tlbflush.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H
 3#define _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H
 4
 5#include <linux/build_bug.h>
 6
 7#define MMU_NO_CONTEXT      (0)
 8/*
 9 * TLB flushing for "classic" hash-MMU 32-bit CPUs, 6xx, 7xx, 7xxx
10 */
11void hash__flush_tlb_mm(struct mm_struct *mm);
12void hash__flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
13void hash__flush_range(struct mm_struct *mm, unsigned long start, unsigned long end);
14void hash__flush_gather(struct mmu_gather *tlb);
15
16#ifdef CONFIG_SMP
17void _tlbie(unsigned long address);
18#else
19static inline void _tlbie(unsigned long address)
20{
21	asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
22}
23#endif
24void _tlbia(void);
25
26/*
27 * Called at the end of a mmu_gather operation to make sure the
28 * TLB flush is completely done.
29 */
30static inline void tlb_flush(struct mmu_gather *tlb)
31{
32	/* 603 needs to flush the whole TLB here since it doesn't use a hash table. */
33	if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
34		hash__flush_gather(tlb);
35	else
36		_tlbia();
37}
38
39static inline void flush_range(struct mm_struct *mm, unsigned long start, unsigned long end)
40{
41	start &= PAGE_MASK;
42	if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
43		hash__flush_range(mm, start, end);
44	else if (end - start <= PAGE_SIZE)
45		_tlbie(start);
46	else
47		_tlbia();
48}
49
50static inline void flush_tlb_mm(struct mm_struct *mm)
51{
52	if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
53		hash__flush_tlb_mm(mm);
54	else
55		_tlbia();
56}
57
58static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
59{
60	if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
61		hash__flush_tlb_page(vma, vmaddr);
62	else
63		_tlbie(vmaddr);
64}
65
66static inline void
67flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
68{
69	flush_range(vma->vm_mm, start, end);
70}
71
72static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
73{
74	flush_range(&init_mm, start, end);
75}
76
77static inline void local_flush_tlb_page(struct vm_area_struct *vma,
78					unsigned long vmaddr)
79{
80	flush_tlb_page(vma, vmaddr);
81}
82
83static inline void local_flush_tlb_page_psize(struct mm_struct *mm,
84					      unsigned long vmaddr, int psize)
85{
86	flush_range(mm, vmaddr, vmaddr);
87}
88
89static inline void local_flush_tlb_mm(struct mm_struct *mm)
90{
91	flush_tlb_mm(mm);
92}
93
94#endif /* _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H */