diff -Naru ./makedumpfile-1.7.0/arch/sw_64.c ./makedumpfile-1.7.0-sw/arch/sw_64.c
--- ./makedumpfile-1.7.0/arch/sw_64.c	1970-01-01 00:00:00.000000000 +0000
+++ ./makedumpfile-1.7.0-sw/arch/sw_64.c	2022-08-19 06:54:24.938438551 +0000
@@ -0,0 +1,126 @@
+/*
+ * sw_64.c
+ *
+ * Copyright (C) 2021 Loongson Technology Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation (version 2 of the License).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#ifdef __sw_64__
+
+#include "../print_info.h"
+#include "../elf_info.h"
+#include "../makedumpfile.h"
+
+int
+get_phys_base_sw_64(void)
+{
+	info->phys_base = 0ULL;
+
+	DEBUG_MSG("phys_base    : %lx\n", info->phys_base);
+
+	return TRUE;
+}
+
+int
+get_machdep_info_sw_64(void)
+{
+	info->section_size_bits = _SECTION_SIZE_BITS;
+
+	/* Check if we can get MAX_PHYSMEM_BITS from vmcoreinfo */
+	if (NUMBER(MAX_PHYSMEM_BITS) != NOT_FOUND_NUMBER)
+		info->max_physmem_bits = NUMBER(MAX_PHYSMEM_BITS);
+	else
+		info->max_physmem_bits  = _MAX_PHYSMEM_BITS;
+
+	DEBUG_MSG("max_physmem_bits : %lx\n", info->max_physmem_bits);
+	DEBUG_MSG("section_size_bits: %lx\n", info->section_size_bits);
+
+	return TRUE;
+}
+
+int
+get_versiondep_info_sw_64(void)
+{
+	info->page_offset  = 0x9800000000000000ULL;
+
+	DEBUG_MSG("page_offset : %lx\n", info->page_offset);
+
+	return TRUE;
+}
+
+/*
+ * Translate a virtual address to a physical address by using 3 levels paging.
+ */
+unsigned long long
+vaddr_to_paddr_sw_64(unsigned long vaddr)
+{
+	unsigned long long paddr = NOT_PADDR;
+	pgd_t	*pgda, pgdv;
+	pmd_t	*pmda, pmdv;
+	pte_t 	*ptea, ptev;
+
+	/*
+	 * CKSEG0/CKSEG1
+	 */
+	if (vaddr >= 0xffffffff80000000ULL && vaddr < 0xffffffffc0000000ULL)
+		return vaddr & 0x1fffffffULL;
+
+	/*
+	 * XKPHYS
+	 */
+	if (vaddr >= 0x9000000000000000ULL && vaddr < 0xc000000000000000ULL)
+		return vaddr & ((1ULL << MAX_PHYSMEM_BITS()) - 1);
+
+	if (SYMBOL(swapper_pg_dir) == NOT_FOUND_SYMBOL) {
+		ERRMSG("Can't get the symbol of swapper_pg_dir.\n");
+		return NOT_PADDR;
+	}
+
+	pgda = pgd_offset(SYMBOL(swapper_pg_dir), vaddr);
+	if (!readmem(PADDR, (unsigned long long)pgda, &pgdv, sizeof(pgdv))) {
+		ERRMSG("Can't read pgd\n");
+		return NOT_PADDR;
+	}
+
+	pmda = pmd_offset(&pgdv, vaddr);
+	if (!readmem(PADDR, (unsigned long long)pmda, &pmdv, sizeof(pmdv))) {
+		ERRMSG("Can't read pmd\n");
+		return NOT_PADDR;
+	}
+
+	switch (pmdv & (_PAGE_PRESENT|_PAGE_HUGE)) {
+	case _PAGE_PRESENT:
+		ptea = pte_offset(&pmdv, vaddr);
+		/* 64k page */
+		if (!readmem(PADDR, (unsigned long long)ptea, &ptev, sizeof(ptev))) {
+			ERRMSG("Can't read pte\n");
+			return NOT_PADDR;
+		}
+
+		if (!(ptev & _PAGE_PRESENT)) {
+			ERRMSG("Can't get a valid pte.\n");
+			return NOT_PADDR;
+		} else {
+			paddr = PAGEBASE(ptev) + (vaddr & (PAGESIZE() - 1));
+		}
+		break;
+	case _PAGE_PRESENT|_PAGE_HUGE:
+		paddr = (pmdv & PMD_MASK) + (vaddr & (PMD_SIZE - 1));
+		break;
+	}
+
+	return paddr;
+}
+
+#endif /* sw_64 */
diff -Naru ./makedumpfile-1.7.0/makedumpfile.h ./makedumpfile-1.7.0-sw/makedumpfile.h
--- ./makedumpfile-1.7.0/makedumpfile.h	2021-11-08 00:36:15.000000000 +0000
+++ ./makedumpfile-1.7.0-sw/makedumpfile.h	2022-08-19 07:46:43.093698825 +0000
@@ -963,7 +963,7 @@
 
 #endif          /* sparc64 */
 
-#ifdef __mips64__ /* mips64 */
+#ifdef __mips64__   /* mips64 */
 #define KVBASE			PAGE_OFFSET
 #define _SECTION_SIZE_BITS	(28)
 #define _MAX_PHYSMEM_BITS	(48)
@@ -996,6 +996,40 @@
 
