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1 jermar 1
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#ifndef __TLB_H__
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#define __TLB_H__
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#include <arch/mm/asid.h>
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#include <arch/types.h>
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#include <typedefs.h>
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/**
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 * Number of TLB shootdown messages that can be queued in processor
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 * tlb_messages queue.
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 */
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#define TLB_MESSAGE_QUEUE_LEN   10
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/** Type of TLB shootdown message. */
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enum tlb_invalidate_type {
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    TLB_INVL_INVALID = 0,       /**< Invalid type. */
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    TLB_INVL_ALL,           /**< Invalidate all entries in TLB. */
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    TLB_INVL_ASID,          /**< Invalidate all entries belonging to one address space. */
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    TLB_INVL_PAGES          /**< Invalidate specified page range belonging to one address space. */
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};
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typedef enum tlb_invalidate_type tlb_invalidate_type_t;
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/** TLB shootdown message. */
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struct tlb_shootdown_msg {
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    tlb_invalidate_type_t type; /**< Message type. */
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    asid_t asid;            /**< Address space identifier. */
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    __address page;         /**< Page address. */
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    count_t count;          /**< Number of pages to invalidate. */
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};
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typedef struct tlb_shootdown_msg tlb_shootdown_msg_t;
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extern void tlb_init(void);
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#ifdef CONFIG_SMP
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extern void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid, __address page, count_t count);
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extern void tlb_shootdown_finalize(void);
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extern void tlb_shootdown_ipi_recv(void);
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#else
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#  define tlb_shootdown_start(w, x, y, z)
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#  define tlb_shootdown_finalize()
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#  define tlb_shootdown_ipi_recv()
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#endif /* CONFIG_SMP */
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/* Export TLB interface that each architecture must implement. */
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extern void tlb_arch_init(void);
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extern void tlb_print(void);
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extern void tlb_shootdown_ipi_send(void);
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extern void tlb_invalidate_all(void);
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extern void tlb_invalidate_asid(asid_t asid);
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extern void tlb_invalidate_pages(asid_t asid, __address page, count_t cnt);
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#endif