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) | (_REGION_TABLE|USER_STD_MASK);
31 /* Load page tables */
32 asm volatile(" lctlg 7,7,%0\n" /* secondary space */
33 " lctlg 13,13,%0\n" /* home space */
34 : : "m" (pgd) );
35 }
36 set_bit(cpu, &next->cpu_vm_mask);
37 }
38
activate_mm(struct mm_struct * prev,struct mm_struct * next)39 extern inline void activate_mm(struct mm_struct *prev,
40 struct mm_struct *next)
41 {
42 switch_mm(prev, next, current, smp_processor_id());
43 }
44
45 #endif
46