2 * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
3 * Copyright (C) 2012 Regents of the University of California
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.
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.
15 #ifndef _ASM_RISCV_TLBFLUSH_H
16 #define _ASM_RISCV_TLBFLUSH_H
20 #include <linux/mm_types.h>
23 * Flush entire local TLB. 'sfence.vma' implicitly fences with the instruction
24 * cache as well, so a 'fence.i' is not necessary.
26 static inline void local_flush_tlb_all(void)
28 __asm__ __volatile__ ("sfence.vma" : : : "memory");
31 /* Flush one page from local TLB */
32 static inline void local_flush_tlb_page(unsigned long addr)
34 __asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory");
39 #define flush_tlb_all() local_flush_tlb_all()
40 #define flush_tlb_page(vma, addr) local_flush_tlb_page(addr)
41 #define flush_tlb_range(vma, start, end) local_flush_tlb_all()
43 #else /* CONFIG_SMP */
47 #define flush_tlb_all() sbi_remote_sfence_vma(0, 0, -1)
48 #define flush_tlb_page(vma, addr) flush_tlb_range(vma, addr, 0)
49 #define flush_tlb_range(vma, start, end) \
50 sbi_remote_sfence_vma(0, start, (end) - (start))
52 #endif /* CONFIG_SMP */
54 /* Flush the TLB entries of the specified mm context */
55 static inline void flush_tlb_mm(struct mm_struct *mm)
60 /* Flush a range of kernel pages */
61 static inline void flush_tlb_kernel_range(unsigned long start,
67 #endif /* CONFIG_MMU */
69 #endif /* _ASM_RISCV_TLBFLUSH_H */