linux-kernel - [RFC][PATCH 1/2] arm64: add ioread64be and iowrite64be macros

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Message-ID: <1440762587-7815-1-git-send-email-horia.geanta@freescale.com>
Date:	Fri, 28 Aug 2015 14:49:47 +0300
From:	Horia Geantă <horia.geanta@...escale.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>,
	"David S. Miller" <davem@...emloft.net>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	Scott Wood <scottwood@...escale.com>,
	Victoria Milhoan <vicki.milhoan@...escale.com>,
	Steve Cornelius <steve.cornelius@...escale.com>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Alex Porosanu <alexandru.porosanu@...escale.com>
Subject: [RFC][PATCH 1/2] arm64: add ioread64be and iowrite64be macros

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

Signed-off-by: Alex Porosanu <alexandru.porosanu@...escale.com>
Signed-off-by: Horia Geantă <horia.geanta@...escale.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

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