diff options
Diffstat (limited to 'arch/powerpc/platforms/44x/misc_44x.S')
| -rw-r--r-- | arch/powerpc/platforms/44x/misc_44x.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/44x/misc_44x.S b/arch/powerpc/platforms/44x/misc_44x.S new file mode 100644 index 000000000..3a0c4bd3d --- /dev/null +++ b/arch/powerpc/platforms/44x/misc_44x.S @@ -0,0 +1,41 @@ +/* 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 |