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