diff --git a/src/soc/intel/meteorlake/include/soc/systemagent.h b/src/soc/intel/meteorlake/include/soc/systemagent.h
index 8d029f3..d463ce1 100644
--- a/src/soc/intel/meteorlake/include/soc/systemagent.h
+++ b/src/soc/intel/meteorlake/include/soc/systemagent.h
@@ -42,4 +42,28 @@
 #define V_P2SB_CFG_HBDF_DEV	30
 #define V_P2SB_CFG_HBDF_FUNC	6
 
+#define CRAB_ABORT_BASE_ADDR	0xFEB00000
+#define CRAB_ABORT_SIZE		(512 * KiB)
+#define TPM_BASE_ADDRESS	0xFED40000
+#define TPM_SIZE		(64 * KiB)
+#define LT_SECURITY_BASE_ADDR	0xFED20000
+#define LT_SECURITY_SIZE	(384 * KiB)
+#define APIC_SIZE		(1 * MiB)
+
+#define MASK_PCIEXBAR_LENGTH	0x0000000E // bits [3:1]
+#define PCIEXBAR_LENGTH_LSB	1 // used to shift right
+
+#define DSM_BASE_ADDR_REG	0xB0
+#define  MASK_DSM_LENGTH	0xFF00 // [15:8]
+#define  MASK_DSM_LENGTH_LSB	8 // used to shift right
+#define  MASK_GSM_LENGTH	0xC0 // [7:6]
+#define  MASK_GSM_LENGTH_LSB	6 // used to shift right
+#define DPR_REG			0x5C
+#define  MASK_DPR_LENGTH	0xFF0 // [11:4]
+#define  MASK_DPR_LENGTH_LSB	4 // used to shift right
+
+uint64_t get_mmcfg_size(const struct device *dev);
+uint64_t get_dsm_size(const struct device *dev);
+uint64_t get_gsm_size(const struct device *dev);
+uint64_t get_dpr_size(const struct device *dev);
 #endif
diff --git a/src/soc/intel/meteorlake/systemagent.c b/src/soc/intel/meteorlake/systemagent.c
index d8fc0a4..81e4bed 100644
--- a/src/soc/intel/meteorlake/systemagent.c
+++ b/src/soc/intel/meteorlake/systemagent.c
@@ -1,10 +1,14 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <arch/ioapic.h>
 #include <console/console.h>
+#include <cpu/x86/msr.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
 #include <delay.h>
+#include <intelblocks/cpulib.h>
+#include <intelblocks/msr.h>
 #include <intelblocks/power_limit.h>
 #include <intelblocks/systemagent.h>
 #include <soc/iomap.h>
@@ -20,12 +24,22 @@
 void soc_add_fixed_mmio_resources(struct device *dev, int *index)
 {
 	static const struct sa_mmio_descriptor soc_fixed_resources[] = {
-		{ PCIEXBAR, CONFIG_ECAM_MMCONF_BASE_ADDRESS, CONFIG_ECAM_MMCONF_LENGTH,
-				"PCIEXBAR" },
+		{ MCHBAR, MCH_BASE_ADDRESS, MCH_BASE_SIZE, "MCHBAR" },
 		{ DMIBAR, DMI_BASE_ADDRESS, DMI_BASE_SIZE, "DMIBAR" },
 		{ EPBAR, EP_BASE_ADDRESS, EP_BASE_SIZE, "EPBAR" },
 		{ REGBAR, REG_BASE_ADDRESS, REG_BASE_SIZE, "REGBAR" },
 		{ EDRAMBAR, EDRAM_BASE_ADDRESS, EDRAM_BASE_SIZE, "EDRAMBAR" },
+
+		/* first field (sa_mmio_descriptor.index) is not used, setting to 0: */
+		{ 0, CRAB_ABORT_BASE_ADDR, CRAB_ABORT_SIZE, "CRAB_ABORT" },
+		{ 0, LT_SECURITY_BASE_ADDR, LT_SECURITY_SIZE, "LT_SECURITY" },
+		{ 0, IO_APIC_ADDR, APIC_SIZE, "APIC" },
+		// PCH_PRESERVERD covers:
+		// TraceHub SW BAR, PMC MBAR, SPI BAR0, SerialIo BAR in ACPI mode
