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 static inline void __tlb_remove_table(void *_table) 26 { 27 free_page_and_swap_cache((struct page *)_table); 28 } 29 30 #define tlb_flush tlb_flush 31 static void tlb_flush(struct mmu_gather *tlb); 32 33 #include <asm-generic/tlb.h> 34 35 static inline void tlb_flush(struct mmu_gather *tlb) 36 { 37 struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0); 38 bool last_level = !tlb->freed_tables; 39 unsigned long stride = tlb_get_unmap_size(tlb); 40 41 /* 42 * If we're tearing down the address space then we only care about 43 * invalidating the walk-cache, since the ASID allocator won't 44 * reallocate our ASID without invalidating the entire TLB. 45 */ 46 if (tlb->fullmm) { 47 if (!last_level) 48 flush_tlb_mm(tlb->mm); 49 return; 50 } 51 52 __flush_tlb_range(&vma, tlb->start, tlb->end, stride, last_level); 53 } 54 55 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, 56 unsigned long addr) 57 { 58 pgtable_page_dtor(pte); 59 tlb_remove_table(tlb, pte); 60 } 61 62 #if CONFIG_PGTABLE_LEVELS > 2 63 static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, 64 unsigned long addr) 65 { 66 struct page *page = virt_to_page(pmdp); 67 68 pgtable_pmd_page_dtor(page); 69 tlb_remove_table(tlb, page); 70 } 71 #endif 72 73 #if CONFIG_PGTABLE_LEVELS > 3 74 static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp, 75 unsigned long addr) 76 { 77 tlb_remove_table(tlb, virt_to_page(pudp)); 78 } 79 #endif 80 81 #endif 82