path: root/config/coreboot/haswell/patches/0016-Haswell-NRI-Implement-fast-boot-path.patch

From c7d6a901edf648f0f02dd2053337bcf3a319e49b Mon Sep 17 00:00:00 2001
From: Angel Pons <th3fanbus@gmail.com>
Date: Sat, 13 Apr 2024 01:16:30 +0200
Subject: [PATCH 16/20] Haswell NRI: Implement fast boot path

When the memory configuration hasn't changed, there is no need to do
full memory training. Instead, boot firmware can use saved training
data to reinitialise the memory controller and memory.

Unlike native RAM init for other platforms, Haswell does not save the
main structure (the "mighty ctrl" struct) to flash. Instead, separate
structures define the data to be saved, which can be smaller than the
main structure.

This makes S3 suspend and resume work: RAM contents MUST be preserved
for a S3 resume to succeed, but RAM training destroys RAM contents.

Change-Id: I06f6cd39ceecdca104fae89159f28e85cf7ff4e6
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
---
 .../intel/haswell/native_raminit/Makefile.mk  |   1 +
 .../haswell/native_raminit/activate_mc.c      |  17 +
 .../intel/haswell/native_raminit/ddr3.c       |  41 ++
 .../haswell/native_raminit/raminit_main.c     |  34 +-
 .../haswell/native_raminit/raminit_native.c   |  30 +-
 .../haswell/native_raminit/raminit_native.h   |  18 +
 .../haswell/native_raminit/save_restore.c     | 387 ++++++++++++++++++
 7 files changed, 504 insertions(+), 24 deletions(-)
 create mode 100644 src/northbridge/intel/haswell/native_raminit/save_restore.c

diff --git a/src/northbridge/intel/haswell/native_raminit/Makefile.mk b/src/northbridge/intel/haswell/native_raminit/Makefile.mk
index d97da72890..8fdd17c542 100644
--- a/src/northbridge/intel/haswell/native_raminit/Makefile.mk
+++ b/src/northbridge/intel/haswell/native_raminit/Makefile.mk
@@ -13,6 +13,7 @@ romstage-y += raminit_main.c
 romstage-y += raminit_native.c
 romstage-y += ranges.c
 romstage-y += reut.c
+romstage-y += save_restore.c
 romstage-y += setup_wdb.c
 romstage-y += spd_bitmunching.c
 romstage-y += testing_io.c
diff --git a/src/northbridge/intel/haswell/native_raminit/activate_mc.c b/src/northbridge/intel/haswell/native_raminit/activate_mc.c
index 78a7ad27ef..0b3eb917da 100644
--- a/src/northbridge/intel/haswell/native_raminit/activate_mc.c
+++ b/src/northbridge/intel/haswell/native_raminit/activate_mc.c
@@ -333,6 +333,23 @@ enum raminit_status activate_mc(struct sysinfo *ctrl)
 	return RAMINIT_STATUS_SUCCESS;
 }
 
+enum raminit_status normal_state(struct sysinfo *ctrl)
+{
+	/* Enable periodic COMP */
+	mchbar_write32(M_COMP, (union pcu_comp_reg) {
+		.comp_interval = COMP_INT,
+	}.raw);
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		if (!does_ch_exist(ctrl, channel))
+			continue;
+
+		/* Set MC to normal mode and clean the ODT and CKE */
+		mchbar_write32(REUT_ch_SEQ_CFG(channel), REUT_MODE_NOP << 12);
+	}
+	power_down_config(ctrl);
+	return RAMINIT_STATUS_SUCCESS;
+}
+
 static void mc_lockdown(void)
 {
 	/* Lock memory controller registers */
diff --git a/src/northbridge/intel/haswell/native_raminit/ddr3.c b/src/northbridge/intel/haswell/native_raminit/ddr3.c
index 6ddb11488b..9b6368edb1 100644
--- a/src/northbridge/intel/haswell/native_raminit/ddr3.c
+++ b/src/northbridge/intel/haswell/native_raminit/ddr3.c
@@ -2,6 +2,7 @@
 
