diff options
| author | Joakim Tjernlund | 2018-12-06 17:20:53 +0100 |
|---|---|---|
| committer | York Sun | 2019-01-23 10:48:48 -0800 |
| commit | 45e81f9ab3e97aec8e8744b23589bc21086cfd43 (patch) | |
| tree | e0a6f5e5ace301c4731ee49ae04553b2b67ccdc8 | |
| parent | 7794fe2c8c1303d303dbc515955c6c5be706da88 (diff) | |
mpc85xx: Add support for -msingle-pic-base
-msingle-pic-base is a new gcc(from 4.6) option for ppc and
it reduces the size of my u-boot with about 4-5 KB.
While at it, add -fno-jump-tables too to save a
few more bytes.
e5500 core:
size u-boot.bef
text data bss dec hex filename
473043 23772 307104 803919 c444f u-boot.bef
size u-boot.aft
text data bss dec hex filename
453195 23772 307104 784071 bf6c7 u-boot.aft
e500 core:
size u-boot.bef
text data bss dec hex filename
292998 17868 24968 335834 51fda u-boot.bef
size u-boot.aft
text data bss dec hex filename
288002 17868 24968 330838 50c56 u-boot.aft
Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Reviewed-by: York Sun <york.sun@nxp.com>
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/config.mk | 1 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/start.S | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/config.mk b/arch/powerpc/cpu/mpc85xx/config.mk index 44d69add680..7a1d81cf2d7 100644 --- a/arch/powerpc/cpu/mpc85xx/config.mk +++ b/arch/powerpc/cpu/mpc85xx/config.mk @@ -4,6 +4,7 @@ # Xianghua Xiao, X.Xiao@motorola.com PLATFORM_CPPFLAGS += -Wa,-me500 -msoft-float -mno-string +PLATFORM_RELFLAGS += -msingle-pic-base -fno-jump-tables # -mspe=yes is needed to have -mno-spe accepted by a buggy GCC; # see "[PATCH,rs6000] make -mno-spe work as expected" on diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S index 932aa08b276..dbc705388c9 100644 --- a/arch/powerpc/cpu/mpc85xx/start.S +++ b/arch/powerpc/cpu/mpc85xx/start.S @@ -1216,6 +1216,9 @@ _start_cont: mr r1,r3 /* Transfer to SP(r1) */ GET_GOT + /* Needed for -msingle-pic-base */ + bl _GLOBAL_OFFSET_TABLE_@local-4 + mflr r30 /* Pass our potential ePAPR device tree pointer to cpu_init_early_f */ mr r3, r24 |