intel 845GV ddr sdram init

zhu shi song zhushisongzhu at yahoo.com
Thu Sep 16 07:24:01 CEST 2004


progress on my P4i845GV MB(845GV/82801DB/WB83627HF)
(1) setup serial correctly
(2) read spd data correctly
(3) setup DRB(?), DRA, DRT, DRC
(4) RAM_NOP hlt when launching ram read
output log :

LinuxBIOS-1.0.0 Sep 16 18:47:16 CST 2004 starting...
Ram1
dump northbridge: 
00: 86 80 60 25 06 00 90 00 03 00 00 06 00 00 00 00 
10: 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
30: 00 00 00 00 e4 00 00 00 00 00 00 00 00 00 00 00 
40: 00 00 00 00 00 00 00 00 00 00 00 00 1b 08 10 00 
50: 00 00 00 00 00 00 00 00 1b 16 00 00 37 2c 37 2c 
60: 01 01 01 01 00 00 00 00 00 00 00 00 00 00 00 00 
70: 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 
80: 00 00 20 00 ad 00 00 00 06 00 00 00 00 00 00 00 
90: 00 00 00 00 00 00 00 00 45 04 00 00 00 02 38 00 
a0: 02 00 20 00 17 02 00 1f 00 00 00 00 00 00 00 00 
b0: 00 00 00 00 00 00 00 00 00 00 00 00 10 10 00 00 
c0: 44 40 30 11 00 00 0c 0e 00 00 00 00 00 00 00 00 
d0: 02 28 04 0e 0b 0d 00 10 00 00 11 b3 00 00 00 00 
e0: 00 00 00 00 09 00 05 11 21 00 00 00 00 00 00 00 
f0: 00 00 00 00 74 f8 00 00 40 0f 00 00 00 00 00 00 
Done.
C:0000002c:00000000:25601849
C:00000090:00000000:03333333
C:00000094:00000000:00110000
C:00000098:0000ffff:00000445
C:0000009c:ff0000ff:00380a00
C:00000060:00000000:80604020
C:00000070:00000000:00000000
C:00000078:00007190:2b418205
C:0000007c:0000007f:2000c100
dump northbridge: 
00: 86 80 60 25 06 00 90 00 03 00 00 06 00 00 00 00 
10: 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
20: 00 00 00 00 00 00 00 00 00 00 00 00 49 18 60 25 
30: 00 00 00 00 e4 00 00 00 00 00 00 00 00 00 00 00 
40: 00 00 00 00 00 00 00 00 00 00 00 00 1b 08 10 00 
50: 00 00 00 00 00 00 00 00 1b 16 00 00 37 2c 37 2c 
60: 20 40 60 80 00 00 00 00 00 00 00 00 00 00 00 00 
70: 00 00 00 00 00 00 00 00 05 82 41 2b 01 c1 00 20 
80: 00 00 20 00 ad 00 00 00 06 00 00 00 00 00 00 00 
90: 30 33 33 03 00 00 11 00 45 04 00 00 00 0a 38 00 
a0: 02 00 20 00 17 02 00 1f 00 00 00 00 00 00 00 00 
b0: 00 00 00 00 00 00 00 00 00 00 00 00 10 10 00 00 
c0: 44 40 30 11 00 00 0c 0e 00 00 00 00 00 00 00 00 
d0: 02 28 04 0e 0b 0d 00 10 00 00 11 b3 00 00 00 00 
e0: 00 00 00 00 09 00 05 11 21 00 00 00 00 00 00 00 
f0: 00 00 00 00 74 f8 00 00 40 0f 00 00 00 00 00 00 
Done.
Ram2
Reading SPD data...
Z:07
Z:0d
Z:0a
Z:01
Z:00
Z:40
Z:75
Z:00
Z:82
Z:08
Z:01
Z:0e
Z:04
Z:0c
Z:a0
Z:00
Z:00
Z:50
Z:50
Z:2d
Z:40
Z:90
Z:00
Z:00
done
Ram3
Ram Enable 1
Ram Enable 2
dump northbridge: 
00: 86 80 60 25 06 00 90 00 03 00 00 06 00 00 00 00 
10: 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
20: 00 00 00 00 00 00 00 00 00 00 00 00 49 18 60 25 
30: 00 00 00 00 e4 00 00 00 00 00 00 00 00 00 00 00 
40: 00 00 00 00 00 00 00 00 00 00 00 00 1b 08 10 00 
50: 00 00 00 00 00 00 00 00 1b 16 00 00 37 2c 37 2c 
60: 20 40 60 80 00 00 00 00 00 00 00 00 00 00 00 00 
70: 00 00 00 00 00 00 00 00 05 82 41 2b 01 c1 00 20 
80: 00 00 20 00 ad 00 00 00 06 00 00 00 00 00 00 00 
90: 30 33 33 03 00 00 11 00 45 04 00 00 00 0a 38 00 
a0: 02 00 20 00 17 02 00 1f 00 00 00 00 00 00 00 00 
b0: 00 00 00 00 00 00 00 00 00 00 00 00 10 10 00 00 
c0: 44 40 30 11 00 00 0c 0e 00 00 00 00 00 00 00 00 
d0: 02 28 04 0e 0b 0d 00 10 00 00 11 b3 00 00 00 00 
e0: 00 00 00 00 09 00 05 11 21 00 00 00 00 00 00 00 
f0: 00 00 00 00 74 f8 00 00 40 0f 00 00 00 00 00 00 
Done.
Ram Enable 3
P:10    
Z:11   //0x7c value
R:00000000  //=%ecx
S:00        //check point 
[movl (%ecx), %eax  // hlt]




		
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