Pci Bus Arbiter Request Port Register (Pbareqport) 0Xd100 - Toshiba TMPR4925 Manual

10.4.22 PCI Bus Arbiter Request Port Register (PBAREQPORT) 0xD100

This register sets the correlation between each PCI Bus request source (PCI Controller and
REQ[3:0]) and each Internal PCI Bus Arbiter Request port (Master A - D, W - Z) (see Figure 10.3.9).
When changing these settings, each of the eight field values must always be set to different values.
After changing this register, the Broken Master Register (BM) value becomes invalid since the bit
mapping changes.
This register is only valid when using the on-chip PCI Bus Arbiter.
31 30 28
ReqAP
Reserved
R/W
111
15 14 12
ReqWP
Reserved
R/W
011
Bits Mnemonic Field Name
⎯
31 Reserved
30:28 ReqAP Request A Port
⎯
27 Reserved
26:24 ReqBP Request B Port
⎯
23 Reserved
22:20 ReqCP Request C Port
⎯
19 Reserved
Figure 10.4.22 PCI Bus Arbiter Request Port Register (1/2)
27 26 24
ReqBP
Reserved
R/W
110
11 10 8
ReqXP
Reserved
R/W
010
Request A Port (Initial value: 111, R/W)
Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter Request A Port
(Master A).
111: Makes the PCI Controller Master A.
110: Reserved
101: Reserved
100: Reserved
011: Makes REQ*[3] Master A.
010: Makes REQ*[2] Master A.
001: Makes REQ*[1] Master A.
000: Makes REQ*[0] Master A.
Request B Port (Initial value: 110, R/W)
Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter Request B Port
(Master B).
111: Makes the PCI Controller Master B.
110: Reserved
101: Reserved
100: Reserved
011: Makes REQ*[3] Master B.
010: Makes REQ*[2] Master B.
001: Makes REQ*[1] Master B.
000: Makes REQ*[0] Master B.
Request C Port (Initial value: 101, R/W)
Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter Request C Port
(Master C).
111: Makes the PCI Controller Master C.
110: Reserved
101: Reserved
100: Reserved
011: Makes REQ*[3] Master C.
010: Makes REQ*[2] Master C.
001: Makes REQ*[1] Master C.
000: Makes REQ*[0] Master C.
10-49
Chapter 10 PCI Controller
23 22 20
ReqCP
Reserved
R/W
101
7 6 4
ReqYP
Reserved
R/W
001
Description
⎯
⎯
⎯
⎯
19 18 16
ReqDP
Reserved
R/W : Type
100 : Initial value
3 2 0
ReqZP
Reserved
R/W : Type
000 : Initial value