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 19static inline void enter_lazy_tlb(struct mm_struct *mm, 20 struct task_struct *tsk, unsigned cpu) 21{ 22} 23 24static 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 39extern 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