diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h
index 21bc633..351f021 100644
--- a/arch/x86/include/asm/e820.h
+++ b/arch/x86/include/asm/e820.h
@@ -23,4 +23,7 @@ struct e820entry {
 
 #endif /* __ASSEMBLY__ */
 
+/* Implementation defined function to install an e820 map */
+unsigned install_e820_map(unsigned max_entries, struct e820entry *);
+
 #endif /* _ASM_X86_E820_H */
diff --git a/arch/x86/include/asm/zimage.h b/arch/x86/include/asm/zimage.h
index bf351ed..94fa2a7 100644
--- a/arch/x86/include/asm/zimage.h
+++ b/arch/x86/include/asm/zimage.h
@@ -31,9 +31,6 @@
 #define BZIMAGE_LOAD_ADDR  0x100000
 #define ZIMAGE_LOAD_ADDR   0x10000
 
-/* Implementation defined function to install an e820 map. */
-unsigned install_e820_map(unsigned max_entries, struct e820entry *);
-
 struct boot_params *load_zimage(char *image, unsigned long kernel_size,
 				ulong *load_addressp);
 int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 6ecd6db..169062e 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_CMD_BOOTM) += bootm.o
 obj-y	+= cmd_boot.o
 obj-$(CONFIG_HAVE_FSP) += cmd_hob.o
 obj-$(CONFIG_EFI) += efi/
+obj-y	+= e820.o
 obj-y	+= gcc.o
 obj-y	+= init_helpers.o
 obj-y	+= interrupts.o
diff --git a/arch/x86/lib/e820.c b/arch/x86/lib/e820.c
new file mode 100644
index 0000000..5babfde
--- /dev/null
+++ b/arch/x86/lib/e820.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/e820.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Install a default e820 table with 4 entries as follows:
+ *
+ *	0x000000-0x0a0000	Useable RAM
+ *	0x0a0000-0x100000	Reserved for ISA
+ *	0x100000-gd->ram_size	Useable RAM
+ *	CONFIG_PCIE_ECAM_BASE	PCIe ECAM
+ */
+__weak unsigned install_e820_map(unsigned max_entries,
+				 struct e820entry *entries)
+{
+	entries[0].addr = 0;
+	entries[0].size = ISA_START_ADDRESS;
+	entries[0].type = E820_RAM;
+	entries[1].addr = ISA_START_ADDRESS;
+	entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS;
+	entries[1].type = E820_RESERVED;
+	entries[2].addr = ISA_END_ADDRESS;
+	entries[2].size = gd->ram_size - ISA_END_ADDRESS;
+	entries[2].type = E820_RAM;
+	entries[3].addr = CONFIG_PCIE_ECAM_BASE;
+	entries[3].size = CONFIG_PCIE_ECAM_SIZE;
+	entries[3].type = E820_RESERVED;
+
+	return 4;
+}
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index a1ec57e..1b33c77 100644
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -42,32 +42,6 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define COMMAND_LINE_SIZE	2048
 
-/*
- * Install a default e820 table with 3 entries as follows:
- *
- *	0x000000-0x0a0000	Useable RAM
- *	0x0a0000-0x100000	Reserved for ISA
- *	0x100000-gd->ram_size	Useable RAM
- */
-__weak unsigned install_e820_map(unsigned max_entries,
-				 struct e820entry *entries)
-{
-	entries[0].addr = 0;
-	entries[0].size = ISA_START_ADDRESS;
-	entries[0].type = E820_RAM;
-	entries[1].addr = ISA_START_ADDRESS;
-	entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS;
-	entries[1].type = E820_RESERVED;
-	entries[2].addr = ISA_END_ADDRESS;
-	entries[2].size = gd->ram_size - ISA_END_ADDRESS;
-	entries[2].type = E820_RAM;
-	entries[3].addr = CONFIG_PCIE_ECAM_BASE;
-	entries[3].size = CONFIG_PCIE_ECAM_SIZE;
-	entries[3].type = E820_RESERVED;
-
-	return 4;
-}
-
 static void build_command_line(char *command_line, int auto_boot)
 {
 	char *env_command_line;