diff --git a/src/northbridge/intel/sandybridge/Makefile.inc b/src/northbridge/intel/sandybridge/Makefile.inc
index 2d68c03..90abe4d 100644
--- a/src/northbridge/intel/sandybridge/Makefile.inc
+++ b/src/northbridge/intel/sandybridge/Makefile.inc
@@ -28,11 +28,10 @@
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE_MRC) += raminit_mrc.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE_MRC) += raminit_mrc.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += raminit.c
-romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += romstage.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += ../../../device/dram/ddr3.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += raminit.c
-romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += romstage.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += ../../../device/dram/ddr3.c
+romstage-y += romstage.c
 romstage-y += mrccache.c
 romstage-y += iommu.c
 romstage-y += early_init.c
diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c
index aae963e..7490ff7 100644
--- a/src/northbridge/intel/sandybridge/raminit.c
+++ b/src/northbridge/intel/sandybridge/raminit.c
@@ -24,12 +24,14 @@
 #include <cbfs.h>
 #include <halt.h>
 #include <ip_checksum.h>
+#include <timestamp.h>
 #include <pc80/mc146818rtc.h>
 #include <device/pci_def.h>
 #include "raminit_native.h"
 #include "sandybridge.h"
 #include <delay.h>
 #include <lib.h>
+#include <device/device.h>
 
 /* Management Engine is in the southbridge */
 #include "southbridge/intel/bd82x6x/me.h"
@@ -37,6 +39,7 @@
 #include "southbridge/intel/bd82x6x/smbus.h"
 #include "arch/cpu.h"
 #include "cpu/x86/msr.h"
+#include <northbridge/intel/sandybridge/chip.h>
 
 /* FIXME: no ECC support.  */
 /* FIXME: no support for 3-channel chipsets.  */
@@ -4034,3 +4037,44 @@
 		halt();
 	}
 }
+
+#define HOST_BRIDGE	PCI_DEVFN(0, 0)
+#define DEFAULT_TCK	TCK_800MHZ
+
+static unsigned int get_mem_min_tck(void)
+{
+	const struct device *dev;
+	const struct northbridge_intel_sandybridge_config *cfg;
+
+	dev = dev_find_slot(0, HOST_BRIDGE);
+	if (!(dev && dev->chip_info))
+		return DEFAULT_TCK;
+
+	cfg = dev->chip_info;
+
+	/* If this is zero, it just means devicetree.cb didn't set it */
+	if (cfg->max_mem_clock_mhz == 0)
+		return DEFAULT_TCK;
+
+	if (cfg->max_mem_clock_mhz >= 800)
+		return TCK_800MHZ;
+	else if (cfg->max_mem_clock_mhz >= 666)
+		return TCK_666MHZ;
+	else if (cfg->max_mem_clock_mhz >= 533)
+		return TCK_533MHZ;
+	return TCK_400MHZ;
+}
+
+void perform_raminit(int s3resume)
+{
+	spd_raw_data spd[4];
+
+	post_code(0x3a);
+
+	memset (spd, 0, sizeof (spd));
+	mainboard_get_spd(spd);
+
+	timestamp_add_now(TS_BEFORE_INITRAM);
+
+	init_dram_ddr3(spd, 1, get_mem_min_tck(), s3resume);
+}
diff --git a/src/northbridge/intel/sandybridge/raminit.h b/src/northbridge/intel/sandybridge/raminit.h
index 5bda2ef..4e684ec 100644
--- a/src/northbridge/intel/sandybridge/raminit.h
+++ b/src/northbridge/intel/sandybridge/raminit.h
@@ -27,6 +27,7 @@
 
 void sdram_initialize(struct pei_data *pei_data);
 void save_mrc_data(struct pei_data *pei_data);
+void mainboard_fill_pei_data(struct pei_data *pei_data);
 int fixup_sandybridge_errata(void);
 
 #endif				/* RAMINIT_H */
diff --git a/src/northbridge/intel/sandybridge/raminit_mrc.c b/src/northbridge/intel/sandybridge/raminit_mrc.c
index a370ecc..162caf6 100644
--- a/src/northbridge/intel/sandybridge/raminit_mrc.c
+++ b/src/northbridge/intel/sandybridge/raminit_mrc.c
@@ -25,6 +25,7 @@
 #include <pc80/mc146818rtc.h>
 #include <device/pci_def.h>
 #include <halt.h>
+#include <timestamp.h>
 #include "raminit.h"
 #include "pei_data.h"
 #include "sandybridge.h"
@@ -279,3 +280,29 @@
 
 	report_memory_config();
 }
+
+void perform_raminit(int s3resume)
+{
+	int cbmem_was_initted;
+	struct pei_data pei_data;
+
+	/* Prepare USB controller early in S3 resume */
+	if (!mainboard_should_reset_usb(s3resume))
+		enable_usb_bar();
+
+	mainboard_fill_pei_data(&pei_data);
+
+	post_code(0x3a);
+	pei_data.boot_mode = s3resume ? 2 : 0;
+	timestamp_add_now(TS_BEFORE_INITRAM);
+	sdram_initialize(&pei_data);
+	cbmem_was_initted = !cbmem_recovery(s3resume);
+	if (!s3resume)
+		save_mrc_data(&pei_data);
+
+	if (s3resume && !cbmem_was_initted) {
+		/* Failed S3 resume, reset to come up cleanly */
+		outb(0x6, 0xcf9);
+		halt();
+	}
+}
diff --git a/src/northbridge/intel/sandybridge/raminit_native.h b/src/northbridge/intel/sandybridge/raminit_native.h
index b41aa85..8f8d057 100644
--- a/src/northbridge/intel/sandybridge/raminit_native.h
+++ b/src/northbridge/intel/sandybridge/raminit_native.h
@@ -13,17 +13,15 @@
  * GNU General Public License for more details.
  */
 
