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| author | Jeroen Hofstee <jeroen@myspectrum.nl> | 2013-09-21 14:04:41 +0200 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-09-23 18:00:02 +0200 |
| commit | fe1378a961e508b31b1f29a2bb08ba1dac063155 (patch) | |
| tree | 83fdb3942c96af386587a5fe1d58f734cfe2e670 /arch | |
| parent | a81872ff27bb66578ae515ec5079cf191656b1c1 (diff) | |
| download | u-boot-imx-fe1378a961e508b31b1f29a2bb08ba1dac063155.zip u-boot-imx-fe1378a961e508b31b1f29a2bb08ba1dac063155.tar.gz u-boot-imx-fe1378a961e508b31b1f29a2bb08ba1dac063155.tar.bz2 | |
ARM: use r9 for gd
To be more EABI compliant and as a preparation for building
with clang, use the platform-specific r9 register for gd
instead of r8.
note: The FIQ is not updated since it is not used in u-boot,
and under discussion for the time being.
The following checkpatch warning is ignored:
WARNING: Use of volatile is usually wrong: see
Documentation/volatile-considered-harmful.txt
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/config.mk | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/lowlevel_init.S | 4 | ||||
| -rw-r--r-- | arch/arm/include/asm/global_data.h | 2 | ||||
| -rw-r--r-- | arch/arm/lib/crt0.S | 16 |
4 files changed, 12 insertions, 12 deletions
diff --git a/arch/arm/config.mk b/arch/arm/config.mk index 16c2e3d..d0cf43f 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -17,7 +17,7 @@ endif LDFLAGS_FINAL += --gc-sections PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ - -fno-common -ffixed-r8 -msoft-float + -fno-common -ffixed-r9 -msoft-float # Support generic board on ARM __HAVE_ARCH_GENERIC_BOARD := y diff --git a/arch/arm/cpu/armv7/lowlevel_init.S b/arch/arm/cpu/armv7/lowlevel_init.S index 82b2b86..69e3053 100644 --- a/arch/arm/cpu/armv7/lowlevel_init.S +++ b/arch/arm/cpu/armv7/lowlevel_init.S @@ -22,11 +22,11 @@ ENTRY(lowlevel_init) ldr sp, =CONFIG_SYS_INIT_SP_ADDR bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ #ifdef CONFIG_SPL_BUILD - ldr r8, =gdata + ldr r9, =gdata #else sub sp, #GD_SIZE bic sp, sp, #7 - mov r8, sp + mov r9, sp #endif /* * Save the old lr(passed in ip) and the current lr to stack diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h index 79a9597..e126436 100644 --- a/arch/arm/include/asm/global_data.h +++ b/arch/arm/include/asm/global_data.h @@ -47,6 +47,6 @@ struct arch_global_data { #include <asm-generic/global_data.h> -#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r8") +#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r9") #endif /* __ASM_GBL_DATA_H */ diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S index 960d12e..ac54b93 100644 --- a/arch/arm/lib/crt0.S +++ b/arch/arm/lib/crt0.S @@ -69,7 +69,7 @@ ENTRY(_main) bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ sub sp, #GD_SIZE /* allocate one GD above SP */ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ - mov r8, sp /* GD is above SP */ + mov r9, sp /* GD is above SP */ mov r0, #0 bl board_init_f @@ -81,15 +81,15 @@ ENTRY(_main) * 'here' but relocated. */ - ldr sp, [r8, #GD_START_ADDR_SP] /* sp = gd->start_addr_sp */ + ldr sp, [r9, #GD_START_ADDR_SP] /* sp = gd->start_addr_sp */ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ - ldr r8, [r8, #GD_BD] /* r8 = gd->bd */ - sub r8, r8, #GD_SIZE /* new GD is below bd */ + ldr r9, [r9, #GD_BD] /* r9 = gd->bd */ + sub r9, r9, #GD_SIZE /* new GD is below bd */ adr lr, here - ldr r0, [r8, #GD_RELOC_OFF] /* r0 = gd->reloc_off */ + ldr r0, [r9, #GD_RELOC_OFF] /* r0 = gd->reloc_off */ add lr, lr, r0 - ldr r0, [r8, #GD_RELOCADDR] /* r0 = gd->relocaddr */ + ldr r0, [r9, #GD_RELOCADDR] /* r0 = gd->relocaddr */ b relocate_code here: @@ -111,8 +111,8 @@ clbss_l:cmp r0, r1 /* while not at end of BSS */ bl red_led_on /* call board_init_r(gd_t *id, ulong dest_addr) */ - mov r0, r8 /* gd_t */ - ldr r1, [r8, #GD_RELOCADDR] /* dest_addr */ + mov r0, r9 /* gd_t */ + ldr r1, [r9, #GD_RELOCADDR] /* dest_addr */ /* call board_init_r */ ldr pc, =board_init_r /* this is auto-relocated! */ |