diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-s390/mmu_context.h |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-s390/mmu_context.h')
-rw-r--r-- | include/asm-s390/mmu_context.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/include/asm-s390/mmu_context.h b/include/asm-s390/mmu_context.h new file mode 100644 index 000000000000..3a3bb3f2dad5 --- /dev/null +++ b/include/asm-s390/mmu_context.h @@ -0,0 +1,54 @@ +/* + * 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) do { } while (0) + +static inline void enter_lazy_tlb(struct mm_struct *mm, + struct task_struct *tsk) +{ +} + +static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, + struct task_struct *tsk) +{ + if (prev != next) { +#ifndef __s390x__ + S390_lowcore.user_asce = (__pa(next->pgd)&PAGE_MASK) | + (_SEGMENT_TABLE|USER_STD_MASK); + /* Load home space page table origin. */ + asm volatile("lctl 13,13,%0" + : : "m" (S390_lowcore.user_asce) ); +#else /* __s390x__ */ + S390_lowcore.user_asce = (__pa(next->pgd) & PAGE_MASK) | + (_REGION_TABLE|USER_STD_MASK); + /* Load home space page table origin. */ + asm volatile("lctlg 13,13,%0" + : : "m" (S390_lowcore.user_asce) ); +#endif /* __s390x__ */ + } + cpu_set(smp_processor_id(), next->cpu_vm_mask); +} + +#define deactivate_mm(tsk,mm) do { } while (0) + +extern inline void activate_mm(struct mm_struct *prev, + struct mm_struct *next) +{ + switch_mm(prev, next, current); + set_fs(current->thread.mm_segment); +} + +#endif |