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1#ifndef _ASM_POWERPC_TLBFLUSH_H
2#define _ASM_POWERPC_TLBFLUSH_H
3
4/*
5 * TLB flushing:
6 *
7 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
8 * - flush_tlb_page(vma, vmaddr) flushes one page
9 * - local_flush_tlb_mm(mm, full) flushes the specified mm context on
10 * the local processor
11 * - local_flush_tlb_page(vma, vmaddr) flushes one page on the local processor
12 * - flush_tlb_page_nohash(vma, vmaddr) flushes one page if SW loaded TLB
13 * - flush_tlb_range(vma, start, end) flushes a range of pages
14 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version
19 * 2 of the License, or (at your option) any later version.
20 */
21#ifdef __KERNEL__
22
23#ifdef CONFIG_PPC_MMU_NOHASH
24/*
25 * TLB flushing for software loaded TLB chips
26 *
27 * TODO: (CONFIG_FSL_BOOKE) determine if flush_tlb_range &
28 * flush_tlb_kernel_range are best implemented as tlbia vs
29 * specific tlbie's
30 */
31
32struct vm_area_struct;
33struct mm_struct;
34
35#define MMU_NO_CONTEXT ((unsigned int)-1)
36
37extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
38 unsigned long end);
39extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
40
41extern void local_flush_tlb_mm(struct mm_struct *mm);
42extern void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
43
44extern void __local_flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
45 int tsize, int ind);
46
47#ifdef CONFIG_SMP
48extern void flush_tlb_mm(struct mm_struct *mm);
49extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
50extern void __flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
51 int tsize, int ind);
52#else
53#define flush_tlb_mm(mm) local_flush_tlb_mm(mm)
54#define flush_tlb_page(vma,addr) local_flush_tlb_page(vma,addr)
55#define __flush_tlb_page(mm,addr,p,i) __local_flush_tlb_page(mm,addr,p,i)
56#endif
57#define flush_tlb_page_nohash(vma,addr) flush_tlb_page(vma,addr)
58
59#elif defined(CONFIG_PPC_STD_MMU_32)
60
61/*
62 * TLB flushing for "classic" hash-MMU 32-bit CPUs, 6xx, 7xx, 7xxx
63 */
64extern void flush_tlb_mm(struct mm_struct *mm);
65extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
66extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
67extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
68 unsigned long end);
69extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
70static inline void local_flush_tlb_page(struct vm_area_struct *vma,
71 unsigned long vmaddr)
72{
73 flush_tlb_page(vma, vmaddr);
74}
75static inline void local_flush_tlb_mm(struct mm_struct *mm)
76{
77 flush_tlb_mm(mm);
78}
79
80#elif defined(CONFIG_PPC_STD_MMU_64)
81
82#define MMU_NO_CONTEXT 0
83
84/*
85 * TLB flushing for 64-bit hash-MMU CPUs
86 */
87
88#include <linux/percpu.h>
89#include <asm/page.h>
90
91#define PPC64_TLB_BATCH_NR 192
92
93struct ppc64_tlb_batch {
94 int active;
95 unsigned long index;
96 struct mm_struct *mm;
97 real_pte_t pte[PPC64_TLB_BATCH_NR];
98 unsigned long vaddr[PPC64_TLB_BATCH_NR];
99 unsigned int psize;
100 int ssize;
101};
102DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
103
104extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
105
106extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
107 pte_t *ptep, unsigned long pte, int huge);
108
109#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
110
111static inline void arch_enter_lazy_mmu_mode(void)
112{
113 struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
114
115 batch->active = 1;
116}
117
118static inline void arch_leave_lazy_mmu_mode(void)
119{
120 struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
121
122 if (batch->index)
123 __flush_tlb_pending(batch);
124 batch->active = 0;
125}
126
127#define arch_flush_lazy_mmu_mode() do {} while (0)
128
129
130extern void flush_hash_page(unsigned long va, real_pte_t pte, int psize,
131 int ssize, int local);
132extern void flush_hash_range(unsigned long number, int local);
133
134
135static inline void local_flush_tlb_mm(struct mm_struct *mm)
136{
137}
138
139static inline void flush_tlb_mm(struct mm_struct *mm)
140{
141}
142
143static inline void local_flush_tlb_page(struct vm_area_struct *vma,
144 unsigned long vmaddr)
145{
146}
147
148static inline void flush_tlb_page(struct vm_area_struct *vma,
149 unsigned long vmaddr)
150{
151}
152
153static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
154 unsigned long vmaddr)
155{
156}
157
158static inline void flush_tlb_range(struct vm_area_struct *vma,
159 unsigned long start, unsigned long end)
160{
161}
162
163static inline void flush_tlb_kernel_range(unsigned long start,
164 unsigned long end)
165{
166}
167
168/* Private function for use by PCI IO mapping code */
169extern void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
170 unsigned long end);
171
172#else
173#error Unsupported MMU type
174#endif
175
176#endif /*__KERNEL__ */
177#endif /* _ASM_POWERPC_TLBFLUSH_H */