[PATCH 3.4 45/45] alpha: add io{read,write}{16,32}be functions

Zefan Li
2014-09-23T02:41:31Z

From: Michael Cree <mcree@orcon.net.nz>

3.4.104-rc1 review patch. If anyone has any objections, please let me know.

------------------

commit 25534eb7707821b796fd84f7115367e02f36aa60 upstream.

These functions are used in some PCI drivers with big-endian
MMIO space.

Admittedly it is almost certain that no one this side of the
Moon would use such a card in an Alpha but it does get us
closer to being able to build allyesconfig or allmodconfig,
and it enables the Debian default generic config to build.

Tested-by: Raúl Porcel <armin76@gentoo.org>
Signed-off-by: Michael Cree <mcree@orcon.net.nz>
Signed-off-by: Matt Turner <mattst88@gmail.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Zefan Li <lizefan@huawei.com>
---
arch/alpha/include/asm/io.h | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index 7a3d38d..5ebab58 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -489,6 +489,11 @@ extern inline void writeq(u64 b, volatile void __iomem *addr)
}
#endif

+#define ioread16be(p) be16_to_cpu(ioread16(p))
+#define ioread32be(p) be32_to_cpu(ioread32(p))
+#define iowrite16be(v,p) iowrite16(cpu_to_be16(v), (p))
+#define iowrite32be(v,p) iowrite32(cpu_to_be32(v), (p))
+
#define inb_p inb
#define inw_p inw
#define inl_p inl
--
1.7.9.5