nb/intel/sandybridge/raminit: Separate Sandybridge and Ivybridge

Add custom files for Sandybridge and IvyBridge functions.
Move only the minimal required functions into separate files.
Both files' functions are going to call raminit_common functions.
No functionality is changed.

Sandybridge code path tested on Lenovo T420.

Change-Id: I1b1dfbd0857b59d3ae4392b73c033ee7a5aed243
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/17605
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

5 files changed, 1053 insertions, 487 deletions

diff --git a/src/northbridge/intel/sandybridge/Makefile.inc b/src/northbridge/intel/sandybridge/Makefile.inc
index cc0228bf79..a40fa157ef 100644
--- a/src/northbridge/intel/sandybridge/Makefile.inc
+++ b/src/northbridge/intel/sandybridge/Makefile.inc
@@ -27,6 +27,8 @@ romstage-y += ram_calc.c
 ifeq ($(CONFIG_USE_NATIVE_RAMINIT),y)
 romstage-y += raminit.c
 romstage-y += raminit_common.c
+romstage-y += raminit_sandy.c
+romstage-y += raminit_ivy.c
 romstage-y += ../../../device/dram/ddr3.c
 else
 romstage-y += raminit_mrc.c
diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c
index 4d18c0b6b7..2bb43ce8da 100644
--- a/src/northbridge/intel/sandybridge/raminit.c
+++ b/src/northbridge/intel/sandybridge/raminit.c
@@ -277,377 +277,6 @@ static void dram_find_spds_ddr3(spd_raw_data *spd, ramctr_timing *ctrl)
 		die("No DIMMs were found");
 }
 
