linux/include/asm-s390/mmu_context.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

54 lines
1.5 KiB
C

/*
* 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) do { } while (0)
static inline void enter_lazy_tlb(struct mm_struct *mm,
struct task_struct *tsk)
{
}
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
if (prev != next) {
#ifndef __s390x__
S390_lowcore.user_asce = (__pa(next->pgd)&PAGE_MASK) |
(_SEGMENT_TABLE|USER_STD_MASK);
/* Load home space page table origin. */
asm volatile("lctl 13,13,%0"
: : "m" (S390_lowcore.user_asce) );
#else /* __s390x__ */
S390_lowcore.user_asce = (__pa(next->pgd) & PAGE_MASK) |
(_REGION_TABLE|USER_STD_MASK);
/* Load home space page table origin. */
asm volatile("lctlg 13,13,%0"
: : "m" (S390_lowcore.user_asce) );
#endif /* __s390x__ */
}
cpu_set(smp_processor_id(), next->cpu_vm_mask);
}
#define deactivate_mm(tsk,mm) do { } while (0)
extern inline void activate_mm(struct mm_struct *prev,
struct mm_struct *next)
{
switch_mm(prev, next, current);
set_fs(current->thread.mm_segment);
}
#endif