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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
|
|
