/[pcsx2_0.9.7]/trunk/pcsx2/MemoryTypes.h
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Contents of /trunk/pcsx2/MemoryTypes.h

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Revision 280 - (show annotations) (download)
Thu Dec 23 12:02:12 2010 UTC (9 years, 6 months ago) by william
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re-commit (had local access denied errors when committing)
1 /* PCSX2 - PS2 Emulator for PCs
2 * Copyright (C) 2002-2010 PCSX2 Dev Team
3 *
4 * PCSX2 is free software: you can redistribute it and/or modify it under the terms
5 * of the GNU Lesser General Public License as published by the Free Software Found-
6 * ation, either version 3 of the License, or (at your option) any later version.
7 *
8 * PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
9 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
10 * PURPOSE. See the GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License along with PCSX2.
13 * If not, see <http://www.gnu.org/licenses/>.
14 */
15
16 #pragma once
17
18 namespace Ps2MemSize
19 {
20 static const uint MainRam = _32mb; // 32 MB main memory!
21 static const uint Rom = _1mb * 4; // 4 MB main rom
22 static const uint Rom1 = 0x00040000; // DVD player
23 static const uint Rom2 = 0x00080000; // Chinese rom extension (?)
24 static const uint ERom = 0x001C0000; // DVD player extensions (?)
25 static const uint Hardware = _64kb;
26 static const uint Scratch = _16kb;
27
28 static const uint IopRam = _1mb * 2; // 2MB main ram on the IOP.
29 static const uint IopHardware = _64kb;
30
31 static const uint GSregs = 0x00002000; // 8k for the GS registers and stuff.
32 }
33
34 typedef u8 mem8_t;
35 typedef u16 mem16_t;
36 typedef u32 mem32_t;
37 typedef u64 mem64_t;
38 typedef u128 mem128_t;
39
40
41 // --------------------------------------------------------------------------------------
42 // Future-Planned VTLB pagefault scheme!
43 // --------------------------------------------------------------------------------------
44 // When enabled, the VTLB will use a large-area reserved memory range of 512megs for EE
45 // physical ram/rom access. The base ram will be committed at 0x00000000, and ROMs will be
46 // at 0x1fc00000, etc. All memory ranges in between will be uncommitted memory -- which
47 // means that the memory will *not* count against the operating system's physical memory
48 // pool.
49 //
50 // When the VTLB generates memory operations (loads/stores), it will assume that the op
51 // is addressing either RAM or ROM, and by assuming that it can generate a completely efficient
52 // direct memory access (one AND and one MOV instruction). If the access is to another area of
53 // memory, such as hardware registers or scratchpad, the access will generate a page fault, the
54 // compiled block will be cleared and re-compiled using "full" VTLB translation logic.
55 //
56 // Note that support for this feature may not be doable under x86/32 platforms, due to the
57 // 2gb/3gb limit of Windows XP (the 3gb feature will make it slightly more feasible at least).
58 //
59 #define VTLB_UsePageFaulting 0
60
61 #if VTLB_UsePageFaulting
62
63 // The order of the components in this struct *matter* -- it has been laid out so that the
64 // full breadth of PS2 RAM and ROM mappings are directly supported.
65 struct EEVM_MemoryAllocMess
66 {
67 u8 (&Main)[Ps2MemSize::MainRam]; // Main memory (hard-wired to 32MB)
68
69 u8 _padding1[0x1e000000-Ps2MemSize::MainRam]
70 u8 (&ROM1)[Ps2MemSize::Rom1]; // DVD player
71
72 u8 _padding2[0x1e040000-(0x1e000000+Ps2MemSize::Rom1)]
73 u8 (&EROM)[Ps2MemSize::ERom]; // DVD player extensions
74
75 u8 _padding3[0x1e400000-(0x1e040000+Ps2MemSize::EROM)]
76 u8 (&ROM2)[Ps2MemSize::Rom2]; // Chinese extensions
77
78 u8 _padding4[0x1fc00000-(0x1e040000+Ps2MemSize::Rom2)];
79 u8 (&ROM)[Ps2MemSize::Rom]; // Boot rom (4MB)
80 };
81
82 #else
83
84 struct EEVM_MemoryAllocMess
85 {
86 u8 Main[Ps2MemSize::MainRam]; // Main memory (hard-wired to 32MB)
87 u8 Scratch[Ps2MemSize::Scratch]; // Scratchpad!
88 u8 ROM[Ps2MemSize::Rom]; // Boot rom (4MB)
89 u8 ROM1[Ps2MemSize::Rom1]; // DVD player
90 u8 ROM2[Ps2MemSize::Rom2]; // Chinese extensions
91 u8 EROM[Ps2MemSize::ERom]; // DVD player extensions
92
93 // Two 1 megabyte (max DMA) buffers for reading and writing to high memory (>32MB).
94 // Such accesses are not documented as causing bus errors but as the memory does
95 // not exist, reads should continue to return 0 and writes should be discarded.
96 // Probably.
97
98 u8 ZeroRead[_1mb];
99 u8 ZeroWrite[_1mb];
100 };
101
102 #endif
103
104 struct IopVM_MemoryAllocMess
105 {
106 u8 Main[Ps2MemSize::IopRam]; // Main memory (hard-wired to 2MB)
107 u8 P[_64kb]; // I really have no idea what this is... --air
108 u8 Sif[0x100]; // a few special SIF/SBUS registers (likely not needed)
109 };
110
111
112 // DevNote: EE and IOP hardware registers are done as a static array instead of a pointer in
113 // order to allow for simpler macros and reference handles to be defined (we can safely use
114 // compile-time references to registers instead of having to use instance variables).
115
116 extern __pagealigned u8 eeHw[Ps2MemSize::Hardware];
117 extern __pagealigned u8 iopHw[Ps2MemSize::IopHardware];
118
119
120 extern EEVM_MemoryAllocMess* eeMem;
121 extern IopVM_MemoryAllocMess* iopMem;

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