Index: kernel/arch/mips32/include/arch.h
===================================================================
--- kernel/arch/mips32/include/arch.h	(revision ba5cff5a50a646f50461d6b4517acf6c95de1152)
+++ kernel/arch/mips32/include/arch.h	(revision 3f69f63de2e129489498b2d6e5aab1cc110a9429)
@@ -44,4 +44,8 @@
 extern size_t cpu_count;
 
+#if defined(MACHINE_lmalta) || defined(MACHINE_bmalta)
+extern size_t sdram_size;
+#endif
+
 typedef struct {
 	void *addr;
@@ -51,4 +55,7 @@
 
 typedef struct {
+#if defined(MACHINE_lmalta) || defined(MACHINE_bmalta)
+	uint32_t sdram_size;
+#endif
 	uint32_t cpumap;
 	size_t cnt;