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 #ifdef CONFIG_MMU 19 20 #include <linux/mm_types.h> 21 22 /* 23 * Flush entire local TLB. 'sfence.vma' implicitly fences with the instruction 24 * cache as well, so a 'fence.i' is not necessary. 25 */ 26 static inline void local_flush_tlb_all(void) 27 { 28 __asm__ __volatile__ ("sfence.vma" : : : "memory"); 29 } 30 31 /* Flush one page from local TLB */ 32 static inline void local_flush_tlb_page(unsigned long addr) 33 { 34 __asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory"); 35 } 36 37 #ifndef CONFIG_SMP 38 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() 42 43 #else /* CONFIG_SMP */ 44 45 #include <asm/sbi.h> 46 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)) 51 52 #endif /* CONFIG_SMP */ 53 54 /* Flush the TLB entries of the specified mm context */ 55 static inline void flush_tlb_mm(struct mm_struct *mm) 56 { 57 flush_tlb_all(); 58 } 59 60 /* Flush a range of kernel pages */ 61 static inline void flush_tlb_kernel_range(unsigned long start, 62 unsigned long end) 63 { 64 flush_tlb_all(); 65 } 66 67 #endif /* CONFIG_MMU */ 68 69 #endif /* _ASM_RISCV_TLBFLUSH_H */ 70