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Message-ID: <alpine.DEB.2.02.1405021528220.19827@tomh.mtv.corp.google.com>
Date: Fri, 2 May 2014 16:28:54 -0700 (PDT)
From: Tom Herbert <therbert@...gle.com>
To: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 4/8 v4] sparc: csum_add for Sparc
>From David Miller, add arch support for csum_add for 32 and 64 bit
versions.
Signed-off-by: Tom Herbert <therbert@...gle.com>
---
arch/sparc/include/asm/checksum_32.h | 12 ++++++++++++
arch/sparc/include/asm/checksum_64.h | 12 ++++++++++++
2 files changed, 24 insertions(+)
diff --git a/arch/sparc/include/asm/checksum_32.h b/arch/sparc/include/asm/checksum_32.h
index bdbda14..04471dc 100644
--- a/arch/sparc/include/asm/checksum_32.h
+++ b/arch/sparc/include/asm/checksum_32.h
@@ -238,4 +238,16 @@ static inline __sum16 ip_compute_csum(const void *buff, int len)
return csum_fold(csum_partial(buff, len, 0));
}
+#define HAVE_ARCH_CSUM_ADD
+static inline __wsum csum_add(__wsum csum, __wsum addend)
+{
+ __asm__ __volatile__(
+ "addcc %0, %1, %0\n"
+ "addx %0, %%g0, %0"
+ : "=r" (csum)
+ : "r" (addend), "0" (csum));
+
+ return csum;
+}
+
#endif /* !(__SPARC_CHECKSUM_H) */
diff --git a/arch/sparc/include/asm/checksum_64.h b/arch/sparc/include/asm/checksum_64.h
index 019b961..2ff81ae 100644
--- a/arch/sparc/include/asm/checksum_64.h
+++ b/arch/sparc/include/asm/checksum_64.h
@@ -164,4 +164,16 @@ static inline __sum16 ip_compute_csum(const void *buff, int len)
return csum_fold(csum_partial(buff, len, 0));
}
+#define HAVE_ARCH_CSUM_ADD
+static inline __wsum csum_add(__wsum csum, __wsum addend)
+{
+ __asm__ __volatile__(
+ "addcc %0, %1, %0\n"
+ "addx %0, %%g0, %0"
+ : "=r" (csum)
+ : "r" (addend), "0" (csum));
+
+ return csum;
+}
+
#endif /* !(__SPARC64_CHECKSUM_H) */
--
1.9.1.423.g4596e3a
--
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