leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

arm: Switch 32-bit ARM to using generic global_data setup

Browse Source 
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>
This commit is contained in:
Simon Glass 2015-10-19 06:50:00 -06:00 committed by Tom Rini
parent 931bec31b4
commit 5ba534d247
1 changed files with 4 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
arch/arm/lib/crt0.S
View File

@ -82,31 +82,11 @@ ENTRY(_main)
#else #else
bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
#endif #endif
mov r2, sp mov r0, sp
sub sp, sp, #GD_SIZE /* allocate one GD above SP */ bl board_init_f_mem
#if defined(CONFIG_CPU_V7M) /* v7M forbids using SP as BIC destination */ mov sp, r0
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, #0 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 bl board_init_f
#if ! defined(CONFIG_SPL_BUILD) #if ! defined(CONFIG_SPL_BUILD)