-/* Frequency multiplier.  */
-static u32 get_FRQ(u32 tCK)
-{
-	u32 FRQ;
-	FRQ = 256000 / (tCK * BASEFREQ);
-	if (FRQ > 8)
-		return 8;
-	if (FRQ < 3)
-		return 3;
-	return FRQ;
-}
-
-static u32 get_REFI(u32 tCK)
-{
-	/* Get REFI based on MCU frequency using the following rule:
-	 *        _________________________________________
-	 * FRQ : | 3    | 4    | 5    | 6    | 7    | 8    |
-	 * REFI: | 3120 | 4160 | 5200 | 6240 | 7280 | 8320 |
-	 */
-	static const u32 frq_refi_map[] =
-	    { 3120, 4160, 5200, 6240, 7280, 8320 };
-	return frq_refi_map[get_FRQ(tCK) - 3];
-}
-
-static u8 get_XSOffset(u32 tCK)
-{
-	/* Get XSOffset based on MCU frequency using the following rule:
-	 *             _________________________
-	 * FRQ      : | 3 | 4 | 5 | 6 | 7  | 8  |
-	 * XSOffset : | 4 | 6 | 7 | 8 | 10 | 11 |
-	 */
-	static const u8 frq_xs_map[] = { 4, 6, 7, 8, 10, 11 };
-	return frq_xs_map[get_FRQ(tCK) - 3];
-}
-
-static u8 get_MOD(u32 tCK)
-{
-	/* Get MOD based on MCU frequency using the following rule:
-	 *        _____________________________
-	 * FRQ : | 3  | 4  | 5  | 6  | 7  | 8  |
-	 * MOD : | 12 | 12 | 12 | 12 | 15 | 16 |
-	 */
-	static const u8 frq_mod_map[] = { 12, 12, 12, 12, 15, 16 };
-	return frq_mod_map[get_FRQ(tCK) - 3];
-}
-
-static u8 get_WLO(u32 tCK)
-{
-	/* Get WLO based on MCU frequency using the following rule:
-	 *        _______________________
-	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
-	 * WLO : | 4 | 5 | 6 | 6 | 8 | 8 |
-	 */
-	static const u8 frq_wlo_map[] = { 4, 5, 6, 6, 8, 8 };
-	return frq_wlo_map[get_FRQ(tCK) - 3];
-}
-
-static u8 get_CKE(u32 tCK)
-{
-	/* Get CKE based on MCU frequency using the following rule:
-	 *        _______________________
-	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
-	 * CKE : | 3 | 3 | 4 | 4 | 5 | 6 |
-	 */
-	static const u8 frq_cke_map[] = { 3, 3, 4, 4, 5, 6 };
-	return frq_cke_map[get_FRQ(tCK) - 3];
-}
-
-static u8 get_XPDLL(u32 tCK)
-{
-	/* Get XPDLL based on MCU frequency using the following rule:
-	 *          _____________________________
-	 * FRQ   : | 3  | 4  | 5  | 6  | 7  | 8  |
-	 * XPDLL : | 10 | 13 | 16 | 20 | 23 | 26 |
-	 */
-	static const u8 frq_xpdll_map[] = { 10, 13, 16, 20, 23, 26 };
-	return frq_xpdll_map[get_FRQ(tCK) - 3];
-}
-
-static u8 get_XP(u32 tCK)
-{
-	/* Get XP based on MCU frequency using the following rule:
-	 *        _______________________
-	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
-	 * XP  : | 3 | 4 | 4 | 5 | 6 | 7 |
-	 */
-	static const u8 frq_xp_map[] = { 3, 4, 4, 5, 6, 7 };
-	return frq_xp_map[get_FRQ(tCK) - 3];
-}
-
-static u8 get_AONPD(u32 tCK)
-{
-	/* Get AONPD based on MCU frequency using the following rule:
-	 *          ________________________
-	 * FRQ   : | 3 | 4 | 5 | 6 | 7 | 8  |
-	 * AONPD : | 4 | 5 | 6 | 8 | 8 | 10 |
-	 */
-	static const u8 frq_aonpd_map[] = { 4, 5, 6, 8, 8, 10 };
-	return frq_aonpd_map[get_FRQ(tCK) - 3];
-}
-
-static u32 get_COMP2(u32 tCK)
-{
-	/* Get COMP2 based on MCU frequency using the following rule:
-	 *         ___________________________________________________________
-	 * FRQ  : | 3       | 4       | 5       | 6       | 7       | 8       |
-	 * COMP : | D6BEDCC | CE7C34C | CA57A4C | C6369CC | C42514C | C21410C |
-	 */
-	static const u32 frq_comp2_map[] = { 0xD6BEDCC, 0xCE7C34C, 0xCA57A4C,
-		0xC6369CC, 0xC42514C, 0xC21410C
-	};
-	return frq_comp2_map[get_FRQ(tCK) - 3];
-}
-
-static void dram_timing(ramctr_timing * ctrl)
-{
-	u8 val;
-	u32 val32;
-
-	/* Maximum supported DDR3 frequency is 1066MHz (DDR3 2133) so make sure
-	 * we cap it if we have faster DIMMs.
-	 * Then, align it to the closest JEDEC standard frequency */
-	if (ctrl->tCK <= TCK_1066MHZ) {
-		ctrl->tCK = TCK_1066MHZ;
-		ctrl->edge_offset[0] = 16;
-		ctrl->edge_offset[1] = 7;
-		ctrl->edge_offset[2] = 7;
-		ctrl->timC_offset[0] = 18;
-		ctrl->timC_offset[1] = 7;
-		ctrl->timC_offset[2] = 7;
-		ctrl->reg_320c_range_threshold = 13;
-	} else if (ctrl->tCK <= TCK_933MHZ) {
-		ctrl->tCK = TCK_933MHZ;
-		ctrl->edge_offset[0] = 14;
-		ctrl->edge_offset[1] = 6;
-		ctrl->edge_offset[2] = 6;
-		ctrl->timC_offset[0] = 15;
-		ctrl->timC_offset[1] = 6;
-		ctrl->timC_offset[2] = 6;
-		ctrl->reg_320c_range_threshold = 15;
-	} else if (ctrl->tCK <= TCK_800MHZ) {
-		ctrl->tCK = TCK_800MHZ;
-		ctrl->edge_offset[0] = 13;
-		ctrl->edge_offset[1] = 5;
-		ctrl->edge_offset[2] = 5;
-		ctrl->timC_offset[0] = 14;
-		ctrl->timC_offset[1] = 5;
-		ctrl->timC_offset[2] = 5;
-		ctrl->reg_320c_range_threshold = 15;
-	} else if (ctrl->tCK <= TCK_666MHZ) {
-		ctrl->tCK = TCK_666MHZ;
-		ctrl->edge_offset[0] = 10;
-		ctrl->edge_offset[1] = 4;
-		ctrl->edge_offset[2] = 4;
-		ctrl->timC_offset[0] = 11;
-		ctrl->timC_offset[1] = 4;
-		ctrl->timC_offset[2] = 4;
-		ctrl->reg_320c_range_threshold = 16;
-	} else if (ctrl->tCK <= TCK_533MHZ) {
-		ctrl->tCK = TCK_533MHZ;
-		ctrl->edge_offset[0] = 8;
-		ctrl->edge_offset[1] = 3;
-		ctrl->edge_offset[2] = 3;
-		ctrl->timC_offset[0] = 9;
-		ctrl->timC_offset[1] = 3;
-		ctrl->timC_offset[2] = 3;
-		ctrl->reg_320c_range_threshold = 17;
-	} else  {
-		ctrl->tCK = TCK_400MHZ;
-		ctrl->edge_offset[0] = 6;
-		ctrl->edge_offset[1] = 2;
-		ctrl->edge_offset[2] = 2;
-		ctrl->timC_offset[0] = 6;
-		ctrl->timC_offset[1] = 2;
-		ctrl->timC_offset[2] = 2;
-		ctrl->reg_320c_range_threshold = 17;
-	}
-
-	/* Initial phase between CLK/CMD pins */
-	ctrl->reg_c14_offset = (256000 / ctrl->tCK) / 66;
-
-	/* DLL_CONFIG_MDLL_W_TIMER */
-	ctrl->reg_5064b0 = (128000 / ctrl->tCK) + 3;
-
-	val32 = (1000 << 8) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected DRAM frequency: %u MHz\n", val32);
-
-	/* Find CAS latency */
-	val = (ctrl->tAA + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Minimum  CAS latency   : %uT\n", val);
-	/* Find lowest supported CAS latency that satisfies the minimum value */
-	while (!((ctrl->cas_supported >> (val - MIN_CAS)) & 1)
-	       && (ctrl->cas_supported >> (val - MIN_CAS))) {
-		val++;
-	}
-	/* Is CAS supported */
-	if (!(ctrl->cas_supported & (1 << (val - MIN_CAS)))) {
-		printk(BIOS_ERR, "CAS %uT not supported. ", val);
-		val = MAX_CAS;
-		/* Find highest supported CAS latency */
-		while (!((ctrl->cas_supported >> (val - MIN_CAS)) & 1))
-			val--;
-
-		printk(BIOS_ERR, "Using CAS %uT instead.\n", val);
-	}
-
-	printk(BIOS_DEBUG, "Selected CAS latency   : %uT\n", val);
-	ctrl->CAS = val;
-	ctrl->CWL = get_CWL(ctrl->tCK);
-	printk(BIOS_DEBUG, "Selected CWL latency   : %uT\n", ctrl->CWL);
-
-	/* Find tRCD */
-	ctrl->tRCD = (ctrl->tRCD + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tRCD          : %uT\n", ctrl->tRCD);
-
-	ctrl->tRP = (ctrl->tRP + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tRP           : %uT\n", ctrl->tRP);
