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- /*
- * 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 reloc_offset
- reloc_offset:
- mflr r0
- lis r9,reloc_offset@ha
- addi r9,r9,reloc_offset@l
- subf. r0,r9,r0
- beq clear_caches
- reloc_got2:
- 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 clear_caches
- srwi. r8,r8,2
- mtctr r8
- add r9,r0,r9
- reloc_got2_loop:
- lwz r8,0(r9)
- add r8,r8,r0
- stw r8,0(r9)
- addi r9,r9,4
- bdnz reloc_got2_loop
- clear_caches:
- lis r9,_start@h
- add r9,r0,r9
- lis r8,_etext@ha
- addi r8,r8,_etext@l
- add r8,r0,r8
- 1: dcbf r0,r9
- icbi r0,r9
- addi r9,r9,0x20
- cmplwi 0,r9,8
- blt 1b
- sync
- isync
- mr r6,r1
- b start
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