soc/intel/jasperlake: Add Jasper Lake SoC support

This is a copy patch from Tiger Lake SoC code.

The only changes done on top of copy is changing below configs:
1. SOC_INTEL_TIGERLAKE -> SOC_INTEL_TIGERLAKE_COPY
2. SOC_INTEL_JASPERLAKE -> SOC_INTEL_JASPERLAKE_COPY
3. SOC_INTEL_TIGERLAKE_BASE -> SOC_INTEL_TIGERLAKE_BASE_COPY

We started with initial assumption that JSL and TGL can co-exist.
But now we see the SoC code in Tiger Lake is relying on too many
compile-time directives to make two SoCs co-exist. Some of the
differences are listed below:

-> Kconfig: Multiple Kconfig options using
   if SOC_INTEL_{TIGERLAKE/JASPERLAKE}

-> GPIO: GPIO communities have their own differences.
   This requires conditional checks in gpio.asl, gpio.c, gpio*.h,
   pmc.h and gpio.asl

-> PCI IRQs: Set up differently for JSL and TGL

-> PCIe: Number of Root ports differ.

-> eMMC/SD: Only supported on JSL.

-> USB: Number of USB port are different for JSL and TGL.

-> Memory configuration parameters are different for JSL and TGL.

-> FSP parameters for JSL and TGL are different.

The split of JSL and TGL SoC code is planned as below:

1. Copy Tiger Lake SoC code as is, and change SoC Kconfig
   to avoid conflicts with current mainboard builds.

2. Clean up TGL code out of copy patch done in step 1.
   Make it JSL only code. The SoC config still kept as
   SOC_INTEL_JASPERLAKE_COPY.

3. Change JSL SOC Kconfig from SOC_INTEL_JASPERLAKE_COPY to
   SOC_INTEL_JASPERLAKE, dedede and jasperlake_rvp boards can
   bind to SoC code from soc/intel/jasperlake. This step establishes
   Jasper Lake as a separate SoC.

4. Clean up current JSL code from TGL code. This step establishes
   Tiger Lake as a separate SoC.

BUG=b:150217037

Change-Id: I9c33f478a2f8ed5e2d8e7815821d13044d35d388
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39823
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

