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

   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 */
   9static inline void destroy_context(struct mm_struct *mm)
  10{
  11        /* Do nothing */
  12}
  13
  14#ifdef CONFIG_CPU_HAS_PTEAEX
  15static inline void set_asid(unsigned long asid)
  16{
  17        __raw_writel(asid, MMU_PTEAEX);
  18}
  19
  20static inline unsigned long get_asid(void)
  21{
  22        return __raw_readl(MMU_PTEAEX) & MMU_CONTEXT_ASID_MASK;
  23}
  24#else
  25static 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
  38static 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. */
  51static inline void set_TTB(pgd_t *pgd)
  52{
  53        __raw_writel((unsigned long)pgd, MMU_TTB);
  54}
  55
  56static inline pgd_t *get_TTB(void)
  57{
  58        return (pgd_t *)__raw_readl(MMU_TTB);
  59}
  60#endif /* __ASM_SH_MMU_CONTEXT_32_H */
  61