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Linux kernel mirror (for testing)
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kernel
os
linux
1/*
2 * include/asm-ppc/tlbflush.h
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9#ifdef __KERNEL__
10#ifndef _PPC_TLBFLUSH_H
11#define _PPC_TLBFLUSH_H
12
13#include <linux/config.h>
14#include <linux/mm.h>
15
16extern void _tlbie(unsigned long address);
17extern void _tlbia(void);
18
19#if defined(CONFIG_4xx)
20
21#ifndef CONFIG_44x
22#define __tlbia() asm volatile ("sync; tlbia; isync" : : : "memory")
23#else
24#define __tlbia _tlbia
25#endif
26
27static inline void flush_tlb_mm(struct mm_struct *mm)
28 { __tlbia(); }
29static inline void flush_tlb_page(struct vm_area_struct *vma,
30 unsigned long vmaddr)
31 { _tlbie(vmaddr); }
32static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
33 unsigned long vmaddr)
34 { _tlbie(vmaddr); }
35static inline void flush_tlb_range(struct vm_area_struct *vma,
36 unsigned long start, unsigned long end)
37 { __tlbia(); }
38static inline void flush_tlb_kernel_range(unsigned long start,
39 unsigned long end)
40 { __tlbia(); }
41
42#elif defined(CONFIG_FSL_BOOKE)
43
44/* TODO: determine if flush_tlb_range & flush_tlb_kernel_range
45 * are best implemented as tlbia vs specific tlbie's */
46
47#define __tlbia() _tlbia()
48
49static inline void flush_tlb_mm(struct mm_struct *mm)
50 { __tlbia(); }
51static inline void flush_tlb_page(struct vm_area_struct *vma,
52 unsigned long vmaddr)
53 { _tlbie(vmaddr); }
54static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
55 unsigned long vmaddr)
56 { _tlbie(vmaddr); }
57static inline void flush_tlb_range(struct vm_area_struct *vma,
58 unsigned long start, unsigned long end)
59 { __tlbia(); }
60static inline void flush_tlb_kernel_range(unsigned long start,
61 unsigned long end)
62 { __tlbia(); }
63
64#elif defined(CONFIG_8xx)
65#define __tlbia() asm volatile ("tlbia; sync" : : : "memory")
66
67static inline void flush_tlb_mm(struct mm_struct *mm)
68 { __tlbia(); }
69static inline void flush_tlb_page(struct vm_area_struct *vma,
70 unsigned long vmaddr)
71 { _tlbie(vmaddr); }
72static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
73 unsigned long vmaddr)
74 { _tlbie(vmaddr); }
75static inline void flush_tlb_range(struct vm_area_struct *vma,
76 unsigned long start, unsigned long end)
77 { __tlbia(); }
78static inline void flush_tlb_kernel_range(unsigned long start,
79 unsigned long end)
80 { __tlbia(); }
81
82#else /* 6xx, 7xx, 7xxx cpus */
83struct mm_struct;
84struct vm_area_struct;
85extern void flush_tlb_mm(struct mm_struct *mm);
86extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
87extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
88extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
89 unsigned long end);
90extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
91#endif
92
93/*
94 * This is called in munmap when we have freed up some page-table
95 * pages. We don't need to do anything here, there's nothing special
96 * about our page-table pages. -- paulus
97 */
98static inline void flush_tlb_pgtables(struct mm_struct *mm,
99 unsigned long start, unsigned long end)
100{
101}
102
103/*
104 * This gets called at the end of handling a page fault, when
105 * the kernel has put a new PTE into the page table for the process.
106 * We use it to ensure coherency between the i-cache and d-cache
107 * for the page which has just been mapped in.
108 * On machines which use an MMU hash table, we use this to put a
109 * corresponding HPTE into the hash table ahead of time, instead of
110 * waiting for the inevitable extra hash-table miss exception.
111 */
112extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
113
114#endif /* _PPC_TLBFLUSH_H */
115#endif /*__KERNEL__ */