-
-	/* Find tRAS */
-	ctrl->tRAS = (ctrl->tRAS + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tRAS          : %uT\n", ctrl->tRAS);
-
-	/* Find tWR */
-	ctrl->tWR = (ctrl->tWR + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tWR           : %uT\n", ctrl->tWR);
-
-	/* Find tFAW */
-	ctrl->tFAW = (ctrl->tFAW + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tFAW          : %uT\n", ctrl->tFAW);
-
-	/* Find tRRD */
-	ctrl->tRRD = (ctrl->tRRD + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tRRD          : %uT\n", ctrl->tRRD);
-
-	/* Find tRTP */
-	ctrl->tRTP = (ctrl->tRTP + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tRTP          : %uT\n", ctrl->tRTP);
-
-	/* Find tWTR */
-	ctrl->tWTR = (ctrl->tWTR + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tWTR          : %uT\n", ctrl->tWTR);
-
-	/* Refresh-to-Active or Refresh-to-Refresh (tRFC) */
-	ctrl->tRFC = (ctrl->tRFC + ctrl->tCK - 1) / ctrl->tCK;
-	printk(BIOS_DEBUG, "Selected tRFC          : %uT\n", ctrl->tRFC);
-
-	ctrl->tREFI = get_REFI(ctrl->tCK);
-	ctrl->tMOD = get_MOD(ctrl->tCK);
-	ctrl->tXSOffset = get_XSOffset(ctrl->tCK);
-	ctrl->tWLO = get_WLO(ctrl->tCK);
-	ctrl->tCKE = get_CKE(ctrl->tCK);
-	ctrl->tXPDLL = get_XPDLL(ctrl->tCK);
-	ctrl->tXP = get_XP(ctrl->tCK);
-	ctrl->tAONPD = get_AONPD(ctrl->tCK);
-}
-
-static void dram_freq(ramctr_timing * ctrl)
-{
-	if (ctrl->tCK > TCK_400MHZ) {
-		printk (BIOS_ERR, "DRAM frequency is under lowest supported frequency (400 MHz). Increasing to 400 MHz as last resort");
-		ctrl->tCK = TCK_400MHZ;
-	}
-	while (1) {
-		u8 val2;
-		u32 reg1 = 0;
-
-		/* Step 1 - Set target PCU frequency */
-
-		if (ctrl->tCK <= TCK_1066MHZ) {
-			ctrl->tCK = TCK_1066MHZ;
-		} else if (ctrl->tCK <= TCK_933MHZ) {
-			ctrl->tCK = TCK_933MHZ;
-		} else if (ctrl->tCK <= TCK_800MHZ) {
-			ctrl->tCK = TCK_800MHZ;
-		} else if (ctrl->tCK <= TCK_666MHZ) {
-			ctrl->tCK = TCK_666MHZ;
-		} else if (ctrl->tCK <= TCK_533MHZ) {
-			ctrl->tCK = TCK_533MHZ;
-		} else if (ctrl->tCK <= TCK_400MHZ) {
-			ctrl->tCK = TCK_400MHZ;
-		} else {
-			die ("No lock frequency found");
-		}
-
-		/* Frequency multiplier.  */
-		u32 FRQ = get_FRQ(ctrl->tCK);
-
-		/* The PLL will never lock if the required frequency is
-		 * already set. Exit early to prevent a system hang.
-		 */
-		reg1 = MCHBAR32(MC_BIOS_DATA);
-		val2 = (u8) reg1;
-		if (val2)
-			return;
-
-		/* Step 2 - Select frequency in the MCU */
-		reg1 = FRQ;
-		reg1 |= 0x80000000;	// set running bit
-		MCHBAR32(MC_BIOS_REQ) = reg1;
-		int i=0;
-		printk(BIOS_DEBUG, "PLL busy... ");
-		while (reg1 & 0x80000000) {
-			udelay(10);
-			i++;
-			reg1 = MCHBAR32(MC_BIOS_REQ);
-		}
-		printk(BIOS_DEBUG, "done in %d us\n", i * 10);
-
-		/* Step 3 - Verify lock frequency */
-		reg1 = MCHBAR32(MC_BIOS_DATA);
-		val2 = (u8) reg1;
-		if (val2 >= FRQ) {
-			printk(BIOS_DEBUG, "MCU frequency is set at : %d MHz\n",
-			       (1000 << 8) / ctrl->tCK);
-			return;
-		}
-		printk(BIOS_DEBUG, "PLL didn't lock. Retrying at lower frequency\n");
-		ctrl->tCK++;
-	}
-}
-
-static void dram_ioregs(ramctr_timing * ctrl)
-{
-	u32 reg, comp2;
-
-	int channel;
-
-	// IO clock
-	FOR_ALL_CHANNELS {
-		MCHBAR32(0xc00 + 0x100 * channel) = ctrl->rankmap[channel];
-	}
-
-	// IO command
-	FOR_ALL_CHANNELS {
-		MCHBAR32(0x3200 + 0x100 * channel) = ctrl->rankmap[channel];
-	}
-
-	// IO control
-	FOR_ALL_POPULATED_CHANNELS {
-		program_timings(ctrl, channel);
-	}
-
-	// Rcomp
-	printram("RCOMP...");
-	reg = 0;
-	while (reg == 0) {
-		reg = MCHBAR32(0x5084) & 0x10000;
-	}
-	printram("done\n");
-
-	// Set comp2
-	comp2 = get_COMP2(ctrl->tCK);
-	MCHBAR32(0x3714) = comp2;
-	printram("COMP2 done\n");
-
-	// Set comp1
-	FOR_ALL_POPULATED_CHANNELS {
-		reg = MCHBAR32(0x1810 + channel * 0x100);	//ch0
-		reg = (reg & ~0xe00) | (1 << 9);	//odt
-		reg = (reg & ~0xe00000) | (1 << 21);	//clk drive up
-		reg = (reg & ~0x38000000) | (1 << 27);	//ctl drive up
-		MCHBAR32(0x1810 + channel * 0x100) = reg;
-	}
-	printram("COMP1 done\n");
-
-	printram("FORCE RCOMP and wait 20us...");
-	MCHBAR32(0x5f08) |= 0x100;
-	udelay(20);
-	printram("done\n");
-}
-
 static void save_timings(ramctr_timing *ctrl)
 {
 	/* Save the MRC S3 restore data to cbmem */
@@ -657,121 +286,10 @@ static void save_timings(ramctr_timing *ctrl)
 static int try_init_dram_ddr3(ramctr_timing *ctrl, int fast_boot,
 		int s3_resume, int me_uma_size)
 {
-	int err;
-
-	printk(BIOS_DEBUG, "Starting RAM training (%d).\n", fast_boot);
-
-	if (!fast_boot) {
-		/* Find fastest common supported parameters */
-		dram_find_common_params(ctrl);
-
-		dram_dimm_mapping(ctrl);
-	}
-
-	/* Set MCU frequency */
-	dram_freq(ctrl);
-
-	if (!fast_boot) {
-		/* Calculate timings */
-		dram_timing(ctrl);
-	}
-
-	/* Set version register */
-	MCHBAR32(0x5034) = 0xC04EB002;
-
-	/* Enable crossover */
-	dram_xover(ctrl);
-
-	/* Set timing and refresh registers */
-	dram_timing_regs(ctrl);
-
-	/* Power mode preset */
-	MCHBAR32(0x4e80) = 0x5500;
-
-	/* Set scheduler parameters */
-	MCHBAR32(0x4c20) = 0x10100005;
-
-	/* Set CPU specific register */
-	set_4f8c();
-
-	/* Clear IO reset bit */
-	MCHBAR32(0x5030) &= ~0x20;
-
-	/* Set MAD-DIMM registers */
-	dram_dimm_set_mapping(ctrl);
-	printk(BIOS_DEBUG, "Done dimm mapping\n");
-
-	/* Zone config */
-	dram_zones(ctrl, 1);
-
-	/* Set memory map */
-	dram_memorymap(ctrl, me_uma_size);
-	printk(BIOS_DEBUG, "Done memory map\n");
-
-	/* Set IO registers */
-	dram_ioregs(ctrl);
-	printk(BIOS_DEBUG, "Done io registers\n");
-
-	udelay(1);
-
-	if (fast_boot) {
-		restore_timings(ctrl);
-	} else {
-		/* Do jedec ddr3 reset sequence */
-		dram_jedecreset(ctrl);
-		printk(BIOS_DEBUG, "Done jedec reset\n");
-
-		/* MRS commands */
-		dram_mrscommands(ctrl);
-		printk(BIOS_DEBUG, "Done MRS commands\n");
-
-		/* Prepare for memory training */
-		prepare_training(ctrl);
-
-		err = read_training(ctrl);
-		if (err)
-			return err;
-
-		err = write_training(ctrl);
-		if (err)
-			return err;
-
-		printram("CP5a\n");
-
-		err = discover_edges(ctrl);
-		if (err)
-			return err;
-
-		printram("CP5b\n");
-
-		err = command_training(ctrl);
-		if (err)
-			return err;
-
-		printram("CP5c\n");
-
-		err = discover_edges_write(ctrl);
-		if (err)
-			return err;
-
-		err = discover_timC_write(ctrl);
-		if (err)
-			return err;
-
-		normalize_training(ctrl);
-	}
-
-	set_4008c(ctrl);
-
-	write_controller_mr(ctrl);
-
-	if (!s3_resume) {
-		err = channel_test(ctrl);
-		if (err)
-			return err;
-	}
-
-	return 0;
+	if (ctrl->sandybridge)
+		return try_init_dram_ddr3_sandy(ctrl, fast_boot, s3_resume, me_uma_size);
+	else
+		return try_init_dram_ddr3_ivy(ctrl, fast_boot, s3_resume, me_uma_size);
 }
 
