[PATCH] powerpc: Add real mode cache inhibited IO accessors
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2013-11-29 02:27:18
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
From: Michael Ellerman <redacted> 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 | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 575fbf8..97d3869 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);
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1.8.3.2