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| 1 | jermar | 1 | /* |
| 319 | jermar | 2 | * Copyright (C) 2003-2004 Jakub Jermar |
| 1 | jermar | 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 | |||
| 341 | jermar | 29 | #ifndef __mips32_TLB_H__ |
| 30 | #define __mips32_TLB_H__ |
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| 1 | jermar | 31 | |
| 317 | palkovsky | 32 | #include <arch/exception.h> |
| 403 | jermar | 33 | #include <typedefs.h> |
| 317 | palkovsky | 34 | |
| 600 | jermar | 35 | #ifdef TLBCNT |
| 36 | # define TLB_ENTRY_COUNT TLBCNT |
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| 37 | #else |
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| 38 | # define TLB_ENTRY_COUNT 48 |
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| 39 | #endif |
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| 389 | jermar | 40 | |
| 41 | #define TLB_WIRED 1 |
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| 42 | #define TLB_KSTACK_WIRED_INDEX 0 |
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| 43 | |||
| 44 | #define TLB_PAGE_MASK_16K (0x3<<13) |
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| 45 | |||
| 121 | jermar | 46 | #define PAGE_UNCACHED 2 |
| 47 | #define PAGE_CACHEABLE_EXC_WRITE 5 |
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| 48 | |||
| 403 | jermar | 49 | typedef union entry_lo entry_lo_t; |
| 50 | typedef union entry_hi entry_hi_t; |
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| 51 | typedef union page_mask page_mask_t; |
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| 52 | typedef union index tlb_index_t; |
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| 53 | |||
| 396 | jermar | 54 | union entry_lo { |
| 55 | struct { |
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| 56 | unsigned g : 1; /* global bit */ |
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| 57 | unsigned v : 1; /* valid bit */ |
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| 58 | unsigned d : 1; /* dirty/write-protect bit */ |
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| 59 | unsigned c : 3; /* cache coherency attribute */ |
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| 60 | unsigned pfn : 24; /* frame number */ |
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| 399 | jermar | 61 | unsigned : 2; /* zero */ |
| 396 | jermar | 62 | } __attribute__ ((packed)); |
| 63 | __u32 value; |
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| 64 | }; |
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| 1 | jermar | 65 | |
| 831 | jermar | 66 | /** Page Table Entry. */ |
| 67 | struct pte { |
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| 68 | unsigned g : 1; /**< Global bit. */ |
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| 69 | unsigned p : 1; /**< Present bit. */ |
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| 70 | unsigned d : 1; /**< Dirty bit. */ |
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| 71 | unsigned cacheable : 1; /**< Cacheable bit. */ |
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| 72 | unsigned : 1; /**< Unused. */ |
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| 73 | unsigned soft_valid : 1; /**< Valid content even if not present. */ |
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| 74 | unsigned pfn : 24; /**< Physical frame number. */ |
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| 75 | unsigned w : 1; /**< Page writable bit. */ |
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| 76 | unsigned a : 1; /**< Accessed bit. */ |
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| 403 | jermar | 77 | }; |
| 394 | jermar | 78 | |
| 396 | jermar | 79 | union entry_hi { |
| 80 | struct { |
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| 81 | unsigned asid : 8; |
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| 82 | unsigned : 5; |
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| 83 | unsigned vpn2 : 19; |
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| 84 | } __attribute__ ((packed)); |
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| 85 | __u32 value; |
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| 86 | }; |
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| 1 | jermar | 87 | |
| 396 | jermar | 88 | union page_mask { |
| 89 | struct { |
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| 90 | unsigned : 13; |
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| 91 | unsigned mask : 12; |
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| 92 | unsigned : 7; |
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| 93 | } __attribute__ ((packed)); |
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| 94 | __u32 value; |
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| 95 | }; |
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| 1 | jermar | 96 | |
| 396 | jermar | 97 | union index { |
| 98 | struct { |
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| 99 | unsigned index : 4; |
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| 100 | unsigned : 27; |
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| 101 | unsigned p : 1; |
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| 102 | } __attribute__ ((packed)); |
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| 103 | __u32 value; |
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| 104 | }; |
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| 1 | jermar | 105 | |
| 394 | jermar | 106 | /** Probe TLB for Matching Entry |
| 107 | * |
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| 108 | * Probe TLB for Matching Entry. |
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| 109 | */ |
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| 110 | static inline void tlbp(void) |
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| 111 | { |
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| 112 | __asm__ volatile ("tlbp\n\t"); |
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| 113 | } |
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| 121 | jermar | 114 | |
| 394 | jermar | 115 | |
| 389 | jermar | 116 | /** Read Indexed TLB Entry |
| 117 | * |
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| 118 | * Read Indexed TLB Entry. |
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| 119 | */ |
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| 120 | static inline void tlbr(void) |
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| 121 | { |
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| 122 | __asm__ volatile ("tlbr\n\t"); |
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| 123 | } |
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| 124 | |||
| 125 | /** Write Indexed TLB Entry |
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| 126 | * |
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| 127 | * Write Indexed TLB Entry. |
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| 128 | */ |
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| 129 | static inline void tlbwi(void) |
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| 130 | { |
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| 131 | __asm__ volatile ("tlbwi\n\t"); |
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| 132 | } |
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| 133 | |||
| 134 | /** Write Random TLB Entry |
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| 135 | * |
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| 136 | * Write Random TLB Entry. |
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| 137 | */ |
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| 138 | static inline void tlbwr(void) |
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| 139 | { |
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| 140 | __asm__ volatile ("tlbwr\n\t"); |
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| 141 | } |
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| 142 | |||
| 599 | jermar | 143 | #define tlb_invalidate(asid) tlb_invalidate_asid(asid) |
| 144 | |||
| 317 | palkovsky | 145 | extern void tlb_invalid(struct exception_regdump *pstate); |
| 146 | extern void tlb_refill(struct exception_regdump *pstate); |
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| 389 | jermar | 147 | extern void tlb_modified(struct exception_regdump *pstate); |
| 1 | jermar | 148 | |
| 149 | #endif |