From: Michael Ellerman <michael@ellerman.id.au>
To: <linuxppc-dev@ozlabs.org>
Subject: [PATCH 2/2] powerpc: Add real mode cache inhibited IO accessors
Date: Wed, 25 Sep 2013 15:38:52 +1000 [thread overview]
Message-ID: <1380087532-20219-2-git-send-email-michael@ellerman.id.au> (raw)
In-Reply-To: <1380087532-20219-1-git-send-email-michael@ellerman.id.au>
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 <michael@ellerman.id.au>
---
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)
{
--
1.8.1.2
prev parent reply other threads:[~2013-09-25 5:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-25 5:38 [PATCH 1/2] powerpc: Rename IO accessor generation macros Michael Ellerman
2013-09-25 5:38 ` Michael Ellerman [this message]
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