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/*

 *  include/asm-s390/mmu_context.h

 *

 *  S390 version

 *

 *  Derived from "include/asm-i386/mmu_context.h"

 */

#ifndef __S390_MMU_CONTEXT_H

#define __S390_MMU_CONTEXT_H

/*

 * get a new mmu context.. S390 don't know about contexts.

 */

#define init_new_context(tsk,mm)        0

#define destroy_context(mm)             flush_tlb_mm(mm)

static inline void enter_lazy_tlb(struct mm_struct *mm,

                                  struct task_struct *tsk, unsigned cpu)

{

}

static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,

                             struct task_struct *tsk, unsigned cpu)

{

        unsigned long pgd;

        if (prev != next) {

                pgd = (__pa(next->pgd)&PAGE_MASK) |

                      (_SEGMENT_TABLE|USER_STD_MASK);

                /* Load page tables */

                asm volatile("    lctl  7,7,%0\n"   /* secondary space */

                             "    lctl  13,13,%0\n" /* home space */

                             : : "m" (pgd) );

        }

        set_bit(cpu, &next->cpu_vm_mask);

}

extern inline void activate_mm(struct mm_struct *prev,

                               struct mm_struct *next)

{

        switch_mm(prev, next, current, smp_processor_id());

}

#endif