451ab91e |
1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
2 | * Mupen64plus - tlb.c * |
3 | * Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ * |
4 | * Copyright (C) 2002 Hacktarux * |
5 | * * |
6 | * This program is free software; you can redistribute it and/or modify * |
7 | * it under the terms of the GNU General Public License as published by * |
8 | * the Free Software Foundation; either version 2 of the License, or * |
9 | * (at your option) any later version. * |
10 | * * |
11 | * This program is distributed in the hope that it will be useful, * |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
14 | * GNU General Public License for more details. * |
15 | * * |
16 | * You should have received a copy of the GNU General Public License * |
17 | * along with this program; if not, write to the * |
18 | * Free Software Foundation, Inc., * |
19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * |
20 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
21 | |
22 | #include <string.h> |
23 | |
24 | #include "api/m64p_types.h" |
25 | |
26 | #include "memory.h" |
27 | |
28 | #include "r4300/r4300.h" |
29 | #include "r4300/exception.h" |
30 | #include "r4300/macros.h" |
31 | #include "main/rom.h" |
32 | |
33 | unsigned int tlb_LUT_r[0x100000]; |
34 | unsigned int tlb_LUT_w[0x100000]; |
35 | |
36 | void tlb_unmap(tlb *entry) |
37 | { |
38 | unsigned int i; |
39 | |
40 | if (entry->v_even) |
41 | { |
42 | for (i=entry->start_even; i<entry->end_even; i += 0x1000) |
43 | tlb_LUT_r[i>>12] = 0; |
44 | if (entry->d_even) |
45 | for (i=entry->start_even; i<entry->end_even; i += 0x1000) |
46 | tlb_LUT_w[i>>12] = 0; |
47 | } |
48 | |
49 | if (entry->v_odd) |
50 | { |
51 | for (i=entry->start_odd; i<entry->end_odd; i += 0x1000) |
52 | tlb_LUT_r[i>>12] = 0; |
53 | if (entry->d_odd) |
54 | for (i=entry->start_odd; i<entry->end_odd; i += 0x1000) |
55 | tlb_LUT_w[i>>12] = 0; |
56 | } |
57 | } |
58 | |
59 | void tlb_map(tlb *entry) |
60 | { |
61 | unsigned int i; |
62 | |
63 | if (entry->v_even) |
64 | { |
65 | if (entry->start_even < entry->end_even && |
66 | !(entry->start_even >= 0x80000000 && entry->end_even < 0xC0000000) && |
67 | entry->phys_even < 0x20000000) |
68 | { |
69 | for (i=entry->start_even;i<entry->end_even;i+=0x1000) |
70 | tlb_LUT_r[i>>12] = 0x80000000 | (entry->phys_even + (i - entry->start_even) + 0xFFF); |
71 | if (entry->d_even) |
72 | for (i=entry->start_even;i<entry->end_even;i+=0x1000) |
73 | tlb_LUT_w[i>>12] = 0x80000000 | (entry->phys_even + (i - entry->start_even) + 0xFFF); |
74 | } |
75 | } |
76 | |
77 | if (entry->v_odd) |
78 | { |
79 | if (entry->start_odd < entry->end_odd && |
80 | !(entry->start_odd >= 0x80000000 && entry->end_odd < 0xC0000000) && |
81 | entry->phys_odd < 0x20000000) |
82 | { |
83 | for (i=entry->start_odd;i<entry->end_odd;i+=0x1000) |
84 | tlb_LUT_r[i>>12] = 0x80000000 | (entry->phys_odd + (i - entry->start_odd) + 0xFFF); |
85 | if (entry->d_odd) |
86 | for (i=entry->start_odd;i<entry->end_odd;i+=0x1000) |
87 | tlb_LUT_w[i>>12] = 0x80000000 | (entry->phys_odd + (i - entry->start_odd) + 0xFFF); |
88 | } |
89 | } |
90 | } |
91 | |
92 | unsigned int virtual_to_physical_address(unsigned int addresse, int w) |
93 | { |
94 | if (addresse >= 0x7f000000 && addresse < 0x80000000 && isGoldeneyeRom) |
95 | { |
96 | /************************************************** |
97 | GoldenEye 007 hack allows for use of TLB. |
98 | Recoded by okaygo to support all US, J, and E ROMS. |
99 | **************************************************/ |
100 | switch (ROM_HEADER.Country_code & 0xFF) |
101 | { |
102 | case 0x45: |
103 | // U |
104 | return 0xb0034b30 + (addresse & 0xFFFFFF); |
105 | break; |
106 | case 0x4A: |
107 | // J |
108 | return 0xb0034b70 + (addresse & 0xFFFFFF); |
109 | break; |
110 | case 0x50: |
111 | // E |
112 | return 0xb00329f0 + (addresse & 0xFFFFFF); |
113 | break; |
114 | default: |
115 | // UNKNOWN COUNTRY CODE FOR GOLDENEYE USING AMERICAN VERSION HACK |
116 | return 0xb0034b30 + (addresse & 0xFFFFFF); |
117 | break; |
118 | } |
119 | } |
120 | if (w == 1) |
121 | { |
122 | if (tlb_LUT_w[addresse>>12]) |
123 | return (tlb_LUT_w[addresse>>12]&0xFFFFF000)|(addresse&0xFFF); |
124 | } |
125 | else |
126 | { |
127 | if (tlb_LUT_r[addresse>>12]) |
128 | return (tlb_LUT_r[addresse>>12]&0xFFFFF000)|(addresse&0xFFF); |
129 | } |
130 | //printf("tlb exception !!! @ %x, %x, add:%x\n", addresse, w, PC->addr); |
131 | //getchar(); |
132 | TLB_refill_exception(addresse,w); |
133 | //return 0x80000000; |
134 | return 0x00000000; |
135 | } |