LXR linux/arch/riscv/include/asm/tlbflush.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
   4 * Copyright (C) 2012 Regents of the University of California
   5 */
   6
   7#ifndef _ASM_RISCV_TLBFLUSH_H
   8#define _ASM_RISCV_TLBFLUSH_H
   9
  10#include <linux/mm_types.h>
  11#include <asm/smp.h>
  12
  13#ifdef CONFIG_MMU
  14static inline void local_flush_tlb_all(void)
  15{
  16        __asm__ __volatile__ ("sfence.vma" : : : "memory");
  17}
  18
  19/* Flush one page from local TLB */
  20static inline void local_flush_tlb_page(unsigned long addr)
  21{
  22        __asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory");
  23}
  24#else /* CONFIG_MMU */
  25#define local_flush_tlb_all()                   do { } while (0)
  26#define local_flush_tlb_page(addr)              do { } while (0)
  27#endif /* CONFIG_MMU */
  28
  29#if defined(CONFIG_SMP) && defined(CONFIG_MMU)
  30void flush_tlb_all(void);
  31void flush_tlb_mm(struct mm_struct *mm);
  32void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
  33void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
  34                     unsigned long end);
  35#else /* CONFIG_SMP && CONFIG_MMU */
  36
  37#define flush_tlb_all() local_flush_tlb_all()
  38#define flush_tlb_page(vma, addr) local_flush_tlb_page(addr)
  39
  40static inline void flush_tlb_range(struct vm_area_struct *vma,
  41                unsigned long start, unsigned long end)
  42{
  43        local_flush_tlb_all();
  44}
  45
  46#define flush_tlb_mm(mm) flush_tlb_all()
  47#endif /* !CONFIG_SMP || !CONFIG_MMU */
  48
  49/* Flush a range of kernel pages */
  50static inline void flush_tlb_kernel_range(unsigned long start,
  51        unsigned long end)
  52{
  53        flush_tlb_all();
  54}
  55
  56#endif /* _ASM_RISCV_TLBFLUSH_H */
  57