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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*------------------------------------------------------*/
/* TERON Articia / SDRAM Init */
/*------------------------------------------------------*/
* XD_CTL = 0x81000000 (0x74)
* HBUS_ACC_CTL_0 &= 0xFFFFFDFF (0x5c)
/* host bus access ctl reg 2(5e) */
/* set - CPU read from memory data one clock after data is latched */
* GLOBL_INFO_0 |= 0x00004000 (0x50)
/* global info register 2 (52), AGP/PCI bus 1 arbiter is addressed in Articia S */
PCI_1_SB_CONFIG_0 |= 0x00000400 (0x80d0)
/* PCI1 side band config reg 2 (d2), enable read acces while write buffer not empty */
MEM_RAS_CTL_0 |= 0x3f000000 (0xcc)
&= 0x3fffffff
/* RAS park control reg 0(cc), park access enable is set */
HOST_RDBUF_CTL |= 0x10000000 (0x70)
&= 0x10ffffff
/* host read buffer control reg, enable prefetch for CPU read from DRAM control */
HBUS_ACC_CTL_0 |= 0x0100001f (0x5c)
&= 0xf1ffffff
/* host bus access control register, enable CPU address bus pipe control */
/* two outstanding requests, *** changed to 2 from 3 */
/* enable line merge write control for CPU write to system memory, PCI 1 */
/* and PCI 0 bus memory; enable page merge write control for write to */
/* PCI bus 0 & bus 1 memory */
SRAM_CTL |= 0x00004000 (0xc8)
&= 0xffbff7ff
/* DRAM detail timing control register 1 (ca), bit 3 set to 0 */
/* DRAM start access latency control - wait for one clock */
/* ff9f changed to ffbf */
DIM0_TIM_CTL_0 = 0x737d737d (0xc9)
/* DRAM timing control for dimm0 & dimm1; set wait one clock */
/* cycle for next data access */
DIM2_TIM_CTL_0 = 0x737d737d (0xca)
/* DRAM timing control for dimm2 & dimm3; set wait one clock */
/* cycle for next data access */
DIM0_BNK0_CTL_0 = BNK0_RAM_SIZ_128MB (0x90)
/* set dimm0 bank0 for 128 MB */
DIM0_BNK1_CTL_0 = BNK1_RAM_SIZ_128MB (0x94)
/* set dimm0 for bank1 */
DIM0_TIM_CTL_0 = 0xf3bf0000 (0xc9)
/* dimm0 timing control register; RAS - CAS latency - 4 clock */
/* CAS access latency - 3 wait; pre-charge latency - 3 wait */
/* pre-charge command period control - 5 clock; wait one clock */
/* cycle for next data access; read to write access latency control */
/* - 2 clock cycles */
DRAM_GBL_CTL_0 |= 0x00000100 (0xc0)
&= 0xffff01ff
/* memory global control register - support buffer sdram on bank 0 */
DRAM_ECC_CTL_0 |= 0x00260000 (0xc4)
&= 0xff26ffff
/* enable ECC; enable read, modify, write control */
DRAM_REF_CTL_0 = DRAM_REF_DATA (0xb8)
/* set DRAM refresh parameters *** changed to 00940100 */
nop
nop
nop
nop
nop
DRAM_ECC_CTL_0 |= 0x20243280 (0xc4)
/* turn off ecc */
/* for SDRAM bank 0 */
DRAM_ECC_CTL_0 |= 0x20243290 (0xc4) ?
/* for SDRAM bank 1 */
/* Additional Stuff...*/
GLOBL_CTRL |= 0x20000b00 (0x54)
PCI_0_SB_CONFIG |= 0x04100007 (0xd0)
/* PCI 0 Side band config reg*/
0x8000083c |= 0x00080000
/* Disable VGA decode on PCI Bus 1 */
/*End Additional Stuff..*/
/*--------------------------------------------------------------*/
/* TERON serial port initialization code */
/*--------------------------------------------------------------*/
0x84380080 |= 0x00030000
/* enable super IO configuration VIA chip Register 85 */
/* Enable super I/O config mode */
0xfe0003f0 = 0xe2
bl delay1
0xfe0003f1 = 0x0f
bl delay1
/* enable com1 & com2, parallel port disabled */
0xfe0003f0 = 0xe7
bl delay1
/* let's make com1 base as 0x3f8 */
0xfe0003f1 = 0xfe
bl delay1
0xfe0003f0 = 0xe8
bl delay1
/* let's make com2 base as 0x2f8 */
0xfe0003f1 = 0xbe
0x84380080 &= 0xfffdffff
/* closing super IO configuration VIA chip Register 85 */
/* -------------------------------*/
0xfe0003fb = 0x83
bl delay1
/*latch enable word length -8 bit */ /* set mslab bit */
0xfe0003f8 = 0x0c
bl delay1
/* set baud rate lsb for 9600 baud */
0xfe0003f9 = 0x0
bl delay1
/* set baud rate msb for 9600 baud */
0xfe0003fb = 0x03
bl delay1
/* reset mslab */
/*--------------------------------------------------------------*/
/* END TERON Serial Port Initialization Code */
/*--------------------------------------------------------------*/
/*--------------------------------------------------------------*/
/* END TERON Articia / SDRAM Initialization code */
/*--------------------------------------------------------------*/
Proposed from Documentation:
write dmem 0xfec00cf8 0x50000080
write dmem 0xfee00cfc 0xc0305411
Writes to index 0x50-0x53.
0x50: Global Information Register 0
0xC0 = Little Endian CPU, Sequential order Burst
0x51: Global Information Register 1
Read only, 0x30 = Provides PowerPC and X86 support
0x52: Global Information Register 2
0x05 = 64/128 bit CPU bus support
0x53: Global Information Register 3
0x80 = PCI Bus 0 grant active time is 1 clock after REQ# deasserted
write dmem 0xfec00cf8 0x5c000080
write dmem 0xfee00cfc 0xb300011F
write dmem 0xfec00cf8 0xc8000080
write dmem 0xfee00cfc 0x0020f100
write dmem 0xfec00cf8 0x90000080
write dmem 0xfee00cfc 0x007fe700
write dmem 0xfec00cf8 0x9400080
write dmem 0xfee00cfc 0x007fe700
write dmem 0xfec00cf8 0xb0000080
write dmem 0xfee00cfc 0x737d737d
write dmem 0xfec00cf8 0xb4000080
write dmem 0xfee00cfc 0x737d737d
write dmem 0xfec00cf8 0xc0000080
write dmem 0xfee00cfc 0x40005500
write dmem 0xfec00cf8 0xb8000080
write dmem 0xfee00cfc 0x00940100
write dmem 0xfec00cf8 0xc4000080
write dmem 0xfee00cfc 0x00003280
write dmem 0xfec00cf8 0xc4000080
write dmem 0xfee00cfc 0x00003290
|
