cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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nommu.c (1643B)

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