 static void init_dram_ddr3(int mobile, int min_tck, int s3resume)
@@ -783,7 +301,9 @@ static void init_dram_ddr3(int mobile, int min_tck, int s3resume)
 	spd_raw_data spds[4];
 	struct mrc_data_container *mrc_cache;
 	ramctr_timing *ctrl_cached;
+	struct cpuid_result cpures;
 	int err;
+	u32 cpu;
 
 	MCHBAR32(0x5f00) |= 1;
 
@@ -864,6 +384,11 @@ static void init_dram_ddr3(int mobile, int min_tck, int s3resume)
 		ctrl.mobile = mobile;
 		ctrl.tCK = min_tck;
 
+		/* Get architecture */
+		cpures = cpuid(1);
+		cpu = cpures.eax;
+		ctrl.sandybridge = IS_SANDY_CPU(cpu);
+
 		/* Get DDR3 SPD data */
 		memset(spds, 0, sizeof(spds));
 		mainboard_get_spd(spds, 0);
@@ -882,6 +407,11 @@ static void init_dram_ddr3(int mobile, int min_tck, int s3resume)
 		ctrl.mobile = mobile;
 		ctrl.tCK = min_tck;
 
+		/* Get architecture */
+		cpures = cpuid(1);
+		cpu = cpures.eax;
+		ctrl.sandybridge = IS_SANDY_CPU(cpu);
+
 		/* Reset DDR3 frequency */
 		dram_find_spds_ddr3(spds, &ctrl);
 
diff --git a/src/northbridge/intel/sandybridge/raminit_common.h b/src/northbridge/intel/sandybridge/raminit_common.h
index 4655ed5f80..7aec7354b1 100644
--- a/src/northbridge/intel/sandybridge/raminit_common.h
+++ b/src/northbridge/intel/sandybridge/raminit_common.h
@@ -76,6 +76,7 @@ struct ramctr_timing_st;
 typedef struct ramctr_timing_st {
 	u16 spd_crc[NUM_CHANNELS][NUM_SLOTS];
 	int mobile;
+	int sandybridge;
 
 	u16 cas_supported;
 	/* tLatencies are in units of ns, scaled by x256 */
@@ -176,5 +177,10 @@ void set_42a0(ramctr_timing * ctrl);
 void final_registers(ramctr_timing * ctrl);
 void restore_timings(ramctr_timing * ctrl);
 
