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authorJoakim Tjernlund <Joakim.Tjernlund@transmode.se>2010-12-06 18:35:37 +0100
committerWolfgang Denk <wd@denx.de>2011-04-11 21:38:47 +0200
commit39768f7715ed637ef02f49fc7de664cc1aaf14b3 (patch)
treea5cc618786f64865df878d1d025de7672b5036da /arch/powerpc/cpu/mpc86xx/start.S
parent33ee4c92339ee386662c0ee2d221098c5cc8b07e (diff)
downloadu-boot-linaro-stable-39768f7715ed637ef02f49fc7de664cc1aaf14b3.tar.gz
PowerPC: Add support for -msingle-pic-base
-msingle-pic-base is a new gcc option for ppc and it reduces the size of my u-boot with 6-8 KB. While at it, add -fno-jump-tables too to save a few more bytes. -msingle-pic-base will be in gcc 4.6, however backported patches are available at http://bugs.gentoo.org/show_bug.cgi?id=347281 Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Diffstat (limited to 'arch/powerpc/cpu/mpc86xx/start.S')
-rw-r--r--arch/powerpc/cpu/mpc86xx/start.S11
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/powerpc/cpu/mpc86xx/start.S b/arch/powerpc/cpu/mpc86xx/start.S
index 3e3c21eef..2ec7fd46b 100644
--- a/arch/powerpc/cpu/mpc86xx/start.S
+++ b/arch/powerpc/cpu/mpc86xx/start.S
@@ -255,7 +255,11 @@ addr_trans_enabled:
stwu r0, -4(r1) /* stack backtraces terminate cleanly */
GET_GOT /* initialize GOT access */
-
+#if defined(__pic__) && __pic__ == 1
+ /* Needed for upcoming -msingle-pic-base */
+ bl _GLOBAL_OFFSET_TABLE_@local-4
+ mflr r30
+#endif
/* run low-level CPU init code (from Flash) */
bl cpu_init_f
sync
@@ -620,6 +624,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
+#if defined(__pic__) && __pic__ == 1
+ /* Needed for upcoming -msingle-pic-base */
+ bl _GLOBAL_OFFSET_TABLE_@local-4
+ mflr r30
+#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l