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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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