1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
Copyright 2016-2017 StapleButter
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with melonDS. If not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include "NDS.h"
namespace CP15
{
u32 Control;
u32 DTCMSetting, ITCMSetting;
void Reset()
{
Control = 0x78; // dunno
DTCMSetting = 0;
ITCMSetting = 0;
}
void UpdateDTCMSetting()
{
if (Control & (1<<16))
{
NDS::ARM9DTCMBase = DTCMSetting & 0xFFFFF000;
NDS::ARM9DTCMSize = 0x200 << ((DTCMSetting >> 1) & 0x1F);
printf("DTCM enabled at %08X, size %X\n", NDS::ARM9DTCMBase, NDS::ARM9DTCMSize);
}
else
{
NDS::ARM9DTCMBase = 0xFFFFFFFF;
NDS::ARM9DTCMSize = 0;
printf("DTCM disabled\n");
}
}
void UpdateITCMSetting()
{
if (Control & (1<<18))
{
NDS::ARM9ITCMSize = 0x200 << ((ITCMSetting >> 1) & 0x1F);
printf("ITCM enabled at %08X, size %X\n", 0, NDS::ARM9ITCMSize);
}
else
{
NDS::ARM9ITCMSize = 0;
printf("ITCM disabled\n");
}
}
void Write(u32 id, u32 val)
{
switch (id)
{
case 0x100:
val &= 0x000FF085;
Control &= ~0x000FF085;
Control |= val;
UpdateDTCMSetting();
UpdateITCMSetting();
return;
case 0x910:
DTCMSetting = val;
UpdateDTCMSetting();
return;
case 0x911:
ITCMSetting = val;
UpdateITCMSetting();
return;
}
}
u32 Read(u32 id)
{
switch (id)
{
case 0x000: // CPU ID
case 0x003:
case 0x004:
case 0x005:
case 0x006:
case 0x007:
return 0x41059461;
case 0x001:
// cache type. todo
return 0;
case 0x002: // TCM size
return (6 << 6) | (5 << 18);
case 0x100: // control reg
return Control;
case 0x910:
return DTCMSetting;
case 0x911:
return ITCMSetting;
}
return 0;
}
}
|