/* 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