LXR linux/arch/s390/include/asm/mmu.h

   1#ifndef __MMU_H
   2#define __MMU_H
   3
   4#include <linux/errno.h>
   5
   6typedef struct {
   7        atomic_t attach_count;
   8        unsigned int flush_mm;
   9        spinlock_t list_lock;
  10        struct list_head pgtable_list;
  11        struct list_head gmap_list;
  12        unsigned long asce_bits;
  13        unsigned long asce_limit;
  14        unsigned long vdso_base;
  15        /* Cloned contexts will be created with extended page tables. */
  16        unsigned int alloc_pgste:1;
  17        /* The mmu context has extended page tables. */
  18        unsigned int has_pgste:1;
  19} mm_context_t;
  20
  21#define INIT_MM_CONTEXT(name)                                                 \
  22        .context.list_lock    = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \
  23        .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list),    \
  24        .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list),
  25
  26static inline int tprot(unsigned long addr)
  27{
  28        int rc = -EFAULT;
  29
  30        asm volatile(
  31                "       tprot   0(%1),0\n"
  32                "0:     ipm     %0\n"
  33                "       srl     %0,28\n"
  34                "1:\n"
  35                EX_TABLE(0b,1b)
  36                : "+d" (rc) : "a" (addr) : "cc");
  37        return rc;
  38}
  39
  40#endif
  41