IDT PCI Express 89HPES32NT24xG2, User Manual, Page: 256 / 744

IDT Non-Transparent Switch Operation
PES32NT24xG2 User Manual 14 - 8 January 30, 2013
Notes
The lookup table for both BARs is configured using the Lookup Table Offset (LUTOFFSET), Lookup
Table Lower Data (LUTLDATA), Lookup Table Middle Data (LUTMDATA), Lookup Table Upper Data (LUTU-
DATA) registers.
– Fields associated with lookup entries are modified by accessing the LUTLDATA, LUTLMDATA and
LUTUDATA registers. A read from one of these registers returns the field values of the lookup
table entry pointed to by the LUTOFFSET register. Similarly, a write updates the fields of the
lookup entry pointed to by the LUTOFFSET register.
– The BAR field in the LUTOFFSET register selects the lookup table associated with the corre-
sponding BAR while the INDEX field in the LUTOFFSET field selects the lookup table entry.
The state of the lookup table is preserved across all resets except a switch fundamental reset. Following
a switch fundamental reset, the state of all lookup table fields except the Valid (V) field is undefined.
Following a switch fundamental reset, the Valid field is cleared in all entries.
BARSETU
Px SIZE
Field
Aperture
Size
Page
Size
Base
Address
(bits)
1
1.
Assumes 64-bit TLP address. If only 32-bits are used then bits [31:x] are used.
Index
(bits)
Offset
(bits)
14 16 KB 512 B [63:14] [13:9] [8:0]
15 32 KB 1 KB [63:15] [14:10] [9:0]
16 64 KB 2 KB [63:16] [15:11] [10:0]
17 128 KB 4 KB [63:17] [16:12] [11:0]
18 256 KB 8 KB [63:18] [17:13] [12:0]
19 512 KB 16 KB [63:19] [18:14] [13:0]
20 1 MB 32 KB [63:20] [19:15] [14:0]
21 2 MB 64 KB [63:21] [20:16] [15:0]
22 4 MB 128 KB [63:22] [21:17] [16:0]
23 8 MB 256 KB [63:23] [22:18] [17:0]
24 16 MB 512 KB [63:24] [23:19] [18:0]
25 32 MB 1 MB [63:25] [24:20] [19:0]
26 64 MB 2 MB [63:26] [25:21] [20:0]
27 128 MB 4 MB [63:27] [26:22] [21:0]
28 256 MB 8 MB [63:28] [27:23] [22:0]
29 512 MB 16 MB [63:29] [28:24] [23:0]
30 1 GB 32 MB [63:30] [29:25] [24:0]
31 2 GB 64 MB [63:31] [30:26] [25:0]
32 4 GB 128 MB [63:32] [31:27] [26:0]
33 8 GB 256 MB [63:33] [32:28] [27:0]
34 16 GB 512 MB [63:34] [33:29] [28:0]
35 32 GB 1 GB [63:35] [34:30] [29:0]
36 64 GB 2 GB [63:36] [35:31] [30:0]
37 128 GB 4 GB [63:37] [36:32] [31:0]
Table 14.3 24-Entry Lookup Table Parameters