6 files changed, 580 insertions, 0 deletions

diff --git a/src/soc/intel/jasperlake/romstage/Makefile.inc b/src/soc/intel/jasperlake/romstage/Makefile.inc
new file mode 100644
index 0000000000..ff32916433
--- /dev/null
+++ b/src/soc/intel/jasperlake/romstage/Makefile.inc
@@ -0,0 +1,20 @@
+#
+# This file is part of the coreboot project.
+#
+#
+# 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.
+#
+
+romstage-$(CONFIG_SOC_INTEL_TIGERLAKE_COPY) += fsp_params_tgl.c
+romstage-$(CONFIG_SOC_INTEL_JASPERLAKE_COPY) += fsp_params_jsl.c
+romstage-y += ../../../../cpu/intel/car/romstage.c
+romstage-y += romstage.c
+romstage-y += pch.c
+romstage-y += systemagent.c
diff --git a/src/soc/intel/jasperlake/romstage/fsp_params_jsl.c b/src/soc/intel/jasperlake/romstage/fsp_params_jsl.c
new file mode 100644
index 0000000000..18253aac9c
--- /dev/null
+++ b/src/soc/intel/jasperlake/romstage/fsp_params_jsl.c
@@ -0,0 +1,145 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ *
+ * 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 <assert.h>
+#include <console/console.h>
+#include <fsp/util.h>
+#include <soc/pci_devs.h>
+#include <soc/romstage.h>
+#include <soc/soc_chip.h>
+#include <string.h>
+
+static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
+		const struct soc_intel_tigerlake_config *config)
+{
+	unsigned int i;
+	const struct device *dev = pcidev_path_on_root(SA_DEVFN_IGD);
+	uint32_t mask = 0;
+
+	if (!dev || !dev->enabled) {
+		/* Skip IGD initialization in FSP if device is disabled in devicetree.cb */
+		m_cfg->InternalGfx = 0;
+		m_cfg->IgdDvmt50PreAlloc = 0;
+	} else {
+		m_cfg->InternalGfx = 1;
+		/* Set IGD stolen size to 60MB. */
+		m_cfg->IgdDvmt50PreAlloc = 0xFE;
+	}
+
+	m_cfg->TsegSize = CONFIG_SMM_TSEG_SIZE;
+	m_cfg->IedSize = CONFIG_IED_REGION_SIZE;
+	m_cfg->SaGv = config->SaGv;
+	m_cfg->RMT = config->RMT;
+
+	/* PCIe root port configuration */
+	for (i = 0; i < ARRAY_SIZE(config->PcieRpEnable); i++) {
+		if (config->PcieRpEnable[i])
+			mask |= (1 << i);
+	}
+
+	m_cfg->PcieRpEnableMask = mask;
+
+	_Static_assert(ARRAY_SIZE(m_cfg->PcieClkSrcUsage) >=
+			ARRAY_SIZE(config->PcieClkSrcUsage), "copy buffer overflow!");
+	memcpy(m_cfg->PcieClkSrcUsage, config->PcieClkSrcUsage,
+			sizeof(config->PcieClkSrcUsage));
+
+	_Static_assert(ARRAY_SIZE(m_cfg->PcieClkSrcClkReq) >=
+			ARRAY_SIZE(config->PcieClkSrcClkReq), "copy buffer overflow!");
+	memcpy(m_cfg->PcieClkSrcClkReq, config->PcieClkSrcClkReq,
+			sizeof(config->PcieClkSrcClkReq));
+
+	m_cfg->PrmrrSize = config->PrmrrSize;
+	m_cfg->EnableC6Dram = config->enable_c6dram;
+
+	/* Disable BIOS Guard */
+	m_cfg->BiosGuard = 0;
+
+	/* Set CPU Ratio */
+	m_cfg->CpuRatio = 0;
+
+	/* Set debug interface flags */
+	m_cfg->PcdDebugInterfaceFlags = CONFIG(DRIVERS_UART_8250IO) ?
+			DEBUG_INTERFACE_UART : DEBUG_INTERFACE_SERIAL_IO;
+
+	/* TraceHub configuration */
+	dev = pcidev_path_on_root(PCH_DEVFN_TRACEHUB);
