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 */
copy_page(void * to,void * from)20 void copy_page(void *to, void *from)
21 {
22 memcpy(to, from, PAGE_SIZE);
23 }
24
__copy_user(void * to,const void * from,__kernel_size_t n)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
__clear_user(void __user * to,__kernel_size_t n)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
local_flush_tlb_all(void)37 void local_flush_tlb_all(void)
38 {
39 BUG();
40 }
41
local_flush_tlb_mm(struct mm_struct * mm)42 void local_flush_tlb_mm(struct mm_struct *mm)
43 {
44 BUG();
45 }
46
local_flush_tlb_range(struct vm_area_struct * vma,unsigned long start,unsigned long end)47 void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
48 unsigned long end)
49 {
50 BUG();
51 }
52
local_flush_tlb_page(struct vm_area_struct * vma,unsigned long page)53 void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
54 {
55 BUG();
56 }
57
local_flush_tlb_one(unsigned long asid,unsigned long page)58 void local_flush_tlb_one(unsigned long asid, unsigned long page)
59 {
60 BUG();
61 }
62
local_flush_tlb_kernel_range(unsigned long start,unsigned long end)63 void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
64 {
65 BUG();
66 }
67
__flush_tlb_global(void)68 void __flush_tlb_global(void)
69 {
70 }
71
__update_tlb(struct vm_area_struct * vma,unsigned long address,pte_t pte)72 void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
73 {
74 }
75
kmap_coherent_init(void)76 void __init kmap_coherent_init(void)
77 {
78 }
79
kmap_coherent(struct page * page,unsigned long addr)80 void *kmap_coherent(struct page *page, unsigned long addr)
81 {
82 BUG();
83 return NULL;
84 }
85
kunmap_coherent(void * kvaddr)86 void kunmap_coherent(void *kvaddr)
87 {
88 BUG();
89 }
90
page_table_range_init(unsigned long start,unsigned long end,pgd_t * pgd_base)91 void __init page_table_range_init(unsigned long start, unsigned long end,
92 pgd_t *pgd_base)
93 {
94 }
95
__set_fixmap(enum fixed_addresses idx,unsigned long phys,pgprot_t prot)96 void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
97 {
98 }
99