Linux 4.8-rc8
[linux/fpc-iii.git] / arch / s390 / include / asm / mmu.h
blob6d39329c894b3e9b399174e7787efc92e5345426
1 #ifndef __MMU_H
2 #define __MMU_H
4 #include <linux/cpumask.h>
5 #include <linux/errno.h>
7 typedef struct {
8 cpumask_t cpu_attach_mask;
9 atomic_t flush_count;
10 unsigned int flush_mm;
11 spinlock_t pgtable_lock;
12 struct list_head pgtable_list;
13 spinlock_t gmap_lock;
14 struct list_head gmap_list;
15 unsigned long asce;
16 unsigned long asce_limit;
17 unsigned long vdso_base;
18 /* The mmu context allocates 4K page tables. */
19 unsigned int alloc_pgste:1;
20 /* The mmu context uses extended page tables. */
21 unsigned int has_pgste:1;
22 /* The mmu context uses storage keys. */
23 unsigned int use_skey:1;
24 } mm_context_t;
26 #define INIT_MM_CONTEXT(name) \
27 .context.pgtable_lock = \
28 __SPIN_LOCK_UNLOCKED(name.context.pgtable_lock), \
29 .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \
30 .context.gmap_lock = __SPIN_LOCK_UNLOCKED(name.context.gmap_lock), \
31 .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list),
33 static inline int tprot(unsigned long addr)
35 int rc = -EFAULT;
37 asm volatile(
38 " tprot 0(%1),0\n"
39 "0: ipm %0\n"
40 " srl %0,28\n"
41 "1:\n"
42 EX_TABLE(0b,1b)
43 : "+d" (rc) : "a" (addr) : "cc");
44 return rc;
47 #endif