Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
| 6 | #ifndef __UM_MMU_CONTEXT_H |
| 7 | #define __UM_MMU_CONTEXT_H |
| 8 | |
| 9 | #include "linux/sched.h" |
Jeff Dike | d67b569 | 2005-07-07 17:56:49 -0700 | [diff] [blame] | 10 | #include "linux/config.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include "choose-mode.h" |
Jeff Dike | d67b569 | 2005-07-07 17:56:49 -0700 | [diff] [blame] | 12 | #include "um_mmu.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
| 14 | #define get_mmu_context(task) do ; while(0) |
| 15 | #define activate_context(tsk) do ; while(0) |
| 16 | |
| 17 | #define deactivate_mm(tsk,mm) do { } while (0) |
| 18 | |
Benjamin LaHaise | c40504e | 2005-07-12 13:58:22 -0700 | [diff] [blame] | 19 | extern void force_flush_all(void); |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) |
| 22 | { |
Benjamin LaHaise | c40504e | 2005-07-12 13:58:22 -0700 | [diff] [blame] | 23 | if (old != new) |
| 24 | force_flush_all(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | } |
| 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, |
| 28 | struct task_struct *tsk) |
| 29 | { |
| 30 | unsigned cpu = smp_processor_id(); |
| 31 | |
| 32 | if(prev != next){ |
| 33 | cpu_clear(cpu, prev->cpu_vm_mask); |
| 34 | cpu_set(cpu, next->cpu_vm_mask); |
| 35 | if(next != &init_mm) |
| 36 | CHOOSE_MODE((void) 0, |
Jeff Dike | d67b569 | 2005-07-07 17:56:49 -0700 | [diff] [blame] | 37 | switch_mm_skas(&next->context.skas.id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | } |
| 39 | } |
| 40 | |
| 41 | static inline void enter_lazy_tlb(struct mm_struct *mm, |
| 42 | struct task_struct *tsk) |
| 43 | { |
| 44 | } |
| 45 | |
| 46 | extern int init_new_context_skas(struct task_struct *task, |
| 47 | struct mm_struct *mm); |
| 48 | |
| 49 | static inline int init_new_context_tt(struct task_struct *task, |
| 50 | struct mm_struct *mm) |
| 51 | { |
| 52 | return(0); |
| 53 | } |
| 54 | |
| 55 | static inline int init_new_context(struct task_struct *task, |
| 56 | struct mm_struct *mm) |
| 57 | { |
| 58 | return(CHOOSE_MODE_PROC(init_new_context_tt, init_new_context_skas, |
| 59 | task, mm)); |
| 60 | } |
| 61 | |
| 62 | extern void destroy_context_skas(struct mm_struct *mm); |
| 63 | |
| 64 | static inline void destroy_context(struct mm_struct *mm) |
| 65 | { |
| 66 | CHOOSE_MODE((void) 0, destroy_context_skas(mm)); |
| 67 | } |
| 68 | |
| 69 | #endif |
| 70 | |
| 71 | /* |
| 72 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 73 | * Emacs will notice this stuff at the end of the file and automatically |
| 74 | * adjust the settings for this buffer only. This must remain at the end |
| 75 | * of the file. |
| 76 | * --------------------------------------------------------------------------- |
| 77 | * Local variables: |
| 78 | * c-file-style: "linux" |
| 79 | * End: |
| 80 | */ |