diff --git a/core/flash.c b/core/flash.c
index 793401c94615..e5f8452a17c7 100644
--- a/core/flash.c
+++ b/core/flash.c
@@ -421,6 +421,7 @@ static struct {
 	{ RESOURCE_ID_KERNEL,	RESOURCE_SUBID_NONE,		"BOOTKERNEL" },
 	{ RESOURCE_ID_INITRAMFS,RESOURCE_SUBID_NONE,		"ROOTFS" },
 	{ RESOURCE_ID_CAPP,	RESOURCE_SUBID_SUPPORTED,	"CAPP" },
+	{ RESOURCE_ID_CATALOG,  RESOURCE_SUBID_SUPPORTED,	"IMA_CATALOG" },
 };
 
 
diff --git a/core/init.c b/core/init.c
index 568addee3867..5120f123c020 100644
--- a/core/init.c
+++ b/core/init.c
@@ -47,6 +47,7 @@
 #include <nvram.h>
 #include <libstb/stb.h>
 #include <libstb/container.h>
+#include <imc.h>
 
 enum proc_gen proc_gen;
 unsigned int pcie_max_link_speed;
@@ -930,6 +931,9 @@ void __noreturn __nomcount main_cpu_entry(const void *fdt)
 	/* Init SLW related stuff, including fastsleep */
 	slw_init();
 
+	/* Init In-Memory Collection related stuff (load the IMC dtb into memory) */
+	imc_init();
+
 	op_display(OP_LOG, OP_MOD_INIT, 0x0002);
 
