diff options
Diffstat (limited to 'arch/hexagon/include/asm/tlbflush.h')
| -rw-r--r-- | arch/hexagon/include/asm/tlbflush.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/tlbflush.h b/arch/hexagon/include/asm/tlbflush.h new file mode 100644 index 0000000000..a7c9ab398c --- /dev/null +++ b/arch/hexagon/include/asm/tlbflush.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * TLB flush support for Hexagon + * + * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + */ + +#ifndef _ASM_TLBFLUSH_H +#define _ASM_TLBFLUSH_H + +#include <linux/mm.h> +#include <asm/processor.h> + +/* + * TLB flushing -- in "SMP", these routines get defined to be the + * ones from smp.c, else they are some local flavors. + */ + +/* + * These functions are commonly macros, but in the interests of + * VM vs. native implementation and code size, we simply declare + * the function prototypes here. + */ +extern void tlb_flush_all(void); +extern void flush_tlb_mm(struct mm_struct *mm); +extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); +extern void flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); +extern void flush_tlb_one(unsigned long); + +/* + * "This is called in munmap when we have freed up some page-table pages. + * We don't need to do anything here..." + * + * The VM kernel doesn't walk page tables, and they are passed to the VMM + * by logical address. There doesn't seem to be any possibility that they + * could be referenced by the VM kernel based on a stale mapping, since + * they would only be located by consulting the mm structure, and they + * will have been purged from that structure by the munmap. Seems like + * a noop on HVM as well. + */ +#define flush_tlb_pgtables(mm, start, end) + +#endif |