mb/amd/mandolin: Add Picasso CRB

Mandolin is the CRB for AMD Picasso and Dali.

The mainboard code still needs a little cleanup and verification, but
I'll do that in a follow-up to have a non Chromebook board using the
Picasso SoC code in tree as soon as possible to be able to detect some
possible breakage.

BUG=b:130660285

Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I2b4a78e1eef9f998e1986da1506201eb505822eb
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33772
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

17 files changed, 988 insertions, 0 deletions

diff --git a/src/mainboard/amd/mandolin/Kconfig b/src/mainboard/amd/mandolin/Kconfig
new file mode 100644
index 0000000000..9760e45194
--- /dev/null
+++ b/src/mainboard/amd/mandolin/Kconfig
@@ -0,0 +1,94 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+if BOARD_AMD_MANDOLIN
+
+config BOARD_SPECIFIC_OPTIONS
+	def_bool y
+	select SOC_AMD_COMMON_BLOCK_USE_ESPI
+	select SOC_AMD_PICASSO
+	select HAVE_ACPI_TABLES
+	select BOARD_ROMSIZE_KB_8192
+	select AZALIA_PLUGIN_SUPPORT
+	select HAVE_ACPI_RESUME
+
+config FMDFILE
+	string
+	default "src/mainboard/amd/mandolin/mandolin.fmd"
+
+config AMD_LPC_DEBUG_CARD
+	bool "Enable LPC-Serial debug card on the debug header"
+	default n
+	select PICASSO_LPC_IOMUX
+	select SUPERIO_SMSC_SIO1036
+	help
+	  AMD's debug card contains an SMSC SIO1036 device which provides
+	  an I/O-based UART in the system.  This feature is not compatible with
+	  CONFIG_HUDSON_UART enabling the memory-mapped UART in the chipset.
+	  Note that Kconfig does not currently enforce this restriction.
+
+config CBFS_SIZE
+	default 0x780000
+	help
+	  TODO: Adjust this to maximize CBFS size
+
+config MAINBOARD_DIR
+	string
+	default amd/mandolin
+
+config MAINBOARD_PART_NUMBER
+	string
+	default "MANDOLIN"
+
+config MAX_CPUS
+	int
+	default 8
+
+config IRQ_SLOT_COUNT
+	int
+	default 11
+
+config ONBOARD_VGA_IS_PRIMARY
+	bool
+	default y
+
+config AMD_FWM_POSITION_INDEX
+	int
+	default 3
+	help
+	  TODO: might need to be adapted for better placement of files in cbfs
+
+config MANDOLIN_HAVE_MCHP_FW
+	bool "Have Microchip EC firmware?"
+	default n
+
+config MANDOLIN_MCHP_FW_FILE
+	string
+	depends on MANDOLIN_HAVE_MCHP_FW
+	default "3rdparty/blobs/mainboard/amd/mandolin/mchp.bin"
+
+if !AMD_LPC_DEBUG_CARD
+choice MANDOLIN_LPC_IOMUX
+	prompt "State of IOMux for LPC/eMMC signals"
+	default MANDOLIN_IOMUX_USE_EMMC
+	help
+	  Mandolin is designed to use either LPC or eMMC signals.  Use this
+	  selection to determine which are configured for this image.
+
+config MANDOLIN_IOMUX_USE_LPC
+	bool "LPC signals"
+	help
+
+config MANDOLIN_IOMUX_USE_EMMC
+	bool "eMMC signals"
+
+endchoice
+endif # !AMD_LPC_DEBUG_CARD
+
+config PICASSO_LPC_IOMUX
+	bool
+	default y if MANDOLIN_IOMUX_USE_LPC
+	help
+	  Picasso's LPC bus signals are MUXed with some of the EMMC signals.
+	  Select this option if LPC signals are required.
+
+endif # BOARD_AMD_MANDOLIN
diff --git a/src/mainboard/amd/mandolin/Kconfig.name b/src/mainboard/amd/mandolin/Kconfig.name
new file mode 100644
index 0000000000..7dbfc3fd71
--- /dev/null
+++ b/src/mainboard/amd/mandolin/Kconfig.name
@@ -0,0 +1,2 @@
+config BOARD_AMD_MANDOLIN
+	bool "Mandolin"
diff --git a/src/mainboard/amd/mandolin/Makefile.inc b/src/mainboard/amd/mandolin/Makefile.inc
new file mode 100644
index 0000000000..52ad9c695b
--- /dev/null
+++ b/src/mainboard/amd/mandolin/Makefile.inc
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+bootblock-y += bootblock.c
+bootblock-y += early_gpio.c
+
+ramstage-y += gpio.c
+
+# APCB_mandolin.bin
+APCB_SOURCES = mandolin
+
+PHONY+=add_mchp_fw
+INTERMEDIATE+=add_mchp_fw
+
+ifeq ($(CONFIG_MANDOLIN_HAVE_MCHP_FW),y)
+
+MANDOLIN_MICROCHIP_FW_OFFSET=0
+add_mchp_fw: $(obj)/coreboot.pre
+	$(CBFSTOOL) $(obj)/coreboot.pre write -r EC -f $(CONFIG_MANDOLIN_MCHP_FW_FILE) --fill-upward
