soc/intel/xeon_sp: add ebg (Emmitsburg PCH) directory

EBG (Emmitsburg) PCH is used in Intel SPR-SP chipset.

These changes are in accordance with the documentation:
* Intel(R) Emmitsburg Platform Controller Hub External Design
Specification. Document Number: 606161
* Emmitsburg PCH BIOS Specification. Document Number: 631063.

Signed-off-by: Jonathan Zhang <jonzhang@meta.com>
Signed-off-by: Tim Chu <Tim.Chu@quantatw.com>
Change-Id: I393c1df75a344519fca7d680116f41f5f8bd9e87
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71945
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>

9 files changed, 838 insertions, 0 deletions

diff --git a/src/soc/intel/xeon_sp/ebg/Makefile.inc b/src/soc/intel/xeon_sp/ebg/Makefile.inc
new file mode 100644
index 0000000000..ea29e2d853
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/Makefile.inc
@@ -0,0 +1,7 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+bootblock-y += soc_gpio.c soc_pch.c
+romstage-y += soc_gpio.c soc_pmutil.c
+ramstage-y += lockdown.c soc_gpio.c soc_pch.c soc_pmutil.c
+
+CPPFLAGS_common += -I$(src)/soc/intel/xeon_sp/ebg/include
diff --git a/src/soc/intel/xeon_sp/ebg/include/soc/gpio_soc_defs.h b/src/soc/intel/xeon_sp/ebg/include/soc/gpio_soc_defs.h
new file mode 100644
index 0000000000..a6df61567f
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/include/soc/gpio_soc_defs.h
@@ -0,0 +1,385 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef EMMITSBURG_GPIO_DEFS_H
+#define EMMITSBURG_GPIO_DEFS_H
+
+#ifndef __ACPI__
+#include <stddef.h>
+#endif
+
+/* GPIO Community 0 */
+#define COMM_0			0
+#define  GPPC_A			0x0
+#define  GPPC_B			0x1
+#define  GPPC_S			0x2
+/* GPIO Community 1 */
+#define COMM_1			1
+#define  GPPC_C			0x3
+#define  GPP_D			0x4
+/* GPIO Community 3 */
+#define COMM_3			2
+#define  GPP_E			0x5
+/* GPIO Community 4 */
+#define COMM_4			3
+#define  GPPC_H			0x6
+#define  GPPC_J			0x7
+/* GPIO Community 5 */
+#define COMM_5			4
+#define  GPP_I			0x8
+#define  GPP_L			0x9
+#define  GPP_M			0xA
+#define  GPP_N			0xB
+/* GPIO Community 2 */
+#define COMM_2			5
+#define  GPP_O			0xC
+
+#define GPIO_MAX_NUM_PER_GROUP		24
+
+/* Group A */
+#define GPPC_A0			0
+#define GPPC_A1			1
+#define GPPC_A2			2
+#define GPPC_A3			3
+#define GPPC_A4			4
+#define GPPC_A5			5
+#define GPPC_A6			6
+#define GPPC_A7			7
+#define GPPC_A8			8
+#define GPPC_A9			9
+#define GPPC_A10		10
+#define GPPC_A11		11
+#define GPPC_A12		12
+#define GPPC_A13		13
+#define GPPC_A14		14
+#define GPPC_A15		15
+#define GPPC_A16		16
+#define GPPC_A17		17
+#define GPPC_A18		18
+#define GPPC_A19		19
+#define ESPI_CLK_LOOPBK		20
+
+/* Group B */
+#define GPPC_B0			21
+#define GPPC_B1			22
+#define GPPC_B2			23
+#define GPPC_B3			24
+#define GPPC_B4			25
+#define GPPC_B5			26
+#define GPPC_B6			27
+#define GPPC_B7			28
+#define GPPC_B8			29
+#define GPPC_B9			30
+#define GPPC_B10		31
+#define GPPC_B11		32
+#define GPPC_B12		33
+#define GPPC_B13		34
+#define GPPC_B14		35
+#define GPPC_B15		36
+#define GPPC_B16		37
+#define GPPC_B17		38
+#define GPPC_B18		39
+#define GPPC_B19		40
+#define GPPC_B20		41
+#define GPPC_B21		42
+#define GPPC_B22		43
+#define GPPC_B23		44
+
+/*
+ * Order 45-52 belongs to fields which are not described in EDS but
+ * can be found while using Cscript. Keep the order here to make GPIO
+ * table can be set as expected.
