3 files changed, 28 insertions, 0 deletions
diff --git a/include/apos/utils.h b/include/apos/utils.h
new file mode 100644
index 0000000..45e7194
--- /dev/null
+++ b/include/apos/utils.h
@@ -0,0 +1,14 @@
+#ifndef APOS_UTILS_H
+#define APOS_UTILS_H
+
+#define MAX(a, b) ((a) >= (b) ? (a) : (b))
+#define MAX3(a, b, c) (MAX(a, b) >= MAX(b, c) ? MAX(a, b) : MAX(b, c))
+#define MAX4(a, b, c, d) (MAX3(a, b, c) >= MAX3(b, c, d) ? MAX3(a, b, c) : MAX3(b, c, d))
+/* etc... */
+
+#define MIN(a, b) ((a) <= (b) ? (a) : (b))
+#define MIN3(a, b, c) (MIN(a, b) <= MIN(b, c) ? MIN(a, b) : MIN(b, c))
+#define MIN4(a, b, c, d) (MIN3(a, b, c) <= MIN3(b, c, d) ? MIN3(a, b, c) : MIN3(b, c, d))
+/* etc... */
+
+#endif /* APOS_UTILS_H */
diff --git a/include/fdt.h b/include/fdt.h
index 9236a45..f0b85e8 100644
--- a/include/fdt.h
+++ b/include/fdt.h
@@ -1 +1,4 @@
+#ifndef APOS_FDT_H
+#define APOS_FDT_H
 #include "../dtc/libfdt/fdt.h"
+#endif
diff --git a/include/libfdt.h b/include/libfdt.h
index 65b3ca6..d734715 100644
--- a/include/libfdt.h
+++ b/include/libfdt.h
@@ -1 +1,12 @@
+#ifndef APOS_LIBFDT_H
+#define APOS_LIBFDT_H
 #include "../dtc/libfdt/libfdt.h"
+
+#if defined(DEBUG)
+void __dbg_fdt(void *fdt, int node_offset, int depth);
+#define dbg_fdt(fdt) __dbg_fdt(fdt, 0, 0)
+#else
+#define dbg_fdt(...)
+#endif
+
+#endif