+
+else
+files_added:: warn_no_mchp
+endif # CONFIG_MANDOLIN_HAVE_MCHP_FW
+
+PHONY+=warn_no_mchp
+warn_no_mchp:
+	printf "\n\t** WARNING **\n"
+	printf "coreboot has been built without an the Microchip EC.\n"
+	printf "Do not flash this image.  Your Mandolin's power button\n"
+	printf "will not respond when you press it.\n\n"
+
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/acpi
diff --git a/src/mainboard/amd/mandolin/acpi/gpe.asl b/src/mainboard/amd/mandolin/acpi/gpe.asl
new file mode 100644
index 0000000000..e28edf84ba
--- /dev/null
+++ b/src/mainboard/amd/mandolin/acpi/gpe.asl
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+//
+//
+//
+// todo: check file for accuracy
+//
+//
+//
+
+External (\_SB.PCI0.PBR4, DeviceObj)
+External (\_SB.PCI0.PBR5, DeviceObj)
+External (\_SB.PCI0.PBR6, DeviceObj)
+External (\_SB.PCI0.PBR7, DeviceObj)
+External (\_SB.PCI0.AZHD, DeviceObj)
+
+Scope(\_GPE) {	/* Start Scope GPE */
+
+	/*  General event 3  */
+	Method(_L03) {
+		/* DBGO("\\_GPE\\_L00\n") */
+	}
+
+	/*  Legacy PM event  */
+	Method(_L08) {
+		/* DBGO("\\_GPE\\_L08\n") */
+	}
+
+	/*  Temp warning (TWarn) event  */
+	Method(_L09) {
+		/* DBGO("\\_GPE\\_L09\n") */
+		/* Notify (\_TZ.TZ00, 0x80) */
+	}
+
+	/*  USB controller PME#  */
+	Method(_L0B) {
+		/* DBGO("\\_GPE\\_L0B\n") */
+		Notify(\_SB.PCI0.EHC0, 0x02) /* NOTIFY_DEVICE_WAKE */
+		Notify(\_SB.PCI0.XHC0, 0x02) /* NOTIFY_DEVICE_WAKE */
+	}
+
+	/*  ExtEvent0 SCI event  */
+	Method(_L10) {
+		/* DBGO("\\_GPE\\_L10\n") */
+	}
+
+	/*  ExtEvent1 SCI event  */
+	Method(_L11) {
+		/* DBGO("\\_GPE\\_L11\n") */
+	}
+
+	/*  GPIO0 or GEvent8 event  */
+	Method(_L18) {
+		/* DBGO("\\_GPE\\_L18\n") */
+		Notify(\_SB.PCI0.PBR4, 0x02) /* NOTIFY_DEVICE_WAKE */
+		Notify(\_SB.PCI0.PBR5, 0x02) /* NOTIFY_DEVICE_WAKE */
+		Notify(\_SB.PCI0.PBR6, 0x02) /* NOTIFY_DEVICE_WAKE */
+		Notify(\_SB.PCI0.PBR7, 0x02) /* NOTIFY_DEVICE_WAKE */
+	}
+
+	/*  Azalia SCI event  */
+	Method(_L1B) {
+		/* DBGO("\\_GPE\\_L1B\n") */
+		Notify(\_SB.PCI0.AZHD, 0x02) /* NOTIFY_DEVICE_WAKE */
+	}
+}	/* End Scope GPE */
diff --git a/src/mainboard/amd/mandolin/acpi/mainboard.asl b/src/mainboard/amd/mandolin/acpi/mainboard.asl
new file mode 100644
index 0000000000..d59240bc16
--- /dev/null
+++ b/src/mainboard/amd/mandolin/acpi/mainboard.asl
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* Memory related values */
+Name(LOMH, 0x0)	/* Start of unused memory in C0000-E0000 range */
+Name(PBAD, 0x0)	/* Address of BIOS area (If TOM2 != 0, Addr >> 16) */
+Name(PBLN, 0x0)	/* Length of BIOS area */
+
+Name(PCBA, CONFIG_MMCONF_BASE_ADDRESS)	/* Base address of PCIe config space */
+Name(PCLN, Multiply(0x100000, CONFIG_MMCONF_BUS_NUMBER)) /* Length of PCIe config space, 1MB each bus */
+Name(HPBA, 0xFED00000)	/* Base address of HPET table */
+
+/* Some global data */
+Name(OSVR, 3)	/* Assume nothing. WinXp = 1, Vista = 2, Linux = 3, WinCE = 4 */
+Name(OSV, Ones)	/* Assume nothing */
+Name(PMOD, One)	/* Assume APIC */
diff --git a/src/mainboard/amd/mandolin/acpi/sleep.asl b/src/mainboard/amd/mandolin/acpi/sleep.asl
new file mode 100644
index 0000000000..0b65ab19ef
--- /dev/null
+++ b/src/mainboard/amd/mandolin/acpi/sleep.asl
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* Wake status package */
+Name(WKST,Package(){Zero, Zero})
+
+/*
+* \_PTS - Prepare to Sleep method
+*
+*	Entry:
+*		Arg0=The value of the sleeping state S1=1, S2=2, etc
+*
+* Exit:
+*		-none-
+*
+* The _PTS control method is executed at the beginning of the sleep process
+* for S1-S5. The sleeping value is passed to the _PTS control method.  This
+* control method may be executed a relatively long time before entering the
+* sleep state and the OS may abort the operation without notification to
+* the ACPI driver.  This method cannot modify the configuration or power
+* state of any device in the system.
