2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
6 #ifndef __UM_MMU_CONTEXT_H
7 #define __UM_MMU_CONTEXT_H
9 #include "linux/sched.h"
10 #include "linux/config.h"
11 #include "choose-mode.h"
14 #define get_mmu_context(task) do ; while(0)
15 #define activate_context(tsk) do ; while(0)
17 #define deactivate_mm(tsk,mm) do { } while (0)
19 extern void force_flush_all(void);
21 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
24 * This is called by fs/exec.c and fs/aio.c. In the first case, for an
25 * exec, we don't need to do anything as we're called from userspace
26 * and thus going to use a new host PID. In the second, we're called
27 * from a kernel thread, and thus need to go doing the mmap's on the
28 * host. Since they're very expensive, we want to avoid that as far as
31 if (old != new && (current->flags & PF_BORROWED_MM))
32 CHOOSE_MODE(force_flush_all(),
33 switch_mm_skas(&new->context.skas.id));
36 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
37 struct task_struct *tsk)
39 unsigned cpu = smp_processor_id();
42 cpu_clear(cpu, prev->cpu_vm_mask);
43 cpu_set(cpu, next->cpu_vm_mask);
46 switch_mm_skas(&next->context.skas.id));
50 static inline void enter_lazy_tlb(struct mm_struct *mm,
51 struct task_struct *tsk)
55 extern int init_new_context_skas(struct task_struct *task,
56 struct mm_struct *mm);
58 static inline int init_new_context_tt(struct task_struct *task,
64 static inline int init_new_context(struct task_struct *task,
67 return(CHOOSE_MODE_PROC(init_new_context_tt, init_new_context_skas,
71 extern void destroy_context_skas(struct mm_struct *mm);
73 static inline void destroy_context(struct mm_struct *mm)
75 CHOOSE_MODE((void) 0, destroy_context_skas(mm));
81 * Overrides for Emacs so that we follow Linus's tabbing style.
82 * Emacs will notice this stuff at the end of the file and automatically
83 * adjust the settings for this buffer only. This must remain at the end
85 * ---------------------------------------------------------------------------
87 * c-file-style: "linux"