+ */
+
+/* Group S */
+#define GPPC_S0			53
+#define GPPC_S1			54
+#define GPPC_S2			55
+#define GPPC_S3			56
+#define GPPC_S4			57
+#define GPPC_S5			58
+#define GPPC_S6			59
+#define GPPC_S7			60
+#define GPPC_S8			61
+#define GPPC_S9			62
+#define GPPC_S10		63
+#define GPPC_S11		64
+#define SPI_CLK_LOOPBK		65
+
+#define NUM_GPIO_COM0_PADS	(SPI_CLK_LOOPBK - GPPC_A0 + 1)
+
+/* Community 1 */
+/* Group C */
+#define GPPC_C0			66
+#define GPPC_C1			67
+#define GPPC_C2			68
+#define GPPC_C3			69
+#define GPPC_C4			70
+#define GPPC_C5			71
+#define GPPC_C6			72
+#define GPPC_C7			73
+#define GPPC_C8			74
+#define GPPC_C9			75
+#define GPPC_C10		76
+#define GPPC_C11		77
+#define GPPC_C12		78
+#define GPPC_C13		79
+#define GPPC_C14		80
+#define GPPC_C15		81
+#define GPPC_C16		82
+#define GPPC_C17		83
+#define GPPC_C18		84
+#define GPPC_C19		85
+#define GPPC_C20		86
+#define GPPC_C21		87
+
+/* Group D */
+#define GPP_D0			88
+#define GPP_D1			89
+#define GPP_D2			90
+#define GPP_D3			91	// Not described in EDS
+#define GPP_D4			92	// Not described in EDS
+#define GPP_D5			93	// Not described in EDS
+#define GPP_D6			94
+#define GPP_D7			95
+#define GPP_D8			96
+#define GPP_D9			97
+#define GPP_D10			98
+#define GPP_D11			99
+#define GPP_D12			100
+#define GPP_D13			101
+#define GPP_D14			102
+#define GPP_D15			103
+#define GPP_D16			104
+#define GPP_D17			105
+#define GPP_D18			106
+#define GPP_D19			107
+#define GPP_D20			108
+#define GPP_D21			109
+#define GPP_D22			110
+#define GPP_D23			111
+
+#define NUM_GPIO_COM1_PADS	(GPP_D23 - GPPC_C0 + 1)
+
+/* Community 3 */
+/* Group E */
+#define GPP_E0			112
+#define GPP_E1			113
+#define GPP_E2			114
+#define GPP_E3			115
+#define GPP_E4			116
+#define GPP_E5			117
+#define GPP_E6			118
+#define GPP_E7			119
+#define GPP_E8			120
+#define GPP_E9			121
+#define GPP_E10			122
+#define GPP_E11			123
+#define GPP_E12			124
+#define GPP_E13			125
+#define GPP_E14			126
+#define GPP_E15			127
+#define GPP_E16			128
+#define GPP_E17			129
+#define GPP_E18			130
+#define GPP_E19			131
+#define GPP_E20			132	// Not described in EDS
+#define GPP_E21			133	// Not described in EDS
+#define GPP_E22			134	// Not described in EDS
+#define GPP_E23			135	// Not described in EDS
+
+#define NUM_GPIO_COM3_PADS	(GPP_E23 - GPP_E0 + 1)
+
+/* Community 4 */
+/* Group H */
+#define GPPC_H0			136
+#define GPPC_H1			137
+#define GPPC_H2			138	// Not described in EDS
+#define GPPC_H3			139	// Not described in EDS
+#define GPPC_H4			140	// Not described in EDS
+#define GPPC_H5			141	// Not described in EDS
+#define GPPC_H6			142
+#define GPPC_H7			143
+#define GPPC_H8			144	// Not described in EDS
+#define GPPC_H9			145	// Not described in EDS
+#define GPPC_H10		146	// Not described in EDS
+#define GPPC_H11		147	// Not described in EDS
+#define GPPC_H12		148	// Not described in EDS
+#define GPPC_H13		149	// Not described in EDS
+#define GPPC_H14		150	// Not described in EDS
+#define GPPC_H15		151
+#define GPPC_H16		152
+#define GPPC_H17		153
+#define GPPC_H18		154
+#define GPPC_H19		155
+
+/* Group J */
+#define GPP_J0			156
+#define GPP_J1			157
+#define GPP_J2			158
+#define GPP_J3			159
+#define GPP_J4			160
+#define GPP_J5			161
+#define GPP_J6			162
+#define GPP_J7			163
+#define GPP_J8			164
+#define GPP_J9			165	// Not described in EDS
+#define GPP_J10			166	// Not described in EDS
+#define GPP_J11			167	// Not described in EDS
+#define GPP_J12			168
+#define GPP_J13			169
+#define GPP_J14			170
+#define GPP_J15			171
+#define GPP_J16			172	// Not described in EDS
