linux-kernel - [PATCH 2/7] arm64: add io{read,write}64be accessors

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Message-ID: <1462382190-11937-1-git-send-email-horia.geanta@nxp.com>
Date:	Wed, 4 May 2016 20:16:30 +0300
From:	Horia Geantă <horia.geanta@....com>
To:	Herbert Xu <herbert@...dor.apana.org.au>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
CC:	<linux-crypto@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Scott Wood <scott.wood@....com>,
	Alexandru Porosanu <alexandru.porosanu@....com>,
	Tudor Ambarus <tudor-dan.ambarus@....com>,
	Cristian Stoica <cristian.stoica@....com>
Subject: [PATCH 2/7] arm64: add io{read,write}64be accessors

This will allow device drivers to consistently use io{read,write}XXbe
also for 64-bit accesses.

Signed-off-by: Alex Porosanu <alexandru.porosanu@....com>
Signed-off-by: Horia Geantă <horia.geanta@....com>
---
 arch/arm64/include/asm/io.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 44be1e03ed65..9b6e408cfa51 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -174,13 +174,15 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
 #define iounmap				__iounmap
 
 /*
- * io{read,write}{16,32}be() macros
+ * io{read,write}{16,32,64}be() macros
  */
 #define ioread16be(p)		({ __u16 __v = be16_to_cpu((__force __be16)__raw_readw(p)); __iormb(); __v; })
 #define ioread32be(p)		({ __u32 __v = be32_to_cpu((__force __be32)__raw_readl(p)); __iormb(); __v; })
+#define ioread64be(p)		({ __u64 __v = be64_to_cpu((__force __be64)__raw_readq(p)); __iormb(); __v; })
 
 #define iowrite16be(v,p)	({ __iowmb(); __raw_writew((__force __u16)cpu_to_be16(v), p); })
 #define iowrite32be(v,p)	({ __iowmb(); __raw_writel((__force __u32)cpu_to_be32(v), p); })
+#define iowrite64be(v,p)	({ __iowmb(); __raw_writeq((__force __u64)cpu_to_be64(v), p); })
 
 /*
  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
-- 
2.4.4