1 /* 2 * Based on arch/arm/include/asm/tlb.h 3 * 4 * Copyright (C) 2002 Russell King 5 * Copyright (C) 2012 ARM Ltd. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 #ifndef __ASM_TLB_H 20 #define __ASM_TLB_H 21 22 #include <linux/pagemap.h> 23 #include <linux/swap.h> 24 25 #ifdef CONFIG_HAVE_RCU_TABLE_FREE 26 27 #define tlb_remove_entry(tlb, entry) tlb_remove_table(tlb, entry) 28 static inline void __tlb_remove_table(void *_table) 29 { 30 free_page_and_swap_cache((struct page *)_table); 31 } 32 #else 33 #define tlb_remove_entry(tlb, entry) tlb_remove_page(tlb, entry) 34 #endif /* CONFIG_HAVE_RCU_TABLE_FREE */ 35 36 static void tlb_flush(struct mmu_gather *tlb); 37 38 #include <asm-generic/tlb.h> 39 40 static inline void tlb_flush(struct mmu_gather *tlb) 41 { 42 struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0); 43 44 /* 45 * The ASID allocator will either invalidate the ASID or mark 46 * it as used. 47 */ 48 if (tlb->fullmm) 49 return; 50 51 /* 52 * The intermediate page table levels are already handled by 53 * the __(pte|pmd|pud)_free_tlb() functions, so last level 54 * TLBI is sufficient here. 55 */ 56 __flush_tlb_range(&vma, tlb->start, tlb->end, true); 57 } 58 59 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, 60 unsigned long addr) 61 { 62 __flush_tlb_pgtable(tlb->mm, addr); 63 pgtable_page_dtor(pte); 64 tlb_remove_entry(tlb, pte); 65 } 66 67 #if CONFIG_PGTABLE_LEVELS > 2 68 static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, 69 unsigned long addr) 70 { 71 __flush_tlb_pgtable(tlb->mm, addr); 72 tlb_remove_entry(tlb, virt_to_page(pmdp)); 73 } 74 #endif 75 76 #if CONFIG_PGTABLE_LEVELS > 3 77 static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp, 78 unsigned long addr) 79 { 80 __flush_tlb_pgtable(tlb->mm, addr); 81 tlb_remove_entry(tlb, virt_to_page(pudp)); 82 } 83 #endif 84 85 #endif 86