nds32: Remove the architecture

The nds32 architecture, also known as AndeStar V3, is a custom 32-bit
RISC target designed by Andes Technologies. Support was added to the
kernel in 2016 as the replacement RISC-V based V5 processors were
already announced, and maintained by (current or former) Andes
employees.

As explained by Alan Kao, new customers are now all using RISC-V,
and all known nds32 users are already on longterm stable kernels
provided by Andes, with no development work going into mainline
support any more.

While the port is still in a reasonably good shape, it only gets
worse over time without active maintainers, so it seems best
to remove it before it becomes unusable. As always, if it turns
out that there are mainline users after all, and they volunteer
to maintain the port in the future, the removal can be reverted.

Link: https://lore.kernel.org/linux-mm/YhdWNLUhk+x9RAzU@yamatobi.andestech.com/
Link: https://lore.kernel.org/lkml/20220302065213.82702-1-alankao@andestech.com/
Link: https://www.andestech.com/en/products-solutions/andestar-architecture/
Signed-off-by: Alan Kao <alankao@andestech.com>
[arnd: rewrite changelog to provide more background]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

10 files changed, 0 insertions, 2353 deletions

diff --git a/arch/nds32/mm/Makefile b/arch/nds32/mm/Makefile
deleted file mode 100644
index 14fb2e8eb036..000000000000
--- a/arch/nds32/mm/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-obj-y				:= extable.o tlb.o fault.o init.o mmap.o \
-                                   mm-nds32.o cacheflush.o proc.o
-
-obj-$(CONFIG_ALIGNMENT_TRAP)	+= alignment.o
-
-ifdef CONFIG_FUNCTION_TRACER
-CFLAGS_REMOVE_proc.o     = $(CC_FLAGS_FTRACE)
-endif
-CFLAGS_proc.o              += -fomit-frame-pointer
diff --git a/arch/nds32/mm/alignment.c b/arch/nds32/mm/alignment.c
deleted file mode 100644
index 9c2c0a454da8..000000000000
--- a/arch/nds32/mm/alignment.c
+++ /dev/null
@@ -1,575 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/proc_fs.h>
-#include <linux/uaccess.h>
-#include <linux/sysctl.h>
-#include <asm/unaligned.h>
-
-#define DEBUG(enable, tagged, ...)				\
-	do{							\
-		if (enable) {					\
-			if (tagged)				\
-			pr_warn("[ %30s() ] ", __func__);	\
-			pr_warn(__VA_ARGS__);			\
-		}						\
-	} while (0)
-
-#define RT(inst)	(((inst) >> 20) & 0x1FUL)
-#define RA(inst)	(((inst) >> 15) & 0x1FUL)
-#define RB(inst)	(((inst) >> 10) & 0x1FUL)
-#define SV(inst)	(((inst) >> 8) & 0x3UL)
-#define IMM(inst)	(((inst) >> 0) & 0x7FFFUL)
-
-#define RA3(inst)	(((inst) >> 3) & 0x7UL)
-#define RT3(inst)	(((inst) >> 6) & 0x7UL)
-#define IMM3U(inst)	(((inst) >> 0) & 0x7UL)
-
-#define RA5(inst)	(((inst) >> 0) & 0x1FUL)
-#define RT4(inst)	(((inst) >> 5) & 0xFUL)
-
-#define GET_IMMSVAL(imm_value) \
-	(((imm_value >> 14) & 0x1) ? (imm_value - 0x8000) : imm_value)
-
-#define __get8_data(val,addr,err)	\
-	__asm__(					\
-	"1:	lbi.bi	%1, [%2], #1\n"			\
-	"2:\n"						\
-	"	.pushsection .text.fixup,\"ax\"\n"	\
-	"	.align	2\n"				\
-	"3:	movi	%0, #1\n"			\
-	"	j	2b\n"				\
-	"	.popsection\n"				\
-	"	.pushsection __ex_table,\"a\"\n"	\
-	"	.align	3\n"				\
-	"	.long	1b, 3b\n"			\
-	"	.popsection\n"				\
-	: "=r" (err), "=&r" (val), "=r" (addr)		\
-	: "0" (err), "2" (addr))
-
-#define get16_data(addr, val_ptr)				\
-	do {							\
-		unsigned int err = 0, v, a = addr;		\
-		__get8_data(v,a,err);				\
-		*val_ptr =  v << 0;				\
-		__get8_data(v,a,err);				\
-		*val_ptr |= v << 8;				\
-		if (err)					\
-			goto fault;				\
-		*val_ptr = le16_to_cpu(*val_ptr);		\
-	} while(0)
-
-#define get32_data(addr, val_ptr)				\
-	do {							\
-		unsigned int err = 0, v, a = addr;		\
-		__get8_data(v,a,err);				\
-		*val_ptr =  v << 0;				\
-		__get8_data(v,a,err);				\
-		*val_ptr |= v << 8;				\
-		__get8_data(v,a,err);				\
-		*val_ptr |= v << 16;				\
-		__get8_data(v,a,err);				\
-		*val_ptr |= v << 24;				\
-		if (err)					\
-			goto fault;				\
-		*val_ptr = le32_to_cpu(*val_ptr);		\
-	} while(0)
-
-#define get_data(addr, val_ptr, len)				\
-	if (len == 2)						\
-		get16_data(addr, val_ptr);			\
-	else							\
-		get32_data(addr, val_ptr);
-
-#define set16_data(addr, val)					\
-	do {							\
-		unsigned int err = 0, *ptr = addr ;		\
-		val = le32_to_cpu(val);				\
-		__asm__(					\
-                "1:	sbi.bi 	%2, [%1], #1\n"			\
-                "	srli 	%2, %2, #8\n"			\
-                "2:	sbi	%2, [%1]\n"			\
-		"3:\n"						\
-		"	.pushsection .text.fixup,\"ax\"\n"	\
-		"	.align	2\n"				\
-		"4:	movi	%0, #1\n"			\
-		"	j	3b\n"				\
-		"	.popsection\n"				\
-		"	.pushsection __ex_table,\"a\"\n"	\
-		"	.align	3\n"				\
-		"	.long	1b, 4b\n"			\
-		"	.long	2b, 4b\n"			\
-		"	.popsection\n"				\
-		: "=r" (err), "+r" (ptr), "+r" (val)		\
-		: "0" (err)					\
-		);						\
-		if (err)					\
-			goto fault;				\
-	} while(0)
-
-#define set32_data(addr, val)					\
-	do {							\
-		unsigned int err = 0, *ptr = addr ;		\
-		val = le32_to_cpu(val);				\
-		__asm__(					\
-                "1:	sbi.bi 	%2, [%1], #1\n"			\
-                "	srli 	%2, %2, #8\n"			\
-                "2:	sbi.bi 	%2, [%1], #1\n"			\
-                "	srli 	%2, %2, #8\n"			\
-                "3:	sbi.bi 	%2, [%1], #1\n"			\
-                "	srli 	%2, %2, #8\n"			\
-                "4:	sbi 	%2, [%1]\n"			\
-		"5:\n"						\
-		"	.pushsection .text.fixup,\"ax\"\n"	\
-		"	.align	2\n"				\
-		"6:	movi	%0, #1\n"			\
-		"	j	5b\n"				\
-		"	.popsection\n"				\
-		"	.pushsection __ex_table,\"a\"\n"	\
-		"	.align	3\n"				\
-		"	.long	1b, 6b\n"			\
-		"	.long	2b, 6b\n"			\
-		"	.long	3b, 6b\n"			\
-		"	.long	4b, 6b\n"			\
-		"	.popsection\n"				\
-		: "=r" (err), "+r" (ptr), "+r" (val)		\
-		: "0" (err)					\
-		);						\
-		if (err)					\
-			goto fault;				\
-	} while(0)
-#define set_data(addr, val, len)				\
-	if (len == 2)						\
-		set16_data(addr, val);				\
-	else							\
-		set32_data(addr, val);
-#define NDS32_16BIT_INSTRUCTION	0x80000000
-
-extern pte_t va_present(struct mm_struct *mm, unsigned long addr);
-extern pte_t va_kernel_present(unsigned long addr);
-extern int va_readable(struct pt_regs *regs, unsigned long addr);
-extern int va_writable(struct pt_regs *regs, unsigned long addr);
-
-int unalign_access_mode = 0, unalign_access_debug = 0;
-
-static inline unsigned long *idx_to_addr(struct pt_regs *regs, int idx)
-{
-	/* this should be consistent with ptrace.h */
-	if (idx >= 0 && idx <= 25)	/* R0-R25 */
-		return &regs->uregs[0] + idx;
-	else if (idx >= 28 && idx <= 30)	/* FP, GP, LP */
-		return &regs->fp + (idx - 28);
-	else if (idx == 31)	/* SP */
-		return &regs->sp;
-	else
-		return NULL;	/* cause a segfault */
-}
-
-static inline unsigned long get_inst(unsigned long addr)
-{
-	return be32_to_cpu(get_unaligned((u32 *) addr));
-}
-
-static inline unsigned long sign_extend(unsigned long val, int len)
-{
-	unsigned long ret = 0;
