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/pgtable.h>
14#include <asm/tlbflush.h>
15#include <asm/page.h>
16#include <linux/uaccess.h>
17
18/*
19 * Nothing too terribly exciting here ..
20 */
21void copy_page(void *to, void *from)
22{
23	memcpy(to, from, PAGE_SIZE);
24}
25
26__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
27{
28	memcpy(to, from, n);
29	return 0;
30}
31
32__kernel_size_t __clear_user(void *to, __kernel_size_t n)
33{
34	memset(to, 0, n);
35	return 0;
36}
37
38void local_flush_tlb_all(void)
39{
40	BUG();
41}
42
43void local_flush_tlb_mm(struct mm_struct *mm)
44{
45	BUG();
46}
47
48void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
49			    unsigned long end)
50{
51	BUG();
52}
53
54void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
55{
56	BUG();
57}
58
59void local_flush_tlb_one(unsigned long asid, unsigned long page)
60{
61	BUG();
62}
63
64void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
65{
66	BUG();
67}
68
69void __flush_tlb_global(void)
70{
71}
72
73void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
74{
75}
76
77void __init kmap_coherent_init(void)
78{
79}
80
81void *kmap_coherent(struct page *page, unsigned long addr)
82{
83	BUG();
84	return NULL;
85}
86
87void kunmap_coherent(void *kvaddr)
88{
89	BUG();
90}
91
92void __init page_table_range_init(unsigned long start, unsigned long end,
93				  pgd_t *pgd_base)
94{
95}
96
97void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
98{
99}

 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 *to, __kernel_size_t n)
32{
33	memset(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}