61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_SH_MMU_CONTEXT_32_H
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#define __ASM_SH_MMU_CONTEXT_32_H
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/*
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* Destroy context related info for an mm_struct that is about
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* to be put to rest.
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*/
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static inline void destroy_context(struct mm_struct *mm)
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{
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/* Do nothing */
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}
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#ifdef CONFIG_CPU_HAS_PTEAEX
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static inline void set_asid(unsigned long asid)
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{
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__raw_writel(asid, MMU_PTEAEX);
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}
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static inline unsigned long get_asid(void)
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{
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return __raw_readl(MMU_PTEAEX) & MMU_CONTEXT_ASID_MASK;
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}
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#else
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static inline void set_asid(unsigned long asid)
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{
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unsigned long __dummy;
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__asm__ __volatile__ ("mov.l %2, %0\n\t"
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"and %3, %0\n\t"
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"or %1, %0\n\t"
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"mov.l %0, %2"
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: "=&r" (__dummy)
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: "r" (asid), "m" (__m(MMU_PTEH)),
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"r" (0xffffff00));
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}
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static inline unsigned long get_asid(void)
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{
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unsigned long asid;
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__asm__ __volatile__ ("mov.l %1, %0"
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: "=r" (asid)
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: "m" (__m(MMU_PTEH)));
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asid &= MMU_CONTEXT_ASID_MASK;
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return asid;
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}
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#endif /* CONFIG_CPU_HAS_PTEAEX */
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/* MMU_TTB is used for optimizing the fault handling. */
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static inline void set_TTB(pgd_t *pgd)
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{
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__raw_writel((unsigned long)pgd, MMU_TTB);
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}
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static inline pgd_t *get_TTB(void)
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{
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return (pgd_t *)__raw_readl(MMU_TTB);
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}
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#endif /* __ASM_SH_MMU_CONTEXT_32_H */
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