diff --git a/arch/powerpc/include/asm/kexec_ranges.h b/arch/powerpc/include/asm/kexec_ranges.h
new file mode 100644
index 000000000000..78f3111e4e74
--- /dev/null
+++ b/arch/powerpc/include/asm/kexec_ranges.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _ASM_POWERPC_KEXEC_RANGES_H
+#define _ASM_POWERPC_KEXEC_RANGES_H
+
+#define MEM_RANGE_CHUNK_SZ		2048	/* Memory ranges size chunk */
+
+struct crash_mem *realloc_mem_ranges(struct crash_mem **mem_ranges);
+int add_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size);
+int add_tce_mem_ranges(struct crash_mem **mem_ranges);
+int add_initrd_mem_range(struct crash_mem **mem_ranges);
+#ifdef CONFIG_PPC_BOOK3S_64
+int add_htab_mem_range(struct crash_mem **mem_ranges);
+#else
+static inline int add_htab_mem_range(struct crash_mem **mem_ranges)
+{
+	return 0;
+}
+#endif
+int add_kernel_mem_range(struct crash_mem **mem_ranges);
+int add_rtas_mem_range(struct crash_mem **mem_ranges);
+int add_opal_mem_range(struct crash_mem **mem_ranges);
+int add_reserved_ranges(struct crash_mem **mem_ranges);
+void sort_memory_ranges(struct crash_mem *mrngs, bool merge);
+
+#endif /* _ASM_POWERPC_KEXEC_RANGES_H */
diff --git a/arch/powerpc/kexec/Makefile b/arch/powerpc/kexec/Makefile
index 67c355329457..4aff6846c772 100644
--- a/arch/powerpc/kexec/Makefile
+++ b/arch/powerpc/kexec/Makefile
@@ -7,7 +7,7 @@ obj-y				+= core.o crash.o core_$(BITS).o
 
 obj-$(CONFIG_PPC32)		+= relocate_32.o
 
-obj-$(CONFIG_KEXEC_FILE)	+= file_load.o file_load_$(BITS).o elf_$(BITS).o
+obj-$(CONFIG_KEXEC_FILE)	+= file_load.o ranges.o file_load_$(BITS).o elf_$(BITS).o
 
 ifdef CONFIG_HAVE_IMA_KEXEC
 ifdef CONFIG_IMA
diff --git a/arch/powerpc/kexec/ranges.c b/arch/powerpc/kexec/ranges.c
new file mode 100644
index 000000000000..21bea1b78443
--- /dev/null
+++ b/arch/powerpc/kexec/ranges.c
@@ -0,0 +1,417 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * powerpc code to implement the kexec_file_load syscall
+ *
+ * Copyright (C) 2004  Adam Litke (agl@us.ibm.com)
+ * Copyright (C) 2004  IBM Corp.
+ * Copyright (C) 2004,2005  Milton D Miller II, IBM Corporation
+ * Copyright (C) 2005  R Sharada (sharada@in.ibm.com)
+ * Copyright (C) 2006  Mohan Kumar M (mohan@in.ibm.com)
+ * Copyright (C) 2020  IBM Corporation
+ *
+ * Based on kexec-tools' kexec-ppc64.c, fs2dt.c.
+ * Heavily modified for the kernel by
+ * Hari Bathini <hbathini@linux.ibm.com>.
+ */
+
+#undef DEBUG
+#define pr_fmt(fmt) "kexec ranges: " fmt
+
+#include <linux/sort.h>
+#include <linux/kexec.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <asm/sections.h>
+#include <asm/kexec_ranges.h>
+
+/**
+ * get_max_nr_ranges - Get the max no. of ranges crash_mem structure
+ *                     could hold, given the size allocated for it.
+ * @size:              Allocation size of crash_mem structure.
+ *
+ * Returns the maximum no. of ranges.
