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
enter_lazy_tlb(struct mm_struct * mm,struct task_struct * tsk,unsigned cpu)19 static inline void enter_lazy_tlb(struct mm_struct *mm,
20 struct task_struct *tsk, unsigned cpu)
21 {
22 }
23
switch_mm(struct mm_struct * prev,struct mm_struct * next,struct task_struct * tsk,unsigned cpu)24 static 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
activate_mm(struct mm_struct * prev,struct mm_struct * next)40 extern 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