+*/
+Method(_PTS, 1) {
+	/* DBGO("\\_PTS\n") */
+	/* DBGO("From S0 to S") */
+	/* DBGO(Arg0) */
+	/* DBGO("\n") */
+
+	/* Clear wake status structure. */
+	Store(0, PEWD)
+	Store(0, Index(WKST,0))
+	Store(0, Index(WKST,1))
+	Store(7, UPWS)
+} /* End Method(\_PTS) */
+
+/*
+*	\_BFS OEM Back From Sleep method
+*
+*	Entry:
+*		Arg0=The value of the sleeping state S1=1, S2=2
+*
+*	Exit:
+*		-none-
+*/
+Method(\_BFS, 1) {
+	/* DBGO("\\_BFS\n") */
+	/* DBGO("From S") */
+	/* DBGO(Arg0) */
+	/* DBGO(" to S0\n") */
+}
+
+/*
+*  \_WAK System Wake method
+*
+*	Entry:
+*		Arg0=The value of the sleeping state S1=1, S2=2
+*
+*	Exit:
+*		Return package of 2 DWords
+*		Dword 1 - Status
+*			0x00000000	wake succeeded
+*			0x00000001	Wake was signaled but failed due to lack of power
+*			0x00000002	Wake was signaled but failed due to thermal condition
+*		Dword 2 - Power Supply state
+*			if non-zero the effective S-state the power supply entered
+*/
+Method(\_WAK, 1) {
+	/* DBGO("\\_WAK\n") */
+	/* DBGO("From S") */
+	/* DBGO(Arg0) */
+	/* DBGO(" to S0\n") */
+
+	Return(WKST)
+} /* End Method(\_WAK) */
diff --git a/src/mainboard/amd/mandolin/board_info.txt b/src/mainboard/amd/mandolin/board_info.txt
new file mode 100644
index 0000000000..b351b8e696
--- /dev/null
+++ b/src/mainboard/amd/mandolin/board_info.txt
@@ -0,0 +1 @@
+Category: eval
diff --git a/src/mainboard/amd/mandolin/bootblock.c b/src/mainboard/amd/mandolin/bootblock.c
new file mode 100644
index 0000000000..06da379d93
--- /dev/null
+++ b/src/mainboard/amd/mandolin/bootblock.c
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include <amdblocks/lpc.h>
+#include <superio/smsc/sio1036/sio1036.h>
+#include "gpio.h"
+
+#define SERIAL_DEV PNP_DEV(0x4e, SIO1036_SP1)
+
+void bootblock_mainboard_early_init(void)
+{
+	mainboard_program_early_gpios();
+
+	if (CONFIG(SUPERIO_SMSC_SIO1036)) {
+		lpc_enable_sio_decode(LPC_SELECT_SIO_4E4F);
+		lpc_enable_decode(DECODE_ENABLE_SERIAL_PORT0 << CONFIG_UART_FOR_CONSOLE);
+		sio1036_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
+	}
+}
diff --git a/src/mainboard/amd/mandolin/devicetree.cb b/src/mainboard/amd/mandolin/devicetree.cb
new file mode 100644
index 0000000000..179582b673
--- /dev/null
+++ b/src/mainboard/amd/mandolin/devicetree.cb
@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+chip soc/amd/picasso
+	register "acp_pin_cfg" = "I2S_PINS_MAX_HDA"
+
+	# Set FADT Configuration
+	register "fadt_pm_profile" = "PM_UNSPECIFIED"
+	register "fadt_boot_arch" = "ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042"
+	register "fadt_flags" = "ACPI_FADT_WBINVD | /* See table 5-10 ACPI 3.0a spec */
+				ACPI_FADT_C1_SUPPORTED |
+				ACPI_FADT_SLEEP_BUTTON |
+				ACPI_FADT_S4_RTC_WAKE |
+				ACPI_FADT_32BIT_TIMER |
+				ACPI_FADT_RESET_REGISTER |
+				ACPI_FADT_PCI_EXPRESS_WAKE |
+				ACPI_FADT_PLATFORM_CLOCK |
+				ACPI_FADT_S4_RTC_VALID |
+				ACPI_FADT_REMOTE_POWER_ON"
+
+	register "sd_emmc_config" = "SD_EMMC_DISABLE"
+
+	# eSPI Configuration
+	register "common_config.espi_config" = "{
+		.std_io_decode_bitmap = ESPI_DECODE_IO_0X60_0X64_EN,
+		.generic_io_range[0] = {
+			.base = 0x662,
+			.size = 8,
+		},
+
+		.io_mode = ESPI_IO_MODE_SINGLE,
+		.op_freq_mhz = ESPI_OP_FREQ_33_MHZ,
+		.crc_check_enable = 1,
+		.dedicated_alert_pin = 1,
+		.periph_ch_en = 0,
+		.vw_ch_en = 0,
+		.oob_ch_en = 0,
+		.flash_ch_en = 0,
+	}"
+
+	device cpu_cluster 0 on
+		device lapic 0 on end
+	end
+	device domain 0 on
+		subsystemid 0x1022 0x1510 inherit
+		device pci 0.0 on  end # Root Complex
+		device pci 0.2 on  end # IOMMU
+		device pci 1.0 on  end # Dummy Host Bridge
+		device pci 1.3 on  end # Bridge
+		device pci 8.0 on  end # Dummy Host Bridge
+		device pci 8.1 on      # Bridge to Bus A
+			device pci 0.0 on  end # Internal GPU
+			device pci 0.1 on  end # Display HDA
+			device pci 0.2 on  end # Crypto Coprocesor
+			device pci 0.3 on  end # USB 3.1
+			device pci 0.4 on  end # USB 3.1
+			device pci 0.5 on  end # Audio
