mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 16:12:02 +00:00
eacb1962d4
Correct the loop for cacheflush. No idea where I copied the code from, but the original does not work correct. Maybe the flush is not needed. Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
65 lines
1.3 KiB
ArmAsm
65 lines
1.3 KiB
ArmAsm
/*
|
|
* 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
|
|
/* a procedure descriptor used when booting this as a COFF file */
|
|
_zimage_start_opd:
|
|
.long _zimage_start, 0, 0, 0
|
|
|
|
.globl _zimage_start
|
|
_zimage_start:
|
|
/* Work out the offset between the address we were linked at
|
|
and the address where we're running. */
|
|
bl 1f
|
|
1: mflr r0
|
|
lis r9,1b@ha
|
|
addi r9,r9,1b@l
|
|
subf. r0,r9,r0
|
|
beq 3f /* if running at same address as linked */
|
|
|
|
/* The .got2 section contains a list of addresses, so add
|
|
the address offset onto each entry. */
|
|
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
|
|
|
|
/* Do a cache flush for our text, in case OF didn't */
|
|
3: lis r9,_start@ha
|
|
addi r9,r9,_start@l
|
|
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
|
|
cmplw cr0,r9,r8
|
|
blt 4b
|
|
sync
|
|
isync
|
|
|
|
mr r6,r1
|
|
b start
|
|
|