4 files changed, 177 insertions, 0 deletions
diff --git a/libtransport/includes/hicn/transport/portability/CMakeLists.txt b/libtransport/includes/hicn/transport/portability/CMakeLists.txt
index 7a688b1f1..d29ec737c 100644
--- a/libtransport/includes/hicn/transport/portability/CMakeLists.txt
+++ b/libtransport/includes/hicn/transport/portability/CMakeLists.txt
@@ -15,6 +15,8 @@ list(APPEND HEADER_FILES
   ${CMAKE_CURRENT_SOURCE_DIR}/c_portability.h
   ${CMAKE_CURRENT_SOURCE_DIR}/portability.h
   ${CMAKE_CURRENT_SOURCE_DIR}/cpu.h
+  ${CMAKE_CURRENT_SOURCE_DIR}/cache.h
+  ${CMAKE_CURRENT_SOURCE_DIR}/endianess.h
 )
 
 list(APPEND SOURCE_FILES
diff --git a/libtransport/includes/hicn/transport/portability/cache.h b/libtransport/includes/hicn/transport/portability/cache.h
new file mode 100644
index 000000000..ae113c7d6
--- /dev/null
+++ b/libtransport/includes/hicn/transport/portability/cache.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2022 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <hicn/transport/portability/platform.h>
+
+namespace transport {
+namespace portability {
+namespace cache {
+
+/**
+ * @Prefetch utilities
+ */
+
+/* Default cache line size of 64 bytes. */
+#ifndef LOG2_CACHE_LINE_BYTES
+static constexpr const std::size_t klog2_cache_line_bytes = 6;
+#else
+static constexpr const std::size_t klog2_cache_line_bytes =
+    LOG2_CACHE_LINE_BYTES;
+#endif
+
+/* How much data prefetch instruction prefetches */
+#ifndef LOG2_CACHE_PREFETCH_BYTES
+static constexpr const std::size_t klog2_cache_prefetch_bytes =
+    klog2_cache_line_bytes;
+#else
+static constexpr const std::size_t klog2_cache_prefetch_bytes =
+    LOG2_CACHE_PREFETCH_BYTES;
+#endif
+
+/* Default cache line fill buffers. */
+#ifndef N_PREFETCHES
+static constexpr const std::size_t kn_prefetches = 16;
+#else
+static constexpr const std::size_t kn_prefetches = N_PREFETCHES;
+#endif
+
+static constexpr const std::size_t kcache_line_bytes =
+    (1 << klog2_cache_line_bytes);
+static constexpr const std::size_t kcache_prefetch_bytes =
+    (1 << klog2_cache_prefetch_bytes);
+
+static constexpr const int READ = 0;
+static constexpr const int LOAD = 0; /* alias for read */
+static constexpr const int WRITE = 1;
+static constexpr const int STORE = 1; /* alias for write */
+
+#if defined(__GNUC__) || defined(__clang__)
+// Clang & GCC
+
+template <int type>
+static inline void _prefetch(uint8_t *addr, std::size_t n, std::size_t size) {
+  if (size > n * kcache_prefetch_bytes) {
+    __builtin_prefetch(addr + n * kcache_prefetch_bytes, type,
+                       /* locality */ 3);
+  }
+}
+
+template <typename T, int type>
+static inline void prefetch(T *addr, std::size_t size) {
+  uint8_t *_addr = reinterpret_cast<uint8_t *>(addr);
+
+  _prefetch<type>(_addr, 0, size);
+  _prefetch<type>(_addr, 1, size);
+  _prefetch<type>(_addr, 2, size);
+  _prefetch<type>(_addr, 3, size);
+}
+#endif
+
+}  // namespace cache
+}  // namespace portability
+}  // namespace transport
+\ No newline at end of file
diff --git a/libtransport/includes/hicn/transport/portability/endianess.h b/libtransport/includes/hicn/transport/portability/endianess.h
new file mode 100644
index 000000000..c18ac82cf
--- /dev/null
+++ b/libtransport/includes/hicn/transport/portability/endianess.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2022 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <hicn/transport/errors/errors.h>
+
+namespace transport {
+namespace portability {
+
+#if (__BYTE_ORDER__) == (__ORDER_LITTLE_ENDIAN__)
+static constexpr const bool kIsBigEndian = false;
+static constexpr const bool kIsLittleEndian = true;
+#else
+static constexpr const bool kIsBigEndian = true;
+static constexpr const bool kIsLittleEndian = false;
+#endif
+
+template <typename T>
+inline T bswap(T value) {
+  throw errors::RuntimeException("Not implemented");
+}
+
+template <>
+inline int16_t bswap(int16_t value) {
+  return __builtin_bswap16(value);
+}
+
+template <>
+inline int32_t bswap(int32_t value) {
+  return __builtin_bswap32(value);
+}
+
+template <>
+inline int64_t bswap(int64_t value) {
+  return __builtin_bswap64(value);
+}
+
+template <>
+inline uint16_t bswap(uint16_t value) {
+  return __builtin_bswap16(value);
+}
+
+template <>
+inline uint32_t bswap(uint32_t value) {
+  return __builtin_bswap32(value);
+}
+
+template <>
+inline uint64_t bswap(uint64_t value) {
+  return __builtin_bswap64(value);
+}
+
+template <typename T>
+inline T host_to_net(T value) {
+  if constexpr (kIsLittleEndian) {
+    return bswap(value);
+  }
+
+  return value;
+}
+
+template <typename T>
+inline T net_to_host(T value) {
+  if constexpr (kIsLittleEndian) {
+    return bswap(value);
+  }
+
+  return value;
+}
+
+}  // namespace portability
+}  // namespace transport
+\ No newline at end of file
diff --git a/libtransport/includes/hicn/transport/portability/portability.h b/libtransport/includes/hicn/transport/portability/portability.h
index b093f8892..fd6eca4de 100644
--- a/libtransport/includes/hicn/transport/portability/portability.h
+++ b/libtransport/includes/hicn/transport/portability/portability.h
@@ -26,6 +26,7 @@
 
 #include <cstddef>
 
+namespace transport {
 namespace portability {
 
 // Generalize warning push/pop.
@@ -66,3 +67,4 @@ namespace portability {
 #endif
 
 }  // namespace portability
+}  // namespace transport
+\ No newline at end of file