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1 | jermar | 1 | /* |
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 | |||
29 | #ifndef __TLB_H__ |
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30 | #define __TLB_H__ |
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31 | |||
396 | jermar | 32 | #include <arch/mm/asid.h> |
597 | jermar | 33 | #include <arch/types.h> |
727 | jermar | 34 | #include <typedefs.h> |
396 | jermar | 35 | |
1002 | jermar | 36 | /** |
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 | |||
597 | jermar | 42 | /** Type of TLB shootdown message. */ |
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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727 | jermar | 47 | TLB_INVL_PAGES /**< Invalidate specified page range belonging to one address space. */ |
597 | jermar | 48 | }; |
49 | typedef enum tlb_invalidate_type tlb_invalidate_type_t; |
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50 | |||
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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1002 | jermar | 56 | count_t count; /**< Number of pages to invalidate. */ |
597 | jermar | 57 | }; |
58 | typedef struct tlb_shootdown_msg tlb_shootdown_msg_t; |
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59 | |||
727 | jermar | 60 | extern void tlb_init(void); |
61 | |||
62 | #ifdef CONFIG_SMP |
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1002 | jermar | 63 | extern void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid, __address page, count_t count); |
727 | jermar | 64 | extern void tlb_shootdown_finalize(void); |
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 | |||
72 | |||
5 | jermar | 73 | /* Export TLB interface that each architecture must implement. */ |
569 | jermar | 74 | extern void tlb_arch_init(void); |
75 | extern void tlb_print(void); |
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6 | jermar | 76 | extern void tlb_shootdown_ipi_send(void); |
1 | jermar | 77 | |
597 | jermar | 78 | extern void tlb_invalidate_all(void); |
79 | extern void tlb_invalidate_asid(asid_t asid); |
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727 | jermar | 80 | extern void tlb_invalidate_pages(asid_t asid, __address page, count_t cnt); |
1 | jermar | 81 | #endif |