+	if (dev && dev->enabled && config->TraceHubMode) {
+		m_cfg->PcdDebugInterfaceFlags |= DEBUG_INTERFACE_TRACEHUB;
+		m_cfg->PchTraceHubMode = config->TraceHubMode;
+		m_cfg->CpuTraceHubMode = config->TraceHubMode;
+	}
+
+	/* Change VmxEnable UPD value according to ENABLE_VMX Kconfig */
+	m_cfg->VmxEnable = CONFIG(ENABLE_VMX);
+
+
+	/* Enable SMBus controller based on config */
+	m_cfg->SmbusEnable = config->SmbusEnable;
+
+	/* Set debug probe type */
+	m_cfg->PlatformDebugConsent = CONFIG_SOC_INTEL_TIGERLAKE_COPY_DEBUG_CONSENT;
+
+	/* VT-d config */
+	m_cfg->VtdDisable = 0;
+
+	m_cfg->SerialIoUartDebugControllerNumber = CONFIG_UART_FOR_CONSOLE;
+
+	/* Display */
+	m_cfg->DdiPortAConfig = config->DdiPortAConfig;
+	m_cfg->DdiPortBHpd = config->DdiPortBHpd;
+	m_cfg->DdiPortCHpd = config->DdiPortCHpd;
+	m_cfg->DdiPortBDdc = config->DdiPortBDdc;
+	m_cfg->DdiPortCDdc = config->DdiPortCDdc;
+
+	/* Audio */
+	dev = pcidev_path_on_root(PCH_DEVFN_HDA);
+	if (!dev)
+		m_cfg->PchHdaEnable = 0;
+	else
+		m_cfg->PchHdaEnable = dev->enabled;
+
+	m_cfg->PchHdaDspEnable = config->PchHdaDspEnable;
+	m_cfg->PchHdaAudioLinkHdaEnable = config->PchHdaAudioLinkHdaEnable;
+
+	_Static_assert(ARRAY_SIZE(m_cfg->PchHdaAudioLinkDmicEnable) >=
+			ARRAY_SIZE(config->PchHdaAudioLinkDmicEnable), "copy buffer overflow!");
+	memcpy(m_cfg->PchHdaAudioLinkDmicEnable, config->PchHdaAudioLinkDmicEnable,
+		sizeof(config->PchHdaAudioLinkDmicEnable));
+
+	_Static_assert(ARRAY_SIZE(m_cfg->PchHdaAudioLinkSspEnable) >=
+			ARRAY_SIZE(config->PchHdaAudioLinkSspEnable), "copy buffer overflow!");
+	memcpy(m_cfg->PchHdaAudioLinkSspEnable, config->PchHdaAudioLinkSspEnable,
+		sizeof(config->PchHdaAudioLinkSspEnable));
+
+	_Static_assert(ARRAY_SIZE(m_cfg->PchHdaAudioLinkSndwEnable) >=
+			ARRAY_SIZE(config->PchHdaAudioLinkSndwEnable), "copy buffer overflow!");
+	memcpy(m_cfg->PchHdaAudioLinkSndwEnable, config->PchHdaAudioLinkSndwEnable,
+		sizeof(config->PchHdaAudioLinkSndwEnable));
+}
+
+void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version)
+{
+	const struct soc_intel_tigerlake_config *config = config_of_soc();
+	FSP_M_CONFIG *m_cfg = &mupd->FspmConfig;
+
+	soc_memory_init_params(m_cfg, config);
+
+	mainboard_memory_init_params(mupd);
+}
+
+__weak void mainboard_memory_init_params(FSPM_UPD *mupd)
+{
+	printk(BIOS_DEBUG, "WEAK: %s/%s called\n", __FILE__, __func__);
+}
diff --git a/src/soc/intel/jasperlake/romstage/fsp_params_tgl.c b/src/soc/intel/jasperlake/romstage/fsp_params_tgl.c
new file mode 100644
index 0000000000..ac1a507270
--- /dev/null
+++ b/src/soc/intel/jasperlake/romstage/fsp_params_tgl.c
@@ -0,0 +1,208 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ *
+ * 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 <assert.h>
+#include <console/console.h>
+#include <cpu/x86/msr.h>
+#include <fsp/util.h>
+#include <soc/gpio_soc_defs.h>
+#include <soc/iomap.h>
+#include <soc/msr.h>
+#include <soc/pci_devs.h>
+#include <soc/romstage.h>