 #endif		/* mips64 */
 
+#ifdef __sw_64__   /* sw_64 */
+#define KVBASE                  PAGE_OFFSET
+#define _SECTION_SIZE_BITS      (28)
+#define _MAX_PHYSMEM_BITS       (48)
+#define _PAGE_PRESENT           (1 << 0)
+#define _PAGE_HUGE              (1 << 4)
+
+typedef unsigned long pte_t;
+typedef unsigned long pmd_t;
+typedef unsigned long pgd_t;
+
+#define PAGE_MASK               (~(PAGESIZE() - 1))
+#define PMD_MASK                (~(PMD_SIZE - 1))
+#define PMD_SHIFT               ((PAGESHIFT() - 3) * 2 + 3)
+#define PMD_SIZE                (1UL << PMD_SHIFT)
+#define PGDIR_SHIFT             ((PAGESHIFT() - 3) * 3 + 3)
+#define PTRS_PER_PTE            (1 << (PAGESHIFT() - 3))
+#define PTRS_PER_PMD            PTRS_PER_PTE
+#define PTRS_PER_PGD            PTRS_PER_PTE
+
+#define pte_index(vaddr)                (((vaddr) >> PAGESHIFT()) & (PTRS_PER_PTE - 1))
+#define pmd_page_paddr(pmd)             (pmd & (int32_t)PAGE_MASK)
+#define pte_offset(dir, vaddr)          ((pte_t *)pmd_page_paddr((*dir)) + pte_index(vaddr))
+
+#define pmd_index(vaddr)                (((vaddr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
+#define pgd_page_paddr(pgd)             (pgd & (int32_t)PAGE_MASK)
+#define pmd_offset(pgd, vaddr)          ((pmd_t *)pgd_page_paddr((*pgd)) + pmd_index(vaddr))
+
+#define pgd_index(vaddr)                (((vaddr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
+#define pgd_offset(pgdir, vaddr)        ((pgd_t *)(pgdir) + pgd_index(vaddr))
+
+#endif          /* sw_64 */
+
+
 /*
  * The function of dependence on machine
  */
@@ -1167,6 +1201,23 @@
 #define arch_crashkernel_mem_size()	stub_false()
 #endif		/* mips64 */
 
+#ifdef __sw_64__ /* sw64 */
+int get_phys_base_sw_64(void);
+int get_machdep_info_sw_64(void);
+int get_versiondep_info_sw_64(void);
+unsigned long long vaddr_to_paddr_sw_64(unsigned long vaddr);
+#define find_vmemmap()          stub_false()
+#define get_phys_base()         get_phys_base_sw_64()
+#define get_machdep_info()      get_machdep_info_sw_64()
+#define get_versiondep_info()   get_versiondep_info_sw_64()
+#define get_kaslr_offset(X)     stub_false()
+#define vaddr_to_paddr(X)       vaddr_to_paddr_sw_64(X)
+#define paddr_to_vaddr(X)       paddr_to_vaddr_general(X)
+#define is_phys_addr(X)         stub_true_ul(X)
+#define arch_crashkernel_mem_size()     stub_false()
+#endif          /* sw_64 */
+
+
 typedef unsigned long long mdf_pfn_t;
 
 #ifndef ARCH_PFN_OFFSET
@@ -2301,6 +2352,13 @@
 #define get_xen_info_arch(X) FALSE
 #endif	/* mips64 */
 
+#ifdef __sw_64__ /* sw_64 */
+#define kvtop_xen(X)    FALSE
+#define get_xen_basic_info_arch(X) FALSE
+#define get_xen_info_arch(X) FALSE
+#endif  /* sw_64 */
+
+
 struct cycle {
 	mdf_pfn_t start_pfn;
 	mdf_pfn_t end_pfn;
diff -Naru ./makedumpfile-1.7.0/Makefile ./makedumpfile-1.7.0-sw/Makefile
--- ./makedumpfile-1.7.0/Makefile	2021-11-08 00:36:15.000000000 +0000
+++ ./makedumpfile-1.7.0-sw/Makefile	2022-08-19 06:55:54.538591123 +0000
@@ -47,7 +47,7 @@
 SRC_BASE = makedumpfile.c makedumpfile.h diskdump_mod.h sadump_mod.h sadump_info.h
 SRC_PART = print_info.c dwarf_info.c elf_info.c erase_info.c sadump_info.c cache.c tools.c printk.c
 OBJ_PART=$(patsubst %.c,%.o,$(SRC_PART))
-SRC_ARCH = arch/arm.c arch/arm64.c arch/x86.c arch/x86_64.c arch/ia64.c arch/ppc64.c arch/s390x.c arch/ppc.c arch/sparc64.c arch/mips64.c
+SRC_ARCH = arch/arm.c arch/arm64.c arch/x86.c arch/x86_64.c arch/ia64.c arch/ppc64.c arch/s390x.c arch/ppc.c arch/sparc64.c arch/mips64.c arch/sw_64.c
 OBJ_ARCH=$(patsubst %.c,%.o,$(SRC_ARCH))
 
 LIBS = -ldw -lbz2 -ldl -lelf -lz