-	unsigned char *s, *t;
-	int i = 0;
-
-	val = cpu_to_le32(val);
-
-	s = (void *)&val;
-	t = (void *)&ret;
-
-	while (i++ < len)
-		*t++ = *s++;
-
-	if (((*(t - 1)) & 0x80) && (i < 4)) {
-
-		while (i++ <= 4)
-			*t++ = 0xff;
-	}
-
-	return le32_to_cpu(ret);
-}
-
-static inline int do_16(unsigned long inst, struct pt_regs *regs)
-{
-	int imm, regular, load, len, addr_mode, idx_mode;
-	unsigned long unaligned_addr, target_val, source_idx, target_idx,
-	    shift = 0;
-	switch ((inst >> 9) & 0x3F) {
-
-	case 0x12:		/* LHI333    */
-		imm = 1;
-		regular = 1;
-		load = 1;
-		len = 2;
-		addr_mode = 3;
-		idx_mode = 3;
-		break;
-	case 0x10:		/* LWI333    */
-		imm = 1;
-		regular = 1;
-		load = 1;
-		len = 4;
-		addr_mode = 3;
-		idx_mode = 3;
-		break;
-	case 0x11:		/* LWI333.bi */
-		imm = 1;
-		regular = 0;
-		load = 1;
-		len = 4;
-		addr_mode = 3;
-		idx_mode = 3;
-		break;
-	case 0x1A:		/* LWI450    */
-		imm = 0;
-		regular = 1;
-		load = 1;
-		len = 4;
-		addr_mode = 5;
-		idx_mode = 4;
-		break;
-	case 0x16:		/* SHI333    */
-		imm = 1;
-		regular = 1;
-		load = 0;
-		len = 2;
-		addr_mode = 3;
-		idx_mode = 3;
-		break;
-	case 0x14:		/* SWI333    */
-		imm = 1;
-		regular = 1;
-		load = 0;
-		len = 4;
-		addr_mode = 3;
-		idx_mode = 3;
-		break;
-	case 0x15:		/* SWI333.bi */
-		imm = 1;
-		regular = 0;
-		load = 0;
-		len = 4;
-		addr_mode = 3;
-		idx_mode = 3;
-		break;
-	case 0x1B:		/* SWI450    */
-		imm = 0;
-		regular = 1;
-		load = 0;
-		len = 4;
-		addr_mode = 5;
-		idx_mode = 4;
-		break;
-
-	default:
-		return -EFAULT;
-	}
-
-	if (addr_mode == 3) {
-		unaligned_addr = *idx_to_addr(regs, RA3(inst));
-		source_idx = RA3(inst);
-	} else {
-		unaligned_addr = *idx_to_addr(regs, RA5(inst));
-		source_idx = RA5(inst);
-	}
-
-	if (idx_mode == 3)
-		target_idx = RT3(inst);
-	else
-		target_idx = RT4(inst);
-
-	if (imm)
-		shift = IMM3U(inst) * len;
-
-	if (regular)
-		unaligned_addr += shift;
-
-	if (load) {
-		if (!access_ok((void *)unaligned_addr, len))
-			return -EACCES;
-
-		get_data(unaligned_addr, &target_val, len);
-		*idx_to_addr(regs, target_idx) = target_val;
-	} else {
-		if (!access_ok((void *)unaligned_addr, len))
-			return -EACCES;
-		target_val = *idx_to_addr(regs, target_idx);
-		set_data((void *)unaligned_addr, target_val, len);
-	}
-
-	if (!regular)
-		*idx_to_addr(regs, source_idx) = unaligned_addr + shift;
-	regs->ipc += 2;
-
-	return 0;
-fault:
-	return -EACCES;
-}
-
-static inline int do_32(unsigned long inst, struct pt_regs *regs)
-{
-	int imm, regular, load, len, sign_ext;
-	unsigned long unaligned_addr, target_val, shift;
-
-	unaligned_addr = *idx_to_addr(regs, RA(inst));
-
-	switch ((inst >> 25) << 1) {
-
-	case 0x02:		/* LHI       */
-		imm = 1;
-		regular = 1;
-		load = 1;
-		len = 2;
-		sign_ext = 0;
-		break;
-	case 0x0A:		/* LHI.bi    */
-		imm = 1;
-		regular = 0;
-		load = 1;
-		len = 2;
-		sign_ext = 0;
-		break;
-	case 0x22:		/* LHSI      */
-		imm = 1;
-		regular = 1;
-		load = 1;
-		len = 2;
-		sign_ext = 1;
-		break;
-	case 0x2A:		/* LHSI.bi   */
-		imm = 1;
-		regular = 0;
-		load = 1;
-		len = 2;
-		sign_ext = 1;
-		break;
-	case 0x04:		/* LWI       */
-		imm = 1;
-		regular = 1;
-		load = 1;
-		len = 4;
-		sign_ext = 0;
-		break;
-	case 0x0C:		/* LWI.bi    */
-		imm = 1;
-		regular = 0;
-		load = 1;
-		len = 4;
-		sign_ext = 0;
-		break;
-	case 0x12:		/* SHI       */
-		imm = 1;
-		regular = 1;
-		load = 0;
-		len = 2;
-		sign_ext = 0;
-		break;
-	case 0x1A:		/* SHI.bi    */
-		imm = 1;
-		regular = 0;
-		load = 0;
-		len = 2;
-		sign_ext = 0;
-		break;
-	case 0x14:		/* SWI       */
-		imm = 1;
-		regular = 1;
-		load = 0;
-		len = 4;
-		sign_ext = 0;
-		break;
-	case 0x1C:		/* SWI.bi    */
-		imm = 1;
-		regular = 0;
-		load = 0;
-		len = 4;
-		sign_ext = 0;
-		break;
-
-	default:
-		switch (inst & 0xff) {
-
-		case 0x01:	/* LH        */
-			imm = 0;
-			regular = 1;
-			load = 1;
-			len = 2;
-			sign_ext = 0;
-			break;
-		case 0x05:	/* LH.bi     */
-			imm = 0;
-			regular = 0;
-			load = 1;
-			len = 2;
-			sign_ext = 0;
-			break;
-		case 0x11:	/* LHS       */
-			imm = 0;
-			regular = 1;
-			load = 1;
-			len = 2;
-			sign_ext = 1;
-			break;
-		case 0x15:	/* LHS.bi    */
-			imm = 0;
-			regular = 0;
-			load = 1;
-			len = 2;
-			sign_ext = 1;
-			break;
-		case 0x02:	/* LW        */
-			imm = 0;
-			regular = 1;
-			load = 1;
-			len = 4;
-			sign_ext = 0;
-			break;
-		case 0x06:	/* LW.bi     */
-			imm = 0;
-			regular = 0;
-			load = 1;
-			len = 4;
-			sign_ext = 0;
-			break;
-		case 0x09:	/* SH        */
-			imm = 0;
-			regular = 1;
-			load = 0;
-			len = 2;
-			sign_ext = 0;
-			break;
-		case 0x0D:	/* SH.bi     */
-			imm = 0;
-			regular = 0;
-			load = 0;
-			len = 2;
-			sign_ext = 0;
-			break;
-		case 0x0A:	/* SW        */
-			imm = 0;
-			regular = 1;
-			load = 0;
-			len = 4;
-			sign_ext = 0;
-			break;
-		case 0x0E:	/* SW.bi     */
-			imm = 0;
-			regular = 0;
-			load = 0;
-			len = 4;
-			sign_ext = 0;
-			break;
-
-		default:
-			return -EFAULT;
-		}
-	}
-
-	if (imm)
-		shift = GET_IMMSVAL(IMM(inst)) * len;
-	else
-		shift = *idx_to_addr(regs, RB(inst)) << SV(inst);
-
-	if (regular)
-		unaligned_addr += shift;
-
-	if (load) {
-
-		if (!access_ok((void *)unaligned_addr, len))
-			return -EACCES;
-
-		get_data(unaligned_addr, &target_val, len);
-
-		if (sign_ext)
-			*idx_to_addr(regs, RT(inst)) =
-			    sign_extend(target_val, len);
-		else
-			*idx_to_addr(regs, RT(inst)) = target_val;
-	} else {
-
-		if (!access_ok((void *)unaligned_addr, len))
-			return -EACCES;
-
-		target_val = *idx_to_addr(regs, RT(inst));
-		set_data((void *)unaligned_addr, target_val, len);
-	}
-
-	if (!regular)
-		*idx_to_addr(regs, RA(inst)) = unaligned_addr + shift;
-
-	regs->ipc += 4;
-
-	return 0;
-fault:
-	return -EACCES;
-}
-
-int do_unaligned_access(unsigned long addr, struct pt_regs *regs)
-{
-	unsigned long inst;
-	int ret = -EFAULT;
-
-	inst = get_inst(regs->ipc);
-
-	DEBUG((unalign_access_debug > 0), 1,
-	      "Faulting addr: 0x%08lx, pc: 0x%08lx [inst: 0x%08lx ]\n", addr,
-	      regs->ipc, inst);
-
-	if (inst & NDS32_16BIT_INSTRUCTION)
-		ret = do_16((inst >> 16) & 0xffff, regs);
-	else
-		ret = do_32(inst, regs);
-
-	return ret;
-}
-
-#ifdef CONFIG_PROC_FS
-
-static struct ctl_table alignment_tbl[3] = {
-	{
-	 .procname = "enable",
-	 .data = &unalign_access_mode,
-	 .maxlen = sizeof(unalign_access_mode),
-	 .mode = 0666,
-	 .proc_handler = &proc_dointvec
-	}
-	,
-	{
-	 .procname = "debug_info",
-	 .data = &unalign_access_debug,
-	 .maxlen = sizeof(unalign_access_debug),
-	 .mode = 0644,
-	 .proc_handler = &proc_dointvec
-	}
-	,
-	{}
-};
-
-static struct ctl_table nds32_sysctl_table[2] = {
-	{
-	 .procname = "unaligned_access",
-	 .mode = 0555,
-	 .child = alignment_tbl},
-	{}
-};
-
-static struct ctl_path nds32_path[2] = {
-	{.procname = "nds32"},
-	{}
-};
-
-/*