-#endif
+int try_init_dram_ddr3_sandy(ramctr_timing *ctrl, int fast_boot,
+		int s3_resume, int me_uma_size);
+
+int try_init_dram_ddr3_ivy(ramctr_timing *ctrl, int fast_boot,
+		int s3_resume, int me_uma_size);
 
+#endif
diff --git a/src/northbridge/intel/sandybridge/raminit_ivy.c b/src/northbridge/intel/sandybridge/raminit_ivy.c
new file mode 100644
index 0000000000..9349cf772f
--- /dev/null
+++ b/src/northbridge/intel/sandybridge/raminit_ivy.c
@@ -0,0 +1,514 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Damien Zammit <damien@zamaudio.com>
+ * Copyright (C) 2014 Vladimir Serbinenko <phcoder@gmail.com>
+ * Copyright (C) 2016 Patrick Rudolph <siro@das-labor.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <console/console.h>
+#include <console/usb.h>
+#include <cpu/x86/msr.h>
+#include <delay.h>
+#include "raminit_native.h"
+#include "raminit_common.h"
+
+/* Frequency multiplier.  */
+static u32 get_FRQ(u32 tCK)
+{
+	u32 FRQ;
+	FRQ = 256000 / (tCK * BASEFREQ);
+	if (FRQ > 8)
+		return 8;
+	if (FRQ < 3)
+		return 3;
+	return FRQ;
+}
+
+static u32 get_REFI(u32 tCK)
+{
+	/* Get REFI based on MCU frequency using the following rule:
+	 *        _________________________________________
+	 * FRQ : | 3    | 4    | 5    | 6    | 7    | 8    |
+	 * REFI: | 3120 | 4160 | 5200 | 6240 | 7280 | 8320 |
+	 */
+	static const u32 frq_refi_map[] =
+	    { 3120, 4160, 5200, 6240, 7280, 8320 };
+	return frq_refi_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_XSOffset(u32 tCK)
+{
+	/* Get XSOffset based on MCU frequency using the following rule:
+	 *             _________________________
+	 * FRQ      : | 3 | 4 | 5 | 6 | 7  | 8  |
+	 * XSOffset : | 4 | 6 | 7 | 8 | 10 | 11 |
+	 */
+	static const u8 frq_xs_map[] = { 4, 6, 7, 8, 10, 11 };
+	return frq_xs_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_MOD(u32 tCK)
+{
+	/* Get MOD based on MCU frequency using the following rule:
+	 *        _____________________________
+	 * FRQ : | 3  | 4  | 5  | 6  | 7  | 8  |
+	 * MOD : | 12 | 12 | 12 | 12 | 15 | 16 |
+	 */
+	static const u8 frq_mod_map[] = { 12, 12, 12, 12, 15, 16 };
+	return frq_mod_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_WLO(u32 tCK)
+{
+	/* Get WLO based on MCU frequency using the following rule:
+	 *        _______________________
+	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
+	 * WLO : | 4 | 5 | 6 | 6 | 8 | 8 |
+	 */
+	static const u8 frq_wlo_map[] = { 4, 5, 6, 6, 8, 8 };
+	return frq_wlo_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_CKE(u32 tCK)
+{
+	/* Get CKE based on MCU frequency using the following rule:
+	 *        _______________________
+	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
+	 * CKE : | 3 | 3 | 4 | 4 | 5 | 6 |
+	 */
+	static const u8 frq_cke_map[] = { 3, 3, 4, 4, 5, 6 };
+	return frq_cke_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_XPDLL(u32 tCK)
+{
+	/* Get XPDLL based on MCU frequency using the following rule:
+	 *          _____________________________
+	 * FRQ   : | 3  | 4  | 5  | 6  | 7  | 8  |
+	 * XPDLL : | 10 | 13 | 16 | 20 | 23 | 26 |
+	 */
+	static const u8 frq_xpdll_map[] = { 10, 13, 16, 20, 23, 26 };
+	return frq_xpdll_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_XP(u32 tCK)
+{
+	/* Get XP based on MCU frequency using the following rule:
+	 *        _______________________
+	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
+	 * XP  : | 3 | 4 | 4 | 5 | 6 | 7 |
+	 */
+	static const u8 frq_xp_map[] = { 3, 4, 4, 5, 6, 7 };
+	return frq_xp_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_AONPD(u32 tCK)
+{
+	/* Get AONPD based on MCU frequency using the following rule:
+	 *          ________________________
+	 * FRQ   : | 3 | 4 | 5 | 6 | 7 | 8  |
+	 * AONPD : | 4 | 5 | 6 | 8 | 8 | 10 |
+	 */
+	static const u8 frq_aonpd_map[] = { 4, 5, 6, 8, 8, 10 };
+	return frq_aonpd_map[get_FRQ(tCK) - 3];
+}
+
+static u32 get_COMP2(u32 tCK)
+{
+	/* Get COMP2 based on MCU frequency using the following rule:
+	 *         ___________________________________________________________
+	 * FRQ  : | 3       | 4       | 5       | 6       | 7       | 8       |
+	 * COMP : | D6BEDCC | CE7C34C | CA57A4C | C6369CC | C42514C | C21410C |
+	 */
+	static const u32 frq_comp2_map[] = { 0xD6BEDCC, 0xCE7C34C, 0xCA57A4C,
+		0xC6369CC, 0xC42514C, 0xC21410C
+	};
+	return frq_comp2_map[get_FRQ(tCK) - 3];
+}
+
+static void dram_timing(ramctr_timing * ctrl)
+{
+	u8 val;
+	u32 val32;
+
+	/* Maximum supported DDR3 frequency is 1066MHz (DDR3 2133) so make sure
+	 * we cap it if we have faster DIMMs.
+	 * Then, align it to the closest JEDEC standard frequency */
+	if (ctrl->tCK <= TCK_1066MHZ) {
+		ctrl->tCK = TCK_1066MHZ;
+		ctrl->edge_offset[0] = 16;
+		ctrl->edge_offset[1] = 7;
+		ctrl->edge_offset[2] = 7;
+		ctrl->timC_offset[0] = 18;
+		ctrl->timC_offset[1] = 7;
+		ctrl->timC_offset[2] = 7;
+		ctrl->reg_320c_range_threshold = 13;
+	} else if (ctrl->tCK <= TCK_933MHZ) {
+		ctrl->tCK = TCK_933MHZ;
+		ctrl->edge_offset[0] = 14;
+		ctrl->edge_offset[1] = 6;
+		ctrl->edge_offset[2] = 6;
+		ctrl->timC_offset[0] = 15;
+		ctrl->timC_offset[1] = 6;
+		ctrl->timC_offset[2] = 6;
+		ctrl->reg_320c_range_threshold = 15;
+	} else if (ctrl->tCK <= TCK_800MHZ) {
+		ctrl->tCK = TCK_800MHZ;
+		ctrl->edge_offset[0] = 13;
+		ctrl->edge_offset[1] = 5;
+		ctrl->edge_offset[2] = 5;
+		ctrl->timC_offset[0] = 14;
+		ctrl->timC_offset[1] = 5;
+		ctrl->timC_offset[2] = 5;
+		ctrl->reg_320c_range_threshold = 15;
+	} else if (ctrl->tCK <= TCK_666MHZ) {
+		ctrl->tCK = TCK_666MHZ;
+		ctrl->edge_offset[0] = 10;
+		ctrl->edge_offset[1] = 4;
+		ctrl->edge_offset[2] = 4;
+		ctrl->timC_offset[0] = 11;
+		ctrl->timC_offset[1] = 4;
+		ctrl->timC_offset[2] = 4;
+		ctrl->reg_320c_range_threshold = 16;
+	} else if (ctrl->tCK <= TCK_533MHZ) {
+		ctrl->tCK = TCK_533MHZ;
+		ctrl->edge_offset[0] = 8;
+		ctrl->edge_offset[1] = 3;
+		ctrl->edge_offset[2] = 3;
+		ctrl->timC_offset[0] = 9;
+		ctrl->timC_offset[1] = 3;
+		ctrl->timC_offset[2] = 3;
+		ctrl->reg_320c_range_threshold = 17;
+	} else  {
+		ctrl->tCK = TCK_400MHZ;
+		ctrl->edge_offset[0] = 6;
+		ctrl->edge_offset[1] = 2;
+		ctrl->edge_offset[2] = 2;
+		ctrl->timC_offset[0] = 6;
+		ctrl->timC_offset[1] = 2;
+		ctrl->timC_offset[2] = 2;
+		ctrl->reg_320c_range_threshold = 17;
+	}
+
+	/* Initial phase between CLK/CMD pins */
+	ctrl->reg_c14_offset = (256000 / ctrl->tCK) / 66;
+
+	/* DLL_CONFIG_MDLL_W_TIMER */
+	ctrl->reg_5064b0 = (128000 / ctrl->tCK) + 3;
+
+	val32 = (1000 << 8) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected DRAM frequency: %u MHz\n", val32);
+
+	/* Find CAS latency */
+	val = (ctrl->tAA + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Minimum  CAS latency   : %uT\n", val);
+	/* Find lowest supported CAS latency that satisfies the minimum value */
+	while (!((ctrl->cas_supported >> (val - MIN_CAS)) & 1)
+		   && (ctrl->cas_supported >> (val - MIN_CAS))) {
+		val++;
+	}
+	/* Is CAS supported */