+#define GPP_J17			173	// Not described in EDS
+
+#define NUM_GPIO_COM4_PADS	(GPP_J17 - GPPC_H0 + 1)
+
+/* Community 5 */
+/* Group I */
+#define GPP_I0			180	// Not described in EDS
+#define GPP_I1			181	// Not described in EDS
+#define GPP_I2			182	// Not described in EDS
+#define GPP_I3			183	// Not described in EDS
+#define GPP_I4			184	// Not described in EDS
+#define GPP_I5			185	// Not described in EDS
+#define GPP_I6			186	// Not described in EDS
+#define GPP_I7			187	// Not described in EDS
+#define GPP_I8			188	// Not described in EDS
+#define GPP_I9			189	// Not described in EDS
+#define GPP_I10			190	// Not described in EDS
+#define GPP_I11			191	// Not described in EDS
+#define GPP_I12			192
+#define GPP_I13			193
+#define GPP_I14			194
+#define GPP_I15			195
+#define GPP_I16			196
+#define GPP_I17			197
+#define GPP_I18			198	// Not described in EDS
+#define GPP_I19			199	// Not described in EDS
+#define GPP_I20			200	// Not described in EDS
+#define GPP_I21			201
+#define GPP_I22			202
+#define GPP_I23			203
+
+/* Group L */
+#define GPP_L0			204
+#define GPP_L1			205
+#define GPP_L2			206
+#define GPP_L3			207
+#define GPP_L4			208
+#define GPP_L5			209
+#define GPP_L6			210
+#define GPP_L7			211
+#define GPP_L8			212
+#define GPP_L9			213	// Not described in EDS
+#define GPP_L10			214	// Not described in EDS
+#define GPP_L11			215	// Not described in EDS
+#define GPP_L12			216	// Not described in EDS
+#define GPP_L13			217	// Not described in EDS
+#define GPP_L14			218	// Not described in EDS
+#define GPP_L15			219	// Not described in EDS
+#define GPP_L16			220	// Not described in EDS
+#define GPP_L17			221	// Not described in EDS
+
+/* Group M */
+#define GPP_M0			222
+#define GPP_M1			223
+#define GPP_M2			224
+#define GPP_M3			225
+#define GPP_M4			226
+#define GPP_M5			227
+#define GPP_M6			228
+#define GPP_M7			229
+#define GPP_M8			230
+#define GPP_M9			231	// Not described in EDS
+#define GPP_M10			232	// Not described in EDS
+#define GPP_M11			233
+#define GPP_M12			234
+#define GPP_M13			235	// Not described in EDS
+#define GPP_M14			236	// Not described in EDS
+#define GPP_M15			237
+#define GPP_M16			238
+#define GPP_M17			239
+
+/* Group N */
+#define GPP_N0			240	// Not described in EDS
+#define GPP_N1			241
+#define GPP_N2			242	// Not described in EDS
+#define GPP_N3			243	// Not described in EDS
+#define GPP_N4			244
+#define GPP_N5			245	// Not described in EDS
+#define GPP_N6			246	// Not described in EDS
+#define GPP_N7			247	// Not described in EDS
+#define GPP_N8			248	// Not described in EDS
+#define GPP_N9			249	// Not described in EDS
+#define GPP_N10			250	// Not described in EDS
+#define GPP_N11			251	// Not described in EDS
+#define GPP_N12			252	// Not described in EDS
+#define GPP_N13			253	// Not described in EDS
+#define GPP_N14			254	// Not described in EDS
+#define GPP_N15			255	// Not described in EDS
+#define GPP_N16			256	// Not described in EDS
+#define GPP_N17			257	// Not described in EDS
+
+#define NUM_GPIO_COM5_PADS	(GPP_N17 - GPP_I0 + 1)
+
+/* Community 2 */
+/* Group O */
+#define GPP_O0			258
+#define GPP_O1			259
+#define GPP_O2			260
+#define GPP_O3			261
+#define GPP_O4			262
+#define GPP_O5			263
+#define GPP_O6			264
+#define GPP_O7			265
+#define GPP_O8			266
+#define GPP_O9			267
+#define GPP_O10			268
+#define GPP_O11			269
+#define GPP_O12			270
+#define GPP_O13			271
+#define GPP_O14			272
+#define GPP_O15			273
+#define GPP_O16			274
+
+#define NUM_GPIO_COM2_PADS	(GPP_O16 - GPP_O0 + 1)
+
+#define TOTAL_PADS		(GPP_O16 + 1)