- * Initialize nds32 alignment-correction interface
- */
-static int __init nds32_sysctl_init(void)
-{
-	register_sysctl_paths(nds32_path, nds32_sysctl_table);
-	return 0;
-}
-
-__initcall(nds32_sysctl_init);
-#endif /* CONFIG_PROC_FS */
diff --git a/arch/nds32/mm/cacheflush.c b/arch/nds32/mm/cacheflush.c
deleted file mode 100644
index 07aac65d1cab..000000000000
--- a/arch/nds32/mm/cacheflush.c
+++ /dev/null
@@ -1,338 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include <linux/module.h>
-#include <asm/cacheflush.h>
-#include <asm/proc-fns.h>
-#include <asm/shmparam.h>
-#include <asm/cache_info.h>
-
-extern struct cache_info L1_cache_info[2];
-
-void flush_icache_range(unsigned long start, unsigned long end)
-{
-	unsigned long line_size, flags;
-	line_size = L1_cache_info[DCACHE].line_size;
-	start = start & ~(line_size - 1);
-	end = (end + line_size - 1) & ~(line_size - 1);
-	local_irq_save(flags);
-	cpu_cache_wbinval_range(start, end, 1);
-	local_irq_restore(flags);
-}
-EXPORT_SYMBOL(flush_icache_range);
-
-void flush_icache_page(struct vm_area_struct *vma, struct page *page)
-{
-	unsigned long flags;
-	unsigned long kaddr;
-	local_irq_save(flags);
-	kaddr = (unsigned long)kmap_atomic(page);
-	cpu_cache_wbinval_page(kaddr, vma->vm_flags & VM_EXEC);
-	kunmap_atomic((void *)kaddr);
-	local_irq_restore(flags);
-}
-
-void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
-	                     unsigned long addr, int len)
-{
-	unsigned long kaddr;
-	kaddr = (unsigned long)kmap_atomic(page) + (addr & ~PAGE_MASK);
-	flush_icache_range(kaddr, kaddr + len);
-	kunmap_atomic((void *)kaddr);
-}
-
-void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
-		      pte_t * pte)
-{
-	struct page *page;
-	unsigned long pfn = pte_pfn(*pte);
-	unsigned long flags;
-
-	if (!pfn_valid(pfn))
-		return;
-
-	if (vma->vm_mm == current->active_mm) {
-		local_irq_save(flags);
-		__nds32__mtsr_dsb(addr, NDS32_SR_TLB_VPN);
-		__nds32__tlbop_rwr(*pte);
-		__nds32__isb();
-		local_irq_restore(flags);
-	}
-	page = pfn_to_page(pfn);
-
-	if ((test_and_clear_bit(PG_dcache_dirty, &page->flags)) ||
-	    (vma->vm_flags & VM_EXEC)) {
-		unsigned long kaddr;
-		local_irq_save(flags);
-		kaddr = (unsigned long)kmap_atomic(page);
-		cpu_cache_wbinval_page(kaddr, vma->vm_flags & VM_EXEC);
-		kunmap_atomic((void *)kaddr);
-		local_irq_restore(flags);
-	}
-}
-#ifdef CONFIG_CPU_CACHE_ALIASING
-extern pte_t va_present(struct mm_struct *mm, unsigned long addr);
-
-static inline unsigned long aliasing(unsigned long addr, unsigned long page)
-{
-	return ((addr & PAGE_MASK) ^ page) & (SHMLBA - 1);
-}
-
-static inline unsigned long kremap0(unsigned long uaddr, unsigned long pa)
-{
-	unsigned long kaddr, pte;
-
-#define BASE_ADDR0 0xffffc000
-	kaddr = BASE_ADDR0 | (uaddr & L1_cache_info[DCACHE].aliasing_mask);
-	pte = (pa | PAGE_KERNEL);
-	__nds32__mtsr_dsb(kaddr, NDS32_SR_TLB_VPN);
-	__nds32__tlbop_rwlk(pte);
-	__nds32__isb();
-	return kaddr;
-}
-
-static inline void kunmap01(unsigned long kaddr)
-{
-	__nds32__tlbop_unlk(kaddr);
-	__nds32__tlbop_inv(kaddr);
-	__nds32__isb();
-}
-
-static inline unsigned long kremap1(unsigned long uaddr, unsigned long pa)
-{
-	unsigned long kaddr, pte;
-
-#define BASE_ADDR1 0xffff8000
-	kaddr = BASE_ADDR1 | (uaddr & L1_cache_info[DCACHE].aliasing_mask);
-	pte = (pa | PAGE_KERNEL);
-	__nds32__mtsr_dsb(kaddr, NDS32_SR_TLB_VPN);
-	__nds32__tlbop_rwlk(pte);
-	__nds32__isb();
-	return kaddr;
-}
-
-void flush_cache_mm(struct mm_struct *mm)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-	cpu_dcache_wbinval_all();
-	cpu_icache_inval_all();
-	local_irq_restore(flags);
-}
-
-void flush_cache_dup_mm(struct mm_struct *mm)
-{
-}
-
-void flush_cache_range(struct vm_area_struct *vma,
-		       unsigned long start, unsigned long end)
-{
-	unsigned long flags;
-
-	if ((end - start) > 8 * PAGE_SIZE) {
-		cpu_dcache_wbinval_all();
-		if (vma->vm_flags & VM_EXEC)
-			cpu_icache_inval_all();
-		return;
-	}
-	local_irq_save(flags);
-	while (start < end) {
-		if (va_present(vma->vm_mm, start))
-			cpu_cache_wbinval_page(start, vma->vm_flags & VM_EXEC);
-		start += PAGE_SIZE;
-	}
-	local_irq_restore(flags);
-	return;
-}
-
-void flush_cache_page(struct vm_area_struct *vma,
-		      unsigned long addr, unsigned long pfn)
-{
-	unsigned long vto, flags;
-
-	local_irq_save(flags);
-	vto = kremap0(addr, pfn << PAGE_SHIFT);
-	cpu_cache_wbinval_page(vto, vma->vm_flags & VM_EXEC);
-	kunmap01(vto);
-	local_irq_restore(flags);
-}
-
-void flush_cache_vmap(unsigned long start, unsigned long end)
-{
-	cpu_dcache_wbinval_all();
-	cpu_icache_inval_all();
-}
-
-void flush_cache_vunmap(unsigned long start, unsigned long end)
-{
-	cpu_dcache_wbinval_all();
-	cpu_icache_inval_all();
-}
-
-void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
-		    struct page *to)
-{
-	cpu_dcache_wbinval_page((unsigned long)vaddr);
-	cpu_icache_inval_page((unsigned long)vaddr);
-	copy_page(vto, vfrom);
-	cpu_dcache_wbinval_page((unsigned long)vto);
-	cpu_icache_inval_page((unsigned long)vto);
-}
-
-void clear_user_page(void *addr, unsigned long vaddr, struct page *page)
-{
-	cpu_dcache_wbinval_page((unsigned long)vaddr);
-	cpu_icache_inval_page((unsigned long)vaddr);
-	clear_page(addr);
-	cpu_dcache_wbinval_page((unsigned long)addr);
-	cpu_icache_inval_page((unsigned long)addr);
-}
-
-void copy_user_highpage(struct page *to, struct page *from,
-			unsigned long vaddr, struct vm_area_struct *vma)
-{
-	unsigned long vto, vfrom, flags, kto, kfrom, pfrom, pto;
-	kto = ((unsigned long)page_address(to) & PAGE_MASK);
-	kfrom = ((unsigned long)page_address(from) & PAGE_MASK);
-	pto = page_to_phys(to);
-	pfrom = page_to_phys(from);
-
-	local_irq_save(flags);
-	if (aliasing(vaddr, (unsigned long)kfrom))
-		cpu_dcache_wb_page((unsigned long)kfrom);
-	vto = kremap0(vaddr, pto);
-	vfrom = kremap1(vaddr, pfrom);
-	copy_page((void *)vto, (void *)vfrom);
-	kunmap01(vfrom);
-	kunmap01(vto);
-	local_irq_restore(flags);
-}
-
-EXPORT_SYMBOL(copy_user_highpage);
-
-void clear_user_highpage(struct page *page, unsigned long vaddr)
-{
-	unsigned long vto, flags, kto;
-
-	kto = ((unsigned long)page_address(page) & PAGE_MASK);
-
-	local_irq_save(flags);
-	if (aliasing(kto, vaddr) && kto != 0) {
-		cpu_dcache_inval_page(kto);
-		cpu_icache_inval_page(kto);
-	}
-	vto = kremap0(vaddr, page_to_phys(page));
-	clear_page((void *)vto);
-	kunmap01(vto);
-	local_irq_restore(flags);
-}
-
-EXPORT_SYMBOL(clear_user_highpage);
-
-void flush_dcache_page(struct page *page)
-{
-	struct address_space *mapping;
-
-	mapping = page_mapping_file(page);
-	if (mapping && !mapping_mapped(mapping))
-		set_bit(PG_dcache_dirty, &page->flags);
-	else {
-		unsigned long kaddr, flags;
-
-		kaddr = (unsigned long)page_address(page);
-		local_irq_save(flags);
-		cpu_dcache_wbinval_page(kaddr);
-		if (mapping) {
-			unsigned long vaddr, kto;
-
