18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-or-later */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * This file contains miscellaneous low-level functions for PPC 44x. 48c2ecf20Sopenharmony_ci * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation. 58c2ecf20Sopenharmony_ci */ 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ci#include <asm/reg.h> 88c2ecf20Sopenharmony_ci#include <asm/ppc_asm.h> 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ci .text 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci/* 138c2ecf20Sopenharmony_ci * Do an IO access in AS1 148c2ecf20Sopenharmony_ci */ 158c2ecf20Sopenharmony_ci_GLOBAL(as1_readb) 168c2ecf20Sopenharmony_ci mfmsr r7 178c2ecf20Sopenharmony_ci ori r0,r7,MSR_DS 188c2ecf20Sopenharmony_ci sync 198c2ecf20Sopenharmony_ci mtmsr r0 208c2ecf20Sopenharmony_ci sync 218c2ecf20Sopenharmony_ci isync 228c2ecf20Sopenharmony_ci lbz r3,0(r3) 238c2ecf20Sopenharmony_ci sync 248c2ecf20Sopenharmony_ci mtmsr r7 258c2ecf20Sopenharmony_ci sync 268c2ecf20Sopenharmony_ci isync 278c2ecf20Sopenharmony_ci blr 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_ci_GLOBAL(as1_writeb) 308c2ecf20Sopenharmony_ci mfmsr r7 318c2ecf20Sopenharmony_ci ori r0,r7,MSR_DS 328c2ecf20Sopenharmony_ci sync 338c2ecf20Sopenharmony_ci mtmsr r0 348c2ecf20Sopenharmony_ci sync 358c2ecf20Sopenharmony_ci isync 368c2ecf20Sopenharmony_ci stb r3,0(r4) 378c2ecf20Sopenharmony_ci sync 388c2ecf20Sopenharmony_ci mtmsr r7 398c2ecf20Sopenharmony_ci sync 408c2ecf20Sopenharmony_ci isync 418c2ecf20Sopenharmony_ci blr 42