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 <asm/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 __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte) 71{ 72} 73 74void __init kmap_coherent_init(void) 75{ 76} 77 78void *kmap_coherent(struct page *page, unsigned long addr) 79{ 80 BUG(); 81 return NULL; 82} 83 84void kunmap_coherent(void *kvaddr) 85{ 86 BUG(); 87} 88 89void __init page_table_range_init(unsigned long start, unsigned long end, 90 pgd_t *pgd_base) 91{ 92} 93 94void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot) 95{ 96} 97 98void pgtable_cache_init(void) 99{ 100} 101