Scatter-Gather Map Translation - Samsung AlphaPC 164UX Technical Reference Manual

Figure 1–21 Scatter-Gather Map Translation
63 40 39
0000000000000000000
Window
Hit
Compare
Logic
W_DAC
33
0
Tn_BASE
Tn_BASE Select
Scatter-Gather
Table Address
Scatter-Gather Map in Memory
Base
63
000000000000000000
Offset
32 31 n n-1 20 19
31 n n-1 20
XXXXX
Wn_BASE
00000000 11111
Wn_MASK
n-10 n-11
000000000
33 n-10
21 20 01
32
Physical
Memory
Address
Scatter-Gather TLB
13 12
Offset
10
n-11 03 00
000
TAG
00 20
DAC Tag Addr<31:13>
V
13 12
Offset
System Address Space
02
ad_h<31:13>
sent to TLB
for PCI window
"hit."
DAC indicator
also sent.
Scatter-Gather TLB
Data
01 00
V
02
LJ-04277.AI4
A–43