+			device pci 0.6 on  end # HDA
+			device pci 0.7 on  end # non-Sensor Fusion Hub device
+		end
+		device pci 8.2 on      # Bridge to Bus B
+			device pci 0.0 on  end # AHCI
+			device pci 0.1 on  end # Ethernet
+			device pci 0.2 on  end # Ethernet
+		end
+		device pci 14.0 on     # SM
+			chip drivers/generic/generic # dimm 0-0-0
+				device i2c 50 on end
+				device i2c 51 on end
+			end
+		end # SM
+		device pci 14.3 on  # - D14F3 bridge
+			chip superio/smsc/sio1036 # optional debug card
+			end
+		end
+		device pci 14.6 off end # SDHCI
+		device pci 18.0 on  end # Data fabric [0-7]
+		device pci 18.1 on  end
+		device pci 18.2 on  end
+		device pci 18.3 on  end
+		device pci 18.4 on  end
+		device pci 18.5 on  end
+		device pci 18.6 on  end
+		device pci 18.7 on  end
+	end # domain
+end	# chip soc/amd/picasso
diff --git a/src/mainboard/amd/mandolin/dsdt.asl b/src/mainboard/amd/mandolin/dsdt.asl
new file mode 100644
index 0000000000..02a661918f
--- /dev/null
+++ b/src/mainboard/amd/mandolin/dsdt.asl
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#define MAINBOARD_HAS_SPEAKER 1
+
+/* DefinitionBlock Statement */
+#include <acpi/acpi.h>
+DefinitionBlock (
+	"DSDT.AML",	/* Output filename */
+	"DSDT",		/* Signature */
+	0x02,		/* DSDT Revision, needs to be 2 for 64bit */
+	OEM_ID,
+	ACPI_TABLE_CREATOR,
+	0x00010001	/* OEM Revision */
+	)
+{	/* Start of ASL file */
+	/* #include <arch/x86/acpi/debug.asl> */	/* as needed */
+
+	/* global NVS and variables */
+	#include <globalnvs.asl>
+
+	/* Globals for the platform */
+	#include "acpi/mainboard.asl"
+
+	/* PCI IRQ mapping for the Southbridge */
+	#include <pcie.asl>
+
+	/* Describe the processor tree (\_PR) */
+	#include <cpu.asl>
+
+	/* Contains the supported sleep states for this chipset */
+	#include <sleepstates.asl>
+
+	/* Contains the Sleep methods (WAK, PTS, GTS, etc.) */
+	#include "acpi/sleep.asl"
+
+	/* Contains _SWS methods */
+	#include <soc/amd/common/acpi/acpi_wake_source.asl>
+
+	/* System Bus */
+	Scope(\_SB) { /* Start \_SB scope */
+		/* global utility methods expected within the \_SB scope */
+		#include <arch/x86/acpi/globutil.asl>
+
+		/* Describe the SOC */
+		#include <soc.asl>
+
+	} /* End \_SB scope */
+
+	/* Define the General Purpose Events for the platform */
+	#include "acpi/gpe.asl"
+}
+/* End of ASL file */
diff --git a/src/mainboard/amd/mandolin/early_gpio.c b/src/mainboard/amd/mandolin/early_gpio.c
new file mode 100644
index 0000000000..b6dd0d6990
--- /dev/null
+++ b/src/mainboard/amd/mandolin/early_gpio.c
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <soc/gpio.h>
+#include "gpio.h"
+
+/* GPIO pins used by coreboot should be initialized in bootblock */
+
+static const struct soc_amd_gpio gpio_set_stage_reset[] = {
+	/* not LLB */
+	PAD_GPI(GPIO_12, PULL_UP),
+	/* not USB_OC5_L */
+	PAD_GPI(GPIO_13, PULL_UP),
+	/* not USB_OC4_L */
+	PAD_GPI(GPIO_14, PULL_UP),
+	/* not USB_OC1_L */
+	PAD_GPI(GPIO_17, PULL_UP),
+	/* not USB_OC2_L */
+	PAD_GPI(GPIO_18, PULL_UP),
+	/* SDIO eMMC power control */
+	PAD_NF(GPIO_22, EMMC_PRW_CTRL, PULL_NONE),
+	/* PCIe SSD power enable */
+	PAD_GPO(GPIO_23, HIGH),
+	/* PCIe Reset to DP0, DP1, J2105, TP, FP */
+	PAD_NF(GPIO_27, PCIE_RST1_L, PULL_NONE),
+	/* eSPI CS# */
+	PAD_NF(GPIO_30, ESPI_CS_L, PULL_NONE),
+	/* FANOUT0 */
+	PAD_NF(GPIO_85, FANOUT0, PULL_NONE),
+	/* PC beep to codec */
+	PAD_NF(GPIO_91, SPKR, PULL_NONE),
+};
+
+void mainboard_program_early_gpios(void)
+{
+	program_gpios(gpio_set_stage_reset, ARRAY_SIZE(gpio_set_stage_reset));
+}
diff --git a/src/mainboard/amd/mandolin/gpio.c b/src/mainboard/amd/mandolin/gpio.c
new file mode 100644
index 0000000000..a60f00e03a
--- /dev/null
+++ b/src/mainboard/amd/mandolin/gpio.c
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <soc/gpio.h>
+
+#include "gpio.h"
+
+/*
+ * As a rule of thumb, GPIO pins used by coreboot should be initialized at
+ * bootblock while GPIO pins used only by the OS should be initialized at
+ * ramstage.
