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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>
This commit is contained in:
Joakim Tjernlund 2010-12-06 18:35:37 +01:00 committed by Wolfgang Denk
parent 33ee4c9233
commit 39768f7715
13 changed files with 127 additions and 12 deletions
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2
arch/powerpc/config.mk
View File

@ -26,6 +26,8 @@ CROSS_COMPILE ?= ppc_8xx-
STANDALONE_LOAD_ADDR = 0x40000
LDFLAGS_FINAL += --gc-sections
PLATFORM_RELFLAGS += -fpic -mrelocatable -ffunction-sections -fdata-sections
PLATFORM_RELFLAGS += $(call cc-option,-msingle-pic-base,)
PLATFORM_RELFLAGS += $(call cc-option,-fno-jump-tables,)
PLATFORM_CPPFLAGS += -DCONFIG_PPC -D__powerpc__
PLATFORM_LDFLAGS += -n

11
arch/powerpc/cpu/74xx_7xx/start.S
View File

@ -274,7 +274,11 @@ in_flash:
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
@ -588,6 +592,11 @@ 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

11
arch/powerpc/cpu/mpc512x/start.S
View File

@ -255,7 +255,11 @@ in_flash:
/*------------------------------------------------------*/
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
/* r3: IMMR */
lis r3, CONFIG_SYS_IMMR@h
/* run low-level CPU init code (in Flash) */
@ -486,6 +490,11 @@ 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

11
arch/powerpc/cpu/mpc5xx/start.S
View File

@ -174,7 +174,11 @@ in_flash:
/*----------------------------------------------------------------------*/
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
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (from Flash) */
@ -363,6 +367,11 @@ relocate_code:
mr r10, r5 /* Save copy of monitor destination Address in SRAM */
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

11
arch/powerpc/cpu/mpc5xxx/start.S
View File

@ -160,7 +160,11 @@ lowboot_reentry:
/*--------------------------------------------------------------*/
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
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (in Flash)*/
@ -549,6 +553,11 @@ 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

11
arch/powerpc/cpu/mpc8220/start.S
View File

@ -129,7 +129,11 @@ _start:
/*--------------------------------------------------------------*/
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
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (in Flash)*/
@ -522,6 +526,11 @@ 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

11
arch/powerpc/cpu/mpc824x/start.S
View File

@ -183,7 +183,11 @@ in_flash:
/*----------------------------------------------------------------------*/
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
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (from Flash) */
@ -452,6 +456,11 @@ 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 */
#ifdef CONFIG_SYS_RAMBOOT
lis r4, CONFIG_SYS_SDRAM_BASE@h /* Source Address */

6
arch/powerpc/cpu/mpc8260/start.S
View File

@ -236,7 +236,11 @@ in_flash:
/*--------------------------------------------------------------*/
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
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (in Flash)*/

11
arch/powerpc/cpu/mpc83xx/start.S
View File

@ -285,7 +285,11 @@ in_flash:
/*------------------------------------------------------*/
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
/* r3: IMMR */
lis r3, CONFIG_SYS_IMMR@h
/* run low-level CPU init code (in Flash)*/
@ -822,6 +826,11 @@ 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

10
arch/powerpc/cpu/mpc85xx/start.S
View File

@ -421,6 +421,11 @@ _start_cont:
stw r0,+12(r1) /* Save return addr (underflow vect) */
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_early_f
/* switch back to AS = 0 */
@ -921,6 +926,11 @@ 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

11
arch/powerpc/cpu/mpc86xx/start.S
View File

@ -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

11
arch/powerpc/cpu/mpc8xx/start.S
View File

@ -188,7 +188,11 @@ in_flash:
/*----------------------------------------------------------------------*/
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
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (from Flash) */
@ -473,6 +477,11 @@ 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

22
arch/powerpc/cpu/ppc4xx/start.S
View File

@ -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