arch/sh/include/asm/mmu_context_32.h

   1 #ifndef __ASM_SH_MMU_CONTEXT_32_H
   2 #define __ASM_SH_MMU_CONTEXT_32_H
   3
   4 /*
   5  * Destroy context related info for an mm_struct that is about
   6  * to be put to rest.
   7  */
   8 static inline void destroy_context(struct mm_struct *mm)
   9 {
  10         /* Do nothing */
  11 }
  12
  13 static inline void set_asid(unsigned long asid)
  14 {
  15         unsigned long __dummy;
  16
  17         __asm__ __volatile__ ("mov.l    %2, %0\n\t"
  18                               "and      %3, %0\n\t"
  19                               "or       %1, %0\n\t"
  20                               "mov.l    %0, %2"
  21                               : "=&r" (__dummy)
  22                               : "r" (asid), "m" (__m(MMU_PTEH)),
  23                                 "r" (0xffffff00));
  24 }
  25
  26 static inline unsigned long get_asid(void)
  27 {
  28         unsigned long asid;
  29
  30         __asm__ __volatile__ ("mov.l    %1, %0"
  31                               : "=r" (asid)
  32                               : "m" (__m(MMU_PTEH)));
  33         asid &= MMU_CONTEXT_ASID_MASK;
  34         return asid;
  35 }
  36
  37 /* MMU_TTB is used for optimizing the fault handling. */
  38 static inline void set_TTB(pgd_t *pgd)
  39 {
  40         ctrl_outl((unsigned long)pgd, MMU_TTB);
  41 }
  42
  43 static inline pgd_t *get_TTB(void)
  44 {
  45         return (pgd_t *)ctrl_inl(MMU_TTB);
  46 }
  47 #endif /* __ASM_SH_MMU_CONTEXT_32_H */