[dpdk-dev] [PATCH 05/12] Add prefetch operation for IBM Power architecture

[Chao Zhu <bjzhuc@cn.ibm.com>]

The prefetch operations implemented with assembly code in DPDK only
support x86. This patch add architecture specific prefetch operations
for IBM Power architecture.

Signed-off-by: Chao Zhu <bjzhuc@cn.ibm.com>
---
 .../include/powerpc/arch/rte_prefetch_arch.h       |   67 ++++++++++++++++++++
 1 files changed, 67 insertions(+), 0 deletions(-)
 create mode 100644 lib/librte_eal/common/include/powerpc/arch/rte_prefetch_arch.h

diff --git a/lib/librte_eal/common/include/powerpc/arch/rte_prefetch_arch.h b/lib/librte_eal/common/include/powerpc/arch/rte_prefetch_arch.h
new file mode 100644
index 0000000..32f18b4
--- /dev/null
+++ b/lib/librte_eal/common/include/powerpc/arch/rte_prefetch_arch.h
@@ -0,0 +1,67 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright (C) IBM Corporation 2014.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of IBM Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef _RTE_PREFETCH_ARCH_H_
+#define _RTE_PREFETCH_ARCH_H_
+
+/**
+ * Prefetch a cache line into all cache levels.
+ * @param p
+ *   Address to prefetch
+ */
+static inline void rte_arch_prefetch0(volatile void *p)
+{
+	asm volatile ("dcbt 0,%[p],1" : : [p] "r" (p));
+}
+
+/**
+ * Prefetch a cache line into all cache levels except the 0th cache level.
+ * @param p
+ *   Address to prefetch
+ */
+static inline void rte_arch_prefetch1(volatile void *p)
+{
+	asm volatile ("dcbt 0,%[p],1" : : [p] "r" (p));
+}
+
+/**
+ * Prefetch a cache line into all cache levels except the 0th and 1th cache
+ * levels.
+ * @param p
+ *   Address to prefetch
+ */
+static inline void rte_arch_prefetch2(volatile void *p)
+{
+	asm volatile ("dcbt 0,%[p],1" : : [p] "r" (p));
+}
+
+#endif /* _RTE_PREFETCH_ARCH_H_ */
-- 
1.7.1