1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com> 4 * Copyright (C) 2012 Regents of the University of California 5 */ 6 7 #ifndef _ASM_RISCV_TLBFLUSH_H 8 #define _ASM_RISCV_TLBFLUSH_H 9 10 #include <linux/mm_types.h> 11 #include <asm/smp.h> 12 #include <asm/errata_list.h> 13 14 #define FLUSH_TLB_MAX_SIZE ((unsigned long)-1) 15 #define FLUSH_TLB_NO_ASID ((unsigned long)-1) 16 17 #ifdef CONFIG_MMU 18 extern unsigned long asid_mask; 19 20 static inline void local_flush_tlb_all(void) 21 { 22 __asm__ __volatile__ ("sfence.vma" : : : "memory"); 23 } 24 25 /* Flush one page from local TLB */ 26 static inline void local_flush_tlb_page(unsigned long addr) 27 { 28 ALT_FLUSH_TLB_PAGE(__asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory")); 29 } 30 #else /* CONFIG_MMU */ 31 #define local_flush_tlb_all() do { } while (0) 32 #define local_flush_tlb_page(addr) do { } while (0) 33 #endif /* CONFIG_MMU */ 34 35 #if defined(CONFIG_SMP) && defined(CONFIG_MMU) 36 void flush_tlb_all(void); 37 void flush_tlb_mm(struct mm_struct *mm); 38 void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, 39 unsigned long end, unsigned int page_size); 40 void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); 41 void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 42 unsigned long end); 43 void flush_tlb_kernel_range(unsigned long start, unsigned long end); 44 void local_flush_tlb_kernel_range(unsigned long start, unsigned long end); 45 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 46 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE 47 void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start, 48 unsigned long end); 49 #endif 50 51 bool arch_tlbbatch_should_defer(struct mm_struct *mm); 52 void arch_tlbbatch_add_pending(struct arch_tlbflush_unmap_batch *batch, 53 struct mm_struct *mm, 54 unsigned long uaddr); 55 void arch_flush_tlb_batched_pending(struct mm_struct *mm); 56 void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch); 57 58 #else /* CONFIG_SMP && CONFIG_MMU */ 59 60 #define flush_tlb_all() local_flush_tlb_all() 61 #define flush_tlb_page(vma, addr) local_flush_tlb_page(addr) 62 63 static inline void flush_tlb_range(struct vm_area_struct *vma, 64 unsigned long start, unsigned long end) 65 { 66 local_flush_tlb_all(); 67 } 68 69 /* Flush a range of kernel pages */ 70 static inline void flush_tlb_kernel_range(unsigned long start, 71 unsigned long end) 72 { 73 local_flush_tlb_all(); 74 } 75 76 #define flush_tlb_mm(mm) flush_tlb_all() 77 #define flush_tlb_mm_range(mm, start, end, page_size) flush_tlb_all() 78 #endif /* !CONFIG_SMP || !CONFIG_MMU */ 79 80 #endif /* _ASM_RISCV_TLBFLUSH_H */ 81