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