-#ifndef RAMINIT_H
-#define RAMINIT_H
+#ifndef RAMINIT_NATIVE_H
+#define RAMINIT_NATIVE_H
 
+#include "sandybridge.h"
 #include <device/dram/ddr3.h>
 
 /* The order is ch0dimmA, ch0dimmB, ch1dimmA, ch1dimmB.  */
 void init_dram_ddr3(spd_raw_data *spds, int mobile, int min_tck, int s3resume);
 void read_spd(spd_raw_data *spd, u8 addr);
 void mainboard_get_spd(spd_raw_data *spd);
-void rcba_config(void);
-void pch_enable_lpc(void);
-void mainboard_early_init(int s3resume);
 
 #endif				/* RAMINIT_H */
diff --git a/src/northbridge/intel/sandybridge/romstage.c b/src/northbridge/intel/sandybridge/romstage.c
index 3d05f8e..04db608 100644
--- a/src/northbridge/intel/sandybridge/romstage.c
+++ b/src/northbridge/intel/sandybridge/romstage.c
@@ -29,43 +29,23 @@
 #include <device/device.h>
 #include <halt.h>
 #include <tpm.h>
-#include "raminit_native.h"
 #include <northbridge/intel/sandybridge/chip.h>
 #include "southbridge/intel/bd82x6x/pch.h"
 #include "southbridge/intel/bd82x6x/gpio.h"
 
-#define HOST_BRIDGE	PCI_DEVFN(0, 0)
-#define DEFAULT_TCK	TCK_800MHZ
-
-static unsigned int get_mem_min_tck(void)
+static void early_pch_init(void)
 {
-	const struct device *dev;
-	const struct northbridge_intel_sandybridge_config *cfg;
+	u8 reg8;
 
-	dev = dev_find_slot(0, HOST_BRIDGE);
-	if (!(dev && dev->chip_info))
-		return DEFAULT_TCK;
-
-	cfg = dev->chip_info;
-
-	/* If this is zero, it just means devicetree.cb didn't set it */
-	if (cfg->max_mem_clock_mhz == 0)
-		return DEFAULT_TCK;
-
-	if (cfg->max_mem_clock_mhz >= 800)
-		return TCK_800MHZ;
-	else if (cfg->max_mem_clock_mhz >= 666)
-		return TCK_666MHZ;
-	else if (cfg->max_mem_clock_mhz >= 533)
-		return TCK_533MHZ;
-	else
-		return TCK_400MHZ;
+	// reset rtc power status
+	reg8 = pci_read_config8(PCH_LPC_DEV, 0xa4);
+	reg8 &= ~(1 << 2);
+	pci_write_config8(PCH_LPC_DEV, 0xa4, reg8);
 }
 
 void main(unsigned long bist)
 {
 	int s3resume = 0;
-	spd_raw_data spd[4];
 
 	if (MCHBAR16(SSKPD) == 0xCAFE) {
 		outb(0x6, 0xcf9);
@@ -86,7 +66,14 @@
 
 	setup_pch_gpios(&mainboard_gpio_map);
 
-	early_usb_init(mainboard_usb_ports);
+	/* Initialize superio */
+	mainboard_config_superio();
+
+	/* USB is inited in MRC if MRC is used.  */
+	if (!(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE_MRC
+	      || CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE_MRC)) {
+		early_usb_init(mainboard_usb_ports);
+	}
 
 	/* Initialize console device(s) */
 	console_init();
@@ -111,27 +98,25 @@
 
 	post_code(0x39);
 
-	post_code(0x3a);
-
-	memset (spd, 0, sizeof (spd));
-	mainboard_get_spd(spd);
-
-	timestamp_add_now(TS_BEFORE_INITRAM);
-
-	init_dram_ddr3(spd, 1, get_mem_min_tck(), s3resume);
+	perform_raminit(s3resume);
 
 	timestamp_add_now(TS_AFTER_INITRAM);
+
+	post_code(0x3b);
+	/* Perform some initialization that must run before stage2 */
+	early_pch_init();
 	post_code(0x3c);
 
 	southbridge_configure_default_intmap();
 	rcba_config();
+
 	post_code(0x3d);
 
 	northbridge_romstage_finalize(s3resume);
 
-#if CONFIG_LPC_TPM
-       init_tpm(s3resume);
-#endif
+	if (CONFIG_LPC_TPM) {
+		init_tpm(s3resume);
+	}
 
 	post_code(0x3f);
 }
diff --git a/src/northbridge/intel/sandybridge/sandybridge.h b/src/northbridge/intel/sandybridge/sandybridge.h
index 0a1f20a..570e1f7 100644
--- a/src/northbridge/intel/sandybridge/sandybridge.h
+++ b/src/northbridge/intel/sandybridge/sandybridge.h
@@ -215,8 +215,16 @@
 void dump_spd_registers(void);
 void dump_mem(unsigned start, unsigned end);
 void report_platform_info(void);
+
 #endif /* !__SMM__ */
 
+void rcba_config(void);
+void pch_enable_lpc(void);
+void mainboard_early_init(int s3resume);
+void mainboard_config_superio(void);
+int mainboard_should_reset_usb(int s3resume);
+void perform_raminit(int s3resume);
+
 #if ENV_RAMSTAGE
 #include <device/device.h>