+#include <soc/soc_chip.h>
+#include <string.h>
+
+static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
+		const struct soc_intel_tigerlake_config *config)
+{
+	unsigned int i;
+	uint32_t mask = 0;
+	const struct device *dev;
+
+	/* Set IGD stolen size to 60MB. */
+	m_cfg->IgdDvmt50PreAlloc = 0xFE;
+	m_cfg->TsegSize = CONFIG_SMM_TSEG_SIZE;
+	m_cfg->IedSize = CONFIG_IED_REGION_SIZE;
+	m_cfg->SaGv = config->SaGv;
+	m_cfg->UserBd = BOARD_TYPE_ULT_ULX;
+	m_cfg->RMT = config->RMT;
+
+	/* CpuRatio Settings */
+	if (config->cpu_ratio_override) {
+		m_cfg->CpuRatio = config->cpu_ratio_override;
+	} else {
+		/* Set CpuRatio to match existing MSR value */
+		msr_t flex_ratio;
+		flex_ratio = rdmsr(MSR_FLEX_RATIO);
+		m_cfg->CpuRatio = (flex_ratio.lo >> 8) & 0xff;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(config->PcieRpEnable); i++) {
+		if (config->PcieRpEnable[i])
+			mask |= (1 << i);
+	}
+	m_cfg->PcieRpEnableMask = mask;
+
+	memcpy(m_cfg->PcieClkSrcUsage, config->PcieClkSrcUsage,
+		sizeof(config->PcieClkSrcUsage));
+
+	for (i = 0; i < CONFIG_MAX_PCIE_CLOCKS; i++) {
+		if (config->PcieClkSrcUsage[i] == 0)
+			m_cfg->PcieClkSrcUsage[i] = 0xff;
+	}
+
+	memcpy(m_cfg->PcieClkSrcClkReq, config->PcieClkSrcClkReq,
+		sizeof(config->PcieClkSrcClkReq));
+
+	m_cfg->PrmrrSize = config->PrmrrSize;
+	m_cfg->EnableC6Dram = config->enable_c6dram;
+	/* Disable BIOS Guard */
+	m_cfg->BiosGuard = 0;
+
+	/* UART Debug Log */
+	m_cfg->PcdDebugInterfaceFlags = CONFIG(DRIVERS_UART_8250IO) ?
+			DEBUG_INTERFACE_UART|DEBUG_INTERFACE_TRACEHUB :
+			DEBUG_INTERFACE_SERIAL_IO|DEBUG_INTERFACE_TRACEHUB;
+	m_cfg->PcdIsaSerialUartBase = 0x0;
+	m_cfg->SerialIoUartDebugControllerNumber = CONFIG_UART_FOR_CONSOLE;
+
+	/*
+	 * Skip IGD initialization in FSP if device
+	 * is disable in devicetree.cb.
+	 */
+	dev = pcidev_path_on_root(SA_DEVFN_IGD);
+	if (!dev || !dev->enabled)
+		m_cfg->InternalGfx = 0;
+	else
+		m_cfg->InternalGfx = 0x1;
+
+	/* ISH */
+	dev = pcidev_path_on_root(PCH_DEVFN_ISH);
+	if (!dev || !dev->enabled)
+		m_cfg->PchIshEnable = 0;
+	else
+		m_cfg->PchIshEnable = 1;
+
+	/* DP port config */
+	m_cfg->DdiPortAConfig = config->DdiPortAConfig;
+	m_cfg->DdiPortBConfig = config->DdiPortBConfig;
+	m_cfg->DdiPortAHpd = config->DdiPortAHpd;
+	m_cfg->DdiPortBHpd = config->DdiPortBHpd;
+	m_cfg->DdiPortCHpd = config->DdiPortCHpd;
+	m_cfg->DdiPort1Hpd = config->DdiPort1Hpd;
+	m_cfg->DdiPort2Hpd = config->DdiPort2Hpd;
+	m_cfg->DdiPort3Hpd = config->DdiPort3Hpd;
+	m_cfg->DdiPort4Hpd = config->DdiPort4Hpd;
+	m_cfg->DdiPortADdc = config->DdiPortADdc;
+	m_cfg->DdiPortBDdc = config->DdiPortBDdc;
+	m_cfg->DdiPortCDdc = config->DdiPortCDdc;
+	m_cfg->DdiPort1Ddc = config->DdiPort1Ddc;
+	m_cfg->DdiPort2Ddc = config->DdiPort2Ddc;
+	m_cfg->DdiPort3Ddc = config->DdiPort3Ddc;
+	m_cfg->DdiPort4Ddc = config->DdiPort4Ddc;
+
+	/* Image clock: disable all clocks for bypassing FSP pin mux */
