Pci Address Assignments; Pci Bus A Address Assignments; Pci Bus B Address Assignments - Sun Microsystems Sun Blade 100 Service Manual

C.7.2

PCI Address Assignments

The following table lists the PCI address assignments.
TABLE C-9
Address Range in PCI Address
0x8000.0000 - 0xBFFF.FFFF
0x4000.0000 - 0x7FFF.FFFF
0x40.0000 - 0x7f.ffff
0x0000.0000 - 0x3FFF.FFFF
0xC000.0000 - 0xFFFF.FFFF
0x00.0000 - 0x3f.FFFF
0xC0.0000 - 0xFF.FFF
C.7.2.1

PCI Bus A Address Assignments

PCI bus A has all the PCI slots and the address is programmable by the OpenBoot
PROM.
C.7.2.2

PCI Bus B Address Assignments

The PCI bus B address assignments are as follows:
PCIO ASIC registers
Boot PROM
PCIO ASIC Registers
The PCIO ASIC is a PCI client and the address can be reprogrammed by software
during boot only. Therefore, instead of providing absolute addresses for each of the
registers, only offset addresses, relative to a base address, are given.
The PCIO ASIC is a multifunction PCI device and its configuration space has three
base address pointers:
Boot PROM
EBus2 (function 0)
Ethernet (function 1)
PCI Address Assignments
Size
1 Gbyte
1 Gbyte
4 Mbytes
2 Gbytes
8 Mbytes
PCI Space Addressed
Primary PCI DVMA space
PCI bus A memory space
PCI bus A I/O space
PCI bus B memory space
PCI bus B I/O space
Appendix C Functional Description
Notes
CPU DVMA register
(equals 0x30)
PCI slots APB ASIC
register (equals 0xc)
PCI slots
On-board PCI bus
APB ASIC B register
(equals 0xc3)
C-19