release/src-rt-6.x.4708/linux/linux-2.6.36/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 #ifdef CONFIG_CPU_HAS_PTEAEX
  14 static inline void set_asid(unsigned long asid)
  15 {
  16         __raw_writel(asid, MMU_PTEAEX);
  17 }
  18
  19 static inline unsigned long get_asid(void)
  20 {
  21         return __raw_readl(MMU_PTEAEX) & MMU_CONTEXT_ASID_MASK;
  22 }
  23 #else
  24 static 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
  37 static 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. */
  50 static inline void set_TTB(pgd_t *pgd)
  51 {
  52         __raw_writel((unsigned long)pgd, MMU_TTB);
  53 }
  54
  55 static inline pgd_t *get_TTB(void)
  56 {
  57         return (pgd_t *)__raw_readl(MMU_TTB);
  58 }
  59 #endif /* __ASM_SH_MMU_CONTEXT_32_H */