 #include <assert.h>
 #include <console/console.h>
+#include <delay.h>
 #include <northbridge/intel/haswell/haswell.h>
 #include <types.h>
 
@@ -215,3 +216,43 @@ enum raminit_status ddr3_jedec_init(struct sysinfo *ctrl)
 	ddr3_program_mr0(ctrl, 1);
 	return reut_issue_zq(ctrl, ctrl->chanmap, ZQ_INIT);
 }
+
+enum raminit_status exit_selfrefresh(struct sysinfo *ctrl)
+{
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		if (!does_ch_exist(ctrl, channel))
+			continue;
+
+		/* Fields in ctrl aren't populated on a warm boot */
+		union ddr_data_control_0_reg data_control_0 = {
+			.raw = mchbar_read32(DQ_CONTROL_0(channel, 0)),
+		};
+		data_control_0.read_rf_rd = 1;
+		for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) {
+			if (!rank_in_ch(ctrl, rank, channel))
+				continue;
+
+			data_control_0.read_rf_rank = rank;
+			mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), data_control_0.raw);
+		}
+	}
+
+	/* Time needed to stabilize the DCLK (~6 us) */
+	udelay(6);
+
+	/* Pull the DIMMs out of self refresh by asserting CKE high */
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		const union reut_misc_cke_ctrl_reg reut_misc_cke_ctrl = {
+			.cke_on = ctrl->rankmap[channel],
+		};
+		mchbar_write32(REUT_ch_MISC_CKE_CTRL(channel), reut_misc_cke_ctrl.raw);
+	}
+	mchbar_write32(REUT_MISC_ODT_CTRL, 0);
+
+	const enum raminit_status status = reut_issue_zq(ctrl, ctrl->chanmap, ZQ_LONG);
+	if (status) {
+		/* ZQCL errors don't seem to be a fatal problem here */
+		printk(BIOS_ERR, "ZQ Long failed during S3 resume or warm reset flow\n");
+	}
+	return RAMINIT_STATUS_SUCCESS;
+}
diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_main.c b/src/northbridge/intel/haswell/native_raminit/raminit_main.c
index 3a65fb01fb..056dde1adc 100644
--- a/src/northbridge/intel/haswell/native_raminit/raminit_main.c
+++ b/src/northbridge/intel/haswell/native_raminit/raminit_main.c
@@ -64,6 +64,22 @@ static const struct task_entry cold_boot[] = {
 	{ train_read_mpr,                                         true, "RDMPRT",     },
 	{ train_jedec_write_leveling,                             true, "JWRL",       },
 	{ activate_mc,                                            true, "ACTIVATE",   },
+	{ save_training_values,                                   true, "SAVE_TRAIN", },
+	{ save_non_training,                                      true, "SAVE_NONT",  },
+	{ raminit_done,                                           true, "RAMINITEND", },
+};
+
+static const struct task_entry fast_boot[] = {
+	{ collect_spd_info,                                       true, "PROCSPD",    },
+	{ restore_non_training,                                   true, "RST_NONT",   },
+	{ initialise_mpll,                                        true, "INITMPLL",   },
+	{ configure_mc,                                           true, "CONFMC",     },
+	{ configure_memory_map,                                   true, "MEMMAP",     },
+	{ do_jedec_init,                                          true, "JEDECINIT",  },
+	{ pre_training,                                           true, "PRETRAIN",   },
+	{ restore_training_values,                                true, "RST_TRAIN",  },
+	{ exit_selfrefresh,                                       true, "EXIT_SR",    },
+	{ normal_state,                                           true, "NORMALMODE", },
 	{ raminit_done,                                           true, "RAMINITEND", },
 };
 
@@ -102,11 +118,11 @@ static void initialize_ctrl(struct sysinfo *ctrl)
 	ctrl->bootmode = bootmode;
 }
 
