55 строки
1.5 KiB
C
55 строки
1.5 KiB
C
/*
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* include/asm-s390/mmu_context.h
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*
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* S390 version
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*
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* Derived from "include/asm-i386/mmu_context.h"
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*/
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#ifndef __S390_MMU_CONTEXT_H
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#define __S390_MMU_CONTEXT_H
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/*
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* get a new mmu context.. S390 don't know about contexts.
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*/
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#define init_new_context(tsk,mm) 0
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#define destroy_context(mm) do { } while (0)
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static inline void enter_lazy_tlb(struct mm_struct *mm,
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struct task_struct *tsk)
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{
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}
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static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *tsk)
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{
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if (prev != next) {
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#ifndef __s390x__
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S390_lowcore.user_asce = (__pa(next->pgd)&PAGE_MASK) |
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(_SEGMENT_TABLE|USER_STD_MASK);
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/* Load home space page table origin. */
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asm volatile("lctl 13,13,%0"
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: : "m" (S390_lowcore.user_asce) );
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#else /* __s390x__ */
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S390_lowcore.user_asce = (__pa(next->pgd) & PAGE_MASK) |
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(_REGION_TABLE|USER_STD_MASK);
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/* Load home space page table origin. */
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asm volatile("lctlg 13,13,%0"
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: : "m" (S390_lowcore.user_asce) );
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#endif /* __s390x__ */
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}
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cpu_set(smp_processor_id(), next->cpu_vm_mask);
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}
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#define deactivate_mm(tsk,mm) do { } while (0)
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static inline void activate_mm(struct mm_struct *prev,
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struct mm_struct *next)
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{
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switch_mm(prev, next, current);
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set_fs(current->thread.mm_segment);
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}
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#endif
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