arch/sh/include/asm/mmu_context_32.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_MMU_CONTEXT_32_H
   3 #define __ASM_SH_MMU_CONTEXT_32_H
   4
   5 /*
   6  * Destroy context related info for an mm_struct that is about
   7  * to be put to rest.
   8  */
   9 static inline void destroy_context(struct mm_struct *mm)
  10 {
  11         /* Do nothing */
  12 }
  13
  14 #ifdef CONFIG_CPU_HAS_PTEAEX
  15 static inline void set_asid(unsigned long asid)
  16 {
  17         __raw_writel(asid, MMU_PTEAEX);
  18 }
  19
  20 static inline unsigned long get_asid(void)
  21 {
  22         return __raw_readl(MMU_PTEAEX) & MMU_CONTEXT_ASID_MASK;
  23 }
  24 #else
  25 static inline void set_asid(unsigned long asid)
  26 {
  27         unsigned long __dummy;
  28
  29         __asm__ __volatile__ ("mov.l    %2, %0\n\t"
  30                               "and      %3, %0\n\t"
  31                               "or       %1, %0\n\t"
  32                               "mov.l    %0, %2"
  33                               : "=&r" (__dummy)
  34                               : "r" (asid), "m" (__m(MMU_PTEH)),
  35                                 "r" (0xffffff00));
  36 }
  37
  38 static inline unsigned long get_asid(void)
  39 {
  40         unsigned long asid;
  41
  42         __asm__ __volatile__ ("mov.l    %1, %0"
  43                               : "=r" (asid)
  44                               : "m" (__m(MMU_PTEH)));
  45         asid &= MMU_CONTEXT_ASID_MASK;
  46         return asid;
  47 }
  48 #endif /* CONFIG_CPU_HAS_PTEAEX */
  49
  50 /* MMU_TTB is used for optimizing the fault handling. */
  51 static inline void set_TTB(pgd_t *pgd)
  52 {
  53         __raw_writel((unsigned long)pgd, MMU_TTB);
  54 }
  55
  56 static inline pgd_t *get_TTB(void)
  57 {
  58         return (pgd_t *)__raw_readl(MMU_TTB);
  59 }
  60 #endif /* __ASM_SH_MMU_CONTEXT_32_H */