1/*
2 *  include/asm-s390/mmu_context.h
3 *
4 *  S390 version
5 *
6 *  Derived from "include/asm-i386/mmu_context.h"
7 */
8
9#ifndef __S390_MMU_CONTEXT_H
10#define __S390_MMU_CONTEXT_H
11
12/*
13 * get a new mmu context.. S390 don't know about contexts.
14 */
15#define init_new_context(tsk,mm)        0
16
17#define destroy_context(mm)             flush_tlb_mm(mm)
18
19static inline void enter_lazy_tlb(struct mm_struct *mm,
20                                  struct task_struct *tsk, unsigned cpu)
21{
22}
23
24static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
25                             struct task_struct *tsk, unsigned cpu)
26{
27        unsigned long pgd;
28
29        if (prev != next) {
30	        pgd = (__pa(next->pgd)&PAGE_MASK) |
31                      (_SEGMENT_TABLE|USER_STD_MASK);
32                /* Load page tables */
33                asm volatile("    lctl  7,7,%0\n"   /* secondary space */
34                             "    lctl  13,13,%0\n" /* home space */
35                             : : "m" (pgd) );
36        }
37	set_bit(cpu, &next->cpu_vm_mask);
38}
39
40extern inline void activate_mm(struct mm_struct *prev,
41                               struct mm_struct *next)
42{
43        switch_mm(prev, next, current, smp_processor_id());
44}
45
46#endif
47