From: Vlastimil Kosar <ko...@rehivetech.com>
This patch adds architecture specific prefetch operations
for ARM architecture. It utilizes the pld instruction that
starts filling the appropriate cache line without blocking.
Signed-off-by: Vlastimil Kosar <kosar at rehivetech.com>
Signed-off-by: Jan Viktorin <viktorin at rehivetech.com>
---
.../common/include/arch/arm/rte_prefetch.h | 61 ++++++++++++++++++++++
1 file changed, 61 insertions(+)
create mode 100644 lib/librte_eal/common/include/arch/arm/rte_prefetch.h
diff --git a/lib/librte_eal/common/include/arch/arm/rte_prefetch.h
b/lib/librte_eal/common/include/arch/arm/rte_prefetch.h
new file mode 100644
index 0000000..8d75fe6
--- /dev/null
+++ b/lib/librte_eal/common/include/arch/arm/rte_prefetch.h
@@ -0,0 +1,61 @@
+/*
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 RehiveTech. All rights reserved.
+ *
+ * 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 RehiveTech 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_ARM_H_
+#define _RTE_PREFETCH_ARM_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "generic/rte_prefetch.h"
+
+static inline void rte_prefetch0(const volatile void *p)
+{
+ asm volatile ("pld [%[p]]" : : [p] "r" (p));
+}
+
+static inline void rte_prefetch1(const volatile void *p)
+{
+ asm volatile ("pld [%[p]]" : : [p] "r" (p));
+}
+
+static inline void rte_prefetch2(const volatile void *p)
+{
+ asm volatile ("pld [%[p]]" : : [p] "r" (p));
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_PREFETCH_ARM_H_ */
--
2.6.1