-static enum raminit_status try_raminit(struct sysinfo *ctrl)
+static enum raminit_status try_raminit(
+	struct sysinfo *ctrl,
+	const struct task_entry *const schedule,
+	const size_t length)
 {
-	const struct task_entry *const schedule = cold_boot;
-	const size_t length = ARRAY_SIZE(cold_boot);
-
 	enum raminit_status status = RAMINIT_STATUS_UNSPECIFIED_ERROR;
 
 	for (size_t i = 0; i < length; i++) {
@@ -140,8 +156,16 @@ void raminit_main(const enum raminit_boot_mode bootmode)
 	mighty_ctrl.bootmode = bootmode;
 	initialize_ctrl(&mighty_ctrl);
 
+	enum raminit_status status = RAMINIT_STATUS_UNSPECIFIED_ERROR;
+
+	if (bootmode != BOOTMODE_COLD) {
+		status = try_raminit(&mighty_ctrl, fast_boot, ARRAY_SIZE(fast_boot));
+		if (status == RAMINIT_STATUS_SUCCESS)
+			return;
+	}
+
 	/** TODO: Try more than once **/
-	enum raminit_status status = try_raminit(&mighty_ctrl);
+	status = try_raminit(&mighty_ctrl, cold_boot, ARRAY_SIZE(cold_boot));
 
 	if (status != RAMINIT_STATUS_SUCCESS)
 		die("Memory initialization was met with utmost failure and misery\n");
diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_native.c b/src/northbridge/intel/haswell/native_raminit/raminit_native.c
index 5f7ceec222..3ad8ce29e7 100644
--- a/src/northbridge/intel/haswell/native_raminit/raminit_native.c
+++ b/src/northbridge/intel/haswell/native_raminit/raminit_native.c
@@ -54,23 +54,17 @@ static bool early_init_native(enum raminit_boot_mode bootmode)
 	return cpu_replaced;
 }
 
-#define MRC_CACHE_VERSION 1
-
-struct mrc_data {
-	const void *buffer;
-	size_t buffer_len;
-};
-
-static void save_mrc_data(struct mrc_data *md)
+static void save_mrc_data(void)
 {
-	mrc_cache_stash_data(MRC_TRAINING_DATA, MRC_CACHE_VERSION, md->buffer, md->buffer_len);
+	mrc_cache_stash_data(MRC_TRAINING_DATA, reg_frame_rev(),
+			     reg_frame_ptr(), reg_frame_size());
 }
 
 static struct mrc_data prepare_mrc_cache(void)
 {
 	struct mrc_data md = {0};
 	md.buffer = mrc_cache_current_mmap_leak(MRC_TRAINING_DATA,
-						MRC_CACHE_VERSION,
+						reg_frame_rev(),
 						&md.buffer_len);
 	return md;
 }
@@ -94,14 +88,15 @@ static void raminit_reset(void)
 }
 
 static enum raminit_boot_mode do_actual_raminit(
-	struct mrc_data *md,
 	const bool s3resume,
 	const bool cpu_replaced,
 	const enum raminit_boot_mode orig_bootmode)
 {
+	struct mrc_data md = prepare_mrc_cache();
+
 	enum raminit_boot_mode bootmode = orig_bootmode;
 
-	bool save_data_valid = md->buffer && md->buffer_len == USHRT_MAX; /** TODO: sizeof() **/
+	bool save_data_valid = md.buffer && md.buffer_len == reg_frame_size();
 
 	if (s3resume) {
 		if (bootmode == BOOTMODE_COLD) {
@@ -154,7 +149,7 @@ static enum raminit_boot_mode do_actual_raminit(
 	assert(save_data_valid != (bootmode == BOOTMODE_COLD));
 	if (save_data_valid) {
 		printk(BIOS_INFO, "Using cached memory parameters\n");
-		die("RAMINIT: Fast boot is not yet implemented\n");
+		memcpy(reg_frame_ptr(), md.buffer, reg_frame_size());
 	}
 	printk(RAM_DEBUG, "Initial bootmode: %s\n", bm_names[orig_bootmode]);
 	printk(RAM_DEBUG, "Current bootmode: %s\n", bm_names[bootmode]);
@@ -181,10 +176,8 @@ void perform_raminit(const int s3resume)
 	wait_txt_clear();
 	wrmsr(0x2e6, (msr_t) {.lo = 0, .hi = 0});
 
