| /* |
| * 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) 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) | (_REGION_TABLE|USER_STD_MASK); |
| /* Load page tables */ |
| asm volatile(" lctlg 7,7,%0\n" /* secondary space */ |
| " lctlg 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 |
