diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index 146a4b0..30dbdca 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -224,9 +224,9 @@
  * @mc:		configuration table header address
  * @return:	configuration table end address
  */
-static inline u32 mp_next_mpc_entry(struct mp_config_table *mc)
+static inline ulong mp_next_mpc_entry(struct mp_config_table *mc)
 {
-	return (u32)mc + mc->mpc_length;
+	return (ulong)mc + mc->mpc_length;
 }
 
 /**
@@ -254,9 +254,9 @@
  * @mc:		configuration table header address
  * @return:	configuration table end address
  */
-static inline u32 mp_next_mpe_entry(struct mp_config_table *mc)
+static inline ulong mp_next_mpe_entry(struct mp_config_table *mc)
 {
-	return (u32)mc + mc->mpc_length + mc->mpe_length;
+	return (ulong)mc + mc->mpc_length + mc->mpe_length;
 }
 
 /**
diff --git a/arch/x86/lib/mpspec.c b/arch/x86/lib/mpspec.c
index 516d7b3..17e977c 100644
--- a/arch/x86/lib/mpspec.c
+++ b/arch/x86/lib/mpspec.c
@@ -25,10 +25,10 @@
 
 struct mp_config_table *mp_write_floating_table(struct mp_floating_table *mf)
 {
-	u32 mc;
+	ulong mc;
 
 	memcpy(mf->mpf_signature, MPF_SIGNATURE, 4);
-	mf->mpf_physptr = (u32)mf + sizeof(struct mp_floating_table);
+	mf->mpf_physptr = (ulong)mf + sizeof(struct mp_floating_table);
 	mf->mpf_length = 1;
 	mf->mpf_spec = MPSPEC_V14;
 	mf->mpf_checksum = 0;
@@ -41,7 +41,7 @@
 	mf->mpf_feature5 = 0;
 	mf->mpf_checksum = table_compute_checksum(mf, mf->mpf_length * 16);
 
-	mc = (u32)mf + sizeof(struct mp_floating_table);
+	mc = (ulong)mf + sizeof(struct mp_floating_table);
 	return (struct mp_config_table *)mc;
 }
 
@@ -219,14 +219,14 @@
 
 u32 mptable_finalize(struct mp_config_table *mc)
 {
-	u32 end;
+	ulong end;
 
 	mc->mpe_checksum = table_compute_checksum((void *)mp_next_mpc_entry(mc),
 						  mc->mpe_length);
 	mc->mpc_checksum = table_compute_checksum(mc, mc->mpc_length);
 	end = mp_next_mpe_entry(mc);
 
-	debug("Write the MP table at: %x - %x\n", (u32)mc, end);
+	debug("Write the MP table at: %lx - %lx\n", (ulong)mc, end);
 
 	return end;
 }
@@ -371,7 +371,7 @@
 	int ioapic_id, ioapic_ver;
 	int bus_isa = 0xff;
 	int ret;
-	u32 end;
+	ulong end;
 
 	/* 16 byte align the table address */
 	addr = ALIGN(addr, 16);