tlb.h

/*
 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _ASM_ARC_TLB_H
#define _ASM_ARC_TLB_H

#ifdef __KERNEL__

#include <asm/pgtable.h>

/* Masks for actual TLB "PD"s */
#define PTE_BITS_IN_PD0	(_PAGE_GLOBAL | _PAGE_PRESENT)
#define PTE_BITS_IN_PD1	(PAGE_MASK | _PAGE_CACHEABLE | \
			 _PAGE_U_EXECUTE | _PAGE_U_WRITE | _PAGE_U_READ | \
			 _PAGE_K_EXECUTE | _PAGE_K_WRITE | _PAGE_K_READ)

#ifndef __ASSEMBLY__

#define tlb_flush(tlb)				\
do {						\
	if (tlb->fullmm)			\
		flush_tlb_mm((tlb)->mm);	\
} while (0)

/*
 * This pair is called at time of munmap/exit to flush cache and TLB entries
 * for mappings being torn down.
 * 1) cache-flush part -implemented via tlb_start_vma( ) for VIPT aliasing D$
 * 2) tlb-flush part - implemted via tlb_end_vma( ) flushes the TLB range
 *
 * Note, read http://lkml.org/lkml/2004/1/15/6
 */
#ifndef CONFIG_ARC_CACHE_VIPT_ALIASING
#define tlb_start_vma(tlb, vma)
#else
#define tlb_start_vma(tlb, vma)						\
do {									\
	if (!tlb->fullmm)						\
		flush_cache_range(vma, vma->vm_start, vma->vm_end);	\
} while(0)
#endif

#define tlb_end_vma(tlb, vma)						\
do {									\
	if (!tlb->fullmm)						\
		flush_tlb_range(vma, vma->vm_start, vma->vm_end);	\
} while (0)

#define __tlb_remove_tlb_entry(tlb, ptep, address)

#include <linux/pagemap.h>
#include <asm-generic/tlb.h>

#ifdef CONFIG_ARC_DBG_TLB_PARANOIA
void tlb_paranoid_check(unsigned int pid_sw, unsigned long address);
#else
#define tlb_paranoid_check(a, b)
#endif

void arc_mmu_init(void);
extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len);
void __init read_decode_mmu_bcr(void);

#endif	/* __ASSEMBLY__ */

#endif	/* __KERNEL__ */

#endif /* _ASM_ARC_TLB_H */