 	pci_nvram_init();
diff --git a/hw/Makefile.inc b/hw/Makefile.inc
index b0a8b7c32d29..01642611de94 100644
--- a/hw/Makefile.inc
+++ b/hw/Makefile.inc
@@ -1,7 +1,7 @@
 # -*-Makefile-*-
 SUBDIRS += hw
 HW_OBJS  = xscom.o chiptod.o gx.o cec.o lpc.o lpc-uart.o psi.o
-HW_OBJS += homer.o slw.o occ.o fsi-master.o centaur.o
+HW_OBJS += homer.o slw.o occ.o fsi-master.o centaur.o imc.o
 HW_OBJS += nx.o nx-rng.o nx-crypto.o nx-842.o
 HW_OBJS += p7ioc.o p7ioc-inits.o p7ioc-phb.o
 HW_OBJS += phb3.o sfc-ctrl.o fake-rtc.o bt.o p8-i2c.o prd.o
diff --git a/hw/imc.c b/hw/imc.c
new file mode 100644
index 000000000000..76b9659b752d
--- /dev/null
+++ b/hw/imc.c
@@ -0,0 +1,257 @@
+/* Copyright 2016 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <skiboot.h>
+#include <xscom.h>
+#include <imc.h>
+#include <chip.h>
+#include <libxz/xz.h>
+
+/*
+ * Nest IMC PMU names along with their bit values as represented in the
+ * imc_chip_avl_vector(in struct imc_chip_cb, look at include/imc.h).
+ * nest_pmus[] is an array containing all the possible nest IMC PMU node names.
+ */
+char const *nest_pmus[] = {
+	"powerbus0",
+	"mcs0",
+	"mcs1",
+	"mcs2",
+	"mcs3",
+	"mcs4",
+	"mcs5",
+	"mcs6",
+	"mcs7",
+	"mba0",
+	"mba1",
+	"mba2",
+	"mba3",
+	"mba4",
+	"mba5",
+	"mba6",
+	"mba7",
+	"cen0",
+	"cen1",
+	"cen2",
+	"cen3",
+	"cen4",
+	"cen5",
+	"cen6",
+	"cen7",
+	"xlink0",
+	"xlink1",
+	"xlink2",
+	"mcd0",
+	"mcd1",
+	"phb0",
+	"phb1",
+	"phb2",
+	"resvd",
+	"nx",
+	"capp0",
+	"capp1",
+	"vas",
+	"int",
+	"alink0",
+	"alink1",
+	"alink2",
+	"nvlink0",
+	"nvlink1",
+	"nvlink2",
+	"nvlink3",
+	"nvlink4",
+	"nvlink5",
+	/* reserved bits : 48 - 64 */
+};
+
+
+static struct imc_chip_cb *get_imc_cb(void)
+{
+	uint64_t cb_loc;
+	struct proc_chip *chip = get_chip(this_cpu()->chip_id);
+
+	cb_loc = chip->homer_base + P9_CB_STRUCT_OFFSET;
+	return (struct imc_chip_cb *)cb_loc;
+}
+
+/*
+ * Decompresses the blob obtained from the IMA_CATALOG sub-partition
+ * in "buf" of size "size", assigns the uncompressed device tree
+ * binary to "fdt" and returns.
+ * Returns 0 on success and -1 on error.
+ */
+static int decompress_subpartition(char *buf, size_t size, void **fdt)
+{
+	struct xz_dec *s;
+	struct xz_buf b;
+	void *data;
+	int ret = 0;
+
+	/* Initialize the xz library first */
+	xz_crc32_init();
+	s = xz_dec_init(XZ_SINGLE, 0);
+	if (s == NULL)
+	{
+		prerror("IMC: initialization error for xz\n");
+		return -1;
+	}
+
+	/* Allocate memory for the uncompressed data */
+	data = malloc(IMC_DTB_SIZE);
+	if (!data) {
+		prerror("IMC: memory allocation error\n");
+		ret = -1;
+		goto err;
+	}
+
+	/*
+	 * Source address : buf
+	 * Source size : size
+	 * Destination address : data
+	 * Destination size : IMC_DTB_SIZE
+	 */
+	b.in = buf;
+	b.in_pos = 0;
+	b.in_size = size;
+	b.out = data;
+	b.out_pos = 0;
+	b.out_size = IMC_DTB_SIZE;
+
+	/* Start decompressing */
+	ret = xz_dec_run(s, &b);
+	if (ret != XZ_STREAM_END) {
+		prerror("IMC: failed to decompress subpartition\n");
+		free(data);
+		ret = -1;
+	}
+	*fdt = data;
+
+err:
+	/* Clean up memory */
+	xz_dec_end(s);
+	return ret;
+}
+
+/*
+ * Remove the PMU device nodes from the ncoming new subtree, if they are not
+ * available in the hardware. The availability is described by the
+ * control block's imc_chip_avl_vector.
+ * Each bit represents a device unit. If the device is available, then
+ * the bit is set else its unset.
+ */
+static int disable_unavailable_units(struct dt_node *dev)
+{
+	uint64_t avl_vec;
+	struct imc_chip_cb *cb;
+	struct dt_node *target;
+	int i;
+
+	/* Fetch the IMC control block structure */
+	cb = get_imc_cb();
+
+	avl_vec = be64_to_cpu(cb->imc_chip_avl_vector);
+	for (i = 0; i < MAX_AVL; i++) {
+		if (!(PPC_BITMASK(i, i) & avl_vec)) {
+			/* Check if the device node exists */
+			target = dt_find_by_name(dev, nest_pmus[i]);
+			if (!target)
+				continue;
+			/* Remove the device node */
+			dt_free(target);
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Fetch the IMA_CATALOG partition and find the appropriate sub-partition
+ * based on the platform's PVR.
+ * Decompress the sub-partition and link the imc device tree to the
+ * existing device tree.
+ */
+void imc_init(void)
+{
+	char *buf = NULL;
+	size_t size = IMC_DTB_SIZE;
+	uint32_t pvr = mfspr(SPR_PVR);
+	int ret;
+	struct dt_node *dev;
+	void *fdt = NULL;
+	struct dt_fixup_p parent;
+
+	/* Enable only for power 9 */
+	if (proc_gen != proc_gen_p9)
+		return;
+
+	buf = malloc(IMC_DTB_SIZE);
+	if (!buf) {
+		prerror("IMC: Memory allocation Failed\n");
+		return;
+	}
+
+	ret = start_preload_resource(RESOURCE_ID_CATALOG,
+					pvr, buf, &size);
+	if (ret != OPAL_SUCCESS)
+		goto err;
+
+	ret = wait_for_resource_loaded(RESOURCE_ID_CATALOG,
+					  pvr);
+	if (ret != OPAL_SUCCESS) {
+		prerror("IMC Catalog load failed\n");
+		return;
+	}
+
+	/* Decompress the subpartition now */
+	ret = decompress_subpartition(buf, size, &fdt);
+	if (ret < 0)
+		goto err;
+
+	/* Create a device tree entry for imc counters */
+	dev = dt_new_root("imc-counters");
+	if (!dev)
+		goto err;
+
+	/* Attach the new fdt to the imc-counters node */
+	ret = dt_expand_node(dev, fdt, 0);
+	if (ret < 0) {
+		dt_free(dev);
+		goto err;
+	}
+
+	ret = dt_fixup_populate_llist(dev, &parent, "events");
+	if (ret < 0) {
+		dt_free(dev);
+		goto err;
+	}
+
+	/* Fixup the phandle for the IMC device tree */
+	dt_fixup_phandle(dev, &parent);
+	dt_fixup_list_free(&parent);
+
+	/* Check availability of the Nest PMU units from the availability vector */
+	disable_unavailable_units(dev);
+
+	if (!dt_attach_root(dt_root, dev)) {
+		dt_free(dev);
+		goto err;
+	}
+
+	return;
+err:
+	prerror("IMC Devices not added\n");
+	free(buf);
+}
diff --git a/include/imc.h b/include/imc.h
index 3e3205431981..17db0193b4ed 100644
--- a/include/imc.h
+++ b/include/imc.h
@@ -115,4 +115,5 @@ struct imc_chip_cb
 
 #define MAX_AVL		48
 
+void imc_init(void);
 #endif /* __IMC_H */
diff --git a/include/platform.h b/include/platform.h
index 9133204207d6..246daf285e75 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -27,6 +27,7 @@ enum resource_id {
 	RESOURCE_ID_KERNEL,
 	RESOURCE_ID_INITRAMFS,
 	RESOURCE_ID_CAPP,
+	RESOURCE_ID_CATALOG,
 };
 #define RESOURCE_SUBID_NONE 0
 #define RESOURCE_SUBID_SUPPORTED 1
