diff options
Diffstat (limited to 'arch/ppc64/boot')
| -rw-r--r-- | arch/ppc64/boot/crt0.S | 19 | ||||
| -rw-r--r-- | arch/ppc64/boot/main.c | 3 |
2 files changed, 3 insertions, 19 deletions
diff --git a/arch/ppc64/boot/crt0.S b/arch/ppc64/boot/crt0.S index 3861e7f9cf1..da6618a865c 100644 --- a/arch/ppc64/boot/crt0.S +++ b/arch/ppc64/boot/crt0.S @@ -25,24 +25,5 @@ _start: sync isync - ## Clear out the BSS as per ANSI C requirements - - lis r7,_end@ha - addi r7,r7,_end@l # r7 = &_end - lis r8,__bss_start@ha # - addi r8,r8,__bss_start@l # r8 = &_bss_start - - ## Determine how large an area, in number of words, to clear - - subf r7,r8,r7 # r7 = &_end - &_bss_start + 1 - addi r7,r7,3 # r7 += 3 - srwi. r7,r7,2 # r7 = size in words. - beq 3f # If the size is zero, don't bother - addi r8,r8,-4 # r8 -= 4 - mtctr r7 # SPRN_CTR = number of words to clear - li r0,0 # r0 = 0 -2: stwu r0,4(r8) # Clear out a word - bdnz 2b # Keep clearing until done -3: b start diff --git a/arch/ppc64/boot/main.c b/arch/ppc64/boot/main.c index d039c47f8e5..c2c1f330911 100644 --- a/arch/ppc64/boot/main.c +++ b/arch/ppc64/boot/main.c @@ -26,6 +26,7 @@ extern void flush_cache(void *, unsigned long); #define ONE_MB 0x100000 extern char _start[]; +extern char __bss_start[]; extern char _end[]; extern char _vmlinux_start[]; extern char _vmlinux_end[]; @@ -138,6 +139,8 @@ void start(unsigned long a1, unsigned long a2, void *promptr) Elf64_Ehdr *elf64; Elf64_Phdr *elf64ph; + memset(__bss_start, 0, _end - __bss_start); + prom = (int (*)(void *)) promptr; chosen_handle = finddevice("/chosen"); if (chosen_handle == (void *) -1) |