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-rw-r--r--include/asm-s390/mmu_context.h77
1 files changed, 0 insertions, 77 deletions
diff --git a/include/asm-s390/mmu_context.h b/include/asm-s390/mmu_context.h
deleted file mode 100644
index 4c2fbf48c9c4..000000000000
--- a/include/asm-s390/mmu_context.h
+++ /dev/null
@@ -1,77 +0,0 @@
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#include <asm/pgalloc.h>
13#include <asm/uaccess.h>
14#include <asm-generic/mm_hooks.h>
15
16static inline int init_new_context(struct task_struct *tsk,
17 struct mm_struct *mm)
18{
19 mm->context.asce_bits = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS;
20#ifdef CONFIG_64BIT
21 mm->context.asce_bits |= _ASCE_TYPE_REGION3;
22#endif
23 if (current->mm->context.pgstes) {
24 mm->context.noexec = 0;
25 mm->context.pgstes = 1;
26 } else {
27 mm->context.noexec = s390_noexec;
28 mm->context.pgstes = 0;
29 }
30 mm->context.asce_limit = STACK_TOP_MAX;
31 crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm));
32 return 0;
33}
34
35#define destroy_context(mm) do { } while (0)
36
37#ifndef __s390x__
38#define LCTL_OPCODE "lctl"
39#else
40#define LCTL_OPCODE "lctlg"
41#endif
42
43static inline void update_mm(struct mm_struct *mm, struct task_struct *tsk)
44{
45 pgd_t *pgd = mm->pgd;
46
47 S390_lowcore.user_asce = mm->context.asce_bits | __pa(pgd);
48 if (switch_amode) {
49 /* Load primary space page table origin. */
50 pgd = mm->context.noexec ? get_shadow_table(pgd) : pgd;
51 S390_lowcore.user_exec_asce = mm->context.asce_bits | __pa(pgd);
52 asm volatile(LCTL_OPCODE" 1,1,%0\n"
53 : : "m" (S390_lowcore.user_exec_asce) );
54 } else
55 /* Load home space page table origin. */
56 asm volatile(LCTL_OPCODE" 13,13,%0"
57 : : "m" (S390_lowcore.user_asce) );
58 set_fs(current->thread.mm_segment);
59}
60
61static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
62 struct task_struct *tsk)
63{
64 cpu_set(smp_processor_id(), next->cpu_vm_mask);
65 update_mm(next, tsk);
66}
67
68#define enter_lazy_tlb(mm,tsk) do { } while (0)
69#define deactivate_mm(tsk,mm) do { } while (0)
70
71static inline void activate_mm(struct mm_struct *prev,
72 struct mm_struct *next)
73{
74 switch_mm(prev, next, current);
75}
76
77#endif /* __S390_MMU_CONTEXT_H */