1 files changed, 51 insertions, 0 deletions
diff --git a/src/commonlib/include/commonlib/helpers.h b/src/commonlib/include/commonlib/helpers.h
new file mode 100644
index 0000000000..6ad767e219
--- /dev/null
+++ b/src/commonlib/include/commonlib/helpers.h
@@ -0,0 +1,51 @@
+#ifndef COMMONLIB_HELPERS_H
+#define COMMONLIB_HELPERS_H
+/* This file is for helpers for both coreboot firmware and its utilities. */
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+
+#define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1UL)
+#define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
+#define ALIGN_UP(x,a)           ALIGN((x),(a))
+#define ALIGN_DOWN(x,a)         ((x) & ~((typeof(x))(a)-1UL))
+#define IS_ALIGNED(x,a)         (((x) & ((typeof(x))(a)-1UL)) == 0)
+
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define MAX(a,b) ((a) > (b) ? (a) : (b))
+#define ABS(a) (((a) < 0) ? (-(a)) : (a))
+#define CEIL_DIV(a, b)  (((a) + (b) - 1) / (b))
+#define IS_POWER_OF_2(x)  (((x) & ((x) - 1)) == 0)
+
+/* Standard units. */
+#define KiB (1<<10)
+#define MiB (1<<20)
+#define GiB (1<<30)
+/* Could we ever run into this one? I hope we get this much memory! */
+#define TiB (1<<40)
+
+#define KHz (1000)
+#define MHz (1000 * KHz)
+#define GHz (1000 * MHz)
+
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+#if !defined(__clang__)
+#define check_member(structure, member, offset) _Static_assert( \
+	offsetof(struct structure, member) == offset, \
+	"`struct " #structure "` offset for `" #member "` is not " #offset )
+#else
+#define check_member(structure, member, offset)
+#endif
+
+/**
+ * container_of - cast a member of a structure out to the containing structure
+ * @param ptr:    the pointer to the member.
+ * @param type:   the type of the container struct this is embedded in.
+ * @param member: the name of the member within the struct.
+ *
+ */
+#define container_of(ptr, type, member) ({			\
+	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
+	(type *)( (char *)__mptr - offsetof(type,member) );})
+
+#endif /* COMMONLIB_HELPERS_H */