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 /* Flush entire local TLB */ 21 static inline void local_flush_tlb_all(void) 22 { 23 __asm__ __volatile__ ("sfence.vma" : : : "memory"); 24 } 25 26 /* Flush one page from local TLB */ 27 static inline void local_flush_tlb_page(unsigned long addr) 28 { 29 __asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory"); 30 } 31 32 #ifndef CONFIG_SMP 33 34 #define flush_tlb_all() local_flush_tlb_all() 35 #define flush_tlb_page(vma, addr) local_flush_tlb_page(addr) 36 #define flush_tlb_range(vma, start, end) local_flush_tlb_all() 37 38 #else /* CONFIG_SMP */ 39 40 #include <asm/sbi.h> 41 42 #define flush_tlb_all() sbi_remote_sfence_vma(0, 0, -1) 43 #define flush_tlb_page(vma, addr) flush_tlb_range(vma, addr, 0) 44 #define flush_tlb_range(vma, start, end) \ 45 sbi_remote_sfence_vma(0, start, (end) - (start)) 46 47 #endif /* CONFIG_SMP */ 48 49 /* Flush the TLB entries of the specified mm context */ 50 static inline void flush_tlb_mm(struct mm_struct *mm) 51 { 52 flush_tlb_all(); 53 } 54 55 /* Flush a range of kernel pages */ 56 static inline void flush_tlb_kernel_range(unsigned long start, 57 unsigned long end) 58 { 59 flush_tlb_all(); 60 } 61 62 #endif /* CONFIG_MMU */ 63 64 #endif /* _ASM_RISCV_TLBFLUSH_H */ 65