60 lines
1.0 KiB
ArmAsm
60 lines
1.0 KiB
ArmAsm
/*
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* Copyright (C) Paul Mackerras 1997.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* NOTE: this code runs in 32 bit mode and is packaged as ELF32.
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*/
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#include "ppc_asm.h"
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.text
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.globl _zimage_start
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_zimage_start:
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bl reloc_offset
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reloc_offset:
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mflr r0
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lis r9,reloc_offset@ha
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addi r9,r9,reloc_offset@l
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subf. r0,r9,r0
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beq clear_caches
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reloc_got2:
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lis r9,__got2_start@ha
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addi r9,r9,__got2_start@l
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lis r8,__got2_end@ha
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addi r8,r8,__got2_end@l
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subf. r8,r9,r8
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beq clear_caches
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srwi. r8,r8,2
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mtctr r8
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add r9,r0,r9
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reloc_got2_loop:
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lwz r8,0(r9)
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add r8,r8,r0
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stw r8,0(r9)
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addi r9,r9,4
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bdnz reloc_got2_loop
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clear_caches:
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lis r9,_start@h
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add r9,r0,r9
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lis r8,_etext@ha
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addi r8,r8,_etext@l
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add r8,r0,r8
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1: dcbf r0,r9
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icbi r0,r9
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addi r9,r9,0x20
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cmplwi 0,r9,8
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blt 1b
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sync
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isync
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mr r6,r1
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b start
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