1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun/* 3*4882a593Smuzhiyun * This file contains miscellaneous low-level functions for PPC 44x. 4*4882a593Smuzhiyun * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation. 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun#include <asm/reg.h> 8*4882a593Smuzhiyun#include <asm/ppc_asm.h> 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun .text 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun/* 13*4882a593Smuzhiyun * Do an IO access in AS1 14*4882a593Smuzhiyun */ 15*4882a593Smuzhiyun_GLOBAL(as1_readb) 16*4882a593Smuzhiyun mfmsr r7 17*4882a593Smuzhiyun ori r0,r7,MSR_DS 18*4882a593Smuzhiyun sync 19*4882a593Smuzhiyun mtmsr r0 20*4882a593Smuzhiyun sync 21*4882a593Smuzhiyun isync 22*4882a593Smuzhiyun lbz r3,0(r3) 23*4882a593Smuzhiyun sync 24*4882a593Smuzhiyun mtmsr r7 25*4882a593Smuzhiyun sync 26*4882a593Smuzhiyun isync 27*4882a593Smuzhiyun blr 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun_GLOBAL(as1_writeb) 30*4882a593Smuzhiyun mfmsr r7 31*4882a593Smuzhiyun ori r0,r7,MSR_DS 32*4882a593Smuzhiyun sync 33*4882a593Smuzhiyun mtmsr r0 34*4882a593Smuzhiyun sync 35*4882a593Smuzhiyun isync 36*4882a593Smuzhiyun stb r3,0(r4) 37*4882a593Smuzhiyun sync 38*4882a593Smuzhiyun mtmsr r7 39*4882a593Smuzhiyun sync 40*4882a593Smuzhiyun isync 41*4882a593Smuzhiyun blr 42