diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index 2d9028f1474c..b394552e5ca0 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -642,14 +642,6 @@ void __init plat_mem_setup(void)
 
 	total = 0;
 
-	/* First add the init memory we will be returning.  */
-	memory = __pa_symbol(&__init_begin) & PAGE_MASK;
-	mem_alloc_size = (__pa_symbol(&__init_end) & PAGE_MASK) - memory;
-	if (mem_alloc_size > 0) {
-		add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM);
-		total += mem_alloc_size;
-	}
-
 	/*
 	 * The Mips memory init uses the first memory location for
 	 * some memory vectors. When SPARSEMEM is in use, it doesn't
diff --git a/arch/mips/include/asm/bootinfo.h b/arch/mips/include/asm/bootinfo.h
index 35cd1bab69c3..7a51d879e6ca 100644
--- a/arch/mips/include/asm/bootinfo.h
+++ b/arch/mips/include/asm/bootinfo.h
@@ -86,6 +86,7 @@ extern unsigned long mips_machtype;
 #define BOOT_MEM_RAM		1
 #define BOOT_MEM_ROM_DATA	2
 #define BOOT_MEM_RESERVED	3
+#define BOOT_MEM_INIT_RAM	4
 
 /*
  * A memory map that's built upon what was determined
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 84af26ab2212..e86c2cf554aa 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -121,6 +121,9 @@ static void __init print_memory_map(void)
 		case BOOT_MEM_RAM:
 			printk(KERN_CONT "(usable)\n");
 			break;
+		case BOOT_MEM_INIT_RAM:
+			printk(KERN_CONT "(usable after init)\n");
+			break;
 		case BOOT_MEM_ROM_DATA:
 			printk(KERN_CONT "(ROM data)\n");
 			break;
@@ -361,15 +364,24 @@ static void __init bootmem_init(void)
 	for (i = 0; i < boot_mem_map.nr_map; i++) {
 		unsigned long start, end, size;
 
-		/*
-		 * Reserve usable memory.
-		 */
-		if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
-			continue;
-
 		start = PFN_UP(boot_mem_map.map[i].addr);
 		end   = PFN_DOWN(boot_mem_map.map[i].addr
 				    + boot_mem_map.map[i].size);
+
+		/*
+		 * Reserve usable memory.
+		 */
+		switch (boot_mem_map.map[i].type) {
+		case BOOT_MEM_RAM:
+			break;
+		case BOOT_MEM_INIT_RAM:
+			memory_present(0, start, end);
+			continue;
+		default:
+			/* Not usable memory */
+			continue;
+		}
+
 		/*
 		 * We are rounding up the start address of usable memory
 		 * and at the end of the usable range downwards.
@@ -455,11 +467,33 @@ early_param("mem", early_parse_mem);
 
 static void __init arch_mem_init(char **cmdline_p)
 {
+	phys_t init_mem, init_end, init_size;
+
 	extern void plat_mem_setup(void);
 
 	/* call board setup routine */
 	plat_mem_setup();
 
+	init_mem = PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT;
+	init_end = PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT;
+	init_size = init_end - init_mem;
+	if (init_size) {
+		/* Make sure it is in the boot_mem_map */
+		int i, found;
+		found = 0;
+		for (i = 0; i < boot_mem_map.nr_map; i++) {
+			if (init_mem >= boot_mem_map.map[i].addr &&
+			    init_mem < (boot_mem_map.map[i].addr +
+					boot_mem_map.map[i].size)) {
+				found = 1;
+				break;
+			}
+		}
+		if (!found)
+			add_memory_region(init_mem, init_size,
+					  BOOT_MEM_INIT_RAM);
+	}
+
 	pr_info("Determined physical RAM map:\n");
 	print_memory_map();
 
@@ -523,6 +557,7 @@ static void __init resource_init(void)
 		res = alloc_bootmem(sizeof(struct resource));
 		switch (boot_mem_map.map[i].type) {
 		case BOOT_MEM_RAM:
+		case BOOT_MEM_INIT_RAM:
 		case BOOT_MEM_ROM_DATA:
 			res->name = "System RAM";
 			break;
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index b7ebc4fa89bc..3b3ffd439cd7 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -304,9 +304,14 @@ int page_is_ram(unsigned long pagenr)
 	for (i = 0; i < boot_mem_map.nr_map; i++) {
 		unsigned long addr, end;
 
-		if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
+		switch (boot_mem_map.map[i].type) {
+		case BOOT_MEM_RAM:
+		case BOOT_MEM_INIT_RAM:
+			break;
+		default:
 			/* not usable memory */
 			continue;
+		}
 
 		addr = PFN_UP(boot_mem_map.map[i].addr);
 		end = PFN_DOWN(boot_mem_map.map[i].addr +
@@ -379,7 +384,7 @@ void __init mem_init(void)
 
 	reservedpages = ram = 0;
 	for (tmp = 0; tmp < max_low_pfn; tmp++)
-		if (page_is_ram(tmp)) {
+		if (page_is_ram(tmp) && pfn_valid(tmp)) {
 			ram++;
 			if (PageReserved(pfn_to_page(tmp)))
 				reservedpages++;