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| author | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2016-09-25 18:36:38 +0200 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2016-11-30 16:11:46 +0100 |
| commit | c3e72ab80135a19ac6eb2585b69de0acf19b87c1 (patch) | |
| tree | 91f0f05ee7e3569f503555f0c9c07bb207e0a730 | |
| parent | 65d297af7c6a08ec65bf005fa9bd5cdb955efe39 (diff) | |
MIPS: factor out code for initial stack and global data
Move the code for setting up the initial stack and global data
to a macro to be able to use it more than once.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
| -rw-r--r-- | arch/mips/cpu/start.S | 56 |
1 files changed, 30 insertions, 26 deletions
diff --git a/arch/mips/cpu/start.S b/arch/mips/cpu/start.S index 1ad1884a8d..f1040c27b6 100644 --- a/arch/mips/cpu/start.S +++ b/arch/mips/cpu/start.S @@ -52,6 +52,34 @@ sdbbp 1 # Invoke UHI operation .endm + .macro setup_stack_gd + li t0, -16 + PTR_LI t1, CONFIG_SYS_INIT_SP_ADDR + and sp, t1, t0 # force 16 byte alignment + PTR_SUBU \ + sp, sp, GD_SIZE # reserve space for gd + and sp, sp, t0 # force 16 byte alignment + move k0, sp # save gd pointer +#ifdef CONFIG_SYS_MALLOC_F_LEN + li t2, CONFIG_SYS_MALLOC_F_LEN + PTR_SUBU \ + sp, sp, t2 # reserve space for early malloc + and sp, sp, t0 # force 16 byte alignment +#endif + move fp, sp + + /* Clear gd */ + move t0, k0 +1: + PTR_S zero, 0(t0) + blt t0, t1, 1b + PTR_ADDIU t0, PTRSIZE + +#ifdef CONFIG_SYS_MALLOC_F_LEN + PTR_S sp, GD_MALLOC_BASE(k0) # gd->malloc_base offset +#endif + .endm + ENTRY(_start) /* U-Boot entry point */ b reset @@ -227,32 +255,8 @@ wr_done: # endif #endif - /* Set up temporary stack */ - li t0, -16 - PTR_LI t1, CONFIG_SYS_INIT_SP_ADDR - and sp, t1, t0 # force 16 byte alignment - PTR_SUBU \ - sp, sp, GD_SIZE # reserve space for gd - and sp, sp, t0 # force 16 byte alignment - move k0, sp # save gd pointer -#ifdef CONFIG_SYS_MALLOC_F_LEN - li t2, CONFIG_SYS_MALLOC_F_LEN - PTR_SUBU \ - sp, sp, t2 # reserve space for early malloc - and sp, sp, t0 # force 16 byte alignment -#endif - move fp, sp - - /* Clear gd */ - move t0, k0 -1: - PTR_S zero, 0(t0) - blt t0, t1, 1b - PTR_ADDIU t0, PTRSIZE - -#ifdef CONFIG_SYS_MALLOC_F_LEN - PTR_S sp, GD_MALLOC_BASE(k0) # gd->malloc_base offset -#endif + /* Set up initial stack and global data */ + setup_stack_gd move a0, zero # a0 <-- boot_flags = 0 PTR_LA t9, board_init_f |