1 /* 2 * TLB shootdown specifics for powerpc 3 * 4 * Copyright (C) 2002 Anton Blanchard, IBM Corp. 5 * Copyright (C) 2002 Paul Mackerras, IBM Corp. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 #ifndef _ASM_POWERPC_TLB_H 13 #define _ASM_POWERPC_TLB_H 14 #ifdef __KERNEL__ 15 16 #ifndef __powerpc64__ 17 #include <asm/pgtable.h> 18 #endif 19 #include <asm/pgalloc.h> 20 #include <asm/tlbflush.h> 21 #ifndef __powerpc64__ 22 #include <asm/page.h> 23 #include <asm/mmu.h> 24 #endif 25 26 #include <linux/pagemap.h> 27 28 struct mmu_gather; 29 30 #define tlb_start_vma(tlb, vma) do { } while (0) 31 #define tlb_end_vma(tlb, vma) do { } while (0) 32 33 #if !defined(CONFIG_PPC_STD_MMU) 34 35 #define tlb_flush(tlb) flush_tlb_mm((tlb)->mm) 36 37 #elif defined(__powerpc64__) 38 39 extern void pte_free_finish(void); 40 41 static inline void tlb_flush(struct mmu_gather *tlb) 42 { 43 struct ppc64_tlb_batch *tlbbatch = &__get_cpu_var(ppc64_tlb_batch); 44 45 /* If there's a TLB batch pending, then we must flush it because the 46 * pages are going to be freed and we really don't want to have a CPU 47 * access a freed page because it has a stale TLB 48 */ 49 if (tlbbatch->index) 50 __flush_tlb_pending(tlbbatch); 51 52 pte_free_finish(); 53 } 54 55 #else 56 57 extern void tlb_flush(struct mmu_gather *tlb); 58 59 #endif 60 61 /* Get the generic bits... */ 62 #include <asm-generic/tlb.h> 63 64 #if !defined(CONFIG_PPC_STD_MMU) || defined(__powerpc64__) 65 66 #define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0) 67 68 #else 69 extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep, 70 unsigned long address); 71 72 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, 73 unsigned long address) 74 { 75 if (pte_val(*ptep) & _PAGE_HASHPTE) 76 flush_hash_entry(tlb->mm, ptep, address); 77 } 78 79 #endif 80 #endif /* __KERNEL__ */ 81 #endif /* __ASM_POWERPC_TLB_H */ 82