+	memset(m_cfg->ImguClkOutEn, 0, sizeof(m_cfg->ImguClkOutEn));
+
+	/* Tcss */
+	m_cfg->TcssXhciEn = config->TcssXhciEn;
+	m_cfg->TcssXdciEn = config->TcssXdciEn;
+
+	/* USB4/TBT */
+	dev = pcidev_path_on_root(SA_DEVFN_TBT0);
+	if (dev)
+		m_cfg->TcssItbtPcie0En = dev->enabled;
+	else
+		m_cfg->TcssItbtPcie0En = 0;
+	dev = pcidev_path_on_root(SA_DEVFN_TBT1);
+	if (dev)
+		m_cfg->TcssItbtPcie1En = dev->enabled;
+	else
+		m_cfg->TcssItbtPcie1En = 0;
+
+	dev = pcidev_path_on_root(SA_DEVFN_TBT2);
+	if (dev)
+		m_cfg->TcssItbtPcie2En = dev->enabled;
+	else
+		m_cfg->TcssItbtPcie2En = 0;
+	dev = pcidev_path_on_root(SA_DEVFN_TBT3);
+	if (dev)
+		m_cfg->TcssItbtPcie3En = dev->enabled;
+	else
+		m_cfg->TcssItbtPcie3En = 0;
+
+	/* Enable Hyper Threading */
+	m_cfg->HyperThreading = 1;
+	/* Disable Lock PCU Thermal Management registers */
+	m_cfg->LockPTMregs = 0;
+	/* Channel Hash Mask:0x0001=BIT6 set(Minimal), 0x3FFF=BIT[19:6] set(Maximum) */
+	m_cfg->ChHashMask = 0x30CC;
+	/* Enable SMBus controller based on config */
+	m_cfg->SmbusEnable = config->SmbusEnable;
+	/* Set debug probe type */
+	m_cfg->PlatformDebugConsent = CONFIG_SOC_INTEL_TIGERLAKE_COPY_DEBUG_CONSENT;
+
+	/* Audio: HDAUDIO_LINK_MODE I2S/SNDW */
+	dev = pcidev_path_on_root(PCH_DEVFN_HDA);
+	if (!dev)
+		m_cfg->PchHdaEnable = 0;
+	else
+		m_cfg->PchHdaEnable = dev->enabled;
+
+	m_cfg->PchHdaDspEnable = config->PchHdaDspEnable;
+	m_cfg->PchHdaAudioLinkHdaEnable = config->PchHdaAudioLinkHdaEnable;
+	memcpy(m_cfg->PchHdaAudioLinkDmicEnable, config->PchHdaAudioLinkDmicEnable,
+			sizeof(m_cfg->PchHdaAudioLinkDmicEnable));
+	memcpy(m_cfg->PchHdaAudioLinkSspEnable, config->PchHdaAudioLinkSspEnable,
+			sizeof(m_cfg->PchHdaAudioLinkSspEnable));
+	memcpy(m_cfg->PchHdaAudioLinkSndwEnable, config->PchHdaAudioLinkSndwEnable,
+			sizeof(m_cfg->PchHdaAudioLinkSndwEnable));
+	m_cfg->PchHdaIDispLinkTmode = config->PchHdaIDispLinkTmode;
+	m_cfg->PchHdaIDispLinkFrequency = config->PchHdaIDispLinkFrequency;
+	m_cfg->PchHdaIDispCodecDisconnect = config->PchHdaIDispCodecDisconnect;
+
+	/* Vt-D config */
+	m_cfg->VtdDisable = 0;
+	m_cfg->VtdIgdEnable = 0x1;
+	m_cfg->VtdBaseAddress[0] = GFXVT_BASE_ADDRESS;
+	m_cfg->VtdIpuEnable = 0x1;
+	m_cfg->VtdBaseAddress[1] = IPUVT_BASE_ADDRESS;
+	m_cfg->VtdIopEnable = 0x1;
+	m_cfg->VtdBaseAddress[2] = VTVC0_BASE_ADDRESS;
+	m_cfg->VtdItbtEnable = 0x1;
+	m_cfg->VtdBaseAddress[3] = TBT0_BASE_ADDRESS;
+	m_cfg->VtdBaseAddress[4] = TBT1_BASE_ADDRESS;
+	m_cfg->VtdBaseAddress[5] = TBT2_BASE_ADDRESS;
+	m_cfg->VtdBaseAddress[6] = TBT3_BASE_ADDRESS;
+
+	/* Change VmxEnable UPD value according to ENABLE_VMX Kconfig */
+	m_cfg->VmxEnable = CONFIG(ENABLE_VMX);
+}
+
+void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version)
+{
+	const struct soc_intel_tigerlake_config *config;
+	FSP_M_CONFIG *m_cfg = &mupd->FspmConfig;
+
+	config = config_of_soc();
+
+	soc_memory_init_params(m_cfg, config);
+	mainboard_memory_init_params(mupd);
+}
+
