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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 __mips_TLB_H__ |
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| 30 | #define __mips_TLB_H__ |
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| 31 | |||
| 121 | jermar | 32 | #define PAGE_UNCACHED 2 |
| 33 | #define PAGE_CACHEABLE_EXC_WRITE 5 |
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| 34 | |||
| 1 | jermar | 35 | struct entry_lo { |
| 121 | jermar | 36 | unsigned g : 1; /* global bit */ |
| 37 | unsigned v : 1; /* valid bit */ |
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| 38 | unsigned d : 1; /* dirty/write-protect bit */ |
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| 39 | unsigned c : 3; /* cache coherency attribute */ |
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| 40 | unsigned pfn : 24; /* frame number */ |
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| 1 | jermar | 41 | unsigned : 2; |
| 42 | } __attribute__ ((packed)); |
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| 43 | |||
| 44 | struct entry_hi { |
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| 45 | unsigned asid : 8; |
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| 46 | unsigned : 4; |
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| 47 | unsigned g : 1; |
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| 48 | unsigned vpn2 : 19; |
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| 49 | } __attribute__ ((packed)); |
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| 50 | |||
| 51 | struct page_mask { |
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| 52 | unsigned : 13; |
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| 53 | unsigned mask : 12; |
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| 54 | unsigned : 7; |
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| 55 | } __attribute__ ((packed)); |
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| 56 | |||
| 57 | struct tlb_entry { |
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| 58 | struct entry_lo lo0; |
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| 59 | struct entry_lo lo1; |
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| 60 | struct entry_hi hi; |
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| 61 | struct page_mask mask; |
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| 62 | } __attribute__ ((packed)); |
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| 63 | |||
| 121 | jermar | 64 | typedef struct entry_lo pte_t; |
| 65 | |||
| 1 | jermar | 66 | extern void tlb_refill(void); |
| 67 | extern void tlb_invalid(void); |
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| 68 | |||
| 69 | #endif |