Rev 4490 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 2163 | jancik | 1 | /* |
| 2238 | kebrt | 2 | * Copyright (c) 2007 Michal Kebrt |
| 2163 | jancik | 3 | * All rights reserved. |
| 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 | /** @addtogroup arm32mm |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 2410 | stepan | 33 | * @brief TLB related functions. |
| 2163 | jancik | 34 | */ |
| 35 | |||
| 36 | #include <mm/tlb.h> |
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| 37 | #include <arch/mm/asid.h> |
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| 38 | #include <arch/asm.h> |
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| 39 | #include <arch/types.h> |
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| 40 | #include <arch/mm/page.h> |
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| 41 | |||
| 2415 | kebrt | 42 | /** Invalidate all entries in TLB. |
| 43 | * |
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| 44 | * @note See ARM Architecture reference section 3.7.7 for details. |
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| 45 | */ |
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| 2163 | jancik | 46 | void tlb_invalidate_all(void) |
| 47 | { |
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| 2238 | kebrt | 48 | asm volatile ( |
| 2163 | jancik | 49 | "eor r1, r1\n" |
| 2415 | kebrt | 50 | "mcr p15, 0, r1, c8, c7, 0\n" |
| 4018 | decky | 51 | ::: "r1" |
| 2163 | jancik | 52 | ); |
| 53 | } |
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| 54 | |||
| 55 | /** Invalidate all entries in TLB that belong to specified address space. |
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| 56 | * |
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| 2415 | kebrt | 57 | * @param asid Ignored as the ARM architecture doesn't support ASIDs. |
| 2163 | jancik | 58 | */ |
| 59 | void tlb_invalidate_asid(asid_t asid) |
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| 60 | { |
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| 61 | tlb_invalidate_all(); |
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| 62 | } |
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| 63 | |||
| 64 | /** Invalidate single entry in TLB |
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| 2361 | jancik | 65 | * |
| 2163 | jancik | 66 | * @param page Virtual adress of the page |
| 67 | */ |
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| 2238 | kebrt | 68 | static inline void invalidate_page(uintptr_t page) |
| 2163 | jancik | 69 | { |
| 70 | asm volatile ( |
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| 4018 | decky | 71 | "mcr p15, 0, %[page], c8, c7, 1\n" |
| 72 | :: [page] "r" (page) |
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| 2199 | jancik | 73 | ); |
| 2163 | jancik | 74 | } |
| 75 | |||
| 2464 | jermar | 76 | /** Invalidate TLB entries for specified page range belonging to specified |
| 77 | * address space. |
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| 2163 | jancik | 78 | * |
| 2415 | kebrt | 79 | * @param asid Ignored as the ARM architecture doesn't support it. |
| 2163 | jancik | 80 | * @param page Address of the first page whose entry is to be invalidated. |
| 81 | * @param cnt Number of entries to invalidate. |
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| 82 | */ |
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| 4490 | decky | 83 | void tlb_invalidate_pages(asid_t asid __attribute__((unused)), uintptr_t page, size_t cnt) |
| 2163 | jancik | 84 | { |
| 85 | unsigned int i; |
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| 86 | |||
| 87 | for (i = 0; i < cnt; i++) |
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| 2238 | kebrt | 88 | invalidate_page(page + i * PAGE_SIZE); |
| 2163 | jancik | 89 | } |
| 90 | |||
| 3940 | decky | 91 | void tlb_arch_init(void) |
| 92 | { |
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| 93 | } |
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| 94 | |||
| 95 | void tlb_print(void) |
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| 96 | { |
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| 97 | } |
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| 98 | |||
| 2163 | jancik | 99 | /** @} |
| 100 | */ |