shared/include/utility.h: New file.

1 files changed, 54 insertions, 0 deletions

diff --git a/c/src/lib/libcpu/shared/include/utility.h b/c/src/lib/libcpu/shared/include/utility.h
new file mode 100644
index 0000000000..caba9a2976
--- /dev/null
+++ b/c/src/lib/libcpu/shared/include/utility.h
@@ -0,0 +1,54 @@
+/**
+ * @file
+ *
+ * @brief Utility definitions and functions.
+ */
+
+/*
+ * Copyright (c) 2008
+ * Embedded Brains GmbH
+ * Obere Lagerstr. 30
+ * D-82178 Puchheim
+ * Germany
+ * rtems@embedded-brains.de
+ *
+ * The license and distribution terms for this file may be found in the file
+ * LICENSE in this distribution or at http://www.rtems.com/license/LICENSE.
+ */
+
+#ifndef LIBCPU_SHARED_UTILITY_H
+#define LIBCPU_SHARED_UTILITY_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define GET_REG_FIELD( reg, mask, shift) \
+  (((reg) & (mask)) >> (shift))
+
+#define SET_REG_FIELD( reg, val, mask, shift) \
+  (((reg) & ~(mask)) | (((val) << (shift)) & (mask)))
+
+#define REG_FLAG_IS_SET( reg, flag) \
+  (((reg) & (flag)) != 0)
+
+#define REG_FLAG_IS_CLEARED( reg, flag) \
+  (((reg) & (flag)) == 0)
+
+#define SET_REG_FLAG( reg, flag) \
+  ((reg) | (flag))
+
+#define CLEAR_REG_FLAG( reg, flag) \
+  ((reg) & ~(flag))
+
+#define SET_REG_FLAGS( reg, flags, mask) \
+  (((reg) & ~(mask)) | (flags))
+
+#define CLEAR_REG_FLAGS( reg, flags) \
+  ((reg) & ~(flags))
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBCPU_SHARED_UTILITY_H */