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