+ */
+static inline unsigned int get_max_nr_ranges(size_t size)
+{
+	return ((size - sizeof(struct crash_mem)) /
+		sizeof(struct crash_mem_range));
+}
+
+/**
+ * get_mem_rngs_size - Get the allocated size of mrngs based on
+ *                     max_nr_ranges and chunk size.
+ * @mrngs:             Memory ranges.
+ *
+ * Returns the maximum size of @mrngs.
+ */
+static inline size_t get_mem_rngs_size(struct crash_mem *mrngs)
+{
+	size_t size;
+
+	if (!mrngs)
+		return 0;
+
+	size = (sizeof(struct crash_mem) +
+		(mrngs->max_nr_ranges * sizeof(struct crash_mem_range)));
+
+	/*
+	 * Memory is allocated in size multiple of MEM_RANGE_CHUNK_SZ.
+	 * So, align to get the actual length.
+	 */
+	return ALIGN(size, MEM_RANGE_CHUNK_SZ);
+}
+
+/**
+ * __add_mem_range - add a memory range to memory ranges list.
+ * @mem_ranges:      Range list to add the memory range to.
+ * @base:            Base address of the range to add.
+ * @size:            Size of the memory range to add.
+ *
+ * (Re)allocates memory, if needed.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+static int __add_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size)
+{
+	struct crash_mem *mrngs = *mem_ranges;
+
+	if ((mrngs == NULL) || (mrngs->nr_ranges == mrngs->max_nr_ranges)) {
+		mrngs = realloc_mem_ranges(mem_ranges);
+		if (!mrngs)
+			return -ENOMEM;
+	}
+
+	mrngs->ranges[mrngs->nr_ranges].start = base;
+	mrngs->ranges[mrngs->nr_ranges].end = base + size - 1;
+	pr_debug("Added memory range [%#016llx - %#016llx] at index %d\n",
+		 base, base + size - 1, mrngs->nr_ranges);
+	mrngs->nr_ranges++;
+	return 0;
+}
+
+/**
+ * __merge_memory_ranges - Merges the given memory ranges list.
+ * @mem_ranges:            Range list to merge.
+ *
+ * Assumes a sorted range list.
+ *
+ * Returns nothing.
+ */
+static void __merge_memory_ranges(struct crash_mem *mrngs)
+{
+	struct crash_mem_range *rngs;
+	int i, idx;
+
+	if (!mrngs)
+		return;
+
+	idx = 0;
+	rngs = &mrngs->ranges[0];
+	for (i = 1; i < mrngs->nr_ranges; i++) {
+		if (rngs[i].start <= (rngs[i-1].end + 1))
+			rngs[idx].end = rngs[i].end;
+		else {
+			idx++;
+			if (i == idx)
+				continue;
+
+			rngs[idx] = rngs[i];
+		}
+	}
+	mrngs->nr_ranges = idx + 1;
+}
+
+/**
+ * realloc_mem_ranges - reallocate mem_ranges with size incremented
+ *                      by MEM_RANGE_CHUNK_SZ. Frees up the old memory,
+ *                      if memory allocation fails.
+ * @mem_ranges:         Memory ranges to reallocate.
+ *
+ * Returns pointer to reallocated memory on success, NULL otherwise.
+ */
+struct crash_mem *realloc_mem_ranges(struct crash_mem **mem_ranges)
+{
+	struct crash_mem *mrngs = *mem_ranges;
+	unsigned int nr_ranges;
+	size_t size;
+
+	size = get_mem_rngs_size(mrngs);
+	nr_ranges = mrngs ? mrngs->nr_ranges : 0;
+
+	size += MEM_RANGE_CHUNK_SZ;
+	mrngs = krealloc(*mem_ranges, size, GFP_KERNEL);
+	if (!mrngs) {
+		kfree(*mem_ranges);
+		*mem_ranges = NULL;
+		return NULL;
+	}
+
+	mrngs->nr_ranges = nr_ranges;
+	mrngs->max_nr_ranges = get_max_nr_ranges(size);
+	*mem_ranges = mrngs;
+
+	return mrngs;
+}
+
+/**
+ * add_mem_range - Updates existing memory range, if there is an overlap.