-	struct mrc_data md = prepare_mrc_cache();
-
 	const enum raminit_boot_mode bootmode =
-			do_actual_raminit(&md, s3resume, cpu_replaced, orig_bootmode);
+			do_actual_raminit(s3resume, cpu_replaced, orig_bootmode);
 
 	/** TODO: report_memory_config **/
 
@@ -212,9 +205,8 @@ void perform_raminit(const int s3resume)
 	}
 
 	/* Save training data on non-S3 resumes */
-	/** TODO: Enable this once training data is populated **/
-	if (0 && !s3resume)
-		save_mrc_data(&md);
+	if (!s3resume)
+		save_mrc_data();
 
 	/** TODO: setup_sdram_meminfo **/
 }
diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_native.h b/src/northbridge/intel/haswell/native_raminit/raminit_native.h
index 9bab57b518..0750904aec 100644
--- a/src/northbridge/intel/haswell/native_raminit/raminit_native.h
+++ b/src/northbridge/intel/haswell/native_raminit/raminit_native.h
@@ -169,6 +169,8 @@ enum regfile_mode {
 	REG_FILE_USE_CURRENT,	/* Used when changing parameters after the test */
 };
 
+struct register_save_frame;
+
 struct wdb_pat {
 	uint32_t start_ptr;	/* Starting pointer in WDB */
 	uint32_t stop_ptr;	/* Stopping pointer in WDB */
@@ -219,6 +221,7 @@ enum raminit_status {
 	RAMINIT_STATUS_RCVEN_FAILURE,
 	RAMINIT_STATUS_RMPR_FAILURE,
 	RAMINIT_STATUS_JWRL_FAILURE,
+	RAMINIT_STATUS_INVALID_CACHE,
 	RAMINIT_STATUS_UNSPECIFIED_ERROR, /** TODO: Deprecated in favor of specific values **/
 };
 
@@ -228,6 +231,11 @@ enum generic_stepping {
 	STEPPING_C0 = 3,
 };
 
+struct mrc_data {
+	const void *buffer;
+	size_t buffer_len;
+};
+
 struct raminit_dimm_info {
 	spd_raw_data raw_spd;
 	struct dimm_attr_ddr3_st data;
@@ -447,12 +455,22 @@ enum raminit_status do_jedec_init(struct sysinfo *ctrl);
 enum raminit_status train_receive_enable(struct sysinfo *ctrl);
 enum raminit_status train_read_mpr(struct sysinfo *ctrl);
 enum raminit_status train_jedec_write_leveling(struct sysinfo *ctrl);
+enum raminit_status save_training_values(struct sysinfo *ctrl);
+enum raminit_status restore_training_values(struct sysinfo *ctrl);
+enum raminit_status save_non_training(struct sysinfo *ctrl);
+enum raminit_status restore_non_training(struct sysinfo *ctrl);
+enum raminit_status exit_selfrefresh(struct sysinfo *ctrl);
+enum raminit_status normal_state(struct sysinfo *ctrl);
 enum raminit_status activate_mc(struct sysinfo *ctrl);
 enum raminit_status raminit_done(struct sysinfo *ctrl);
 
 void configure_timings(struct sysinfo *ctrl);
 void configure_refresh(struct sysinfo *ctrl);
 