+
+#define GPIO_NUM_PAD_CFG_REGS   4 /* DW0, DW1, DW2, DW3 */
+
+#define NUM_GPIO_COMx_GPI_REGS(n)	\
+		(ALIGN_UP((n), GPIO_MAX_NUM_PER_GROUP) / GPIO_MAX_NUM_PER_GROUP)
+
+#define NUM_GPIO_COM0_GPI_REGS NUM_GPIO_COMx_GPI_REGS(NUM_GPIO_COM0_PADS)
+#define NUM_GPIO_COM1_GPI_REGS NUM_GPIO_COMx_GPI_REGS(NUM_GPIO_COM1_PADS)
+#define NUM_GPIO_COM2_GPI_REGS NUM_GPIO_COMx_GPI_REGS(NUM_GPIO_COM2_PADS)
+#define NUM_GPIO_COM3_GPI_REGS NUM_GPIO_COMx_GPI_REGS(NUM_GPIO_COM3_PADS)
+#define NUM_GPIO_COM4_GPI_REGS NUM_GPIO_COMx_GPI_REGS(NUM_GPIO_COM4_PADS)
+#define NUM_GPIO_COM5_GPI_REGS NUM_GPIO_COMx_GPI_REGS(NUM_GPIO_COM5_PADS)
+
+#define NUM_GPI_STATUS_REGS			\
+		((NUM_GPIO_COM0_GPI_REGS) +	\
+		(NUM_GPIO_COM1_GPI_REGS)  +	\
+		(NUM_GPIO_COM3_GPI_REGS)  +	\
+		(NUM_GPIO_COM4_GPI_REGS)  +	\
+		(NUM_GPIO_COM5_GPI_REGS)  +	\
+		(NUM_GPIO_COM2_GPI_REGS))
+
+/* Register defines */
+#define GPIO_MISCCFG		0x10
+
+#define HOSTSW_OWN_REG_0	0x130
+#define PAD_CFG_BASE		0x700
+#define GPI_INT_STS_0		0x200
+#define GPI_INT_EN_0		0x210
+#define GPI_SMI_STS_0		0x270
+#define GPI_SMI_EN_0		0x290
+
+#define PAD_CFG_LOCK_A		0x100
+#define PAD_CFG_LOCK_B		0x108
+#define PAD_CFG_LOCK_C		0x100
+#define PAD_CFG_LOCK_D		0x108
+
+#endif /* EMMITSBURG_GPIO_DEFS_H */
diff --git a/src/soc/intel/xeon_sp/ebg/include/soc/pcr_ids.h b/src/soc/intel/xeon_sp/ebg/include/soc/pcr_ids.h
new file mode 100644
index 0000000000..d8ee4e0e78
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/include/soc/pcr_ids.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _PCR_IDS_H_
+#define _PCR_IDS_H_
+
+#define PID_CSME0	0x90
+#define PID_ITSS	0xC4
+#define PID_RTC		0xC3
+#define PID_PSF3	0xBC
+#define PID_DMI		0x88
+#define PID_GPIOCOM5	0x69
+#define PID_GPIOCOM4	0x6a
+#define PID_GPIOCOM3	0x6b
+#define PID_GPIOCOM2	0x6c
+#define PID_GPIOCOM1	0x6d
+#define PID_GPIOCOM0	0x6e
+
+#endif	/* _PCR_IDS_H_ */
diff --git a/src/soc/intel/xeon_sp/ebg/include/soc/pmc.h b/src/soc/intel/xeon_sp/ebg/include/soc/pmc.h
new file mode 100644
index 0000000000..5f80503a61
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/include/soc/pmc.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _SOC_PMC_H_
+#define _SOC_PMC_H_
+
+/* PCI Configuration Space (D31:F2): PMC */
+#define PWRMBASE		0x10
+#define ABASE			0x20
+/* Memory mapped IO registers in PMC */
+#define GEN_PMCON_A		0x1020
+#define  GBL_RST_STS		(1 << 24)
+#define  DISB			(1 << 23)
+#define  MS4V			(1 << 18)
+#define  SUS_PWR_FLR		(1 << 16)
+#define  PWR_FLR		(1 << 14)
+#define  HOST_RST_STS		(1 << 9)
+#define  SLEEP_AFTER_POWER_FAIL	(1 << 0)
+#define GEN_PMCON_B		0x1024
+#define  SLP_STR_POL_LOCK	(1 << 18)
+#define  SMI_LOCK		(1 << 4)
+#define  RTC_BATTERY_DEAD	(1 << 2)
+#define PM_CFG			0x1818
+#define  PMC_LOCK		(1 << 27)
+#define PMSYNC_MISC_CFG		0x18c8
+#define  PMSYNC_LOCK		(1 << 15)
+#define PCH_PWRM_ACPI_TMR_CTL	0x18fc
+#define  ACPI_TIM_DIS		(1 << 1)
+#define GPIO_GPE_CFG		0x1920
+#define  GPE0_DWX_MASK		0xf
+#define GPE0_DW_SHIFT(x)	(4 * (x))
+#define GBLRST_CAUSE0		0x1924
+#define GBLRST_CAUSE1		0x1928
+#define ACTL			0x1BD8
+#define PMC_ACPI_CNT		0x1BD8
+#define  PWRM_EN		(1 << 8)
+#define  ACPI_EN		(1 << 7)
+#define  SCI_IRQ_SEL		(7 << 0)
+#define  SCI_IRQ_ADJUST		0
+#define  SCIS_IRQ9		0
+#define  SCIS_IRQ10		1
+#define  SCIS_IRQ11		2
+#define  SCIS_IRQ20		4
+#define  SCIS_IRQ21		5
+#define  SCIS_IRQ22		6
+#define  SCIS_IRQ23		7
+#define ST_PG_FDIS1		0x1e20
+#define  ST_FDIS_LK		(1 << 31)
+
+#endif
diff --git a/src/soc/intel/xeon_sp/ebg/include/soc/soc_pch.h b/src/soc/intel/xeon_sp/ebg/include/soc/soc_pch.h