+ */
+static const struct soc_amd_gpio gpio_set_stage_ram[] = {
+	/* SSD DEVSLP */
+	PAD_NF(GPIO_5, DEVSLP0, PULL_NONE),
+	/* Defeature SATA Express DEVSLP, as some boards are reworked
+	 * to tie this to GPIO23 to control power */
+	PAD_GPI(GPIO_6, PULL_UP),
+	/* I2S SDIN */
+	PAD_NF(GPIO_7, ACP_I2S_SDIN, PULL_NONE),
+	/* I2S LRCLK */
+	PAD_NF(GPIO_8, ACP_I2S_LRCLK, PULL_NONE),
+	/* Blink */
+	PAD_NF(GPIO_11, BLINK, PULL_NONE),
+	/* APU_ALS_INT# */
+	PAD_SCI(GPIO_24, PULL_UP, EDGE_LOW),
+	/* Finger print CS# */
+	PAD_GPO(GPIO_31, HIGH),
+	/* NFC IRQ */
+	PAD_INT(GPIO_69, PULL_UP, EDGE_LOW, STATUS),
+	/* Rear camera power enable */
+	PAD_GPO(GPIO_89, HIGH),
+};
+
+/* eMMC controller driving either an SD card or eMMC device. */
+static const struct soc_amd_gpio emmc_gpios[] = {
+	PAD_NF(GPIO_21,  EMMC_CMD,	PULL_UP),
+	PAD_NF(GPIO_22,  EMMC_PRW_CTRL,	PULL_UP),
+	PAD_NF(GPIO_68,  EMMC_CD,	PULL_UP),
+	PAD_NF(GPIO_70,  EMMC_CLK,	PULL_NONE),
+	PAD_NF(GPIO_104, EMMC_DATA0,	PULL_UP),
+	PAD_NF(GPIO_105, EMMC_DATA1,	PULL_UP),
+	PAD_NF(GPIO_106, EMMC_DATA2,	PULL_UP),
+	PAD_NF(GPIO_107, EMMC_DATA3,	PULL_NONE),
+	PAD_NF(GPIO_74,  EMMC_DATA4,	PULL_UP),
+	PAD_NF(GPIO_75,  EMMC_DATA6,	PULL_UP),
+	PAD_NF(GPIO_87,  EMMC_DATA7,	PULL_UP),
+	PAD_NF(GPIO_88,  EMMC_DATA5,	PULL_UP),
+	PAD_NF(GPIO_109, EMMC_DS,	PULL_UP),
+};
+
+void mainboard_program_gpios(void)
+{
+	program_gpios(gpio_set_stage_ram, ARRAY_SIZE(gpio_set_stage_ram));
+
+	/* Re-muxing LPCCLK0 can hang the system if LPC is in use. */
+	if (CONFIG(AMD_LPC_DEBUG_CARD))
+		printk(BIOS_INFO, "eMMC not available due to LPC requirement\n");
+	else
+		program_gpios(emmc_gpios, ARRAY_SIZE(emmc_gpios));
+}
diff --git a/src/mainboard/amd/mandolin/gpio.h b/src/mainboard/amd/mandolin/gpio.h
new file mode 100644
index 0000000000..04c98c50df
--- /dev/null
+++ b/src/mainboard/amd/mandolin/gpio.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef MAINBOARD_GPIO_H
+#define MAINBOARD_GPIO_H
+
+void mainboard_program_early_gpios(void); /* bootblock GPIO configuration */
+void mainboard_program_gpios(void); /* ramstage GPIO configuration */
+
+#endif  /* MAINBOARD_GPIO_H */
diff --git a/src/mainboard/amd/mandolin/hda_verb.c b/src/mainboard/amd/mandolin/hda_verb.c
new file mode 100644
index 0000000000..61ae400540
--- /dev/null
+++ b/src/mainboard/amd/mandolin/hda_verb.c
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/azalia_device.h>
+
+const u32 cim_verb_data[] = {
+	/* Realtek ALC701 */
+	0x10ec0701,
+	0x00000000,
+	0x00000016,
+
+	AZALIA_SUBVENDOR(0, 0x1022D001), // HDA Codec Subsystem ID: 0x1022D001
+
+	0x0017ff00, 0x0017ff00, 0x0017ff00, 0x0017ff00, // Widget node 0x01 :
+	0x01271c40, 0x01271d01, 0x01271ea6, 0x01271fb7, // Pin widget 0x12 - DMIC
+	0x01371c00, 0x01371d00, 0x01371e00, 0x01371f40, // Pin widget 0x13 - DMIC
+	0x01471c10, 0x01471d01, 0x01471e17, 0x01471f90, // Pin widget 0x14 - FRONT (Port-D)
+	0x01571cf0, 0x01571d11, 0x01571e11, 0x01571f41, // Pin widget 0x15 - I2S-OUT
+	0x01671cf0, 0x01671d11, 0x01671e11, 0x01671f41, // Pin widget 0x16 - LINE3 (Port-B)
+	0x01771cf0, 0x01771d11, 0x01771e11, 0x01771f41, // Pin widget 0x17 - I2S-OUT
+	0x01871cf0, 0x01871d11, 0x01871e11, 0x01871f41, // Pin widget 0x18 - I2S-IN
+	0x01971cf0, 0x01971d11, 0x01971e11, 0x01971f41, // Pin widget 0x19 - MIC2 (Port-F)
+	0x01a71cf0, 0x01a71d11, 0x01a71e11, 0x01a71f41, // Pin widget 0x1A - LINE1 (Port-C)
+	0x01b71c50, 0x01b71d10, 0x01b71ea1, 0x01b71f04, // Pin widget 0x1B - LINE2 (Port-E)
+	0x01d71c01, 0x01d71d00, 0x01d71e60, 0x01d71f40, // Pin widget 0x1D - PC-BEEP
+	0x01e71c30, 0x01e71d11, 0x01e71e45, 0x01e71f04, // Pin widget 0x1E - S/PDIF-OUT
+	0x01f71cf0, 0x01f71d11, 0x01f71e11, 0x01f71f41, // Pin widget 0x1F - S/PDIF-IN
+	0x02171c20, 0x02171d10, 0x02171e21, 0x02171f04, // Pin widget 0x21 - HP-OUT (Port-I)
+	0x02971cf0, 0x02971d11, 0x02971e11, 0x02971f41, // Pin widget 0x29 - I2S-IN
+	0x02050038, 0x02047901, 0x0205006b, 0x02040260, // NID 0x20 -0 Set Class-D output
+							//  power as 2.2W@4 Ohm, and
+							//  MIC2-VREFO-R is controlled by
+							//  Line2 port.
