1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * arch/sh/mm/nommu.c
4 *
5 * Various helper routines and stubs for MMUless SH.
6 *
7 * Copyright (C) 2002 - 2009 Paul Mundt
8 */
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/string.h>
12#include <linux/mm.h>
13#include <asm/tlbflush.h>
14#include <asm/page.h>
15#include <linux/uaccess.h>
16
17/*
18 * Nothing too terribly exciting here ..
19 */
20void copy_page(void *to, void *from)
21{
22	memcpy(to, from, PAGE_SIZE);
23}
24
25__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
26{
27	memcpy(to, from, n);
28	return 0;
29}
30
31__kernel_size_t __clear_user(void __user *to, __kernel_size_t n)
32{
33	memset((__force void *)to, 0, n);
34	return 0;
35}
36
37void local_flush_tlb_all(void)
38{
39	BUG();
40}
41
42void local_flush_tlb_mm(struct mm_struct *mm)
43{
44	BUG();
45}
46
47void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
48			    unsigned long end)
49{
50	BUG();
51}
52
53void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
54{
55	BUG();
56}
57
58void local_flush_tlb_one(unsigned long asid, unsigned long page)
59{
60	BUG();
61}
62
63void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
64{
65	BUG();
66}
67
68void __flush_tlb_global(void)
69{
70}
71
72void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
73{
74}
75
76void __init kmap_coherent_init(void)
77{
78}
79
80void *kmap_coherent(struct page *page, unsigned long addr)
81{
82	BUG();
83	return NULL;
84}
85
86void kunmap_coherent(void *kvaddr)
87{
88	BUG();
89}
90
91void __init page_table_range_init(unsigned long start, unsigned long end,
92				  pgd_t *pgd_base)
93{
94}
95
96void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
97{
98}
99