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/*
* 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) |
(_SEGMENT_TABLE|USER_STD_MASK);
/* 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
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