projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| ba180fd4 | 2 | * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
| 1da177e4 LT |
3 | * Licensed under the GPL |
| 4 | */ | |
| 5 | ||
| 6 | #ifndef __UM_MMU_CONTEXT_H | |
| 7 | #define __UM_MMU_CONTEXT_H | |
| 8 | ||
| 4dc706c2 AV |
9 | #include <linux/sched.h> |
| 10 | #include <asm/mmu.h> | |
| 1da177e4 | 11 | |
| ac2aca28 | 12 | extern void uml_setup_stubs(struct mm_struct *mm); |
| 62e88b1c DH |
13 | /* |
| 14 | * Needed since we do not use the asm-generic/mm_hooks.h: | |
| 15 | */ | |
| 16 | static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) | |
| 17 | { | |
| 18 | uml_setup_stubs(mm); | |
| 19 | } | |
| 3963333f | 20 | extern void arch_exit_mmap(struct mm_struct *mm); |
| 62e88b1c DH |
21 | static inline void arch_unmap(struct mm_struct *mm, |
| 22 | struct vm_area_struct *vma, | |
| 23 | unsigned long start, unsigned long end) | |
| 24 | { | |
| 25 | } | |
| 26 | static inline void arch_bprm_mm_init(struct mm_struct *mm, | |
| 27 | struct vm_area_struct *vma) | |
| 28 | { | |
| 29 | } | |
| 9d95b175 DH |
30 | |
| 31 | static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, | |
| 32 | bool write, bool execute, bool foreign) | |
| 33 | { | |
| 34 | /* by default, allow everything */ | |
| 35 | return true; | |
| 36 | } | |
| 37 | ||
| 38 | static inline bool arch_pte_access_permitted(pte_t pte, bool write) | |
| 39 | { | |
| 40 | /* by default, allow everything */ | |
| 41 | return true; | |
| 42 | } | |
| 43 | ||
| 62e88b1c DH |
44 | /* |
| 45 | * end asm-generic/mm_hooks.h functions | |
| 46 | */ | |
| 3963333f | 47 | |
| 1da177e4 LT |
48 | #define deactivate_mm(tsk,mm) do { } while (0) |
| 49 | ||
| c40504e8 BL |
50 | extern void force_flush_all(void); |
| 51 | ||
| 1da177e4 LT |
52 | static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) |
| 53 | { | |
| 1e40cd38 | 54 | /* |
| aab2545f ON |
55 | * This is called by fs/exec.c and sys_unshare() |
| 56 | * when the new ->mm is used for the first time. | |
| 1e40cd38 | 57 | */ |
| aab2545f | 58 | __switch_mm(&new->context.id); |
| ac2aca28 AV |
59 | down_write(&new->mmap_sem); |
| 60 | uml_setup_stubs(new); | |
| 61 | up_write(&new->mmap_sem); | |
| 1da177e4 LT |
62 | } |
| 63 | ||
| 1da177e4 LT |
64 | static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, |
| 65 | struct task_struct *tsk) | |
| 66 | { | |
| 67 | unsigned cpu = smp_processor_id(); | |
| 68 | ||
| 69 | if(prev != next){ | |
| fa40699b RR |
70 | cpumask_clear_cpu(cpu, mm_cpumask(prev)); |
| 71 | cpumask_set_cpu(cpu, mm_cpumask(next)); | |
| 1da177e4 | 72 | if(next != &init_mm) |
| 6c738ffa | 73 | __switch_mm(&next->context.id); |
| 1da177e4 LT |
74 | } |
| 75 | } | |
| 76 | ||
| 77 | static inline void enter_lazy_tlb(struct mm_struct *mm, | |
| 78 | struct task_struct *tsk) | |
| 79 | { | |
| 80 | } | |
| 81 | ||
| 77bf4400 | 82 | extern int init_new_context(struct task_struct *task, struct mm_struct *mm); |
| 1da177e4 | 83 | |
| 77bf4400 | 84 | extern void destroy_context(struct mm_struct *mm); |
| 1da177e4 LT |
85 | |
| 86 | #endif |