new file mode 100644
index 0000000000..2d87be34ec
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/include/soc/soc_pch.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _SOC_SOC_PCH_H_
+#define _SOC_SOC_PCH_H_
+
+void pch_lock_dmictl(void);
+
+#endif /* _SOC_SOC_PCH_H_ */
diff --git a/src/soc/intel/xeon_sp/ebg/lockdown.c b/src/soc/intel/xeon_sp/ebg/lockdown.c
new file mode 100644
index 0000000000..694e4a24a3
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/lockdown.c
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <intelblocks/cfg.h>
+#include <intelblocks/fast_spi.h>
+#include <intelpch/lockdown.h>
+#include <soc/lockdown.h>
+
+void sata_lockdown_config(int chipset_lockdown)
+{
+}
+
+void spi_lockdown_config(int chipset_lockdown)
+{
+	if (chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT) {
+		fast_spi_set_bde();
+		fast_spi_set_vcl();
+	}
+}
diff --git a/src/soc/intel/xeon_sp/ebg/soc_gpio.c b/src/soc/intel/xeon_sp/ebg/soc_gpio.c
new file mode 100644
index 0000000000..826b5e7bb9
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/soc_gpio.c
@@ -0,0 +1,190 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <gpio.h>
+#include <intelblocks/pcr.h>
+#include <soc/pcr_ids.h>
+#include <soc/pm.h>
+
+/*
+ * Reset mapping
+ * 00 = RSMRST#
+ * 01 = Host Deep Reset
+ * 10 = PLTRST#
+ * 11 = Reserved
+ */
+static const struct reset_mapping rst_map[] = {
+	{ .logical = PAD_CFG0_LOGICAL_RESET_RSMRST, .chipset = 0U << 30 },
+	{ .logical = PAD_CFG0_LOGICAL_RESET_DEEP,   .chipset = 1U << 30 },
+	{ .logical = PAD_CFG0_LOGICAL_RESET_PLTRST, .chipset = 2U << 30 },
+};
+
+static const struct pad_group emmitsburg_community0_groups[] = {
+	INTEL_GPP(GPPC_A0, GPPC_A0, ESPI_CLK_LOOPBK),	/* GPPC A */
+	INTEL_GPP(GPPC_A0, GPPC_B0, GPPC_B23),		/* GPPC B */
+	INTEL_GPP(GPPC_A0, GPPC_S0, SPI_CLK_LOOPBK),	/* GPPC S */
+};
+
+static const struct pad_group emmitsburg_community1_groups[] = {
+	INTEL_GPP(GPPC_C0, GPPC_C0, GPPC_C21),		/* GPPC C */
+	INTEL_GPP(GPPC_C0, GPP_D0, GPP_D23),		/* GPP D */
+};
+
+static const struct pad_group emmitsburg_community3_groups[] = {
+	INTEL_GPP(GPP_E0, GPP_E0, GPP_E23),		/* GPP E */
+};
+
+static const struct pad_group emmitsburg_community4_groups[] = {
+	INTEL_GPP(GPPC_H0, GPPC_H0, GPPC_H19),		/* GPPC H */
+	INTEL_GPP(GPPC_H0, GPP_J0, GPP_J17),		/* GPP J */
+};
+
+static const struct pad_group emmitsburg_community5_groups[] = {
+	INTEL_GPP(GPP_I0, GPP_I0, GPP_I23),		/* GPP I */
+	INTEL_GPP(GPP_I0, GPP_L0, GPP_L17),		/* GPP L */
+	INTEL_GPP(GPP_I0, GPP_M0, GPP_M17),		/* GPP M */
+	INTEL_GPP(GPP_I0, GPP_N0, GPP_N17),		/* GPP N */
+};
+
+static const struct pad_group emmitsburg_community2_groups[] = {
+	INTEL_GPP(GPP_O0, GPP_O0, GPP_O16),       /* GPP O */
+};
+
+static const struct pad_community emmitsburg_gpio_communities[] = {
+	[COMM_0] = { /* GPIO Community 0: GPPC A, B, S */
+		.port               = PID_GPIOCOM0,
+		.first_pad          = GPPC_A0,
+		.last_pad           = SPI_CLK_LOOPBK,
+		.num_gpi_regs       = NUM_GPIO_COM0_GPI_REGS,
+		.pad_cfg_base       = PAD_CFG_BASE,
+		.host_own_reg_0     = HOSTSW_OWN_REG_0,
+		.gpi_int_sts_reg_0  = GPI_INT_STS_0,
+		.gpi_int_en_reg_0   = GPI_INT_EN_0,
+		.gpi_smi_sts_reg_0  = GPI_SMI_STS_0,
+		.gpi_smi_en_reg_0   = GPI_SMI_EN_0,
+		.max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+		.name               = "GPIO_COM0",
+		.acpi_path          = "\\_SB.PCI0.GPIO",
+		.reset_map          = rst_map,
+		.num_reset_vals     = ARRAY_SIZE(rst_map),
+		.groups             = emmitsburg_community0_groups,
