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-rw-r--r--include/asm-powerpc/tlb.h70
-rw-r--r--include/asm-powerpc/tlbflush.h146
2 files changed, 216 insertions, 0 deletions
diff --git a/include/asm-powerpc/tlb.h b/include/asm-powerpc/tlb.h
new file mode 100644
index 000000000000..56659f121779
--- /dev/null
+++ b/include/asm-powerpc/tlb.h
@@ -0,0 +1,70 @@
1/*
2 * TLB shootdown specifics for powerpc
3 *
4 * Copyright (C) 2002 Anton Blanchard, IBM Corp.
5 * Copyright (C) 2002 Paul Mackerras, IBM Corp.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12#ifndef _ASM_POWERPC_TLB_H
13#define _ASM_POWERPC_TLB_H
14
15#include <linux/config.h>
16#ifndef __powerpc64__
17#include <asm/pgtable.h>
18#endif
19#include <asm/pgalloc.h>
20#include <asm/tlbflush.h>
21#ifndef __powerpc64__
22#include <asm/page.h>
23#include <asm/mmu.h>
24#endif
25
26struct mmu_gather;
27
28#define tlb_start_vma(tlb, vma) do { } while (0)
29#define tlb_end_vma(tlb, vma) do { } while (0)
30
31#if !defined(CONFIG_PPC_STD_MMU)
32
33#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
34
35#elif defined(__powerpc64__)
36
37extern void pte_free_finish(void);
38
39static inline void tlb_flush(struct mmu_gather *tlb)
40{
41 flush_tlb_pending();
42 pte_free_finish();
43}
44
45#else
46
47extern void tlb_flush(struct mmu_gather *tlb);
48
49#endif
50
51/* Get the generic bits... */
52#include <asm-generic/tlb.h>
53
54#if !defined(CONFIG_PPC_STD_MMU) || defined(__powerpc64__)
55
56#define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0)
57
58#else
59extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
60 unsigned long address);
61
62static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
63 unsigned long address)
64{
65 if (pte_val(*ptep) & _PAGE_HASHPTE)
66 flush_hash_entry(tlb->mm, ptep, address);
67}
68
69#endif
70#endif /* __ASM_POWERPC_TLB_H */
diff --git a/include/asm-powerpc/tlbflush.h b/include/asm-powerpc/tlbflush.h
new file mode 100644
index 000000000000..ca3655672bbc
--- /dev/null
+++ b/include/asm-powerpc/tlbflush.h
@@ -0,0 +1,146 @@
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#include <linux/config.h>
21
22struct mm_struct;
23
24#ifdef CONFIG_PPC64
25
26#include <linux/percpu.h>
27#include <asm/page.h>
28
29#define PPC64_TLB_BATCH_NR 192
30
31struct ppc64_tlb_batch {
32 unsigned long index;
33 struct mm_struct *mm;
34 pte_t pte[PPC64_TLB_BATCH_NR];
35 unsigned long vaddr[PPC64_TLB_BATCH_NR];
36 unsigned int large;
37};
38DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
39
40extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
41
42static inline void flush_tlb_pending(void)
43{
44 struct ppc64_tlb_batch *batch = &get_cpu_var(ppc64_tlb_batch);
45
46 if (batch->index)
47 __flush_tlb_pending(batch);
48 put_cpu_var(ppc64_tlb_batch);
49}
50
51extern void flush_hash_page(unsigned long va, pte_t pte, int local);
52void 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 */
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