linux-kernel - [PATCH 3/7] powerpc: add io{read,write}64 accessors

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Message-ID: <1462382198-11985-1-git-send-email-horia.geanta@nxp.com>
Date:	Wed, 4 May 2016 20:16:38 +0300
From:	Horia Geantă <horia.geanta@....com>
To:	Herbert Xu <herbert@...dor.apana.org.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	"Michael Ellerman" <mpe@...erman.id.au>
CC:	<linux-crypto@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.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 3/7] powerpc: add io{read,write}64 accessors

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

Signed-off-by: Horia Geantă <horia.geanta@....com>
---
 arch/powerpc/kernel/iomap.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/powerpc/kernel/iomap.c b/arch/powerpc/kernel/iomap.c
index 12e48d56f771..3963f0b68d52 100644
--- a/arch/powerpc/kernel/iomap.c
+++ b/arch/powerpc/kernel/iomap.c
@@ -38,6 +38,18 @@ EXPORT_SYMBOL(ioread16);
 EXPORT_SYMBOL(ioread16be);
 EXPORT_SYMBOL(ioread32);
 EXPORT_SYMBOL(ioread32be);
+#ifdef __powerpc64__
+u64 ioread64(void __iomem *addr)
+{
+	return readq(addr);
+}
+u64 ioread64be(void __iomem *addr)
+{
+	return readq_be(addr);
+}
+EXPORT_SYMBOL(ioread64);
+EXPORT_SYMBOL(ioread64be);
+#endif /* __powerpc64__ */
 
 void iowrite8(u8 val, void __iomem *addr)
 {
@@ -64,6 +76,18 @@ EXPORT_SYMBOL(iowrite16);
 EXPORT_SYMBOL(iowrite16be);
 EXPORT_SYMBOL(iowrite32);
 EXPORT_SYMBOL(iowrite32be);
+#ifdef __powerpc64__
+void iowrite64(u64 val, void __iomem *addr)
+{
+	writeq(val, addr);
+}
+void iowrite64be(u64 val, void __iomem *addr)
+{
+	writeq_be(val, addr);
+}
+EXPORT_SYMBOL(iowrite64);
+EXPORT_SYMBOL(iowrite64be);
+#endif /* __powerpc64__ */
 
 /*
  * These are the "repeat read/write" functions. Note the
-- 
2.4.4