+		// eSPI LGMR BAR, eSPI2 SEGMR BAR, TraceHub MTB BAR, TraceHub FW BAR
+		// IOE PMC BAR, Tracehub RTIT BAR (SOC), HECI{1,2,3} BAR0
+		// see fsp/ClientOneSiliconPkg/Fru/MtlSoc/Include/PchReservedResources.h
+		{ 0, PCH_PRESERVED_BASE_ADDRESS, PCH_PRESERVED_BASE_SIZE, "PCH_RESERVED" },
 	};
 
 	sa_add_fixed_mmio_resources(dev, index, soc_fixed_resources,
@@ -40,6 +54,98 @@
 }
 
 /*
+ * set MMIO resource's fields
+ */
+static void set_mmio_resource(
+	struct sa_mmio_descriptor *resource,
+	uint64_t base,
+	uint64_t size,
+	const char *description)
+{
+	if (resource == NULL) {
+		printk(BIOS_ERR, "%s: argument resource is NULL for %s\n",
+		__func__, description);
+		return;
+	}
+	resource->base = base;
+	resource->size = size;
+	resource->description = description;
+}
+
+int soc_get_uncore_prmmr_base_and_mask(uint64_t *prmrr_base,
+	uint64_t *prmrr_mask)
+{
+	msr_t msr;
+	msr = rdmsr(MSR_PRMRR_BASE_0);
+	*prmrr_base = (uint64_t)msr.hi << 32 | msr.lo;
+	msr = rdmsr(MSR_PRMRR_PHYS_MASK);
+	*prmrr_mask = (uint64_t)msr.hi << 32 | msr.lo;
+	return 0;
+}
+
+/*
+ * SoC implementation
+ *
+ * Add all known configurable memory ranges for Host Controller/Memory
+ * controller.
+ */
+void soc_add_configurable_mmio_resources(struct device *dev, int *resource_cnt)
+{
+	uint64_t size, base, tseg_base;
+	int count = 0;
+	struct sa_mmio_descriptor cfg_rsrc[6]; /* Increase size when adding more resources */
+
+	/* MMCONF */
+	size = get_mmcfg_size(dev);
+	if (size > 0)
+		set_mmio_resource(&(cfg_rsrc[count++]), CONFIG_ECAM_MMCONF_BASE_ADDRESS,
+			size, "MMCONF");
+
+	/* DSM */
+	size = get_dsm_size(dev);
+	if (size > 0) {
+		base = pci_read_config32(dev, DSM_BASE_ADDR_REG) & 0xFFF00000;
+		set_mmio_resource(&(cfg_rsrc[count++]), base, size, "DSM");
+	}
+
+	/* TSEG */
+	size = sa_get_tseg_size();
+	tseg_base = sa_get_tseg_base();
+	if (size > 0)
+		set_mmio_resource(&(cfg_rsrc[count++]), tseg_base, size, "TSEG");
+
+	/* PMRR */
+	size = get_valid_prmrr_size();
+	if (size > 0) {
+		uint64_t mask;
+		if (soc_get_uncore_prmmr_base_and_mask(&base, &mask) == 0) {
+			base &= mask;
+			set_mmio_resource(&(cfg_rsrc[count++]), base, size, "PMRR");
+		} else {
+			printk(BIOS_ERR, "SA: Failed to get PRMRR base and mask\n");
+		}
+	}
+
+	/* GSM */
+	size = get_gsm_size(dev);
+	if (size > 0) {
+		base = sa_get_gsm_base();
+		set_mmio_resource(&(cfg_rsrc[count++]), base, size, "GSM");
+	}
+
+	/* DPR */
+	size = get_dpr_size(dev);
+	if (size > 0) {
+		/* DPR just below TSEG: */
+		base = tseg_base - size;
+		set_mmio_resource(&(cfg_rsrc[count++]), base, size, "DPR");
+	}
+
+	/* Add all the above */
+	sa_add_fixed_mmio_resources(dev, resource_cnt, cfg_rsrc, count);
+}
+
+/*
  * SoC implementation
  *
  * Perform System Agent Initialization during Ramstage phase.
