| 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 | |
| 14 | #include <asm/cacheflush.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 | */ |
| 22 | void 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 __user *to, __kernel_size_t n) |
| 34 | { |
| 35 | memset((__force void *)to, 0, n); |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | void local_flush_tlb_all(void) |
| 40 | { |
| 41 | BUG(); |
| 42 | } |
| 43 | |
| 44 | void local_flush_tlb_mm(struct mm_struct *mm) |
| 45 | { |
| 46 | BUG(); |
| 47 | } |
| 48 | |
| 49 | void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, |
| 50 | unsigned long end) |
| 51 | { |
| 52 | BUG(); |
| 53 | } |
| 54 | |
| 55 | void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) |
| 56 | { |
| 57 | BUG(); |
| 58 | } |
| 59 | |
| 60 | void local_flush_tlb_one(unsigned long asid, unsigned long page) |
| 61 | { |
| 62 | BUG(); |
| 63 | } |
| 64 | |
| 65 | void local_flush_tlb_kernel_range(unsigned long start, unsigned long end) |
| 66 | { |
| 67 | BUG(); |
| 68 | } |
| 69 | |
| 70 | void __flush_tlb_global(void) |
| 71 | { |
| 72 | } |
| 73 | |
| 74 | void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte) |
| 75 | { |
| 76 | } |
| 77 | |
| 78 | void __init kmap_coherent_init(void) |
| 79 | { |
| 80 | } |
| 81 | |
| 82 | void *kmap_coherent(struct page *page, unsigned long addr) |
| 83 | { |
| 84 | BUG(); |
| 85 | return NULL; |
| 86 | } |
| 87 | |
| 88 | void kunmap_coherent(void *kvaddr) |
| 89 | { |
| 90 | BUG(); |
| 91 | } |
| 92 | |
| 93 | void __init page_table_range_init(unsigned long start, unsigned long end, |
| 94 | pgd_t *pgd_base) |
| 95 | { |
| 96 | } |
| 97 | |
| 98 | void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot) |
| 99 | { |
| 100 | } |