1 #ifndef _ASM_POWERPC_TLBFLUSH_H
2 #define _ASM_POWERPC_TLBFLUSH_H
6 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
7 * - flush_tlb_page(vma, vmaddr) flushes one page
8 * - flush_tlb_page_nohash(vma, vmaddr) flushes one page if SW loaded TLB
9 * - flush_tlb_range(vma, start, end) flushes a range of pages
10 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
11 * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
21 struct vm_area_struct;
23 #if defined(CONFIG_4xx) || defined(CONFIG_8xx) || defined(CONFIG_FSL_BOOKE)
25 * TLB flushing for software loaded TLB chips
27 * TODO: (CONFIG_FSL_BOOKE) determine if flush_tlb_range &
28 * flush_tlb_kernel_range are best implemented as tlbia vs
32 extern void _tlbie(unsigned long address);
34 #if defined(CONFIG_40x) || defined(CONFIG_8xx)
35 #define _tlbia() asm volatile ("tlbia; sync" : : : "memory")
36 #else /* CONFIG_44x || CONFIG_FSL_BOOKE */
37 extern void _tlbia(void);
40 static inline void flush_tlb_mm(struct mm_struct *mm)
45 static inline void flush_tlb_page(struct vm_area_struct *vma,
51 static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
57 static inline void flush_tlb_range(struct vm_area_struct *vma,
58 unsigned long start, unsigned long end)
63 static inline void flush_tlb_kernel_range(unsigned long start,
69 #elif defined(CONFIG_PPC32)
71 * TLB flushing for "classic" hash-MMMU 32-bit CPUs, 6xx, 7xx, 7xxx
73 extern void _tlbie(unsigned long address);
74 extern void _tlbia(void);
76 extern void flush_tlb_mm(struct mm_struct *mm);
77 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
78 extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
79 extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
81 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
85 * TLB flushing for 64-bit has-MMU CPUs
88 #include <linux/percpu.h>
91 #define PPC64_TLB_BATCH_NR 192
93 struct ppc64_tlb_batch {
97 real_pte_t pte[PPC64_TLB_BATCH_NR];
98 unsigned long vaddr[PPC64_TLB_BATCH_NR];
101 DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
103 extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
105 extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
106 pte_t *ptep, unsigned long pte, int huge);
108 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
110 static inline void arch_enter_lazy_mmu_mode(void)
112 struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
117 static inline void arch_leave_lazy_mmu_mode(void)
119 struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
122 __flush_tlb_pending(batch);
126 #define arch_flush_lazy_mmu_mode() do {} while (0)
129 extern void flush_hash_page(unsigned long va, real_pte_t pte, int psize,
131 extern void flush_hash_range(unsigned long number, int local);
134 static inline void flush_tlb_mm(struct mm_struct *mm)
138 static inline void flush_tlb_page(struct vm_area_struct *vma,
139 unsigned long vmaddr)
143 static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
144 unsigned long vmaddr)
148 static inline void flush_tlb_range(struct vm_area_struct *vma,
149 unsigned long start, unsigned long end)
153 static inline void flush_tlb_kernel_range(unsigned long start,
161 * This gets called at the end of handling a page fault, when
162 * the kernel has put a new PTE into the page table for the process.
163 * We use it to ensure coherency between the i-cache and d-cache
164 * for the page which has just been mapped in.
165 * On machines which use an MMU hash table, we use this to put a
166 * corresponding HPTE into the hash table ahead of time, instead of
167 * waiting for the inevitable extra hash-table miss exception.
169 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
172 * This is called in munmap when we have freed up some page-table
173 * pages. We don't need to do anything here, there's nothing special
174 * about our page-table pages. -- paulus
176 static inline void flush_tlb_pgtables(struct mm_struct *mm,
177 unsigned long start, unsigned long end)
181 #endif /*__KERNEL__ */
182 #endif /* _ASM_POWERPC_TLBFLUSH_H */