-			vaddr = page->index << PAGE_SHIFT;
-			if (aliasing(vaddr, kaddr)) {
-				kto = kremap0(vaddr, page_to_phys(page));
-				cpu_dcache_wbinval_page(kto);
-				kunmap01(kto);
-			}
-		}
-		local_irq_restore(flags);
-	}
-}
-EXPORT_SYMBOL(flush_dcache_page);
-
-void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
-		       unsigned long vaddr, void *dst, void *src, int len)
-{
-	unsigned long line_size, start, end, vto, flags;
-
-	local_irq_save(flags);
-	vto = kremap0(vaddr, page_to_phys(page));
-	dst = (void *)(vto | (vaddr & (PAGE_SIZE - 1)));
-	memcpy(dst, src, len);
-	if (vma->vm_flags & VM_EXEC) {
-		line_size = L1_cache_info[DCACHE].line_size;
-		start = (unsigned long)dst & ~(line_size - 1);
-		end =
-		    ((unsigned long)dst + len + line_size - 1) & ~(line_size -
-								   1);
-		cpu_cache_wbinval_range(start, end, 1);
-	}
-	kunmap01(vto);
-	local_irq_restore(flags);
-}
-
-void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
-			 unsigned long vaddr, void *dst, void *src, int len)
-{
-	unsigned long vto, flags;
-
-	local_irq_save(flags);
-	vto = kremap0(vaddr, page_to_phys(page));
-	src = (void *)(vto | (vaddr & (PAGE_SIZE - 1)));
-	memcpy(dst, src, len);
-	kunmap01(vto);
-	local_irq_restore(flags);
-}
-
-void flush_anon_page(struct vm_area_struct *vma,
-		     struct page *page, unsigned long vaddr)
-{
-	unsigned long kaddr, flags, ktmp;
-	if (!PageAnon(page))
-		return;
-
-	if (vma->vm_mm != current->active_mm)
-		return;
-
-	local_irq_save(flags);
-	if (vma->vm_flags & VM_EXEC)
-		cpu_icache_inval_page(vaddr & PAGE_MASK);
-	kaddr = (unsigned long)page_address(page);
-	if (aliasing(vaddr, kaddr)) {
-		ktmp = kremap0(vaddr, page_to_phys(page));
-		cpu_dcache_wbinval_page(ktmp);
-		kunmap01(ktmp);
-	}
-	local_irq_restore(flags);
-}
-
-void flush_kernel_vmap_range(void *addr, int size)
-{
-	unsigned long flags;
-	local_irq_save(flags);
-	cpu_dcache_wb_range((unsigned long)addr, (unsigned long)addr +  size);
-	local_irq_restore(flags);
-}
-EXPORT_SYMBOL(flush_kernel_vmap_range);
-
-void invalidate_kernel_vmap_range(void *addr, int size)
-{
-	unsigned long flags;
-	local_irq_save(flags);
-	cpu_dcache_inval_range((unsigned long)addr, (unsigned long)addr + size);
-	local_irq_restore(flags);
-}
-EXPORT_SYMBOL(invalidate_kernel_vmap_range);
-#endif
diff --git a/arch/nds32/mm/extable.c b/arch/nds32/mm/extable.c
deleted file mode 100644
index db7f0a7c8966..000000000000
--- a/arch/nds32/mm/extable.c
+++ /dev/null
@@ -1,16 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/extable.h>
-#include <linux/uaccess.h>
-
-int fixup_exception(struct pt_regs *regs)
-{
-	const struct exception_table_entry *fixup;
-
-	fixup = search_exception_tables(instruction_pointer(regs));
-	if (fixup)
-		regs->ipc = fixup->fixup;
-
-	return fixup != NULL;
-}
diff --git a/arch/nds32/mm/fault.c b/arch/nds32/mm/fault.c
deleted file mode 100644
index 636977a1c8b9..000000000000
--- a/arch/nds32/mm/fault.c
+++ /dev/null
@@ -1,396 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/extable.h>
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/ptrace.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/hardirq.h>
-#include <linux/uaccess.h>
-#include <linux/perf_event.h>
-
-#include <asm/tlbflush.h>
-
-extern void __noreturn die(const char *str, struct pt_regs *regs, long err);
-
-/*
- * This is useful to dump out the page tables associated with
- * 'addr' in mm 'mm'.
- */
-void show_pte(struct mm_struct *mm, unsigned long addr)
-{
-	pgd_t *pgd;
-	if (!mm)
-		mm = &init_mm;
-
-	pr_alert("pgd = %p\n", mm->pgd);
-	pgd = pgd_offset(mm, addr);
-	pr_alert("[%08lx] *pgd=%08lx", addr, pgd_val(*pgd));
-
-	do {
-		p4d_t *p4d;
-		pud_t *pud;
-		pmd_t *pmd;
-
-		if (pgd_none(*pgd))
-			break;
-
-		if (pgd_bad(*pgd)) {
-			pr_alert("(bad)");
-			break;
-		}
-
-		p4d = p4d_offset(pgd, addr);
-		pud = pud_offset(p4d, addr);
-		pmd = pmd_offset(pud, addr);
-#if PTRS_PER_PMD != 1
-		pr_alert(", *pmd=%08lx", pmd_val(*pmd));
-#endif
-
-		if (pmd_none(*pmd))
-			break;
-
-		if (pmd_bad(*pmd)) {
-			pr_alert("(bad)");
-			break;
-		}
-
-		if (IS_ENABLED(CONFIG_HIGHMEM))
-		{
-			pte_t *pte;
-			/* We must not map this if we have highmem enabled */
-			pte = pte_offset_map(pmd, addr);
-			pr_alert(", *pte=%08lx", pte_val(*pte));
-			pte_unmap(pte);
-		}
-	} while (0);
-
-	pr_alert("\n");
-}
-
-void do_page_fault(unsigned long entry, unsigned long addr,
-		   unsigned int error_code, struct pt_regs *regs)
-{
-	struct task_struct *tsk;
-	struct mm_struct *mm;
-	struct vm_area_struct *vma;
-	int si_code;
-	vm_fault_t fault;
-	unsigned int mask = VM_ACCESS_FLAGS;
-	unsigned int flags = FAULT_FLAG_DEFAULT;
-
-	error_code = error_code & (ITYPE_mskINST | ITYPE_mskETYPE);
-	tsk = current;
-	mm = tsk->mm;
-	si_code = SEGV_MAPERR;
-	/*
-	 * We fault-in kernel-space virtual memory on-demand. The
-	 * 'reference' page table is init_mm.pgd.
-	 *
-	 * NOTE! We MUST NOT take any locks for this case. We may
-	 * be in an interrupt or a critical region, and should
-	 * only copy the information from the master page table,
-	 * nothing more.
-	 */
-	if (addr >= TASK_SIZE) {
-		if (user_mode(regs))
-			goto bad_area_nosemaphore;
-
-		if (addr >= TASK_SIZE && addr < VMALLOC_END
-		    && (entry == ENTRY_PTE_NOT_PRESENT))
-			goto vmalloc_fault;
-		else
-			goto no_context;
-	}
-
-	/* Send a signal to the task for handling the unalignment access. */
-	if (entry == ENTRY_GENERAL_EXCPETION
-	    && error_code == ETYPE_ALIGNMENT_CHECK) {
-		if (user_mode(regs))
-			goto bad_area_nosemaphore;
-		else
-			goto no_context;
-	}
-
-	/*
-	 * If we're in an interrupt or have no user
-	 * context, we must not take the fault..
-	 */
-	if (unlikely(faulthandler_disabled() || !mm))
-		goto no_context;
-
-	perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr);
-
-	/*
-	 * As per x86, we may deadlock here. However, since the kernel only
-	 * validly references user space from well defined areas of the code,
-	 * we can bug out early if this is from code which shouldn't.
-	 */
-	if (unlikely(!mmap_read_trylock(mm))) {
-		if (!user_mode(regs) &&
-		    !search_exception_tables(instruction_pointer(regs)))
-			goto no_context;
-retry:
-		mmap_read_lock(mm);
-	} else {
-		/*
-		 * The above down_read_trylock() might have succeeded in which
-		 * case, we'll have missed the might_sleep() from down_read().
-		 */
-		might_sleep();
-		if (IS_ENABLED(CONFIG_DEBUG_VM)) {
-			if (!user_mode(regs) &&
-			    !search_exception_tables(instruction_pointer(regs)))
-				goto no_context;
-		}
-	}
-
-	vma = find_vma(mm, addr);
-
-	if (unlikely(!vma))
-		goto bad_area;
-
-	if (vma->vm_start <= addr)
-		goto good_area;
-
-	if (unlikely(!(vma->vm_flags & VM_GROWSDOWN)))
-		goto bad_area;
-
-	if (unlikely(expand_stack(vma, addr)))
-		goto bad_area;
-
-	/*
-	 * Ok, we have a good vm_area for this memory access, so
-	 * we can handle it..
