[PATCH] ARM: Fix VFP to use do_div()
[linux-2.6/verdex.git] / include / asm-i386 / mmu_context.h
blobbf08218357ea70c06d67d7aeb7384f231fd47e35
1 #ifndef __I386_SCHED_H
2 #define __I386_SCHED_H
4 #include <linux/config.h>
5 #include <asm/desc.h>
6 #include <asm/atomic.h>
7 #include <asm/pgalloc.h>
8 #include <asm/tlbflush.h>
11 * Used for LDT copy/destruction.
13 int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
14 void destroy_context(struct mm_struct *mm);
17 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
19 #ifdef CONFIG_SMP
20 unsigned cpu = smp_processor_id();
21 if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
22 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_LAZY;
23 #endif
26 static inline void switch_mm(struct mm_struct *prev,
27 struct mm_struct *next,
28 struct task_struct *tsk)
30 int cpu = smp_processor_id();
32 if (likely(prev != next)) {
33 /* stop flush ipis for the previous mm */
34 cpu_clear(cpu, prev->cpu_vm_mask);
35 #ifdef CONFIG_SMP
36 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_OK;
37 per_cpu(cpu_tlbstate, cpu).active_mm = next;
38 #endif
39 cpu_set(cpu, next->cpu_vm_mask);
41 /* Re-load page tables */
42 load_cr3(next->pgd);
45 * load the LDT, if the LDT is different:
47 if (unlikely(prev->context.ldt != next->context.ldt))
48 load_LDT_nolock(&next->context, cpu);
50 #ifdef CONFIG_SMP
51 else {
52 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_OK;
53 BUG_ON(per_cpu(cpu_tlbstate, cpu).active_mm != next);
55 if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
56 /* We were in lazy tlb mode and leave_mm disabled
57 * tlb flush IPI delivery. We must reload %cr3.
59 load_cr3(next->pgd);
60 load_LDT_nolock(&next->context, cpu);
63 #endif
66 #define deactivate_mm(tsk, mm) \
67 asm("movl %0,%%fs ; movl %0,%%gs": :"r" (0))
69 #define activate_mm(prev, next) \
70 switch_mm((prev),(next),NULL)
72 #endif