projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fab957c1 PD |
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 | ||
| 08f051ed AW |
20 | #include <linux/mm_types.h> |
| 21 | ||
| c901e45a PD |
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 | */ | |
| fab957c1 PD |
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 */ |