diff options
| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2010-12-06 18:35:37 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-04-11 21:38:47 +0200 |
| commit | 39768f7715ed637ef02f49fc7de664cc1aaf14b3 (patch) | |
| tree | a5cc618786f64865df878d1d025de7672b5036da /arch/powerpc/cpu/ppc4xx/start.S | |
| parent | 33ee4c92339ee386662c0ee2d221098c5cc8b07e (diff) | |
| download | blackbird-obmc-uboot-39768f7715ed637ef02f49fc7de664cc1aaf14b3.tar.gz blackbird-obmc-uboot-39768f7715ed637ef02f49fc7de664cc1aaf14b3.zip | |
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/ppc4xx/start.S')
| -rw-r--r-- | arch/powerpc/cpu/ppc4xx/start.S | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/powerpc/cpu/ppc4xx/start.S b/arch/powerpc/cpu/ppc4xx/start.S index b43e22c8f0..aa03d9a770 100644 --- a/arch/powerpc/cpu/ppc4xx/start.S +++ b/arch/powerpc/cpu/ppc4xx/start.S @@ -262,6 +262,11 @@ bl reconfig_tlb0 #endif GET_GOT +#if defined(__pic__) && __pic__ == 1 + /* Needed for upcoming -msingle-pic-base */ + bl _GLOBAL_OFFSET_TABLE_@local-4 + mflr r30 +#endif bl cpu_init_f /* run low-level CPU init code (from Flash) */ bl board_init_f /* NOTREACHED - board_init_f() does not return */ @@ -799,7 +804,11 @@ _start: ori r0,r0, RESET_VECTOR@l stwu r1,-8(r1) /* Save back chain and move SP */ stw r0,+12(r1) /* Save return addr (underflow vect) */ - +#if defined(__pic__) && __pic__ == 1 + /* Needed for upcoming -msingle-pic-base */ + bl _GLOBAL_OFFSET_TABLE_@local-4 + mflr r30 +#endif #ifdef CONFIG_NAND_SPL bl nand_boot_common /* will not return */ #else @@ -914,7 +923,11 @@ _start: 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 bl board_init_f /* run first part of init code (from Flash) */ /* NOTREACHED - board_init_f() does not return */ @@ -1179,6 +1192,11 @@ _start: stw r0, +12(r1) /* Save return addr (underflow vect) */ #endif /* CONFIG_SYS_INIT_DCACHE_CS */ +#if defined(__pic__) && __pic__ == 1 + /* Needed for upcoming -msingle-pic-base */ + bl _GLOBAL_OFFSET_TABLE_@local-4 + mflr r30 +#endif #ifdef CONFIG_NAND_SPL bl nand_boot_common /* will not return */ #else |
