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Linux kernel mirror (for testing)
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kernel
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linux
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#ifdef __KERNEL__
15
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
26#include <linux/pagemap.h>
27
28struct mmu_gather;
29
30#define tlb_start_vma(tlb, vma) do { } while (0)
31#define tlb_end_vma(tlb, vma) do { } while (0)
32
33#if !defined(CONFIG_PPC_STD_MMU)
34
35#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
36
37#elif defined(__powerpc64__)
38
39extern void pte_free_finish(void);
40
41static inline void tlb_flush(struct mmu_gather *tlb)
42{
43 struct ppc64_tlb_batch *tlbbatch = &__get_cpu_var(ppc64_tlb_batch);
44
45 /* If there's a TLB batch pending, then we must flush it because the
46 * pages are going to be freed and we really don't want to have a CPU
47 * access a freed page because it has a stale TLB
48 */
49 if (tlbbatch->index)
50 __flush_tlb_pending(tlbbatch);
51
52 pte_free_finish();
53}
54
55#else
56
57extern void tlb_flush(struct mmu_gather *tlb);
58
59#endif
60
61/* Get the generic bits... */
62#include <asm-generic/tlb.h>
63
64#if !defined(CONFIG_PPC_STD_MMU) || defined(__powerpc64__)
65
66#define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0)
67
68#else
69extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
70 unsigned long address);
71
72static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
73 unsigned long address)
74{
75 if (pte_val(*ptep) & _PAGE_HASHPTE)
76 flush_hash_entry(tlb->mm, ptep, address);
77}
78
79#endif
80#endif /* __KERNEL__ */
81#endif /* __ASM_POWERPC_TLB_H */