since version 3 of the flattened tree format, but omitted from the documentation. It also makes changes to consistently refer to versions 16 and 17 as versions 16 and 17 in decimal, rather than version 0x10 which was occasionally used for version 16 previously. Finally, we also add the new field to the definition of the device tree header structure in prom.h Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/prom.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h
index 1aa15e2e056..994de8ea330 100644
--- a/include/asm-powerpc/prom.h
+++ b/include/asm-powerpc/prom.h
@@ -59,6 +59,8 @@ struct boot_param_header
u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
/* version 3 fields below */
u32 dt_strings_size; /* size of the DT strings block */
+ /* version 17 fields below */
+ u32 dt_struct_size; /* size of the DT structure block */
};