arch/s390/include/asm/mmu.h

   1 #ifndef __MMU_H
   2 #define __MMU_H
   3
   4 #include <linux/cpumask.h>
   5 #include <linux/errno.h>
   6
   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 gmap_asce;
  16         unsigned long asce;
  17         unsigned long asce_limit;
  18         unsigned long vdso_base;
  19         /* The mmu context allocates 4K page tables. */
  20         unsigned int alloc_pgste:1;
  21         /* The mmu context uses extended page tables. */
  22         unsigned int has_pgste:1;
  23         /* The mmu context uses storage keys. */
  24         unsigned int use_skey:1;
  25 } mm_context_t;
  26
  27 #define INIT_MM_CONTEXT(name)                                              \
  28         .context.pgtable_lock =                                            \
  29                         __SPIN_LOCK_UNLOCKED(name.context.pgtable_lock),   \
  30         .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \
  31         .context.gmap_lock = __SPIN_LOCK_UNLOCKED(name.context.gmap_lock), \
  32         .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list),
  33
  34 static inline int tprot(unsigned long addr)
  35 {
  36         int rc = -EFAULT;
  37
  38         asm volatile(
  39                 "       tprot   0(%1),0\n"
  40                 "0:     ipm     %0\n"
  41                 "       srl     %0,28\n"
  42                 "1:\n"
  43                 EX_TABLE(0b,1b)
  44                 : "+d" (rc) : "a" (addr) : "cc");
  45         return rc;
  46 }
  47
  48 #endif