| Message ID | 20181206162053.30926-1-joakim.tjernlund@infinera.com |
|---|---|
| State | Accepted |
| Commit | 45e81f9ab3e97aec8e8744b23589bc21086cfd43 |
| Delegated to: | York Sun |
| Headers | show |
| Series | [U-Boot] mpc85xx: Add support for -msingle-pic-base | expand |
On 12/6/18 8:20 AM, Joakim Tjernlund wrote: > -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> > --- Tested on e500mc, e5500, e6500 platforms. Acked-by: York Sun <york.sun@nxp.com>
On 12/6/18 8:20 AM, Joakim Tjernlund wrote: > -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> > --- Applied to u-boot-mpc85xx, awaiting upstream. Thanks. York
diff --git a/arch/powerpc/cpu/mpc85xx/config.mk b/arch/powerpc/cpu/mpc85xx/config.mk index 44d69add68..7a1d81cf2d 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 932aa08b27..dbc705388c 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
-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> --- arch/powerpc/cpu/mpc85xx/config.mk | 1 + arch/powerpc/cpu/mpc85xx/start.S | 3 +++ 2 files changed, 4 insertions(+)