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#ifndef __I386_MMU_CONTEXT_H

#define __I386_MMU_CONTEXT_H

#include <linux/config.h>

#include <asm/desc.h>

#include <asm/atomic.h>

#include <asm/pgalloc.h>

/*

 * hooks to add arch specific data into the mm struct.

 * Note that destroy_context is called even if init_new_context

 * fails.

 */

int init_new_context(struct task_struct *tsk, struct mm_struct *mm);

void destroy_context(struct mm_struct *mm);

#ifdef CONFIG_SMP

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk, unsigned cpu)

{

        if(cpu_tlbstate[cpu].state == TLBSTATE_OK)

                cpu_tlbstate[cpu].state = TLBSTATE_LAZY;

}

#else

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk, unsigned cpu)

{

}

#endif

static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk, unsigned cpu)

{

        if (prev != next) {

                /* stop flush ipis for the previous mm */

                clear_bit(cpu, &prev->cpu_vm_mask);

#ifdef CONFIG_SMP

                cpu_tlbstate[cpu].state = TLBSTATE_OK;

                cpu_tlbstate[cpu].active_mm = next;

#endif

                set_bit(cpu, &next->cpu_vm_mask);

                /* Re-load page tables */

                load_cr3(next->pgd);

                /* load_LDT, if either the previous or next thread

                 * has a non-default LDT.

                 */

                if (next->context.size+prev->context.size)

                        load_LDT(&next->context);

        }

#ifdef CONFIG_SMP

        else {

                cpu_tlbstate[cpu].state = TLBSTATE_OK;

                if(cpu_tlbstate[cpu].active_mm != next)

                        out_of_line_bug();

                if(!test_and_set_bit(cpu, &next->cpu_vm_mask)) {

                        /* We were in lazy tlb mode and leave_mm disabled

                         * tlb flush IPI delivery. We must reload %cr3.

                         */

                        load_cr3(next->pgd);

                        load_LDT(&next->context);

                }

        }

#endif

}

#define activate_mm(prev, next) \

        switch_mm((prev),(next),NULL,smp_processor_id())

#endif