+	if (!(ctrl->cas_supported & (1 << (val - MIN_CAS)))) {
+		printk(BIOS_ERR, "CAS %uT not supported. ", val);
+		val = MAX_CAS;
+		/* Find highest supported CAS latency */
+		while (!((ctrl->cas_supported >> (val - MIN_CAS)) & 1))
+			val--;
+
+		printk(BIOS_ERR, "Using CAS %uT instead.\n", val);
+	}
+
+	printk(BIOS_DEBUG, "Selected CAS latency   : %uT\n", val);
+	ctrl->CAS = val;
+	ctrl->CWL = get_CWL(ctrl->tCK);
+	printk(BIOS_DEBUG, "Selected CWL latency   : %uT\n", ctrl->CWL);
+
+	/* Find tRCD */
+	ctrl->tRCD = (ctrl->tRCD + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRCD          : %uT\n", ctrl->tRCD);
+
+	ctrl->tRP = (ctrl->tRP + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRP           : %uT\n", ctrl->tRP);
+
+	/* Find tRAS */
+	ctrl->tRAS = (ctrl->tRAS + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRAS          : %uT\n", ctrl->tRAS);
+
+	/* Find tWR */
+	ctrl->tWR = (ctrl->tWR + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tWR           : %uT\n", ctrl->tWR);
+
+	/* Find tFAW */
+	ctrl->tFAW = (ctrl->tFAW + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tFAW          : %uT\n", ctrl->tFAW);
+
+	/* Find tRRD */
+	ctrl->tRRD = (ctrl->tRRD + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRRD          : %uT\n", ctrl->tRRD);
+
+	/* Find tRTP */
+	ctrl->tRTP = (ctrl->tRTP + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRTP          : %uT\n", ctrl->tRTP);
+
+	/* Find tWTR */
+	ctrl->tWTR = (ctrl->tWTR + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tWTR          : %uT\n", ctrl->tWTR);
+
+	/* Refresh-to-Active or Refresh-to-Refresh (tRFC) */
+	ctrl->tRFC = (ctrl->tRFC + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRFC          : %uT\n", ctrl->tRFC);
+
+	ctrl->tREFI = get_REFI(ctrl->tCK);
+	ctrl->tMOD = get_MOD(ctrl->tCK);
+	ctrl->tXSOffset = get_XSOffset(ctrl->tCK);
+	ctrl->tWLO = get_WLO(ctrl->tCK);
+	ctrl->tCKE = get_CKE(ctrl->tCK);
+	ctrl->tXPDLL = get_XPDLL(ctrl->tCK);
+	ctrl->tXP = get_XP(ctrl->tCK);
+	ctrl->tAONPD = get_AONPD(ctrl->tCK);
+}
+
+static void dram_freq(ramctr_timing * ctrl)
+{
+	if (ctrl->tCK > TCK_400MHZ) {
+		printk (BIOS_ERR, "DRAM frequency is under lowest supported frequency (400 MHz). Increasing to 400 MHz as last resort");
+		ctrl->tCK = TCK_400MHZ;
+	}
+	while (1) {
+		u8 val2;
+		u32 reg1 = 0;
+
+		/* Step 1 - Set target PCU frequency */
+
+		if (ctrl->tCK <= TCK_1066MHZ) {
+			ctrl->tCK = TCK_1066MHZ;
+		} else if (ctrl->tCK <= TCK_933MHZ) {
+			ctrl->tCK = TCK_933MHZ;
+		} else if (ctrl->tCK <= TCK_800MHZ) {
+			ctrl->tCK = TCK_800MHZ;
+		} else if (ctrl->tCK <= TCK_666MHZ) {
+			ctrl->tCK = TCK_666MHZ;
+		} else if (ctrl->tCK <= TCK_533MHZ) {
+			ctrl->tCK = TCK_533MHZ;
+		} else if (ctrl->tCK <= TCK_400MHZ) {
+			ctrl->tCK = TCK_400MHZ;
+		} else {
+			die ("No lock frequency found");
+		}
+
+		/* Frequency multiplier.  */
+		u32 FRQ = get_FRQ(ctrl->tCK);
+
+		/* The PLL will never lock if the required frequency is
+		 * already set. Exit early to prevent a system hang.
+		 */
+		reg1 = MCHBAR32(MC_BIOS_DATA);
+		val2 = (u8) reg1;
+		if (val2)
+			return;
+
+		/* Step 2 - Select frequency in the MCU */
+		reg1 = FRQ;
+		reg1 |= 0x80000000;	// set running bit
+		MCHBAR32(MC_BIOS_REQ) = reg1;
+		int i=0;
+		printk(BIOS_DEBUG, "PLL busy... ");
+		while (reg1 & 0x80000000) {
+			udelay(10);
+			i++;
+			reg1 = MCHBAR32(MC_BIOS_REQ);
+		}
+		printk(BIOS_DEBUG, "done in %d us\n", i * 10);
+
+		/* Step 3 - Verify lock frequency */
+		reg1 = MCHBAR32(MC_BIOS_DATA);
+		val2 = (u8) reg1;
+		if (val2 >= FRQ) {
+			printk(BIOS_DEBUG, "MCU frequency is set at : %d MHz\n",
+			       (1000 << 8) / ctrl->tCK);
+			return;
+		}
+		printk(BIOS_DEBUG, "PLL didn't lock. Retrying at lower frequency\n");
+		ctrl->tCK++;
+	}
+}
+
+static void dram_ioregs(ramctr_timing * ctrl)
+{
+	u32 reg, comp2;
+
+	int channel;
+
+	// IO clock
+	FOR_ALL_CHANNELS {
+		MCHBAR32(0xc00 + 0x100 * channel) = ctrl->rankmap[channel];
+	}
+
+	// IO command
+	FOR_ALL_CHANNELS {
+		MCHBAR32(0x3200 + 0x100 * channel) = ctrl->rankmap[channel];
+	}
+
+	// IO control
+	FOR_ALL_POPULATED_CHANNELS {
+		program_timings(ctrl, channel);
+	}
+
+	// Rcomp
+	printram("RCOMP...");
+	reg = 0;
+	while (reg == 0) {
+		reg = MCHBAR32(0x5084) & 0x10000;
+	}
+	printram("done\n");
+
+	// Set comp2
+	comp2 = get_COMP2(ctrl->tCK);
+	MCHBAR32(0x3714) = comp2;
+	printram("COMP2 done\n");
+
+	// Set comp1
+	FOR_ALL_POPULATED_CHANNELS {
+		reg = MCHBAR32(0x1810 + channel * 0x100);	//ch0
+		reg = (reg & ~0xe00) | (1 << 9);	//odt
+		reg = (reg & ~0xe00000) | (1 << 21);	//clk drive up
+		reg = (reg & ~0x38000000) | (1 << 27);	//ctl drive up
+		MCHBAR32(0x1810 + channel * 0x100) = reg;
+	}
+	printram("COMP1 done\n");
+
+	printram("FORCE RCOMP and wait 20us...");
+	MCHBAR32(0x5f08) |= 0x100;
+	udelay(20);
+	printram("done\n");
+}
+
+int try_init_dram_ddr3_ivy(ramctr_timing *ctrl, int fast_boot,
+		int s3_resume, int me_uma_size)
+{
+	int err;
+
+	printk(BIOS_DEBUG, "Starting RAM training (%d).\n", fast_boot);
+
+	if (!fast_boot) {
+		/* Find fastest common supported parameters */
+		dram_find_common_params(ctrl);
+
+		dram_dimm_mapping(ctrl);
+	}
+
+	/* Set MCU frequency */
+	dram_freq(ctrl);
+
+	if (!fast_boot) {
+		/* Calculate timings */
+		dram_timing(ctrl);
+	}
+
+	/* Set version register */
+	MCHBAR32(0x5034) = 0xC04EB002;
+
+	/* Enable crossover */
+	dram_xover(ctrl);
+
+	/* Set timing and refresh registers */
+	dram_timing_regs(ctrl);
+
+	/* Power mode preset */
+	MCHBAR32(0x4e80) = 0x5500;
+
+	/* Set scheduler parameters */
+	MCHBAR32(0x4c20) = 0x10100005;
+
+	/* Set CPU specific register */
+	set_4f8c();
+
+	/* Clear IO reset bit */
+	MCHBAR32(0x5030) &= ~0x20;
+
+	/* Set MAD-DIMM registers */
+	dram_dimm_set_mapping(ctrl);
+	printk(BIOS_DEBUG, "Done dimm mapping\n");
+
+	/* Zone config */
+	dram_zones(ctrl, 1);
+
+	/* Set memory map */
+	dram_memorymap(ctrl, me_uma_size);
+	printk(BIOS_DEBUG, "Done memory map\n");
+
+	/* Set IO registers */
+	dram_ioregs(ctrl);
+	printk(BIOS_DEBUG, "Done io registers\n");
+
+	udelay(1);
+
+	if (fast_boot) {
+		restore_timings(ctrl);
+	} else {
+		/* Do jedec ddr3 reset sequence */
+		dram_jedecreset(ctrl);
+		printk(BIOS_DEBUG, "Done jedec reset\n");
+
+		/* MRS commands */
+		dram_mrscommands(ctrl);
+		printk(BIOS_DEBUG, "Done MRS commands\n");
+
+		/* Prepare for memory training */
+		prepare_training(ctrl);
+
+		err = read_training(ctrl);
+		if (err)
+			return err;
+
+		err = write_training(ctrl);
+		if (err)
+			return err;
+
+		printram("CP5a\n");
+
+		err = discover_edges(ctrl);
+		if (err)
+			return err;
+
+		printram("CP5b\n");
+
+		err = command_training(ctrl);
+		if (err)
+			return err;
+
+		printram("CP5c\n");
+
+		err = discover_edges_write(ctrl);
+		if (err)
+			return err;
+
+		err = discover_timC_write(ctrl);
+		if (err)
+			return err;
+
+		normalize_training(ctrl);
+	}
+
+	set_4008c(ctrl);
+
+	write_controller_mr(ctrl);