+	0x0205001a, 0x02048c03, 0x02050045, 0x0204b289, // NID 0x20 - 1
+	0x0205004a, 0x0204201b, 0x0205004a, 0x0204201b, // NID 0x20 - 2
+	0x02050010, 0x02040420, 0x01470c00, 0x02050036, // Dos beep path - 1
+	0x02047151, 0x01470740, 0x0143b000, 0x01470c02, // Dos beep path - 2
+
+	/* Realtek ALC285 */
+	0x10ec0285,
+	0x00000000,
+	0x00000028,
+
+	AZALIA_SUBVENDOR(0, 0x1022D002),
+
+	0x0017ff00, 0x0017ff00, 0x0017ff00, 0x0017ff00, // Widget node 0x01 :
+	0x01271c40, 0x01271d01, 0x01271ea6, 0x01271fb7, // Pin widget 0x12 - DMIC
+	0x01371c00, 0x01371d00, 0x01371e00, 0x01371f40, // Pin widget 0x13 - DMIC
+	0x01471c10, 0x01471d01, 0x01471e17, 0x01471f90, // Pin widget 0x14 - Front (Port-D)
+	0x01671cf0, 0x01671d11, 0x01671e11, 0x01671f41, // Pin widget 0x16 - NPC
+	0x01771cf0, 0x01771d11, 0x01771e11, 0x01771f41, // Pin widget 0x17 - I2S OUT
+	0x01871cf0, 0x01871d11, 0x01871e11, 0x01871f41, // Pin widget 0x18 - I2S IN
+	0x01971cf0, 0x01971d11, 0x01971e11, 0x01971f41, // Pin widget 0x19 - MIC2 (Port-F)
+	0x01a71cf0, 0x01a71d11, 0x01a71e11, 0x01a71f41, // Pin widget 0x1A - NPC
+	0x01b71c30, 0x01b71d90, 0x01b71ea1, 0x01b71f04, // Pin widget 0x1B - LINE2 (Port-E)
+	0x01d71c2d, 0x01d71d19, 0x01d71e66, 0x01d71f40, // Pin widget 0x1D - BEEP-IN
+	0x01e71cf0, 0x01e71d11, 0x01e71e11, 0x01e71f41, // Pin widget 0x1E - S/PDIF-OUT
+	0x02171c20, 0x02171d10, 0x02171e21, 0x02171f04, // Pin widget 0x21 - HP1-OUT (Port-I)
+	0x05c50011, 0x05c40003, 0x05c50011, 0x05c40003, // dis. Silence detect delay turn off
+	0x0205003c, 0x0204f254, 0x0205003c, 0x0204f214, // Class-D power on reset
+	0x02050045, 0x0204b009, 0x02050063, 0x02040020, // Set TRS + turn off MIC2 VREFO
+							//  gating with HP-JD.
+	0x0205004a, 0x020420b0, 0x02050009, 0x02043803, // Enable HP JD + Set JD2 to 1 port
+							//  JD for WoV
+	0x0205000b, 0x0204777a, 0x0205000b, 0x0204777a, // Set TRS + Set JD2 pull up.
+	0x02050038, 0x02043909, 0x05c50000, 0x05c43482, // NID 0x20 set class-D to 2W@4ohm
+							//  (+12dB gain) + Set sine
+							//  tone gain(0x34)
+	0x05350000, 0x0534002a, 0x05350000, 0x0534002a, // Disable EQ + set 100Hz 2nd High
+							//  Pass filter
+	0x0535001d, 0x05340800, 0x0535001e, 0x05340800, // Left Channel-1
+	0x05350005, 0x053403f6, 0x05350006, 0x0534854c, // Left Channel-2
+	0x05350007, 0x05341e09, 0x05350008, 0x05346472, // Left Channel-3
+	0x05350009, 0x053401fb, 0x0535000a, 0x05344836, // Left Channel-4
+	0x0535000b, 0x05341c00, 0x0535000c, 0x05340000, // Left Channel-5
+	0x0535000d, 0x05340200, 0x0535000e, 0x05340000, // Left Channel-6
+	0x05450000, 0x05440000, 0x0545001d, 0x05440800, // Right Channel-1
+	0x0545001e, 0x05440800, 0x05450005, 0x054403f6, // Right Channel-2
+	0x05450006, 0x0544854c, 0x05450007, 0x05441e09, // Right Channel-3
+	0x05450008, 0x05446472, 0x05450009, 0x054401fb, // Right Channel-4
+	0x0545000a, 0x05444836, 0x0545000b, 0x05441c00, // Right Channel-5
+	0x0545000c, 0x05440000, 0x0545000d, 0x05440200, // Right Channel-6
+	0x0545000e, 0x05440000, 0x05350000, 0x0534c02a, // Right Channel-7+ EQ Update & Enable
+	0x05d50006, 0x05d44c50, 0x05d50002, 0x05d46004, // AGC-1 Disable + (Front Gain=0dB )
+	0x05d50003, 0x05d45e5e, 0x05d50001, 0x05d4d783, // AGC-2 (Back Boost Gain = -0.375dB,
+							//  Limiter = -1.125dB)
+	0x05d50009, 0x05d451ff, 0x05d50006, 0x05d44e50, // AGC-3 + AGC Enable
+	0x02050010, 0x02040020, 0x02050040, 0x02048800, // EAPD set to verb-control.