@@ -100,3 +206,116 @@
 		return 65536;
 	}
 }
+
+uint64_t get_mmcfg_size(const struct device *dev)
+{
+	uint32_t pciexbar_reg;
+	uint64_t mmcfg_length;
+
+	if (!dev) {
+		printk(BIOS_DEBUG, "%s : device is null\n", __func__);
+		return 0;
+	}
+
+	pciexbar_reg = pci_read_config32(dev, PCIEXBAR);
+
+	if (!(pciexbar_reg & (1 << 0))) {
+		printk(BIOS_DEBUG, "%s : PCIEXBAR disabled\n", __func__);
+		return 0;
+	}
+
+	switch ((pciexbar_reg & MASK_PCIEXBAR_LENGTH) >> PCIEXBAR_LENGTH_LSB) {
+	case PCIEXBAR_LENGTH_4096MB:
+		mmcfg_length = 4 * ((uint64_t)GiB);
+		break;
+	case PCIEXBAR_LENGTH_2048MB:
+		mmcfg_length = 2 * ((uint64_t)GiB);
+		break;
+	case PCIEXBAR_LENGTH_1024MB:
+		mmcfg_length = 1 * GiB;
+		break;
+	case PCIEXBAR_LENGTH_512MB:
+		mmcfg_length = 512 * MiB;
+		break;
+	case PCIEXBAR_LENGTH_256MB:
+		mmcfg_length = 256 * MiB;
+		break;
+	case PCIEXBAR_LENGTH_128MB:
+		mmcfg_length = 128 * MiB;
+		break;
+	case PCIEXBAR_LENGTH_64MB:
+		mmcfg_length = 64 * MiB;
+		break;
+	default:
+		printk(BIOS_DEBUG, "%s : PCIEXBAR - invalid length (0x%x)\n", __func__,
+			pciexbar_reg & MASK_PCIEXBAR_LENGTH);
+		mmcfg_length = 0x0;
+		break;
+	}
+
+	return mmcfg_length;
+}
+
+uint64_t get_dsm_size(const struct device *dev)
+{
+	// - size : B0/D0/F0:R 50h [15:8]
+	uint32_t reg32 = pci_read_config32(dev, GGC);
+	uint64_t size;
+	uint32_t size_field = (reg32 & MASK_DSM_LENGTH) >> MASK_DSM_LENGTH_LSB;
+	if (size_field <= 0x10) { // 0x0 - 0x10
+		size = size_field * 32 * MiB;
+	} else if ((size_field >= 0xF0) && (size_field >= 0xFE)) {
+		size = ((uint64_t)size_field - 0xEF) * 4 * MiB;
+	} else {
+		switch (size_field) {
+		case 0x20:
+			size = 1 * GiB;
+			break;
+		case 0x30:
+			size = 1536 * MiB;
+			break;
+		case 0x40:
+			size = 2 * (uint64_t)GiB;
+			break;
+		default:
+			printk(BIOS_DEBUG, "%s : DSM - invalid length (0x%x)\n",
+				__func__, size_field);
+			size = 0x0;
+			break;
+		}
+	}
+	return size;
+}
+
+uint64_t get_gsm_size(const struct device *dev)
+{
+	const u32 gsm_size = pci_read_config32(dev, GGC);
+	uint64_t size;
+	uint32_t size_field = (gsm_size & MASK_GSM_LENGTH) >> MASK_GSM_LENGTH_LSB;
+	switch (size_field) {
+	case 0x0:
+		size = 0;
+		break;
+	case 0x1:
+		size = 2 * MiB;
+		break;
+	case 0x2:
+		size = 4 * MiB;
+		break;
+	case 0x3:
+		size = 8 * MiB;
+		break;
+	default:
+		size = 0;
+		break;
+	}
+	return size;
+}
+uint64_t get_dpr_size(const struct device *dev)
+{
+	uint64_t size;
+	uint32_t dpr_reg = pci_read_config32(dev, DPR_REG);
+	uint32_t size_field = (dpr_reg & MASK_DPR_LENGTH) >> MASK_DPR_LENGTH_LSB;
+	size = (uint64_t)size_field * MiB;
+	return size;
+}