[PATCH 2/2] powerpc: Add real mode cache inhibited IO accessors
From: Michael Ellerman <hidden>
Date: 2013-09-25 05:38:52
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
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 <redacted> --- arch/powerpc/include/asm/io.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 8b3bd66..1cac8d3 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h@@ -178,10 +178,24 @@ DEF_MMIO_OUT_DFORM(out_be32, 32, stw); DEF_MMIO_OUT_XFORM(out_le16, 16, sthbrx); DEF_MMIO_OUT_XFORM(out_le32, 32, stwbrx); +/* + * Cache inhibitied accessors for use in real mode, you don't want to use these + * unless you know what you're doing. + */ +DEF_MMIO_OUT_XFORM(out_rm8, 8, stbcix); +DEF_MMIO_OUT_XFORM(out_rm16, 16, sthcix); +DEF_MMIO_OUT_XFORM(out_rm32, 32, stwcix); +DEF_MMIO_IN_XFORM(in_rm8, 8, lbzcix); +DEF_MMIO_IN_XFORM(in_rm16, 16, lhzcix); +DEF_MMIO_IN_XFORM(in_rm32, 32, lwzcix); + #ifdef __powerpc64__ DEF_MMIO_OUT_DFORM(out_be64, 64, std); DEF_MMIO_IN_DFORM(in_be64, 64, ld); +DEF_MMIO_OUT_XFORM(out_rm64, 64, stdcix); +DEF_MMIO_IN_XFORM(in_rm64, 64, ldcix); + /* There is no asm instructions for 64 bits reverse loads and stores */ static inline u64 in_le64(const volatile u64 __iomem *addr) {
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1.8.1.2