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 */
11 void hash__flush_tlb_mm(struct mm_struct *mm);
12 void hash__flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
13 void hash__flush_range(struct mm_struct *mm, unsigned long start, unsigned long end);
14
15 #ifdef CONFIG_SMP
16 void _tlbie(unsigned long address);
17 #else
18 static inline void _tlbie(unsigned long address)
19 {
20 asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
21 }
22 #endif
23 void _tlbia(void);
24
25 /*
26 * Called at the end of a mmu_gather operation to make sure the
27 * TLB flush is completely done.
28 */
29 static inline void tlb_flush(struct mmu_gather *tlb)
30 {
31 /* 603 needs to flush the whole TLB here since it doesn't use a hash table. */
32 if (!mmu_has_feature(MMU_FTR_HPTE_TABLE))
33 _tlbia();
34 }
35
36 static inline void flush_range(struct mm_struct *mm, unsigned long start, unsigned long end)
37 {
38 start &= PAGE_MASK;
39 if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
40 hash__flush_range(mm, start, end);
41 else if (end - start <= PAGE_SIZE)
42 _tlbie(start);
43 else
44 _tlbia();
45 }
46
47 static inline void flush_tlb_mm(struct mm_struct *mm)
48 {
49 if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
50 hash__flush_tlb_mm(mm);
51 else
52 _tlbia();
53 }
54
55 static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
56 {
57 if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
58 hash__flush_tlb_page(vma, vmaddr);
59 else
60 _tlbie(vmaddr);
61 }
62
63 static inline void
64 flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
65 {
66 flush_range(vma->vm_mm, start, end);
67 }
68
69 static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
70 {
71 flush_range(&init_mm, start, end);
72 }
73
74 static inline void local_flush_tlb_page(struct vm_area_struct *vma,
75 unsigned long vmaddr)
76 {
77 flush_tlb_page(vma, vmaddr);
78 }
79
80 static inline void local_flush_tlb_page_psize(struct mm_struct *mm,
81 unsigned long vmaddr, int psize)
82 {
83 flush_range(mm, vmaddr, vmaddr);
84 }
85
86 static inline void local_flush_tlb_mm(struct mm_struct *mm)
87 {
88 flush_tlb_mm(mm);
89 }
90
91 #endif /* _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H */
92
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.