+	0x02050030, 0x02049000, 0x02050037, 0x0204fe15, // Class D silent detection Enable
+							//  -84dB threshold
+	0x05b50006, 0x05b40044, 0x05a50001, 0x05a4001f, // Set headphone gain and Set pin1
+							//  to GPIO2
+};
+
+const u32 pc_beep_verbs[] = {
+};
+
+AZALIA_ARRAY_SIZES;
diff --git a/src/mainboard/amd/mandolin/mainboard.c b/src/mainboard/amd/mandolin/mainboard.c
new file mode 100644
index 0000000000..2e66c65832
--- /dev/null
+++ b/src/mainboard/amd/mandolin/mainboard.c
@@ -0,0 +1,339 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <acpi/acpi.h>
+#include <amdblocks/amd_pci_util.h>
+#include <FspsUpd.h>
+#include <soc/cpu.h>
+#include <soc/southbridge.h>
+#include <soc/pci_devs.h>
+#include <soc/platform_descriptors.h>
+#include <soc/soc_util.h>
+#include <types.h>
+#include <commonlib/helpers.h>
+#include <chip.h>
+#include "gpio.h"
+
+/* TODO: recheck IRQ tables */
+
+/*
+ * These arrays set up the FCH PCI_INTR registers 0xC00/0xC01.
+ * This table is responsible for physically routing the PIC and
+ * IOAPIC IRQs to the different PCI devices on the system.  It
+ * is read and written via registers 0xC00/0xC01 as an
+ * Index/Data pair.  These values are chipset and mainboard
+ * dependent and should be updated accordingly.
+ */
+static uint8_t fch_pic_routing[0x80];
+static uint8_t fch_apic_routing[0x80];
+
+_Static_assert(sizeof(fch_pic_routing) == sizeof(fch_apic_routing),
+	"PIC and APIC FCH interrupt tables must be the same size");
+
+/*
+ * This table doesn't actually perform any routing. It only populates the
+ * PCI_INTERRUPT_LINE register on the PCI device with the PIC value specified
+ * in fch_apic_routing. The linux kernel only looks at this field as a backup
+ * if ACPI routing fails to describe the PCI routing correctly. The linux kernel
+ * also uses the APIC by default, so the value coded into the registers will be
+ * wrong.
+ *
+ * This table is also confusing because PCI Interrupt routing happens at the
+ * device/slot level, not the function level.
+ */
+static const struct pirq_struct mainboard_pirq_data[] = {
+	{ PCIE_GPP_0_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ PCIE_GPP_1_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ PCIE_GPP_2_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ PCIE_GPP_3_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ PCIE_GPP_4_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ PCIE_GPP_5_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ PCIE_GPP_6_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ PCIE_GPP_A_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ PCIE_GPP_B_DEVFN,	{ PIRQ_A, PIRQ_B, PIRQ_C, PIRQ_D } },
+	{ SMBUS_DEVFN,	{ PIRQ_SMBUS, PIRQ_NC, PIRQ_NC, PIRQ_NC } },
+};
+
+static const struct fch_irq_routing {
+	uint8_t intr_index;
+	uint8_t pic_irq_num;
+	uint8_t apic_irq_num;
+} mandolin_fch[] = {
+	{ PIRQ_A,	8,		16 },
+	{ PIRQ_B,	10,		17 },
+	{ PIRQ_C,	11,		18 },
+	{ PIRQ_D,	12,		19 },
+	{ PIRQ_SCI,	9,		 9 },
+	{ PIRQ_SD,	PIRQ_NC,	16 },
+	{ PIRQ_SDIO,	PIRQ_NC,	16 },
+	{ PIRQ_SATA,	PIRQ_NC,	19 },
+	{ PIRQ_EMMC,	PIRQ_NC,	17 },
+	{ PIRQ_GPIO,	 7,		 7 },
+	{ PIRQ_I2C2,	 6,		 6 },
+	{ PIRQ_I2C3,	14,		14 },
+	{ PIRQ_UART0,	 4,		 4 },
+	{ PIRQ_UART1,	 3,		 3 },
+	{ PIRQ_UART2,	 4,		 4 },
+	{ PIRQ_UART3,	 3,		 3 },
+
+	/* The MISC registers are not interrupt numbers */
+	{ PIRQ_MISC,	0xfa,		0x00 },
+	{ PIRQ_MISC0,	0x91,		0x00 },
+	{ PIRQ_MISC1,	0x00,		0x00 },
+	{ PIRQ_MISC2,	0x00,		0x00 },
+};
+
+static void init_tables(void)
+{
+	const struct fch_irq_routing *entry;
+	int i;
+
+	memset(fch_pic_routing, PIRQ_NC, sizeof(fch_pic_routing));
+	memset(fch_apic_routing, PIRQ_NC, sizeof(fch_apic_routing));
+
+	for (i = 0; i < ARRAY_SIZE(mandolin_fch); i++) {
+		entry = mandolin_fch + i;
+		fch_pic_routing[entry->intr_index] = entry->pic_irq_num;
+		fch_apic_routing[entry->intr_index] = entry->apic_irq_num;
+	}
+}
+
+static void pirq_setup(void)
+{
+	init_tables();
+
+	pirq_data_ptr = mainboard_pirq_data;
+	pirq_data_size = ARRAY_SIZE(mainboard_pirq_data);
+	intr_data_ptr = fch_apic_routing;
+	picr_data_ptr = fch_pic_routing;
+}
+
+static void mainboard_init(void *chip_info)
+{
+	struct soc_amd_picasso_config *cfg = config_of_soc();
+
+	if (!CONFIG(PICASSO_LPC_IOMUX))
+		cfg->sd_emmc_config = SD_EMMC_EMMC_HS400;
+
+	mainboard_program_gpios();
+}
+
+static const fsp_pcie_descriptor pco_pcie_descriptors[] = {
+	{ /* MXM */
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 8,
+		.end_lane = 15,
+		.device_number = 1,
