1#ifndef __ASM_SH_TLB_H
  2#define __ASM_SH_TLB_H
  3
  4#ifdef CONFIG_SUPERH64
  5# include <asm/tlb_64.h>
  6#endif
  7
  8#ifndef __ASSEMBLY__
  9#include <linux/pagemap.h>
 10
 11#ifdef CONFIG_MMU
 12#include <linux/swap.h>
 13#include <asm/pgalloc.h>
 14#include <asm/tlbflush.h>
 15#include <asm/mmu_context.h>
 16
 17/*
 18 * TLB handling.  This allows us to remove pages from the page
 19 * tables, and efficiently handle the TLB issues.
 20 */
 21struct mmu_gather {
 22	struct mm_struct	*mm;
 23	unsigned int		fullmm;
 24	unsigned long		start, end;
 25};
 26
 27static inline void init_tlb_gather(struct mmu_gather *tlb)
 28{
 29	tlb->start = TASK_SIZE;
 30	tlb->end = 0;
 31
 32	if (tlb->fullmm) {
 33		tlb->start = 0;
 34		tlb->end = TASK_SIZE;
 35	}
 36}
 37
 38static inline void
 39tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long start, unsigned long end)
 40{
 41	tlb->mm = mm;
 42	tlb->start = start;
 43	tlb->end = end;
 44	tlb->fullmm = !(start | (end+1));
 45
 46	init_tlb_gather(tlb);
 47}
 48
 49static inline void
 50tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
 51{
 52	if (tlb->fullmm)
 53		flush_tlb_mm(tlb->mm);
 54
 55	/* keep the page table cache within bounds */
 56	check_pgt_cache();
 57}
 58
 59static inline void
 60tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, unsigned long address)
 61{
 62	if (tlb->start > address)
 63		tlb->start = address;
 64	if (tlb->end < address + PAGE_SIZE)
 65		tlb->end = address + PAGE_SIZE;
 66}
 67
 68/*
 69 * In the case of tlb vma handling, we can optimise these away in the
 70 * case where we're doing a full MM flush.  When we're doing a munmap,
 71 * the vmas are adjusted to only cover the region to be torn down.
 72 */
 73static inline void
 74tlb_start_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
 75{
 76	if (!tlb->fullmm)
 77		flush_cache_range(vma, vma->vm_start, vma->vm_end);
 78}
 79
 80static inline void
 81tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
 82{
 83	if (!tlb->fullmm && tlb->end) {
 84		flush_tlb_range(vma, tlb->start, tlb->end);
 85		init_tlb_gather(tlb);
 86	}
 87}
 88
 89static inline void tlb_flush_mmu_tlbonly(struct mmu_gather *tlb)
 90{
 91}
 92
 93static inline void tlb_flush_mmu_free(struct mmu_gather *tlb)
 94{
 95}
 96
 97static inline void tlb_flush_mmu(struct mmu_gather *tlb)
 98{
 99}
100
101static inline int __tlb_remove_page(struct mmu_gather *tlb, struct page *page)
102{
103	free_page_and_swap_cache(page);
104	return 1; /* avoid calling tlb_flush_mmu */
105}
106
107static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
108{
109	__tlb_remove_page(tlb, page);
110}
111
112#define pte_free_tlb(tlb, ptep, addr)	pte_free((tlb)->mm, ptep)
113#define pmd_free_tlb(tlb, pmdp, addr)	pmd_free((tlb)->mm, pmdp)
114#define pud_free_tlb(tlb, pudp, addr)	pud_free((tlb)->mm, pudp)
115
116#define tlb_migrate_finish(mm)		do { } while (0)
117
118#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SUPERH64)
119extern void tlb_wire_entry(struct vm_area_struct *, unsigned long, pte_t);
120extern void tlb_unwire_entry(void);
121#else
122static inline void tlb_wire_entry(struct vm_area_struct *vma ,
123				  unsigned long addr, pte_t pte)
124{
125	BUG();
126}
127
128static inline void tlb_unwire_entry(void)
129{
130	BUG();
131}
132#endif
133
134#else /* CONFIG_MMU */
135
136#define tlb_start_vma(tlb, vma)				do { } while (0)
137#define tlb_end_vma(tlb, vma)				do { } while (0)
138#define __tlb_remove_tlb_entry(tlb, pte, address)	do { } while (0)
139#define tlb_flush(tlb)					do { } while (0)
140
141#include <asm-generic/tlb.h>
142
143#endif /* CONFIG_MMU */
144#endif /* __ASSEMBLY__ */
145#endif /* __ASM_SH_TLB_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_TLB_H
 3#define __ASM_SH_TLB_H
 4
 5#ifdef CONFIG_SUPERH64
 6# include <asm/tlb_64.h>
 7#endif
 8
 9#ifndef __ASSEMBLY__
10#include <linux/pagemap.h>
11
12#ifdef CONFIG_MMU
13#include <linux/swap.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
14
15#include <asm-generic/tlb.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
16
17#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SUPERH64)
18extern void tlb_wire_entry(struct vm_area_struct *, unsigned long, pte_t);
19extern void tlb_unwire_entry(void);
20#else
21static inline void tlb_wire_entry(struct vm_area_struct *vma ,
22				  unsigned long addr, pte_t pte)
23{
24	BUG();
25}
26
27static inline void tlb_unwire_entry(void)
28{
29	BUG();
30}
31#endif
32
33#else /* CONFIG_MMU */
 
 
 
 
 
34
35#include <asm-generic/tlb.h>
36
37#endif /* CONFIG_MMU */
38#endif /* __ASSEMBLY__ */
39#endif /* __ASM_SH_TLB_H */