/[pcsx2_0.9.7]/trunk/pcsx2/MemoryTypes.h
ViewVC logotype

Contents of /trunk/pcsx2/MemoryTypes.h

Parent Directory Parent Directory | Revision Log Revision Log


Revision 62 - (show annotations) (download)
Tue Sep 7 11:08:22 2010 UTC (10 years, 1 month ago) by william
File MIME type: text/plain
File size: 4294 byte(s)
Auto Commited Import of: pcsx2-0.9.7-r3738-debug in ./trunk
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 Base = 0x02000000; // 32 MB main memory!
21 static const uint Rom = 0x00400000; // 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 = 0x00010000;
26 static const uint Scratch = 0x00004000;
27
28 static const uint IopRam = 0x00200000; // 2MB main ram on the IOP.
29 static const uint IopHardware = 0x00010000;
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 #define VTLB_UsePageFaulting 0
57
58 #if VTLB_UsePageFaulting
59
60 // The order of the components in this struct *matter* -- it has been laid out so that the
61 // full breadth of PS2 RAM and ROM mappings are directly supported.
62 struct EEVM_MemoryAllocMess
63 {
64 u8 (&Main)[Ps2MemSize::Base]; // Main memory (hard-wired to 32MB)
65
66 u8 _padding1[0x1e000000-Ps2MemSize::Base]
67 u8 (&ROM1)[Ps2MemSize::Rom1]; // DVD player
68
69 u8 _padding2[0x1e040000-(0x1e000000+Ps2MemSize::Rom1)]
70 u8 (&EROM)[Ps2MemSize::ERom]; // DVD player extensions
71
72 u8 _padding3[0x1e400000-(0x1e040000+Ps2MemSize::EROM)]
73 u8 (&ROM2)[Ps2MemSize::Rom2]; // Chinese extensions
74
75 u8 _padding4[0x1fc00000-(0x1e040000+Ps2MemSize::Rom2)];
76 u8 (&ROM)[Ps2MemSize::Rom]; // Boot rom (4MB)
77 };
78
79 #else
80
81 struct EEVM_MemoryAllocMess
82 {
83 u8 Scratch[Ps2MemSize::Scratch]; // Scratchpad!
84 u8 Main[Ps2MemSize::Base]; // Main memory (hard-wired to 32MB)
85 u8 ROM[Ps2MemSize::Rom]; // Boot rom (4MB)
86 u8 ROM1[Ps2MemSize::Rom1]; // DVD player
87 u8 ROM2[Ps2MemSize::Rom2]; // Chinese extensions
88 u8 EROM[Ps2MemSize::ERom]; // DVD player extensions
89
90 // Two 1 megabyte (max DMA) buffers for reading and writing to high memory (>32MB).
91 // Such accesses are not documented as causing bus errors but as the memory does
92 // not exist, reads should continue to return 0 and writes should be discarded.
93 // Probably.
94
95 u8 ZeroRead[_1mb];
96 u8 ZeroWrite[_1mb];
97 };
98
99 #endif
100
101 // EE Hardware registers.
102 // DevNote: These are done as a static array instead of a pointer in order to allow for simpler
103 // macros and reference handles to be defined (we can safely use compile-time references to
104 // registers instead of having to use instance variables).
105 extern __pagealigned u8 eeHw[Ps2MemSize::Hardware];
106
107
108 extern EEVM_MemoryAllocMess* eeMem;

  ViewVC Help
Powered by ViewVC 1.1.22