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From a.othieno@bluewin.ch Tue Oct 11 07:50:21 2005
From: Arthur Othieno <a.othieno@bluewin.ch>
Subject: Big-endian I/O memory accessors.
Date: Tue, 11 Oct 2005 07:50:21 +1000
X-Patchwork-ID: 2759
From: Arthur Othieno <a.othieno@bluewin.ch>
I/O memory accessors. Big endian version. For those busses/devices
that do export big-endian I/O memory.
Of notable relevance/reference:
http://lwn.net/Articles/132804/
http://ozlabs.org/pipermail/linuxppc-embedded/2005-August/019798.html
http://ozlabs.org/pipermail/linuxppc-embedded/2005-August/019752.html
Signed-off-by: Arthur Othieno <a.othieno@bluewin.ch>
---
Paulus,
A similar patch for ppc64 made it upstream with your big ppc64 merge.
This one is still sitting in http://patchwork.ozlabs.org/linuxppc/
and didn't make it with the ppc32 equivalent. Thanks.
include/asm-ppc/io.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
---
--- a/include/asm-ppc/io.h
+++ b/include/asm-ppc/io.h
@@ -413,11 +413,21 @@
return readw(addr);
}
+static inline unsigned int ioread16be(void __iomem *addr)
+{
+ return in_be16(addr);
+}
+
static inline unsigned int ioread32(void __iomem *addr)
{
return readl(addr);
}
+static inline unsigned int ioread32be(void __iomem *addr)
+{
+ return in_be32(addr);
+}
+
static inline void iowrite8(u8 val, void __iomem *addr)
{
writeb(val, addr);
@@ -428,11 +438,21 @@
writew(val, addr);
}
+static inline void iowrite16be(u16 val, void __iomem *addr)
+{
+ out_be16(addr, val);
+}
+
static inline void iowrite32(u32 val, void __iomem *addr)
{
writel(val, addr);
}
+static inline void iowrite32be(u32 val, void __iomem *addr)
+{
+ out_be32(addr, val);
+}
+
static inline void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
{
_insb(addr, dst, count);
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