tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
fork
Configure Feed
Select the types of activity you want to include in your feed.
1#ifndef _ASM_POWERPC_TLBFLUSH_H
2#define _ASM_POWERPC_TLBFLUSH_H
3/*
4 * TLB flushing:
5 *
6 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
7 * - flush_tlb_page(vma, vmaddr) flushes one page
8 * - flush_tlb_page_nohash(vma, vmaddr) flushes one page if SW loaded TLB
9 * - flush_tlb_range(vma, start, end) flushes a range of pages
10 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
11 * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 */
18#ifdef __KERNEL__
19
20
21struct mm_struct;
22
23#ifdef CONFIG_PPC64
24
25#include <linux/percpu.h>
26#include <asm/page.h>
27
28#define PPC64_TLB_BATCH_NR 192
29
30struct ppc64_tlb_batch {
31 unsigned long index;
32 struct mm_struct *mm;
33 real_pte_t pte[PPC64_TLB_BATCH_NR];
34 unsigned long vaddr[PPC64_TLB_BATCH_NR];
35 unsigned int psize;
36};
37DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
38
39extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
40
41static inline void flush_tlb_pending(void)
42{
43 struct ppc64_tlb_batch *batch = &get_cpu_var(ppc64_tlb_batch);
44
45 if (batch->index)
46 __flush_tlb_pending(batch);
47 put_cpu_var(ppc64_tlb_batch);
48}
49
50extern void flush_hash_page(unsigned long va, real_pte_t pte, int psize,
51 int local);
52extern void flush_hash_range(unsigned long number, int local);
53
54#else /* CONFIG_PPC64 */
55
56#include <linux/mm.h>
57
58extern void _tlbie(unsigned long address);
59extern void _tlbia(void);
60
61/*
62 * TODO: (CONFIG_FSL_BOOKE) determine if flush_tlb_range &
63 * flush_tlb_kernel_range are best implemented as tlbia vs
64 * specific tlbie's
65 */
66
67#if (defined(CONFIG_4xx) && !defined(CONFIG_44x)) || defined(CONFIG_8xx)
68#define flush_tlb_pending() asm volatile ("tlbia; sync" : : : "memory")
69#elif defined(CONFIG_4xx) || defined(CONFIG_FSL_BOOKE)
70#define flush_tlb_pending() _tlbia()
71#endif
72
73/*
74 * This gets called at the end of handling a page fault, when
75 * the kernel has put a new PTE into the page table for the process.
76 * We use it to ensure coherency between the i-cache and d-cache
77 * for the page which has just been mapped in.
78 * On machines which use an MMU hash table, we use this to put a
79 * corresponding HPTE into the hash table ahead of time, instead of
80 * waiting for the inevitable extra hash-table miss exception.
81 */
82extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
83
84#endif /* CONFIG_PPC64 */
85
86#if defined(CONFIG_PPC64) || defined(CONFIG_4xx) || \
87 defined(CONFIG_FSL_BOOKE) || defined(CONFIG_8xx)
88
89static inline void flush_tlb_mm(struct mm_struct *mm)
90{
91 flush_tlb_pending();
92}
93
94static inline void flush_tlb_page(struct vm_area_struct *vma,
95 unsigned long vmaddr)
96{
97#ifdef CONFIG_PPC64
98 flush_tlb_pending();
99#else
100 _tlbie(vmaddr);
101#endif
102}
103
104static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
105 unsigned long vmaddr)
106{
107#ifndef CONFIG_PPC64
108 _tlbie(vmaddr);
109#endif
110}
111
112static inline void flush_tlb_range(struct vm_area_struct *vma,
113 unsigned long start, unsigned long end)
114{
115 flush_tlb_pending();
116}
117
118static inline void flush_tlb_kernel_range(unsigned long start,
119 unsigned long end)
120{
121 flush_tlb_pending();
122}
123
124#else /* 6xx, 7xx, 7xxx cpus */
125
126extern void flush_tlb_mm(struct mm_struct *mm);
127extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
128extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
129extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
130 unsigned long end);
131extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
132
133#endif
134
135/*
136 * This is called in munmap when we have freed up some page-table
137 * pages. We don't need to do anything here, there's nothing special
138 * about our page-table pages. -- paulus
139 */
140static inline void flush_tlb_pgtables(struct mm_struct *mm,
141 unsigned long start, unsigned long end)
142{
143}
144
145#endif /*__KERNEL__ */
146#endif /* _ASM_POWERPC_TLBFLUSH_H */