+struct register_save_frame *reg_frame_ptr(void);
+size_t reg_frame_size(void);
+uint32_t reg_frame_rev(void);
+
 uint32_t get_tCKE(uint32_t mem_clock_mhz, bool lpddr);
 uint32_t get_tXPDLL(uint32_t mem_clock_mhz);
 uint32_t get_tAONPD(uint32_t mem_clock_mhz);
diff --git a/src/northbridge/intel/haswell/native_raminit/save_restore.c b/src/northbridge/intel/haswell/native_raminit/save_restore.c
new file mode 100644
index 0000000000..f1f50e3ff8
--- /dev/null
+++ b/src/northbridge/intel/haswell/native_raminit/save_restore.c
@@ -0,0 +1,387 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <assert.h>
+#include <console/console.h>
+#include <northbridge/intel/haswell/haswell.h>
+#include <types.h>
+
+#include "raminit_native.h"
+
+uint32_t reg_frame_rev(void)
+{
+	/*
+	 * Equivalent to MRC_CACHE_REVISION, but hidden via abstraction.
+	 * The structures that get saved to flash are contained within
+	 * this translation unit, so changes outside this file shouldn't
+	 * require invalidating the cache.
+	 */
+	return 1;
+}
+
+struct register_save {
+	uint16_t lower;
+	uint16_t upper;
+};
+
+/** TODO: Haswell DDRIO aliases writes: 0x80 .. 0xff => 0x00 .. 0x7f **/
+static const struct register_save ddrio_per_byte_list[] = {
+	{0x0000, 0x003c}, /* 16 registers */
+//	{0x0048, 0x0084}, /* 16 registers */	/** TODO: BDW support **/
+	{0x0048, 0x004c}, /*  2 registers */
+	{0x005c, 0x0078}, /*  8 registers */
+};
+#define DDRIO_PER_BYTE_REGISTER_COUNT	(16 + 2 + 8)
+
+static const struct register_save ddrio_per_ch_list[] = {
+	/* CKE */
+	{0x1204, 0x1208}, /* 2 registers */
+	{0x1214, 0x121c}, /* 3 registers */
+	/* CMD North */
+	{0x1404, 0x140c}, /* 3 registers */
+	/* CLK */
+	{0x1808, 0x1810}, /* 3 registers */
+	/* CMD South */
+	{0x1a04, 0x1a0c}, /* 3 registers */
+	/* CTL */
+	{0x1c14, 0x1c1c}, /* 3 registers */
+};
+#define DDRIO_PER_CH_REGISTER_COUNT	(2 + 3 * 5)
+
+static const struct register_save ddrio_common_list[] = {
+	{0x2000, 0x2008}, /* 3 registers */
+	{0x3a14, 0x3a1c}, /* 3 registers */
+	{0x3a24, 0x3a24}, /* 1 registers */
+};
+
+#define DDRIO_COMMON_REGISTER_COUNT	(3 + 3 + 1)
+
+static const struct register_save mcmain_per_ch_list[] = {
+	{0x4000, 0x4014}, /* 6 registers */
+	{0x4024, 0x4028}, /* 2 registers */
+	{0x40d0, 0x40d0}, /* 1 registers */
+	{0x4220, 0x4224}, /* 2 registers */
+	{0x4294, 0x4294}, /* 1 registers */
+	{0x429c, 0x42a0}, /* 2 registers */
+	{0x42ec, 0x42fc}, /* 5 registers */
+	{0x4328, 0x4328}, /* 1 registers */
+	{0x438c, 0x4390}, /* 2 registers */
+};
+#define MCMAIN_PER_CH_REGISTER_COUNT	(6 + 2 + 1 + 2 + 1 + 2 + 5 + 1 + 2)
+
+static const struct register_save misc_common_list[] = {
+	{0x5884, 0x5888}, /*  2 registers */
+	{0x5890, 0x589c}, /*  4 registers */
+	{0x58a4, 0x58a4}, /*  1 registers */
+	{0x58d0, 0x58e4}, /*  6 registers */
+	{0x5880, 0x5880}, /*  1 registers */
+	{0x5000, 0x50dc}, /* 56 registers */
+	{0x59b8, 0x59b8}  /*  1 registers */
+};
