LXR linux/arch/sh/include/asm/mmu_context

   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 */
   8static inline void destroy_context(struct mm_struct *mm)
   9{
  10        /* Do nothing */
  11}
  12
  13#ifdef CONFIG_CPU_HAS_PTEAEX
  14static inline void set_asid(unsigned long asid)
  15{
  16        __raw_writel(asid, MMU_PTEAEX);
  17}
  18
  19static inline unsigned long get_asid(void)
  20{
  21        return __raw_readl(MMU_PTEAEX) & MMU_CONTEXT_ASID_MASK;
  22}
  23#else
  24static inline void set_asid(unsigned long asid)
  25{
  26        unsigned long __dummy;
  27
  28        __asm__ __volatile__ ("mov.l    %2, %0\n\t"
  29                              "and      %3, %0\n\t"
  30                              "or       %1, %0\n\t"
  31                              "mov.l    %0, %2"
  32                              : "=&r" (__dummy)
  33                              : "r" (asid), "m" (__m(MMU_PTEH)),
  34                                "r" (0xffffff00));
  35}
  36
  37static inline unsigned long get_asid(void)
  38{
  39        unsigned long asid;
  40
  41        __asm__ __volatile__ ("mov.l    %1, %0"
  42                              : "=r" (asid)
  43                              : "m" (__m(MMU_PTEH)));
  44        asid &= MMU_CONTEXT_ASID_MASK;
  45        return asid;
  46}
  47#endif /* CONFIG_CPU_HAS_PTEAEX */
  48
  49/* MMU_TTB is used for optimizing the fault handling. */
  50static inline void set_TTB(pgd_t *pgd)
  51{
  52        __raw_writel((unsigned long)pgd, MMU_TTB);
  53}
  54
  55static inline pgd_t *get_TTB(void)
  56{
  57        return (pgd_t *)__raw_readl(MMU_TTB);
  58}
  59#endif /* __ASM_SH_MMU_CONTEXT_32_H */
  60