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Directory :  /usr/src/linux-headers-5.15.0-142/arch/riscv/include/asm/

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Current File : /usr/src/linux-headers-5.15.0-142/arch/riscv/include/asm/tlbflush.h
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2009 Chen Liqin <[email protected]>
 * 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>
#include <asm/errata_list.h>

#ifdef CONFIG_MMU
extern unsigned long asid_mask;

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)
{
	ALT_FLUSH_TLB_PAGE(__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);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
			unsigned long end);
#endif
#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 */

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