source: mainline/generic/include/mm/tlb.h@ ff75d34

/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __TLB_H__
#define __TLB_H__

#include <arch/mm/asid.h>
#include <arch/types.h>
#include <typedefs.h>

/**
 * Number of TLB shootdown messages that can be queued in processor
 * tlb_messages queue.
 */
#define TLB_MESSAGE_QUEUE_LEN   10

/** Type of TLB shootdown message. */
enum tlb_invalidate_type {
        TLB_INVL_INVALID = 0,           /**< Invalid type. */
        TLB_INVL_ALL,                   /**< Invalidate all entries in TLB. */
        TLB_INVL_ASID,                  /**< Invalidate all entries belonging to one address space. */
        TLB_INVL_PAGES                  /**< Invalidate specified page range belonging to one address space. */
};
typedef enum tlb_invalidate_type tlb_invalidate_type_t;

/** TLB shootdown message. */
struct tlb_shootdown_msg {
        tlb_invalidate_type_t type;     /**< Message type. */
        asid_t asid;                    /**< Address space identifier. */
        __address page;                 /**< Page address. */
        count_t count;                  /**< Number of pages to invalidate. */
};
typedef struct tlb_shootdown_msg tlb_shootdown_msg_t;

extern void tlb_init(void);

#ifdef CONFIG_SMP
extern void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid, __address page, count_t count);
extern void tlb_shootdown_finalize(void);
extern void tlb_shootdown_ipi_recv(void);
#else
#  define tlb_shootdown_start(w, x, y, z)
#  define tlb_shootdown_finalize()
#  define tlb_shootdown_ipi_recv()
#endif /* CONFIG_SMP */


/* Export TLB interface that each architecture must implement. */
extern void tlb_arch_init(void);
extern void tlb_print(void);
extern void tlb_shootdown_ipi_send(void);

extern void tlb_invalidate_all(void);
extern void tlb_invalidate_asid(asid_t asid);
extern void tlb_invalidate_pages(asid_t asid, __address page, count_t cnt);
#endif