1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
4 * Copyright (C) 2012 Regents of the University of California
5 */
6
7 #ifndef _ASM_RISCV_TLBFLUSH_H
8 #define _ASM_RISCV_TLBFLUSH_H
9
10 #include <linux/mm_types.h>
11 #include <asm/smp.h>
12 #include <asm/errata_list.h>
13
14 #define FLUSH_TLB_MAX_SIZE ((unsigned long)-1)
15 #define FLUSH_TLB_NO_ASID ((unsigned long)-1)
16
17 #ifdef CONFIG_MMU
18 extern unsigned long asid_mask;
19
local_flush_tlb_all(void)20 static inline void local_flush_tlb_all(void)
21 {
22 __asm__ __volatile__ ("sfence.vma" : : : "memory");
23 }
24
25 /* Flush one page from local TLB */
local_flush_tlb_page(unsigned long addr)26 static inline void local_flush_tlb_page(unsigned long addr)
27 {
28 ALT_FLUSH_TLB_PAGE(__asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory"));
29 }
30 #else /* CONFIG_MMU */
31 #define local_flush_tlb_all() do { } while (0)
32 #define local_flush_tlb_page(addr) do { } while (0)
33 #endif /* CONFIG_MMU */
34
35 #if defined(CONFIG_SMP) && defined(CONFIG_MMU)
36 void flush_tlb_all(void);
37 void flush_tlb_mm(struct mm_struct *mm);
38 void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
39 unsigned long end, unsigned int page_size);
40 void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
41 void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
42 unsigned long end);
43 void flush_tlb_kernel_range(unsigned long start, unsigned long end);
44 void local_flush_tlb_kernel_range(unsigned long start, unsigned long end);
45 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
46 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
47 void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
48 unsigned long end);
49 #endif
50 #else /* CONFIG_SMP && CONFIG_MMU */
51
52 #define flush_tlb_all() local_flush_tlb_all()
53 #define flush_tlb_page(vma, addr) local_flush_tlb_page(addr)
54
flush_tlb_range(struct vm_area_struct * vma,unsigned long start,unsigned long end)55 static inline void flush_tlb_range(struct vm_area_struct *vma,
56 unsigned long start, unsigned long end)
57 {
58 local_flush_tlb_all();
59 }
60
61 /* Flush a range of kernel pages */
flush_tlb_kernel_range(unsigned long start,unsigned long end)62 static inline void flush_tlb_kernel_range(unsigned long start,
63 unsigned long end)
64 {
65 local_flush_tlb_all();
66 }
67
68 #define flush_tlb_mm(mm) flush_tlb_all()
69 #define flush_tlb_mm_range(mm, start, end, page_size) flush_tlb_all()
70 #define local_flush_tlb_kernel_range(start, end) flush_tlb_all()
71 #endif /* !CONFIG_SMP || !CONFIG_MMU */
72
73 #endif /* _ASM_RISCV_TLBFLUSH_H */
74