| /* 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 |