+__weak void mainboard_memory_init_params(FSPM_UPD *mupd)
+{
+	printk(BIOS_DEBUG, "WEAK: %s/%s called\n", __FILE__, __func__);
+}
diff --git a/src/soc/intel/jasperlake/romstage/pch.c b/src/soc/intel/jasperlake/romstage/pch.c
new file mode 100644
index 0000000000..a005ea0b99
--- /dev/null
+++ b/src/soc/intel/jasperlake/romstage/pch.c
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ *
+ * 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 <intelblocks/smbus.h>
+#include <intelblocks/tco.h>
+#include <soc/romstage.h>
+
+void pch_init(void)
+{
+	/* Programming TCO_BASE_ADDRESS and TCO Timer Halt */
+	tco_configure();
+
+	/* Program SMBUS_BASE_ADDRESS and Enable it */
+	smbus_common_init();
+}
diff --git a/src/soc/intel/jasperlake/romstage/romstage.c b/src/soc/intel/jasperlake/romstage/romstage.c
new file mode 100644
index 0000000000..f78ea29ae1
--- /dev/null
+++ b/src/soc/intel/jasperlake/romstage/romstage.c
@@ -0,0 +1,134 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ *
+ * 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 <arch/romstage.h>
+#include <cbmem.h>
+#include <console/console.h>
+#include <fsp/util.h>
+#include <intelblocks/cfg.h>
+#include <intelblocks/cse.h>
+#include <intelblocks/pmclib.h>
+#include <memory_info.h>
+#include <soc/intel/common/smbios.h>
+#include <soc/iomap.h>
+#include <soc/pm.h>
+#include <soc/romstage.h>
+#include <soc/soc_chip.h>
+#include <string.h>
+
+#define FSP_SMBIOS_MEMORY_INFO_GUID	\
+{	\
+	0xd4, 0x71, 0x20, 0x9b, 0x54, 0xb0, 0x0c, 0x4e,	\
+	0x8d, 0x09, 0x11, 0xcf, 0x8b, 0x9f, 0x03, 0x23	\
+}
+
+/* Save the DIMM information for SMBIOS table 17 */
+static void save_dimm_info(void)
+{
+	int node, channel, dimm, dimm_max, index;
+	size_t hob_size;
+	const CONTROLLER_INFO *ctrlr_info;
+	const CHANNEL_INFO *channel_info;
+	const DIMM_INFO *src_dimm;
+	struct dimm_info *dest_dimm;
+	struct memory_info *mem_info;
+	const MEMORY_INFO_DATA_HOB *meminfo_hob;
+	const uint8_t smbios_memory_info_guid[16] =
+			FSP_SMBIOS_MEMORY_INFO_GUID;
+	const uint8_t *serial_num;
+
+	/* Locate the memory info HOB, presence validated by raminit */
+	meminfo_hob = fsp_find_extension_hob_by_guid(
+						smbios_memory_info_guid,
+						&hob_size);
+	if (meminfo_hob == NULL || hob_size == 0) {
+		printk(BIOS_ERR, "SMBIOS MEMORY_INFO_DATA_HOB not found\n");
+		return;
+	}
+
+	/*
+	 * Allocate CBMEM area for DIMM information used to populate SMBIOS
+	 * table 17
+	 */
+	mem_info = cbmem_add(CBMEM_ID_MEMINFO, sizeof(*mem_info));
+	if (mem_info == NULL) {
+		printk(BIOS_ERR, "CBMEM entry for DIMM info missing\n");
+		return;
+	}
+	memset(mem_info, 0, sizeof(*mem_info));
+
+	/* Save available DIMM information */
+	index = 0;
+	dimm_max = ARRAY_SIZE(mem_info->dimm);
+	for (node = 0; node < MAX_NODE; node++) {
+		ctrlr_info = &meminfo_hob->Controller[node];
+		for (channel = 0; channel < MAX_CH && index < dimm_max;
+			channel++) {
+			channel_info = &ctrlr_info->ChannelInfo[channel];