+		.num_groups         = ARRAY_SIZE(emmitsburg_community0_groups),
+	},
+	[COMM_1] = { /* GPIO Community 1: GPPC C, GPP D */
+		.port               = PID_GPIOCOM1,
+		.first_pad          = GPPC_C0,
+		.last_pad           = GPP_D23,
+		.num_gpi_regs       = NUM_GPIO_COM1_GPI_REGS,
+		.pad_cfg_base       = PAD_CFG_BASE,
+		.host_own_reg_0     = HOSTSW_OWN_REG_0,
+		.gpi_int_sts_reg_0  = GPI_INT_STS_0,
+		.gpi_int_en_reg_0   = GPI_INT_EN_0,
+		.gpi_smi_sts_reg_0  = GPI_SMI_STS_0,
+		.gpi_smi_en_reg_0   = GPI_SMI_EN_0,
+		.max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+		.name               = "GPIO_COM1",
+		.acpi_path          = "\\_SB.PCI0.GPIO",
+		.reset_map          = rst_map,
+		.num_reset_vals     = ARRAY_SIZE(rst_map),
+		.groups             = emmitsburg_community1_groups,
+		.num_groups         = ARRAY_SIZE(emmitsburg_community1_groups),
+	},
+	[COMM_3] = { /* GPIO Community 3: GPP E */
+		.port               = PID_GPIOCOM3,
+		.first_pad          = GPP_E0,
+		.last_pad           = GPP_E23,
+		.num_gpi_regs       = NUM_GPIO_COM3_GPI_REGS,
+		.pad_cfg_base       = PAD_CFG_BASE,
+		.host_own_reg_0     = HOSTSW_OWN_REG_0,
+		.gpi_int_sts_reg_0  = GPI_INT_STS_0,
+		.gpi_int_en_reg_0   = GPI_INT_EN_0,
+		.gpi_smi_sts_reg_0  = GPI_SMI_STS_0,
+		.gpi_smi_en_reg_0   = GPI_SMI_EN_0,
+		.max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+		.name               = "GPIO_COM3",
+		.acpi_path          = "\\_SB.PCI0.GPIO",
+		.reset_map          = rst_map,
+		.num_reset_vals     = ARRAY_SIZE(rst_map),
+		.groups             = emmitsburg_community3_groups,
+		.num_groups         = ARRAY_SIZE(emmitsburg_community3_groups),
+	},
+	[COMM_4] = { /* GPIO Community 4: GPPC H, J */
+		.port               = PID_GPIOCOM4,
+		.first_pad          = GPPC_H0,
+		.last_pad           = GPP_J17,
+		.num_gpi_regs       = NUM_GPIO_COM4_GPI_REGS,
+		.pad_cfg_base       = PAD_CFG_BASE,
+		.host_own_reg_0     = HOSTSW_OWN_REG_0,
+		.gpi_int_sts_reg_0  = GPI_INT_STS_0,
+		.gpi_int_en_reg_0   = GPI_INT_EN_0,
+		.gpi_smi_sts_reg_0  = GPI_SMI_STS_0,
+		.gpi_smi_en_reg_0   = GPI_SMI_EN_0,
+		.max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+		.name               = "GPIO_COM4",
+		.acpi_path          = "\\_SB.PCI0.GPIO",
+		.reset_map          = rst_map,
+		.num_reset_vals     = ARRAY_SIZE(rst_map),
+		.groups             = emmitsburg_community4_groups,
+		.num_groups         = ARRAY_SIZE(emmitsburg_community4_groups),
+	},
+	[COMM_5] = { /* GPIO Community 5: GPP I, L, M, N */
+		.port               = PID_GPIOCOM5,
+		.first_pad          = GPP_I0,
+		.last_pad           = GPP_N17,
+		.num_gpi_regs       = NUM_GPIO_COM5_GPI_REGS,
+		.pad_cfg_base       = PAD_CFG_BASE,
+		.host_own_reg_0     = HOSTSW_OWN_REG_0,
+		.gpi_int_sts_reg_0  = GPI_INT_STS_0,
+		.gpi_int_en_reg_0   = GPI_INT_EN_0,
+		.gpi_smi_sts_reg_0  = GPI_SMI_STS_0,
+		.gpi_smi_en_reg_0   = GPI_SMI_EN_0,
+		.max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+		.name               = "GPIO_COM5",
+		.acpi_path          = "\\_SB.PCI0.GPIO",
+		.reset_map          = rst_map,
+		.num_reset_vals     = ARRAY_SIZE(rst_map),
+		.groups             = emmitsburg_community5_groups,
+		.num_groups         = ARRAY_SIZE(emmitsburg_community5_groups),
+	},
+	[COMM_2] = { /* GPIO Community 2: GPP O */
+		.port               = PID_GPIOCOM2,
+		.first_pad          = GPP_O0,
+		.last_pad           = GPP_O16,
+		.num_gpi_regs       = NUM_GPIO_COM2_GPI_REGS,
+		.pad_cfg_base       = PAD_CFG_BASE,
+		.host_own_reg_0     = HOSTSW_OWN_REG_0,
