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kernel add
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/*
* This file contains miscellaneous low-level functions for PPC 44x.
* Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
*
* 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.
*
*/
#include <asm/reg.h>
#include <asm/ppc_asm.h>
.text
/*
* Do an IO access in AS1
*/
_GLOBAL(as1_readb)
mfmsr r7
ori r0,r7,MSR_DS
sync
mtmsr r0
sync
isync
lbz r3,0(r3)
sync
mtmsr r7
sync
isync
blr
_GLOBAL(as1_writeb)
mfmsr r7
ori r0,r7,MSR_DS
sync
mtmsr r0
sync
isync
stb r3,0(r4)
sync
mtmsr r7
sync
isync
blr
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