-	 */
-
-good_area:
-	si_code = SEGV_ACCERR;
-
-	/* first do some preliminary protection checks */
-	if (entry == ENTRY_PTE_NOT_PRESENT) {
-		if (error_code & ITYPE_mskINST)
-			mask = VM_EXEC;
-		else {
-			mask = VM_READ | VM_WRITE;
-		}
-	} else if (entry == ENTRY_TLB_MISC) {
-		switch (error_code & ITYPE_mskETYPE) {
-		case RD_PROT:
-			mask = VM_READ;
-			break;
-		case WRT_PROT:
-			mask = VM_WRITE;
-			flags |= FAULT_FLAG_WRITE;
-			break;
-		case NOEXEC:
-			mask = VM_EXEC;
-			break;
-		case PAGE_MODIFY:
-			mask = VM_WRITE;
-			flags |= FAULT_FLAG_WRITE;
-			break;
-		case ACC_BIT:
-			BUG();
-		default:
-			break;
-		}
-
-	}
-	if (!(vma->vm_flags & mask))
-		goto bad_area;
-
-	/*
-	 * If for any reason at all we couldn't handle the fault,
-	 * make sure we exit gracefully rather than endlessly redo
-	 * the fault.
-	 */
-
-	fault = handle_mm_fault(vma, addr, flags, regs);
-
-	/*
-	 * If we need to retry but a fatal signal is pending, handle the
-	 * signal first. We do not need to release the mmap_lock because it
-	 * would already be released in __lock_page_or_retry in mm/filemap.c.
-	 */
-	if (fault_signal_pending(fault, regs)) {
-		if (!user_mode(regs))
-			goto no_context;
-		return;
-	}
-
-	if (unlikely(fault & VM_FAULT_ERROR)) {
-		if (fault & VM_FAULT_OOM)
-			goto out_of_memory;
-		else if (fault & VM_FAULT_SIGBUS)
-			goto do_sigbus;
-		else
-			goto bad_area;
-	}
-
-	if (fault & VM_FAULT_RETRY) {
-		flags |= FAULT_FLAG_TRIED;
-
-		/* No need to mmap_read_unlock(mm) as we would
-		 * have already released it in __lock_page_or_retry
-		 * in mm/filemap.c.
-		 */
-		goto retry;
-	}
-
-	mmap_read_unlock(mm);
-	return;
-
-	/*
-	 * Something tried to access memory that isn't in our memory map..
-	 * Fix it, but check if it's kernel or user first..
-	 */
-bad_area:
-	mmap_read_unlock(mm);
-
-bad_area_nosemaphore:
-
-	/* User mode accesses just cause a SIGSEGV */
-
-	if (user_mode(regs)) {
-		tsk->thread.address = addr;
-		tsk->thread.error_code = error_code;
-		tsk->thread.trap_no = entry;
-		force_sig_fault(SIGSEGV, si_code, (void __user *)addr);
-		return;
-	}
-
-no_context:
-
-	/* Are we prepared to handle this kernel fault?
-	 *
-	 * (The kernel has valid exception-points in the source
-	 *  when it acesses user-memory. When it fails in one
-	 *  of those points, we find it in a table and do a jump
-	 *  to some fixup code that loads an appropriate error
-	 *  code)
-	 */
-
-	{
-		const struct exception_table_entry *entry;
-
-		if ((entry =
-		     search_exception_tables(instruction_pointer(regs))) !=
-		    NULL) {
-			/* Adjust the instruction pointer in the stackframe */
-			instruction_pointer(regs) = entry->fixup;
-			return;
-		}
-	}
-
-	/*
-	 * Oops. The kernel tried to access some bad page. We'll have to
-	 * terminate things with extreme prejudice.
-	 */
-
-	bust_spinlocks(1);
-	pr_alert("Unable to handle kernel %s at virtual address %08lx\n",
-		 (addr < PAGE_SIZE) ? "NULL pointer dereference" :
-		 "paging request", addr);
-
-	show_pte(mm, addr);
-	die("Oops", regs, error_code);
-
-	/*
-	 * We ran out of memory, or some other thing happened to us that made
-	 * us unable to handle the page fault gracefully.
-	 */
-
-out_of_memory:
-	mmap_read_unlock(mm);
-	if (!user_mode(regs))
-		goto no_context;
-	pagefault_out_of_memory();
-	return;
-
-do_sigbus:
-	mmap_read_unlock(mm);
-
-	/* Kernel mode? Handle exceptions or die */
-	if (!user_mode(regs))
-		goto no_context;
-
-	/*
-	 * Send a sigbus
-	 */
-	tsk->thread.address = addr;
-	tsk->thread.error_code = error_code;
-	tsk->thread.trap_no = entry;
-	force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)addr);
-
-	return;
-
-vmalloc_fault:
-	{
-		/*
-		 * Synchronize this task's top level page-table
-		 * with the 'reference' page table.
-		 *
-		 * Use current_pgd instead of tsk->active_mm->pgd
-		 * since the latter might be unavailable if this
-		 * code is executed in a misfortunately run irq
-		 * (like inside schedule() between switch_mm and
-		 *  switch_to...).
-		 */
-
-		unsigned int index = pgd_index(addr);
-		pgd_t *pgd, *pgd_k;
-		p4d_t *p4d, *p4d_k;
-		pud_t *pud, *pud_k;
-		pmd_t *pmd, *pmd_k;
-		pte_t *pte_k;
-
-		pgd = (pgd_t *) __va(__nds32__mfsr(NDS32_SR_L1_PPTB)) + index;
-		pgd_k = init_mm.pgd + index;
-
-		if (!pgd_present(*pgd_k))
-			goto no_context;
-
-		p4d = p4d_offset(pgd, addr);
-		p4d_k = p4d_offset(pgd_k, addr);
-		if (!p4d_present(*p4d_k))
-			goto no_context;
-
-		pud = pud_offset(p4d, addr);
-		pud_k = pud_offset(p4d_k, addr);
-		if (!pud_present(*pud_k))
-			goto no_context;
-
-		pmd = pmd_offset(pud, addr);
-		pmd_k = pmd_offset(pud_k, addr);
-		if (!pmd_present(*pmd_k))
-			goto no_context;
-
-		if (!pmd_present(*pmd))
-			set_pmd(pmd, *pmd_k);
-		else
-			BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
-
-		/*
-		 * Since the vmalloc area is global, we don't
-		 * need to copy individual PTE's, it is enough to
-		 * copy the pgd pointer into the pte page of the
-		 * root task. If that is there, we'll find our pte if
-		 * it exists.
-		 */
-
-		/* Make sure the actual PTE exists as well to
-		 * catch kernel vmalloc-area accesses to non-mapped
-		 * addres. If we don't do this, this will just
-		 * silently loop forever.
-		 */
-
-		pte_k = pte_offset_kernel(pmd_k, addr);
-		if (!pte_present(*pte_k))
-			goto no_context;
-
-		return;
-	}
-}
diff --git a/arch/nds32/mm/init.c b/arch/nds32/mm/init.c
deleted file mode 100644
index f63f839738c4..000000000000
--- a/arch/nds32/mm/init.c
+++ /dev/null
@@ -1,263 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 1995-2005 Russell King
-// Copyright (C) 2012 ARM Ltd.
-// Copyright (C) 2013-2017 Andes Technology Corporation
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/swap.h>
-#include <linux/init.h>
-#include <linux/memblock.h>
-#include <linux/mman.h>
-#include <linux/nodemask.h>
-#include <linux/initrd.h>
-#include <linux/highmem.h>
-
-#include <asm/sections.h>
-#include <asm/setup.h>
-#include <asm/tlb.h>
-#include <asm/page.h>
-
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-DEFINE_SPINLOCK(anon_alias_lock);
-extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
-
-/*
- * empty_zero_page is a special page that is used for
- * zero-initialized data and COW.
- */
-struct page *empty_zero_page;
-EXPORT_SYMBOL(empty_zero_page);
-
-static void __init zone_sizes_init(void)
-{
-	unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
-
-	max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
-#ifdef CONFIG_HIGHMEM
-	max_zone_pfn[ZONE_HIGHMEM] = max_pfn;
-#endif
-	free_area_init(max_zone_pfn);
-
-}
-
-/*
- * Map all physical memory under high_memory into kernel's address space.
- *
- * This is explicitly coded for two-level page tables, so if you need
- * something else then this needs to change.
- */
-static void __init map_ram(void)
-{
-	unsigned long v, p, e;
-	pgd_t *pge;
-	p4d_t *p4e;
-	pud_t *pue;
-	pmd_t *pme;
-	pte_t *pte;
-	/* These mark extents of read-only kernel pages...
