1da177e4c3
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!
55 lines
1.5 KiB
C
55 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
|