+		.gpi_int_sts_reg_0  = GPI_INT_STS_0,
+		.gpi_int_en_reg_0   = GPI_INT_EN_0,
+		.gpi_smi_sts_reg_0  = GPI_SMI_STS_0,
+		.gpi_smi_en_reg_0   = GPI_SMI_EN_0,
+		.max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+		.name               = "GPIO_COM2",
+		.acpi_path          = "\\_SB.PCI0.GPIO",
+		.reset_map          = rst_map,
+		.num_reset_vals     = ARRAY_SIZE(rst_map),
+		.groups             = emmitsburg_community2_groups,
+		.num_groups         = ARRAY_SIZE(emmitsburg_community2_groups),
+	},
+};
+
+const struct pad_community *soc_gpio_get_community(size_t *num_communities)
+{
+	*num_communities = ARRAY_SIZE(emmitsburg_gpio_communities);
+	return emmitsburg_gpio_communities;
+}
+
+const struct pmc_to_gpio_route *soc_pmc_gpio_routes(size_t *num)
+{
+	static const struct pmc_to_gpio_route routes[] = {
+		{ GPPC_A, GPPC_A },
+		{ GPPC_B, GPPC_B },
+		{ GPPC_S, GPPC_S },
+		{ GPPC_C, GPPC_C },
+		{ GPP_D, GPP_D },
+		{ GPP_E, GPP_E },
+		{ GPPC_H, GPPC_H },
+		{ GPPC_J, GPPC_J },
+	};
+
+	*num = ARRAY_SIZE(routes);
+	return routes;
+}
diff --git a/src/soc/intel/xeon_sp/ebg/soc_pch.c b/src/soc/intel/xeon_sp/ebg/soc_pch.c
new file mode 100644
index 0000000000..d99516fc57
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/soc_pch.c
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/pci_ops.h>
+#include <soc/pci_devs.h>
+#include <soc/pcr_ids.h>
+#include <intelblocks/pcr.h>
+#include <intelblocks/rtc.h>
+#include <intelblocks/p2sb.h>
+#include <soc/bootblock.h>
+#include <soc/soc_pch.h>
+#include <soc/pmc.h>
+#include <console/console.h>
+
+#define PCR_PSF3_TO_SHDW_PMC_REG_BASE	0x600
+#define PCR_PSFX_TO_SHDW_BAR4		0x10
+#define PCR_PSFX_TO_SHDW_PCIEN_IOEN	0x01
+#define PCR_PSFX_T0_SHDW_PCIEN		0x1C
+#define PCR_DMI_MISC_PORT_CFG		0x20D8
+#define  MISC_PORT_CFG_LOCK		BIT(23)
+#define PCR_DMI_DMICTL		0x2234
+#define  PCR_DMI_DMICTL_SRLOCK	(1 << 31)
+
+static void soc_config_acpibase(void)
+{
+	uint32_t pmc_reg_value;
+	uint32_t pmc_base_reg = PCR_PSF3_TO_SHDW_PMC_REG_BASE;
+
+	pmc_reg_value = pcr_read32(PID_PSF3, pmc_base_reg + PCR_PSFX_TO_SHDW_BAR4);
+
+	if (pmc_reg_value != 0xffffffff) {
+		/* Disable Io Space before changing the address */
+		pcr_rmw32(PID_PSF3, pmc_base_reg + PCR_PSFX_T0_SHDW_PCIEN,
+				~PCR_PSFX_TO_SHDW_PCIEN_IOEN, 0);
+		/* Program ABASE in PSF3 PMC space BAR4*/
+		pcr_write32(PID_PSF3, pmc_base_reg + PCR_PSFX_TO_SHDW_BAR4,
+				ACPI_BASE_ADDRESS);
+		/* Enable IO Space */
+		pcr_rmw32(PID_PSF3, pmc_base_reg + PCR_PSFX_T0_SHDW_PCIEN,
+				~0, PCR_PSFX_TO_SHDW_PCIEN_IOEN);
+	}
+	/* Enable Bus Master and IO Space */
+	pci_or_config16(PCH_DEV_PMC, PCI_COMMAND, (PCI_COMMAND_IO | PCI_COMMAND_MASTER));
+
+	uint16_t data = pcr_read16(PID_PSF3, pmc_base_reg + PCR_PSFX_TO_SHDW_BAR4);
+	printk(BIOS_INFO, "%s : pmbase = %x\n", __func__, (int)data);
+}
+
+void bootblock_pch_init(void)
+{
+	/*
+	 * Enabling ABASE for accessing PM1_STS, PM1_EN, PM1_CNT
+	 */
+	soc_config_acpibase();
+}
+
+void pch_lock_dmictl(void)
+{
+	uint32_t reg32 = pcr_read32(PID_DMI, PCR_DMI_DMICTL);
+	pcr_write32(PID_DMI, PCR_DMI_DMICTL, reg32 | PCR_DMI_DMICTL_SRLOCK);
+	pcr_or32(PID_DMI, PCR_DMI_MISC_PORT_CFG, MISC_PORT_CFG_LOCK);
+}
diff --git a/src/soc/intel/xeon_sp/ebg/soc_pmutil.c b/src/soc/intel/xeon_sp/ebg/soc_pmutil.c
new file mode 100644
index 0000000000..7160dee791
--- /dev/null
+++ b/src/soc/intel/xeon_sp/ebg/soc_pmutil.c
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * Helper functions for dealing with power management registers
+ * and the differences between PCH variants.
