[PATCH] Kexec / Kdump: Unify elf note code
[linux-2.6.git] / include / asm-arm26 / tlb.h
1 #ifndef __ASMARM_TLB_H
2 #define __ASMARM_TLB_H
3
4 #include <asm/pgalloc.h>
5 #include <asm/tlbflush.h>
6
7 /*
8  * TLB handling.  This allows us to remove pages from the page
9  * tables, and efficiently handle the TLB issues.
10  */
11 struct mmu_gather {
12         struct mm_struct        *mm;
13         unsigned int            need_flush;
14         unsigned int            fullmm;
15 };
16
17 DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
18
19 static inline struct mmu_gather *
20 tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
21 {
22         struct mmu_gather *tlb = &get_cpu_var(mmu_gathers);
23
24         tlb->mm = mm;
25         tlb->need_flush = 0;
26         tlb->fullmm = full_mm_flush;
27
28         return tlb;
29 }
30
31 static inline void
32 tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
33 {
34         if (tlb->need_flush)
35                 flush_tlb_mm(tlb->mm);
36
37         /* keep the page table cache within bounds */
38         check_pgt_cache();
39
40         put_cpu_var(mmu_gathers);
41 }
42
43 #define tlb_remove_tlb_entry(tlb,ptep,address)  do { } while (0)
44 //#define tlb_start_vma(tlb,vma)                  do { } while (0)
45 //FIXME - ARM32 uses this now that things changed in the kernel. seems like it may be pointless on arm26, however to get things compiling...
46 #define tlb_start_vma(tlb,vma)                                          \
47         do {                                                            \
48                 if (!tlb->fullmm)                                       \
49                         flush_cache_range(vma, vma->vm_start, vma->vm_end); \
50         } while (0)
51 #define tlb_end_vma(tlb,vma)                    do { } while (0)
52
53 static inline void
54 tlb_remove_page(struct mmu_gather *tlb, struct page *page)
55 {
56         tlb->need_flush = 1;
57         free_page_and_swap_cache(page);
58 }
59
60 #define pte_free_tlb(tlb,ptep)          pte_free(ptep)
61 #define pmd_free_tlb(tlb,pmdp)          pmd_free(pmdp)
62
63 #endif