+ *                 Else, adds a new memory range.
+ * @mem_ranges:    Range list to add the memory range to.
+ * @base:          Base address of the range to add.
+ * @size:          Size of the memory range to add.
+ *
+ * (Re)allocates memory, if needed.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int add_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size)
+{
+	struct crash_mem *mrngs = *mem_ranges;
+	u64 mstart, mend, end;
+	unsigned int i;
+
+	if (!size)
+		return 0;
+
+	end = base + size - 1;
+
+	if ((mrngs == NULL) || (mrngs->nr_ranges == 0))
+		return __add_mem_range(mem_ranges, base, size);
+
+	for (i = 0; i < mrngs->nr_ranges; i++) {
+		mstart = mrngs->ranges[i].start;
+		mend = mrngs->ranges[i].end;
+		if (base < mend && end > mstart) {
+			if (base < mstart)
+				mrngs->ranges[i].start = base;
+			if (end > mend)
+				mrngs->ranges[i].end = end;
+			return 0;
+		}
+	}
+
+	return __add_mem_range(mem_ranges, base, size);
+}
+
+/**
+ * add_tce_mem_ranges - Adds tce-table range to the given memory ranges list.
+ * @mem_ranges:         Range list to add the memory range(s) to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int add_tce_mem_ranges(struct crash_mem **mem_ranges)
+{
+	struct device_node *dn;
+	int ret = 0;
+
+	for_each_node_by_type(dn, "pci") {
+		u64 base;
+		u32 size;
+		int rc;
+
+		/*
+		 * It is ok to have pci nodes without tce. So, ignore
+		 * any read errors here.
+		 */
+		rc = of_property_read_u64(dn, "linux,tce-base", &base);
+		rc |= of_property_read_u32(dn, "linux,tce-size", &size);
+		if (rc)
+			continue;
+
+		ret = add_mem_range(mem_ranges, base, size);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+/**
+ * add_initrd_mem_range - Adds initrd range to the given memory ranges list,
+ *                        if the initrd was retained.
+ * @mem_ranges:           Range list to add the memory range to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int add_initrd_mem_range(struct crash_mem **mem_ranges)
+{
+	u64 base, end;
+	char *str;
+	int ret;
+
+	/* This range means something only if initrd was retained */
+	str = strstr(saved_command_line, "retain_initrd");
+	if (!str)
+		return 0;
+
+	ret = of_property_read_u64(of_chosen, "linux,initrd-start", &base);
+	ret |= of_property_read_u64(of_chosen, "linux,initrd-end", &end);
+	if (!ret)
+		ret = add_mem_range(mem_ranges, base, end - base + 1);
+	return ret;
+}
+
+#ifdef CONFIG_PPC_BOOK3S_64
+/**
+ * add_htab_mem_range - Adds htab range to the given memory ranges list,
+ *                      if it exists
+ * @mem_ranges:         Range list to add the memory range to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int add_htab_mem_range(struct crash_mem **mem_ranges)
+{
+	if (!htab_address)
+		return 0;
+
+	return add_mem_range(mem_ranges, __pa(htab_address), htab_size_bytes);
+}
+#endif
+
+/**
+ * add_kernel_mem_range - Adds kernel text region to the given
+ *                        memory ranges list.
+ * @mem_ranges:           Range list to add the memory range to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int add_kernel_mem_range(struct crash_mem **mem_ranges)
+{
+	return add_mem_range(mem_ranges, 0, __pa(_end));
+}
+
+/**
+ * add_rtas_mem_range - Adds RTAS region to the given memory ranges list.
