Commit | Line | Data |
---|---|---|
1da177e4 LT |
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) do { } while (0) | |
18 | ||
19 | static inline void enter_lazy_tlb(struct mm_struct *mm, | |
20 | struct task_struct *tsk) | |
21 | { | |
22 | } | |
23 | ||
24 | static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, | |
25 | struct task_struct *tsk) | |
26 | { | |
27 | if (prev != next) { | |
28 | #ifndef __s390x__ | |
29 | S390_lowcore.user_asce = (__pa(next->pgd)&PAGE_MASK) | | |
30 | (_SEGMENT_TABLE|USER_STD_MASK); | |
31 | /* Load home space page table origin. */ | |
32 | asm volatile("lctl 13,13,%0" | |
33 | : : "m" (S390_lowcore.user_asce) ); | |
34 | #else /* __s390x__ */ | |
35 | S390_lowcore.user_asce = (__pa(next->pgd) & PAGE_MASK) | | |
36 | (_REGION_TABLE|USER_STD_MASK); | |
37 | /* Load home space page table origin. */ | |
38 | asm volatile("lctlg 13,13,%0" | |
39 | : : "m" (S390_lowcore.user_asce) ); | |
40 | #endif /* __s390x__ */ | |
41 | } | |
42 | cpu_set(smp_processor_id(), next->cpu_vm_mask); | |
43 | } | |
44 | ||
45 | #define deactivate_mm(tsk,mm) do { } while (0) | |
46 | ||
47 | extern inline void activate_mm(struct mm_struct *prev, | |
48 | struct mm_struct *next) | |
49 | { | |
50 | switch_mm(prev, next, current); | |
51 | set_fs(current->thread.mm_segment); | |
52 | } | |
53 | ||
54 | #endif |