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From: Andre Przywara <andre.przywara@arm.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] arm64: Juno/FVP: adjust kernel load address
Date: Mon,  4 Jan 2016 15:43:36 +0000	[thread overview]
Message-ID: <1451922216-14477-1-git-send-email-andre.przywara@arm.com> (raw)

The default kernel load offset for an arm64 kernel is 0x80000, so
U-Boot takes cares of moving the loaded kernel to a matching memory
location just before booting it.
Since we run with caches off, this takes a while for any decently
sized kernel - with no output explaining the reason for the delay
(unless one uses a DEBUG build).
By adjusting the default load offset for Juno and VFP to be 512K
aligned in the first place we can skip this copying and boot much
faster.
Tested on Juno.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
 include/configs/vexpress_aemv8a.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/configs/vexpress_aemv8a.h b/include/configs/vexpress_aemv8a.h
index c767f90..814934a 100644
--- a/include/configs/vexpress_aemv8a.h
+++ b/include/configs/vexpress_aemv8a.h
@@ -189,7 +189,7 @@
 #define CONFIG_EXTRA_ENV_SETTINGS	\
 				"kernel_name=norkern\0"	\
 				"kernel_alt_name=Image\0"	\
-				"kernel_addr=0x80000000\0" \
+				"kernel_addr=0x80080000\0" \
 				"initrd_name=ramdisk.img\0"	\
 				"initrd_addr=0x84000000\0"	\
 				"fdt_name=board.dtb\0" \
@@ -233,7 +233,7 @@
 #elif CONFIG_TARGET_VEXPRESS64_BASE_FVP
 #define CONFIG_EXTRA_ENV_SETTINGS	\
 				"kernel_name=Image\0"		\
-				"kernel_addr=0x80000000\0"	\
+				"kernel_addr=0x80080000\0"	\
 				"initrd_name=ramdisk.img\0"	\
 				"initrd_addr=0x88000000\0"	\
 				"fdt_name=devtree.dtb\0"	\
-- 
2.6.4

             reply	other threads:[~2016-01-04 15:43 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-04 15:43 Andre Przywara [this message]
2016-01-05  9:48 ` [U-Boot] [PATCH] arm64: Juno/FVP: adjust kernel load address Linus Walleij
2016-01-05 14:41   ` Ryan Harkin
2016-01-09  3:35 ` [U-Boot] " Tom Rini

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