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| /* SPDX-License-Identifier: GPL-2.0-or-later */
| /*
| * This file contains miscellaneous low-level functions for PPC 44x.
| * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
| */
|
| #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
|
|
