7e658118fa
Show firmware provided stackpointer during boot. This helps to find the "taboo" areas on the various boards. claim tends to fail for these memory areas, but some jokers return success anyway. Use %p to print the load address, its a pointer. Signed-off-by: Olaf Hering <olh@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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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