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Sam Ravnborgf5e706a2008-07-17 21:55:51 -07001#ifndef _SPARC64_TLB_H
2#define _SPARC64_TLB_H
3
4#include <linux/swap.h>
5#include <linux/pagemap.h>
6#include <asm/pgalloc.h>
7#include <asm/tlbflush.h>
8#include <asm/mmu_context.h>
9
10#define TLB_BATCH_NR 192
11
12/*
13 * For UP we don't need to worry about TLB flush
14 * and page free order so much..
15 */
16#ifdef CONFIG_SMP
17 #define FREE_PTE_NR 506
18 #define tlb_fast_mode(bp) ((bp)->pages_nr == ~0U)
19#else
20 #define FREE_PTE_NR 1
21 #define tlb_fast_mode(bp) 1
22#endif
23
24struct mmu_gather {
25 struct mm_struct *mm;
26 unsigned int pages_nr;
27 unsigned int need_flush;
28 unsigned int fullmm;
29 unsigned int tlb_nr;
30 unsigned long vaddrs[TLB_BATCH_NR];
31 struct page *pages[FREE_PTE_NR];
32};
33
34DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
35
36#ifdef CONFIG_SMP
37extern void smp_flush_tlb_pending(struct mm_struct *,
38 unsigned long, unsigned long *);
39#endif
40
41extern void __flush_tlb_pending(unsigned long, unsigned long, unsigned long *);
42extern void flush_tlb_pending(void);
43
44static inline struct mmu_gather *tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
45{
46 struct mmu_gather *mp = &get_cpu_var(mmu_gathers);
47
48 BUG_ON(mp->tlb_nr);
49
50 mp->mm = mm;
51 mp->pages_nr = num_online_cpus() > 1 ? 0U : ~0U;
52 mp->fullmm = full_mm_flush;
53
54 return mp;
55}
56
57
58static inline void tlb_flush_mmu(struct mmu_gather *mp)
59{
60 if (mp->need_flush) {
61 free_pages_and_swap_cache(mp->pages, mp->pages_nr);
62 mp->pages_nr = 0;
63 mp->need_flush = 0;
64 }
65
66}
67
68#ifdef CONFIG_SMP
69extern void smp_flush_tlb_mm(struct mm_struct *mm);
70#define do_flush_tlb_mm(mm) smp_flush_tlb_mm(mm)
71#else
72#define do_flush_tlb_mm(mm) __flush_tlb_mm(CTX_HWBITS(mm->context), SECONDARY_CONTEXT)
73#endif
74
75static inline void tlb_finish_mmu(struct mmu_gather *mp, unsigned long start, unsigned long end)
76{
77 tlb_flush_mmu(mp);
78
79 if (mp->fullmm)
80 mp->fullmm = 0;
81 else
82 flush_tlb_pending();
83
84 /* keep the page table cache within bounds */
85 check_pgt_cache();
86
87 put_cpu_var(mmu_gathers);
88}
89
90static inline void tlb_remove_page(struct mmu_gather *mp, struct page *page)
91{
92 if (tlb_fast_mode(mp)) {
93 free_page_and_swap_cache(page);
94 return;
95 }
96 mp->need_flush = 1;
97 mp->pages[mp->pages_nr++] = page;
98 if (mp->pages_nr >= FREE_PTE_NR)
99 tlb_flush_mmu(mp);
100}
101
102#define tlb_remove_tlb_entry(mp,ptep,addr) do { } while (0)
103#define pte_free_tlb(mp, ptepage) pte_free((mp)->mm, ptepage)
104#define pmd_free_tlb(mp, pmdp) pmd_free((mp)->mm, pmdp)
105#define pud_free_tlb(tlb,pudp) __pud_free_tlb(tlb,pudp)
106
107#define tlb_migrate_finish(mm) do { } while (0)
108#define tlb_start_vma(tlb, vma) do { } while (0)
109#define tlb_end_vma(tlb, vma) do { } while (0)
110
111#endif /* _SPARC64_TLB_H */