1 files changed, 26 insertions, 0 deletions
diff --git a/src/include/ipxe/io.h b/src/include/ipxe/io.h
index 5bfd89987..b4d88fe89 100644
--- a/src/include/ipxe/io.h
+++ b/src/include/ipxe/io.h
@@ -503,4 +503,30 @@ void mb ( void );
 #define rmb()	mb()
 #define wmb()	mb()
 
+/** A usable memory region */
+struct memory_region {
+	/** Physical start address */
+	uint64_t start;
+	/** Physical end address */
+	uint64_t end;
+};
+
+/** Maximum number of memory regions we expect to encounter */
+#define MAX_MEMORY_REGIONS 8
+
+/** A memory map */
+struct memory_map {
+	/** Memory regions */
+	struct memory_region regions[MAX_MEMORY_REGIONS];
+	/** Number of used regions */
+	unsigned int count;
+};
+
+/**
+ * Get memory map
+ *
+ * @v memmap		Memory map to fill in
+ */
+void get_memmap ( struct memory_map *memmap );
+
 #endif /* _IPXE_IO_H */