+
+	if (!s3_resume) {
+		err = channel_test(ctrl);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
diff --git a/src/northbridge/intel/sandybridge/raminit_sandy.c b/src/northbridge/intel/sandybridge/raminit_sandy.c
new file mode 100644
index 0000000000..a83cb359fb
--- /dev/null
+++ b/src/northbridge/intel/sandybridge/raminit_sandy.c
@@ -0,0 +1,514 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Damien Zammit <damien@zamaudio.com>
+ * Copyright (C) 2014 Vladimir Serbinenko <phcoder@gmail.com>
+ * Copyright (C) 2016 Patrick Rudolph <siro@das-labor.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <console/console.h>
+#include <console/usb.h>
+#include <cpu/x86/msr.h>
+#include <delay.h>
+#include "raminit_native.h"
+#include "raminit_common.h"
+
+/* Frequency multiplier.  */
+static u32 get_FRQ(u32 tCK)
+{
+	u32 FRQ;
+	FRQ = 256000 / (tCK * BASEFREQ);
+	if (FRQ > 8)
+		return 8;
+	if (FRQ < 3)
+		return 3;
+	return FRQ;
+}
+
+static u32 get_REFI(u32 tCK)
+{
+	/* Get REFI based on MCU frequency using the following rule:
+	 *        _________________________________________
+	 * FRQ : | 3    | 4    | 5    | 6    | 7    | 8    |
+	 * REFI: | 3120 | 4160 | 5200 | 6240 | 7280 | 8320 |
+	 */
+	static const u32 frq_refi_map[] =
+	    { 3120, 4160, 5200, 6240, 7280, 8320 };
+	return frq_refi_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_XSOffset(u32 tCK)
+{
+	/* Get XSOffset based on MCU frequency using the following rule:
+	 *             _________________________
+	 * FRQ      : | 3 | 4 | 5 | 6 | 7  | 8  |
+	 * XSOffset : | 4 | 6 | 7 | 8 | 10 | 11 |
+	 */
+	static const u8 frq_xs_map[] = { 4, 6, 7, 8, 10, 11 };
+	return frq_xs_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_MOD(u32 tCK)
+{
+	/* Get MOD based on MCU frequency using the following rule:
+	 *        _____________________________
+	 * FRQ : | 3  | 4  | 5  | 6  | 7  | 8  |
+	 * MOD : | 12 | 12 | 12 | 12 | 15 | 16 |
+	 */
+	static const u8 frq_mod_map[] = { 12, 12, 12, 12, 15, 16 };
+	return frq_mod_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_WLO(u32 tCK)
+{
+	/* Get WLO based on MCU frequency using the following rule:
+	 *        _______________________
+	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
+	 * WLO : | 4 | 5 | 6 | 6 | 8 | 8 |
+	 */
+	static const u8 frq_wlo_map[] = { 4, 5, 6, 6, 8, 8 };
+	return frq_wlo_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_CKE(u32 tCK)
+{
+	/* Get CKE based on MCU frequency using the following rule:
+	 *        _______________________
+	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
+	 * CKE : | 3 | 3 | 4 | 4 | 5 | 6 |
+	 */
+	static const u8 frq_cke_map[] = { 3, 3, 4, 4, 5, 6 };
+	return frq_cke_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_XPDLL(u32 tCK)
+{
+	/* Get XPDLL based on MCU frequency using the following rule:
+	 *          _____________________________
+	 * FRQ   : | 3  | 4  | 5  | 6  | 7  | 8  |
+	 * XPDLL : | 10 | 13 | 16 | 20 | 23 | 26 |
+	 */
+	static const u8 frq_xpdll_map[] = { 10, 13, 16, 20, 23, 26 };
+	return frq_xpdll_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_XP(u32 tCK)
+{
+	/* Get XP based on MCU frequency using the following rule:
+	 *        _______________________
+	 * FRQ : | 3 | 4 | 5 | 6 | 7 | 8 |
+	 * XP  : | 3 | 4 | 4 | 5 | 6 | 7 |
+	 */
+	static const u8 frq_xp_map[] = { 3, 4, 4, 5, 6, 7 };
+	return frq_xp_map[get_FRQ(tCK) - 3];
+}
+
+static u8 get_AONPD(u32 tCK)
+{
+	/* Get AONPD based on MCU frequency using the following rule:
+	 *          ________________________
+	 * FRQ   : | 3 | 4 | 5 | 6 | 7 | 8  |
+	 * AONPD : | 4 | 5 | 6 | 8 | 8 | 10 |
+	 */
+	static const u8 frq_aonpd_map[] = { 4, 5, 6, 8, 8, 10 };
+	return frq_aonpd_map[get_FRQ(tCK) - 3];
+}
+
+static u32 get_COMP2(u32 tCK)
+{
+	/* Get COMP2 based on MCU frequency using the following rule:
+	 *         ___________________________________________________________
+	 * FRQ  : | 3       | 4       | 5       | 6       | 7       | 8       |
+	 * COMP : | D6BEDCC | CE7C34C | CA57A4C | C6369CC | C42514C | C21410C |
+	 */
+	static const u32 frq_comp2_map[] = { 0xD6BEDCC, 0xCE7C34C, 0xCA57A4C,
+		0xC6369CC, 0xC42514C, 0xC21410C
+	};
+	return frq_comp2_map[get_FRQ(tCK) - 3];
+}
+
+static void dram_timing(ramctr_timing * ctrl)
+{
+	u8 val;
+	u32 val32;
+
+	/* Maximum supported DDR3 frequency is 1066MHz (DDR3 2133) so make sure
+	 * we cap it if we have faster DIMMs.
+	 * Then, align it to the closest JEDEC standard frequency */
+	if (ctrl->tCK <= TCK_1066MHZ) {
+		ctrl->tCK = TCK_1066MHZ;
+		ctrl->edge_offset[0] = 16;
+		ctrl->edge_offset[1] = 7;
+		ctrl->edge_offset[2] = 7;
+		ctrl->timC_offset[0] = 18;
+		ctrl->timC_offset[1] = 7;
+		ctrl->timC_offset[2] = 7;
+		ctrl->reg_320c_range_threshold = 13;
+	} else if (ctrl->tCK <= TCK_933MHZ) {
+		ctrl->tCK = TCK_933MHZ;
+		ctrl->edge_offset[0] = 14;
+		ctrl->edge_offset[1] = 6;
+		ctrl->edge_offset[2] = 6;
+		ctrl->timC_offset[0] = 15;
+		ctrl->timC_offset[1] = 6;
+		ctrl->timC_offset[2] = 6;
+		ctrl->reg_320c_range_threshold = 15;
+	} else if (ctrl->tCK <= TCK_800MHZ) {
+		ctrl->tCK = TCK_800MHZ;
+		ctrl->edge_offset[0] = 13;
+		ctrl->edge_offset[1] = 5;
+		ctrl->edge_offset[2] = 5;
+		ctrl->timC_offset[0] = 14;
+		ctrl->timC_offset[1] = 5;
+		ctrl->timC_offset[2] = 5;
+		ctrl->reg_320c_range_threshold = 15;
+	} else if (ctrl->tCK <= TCK_666MHZ) {
+		ctrl->tCK = TCK_666MHZ;
+		ctrl->edge_offset[0] = 10;
+		ctrl->edge_offset[1] = 4;
+		ctrl->edge_offset[2] = 4;
+		ctrl->timC_offset[0] = 11;
+		ctrl->timC_offset[1] = 4;
+		ctrl->timC_offset[2] = 4;
+		ctrl->reg_320c_range_threshold = 16;
+	} else if (ctrl->tCK <= TCK_533MHZ) {
+		ctrl->tCK = TCK_533MHZ;
+		ctrl->edge_offset[0] = 8;
+		ctrl->edge_offset[1] = 3;
+		ctrl->edge_offset[2] = 3;
+		ctrl->timC_offset[0] = 9;
+		ctrl->timC_offset[1] = 3;
+		ctrl->timC_offset[2] = 3;
+		ctrl->reg_320c_range_threshold = 17;
+	} else  {
+		ctrl->tCK = TCK_400MHZ;
+		ctrl->edge_offset[0] = 6;
+		ctrl->edge_offset[1] = 2;
+		ctrl->edge_offset[2] = 2;
+		ctrl->timC_offset[0] = 6;
+		ctrl->timC_offset[1] = 2;
+		ctrl->timC_offset[2] = 2;
+		ctrl->reg_320c_range_threshold = 17;
+	}
+
+	/* Initial phase between CLK/CMD pins */
+	ctrl->reg_c14_offset = (256000 / ctrl->tCK) / 66;
+
+	/* DLL_CONFIG_MDLL_W_TIMER */
+	ctrl->reg_5064b0 = (128000 / ctrl->tCK) + 3;
+
+	val32 = (1000 << 8) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected DRAM frequency: %u MHz\n", val32);
+
+	/* Find CAS latency */
+	val = (ctrl->tAA + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Minimum  CAS latency   : %uT\n", val);
+	/* Find lowest supported CAS latency that satisfies the minimum value */
+	while (!((ctrl->cas_supported >> (val - MIN_CAS)) & 1)
+		   && (ctrl->cas_supported >> (val - MIN_CAS))) {
+		val++;
+	}
+	/* Is CAS supported */
+	if (!(ctrl->cas_supported & (1 << (val - MIN_CAS)))) {
+		printk(BIOS_ERR, "CAS %uT not supported. ", val);
+		val = MAX_CAS;
