There is quite a bit of assembler code that can be removed if we use the generic global_data setup. Less arch-specific code makes it easier to add new features and maintain the start-up code.
Drop the unneeded code and adjust the hooks in board_f.c to cope.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v4: None Changes in v3: None Changes in v2: None
arch/arm/lib/crt0.S | 28 ++++------------------------ 1 file changed, 4 insertions(+), 24 deletions(-)
diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S index 4c3a94a..80548eb 100644 --- a/arch/arm/lib/crt0.S +++ b/arch/arm/lib/crt0.S @@ -82,31 +82,11 @@ ENTRY(_main) #else bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ #endif - mov r2, sp - sub sp, sp, #GD_SIZE /* allocate one GD above SP */ -#if defined(CONFIG_CPU_V7M) /* v7M forbids using SP as BIC destination */ - mov r3, sp - bic r3, r3, #7 - mov sp, r3 -#else - bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ -#endif - mov r9, sp /* GD is above SP */ - mov r1, sp + mov r0, sp + bl board_init_f_mem + mov sp, r0 + mov r0, #0 -clr_gd: - cmp r1, r2 /* while not at end of GD */ -#if defined(CONFIG_CPU_V7M) - itt lo -#endif - strlo r0, [r1] /* clear 32-bit GD word */ - addlo r1, r1, #4 /* move to next */ - blo clr_gd -#if defined(CONFIG_SYS_MALLOC_F_LEN) - sub sp, sp, #CONFIG_SYS_MALLOC_F_LEN - str sp, [r9, #GD_MALLOC_BASE] -#endif - /* mov r0, #0 not needed due to above code */ bl board_init_f
#if ! defined(CONFIG_SPL_BUILD)