-	 * ...from vmlinux.lds.S
-	 */
-
-	p = (u32) memblock_start_of_DRAM() & PAGE_MASK;
-	e = min((u32) memblock_end_of_DRAM(), (u32) __pa(high_memory));
-
-	v = (u32) __va(p);
-	pge = pgd_offset_k(v);
-
-	while (p < e) {
-		int j;
-		p4e = p4d_offset(pge, v);
-		pue = pud_offset(p4e, v);
-		pme = pmd_offset(pue, v);
-
-		if ((u32) pue != (u32) pge || (u32) pme != (u32) pge) {
-			panic("%s: Kernel hardcoded for "
-			      "two-level page tables", __func__);
-		}
-
-		/* Alloc one page for holding PTE's... */
-		pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
-		if (!pte)
-			panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
-			      __func__, PAGE_SIZE, PAGE_SIZE);
-		set_pmd(pme, __pmd(__pa(pte) + _PAGE_KERNEL_TABLE));
-
-		/* Fill the newly allocated page with PTE'S */
-		for (j = 0; p < e && j < PTRS_PER_PTE;
-		     v += PAGE_SIZE, p += PAGE_SIZE, j++, pte++) {
-			/* Create mapping between p and v. */
-			/* TODO: more fine grant for page access permission */
-			set_pte(pte, __pte(p + pgprot_val(PAGE_KERNEL)));
-		}
-
-		pge++;
-	}
-}
-static pmd_t *fixmap_pmd_p;
-static void __init fixedrange_init(void)
-{
-	unsigned long vaddr;
-	pmd_t *pmd;
-#ifdef CONFIG_HIGHMEM
-	pte_t *pte;
-#endif /* CONFIG_HIGHMEM */
-
-	/*
-	 * Fixed mappings:
-	 */
-	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1);
-	pmd = pmd_off_k(vaddr);
-	fixmap_pmd_p = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
-	if (!fixmap_pmd_p)
-		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
-		      __func__, PAGE_SIZE, PAGE_SIZE);
-	set_pmd(pmd, __pmd(__pa(fixmap_pmd_p) + _PAGE_KERNEL_TABLE));
-
-#ifdef CONFIG_HIGHMEM
-	/*
-	 * Permanent kmaps:
-	 */
-	vaddr = PKMAP_BASE;
-
-	pmd = pmd_off_k(vaddr);
-	pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
-	if (!pte)
-		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
-		      __func__, PAGE_SIZE, PAGE_SIZE);
-	set_pmd(pmd, __pmd(__pa(pte) + _PAGE_KERNEL_TABLE));
-	pkmap_page_table = pte;
-#endif /* CONFIG_HIGHMEM */
-}
-
-/*
- * paging_init() sets up the page tables, initialises the zone memory
- * maps, and sets up the zero page, bad page and bad page tables.
- */
-void __init paging_init(void)
-{
-	int i;
-	void *zero_page;
-
-	pr_info("Setting up paging and PTEs.\n");
-	/* clear out the init_mm.pgd that will contain the kernel's mappings */
-	for (i = 0; i < PTRS_PER_PGD; i++)
-		swapper_pg_dir[i] = __pgd(1);
-
-	map_ram();
-
-	fixedrange_init();
-
-	/* allocate space for empty_zero_page */
-	zero_page = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
-	if (!zero_page)
-		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
-		      __func__, PAGE_SIZE, PAGE_SIZE);
-	zone_sizes_init();
-
-	empty_zero_page = virt_to_page(zero_page);
-	flush_dcache_page(empty_zero_page);
-}
-
-static inline void __init free_highmem(void)
-{
-#ifdef CONFIG_HIGHMEM
-	unsigned long pfn;
-	for (pfn = PFN_UP(__pa(high_memory)); pfn < max_pfn; pfn++) {
-		phys_addr_t paddr = (phys_addr_t) pfn << PAGE_SHIFT;
-		if (!memblock_is_reserved(paddr))
-			free_highmem_page(pfn_to_page(pfn));
-	}
-#endif
-}
-
-static void __init set_max_mapnr_init(void)
-{
-	max_mapnr = max_pfn;
-}
-
-/*
- * mem_init() marks the free areas in the mem_map and tells us how much
- * memory is free.  This is done after various parts of the system have
- * claimed their memory after the kernel image.
- */
-void __init mem_init(void)
-{
-	phys_addr_t memory_start = memblock_start_of_DRAM();
-	BUG_ON(!mem_map);
-	set_max_mapnr_init();
-
-	free_highmem();
-
-	/* this will put all low memory onto the freelists */
-	memblock_free_all();
-
-	pr_info("virtual kernel memory layout:\n"
-		"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
-#ifdef CONFIG_HIGHMEM
-		"    pkmap   : 0x%08lx - 0x%08lx   (%4ld kB)\n"
-#endif
-		"    consist : 0x%08lx - 0x%08lx   (%4ld MB)\n"
-		"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
-		"    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
-		"      .init : 0x%08lx - 0x%08lx   (%4ld kB)\n"
-		"      .data : 0x%08lx - 0x%08lx   (%4ld kB)\n"
-		"      .text : 0x%08lx - 0x%08lx   (%4ld kB)\n",
-		FIXADDR_START, FIXADDR_TOP, (FIXADDR_TOP - FIXADDR_START) >> 10,
-#ifdef CONFIG_HIGHMEM
-		PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE,
-		(LAST_PKMAP * PAGE_SIZE) >> 10,
-#endif
-		CONSISTENT_BASE, CONSISTENT_END,
-		((CONSISTENT_END) - (CONSISTENT_BASE)) >> 20, VMALLOC_START,
-		(unsigned long)VMALLOC_END, (VMALLOC_END - VMALLOC_START) >> 20,
-		(unsigned long)__va(memory_start), (unsigned long)high_memory,
-		((unsigned long)high_memory -
-		 (unsigned long)__va(memory_start)) >> 20,
-		(unsigned long)&__init_begin, (unsigned long)&__init_end,
-		((unsigned long)&__init_end -
-		 (unsigned long)&__init_begin) >> 10, (unsigned long)&_etext,
-		(unsigned long)&_edata,
-		((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
-		(unsigned long)&_text, (unsigned long)&_etext,
-		((unsigned long)&_etext - (unsigned long)&_text) >> 10);
-
-	/*
-	 * Check boundaries twice: Some fundamental inconsistencies can
-	 * be detected at build time already.
-	 */
-#ifdef CONFIG_HIGHMEM
-	BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > FIXADDR_START);
-	BUILD_BUG_ON((CONSISTENT_END) > PKMAP_BASE);
-#endif
-	BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE);
-	BUILD_BUG_ON(VMALLOC_START >= VMALLOC_END);
-
-#ifdef CONFIG_HIGHMEM
-	BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > FIXADDR_START);
-	BUG_ON(CONSISTENT_END > PKMAP_BASE);
-#endif
-	BUG_ON(VMALLOC_END > CONSISTENT_BASE);
-	BUG_ON(VMALLOC_START >= VMALLOC_END);
-	BUG_ON((unsigned long)high_memory > VMALLOC_START);
-
-	return;
-}
-
-void __set_fixmap(enum fixed_addresses idx,
-			       phys_addr_t phys, pgprot_t flags)
-{
-	unsigned long addr = __fix_to_virt(idx);
-	pte_t *pte;
-
-	BUG_ON(idx <= FIX_HOLE || idx >= __end_of_fixed_addresses);
-
-	pte = (pte_t *)&fixmap_pmd_p[pte_index(addr)];
-
-	if (pgprot_val(flags)) {
-		set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));
-	} else {
-		pte_clear(&init_mm, addr, pte);
-		flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
-	}
-}
diff --git a/arch/nds32/mm/mm-nds32.c b/arch/nds32/mm/mm-nds32.c
deleted file mode 100644
index f2778f2b39f6..000000000000
--- a/arch/nds32/mm/mm-nds32.c
+++ /dev/null
@@ -1,96 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/init_task.h>
-
-#define __HAVE_ARCH_PGD_FREE
-#include <asm/pgalloc.h>
-
-#define FIRST_KERNEL_PGD_NR	(USER_PTRS_PER_PGD)
-
-/*
- * need to get a page for level 1
- */
-
-pgd_t *pgd_alloc(struct mm_struct *mm)
-{
-	pgd_t *new_pgd, *init_pgd;
-	int i;
-
-	new_pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, 0);
-	if (!new_pgd)
-		return NULL;
-	for (i = 0; i < PTRS_PER_PGD; i++) {
-		(*new_pgd) = 1;
-		new_pgd++;
-	}
-	new_pgd -= PTRS_PER_PGD;
-
-	init_pgd = pgd_offset_k(0);
-
-	memcpy(new_pgd + FIRST_KERNEL_PGD_NR, init_pgd + FIRST_KERNEL_PGD_NR,
-	       (PTRS_PER_PGD - FIRST_KERNEL_PGD_NR) * sizeof(pgd_t));
-
-	cpu_dcache_wb_range((unsigned long)new_pgd,
-			    (unsigned long)new_pgd +
-			    PTRS_PER_PGD * sizeof(pgd_t));
-	inc_lruvec_page_state(virt_to_page((unsigned long *)new_pgd),
-			      NR_PAGETABLE);
-
-	return new_pgd;
-}
-
-void pgd_free(struct mm_struct *mm, pgd_t * pgd)
-{
-	pmd_t *pmd;
-	struct page *pte;
-
-	if (!pgd)
-		return;
-
-	pmd = (pmd_t *) pgd;
-	if (pmd_none(*pmd))
-		goto free;
-	if (pmd_bad(*pmd)) {
-		pmd_ERROR(*pmd);
-		pmd_clear(pmd);
-		goto free;
-	}
-
-	pte = pmd_page(*pmd);
-	pmd_clear(pmd);
-	dec_lruvec_page_state(virt_to_page((unsigned long *)pgd), NR_PAGETABLE);
-	pte_free(mm, pte);
-	mm_dec_nr_ptes(mm);
-	pmd_free(mm, pmd);
-free:
-	free_pages((unsigned long)pgd, 0);
-}
-
-/*
- * In order to soft-boot, we need to insert a 1:1 mapping in place of
- * the user-mode pages.  This will then ensure that we have predictable
- * results when turning the mmu off
- */
-void setup_mm_for_reboot(char mode)
-{
-	unsigned long pmdval;
-	pgd_t *pgd;
-	p4d_t *p4d;
-	pud_t *pud;
-	pmd_t *pmd;
-	int i;
-
-	if (current->mm && current->mm->pgd)
-		pgd = current->mm->pgd;
-	else
-		pgd = init_mm.pgd;
-
-	for (i = 0; i < USER_PTRS_PER_PGD; i++) {
-		pmdval = (i << PGDIR_SHIFT);
-		p4d = p4d_offset(pgd, i << PGDIR_SHIFT);
-		pud = pud_offset(p4d, i << PGDIR_SHIFT);
-		pmd = pmd_offset(pud + i, i << PGDIR_SHIFT);
-		set_pmd(pmd, __pmd(pmdval));
-	}
-}
diff --git a/arch/nds32/mm/mmap.c b/arch/nds32/mm/mmap.c
deleted file mode 100644
index 1bdf5e7d1b43..000000000000
--- a/arch/nds32/mm/mmap.c
+++ /dev/null
@@ -1,73 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/sched.h>
-#include <linux/mman.h>
-#include <linux/shm.h>
-
-#define COLOUR_ALIGN(addr,pgoff)		\
-	((((addr)+SHMLBA-1)&~(SHMLBA-1)) +	\
-	 (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
-
-/*
- * We need to ensure that shared mappings are correctly aligned to
- * avoid aliasing issues with VIPT caches.  We need to ensure that
- * a specific page of an object is always mapped at a multiple of
- * SHMLBA bytes.
