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 #include <asm-generic/tlb.h> 37 38 static inline void tlb_flush(struct mmu_gather *tlb) 39 { 40 if (tlb->fullmm) { 41 flush_tlb_mm(tlb->mm); 42 } else { 43 struct vm_area_struct vma = { .vm_mm = tlb->mm, }; 44 /* 45 * The intermediate page table levels are already handled by 46 * the __(pte|pmd|pud)_free_tlb() functions, so last level 47 * TLBI is sufficient here. 48 */ 49 __flush_tlb_range(&vma, tlb->start, tlb->end, true); 50 } 51 } 52 53 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, 54 unsigned long addr) 55 { 56 __flush_tlb_pgtable(tlb->mm, addr); 57 pgtable_page_dtor(pte); 58 tlb_remove_entry(tlb, pte); 59 } 60 61 #if CONFIG_PGTABLE_LEVELS > 2 62 static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, 63 unsigned long addr) 64 { 65 __flush_tlb_pgtable(tlb->mm, addr); 66 tlb_remove_entry(tlb, virt_to_page(pmdp)); 67 } 68 #endif 69 70 #if CONFIG_PGTABLE_LEVELS > 3 71 static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp, 72 unsigned long addr) 73 { 74 __flush_tlb_pgtable(tlb->mm, addr); 75 tlb_remove_entry(tlb, virt_to_page(pudp)); 76 } 77 #endif 78 79 #endif 80