From 0150a3dd92fc45b599bf2442b47d40921b4aa2d2 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Fri, 29 Nov 2013 13:27:18 +1100 Subject: [PATCH] powerpc: Add real mode cache inhibited IO accessors These accessors allow us to do cache inhibited accesses when in real mode. They should only be used in real mode. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/io.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 575fbf81fad0..97d3869991ca 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -191,8 +191,24 @@ DEF_MMIO_OUT_D(out_le32, 32, stw); #endif /* __BIG_ENDIAN */ +/* + * Cache inhibitied accessors for use in real mode, you don't want to use these + * unless you know what you're doing. + * + * NB. These use the cpu byte ordering. + */ +DEF_MMIO_OUT_X(out_rm8, 8, stbcix); +DEF_MMIO_OUT_X(out_rm16, 16, sthcix); +DEF_MMIO_OUT_X(out_rm32, 32, stwcix); +DEF_MMIO_IN_X(in_rm8, 8, lbzcix); +DEF_MMIO_IN_X(in_rm16, 16, lhzcix); +DEF_MMIO_IN_X(in_rm32, 32, lwzcix); + #ifdef __powerpc64__ +DEF_MMIO_OUT_X(out_rm64, 64, stdcix); +DEF_MMIO_IN_X(in_rm64, 64, ldcix); + #ifdef __BIG_ENDIAN__ DEF_MMIO_OUT_D(out_be64, 64, std); DEF_MMIO_IN_D(in_be64, 64, ld); -- 2.20.1