- *
- * We unconditionally provide this function for all cases, however
- * in the VIVT case, we optimise out the alignment rules.
- */
-unsigned long
-arch_get_unmapped_area(struct file *filp, unsigned long addr,
-		       unsigned long len, unsigned long pgoff,
-		       unsigned long flags)
-{
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma;
-	int do_align = 0;
-	struct vm_unmapped_area_info info;
-	int aliasing = 0;
-	if(IS_ENABLED(CONFIG_CPU_CACHE_ALIASING))
-		aliasing = 1;
-
-	/*
-	 * We only need to do colour alignment if either the I or D
-	 * caches alias.
-	 */
-	if (aliasing)
-		do_align = filp || (flags & MAP_SHARED);
-
-	/*
-	 * We enforce the MAP_FIXED case.
-	 */
-	if (flags & MAP_FIXED) {
-		if (aliasing && flags & MAP_SHARED &&
-		    (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))
-			return -EINVAL;
-		return addr;
-	}
-
-	if (len > TASK_SIZE)
-		return -ENOMEM;
-
-	if (addr) {
-		if (do_align)
-			addr = COLOUR_ALIGN(addr, pgoff);
-		else
-			addr = PAGE_ALIGN(addr);
-
-		vma = find_vma(mm, addr);
-		if (TASK_SIZE - len >= addr &&
-		    (!vma || addr + len <= vm_start_gap(vma)))
-			return addr;
-	}
-
-	info.flags = 0;
-	info.length = len;
-	info.low_limit = mm->mmap_base;
-	info.high_limit = TASK_SIZE;
-	info.align_mask = do_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
-	info.align_offset = pgoff << PAGE_SHIFT;
-	return vm_unmapped_area(&info);
-}
diff --git a/arch/nds32/mm/proc.c b/arch/nds32/mm/proc.c
deleted file mode 100644
index 848c845f5f33..000000000000
--- a/arch/nds32/mm/proc.c
+++ /dev/null
@@ -1,536 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <asm/nds32.h>
-#include <asm/tlbflush.h>
-#include <asm/cacheflush.h>
-#include <asm/l2_cache.h>
-#include <nds32_intrinsic.h>
-
-#include <asm/cache_info.h>
-extern struct cache_info L1_cache_info[2];
-
-int va_kernel_present(unsigned long addr)
-{
-	pmd_t *pmd;
-	pte_t *ptep, pte;
-
-	pmd = pmd_off_k(addr);
-	if (!pmd_none(*pmd)) {
-		ptep = pte_offset_map(pmd, addr);
-		pte = *ptep;
-		if (pte_present(pte))
-			return pte;
-	}
-	return 0;
-}
-
-pte_t va_present(struct mm_struct * mm, unsigned long addr)
-{
-	pgd_t *pgd;
-	p4d_t *p4d;
-	pud_t *pud;
-	pmd_t *pmd;
-	pte_t *ptep, pte;
-
-	pgd = pgd_offset(mm, addr);
-	if (!pgd_none(*pgd)) {
-		p4d = p4d_offset(pgd, addr);
-		if (!p4d_none(*p4d)) {
-			pud = pud_offset(p4d, addr);
-			if (!pud_none(*pud)) {
-				pmd = pmd_offset(pud, addr);
-				if (!pmd_none(*pmd)) {
-					ptep = pte_offset_map(pmd, addr);
-					pte = *ptep;
-					if (pte_present(pte))
-						return pte;
-				}
-			}
-		}
-	}
-	return 0;
-
-}
-
-int va_readable(struct pt_regs *regs, unsigned long addr)
-{
-	struct mm_struct *mm = current->mm;
-	pte_t pte;
-	int ret = 0;
-
-	if (user_mode(regs)) {
-		/* user mode */
-		pte = va_present(mm, addr);
-		if (!pte && pte_read(pte))
-			ret = 1;
-	} else {
-		/* superuser mode is always readable, so we can only
-		 * check it is present or not*/
-		return (! !va_kernel_present(addr));
-	}
-	return ret;
-}
-
-int va_writable(struct pt_regs *regs, unsigned long addr)
-{
-	struct mm_struct *mm = current->mm;
-	pte_t pte;
-	int ret = 0;
-
-	if (user_mode(regs)) {
-		/* user mode */
-		pte = va_present(mm, addr);
-		if (!pte && pte_write(pte))
-			ret = 1;
-	} else {
-		/* superuser mode */
-		pte = va_kernel_present(addr);
-		if (!pte && pte_kernel_write(pte))
-			ret = 1;
-	}
-	return ret;
-}
-
-/*
- * All
- */
-void cpu_icache_inval_all(void)
-{
-	unsigned long end, line_size;
-
-	line_size = L1_cache_info[ICACHE].line_size;
-	end =
-	    line_size * L1_cache_info[ICACHE].ways * L1_cache_info[ICACHE].sets;
-
-	do {
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end));
-	} while (end > 0);
-	__nds32__isb();
-}
-
-void cpu_dcache_inval_all(void)
-{
-	__nds32__cctl_l1d_invalall();
-}
-
-#ifdef CONFIG_CACHE_L2
-void dcache_wb_all_level(void)
-{
-	unsigned long flags, cmd;
-	local_irq_save(flags);
-	__nds32__cctl_l1d_wball_alvl();
-	/* Section 1: Ensure the section 2 & 3 program code execution after */
-	__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
-
-	/* Section 2: Confirm the writeback all level is done in CPU and L2C */
-	cmd = CCTL_CMD_L2_SYNC;
-	L2_CMD_RDY();
-	L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
-	L2_CMD_RDY();
-
-	/* Section 3: Writeback whole L2 cache */
-	cmd = CCTL_ALL_CMD | CCTL_CMD_L2_IX_WB;
-	L2_CMD_RDY();
-	L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
-	L2_CMD_RDY();
-	__nds32__msync_all();
-	local_irq_restore(flags);
-}
-EXPORT_SYMBOL(dcache_wb_all_level);
-#endif
-
-void cpu_dcache_wb_all(void)
-{
-	__nds32__cctl_l1d_wball_one_lvl();
-	__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
-}
-
-void cpu_dcache_wbinval_all(void)
-{
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-	unsigned long flags;
-	local_irq_save(flags);
-#endif
-	cpu_dcache_wb_all();
-	cpu_dcache_inval_all();
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-	local_irq_restore(flags);
-#endif
-}
-
-/*
- * Page
- */
-void cpu_icache_inval_page(unsigned long start)
-{
-	unsigned long line_size, end;
-
-	line_size = L1_cache_info[ICACHE].line_size;
-	end = start + PAGE_SIZE;
-
-	do {
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end));
-	} while (end != start);
-	__nds32__isb();
-}
-
-void cpu_dcache_inval_page(unsigned long start)
-{
-	unsigned long line_size, end;
-
-	line_size = L1_cache_info[DCACHE].line_size;
-	end = start + PAGE_SIZE;
-
-	do {
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
-	} while (end != start);
-}
-
-void cpu_dcache_wb_page(unsigned long start)
-{
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-	unsigned long line_size, end;
-
-	line_size = L1_cache_info[DCACHE].line_size;
-	end = start + PAGE_SIZE;
-
-	do {
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
-		end -= line_size;
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
-	} while (end != start);
-	__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
-#endif
-}
-
-void cpu_dcache_wbinval_page(unsigned long start)
-{
-	unsigned long line_size, end;
-
-	line_size = L1_cache_info[DCACHE].line_size;
-	end = start + PAGE_SIZE;
-
-	do {
-		end -= line_size;
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
-#endif
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
-		end -= line_size;
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
-#endif
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
-		end -= line_size;
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
-#endif
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
-		end -= line_size;
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
-#endif
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
-	} while (end != start);
-	__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
-}
-
-void cpu_cache_wbinval_page(unsigned long page, int flushi)
-{
-	cpu_dcache_wbinval_page(page);
-	if (flushi)
-		cpu_icache_inval_page(page);
-}
-
-/*
- * Range
- */
-void cpu_icache_inval_range(unsigned long start, unsigned long end)
-{
-	unsigned long line_size;
-
-	line_size = L1_cache_info[ICACHE].line_size;
-
-	while (end > start) {
-		__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (start));
-		start += line_size;
-	}
-	__nds32__isb();
-}
-
-void cpu_dcache_inval_range(unsigned long start, unsigned long end)
-{
-	unsigned long line_size;
-
-	line_size = L1_cache_info[DCACHE].line_size;
-
-	while (end > start) {
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (start));
-		start += line_size;
-	}
-}
-
-void cpu_dcache_wb_range(unsigned long start, unsigned long end)
-{