+#define MISC_COMMON_REGISTER_COUNT	(2 + 4 + 1 + 6 + 1 + 56 + 1)
+
+struct save_params {
+	bool is_initialised;
+
+	/* Memory base frequency, either 100 or 133 MHz */
+	uint8_t base_freq;
+
+	/* Multiplier */
+	uint32_t multiplier;
+
+	/* Memory clock in MHz */
+	uint32_t mem_clock_mhz;
+
+	/* Memory clock in femtoseconds */
+	uint32_t mem_clock_fs;
+
+	/* Quadrature clock in picoseconds */
+	uint16_t qclkps;
+
+	/* Bitfield of supported CAS latencies */
+	uint16_t cas_supported;
+
+	/* CPUID value */
+	uint32_t cpu;
+
+	/* Cached CPU stepping value */
+	uint8_t stepping;
+
+	uint16_t vdd_mv;
+
+	union dimm_flags_ddr3_st flags;
+
+	/* Except for tCK, everything is stored in DCLKs */
+	uint32_t tCK;
+	uint32_t tAA;
+	uint32_t tWR;
+	uint32_t tRCD;
+	uint32_t tRRD;
+	uint32_t tRP;
+	uint32_t tRAS;
+	uint32_t tRC;
+	uint32_t tRFC;
+	uint32_t tWTR;
+	uint32_t tRTP;
+	uint32_t tFAW;
+	uint32_t tCWL;
+	uint32_t tCMD;
+
+	uint32_t tREFI;
+	uint32_t tXP;
+
+	uint8_t lpddr_cke_rank_map[NUM_CHANNELS];
+
+	struct raminit_dimm_info dimms[NUM_CHANNELS][NUM_SLOTS];
+
+	uint8_t chanmap;
+
+	uint32_t channel_size_mb[NUM_CHANNELS];
+
+	/* DIMMs per channel */
+	uint8_t dpc[NUM_CHANNELS];
+
+	uint8_t rankmap[NUM_CHANNELS];
+
+	/* Whether a rank is mirrored or not (only rank 1 of each DIMM can be) */
+	uint8_t rank_mirrored[NUM_CHANNELS];
+
+	/*
+	 * FIXME: LPDDR support is incomplete. The largest chunks are missing,
+	 * but some LPDDR-specific variations in algorithms have been handled.
+	 * LPDDR-specific functions have stubs which will halt upon execution.
+	 */
+	bool lpddr;
+
+	uint8_t lanes;
+
+	/* FIXME: ECC support missing */
+	bool is_ecc;
+};
+
+struct register_save_frame {
+	uint32_t ddrio_per_byte[NUM_CHANNELS][NUM_LANES][DDRIO_PER_BYTE_REGISTER_COUNT];
+	uint32_t ddrio_per_ch[NUM_CHANNELS][DDRIO_PER_CH_REGISTER_COUNT];
+	uint32_t ddrio_common[DDRIO_COMMON_REGISTER_COUNT];
+	uint32_t mcmain_per_ch[NUM_CHANNELS][MCMAIN_PER_CH_REGISTER_COUNT];
+	uint32_t misc_common[MISC_COMMON_REGISTER_COUNT];
+	struct save_params params;
+};
+
+struct register_save_frame *reg_frame_ptr(void)
+{
+	/* The chonky register save frame struct, used for fast boot and S3 resume */
+	static struct register_save_frame register_frame = { 0 };
+	return &register_frame;
+}
+
+size_t reg_frame_size(void)
+{
+	return sizeof(struct register_save_frame);
+}
+
+typedef void (*reg_func_t)(const uint16_t offset, uint32_t *const value);
+
+static void save_value(const uint16_t offset, uint32_t *const value)
+{
+	*value = mchbar_read32(offset);
+}
+
+static void restore_value(const uint16_t offset, uint32_t *const value)
+{
+	mchbar_write32(offset, *value);
+}
+
+static void save_restore(
+	uint32_t *reg_frame,
+	const uint16_t g_offset,
+	const struct register_save *reg_save_list,
+	const size_t reg_save_length,
+	reg_func_t handle_reg)
+{
+	for (size_t i = 0; i < reg_save_length; i++) {
+		const struct register_save *entry = &reg_save_list[i];
+		for (uint16_t offset = entry->lower; offset <= entry->upper; offset += 4) {
