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 #ifdef CONFIG_MMU 15 extern unsigned long asid_mask; 16 17 static inline void local_flush_tlb_all(void) 18 { 19 __asm__ __volatile__ ("sfence.vma" : : : "memory"); 20 } 21 22 /* Flush one page from local TLB */ 23 static inline void local_flush_tlb_page(unsigned long addr) 24 { 25 ALT_FLUSH_TLB_PAGE(__asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory")); 26 } 27 #else /* CONFIG_MMU */ 28 #define local_flush_tlb_all() do { } while (0) 29 #define local_flush_tlb_page(addr) do { } while (0) 30 #endif /* CONFIG_MMU */ 31 32 #if defined(CONFIG_SMP) && defined(CONFIG_MMU) 33 void flush_tlb_all(void); 34 void flush_tlb_mm(struct mm_struct *mm); 35 void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); 36 void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 37 unsigned long end); 38 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 39 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE 40 void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start, 41 unsigned long end); 42 #endif 43 #else /* CONFIG_SMP && CONFIG_MMU */ 44 45 #define flush_tlb_all() local_flush_tlb_all() 46 #define flush_tlb_page(vma, addr) local_flush_tlb_page(addr) 47 48 static inline void flush_tlb_range(struct vm_area_struct *vma, 49 unsigned long start, unsigned long end) 50 { 51 local_flush_tlb_all(); 52 } 53 54 #define flush_tlb_mm(mm) flush_tlb_all() 55 #endif /* !CONFIG_SMP || !CONFIG_MMU */ 56 57 /* Flush a range of kernel pages */ 58 static inline void flush_tlb_kernel_range(unsigned long start, 59 unsigned long end) 60 { 61 flush_tlb_all(); 62 } 63 64 #endif /* _ASM_RISCV_TLBFLUSH_H */ 65