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authorRuchika Gupta <ruchika.gupta@freescale.com>2014-06-23 15:19:30 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2014-06-25 15:38:40 +0200
commitef94b1d834aace7101de77c3a7c2631b9ae9c5f6 (patch)
tree6a69382441f2cf8d04a3b4150821aeb6728ff3fb /drivers/crypto/caam
parentcrypto: caam - Configuration for platforms with virtualization enabled in CAAM (diff)
downloadlinux-ef94b1d834aace7101de77c3a7c2631b9ae9c5f6.tar.xz
linux-ef94b1d834aace7101de77c3a7c2631b9ae9c5f6.zip
crypto: caam - Add definition of rd/wr_reg64 for little endian platform
CAAM IP has certain 64 bit registers . 32 bit architectures cannot force atomic-64 operations. This patch adds definition of these atomic-64 operations for little endian platforms. The definitions which existed previously were for big endian platforms. Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/caam')
-rw-r--r--drivers/crypto/caam/regs.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 69e3562dc7d1..f48e344ffc39 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -84,6 +84,7 @@
#endif
#ifndef CONFIG_64BIT
+#ifdef __BIG_ENDIAN
static inline void wr_reg64(u64 __iomem *reg, u64 data)
{
wr_reg32((u32 __iomem *)reg, (data & 0xffffffff00000000ull) >> 32);
@@ -95,6 +96,21 @@ static inline u64 rd_reg64(u64 __iomem *reg)
return (((u64)rd_reg32((u32 __iomem *)reg)) << 32) |
((u64)rd_reg32((u32 __iomem *)reg + 1));
}
+#else
+#ifdef __LITTLE_ENDIAN
+static inline void wr_reg64(u64 __iomem *reg, u64 data)
+{
+ wr_reg32((u32 __iomem *)reg + 1, (data & 0xffffffff00000000ull) >> 32);
+ wr_reg32((u32 __iomem *)reg, data & 0x00000000ffffffffull);
+}
+
+static inline u64 rd_reg64(u64 __iomem *reg)
+{
+ return (((u64)rd_reg32((u32 __iomem *)reg + 1)) << 32) |
+ ((u64)rd_reg32((u32 __iomem *)reg));
+}
+#endif
+#endif
#endif
/*