| 1 | /*
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| 2 | * Copyright (C) 2001-2004 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef __TLB_H__
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| 30 | #define __TLB_H__
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| 31 |
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| 32 | #include <arch/mm/asid.h>
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| 33 | #include <arch/types.h>
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| 34 | #include <typedefs.h>
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| 35 |
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| 36 | /**
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| 37 | * Number of TLB shootdown messages that can be queued in processor
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| 38 | * tlb_messages queue.
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| 39 | */
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| 40 | #define TLB_MESSAGE_QUEUE_LEN 10
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| 41 |
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| 42 | /** Type of TLB shootdown message. */
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| 43 | enum tlb_invalidate_type {
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| 44 | TLB_INVL_INVALID = 0, /**< Invalid type. */
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| 45 | TLB_INVL_ALL, /**< Invalidate all entries in TLB. */
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| 46 | TLB_INVL_ASID, /**< Invalidate all entries belonging to one address space. */
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| 47 | TLB_INVL_PAGES /**< Invalidate specified page range belonging to one address space. */
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| 48 | };
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| 49 | typedef enum tlb_invalidate_type tlb_invalidate_type_t;
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| 50 |
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| 51 | /** TLB shootdown message. */
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| 52 | struct tlb_shootdown_msg {
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| 53 | tlb_invalidate_type_t type; /**< Message type. */
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| 54 | asid_t asid; /**< Address space identifier. */
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| 55 | __address page; /**< Page address. */
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| 56 | count_t count; /**< Number of pages to invalidate. */
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| 57 | };
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| 58 | typedef struct tlb_shootdown_msg tlb_shootdown_msg_t;
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| 59 |
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| 60 | extern void tlb_init(void);
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| 61 |
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| 62 | #ifdef CONFIG_SMP
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| 63 | extern void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid, __address page, count_t count);
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| 64 | extern void tlb_shootdown_finalize(void);
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| 65 | extern void tlb_shootdown_ipi_recv(void);
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| 66 | #else
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| 67 | # define tlb_shootdown_start(w, x, y, z)
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| 68 | # define tlb_shootdown_finalize()
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| 69 | # define tlb_shootdown_ipi_recv()
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| 70 | #endif /* CONFIG_SMP */
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| 71 |
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| 72 |
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| 73 | /* Export TLB interface that each architecture must implement. */
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| 74 | extern void tlb_arch_init(void);
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| 75 | extern void tlb_print(void);
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| 76 | extern void tlb_shootdown_ipi_send(void);
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| 77 |
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| 78 | extern void tlb_invalidate_all(void);
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| 79 | extern void tlb_invalidate_asid(asid_t asid);
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| 80 | extern void tlb_invalidate_pages(asid_t asid, __address page, count_t cnt);
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| 81 | #endif
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