+			handle_reg(offset + g_offset, reg_frame++);
+		}
+	}
+}
+
+static void save_restore_all(struct register_save_frame *reg_frame, reg_func_t handle_reg)
+{
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		for (uint8_t byte = 0; byte < NUM_LANES; byte++) {
+			const uint16_t g_offset = _DDRIO_C_R_B(0, channel, 0, byte);
+			save_restore(
+				reg_frame->ddrio_per_byte[channel][byte],
+				g_offset,
+				ddrio_per_byte_list,
+				ARRAY_SIZE(ddrio_per_byte_list),
+				handle_reg);
+		}
+	}
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		const uint16_t g_offset = _DDRIO_C_R_B(0, channel, 0, 0);
+		save_restore(
+			reg_frame->ddrio_per_ch[channel],
+			g_offset,
+			ddrio_per_ch_list,
+			ARRAY_SIZE(ddrio_per_ch_list),
+			handle_reg);
+	}
+	save_restore(
+		reg_frame->ddrio_common,
+		0,
+		ddrio_common_list,
+		ARRAY_SIZE(ddrio_common_list),
+		handle_reg);
+
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		const uint16_t g_offset = _MCMAIN_C(0, channel);
+		save_restore(
+			reg_frame->mcmain_per_ch[channel],
+			g_offset,
+			mcmain_per_ch_list,
+			ARRAY_SIZE(mcmain_per_ch_list),
+			handle_reg);
+	}
+	save_restore(
+		reg_frame->misc_common,
+		0,
+		misc_common_list,
+		ARRAY_SIZE(misc_common_list),
+		handle_reg);
+}
+
+enum raminit_status save_training_values(struct sysinfo *ctrl)
+{
+	save_restore_all(reg_frame_ptr(), save_value);
+	return RAMINIT_STATUS_SUCCESS;
+}
+
+enum raminit_status restore_training_values(struct sysinfo *ctrl)
+{
+	save_restore_all(reg_frame_ptr(), restore_value);
+	return RAMINIT_STATUS_SUCCESS;
+}
+
+enum raminit_status save_non_training(struct sysinfo *ctrl)
+{
+	struct register_save_frame *reg_frame = reg_frame_ptr();
+	struct save_params *params = &reg_frame->params;
+
+	params->is_initialised = true;
+
+	params->base_freq     = ctrl->base_freq;
+	params->multiplier    = ctrl->multiplier;
+	params->mem_clock_mhz = ctrl->mem_clock_mhz;
+	params->mem_clock_fs  = ctrl->mem_clock_fs;
+	params->qclkps        = ctrl->qclkps;
+	params->cas_supported = ctrl->cas_supported;
+	params->cpu           = ctrl->cpu;
+	params->stepping      = ctrl->stepping;
+	params->vdd_mv        = ctrl->vdd_mv;
+	params->flags         = ctrl->flags;
+
+	params->tCK       = ctrl->tCK;
+	params->tAA       = ctrl->tAA;
+	params->tWR       = ctrl->tWR;
+	params->tRCD      = ctrl->tRCD;
+	params->tRRD      = ctrl->tRRD;
+	params->tRP       = ctrl->tRP;
+	params->tRAS      = ctrl->tRAS;
+	params->tRC       = ctrl->tRC;
+	params->tRFC      = ctrl->tRFC;
+	params->tWTR      = ctrl->tWTR;
+	params->tRTP      = ctrl->tRTP;
+	params->tFAW      = ctrl->tFAW;
+	params->tCWL      = ctrl->tCWL;
+	params->tCMD      = ctrl->tCMD;
+	params->tREFI     = ctrl->tREFI;
+	params->tXP       = ctrl->tXP;
+
+	params->chanmap = ctrl->chanmap;
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		params->lpddr_cke_rank_map[channel] = ctrl->lpddr_cke_rank_map[channel];