+ */
+
+#define __SIMPLE_DEVICE__
+
+#include <console/console.h>
+#include <device/pci.h>
+#include <intelblocks/pmclib.h>
+#include <intelblocks/rtc.h>
+#include <soc/pm.h>
+#include <soc/pmc.h>
+
+uint8_t *pmc_mmio_regs(void)
+{
+	/* PMC PWRMBASE can be hidden after FSP-S so can't be accessed using PCI CSR,
+	 * hence use hard-coded address */
+	return (void *)(uintptr_t)PCH_PWRM_BASE_ADDRESS;
+}
+
+uintptr_t soc_read_pmc_base(void)
+{
+	return (uintptr_t)(pmc_mmio_regs());
+}
+
+uint32_t *soc_pmc_etr_addr(void)
+{
+	/*
+	 * The pointer returned must not be cached, because the address depends on the
+	 * MMCONF base address and the assigned PCI bus number, which both may change
+	 * during the boot process!
+	 */
+	return (uint32_t *)(soc_read_pmc_base() + ETR);
+}
+
+int soc_get_rtc_failed(void)
+{
+	uint32_t pmcon_b = read32(pmc_mmio_regs() + GEN_PMCON_B);
+	int rtc_fail = !!(pmcon_b & RTC_BATTERY_DEAD);
+
+	if (rtc_fail)
+		printk(BIOS_ERR, "%s: RTC battery dead or removed\n", __func__);
+
+	return rtc_fail;
+}
+
+void soc_fill_power_state(struct chipset_power_state *ps)
+{
+	uint8_t *pmc;
+
+	pmc = pmc_mmio_regs();
+
+	ps->gen_pmcon_a = read32(pmc + GEN_PMCON_A);
+	ps->gen_pmcon_b = read32(pmc + GEN_PMCON_B);
+	ps->gblrst_cause[0] = read32(pmc + GBLRST_CAUSE0);
+	ps->gblrst_cause[1] = read32(pmc + GBLRST_CAUSE1);
+
+	printk(BIOS_DEBUG, "GEN_PMCON: %08x %08x\n", ps->gen_pmcon_a, ps->gen_pmcon_b);
+
+	printk(BIOS_DEBUG, "GBLRST_CAUSE: %08x %08x\n", ps->gblrst_cause[0],
+	       ps->gblrst_cause[1]);
+}
+
+/*
+ * Set which power state system will be after reapplying
+ * the power (from G3 State)
+ */
+void pmc_soc_set_afterg3_en(const bool on)
+{
+	uint8_t reg8;
+	uint8_t *const pmcbase = pmc_mmio_regs();
+
+	reg8 = read8(pmcbase + GEN_PMCON_A);
+	if (on)
+		reg8 &= ~SLEEP_AFTER_POWER_FAIL;
+	else
+		reg8 |= SLEEP_AFTER_POWER_FAIL;
+	write8(pmcbase + GEN_PMCON_A, reg8);
+}
+
+void pmc_lock_smi(void)
+{
+	printk(BIOS_DEBUG, "Locking SMM enable.\n");
+	pmc_or_mmio32(GEN_PMCON_B, SMI_LOCK);
+}
+
+void pmc_lockdown_config(void)
+{
+	/* PMSYNC */
+	pmc_or_mmio32(PMSYNC_MISC_CFG, PMSYNC_LOCK);
+
+	/* Make sure payload/OS can't trigger global reset */
+	pmc_global_reset_disable_and_lock();
+
+	/* Lock PMC stretch policy */
+	pmc_or_mmio32(GEN_PMCON_B, SLP_STR_POL_LOCK);
+	pmc_or_mmio32(ST_PG_FDIS1, ST_FDIS_LK);
+	pmc_or_mmio32(PM_CFG, PMC_LOCK);
+}