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 	BUILD_BUG();
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