+		for (uint8_t slot = 0; slot < NUM_SLOTS; slot++)
+			params->dimms[channel][slot] = ctrl->dimms[channel][slot];
+	}
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		params->dpc[channel] = ctrl->dpc[channel];
+		params->rankmap[channel] = ctrl->rankmap[channel];
+		params->rank_mirrored[channel] = ctrl->rank_mirrored[channel];
+		params->channel_size_mb[channel] = ctrl->channel_size_mb[channel];
+	}
+	params->lpddr = ctrl->lpddr;
+	params->lanes = ctrl->lanes;
+	params->is_ecc = ctrl->is_ecc;
+	return RAMINIT_STATUS_SUCCESS;
+}
+
+#define RAMINIT_COMPARE(_s1, _s2) \
+	((sizeof(_s1) == sizeof(_s2)) && !memcmp(_s1, _s2, sizeof(_s1)))
+
+enum raminit_status restore_non_training(struct sysinfo *ctrl)
+{
+	struct register_save_frame *reg_frame = reg_frame_ptr();
+	struct save_params *params = &reg_frame->params;
+
+	if (!params->is_initialised) {
+		printk(BIOS_WARNING, "Cannot fast boot: saved data is invalid\n");
+		return RAMINIT_STATUS_INVALID_CACHE;
+	}
+
+	if (!RAMINIT_COMPARE(ctrl->dimms, params->dimms)) {
+		printk(BIOS_WARNING, "Cannot fast boot: DIMMs have changed\n");
+		return RAMINIT_STATUS_INVALID_CACHE;
+	}
+
+	if (ctrl->cpu != params->cpu) {
+		printk(BIOS_WARNING, "Cannot fast boot: CPU has changed\n");
+		return RAMINIT_STATUS_INVALID_CACHE;
+	}
+
+	ctrl->base_freq     = params->base_freq;
+	ctrl->multiplier    = params->multiplier;
+	ctrl->mem_clock_mhz = params->mem_clock_mhz;
+	ctrl->mem_clock_fs  = params->mem_clock_fs;
+	ctrl->qclkps        = params->qclkps;
+	ctrl->cas_supported = params->cas_supported;
+	ctrl->cpu           = params->cpu;
+	ctrl->stepping      = params->stepping;
+	ctrl->vdd_mv        = params->vdd_mv;
+	ctrl->flags         = params->flags;
+
+	ctrl->tCK       = params->tCK;
+	ctrl->tAA       = params->tAA;
+	ctrl->tWR       = params->tWR;
+	ctrl->tRCD      = params->tRCD;
+	ctrl->tRRD      = params->tRRD;
+	ctrl->tRP       = params->tRP;
+	ctrl->tRAS      = params->tRAS;
+	ctrl->tRC       = params->tRC;
+	ctrl->tRFC      = params->tRFC;
+	ctrl->tWTR      = params->tWTR;
+	ctrl->tRTP      = params->tRTP;
+	ctrl->tFAW      = params->tFAW;
+	ctrl->tCWL      = params->tCWL;
+	ctrl->tCMD      = params->tCMD;
+	ctrl->tREFI     = params->tREFI;
+	ctrl->tXP       = params->tXP;
+
+	ctrl->chanmap = params->chanmap;
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		ctrl->lpddr_cke_rank_map[channel] = params->lpddr_cke_rank_map[channel];
+		for (uint8_t slot = 0; slot < NUM_SLOTS; slot++)
+			ctrl->dimms[channel][slot] = params->dimms[channel][slot];
+	}
+	for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+		ctrl->dpc[channel] = params->dpc[channel];
+		ctrl->rankmap[channel] = params->rankmap[channel];
+		ctrl->rank_mirrored[channel] = params->rank_mirrored[channel];
+		ctrl->channel_size_mb[channel] = params->channel_size_mb[channel];
+	}
+	ctrl->lpddr = params->lpddr;
+	ctrl->lanes = params->lanes;
+	ctrl->is_ecc = params->is_ecc;
+	return RAMINIT_STATUS_SUCCESS;
+}
-- 
2.39.2