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microblaze: Clear print messages for DTB passing via r7
author
Michal Simek
<monstr@monstr.eu>
Mon, 22 Jun 2009 10:31:55 +0000
(12:31 +0200)
committer
Michal Simek
<monstr@monstr.eu>
Mon, 27 Jul 2009 05:39:54 +0000
(07:39 +0200)
It is necessary to zeroed r7 when r7 points to bad
dtb - this caused that we have correct messages
about compiled-in dtb or passing via r7
Signed-off-by: Michal Simek <monstr@monstr.eu>
arch/microblaze/kernel/head.S
patch
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diff --git
a/arch/microblaze/kernel/head.S
b/arch/microblaze/kernel/head.S
index
3c4d4a2
..
e41c6ce
100644
(file)
--- a/
arch/microblaze/kernel/head.S
+++ b/
arch/microblaze/kernel/head.S
@@
-62,7
+62,10
@@
ENTRY(_start)
beqi r7, no_fdt_arg /* NULL pointer? don't copy */
lw r11, r0, r7 /* Does r7 point to a */
rsubi r11, r11, OF_DT_HEADER /* valid FDT? */
+ beqi r11, _prepare_copy_fdt
+ or r7, r0, r0 /* clear R7 when not valid DTB */
bnei r11, no_fdt_arg /* No - get out of here */
+_prepare_copy_fdt:
or r11, r0, r0 /* incremment */
ori r4, r0, TOPHYS(_fdt_start)
ori r3, r0, (0x4000 - 4)