+			if (channel_info->Status != CHANNEL_PRESENT)
+				continue;
+
+			for (dimm = 0; dimm < MAX_DIMM && index < dimm_max;
+				dimm++) {
+				src_dimm = &channel_info->DimmInfo[dimm];
+				dest_dimm = &mem_info->dimm[index];
+				if (src_dimm->Status != DIMM_PRESENT)
+					continue;
+
+				u8 memProfNum = meminfo_hob->MemoryProfile;
+				serial_num = src_dimm->SpdSave +
+						SPD_SAVE_OFFSET_SERIAL;
+
+				/* Populate the DIMM information */
+				dimm_info_fill(dest_dimm,
+					src_dimm->DimmCapacity,
+					meminfo_hob->MemoryType,
+					meminfo_hob->ConfiguredMemoryClockSpeed,
+					src_dimm->RankInDimm,
+					channel_info->ChannelId,
+					src_dimm->DimmId,
+					(const char *)src_dimm->ModulePartNum,
+					sizeof(src_dimm->ModulePartNum),
+					serial_num,
+					meminfo_hob->DataWidth,
+					meminfo_hob->VddVoltage[memProfNum],
+					meminfo_hob->EccSupport,
+					src_dimm->MfgId,
+					src_dimm->SpdModuleType);
+				index++;
+			}
+		}
+	}
+	mem_info->dimm_cnt = index;
+	printk(BIOS_DEBUG, "%d DIMMs found\n", mem_info->dimm_cnt);
+}
+
+void mainboard_romstage_entry(void)
+{
+	bool s3wake;
+	struct chipset_power_state *ps = pmc_get_power_state();
+
+	/* Program MCHBAR, DMIBAR, GDXBAR and EDRAMBAR */
+	systemagent_early_init();
+	/* Program PCH init */
+	pch_init();
+	/* initialize Heci interface */
+	heci_init(HECI1_BASE_ADDRESS);
+
+	s3wake = pmc_fill_power_state(ps) == ACPI_S3;
+	fsp_memory_init(s3wake);
+	pmc_set_disb();
+	if (!s3wake)
+		save_dimm_info();
+}
diff --git a/src/soc/intel/jasperlake/romstage/systemagent.c b/src/soc/intel/jasperlake/romstage/systemagent.c
new file mode 100644
index 0000000000..9fa498e802
--- /dev/null
+++ b/src/soc/intel/jasperlake/romstage/systemagent.c
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ *
+ * 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.
+ */
+
+/*
+ * This file is created based on Intel Tiger Lake Processor SA Datasheet
+ * Document number: 571131
+ * Chapter number: 3
+ */
+
+#include <intelblocks/systemagent.h>
+#include <soc/iomap.h>
+#include <soc/romstage.h>
+#include <soc/systemagent.h>
+
+void systemagent_early_init(void)
+{
+	static const struct sa_mmio_descriptor soc_fixed_pci_resources[] = {
+		{ MCHBAR, MCH_BASE_ADDRESS, MCH_BASE_SIZE, "MCHBAR" },
+		{ DMIBAR, DMI_BASE_ADDRESS, DMI_BASE_SIZE, "DMIBAR" },
+		{ EPBAR, EP_BASE_ADDRESS, EP_BASE_SIZE, "EPBAR" },
+	};
+
+	static const struct sa_mmio_descriptor soc_fixed_mch_resources[] = {
+		{ REGBAR, REG_BASE_ADDRESS, REG_BASE_SIZE, "REGBAR" },
+		{ EDRAMBAR, EDRAM_BASE_ADDRESS, EDRAM_BASE_SIZE, "EDRAMBAR" },
+	};
+
+	/* Set Fixed MMIO address into PCI configuration space */
+	sa_set_pci_bar(soc_fixed_pci_resources,
+		       ARRAY_SIZE(soc_fixed_pci_resources));
+	/* Set Fixed MMIO address into MCH base address */
+	sa_set_mch_bar(soc_fixed_mch_resources,
+		       ARRAY_SIZE(soc_fixed_mch_resources));
+	/* Enable PAM registers */
+	enable_pam_region();
+}