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