diff options
Diffstat (limited to 'arch/riscv/include/asm/tlbflush.h')
| -rw-r--r-- | arch/riscv/include/asm/tlbflush.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/tlbflush.h b/arch/riscv/include/asm/tlbflush.h new file mode 100644 index 000000000..394cfbccd --- /dev/null +++ b/arch/riscv/include/asm/tlbflush.h @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com> + * Copyright (C) 2012 Regents of the University of California + */ + +#ifndef _ASM_RISCV_TLBFLUSH_H +#define _ASM_RISCV_TLBFLUSH_H + +#include <linux/mm_types.h> +#include <asm/smp.h> + +#ifdef CONFIG_MMU +static inline void local_flush_tlb_all(void) +{ + __asm__ __volatile__ ("sfence.vma" : : : "memory"); +} + +/* Flush one page from local TLB */ +static inline void local_flush_tlb_page(unsigned long addr) +{ + __asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory"); +} +#else /* CONFIG_MMU */ +#define local_flush_tlb_all() do { } while (0) +#define local_flush_tlb_page(addr) do { } while (0) +#endif /* CONFIG_MMU */ + +#if defined(CONFIG_SMP) && defined(CONFIG_MMU) +void flush_tlb_all(void); +void flush_tlb_mm(struct mm_struct *mm); +void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); +void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, + unsigned long end); +#else /* CONFIG_SMP && CONFIG_MMU */ + +#define flush_tlb_all() local_flush_tlb_all() +#define flush_tlb_page(vma, addr) local_flush_tlb_page(addr) + +static inline void flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + local_flush_tlb_all(); +} + +#define flush_tlb_mm(mm) flush_tlb_all() +#endif /* !CONFIG_SMP || !CONFIG_MMU */ + +/* Flush a range of kernel pages */ +static inline void flush_tlb_kernel_range(unsigned long start, + unsigned long end) +{ + flush_tlb_all(); +} + +#endif /* _ASM_RISCV_TLBFLUSH_H */ |