| /* |
| * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com> |
| * Copyright (C) 2012 Regents of the University of California |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation, version 2. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #ifndef _ASM_RISCV_TLBFLUSH_H |
| #define _ASM_RISCV_TLBFLUSH_H |
| |
| #include <linux/mm_types.h> |
| |
| /* |
| * Flush entire local TLB. 'sfence.vma' implicitly fences with the instruction |
| * cache as well, so a 'fence.i' is not necessary. |
| */ |
| static inline void local_flush_tlb_all(void) |
| { |
| __asm__ __volatile__ ("sfence.vma" : : : "memory"); |
| } |
| |
| /* Flush one page from local TLB */ |
| static inline void local_flush_tlb_page(unsigned long addr) |
| { |
| __asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory"); |
| } |
| |
| #ifndef CONFIG_SMP |
| |
| #define flush_tlb_all() local_flush_tlb_all() |
| #define flush_tlb_page(vma, addr) local_flush_tlb_page(addr) |
| #define flush_tlb_range(vma, start, end) local_flush_tlb_all() |
| |
| #else /* CONFIG_SMP */ |
| |
| #include <asm/sbi.h> |
| |
| #define flush_tlb_all() sbi_remote_sfence_vma(0, 0, -1) |
| #define flush_tlb_page(vma, addr) flush_tlb_range(vma, addr, 0) |
| #define flush_tlb_range(vma, start, end) \ |
| sbi_remote_sfence_vma(0, start, (end) - (start)) |
| |
| #endif /* CONFIG_SMP */ |
| |
| /* Flush the TLB entries of the specified mm context */ |
| static inline void flush_tlb_mm(struct mm_struct *mm) |
| { |
| flush_tlb_all(); |
| } |
| |
| /* Flush a range of kernel pages */ |
| static inline void flush_tlb_kernel_range(unsigned long start, |
| unsigned long end) |
| { |
| flush_tlb_all(); |
| } |
| |
| #endif /* _ASM_RISCV_TLBFLUSH_H */ |