+ * @mem_ranges:         Range list to add the memory range to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int add_rtas_mem_range(struct crash_mem **mem_ranges)
+{
+	struct device_node *dn;
+	int ret = 0;
+
+	dn = of_find_node_by_path("/rtas");
+	if (dn) {
+		u32 base, size;
+
+		ret = of_property_read_u32(dn, "linux,rtas-base", &base);
+		ret |= of_property_read_u32(dn, "rtas-size", &size);
+		if (ret)
+			goto out;
+
+		ret = add_mem_range(mem_ranges, base, size);
+	}
+
+out:
+	of_node_put(dn);
+	return ret;
+}
+
+/**
+ * add_opal_mem_range - Adds OPAL region to the given memory ranges list.
+ * @mem_ranges:         Range list to add the memory range to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int add_opal_mem_range(struct crash_mem **mem_ranges)
+{
+	struct device_node *dn;
+	int ret = 0;
+
+	dn = of_find_node_by_path("/ibm,opal");
+	if (dn) {
+		u64 base, size;
+
+		ret = of_property_read_u64(dn, "opal-base-address", &base);
+		ret |= of_property_read_u64(dn, "opal-runtime-size", &size);
+		if (ret)
+			goto out;
+
+		ret = add_mem_range(mem_ranges, base, size);
+	}
+
+out:
+	of_node_put(dn);
+	return ret;
+}
+
+/**
+ * add_reserved_ranges - Adds "/reserved-ranges" regions exported by f/w
+ *                       to the given memory ranges list.
+ * @mem_ranges:          Range list to add the memory ranges to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int add_reserved_ranges(struct crash_mem **mem_ranges)
+{
+	int n_mem_addr_cells, n_mem_size_cells, i, len, cells, ret = 0;
+	const __be32 *prop;
+
+	prop = of_get_property(of_root, "reserved-ranges", &len);
+	if (!prop)
+		return 0;
+
+	of_node_get(of_root);
+	n_mem_addr_cells = of_n_addr_cells(of_root);
+	n_mem_size_cells = of_n_size_cells(of_root);
+	cells = n_mem_addr_cells + n_mem_size_cells;
+
+	/* Each reserved range is an (address,size) pair */
+	for (i = 0; i < (len / (sizeof(*prop) * cells)); i++) {
+		u64 base, size;
+
+		base = of_read_number(prop + (i * cells), n_mem_addr_cells);
+		size = of_read_number(prop + (i * cells) + n_mem_addr_cells,
+				      n_mem_size_cells);
+
+		ret = add_mem_range(mem_ranges, base, size);
+		if (ret)
+			break;
+	}
+
+	of_node_put(of_root);
+	return ret;
+}
+
+/* cmp_func_t callback to sort ranges with sort() */
+static int rngcmp(const void *_x, const void *_y)
+{
+	const struct crash_mem_range *x = _x, *y = _y;
+
+	if (x->start > y->start)
+		return 1;
+	if (x->start < y->start)
+		return -1;
+	return 0;
+}
+
+/**
+ * sort_memory_ranges - Sorts the given memory ranges list.
+ * @mem_ranges:         Range list to sort.
+ * @merge:              If true, merge the list after sorting.
+ *
+ * Returns nothing.
+ */
+void sort_memory_ranges(struct crash_mem *mrngs, bool merge)
+{
+	int i;
+
+	if (!mrngs)
+		return;
+
+	/* Sort the ranges in-place */
+	sort(&(mrngs->ranges[0]), mrngs->nr_ranges, sizeof(mrngs->ranges[0]),
+	     rngcmp, NULL);
+
+	if (merge)
+		__merge_memory_ranges(mrngs);
+
+	/* For debugging purpose */
+	pr_debug("Memory ranges:\n");
+	for (i = 0; i < mrngs->nr_ranges; i++) {
+		pr_debug("\t[%03d][%#016llx - %#016llx]\n", i,
+			 mrngs->ranges[i].start,
+			 mrngs->ranges[i].end);
+	}
+}