+		/* Find highest supported CAS latency */
+		while (!((ctrl->cas_supported >> (val - MIN_CAS)) & 1))
+			val--;
+
+		printk(BIOS_ERR, "Using CAS %uT instead.\n", val);
+	}
+
+	printk(BIOS_DEBUG, "Selected CAS latency   : %uT\n", val);
+	ctrl->CAS = val;
+	ctrl->CWL = get_CWL(ctrl->tCK);
+	printk(BIOS_DEBUG, "Selected CWL latency   : %uT\n", ctrl->CWL);
+
+	/* Find tRCD */
+	ctrl->tRCD = (ctrl->tRCD + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRCD          : %uT\n", ctrl->tRCD);
+
+	ctrl->tRP = (ctrl->tRP + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRP           : %uT\n", ctrl->tRP);
+
+	/* Find tRAS */
+	ctrl->tRAS = (ctrl->tRAS + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRAS          : %uT\n", ctrl->tRAS);
+
+	/* Find tWR */
+	ctrl->tWR = (ctrl->tWR + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tWR           : %uT\n", ctrl->tWR);
+
+	/* Find tFAW */
+	ctrl->tFAW = (ctrl->tFAW + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tFAW          : %uT\n", ctrl->tFAW);
+
+	/* Find tRRD */
+	ctrl->tRRD = (ctrl->tRRD + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRRD          : %uT\n", ctrl->tRRD);
+
+	/* Find tRTP */
+	ctrl->tRTP = (ctrl->tRTP + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRTP          : %uT\n", ctrl->tRTP);
+
+	/* Find tWTR */
+	ctrl->tWTR = (ctrl->tWTR + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tWTR          : %uT\n", ctrl->tWTR);
+
+	/* Refresh-to-Active or Refresh-to-Refresh (tRFC) */
+	ctrl->tRFC = (ctrl->tRFC + ctrl->tCK - 1) / ctrl->tCK;
+	printk(BIOS_DEBUG, "Selected tRFC          : %uT\n", ctrl->tRFC);
+
+	ctrl->tREFI = get_REFI(ctrl->tCK);
+	ctrl->tMOD = get_MOD(ctrl->tCK);
+	ctrl->tXSOffset = get_XSOffset(ctrl->tCK);
+	ctrl->tWLO = get_WLO(ctrl->tCK);
+	ctrl->tCKE = get_CKE(ctrl->tCK);
+	ctrl->tXPDLL = get_XPDLL(ctrl->tCK);
+	ctrl->tXP = get_XP(ctrl->tCK);
+	ctrl->tAONPD = get_AONPD(ctrl->tCK);
+}
+
+static void dram_freq(ramctr_timing * ctrl)
+{
+	if (ctrl->tCK > TCK_400MHZ) {
+		printk (BIOS_ERR, "DRAM frequency is under lowest supported frequency (400 MHz). Increasing to 400 MHz as last resort");
+		ctrl->tCK = TCK_400MHZ;
+	}
+	while (1) {
+		u8 val2;
+		u32 reg1 = 0;
+
+		/* Step 1 - Set target PCU frequency */
+
+		if (ctrl->tCK <= TCK_1066MHZ) {
+			ctrl->tCK = TCK_1066MHZ;
+		} else if (ctrl->tCK <= TCK_933MHZ) {
+			ctrl->tCK = TCK_933MHZ;
+		} else if (ctrl->tCK <= TCK_800MHZ) {
+			ctrl->tCK = TCK_800MHZ;
+		} else if (ctrl->tCK <= TCK_666MHZ) {
+			ctrl->tCK = TCK_666MHZ;
+		} else if (ctrl->tCK <= TCK_533MHZ) {
+			ctrl->tCK = TCK_533MHZ;
+		} else if (ctrl->tCK <= TCK_400MHZ) {
+			ctrl->tCK = TCK_400MHZ;
+		} else {
+			die ("No lock frequency found");
+		}
+
+		/* Frequency multiplier.  */
+		u32 FRQ = get_FRQ(ctrl->tCK);
+
+		/* The PLL will never lock if the required frequency is
+		 * already set. Exit early to prevent a system hang.
+		 */
+		reg1 = MCHBAR32(MC_BIOS_DATA);
+		val2 = (u8) reg1;
+		if (val2)
+			return;
+
+		/* Step 2 - Select frequency in the MCU */
+		reg1 = FRQ;
+		reg1 |= 0x80000000;	// set running bit
+		MCHBAR32(MC_BIOS_REQ) = reg1;
+		int i=0;
+		printk(BIOS_DEBUG, "PLL busy... ");
+		while (reg1 & 0x80000000) {
+			udelay(10);
+			i++;
+			reg1 = MCHBAR32(MC_BIOS_REQ);
+		}
+		printk(BIOS_DEBUG, "done in %d us\n", i * 10);
+
+		/* Step 3 - Verify lock frequency */
+		reg1 = MCHBAR32(MC_BIOS_DATA);
+		val2 = (u8) reg1;
+		if (val2 >= FRQ) {
+			printk(BIOS_DEBUG, "MCU frequency is set at : %d MHz\n",
+			       (1000 << 8) / ctrl->tCK);
+			return;
+		}
+		printk(BIOS_DEBUG, "PLL didn't lock. Retrying at lower frequency\n");
+		ctrl->tCK++;
+	}
+}
+
+static void dram_ioregs(ramctr_timing * ctrl)
+{
+	u32 reg, comp2;
+
+	int channel;
+
+	// IO clock
+	FOR_ALL_CHANNELS {
+		MCHBAR32(0xc00 + 0x100 * channel) = ctrl->rankmap[channel];
+	}
+
+	// IO command
+	FOR_ALL_CHANNELS {
+		MCHBAR32(0x3200 + 0x100 * channel) = ctrl->rankmap[channel];
+	}
+
+	// IO control
+	FOR_ALL_POPULATED_CHANNELS {
+		program_timings(ctrl, channel);
+	}
+
+	// Rcomp
+	printram("RCOMP...");
+	reg = 0;
+	while (reg == 0) {
+		reg = MCHBAR32(0x5084) & 0x10000;
+	}
+	printram("done\n");
+
+	// Set comp2
+	comp2 = get_COMP2(ctrl->tCK);
+	MCHBAR32(0x3714) = comp2;
+	printram("COMP2 done\n");
+
+	// Set comp1
+	FOR_ALL_POPULATED_CHANNELS {
+		reg = MCHBAR32(0x1810 + channel * 0x100);	//ch0
+		reg = (reg & ~0xe00) | (1 << 9);	//odt
+		reg = (reg & ~0xe00000) | (1 << 21);	//clk drive up
+		reg = (reg & ~0x38000000) | (1 << 27);	//ctl drive up
+		MCHBAR32(0x1810 + channel * 0x100) = reg;
+	}
+	printram("COMP1 done\n");
+
+	printram("FORCE RCOMP and wait 20us...");
+	MCHBAR32(0x5f08) |= 0x100;
+	udelay(20);
+	printram("done\n");
+}
+
+int try_init_dram_ddr3_sandy(ramctr_timing *ctrl, int fast_boot,
+		int s3_resume, int me_uma_size)
+{
+	int err;
+
+	printk(BIOS_DEBUG, "Starting RAM training (%d).\n", fast_boot);
+
+	if (!fast_boot) {
+		/* Find fastest common supported parameters */
+		dram_find_common_params(ctrl);
+
+		dram_dimm_mapping(ctrl);
+	}
+
+	/* Set MCU frequency */
+	dram_freq(ctrl);
+
+	if (!fast_boot) {
+		/* Calculate timings */
+		dram_timing(ctrl);
+	}
+
+	/* Set version register */
+	MCHBAR32(0x5034) = 0xC04EB002;
+
+	/* Enable crossover */
+	dram_xover(ctrl);
+
+	/* Set timing and refresh registers */
+	dram_timing_regs(ctrl);
+
+	/* Power mode preset */
+	MCHBAR32(0x4e80) = 0x5500;
+
+	/* Set scheduler parameters */
+	MCHBAR32(0x4c20) = 0x10100005;
+
+	/* Set CPU specific register */
+	set_4f8c();
+
+	/* Clear IO reset bit */
+	MCHBAR32(0x5030) &= ~0x20;
+
+	/* Set MAD-DIMM registers */
+	dram_dimm_set_mapping(ctrl);
+	printk(BIOS_DEBUG, "Done dimm mapping\n");
+
+	/* Zone config */
+	dram_zones(ctrl, 1);
+
+	/* Set memory map */
+	dram_memorymap(ctrl, me_uma_size);
+	printk(BIOS_DEBUG, "Done memory map\n");
+
+	/* Set IO registers */
+	dram_ioregs(ctrl);
+	printk(BIOS_DEBUG, "Done io registers\n");
+
+	udelay(1);
+
+	if (fast_boot) {
+		restore_timings(ctrl);
+	} else {
+		/* Do jedec ddr3 reset sequence */
+		dram_jedecreset(ctrl);
+		printk(BIOS_DEBUG, "Done jedec reset\n");
+
+		/* MRS commands */
+		dram_mrscommands(ctrl);
+		printk(BIOS_DEBUG, "Done MRS commands\n");
+
+		/* Prepare for memory training */
+		prepare_training(ctrl);
+
+		err = read_training(ctrl);
+		if (err)
+			return err;
+
+		err = write_training(ctrl);
+		if (err)
+			return err;
+
+		printram("CP5a\n");
+
+		err = discover_edges(ctrl);
+		if (err)
+			return err;
+
+		printram("CP5b\n");
+
+		err = command_training(ctrl);
+		if (err)
+			return err;
+
+		printram("CP5c\n");
+
+		err = discover_edges_write(ctrl);
+		if (err)
+			return err;
+
+		err = discover_timC_write(ctrl);
+		if (err)
+			return err;
+
+		normalize_training(ctrl);
+	}
+
+	set_4008c(ctrl);
+
+	write_controller_mr(ctrl);
+
+	if (!s3_resume) {
+		err = channel_test(ctrl);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}