diff options
Diffstat (limited to 'include/asm-s390/mmu_context.h')
-rw-r--r-- | include/asm-s390/mmu_context.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/asm-s390/mmu_context.h b/include/asm-s390/mmu_context.h new file mode 100644 index 000000000..c2a215135 --- /dev/null +++ b/include/asm-s390/mmu_context.h @@ -0,0 +1,45 @@ +/* + * 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) do { } while (0) + +#define destroy_context(mm) flush_tlb_mm(mm) + +static inline void enter_lazy_tlb(struct mm_struct *mm, + struct task_struct *tsk, unsigned cpu) +{ +} + +static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, + struct task_struct *tsk, unsigned cpu) +{ + unsigned long pgd; + + if (prev != next) { + pgd = (__pa(next->pgd) & PAGE_MASK) | _SEGMENT_TABLE; + /* Load page tables */ + asm volatile(" lctl 7,7,%0\n" /* secondary space */ + " lctl 13,13,%0\n" /* home space */ + : : "m" (pgd) ); + } + set_bit(cpu, &next->cpu_vm_mask); +} + +extern inline void activate_mm(struct mm_struct *prev, + struct mm_struct *next) +{ + switch_mm(prev, next, current, smp_processor_id()); +} + +#endif |