arch/riscv/include/asm/tlbflush.h

   1 /*
   2  * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
   3  * Copyright (C) 2012 Regents of the University of California
   4  *
   5  *   This program is free software; you can redistribute it and/or
   6  *   modify it under the terms of the GNU General Public License
   7  *   as published by the Free Software Foundation, version 2.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  */
  14
  15 #ifndef _ASM_RISCV_TLBFLUSH_H
  16 #define _ASM_RISCV_TLBFLUSH_H
  17
  18 #include <linux/mm_types.h>
  19
  20 /*
  21  * Flush entire local TLB.  'sfence.vma' implicitly fences with the instruction
  22  * cache as well, so a 'fence.i' is not necessary.
  23  */
  24 static inline void local_flush_tlb_all(void)
  25 {
  26         __asm__ __volatile__ ("sfence.vma" : : : "memory");
  27 }
  28
  29 /* Flush one page from local TLB */
  30 static inline void local_flush_tlb_page(unsigned long addr)
  31 {
  32         __asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory");
  33 }
  34
  35 #ifndef CONFIG_SMP
  36
  37 #define flush_tlb_all() local_flush_tlb_all()
  38 #define flush_tlb_page(vma, addr) local_flush_tlb_page(addr)
  39
  40 static 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
  48 #else /* CONFIG_SMP */
  49
  50 #include <asm/sbi.h>
  51
  52 #define flush_tlb_all() sbi_remote_sfence_vma(0, 0, -1)
  53 #define flush_tlb_page(vma, addr) flush_tlb_range(vma, addr, 0)
  54 #define flush_tlb_range(vma, start, end) \
  55         sbi_remote_sfence_vma(mm_cpumask((vma)->vm_mm)->bits, \
  56                               start, (end) - (start))
  57 #define flush_tlb_mm(mm) \
  58         sbi_remote_sfence_vma(mm_cpumask(mm)->bits, 0, -1)
  59
  60 #endif /* CONFIG_SMP */
  61
  62 /* Flush a range of kernel pages */
  63 static inline void flush_tlb_kernel_range(unsigned long start,
  64         unsigned long end)
  65 {
  66         flush_tlb_all();
  67 }
  68
  69 #endif /* _ASM_RISCV_TLBFLUSH_H */