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-	unsigned long line_size;
-
-	line_size = L1_cache_info[DCACHE].line_size;
-
-	while (end > start) {
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (start));
-		start += line_size;
-	}
-	__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
-#endif
-}
-
-void cpu_dcache_wbinval_range(unsigned long start, unsigned long end)
-{
-	unsigned long line_size;
-
-	line_size = L1_cache_info[DCACHE].line_size;
-
-	while (end > start) {
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (start));
-#endif
-		__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (start));
-		start += line_size;
-	}
-	__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
-}
-
-void cpu_cache_wbinval_range(unsigned long start, unsigned long end, int flushi)
-{
-	unsigned long line_size, align_start, align_end;
-
-	line_size = L1_cache_info[DCACHE].line_size;
-	align_start = start & ~(line_size - 1);
-	align_end = (end + line_size - 1) & ~(line_size - 1);
-	cpu_dcache_wbinval_range(align_start, align_end);
-
-	if (flushi) {
-		line_size = L1_cache_info[ICACHE].line_size;
-		align_start = start & ~(line_size - 1);
-		align_end = (end + line_size - 1) & ~(line_size - 1);
-		cpu_icache_inval_range(align_start, align_end);
-	}
-}
-
-void cpu_cache_wbinval_range_check(struct vm_area_struct *vma,
-				   unsigned long start, unsigned long end,
-				   bool flushi, bool wbd)
-{
-	unsigned long line_size, t_start, t_end;
-
-	if (!flushi && !wbd)
-		return;
-	line_size = L1_cache_info[DCACHE].line_size;
-	start = start & ~(line_size - 1);
-	end = (end + line_size - 1) & ~(line_size - 1);
-
-	if ((end - start) > (8 * PAGE_SIZE)) {
-		if (wbd)
-			cpu_dcache_wbinval_all();
-		if (flushi)
-			cpu_icache_inval_all();
-		return;
-	}
-
-	t_start = (start + PAGE_SIZE) & PAGE_MASK;
-	t_end = ((end - 1) & PAGE_MASK);
-
-	if ((start & PAGE_MASK) == t_end) {
-		if (va_present(vma->vm_mm, start)) {
-			if (wbd)
-				cpu_dcache_wbinval_range(start, end);
-			if (flushi)
-				cpu_icache_inval_range(start, end);
-		}
-		return;
-	}
-
-	if (va_present(vma->vm_mm, start)) {
-		if (wbd)
-			cpu_dcache_wbinval_range(start, t_start);
-		if (flushi)
-			cpu_icache_inval_range(start, t_start);
-	}
-
-	if (va_present(vma->vm_mm, end - 1)) {
-		if (wbd)
-			cpu_dcache_wbinval_range(t_end, end);
-		if (flushi)
-			cpu_icache_inval_range(t_end, end);
-	}
-
-	while (t_start < t_end) {
-		if (va_present(vma->vm_mm, t_start)) {
-			if (wbd)
-				cpu_dcache_wbinval_page(t_start);
-			if (flushi)
-				cpu_icache_inval_page(t_start);
-		}
-		t_start += PAGE_SIZE;
-	}
-}
-
-#ifdef CONFIG_CACHE_L2
-static inline void cpu_l2cache_op(unsigned long start, unsigned long end, unsigned long op)
-{
-	if (atl2c_base) {
-		unsigned long p_start = __pa(start);
-		unsigned long p_end = __pa(end);
-		unsigned long cmd;
-		unsigned long line_size;
-		/* TODO Can Use PAGE Mode to optimize if range large than PAGE_SIZE */
-		line_size = L2_CACHE_LINE_SIZE();
-		p_start = p_start & (~(line_size - 1));
-		p_end = (p_end + line_size - 1) & (~(line_size - 1));
-		cmd =
-		    (p_start & ~(line_size - 1)) | op |
-		    CCTL_SINGLE_CMD;
-		do {
-			L2_CMD_RDY();
-			L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
-			cmd += line_size;
-			p_start += line_size;
-		} while (p_end > p_start);
-		cmd = CCTL_CMD_L2_SYNC;
-		L2_CMD_RDY();
-		L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
-		L2_CMD_RDY();
-	}
-}
-#else
-#define cpu_l2cache_op(start,end,op) do { } while (0)
-#endif
-/*
- * DMA
- */
-void cpu_dma_wb_range(unsigned long start, unsigned long end)
-{
-	unsigned long line_size;
-	unsigned long flags;
-	line_size = L1_cache_info[DCACHE].line_size;
-	start = start & (~(line_size - 1));
-	end = (end + line_size - 1) & (~(line_size - 1));
-	if (unlikely(start == end))
-		return;
-
-	local_irq_save(flags);
-	cpu_dcache_wb_range(start, end);
-	cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_WB);
-	__nds32__msync_all();
-	local_irq_restore(flags);
-}
-
-void cpu_dma_inval_range(unsigned long start, unsigned long end)
-{
-	unsigned long line_size;
-	unsigned long old_start = start;
-	unsigned long old_end = end;
-	unsigned long flags;
-	line_size = L1_cache_info[DCACHE].line_size;
-	start = start & (~(line_size - 1));
-	end = (end + line_size - 1) & (~(line_size - 1));
-	if (unlikely(start == end))
-		return;
-	local_irq_save(flags);
-	if (start != old_start) {
-		cpu_dcache_wbinval_range(start, start + line_size);
-		cpu_l2cache_op(start, start + line_size, CCTL_CMD_L2_PA_WBINVAL);
-	}
-	if (end != old_end) {
-		cpu_dcache_wbinval_range(end - line_size, end);
-		cpu_l2cache_op(end - line_size, end, CCTL_CMD_L2_PA_WBINVAL);
-	}
-	cpu_dcache_inval_range(start, end);
-	cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_INVAL);
-	__nds32__msync_all();
-	local_irq_restore(flags);
-
-}
-
-void cpu_dma_wbinval_range(unsigned long start, unsigned long end)
-{
-	unsigned long line_size;
-	unsigned long flags;
-	line_size = L1_cache_info[DCACHE].line_size;
-	start = start & (~(line_size - 1));
-	end = (end + line_size - 1) & (~(line_size - 1));
-	if (unlikely(start == end))
-		return;
-
-	local_irq_save(flags);
-	cpu_dcache_wbinval_range(start, end);
-	cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_WBINVAL);
-	__nds32__msync_all();
-	local_irq_restore(flags);
-}
-
-void cpu_proc_init(void)
-{
-}
-
-void cpu_proc_fin(void)
-{
-}
-
-void cpu_do_idle(void)
-{
-	__nds32__standby_no_wake_grant();
-}
-
-void cpu_reset(unsigned long reset)
-{
-	u32 tmp;
-	GIE_DISABLE();
-	tmp = __nds32__mfsr(NDS32_SR_CACHE_CTL);
-	tmp &= ~(CACHE_CTL_mskIC_EN | CACHE_CTL_mskDC_EN);
-	__nds32__mtsr_isb(tmp, NDS32_SR_CACHE_CTL);
-	cpu_dcache_wbinval_all();
-	cpu_icache_inval_all();
-
-	__asm__ __volatile__("jr.toff %0\n\t"::"r"(reset));
-}
-
-void cpu_switch_mm(struct mm_struct *mm)
-{
-	unsigned long cid;
-	cid = __nds32__mfsr(NDS32_SR_TLB_MISC);
-	cid = (cid & ~TLB_MISC_mskCID) | mm->context.id;
-	__nds32__mtsr_dsb(cid, NDS32_SR_TLB_MISC);
-	__nds32__mtsr_isb(__pa(mm->pgd), NDS32_SR_L1_PPTB);
-}
diff --git a/arch/nds32/mm/tlb.c b/arch/nds32/mm/tlb.c
deleted file mode 100644
index dd41f5e0712f..000000000000
--- a/arch/nds32/mm/tlb.c
+++ /dev/null
@@ -1,50 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/spinlock_types.h>
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <asm/nds32.h>
-#include <nds32_intrinsic.h>
-
-unsigned int cpu_last_cid = { TLB_MISC_mskCID + (2 << TLB_MISC_offCID) };
-
-DEFINE_SPINLOCK(cid_lock);
-
-void local_flush_tlb_range(struct vm_area_struct *vma,
-			   unsigned long start, unsigned long end)
-{
-	unsigned long flags, ocid, ncid;
-
-	if ((end - start) > 0x400000) {
-		__nds32__tlbop_flua();
-		__nds32__isb();
-		return;
-	}
-
-	spin_lock_irqsave(&cid_lock, flags);
-	ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
-	ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
-	__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
-	while (start < end) {
-		__nds32__tlbop_inv(start);
-		__nds32__isb();
-		start += PAGE_SIZE;
-	}
-	__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
-	spin_unlock_irqrestore(&cid_lock, flags);
-}
-
-void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
-{
-	unsigned long flags, ocid, ncid;
-
-	spin_lock_irqsave(&cid_lock, flags);
-	ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
-	ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
-	__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
-	__nds32__tlbop_inv(addr);
-	__nds32__isb();
-	__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
-	spin_unlock_irqrestore(&cid_lock, flags);
-}