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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 */ |