+		.function_number = 1,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ6
+	},
+	{ /* SSD */
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 0,
+		.end_lane = 1,
+		.device_number = 1,
+		.function_number = 7,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ5
+	},
+	{ /* WLAN */
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 4,
+		.end_lane = 4,
+		.device_number = 1,
+		.function_number = 2,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ0
+	},
+	{ /* LAN */
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 5,
+		.end_lane = 5,
+		.device_number = 1,
+		.function_number = 3,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ1
+	},
+	{ /* WWAN */
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 2,
+		.end_lane = 2,
+		.device_number = 1,
+		.function_number = 4,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ2
+	},
+	{ /* WIFI */
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 3,
+		.end_lane = 3,
+		.gpio_group_id = 1,
+		.device_number = 1,
+		.function_number = 5,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ3
+	},
+	{ /* SATA EXPRESS */
+		.port_present = true,
+		.engine_type = SATA_ENGINE,
+		.start_lane = 6,
+		.end_lane = 7,
+		.gpio_group_id = 1,
+		.channel_type = SATA_CHANNEL_LONG,
+	}
+};
+
+static const fsp_pcie_descriptor dali_pcie_descriptors[] = {
+	{ // MXM
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 8,
+		.end_lane = 11,
+		.device_number = 1,
+		.function_number = 1,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ6
+	},
+	{ // SSD
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 0,
+		.end_lane = 1,
+		.device_number = 1,
+		.function_number = 7,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ5
+	},
+	{ // WLAN
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 4,
+		.end_lane = 4,
+		.device_number = 1,
+		.function_number = 2,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ0
+	},
+	{ // LAN
+		.port_present = true,
+		.engine_type = PCIE_ENGINE,
+		.start_lane = 5,
+		.end_lane = 5,
+		.device_number = 1,
+		.function_number = 3,
+		.link_aspm = ASPM_L1,
+		.link_aspm_L1_1 = true,
+		.link_aspm_L1_2 = true,
+		.turn_off_unused_lanes = true,
+		.clk_req = CLK_REQ1
+	}
+};
+
+static const fsp_ddi_descriptor pco_ddi_descriptors[] = {
+	{ // DDI0 - DP
+		.connector_type = DP,
+		.aux_index = AUX1,
+		.hdp_index = HDP1
+	},
+	{ /* DDI1 - eDP */
+		.connector_type = EDP,
+		.aux_index = AUX2,
+		.hdp_index = HDP2
+	},
+	{ /* DDI2 - DP */
+		.connector_type = DP,
+		.aux_index = AUX3,
+		.hdp_index = HDP3,
+	},
+	{ /* DDI3 - DP */
+		.connector_type = DP,
+		.aux_index = AUX4,
+		.hdp_index = HDP4,
+	}
+};
+
+static const fsp_ddi_descriptor dali_ddi_descriptors[] = {
+	{ // DDI0 - DP
+		.connector_type = DP,
+		.aux_index = AUX1,
+		.hdp_index = HDP1
+	},
+	{ // DDI1 - eDP
+		.connector_type = EDP,
+		.aux_index = AUX2,
+		.hdp_index = HDP2
+	},
+	{ // DDI2 - DP
+		.connector_type = DP,
+		.aux_index = AUX3,
+		.hdp_index = HDP3,
+	}
+};
+
+void mainboard_get_pcie_ddi_descriptors(
+		const fsp_pcie_descriptor **pcie_descs, size_t *pcie_num,
+		const fsp_ddi_descriptor **ddi_descs, size_t *ddi_num)
+{
+	/* Dali */
+	if (soc_is_dali()) {
+		*pcie_descs = dali_pcie_descriptors;
+		*pcie_num = ARRAY_SIZE(dali_pcie_descriptors);
+		*ddi_descs = dali_ddi_descriptors;
+		*ddi_num = ARRAY_SIZE(dali_ddi_descriptors);
+	}
+	/* Picasso and default */
+	else {
+		*pcie_descs = pco_pcie_descriptors;
+		*pcie_num = ARRAY_SIZE(pco_pcie_descriptors);
+		*ddi_descs = pco_ddi_descriptors;
+		*ddi_num = ARRAY_SIZE(pco_ddi_descriptors);
+	}
+}
+
+static void mandolin_enable(struct device *dev)
+{
+	printk(BIOS_INFO, "Mainboard " CONFIG_MAINBOARD_PART_NUMBER " Enable.\n");
+
+	/* Initialize the PIRQ data structures for consumption */
+	pirq_setup();
+}
+
+struct chip_operations mainboard_ops = {
+	.init = mainboard_init,
+	.enable_dev = mandolin_enable,
+};
diff --git a/src/mainboard/amd/mandolin/mandolin.fmd b/src/mainboard/amd/mandolin/mandolin.fmd
new file mode 100644
index 0000000000..c702ba9d8b
--- /dev/null
+++ b/src/mainboard/amd/mandolin/mandolin.fmd
@@ -0,0 +1,8 @@
+FLASH@0xFF800000 0x800000 {
+	BIOS@0x0 {
+		EC@0x0 0x21000
+		RW_MRC_CACHE@0x21000 0x10000
+		FMAP 0x1000
+		COREBOOT(CBFS)
+	}
+}
diff --git a/src/mainboard/amd/mandolin/romstage.c b/src/mainboard/amd/mandolin/romstage.c
new file mode 100644
index 0000000000..853b0877b3
--- /dev/null
+++ b/src/mainboard/amd/mandolin/romstage.c
@@ -0,0 +1 @@
+/* SPDX-License-Identifier: GPL-2.0-only */