Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ALPHA_TLBFLUSH_H
3#define _ALPHA_TLBFLUSH_H
4
5#include <linux/mm.h>
6#include <linux/sched.h>
7#include <asm/compiler.h>
8
9#ifndef __EXTERN_INLINE
10#define __EXTERN_INLINE extern inline
11#define __MMU_EXTERN_INLINE
12#endif
13
14extern void __load_new_mm_context(struct mm_struct *);
15
16
17__EXTERN_INLINE void
18ev5_flush_tlb_current(struct mm_struct *mm)
19{
20 __load_new_mm_context(mm);
21}
22
23/* Flush just one page in the current TLB set. We need to be very
24 careful about the icache here, there is no way to invalidate a
25 specific icache page. */
26
27__EXTERN_INLINE void
28ev5_flush_tlb_current_page(struct mm_struct * mm,
29 struct vm_area_struct *vma,
30 unsigned long addr)
31{
32 if (vma->vm_flags & VM_EXEC)
33 __load_new_mm_context(mm);
34 else
35 tbi(2, addr);
36}
37
38
39#define flush_tlb_current ev5_flush_tlb_current
40#define flush_tlb_current_page ev5_flush_tlb_current_page
41
42#ifdef __MMU_EXTERN_INLINE
43#undef __EXTERN_INLINE
44#undef __MMU_EXTERN_INLINE
45#endif
46
47/* Flush current user mapping. */
48static inline void
49flush_tlb(void)
50{
51 flush_tlb_current(current->active_mm);
52}
53
54/* Flush someone else's user mapping. */
55static inline void
56flush_tlb_other(struct mm_struct *mm)
57{
58 unsigned long *mmc = &mm->context[smp_processor_id()];
59 /* Check it's not zero first to avoid cacheline ping pong
60 when possible. */
61 if (*mmc) *mmc = 0;
62}
63
64#ifndef CONFIG_SMP
65/* Flush everything (kernel mapping may also have changed
66 due to vmalloc/vfree). */
67static inline void flush_tlb_all(void)
68{
69 tbia();
70}
71
72/* Flush a specified user mapping. */
73static inline void
74flush_tlb_mm(struct mm_struct *mm)
75{
76 if (mm == current->active_mm)
77 flush_tlb_current(mm);
78 else
79 flush_tlb_other(mm);
80}
81
82/* Page-granular tlb flush. */
83static inline void
84flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
85{
86 struct mm_struct *mm = vma->vm_mm;
87
88 if (mm == current->active_mm)
89 flush_tlb_current_page(mm, vma, addr);
90 else
91 flush_tlb_other(mm);
92}
93
94/* Flush a specified range of user mapping. On the Alpha we flush
95 the whole user tlb. */
96static inline void
97flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
98 unsigned long end)
99{
100 flush_tlb_mm(vma->vm_mm);
101}
102
103#else /* CONFIG_SMP */
104
105extern void flush_tlb_all(void);
106extern void flush_tlb_mm(struct mm_struct *);
107extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
108extern void flush_tlb_range(struct vm_area_struct *, unsigned long,
109 unsigned long);
110
111#endif /* CONFIG_SMP */
112
113static inline void flush_tlb_kernel_range(unsigned long start,
114 unsigned long end)
115{
116 flush_tlb_all();
117}
118
119#endif /* _ALPHA_TLBFLUSH_H */