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/*
  2 * arch/sh/mm/nommu.c
  3 *
  4 * Various helper routines and stubs for MMUless SH.
  5 *
  6 * Copyright (C) 2002 - 2009 Paul Mundt
  7 *
  8 * Released under the terms of the GNU GPL v2.0.
  9 */
 10#include <linux/kernel.h>
 11#include <linux/init.h>
 12#include <linux/string.h>
 13#include <linux/mm.h>
 14#include <asm/pgtable.h>
 15#include <asm/tlbflush.h>
 16#include <asm/page.h>
 17#include <linux/uaccess.h>
 18
 19/*
 20 * Nothing too terribly exciting here ..
 21 */
 22void copy_page(void *to, void *from)
 23{
 24	memcpy(to, from, PAGE_SIZE);
 25}
 26
 27__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
 28{
 29	memcpy(to, from, n);
 30	return 0;
 31}
 32
 33__kernel_size_t __clear_user(void *to, __kernel_size_t n)
 34{
 35	memset(to, 0, n);
 36	return 0;
 37}
 38
 39void local_flush_tlb_all(void)
 40{
 41	BUG();
 42}
 43
 44void local_flush_tlb_mm(struct mm_struct *mm)
 45{
 46	BUG();
 47}
 48
 49void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
 50			    unsigned long end)
 51{
 52	BUG();
 53}
 54
 55void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
 56{
 57	BUG();
 58}
 59
 60void local_flush_tlb_one(unsigned long asid, unsigned long page)
 61{
 62	BUG();
 63}
 64
 65void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
 66{
 67	BUG();
 68}
 69
 70void __flush_tlb_global(void)
 71{
 72}
 73
 74void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
 75{
 76}
 77
 78void __init kmap_coherent_init(void)
 79{
 80}
 81
 82void *kmap_coherent(struct page *page, unsigned long addr)
 83{
 84	BUG();
 85	return NULL;
 86}
 87
 88void kunmap_coherent(void *kvaddr)
 89{
 90	BUG();
 91}
 92
 93void __init page_table_range_init(unsigned long start, unsigned long end,
 94				  pgd_t *pgd_base)
 95{
 96}
 97
 98void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
 99{
100}
101
102void pgtable_cache_init(void)
103{
104}