1 files changed, 45 insertions, 0 deletions
diff --git a/src/include/ipxe/null_memmap.h b/src/include/ipxe/null_memmap.h
new file mode 100644
index 000000000..122280d14
--- /dev/null
+++ b/src/include/ipxe/null_memmap.h
@@ -0,0 +1,45 @@
+#ifndef _IPXE_NULL_MEMMAP_H
+#define _IPXE_NULL_MEMMAP_H
+
+#include <stdint.h>
+
+/** @file
+ *
+ * Null system memory map API
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+FILE_SECBOOT ( PERMITTED );
+
+#ifdef MEMMAP_NULL
+#define MEMMAP_PREFIX_null
+#else
+#define MEMMAP_PREFIX_null __null_
+#endif
+
+/**
+ * Describe memory region from system memory map
+ *
+ * @v min		Minimum address
+ * @v hide		Hide in-use regions from the memory map
+ * @v region		Region descriptor to fill in
+ */
+static inline __attribute__ (( always_inline )) void
+MEMMAP_INLINE ( null, memmap_describe ) ( uint64_t min, int hide __unused,
+					  struct memmap_region *region ) {
+
+	/* Initialise region as empty */
+	memmap_init ( min, region );
+}
+
+/**
+ * Synchronise in-use regions with the externally visible system memory map
+ *
+ */
+static inline __attribute__ (( always_inline )) void
+MEMMAP_INLINE ( null, memmap_sync ) ( void ) {
+	/* Nothing to do */
+}
+
+#endif /* _IPXE_NULL_MEMMAP_H */