diff options
Diffstat (limited to 'arch/powerpc/boot/crt0.S')
| -rw-r--r-- | arch/powerpc/boot/crt0.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/powerpc/boot/crt0.S b/arch/powerpc/boot/crt0.S new file mode 100644 index 00000000000..d2f2ace56cd --- /dev/null +++ b/arch/powerpc/boot/crt0.S @@ -0,0 +1,58 @@ +/* + * Copyright (C) Paul Mackerras 1997. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * NOTE: this code runs in 32 bit mode and is packaged as ELF32. + */ + +#include "ppc_asm.h" + + .text + .globl _zimage_start +_zimage_start: + bl 1f + +1: + mflr r0 + lis r9,1b@ha + addi r9,r9,1b@l + subf. r0,r9,r0 + beq 3f + + lis r9,__got2_start@ha + addi r9,r9,__got2_start@l + lis r8,__got2_end@ha + addi r8,r8,__got2_end@l + subf. r8,r9,r8 + beq 3f + srwi. r8,r8,2 + mtctr r8 + add r9,r0,r9 +2: + lwz r8,0(r9) + add r8,r8,r0 + stw r8,0(r9) + addi r9,r9,4 + bdnz 2b + +3: + lis r9,_start@h + add r9,r0,r9 + lis r8,_etext@ha + addi r8,r8,_etext@l + add r8,r0,r8 +4: dcbf r0,r9 + icbi r0,r9 + addi r9,r9,0x20 + cmplwi 0,r9,8 + blt 4b + sync + isync + + mr r6,r1 + b start + |