diff options
Diffstat (limited to 'cpu/xscale/start.S')
| -rw-r--r-- | cpu/xscale/start.S | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/cpu/xscale/start.S b/cpu/xscale/start.S index e63fece8b21..3d9784ebf4f 100644 --- a/cpu/xscale/start.S +++ b/cpu/xscale/start.S @@ -84,6 +84,17 @@ _armboot_end: .word armboot_end /* + * This is defined in the board specific linker script + */ +.globl _bss_start +_bss_start: + .word bss_start + +.globl _bss_end +_bss_end: + .word bss_end + +/* * _armboot_real_end is the first usable RAM address behind armboot * and the various stacks */ @@ -143,7 +154,20 @@ copy_loop: ldr r0, _uboot_reloc /* upper 128 KiB: relocated uboot */ sub r0, r0, #CFG_MALLOC_LEN /* malloc area */ /* FIXME: bdinfo should be here */ - sub sp, r0, #12 /* leave 3 words for abort-stack */ + sub sp, r0, #12 /* leave 3 words for abort-stack */ + +clear_bss: + + ldr r0, _bss_start /* find start of bss segment */ + add r0, r0, #4 /* start at first byte of bss */ + ldr r1, _bss_end /* stop here */ + mov r2, #0x00000000 /* clear */ + +clbss_l:str r2, [r0] /* clear loop... */ + add r0, r0, #4 + cmp r0, r1 + bne clbss_l + ldr pc, _start_armboot |