Memory and register adresses on PCI graphic chip.

Hi,

I have custom board based on Ocotea - PPC440GX with Graphic chip (Radeon M6) on it. I need to initialise the registers and the memory of the chip upon booting. Now I comunicate with the board thru serial interface, and u-boot 1.1.2 + linux 2.6.12 both working wery well up to the video.
The PCI memory is mapped on 0x80000000 in u-boot configuration. How can I understand where are the memory and register base adresses of the graphic chip?

This is part from u-boot splash screen:

Board: HIMA 440GX Board
       VCO: 1000 MHz
       CPU: 500 MHz
       PLB: 166 MHz
       OPB: 83 MHz
       EPB: 83 MHz
I2C:   ready
DRAM:  512 MB
FLASH: portwidth=4 chipwidth=2
found 1 erase regions
64 MB
*** Warning - bad CRC, using default environment

PCI:   Bus Dev VenId DevId Class Int
       00  01  1131  1561  0c03  00
       00  01  1131  1561  0c03  00
       00  01  1131  1562  0c03  00
       00  02  1002  4c59  0300  ff                   < --------------  The Radeon M6 chip
       00  03  1013  6005  0401  00
       00  04  1095  3114  0180  00
In:    serial
Out:   serial
Err:   serial
Net:   pfc1: 4
Konfiguration 4
---------------------------------------------
This information i can obtain from the /proc after linux loading: :

#lspci -vv
............................
00:02.0 Class 0300: 1002:4c59
       Subsystem: 1002:4c59
       Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B-
       Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
       Latency: 128 (2000ns min), cache line size 08
       Interrupt: pin A routed to IRQ 25
       Region 0: Memory at f0000000 (32-bit, prefetchable) [size=128M]
       Region 1: I/O ports at ff00 [size=256]
       Region 2: Memory at efff0000 (32-bit, non-prefetchable) [size=64K]
       Expansion ROM at <unassigned> [disabled] [size=128K]
       Capabilities: [50] Power Management version 2
               Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
               Status: D0 PME-Enable- DSel=0 DScale=0 PME-


Thanks a lot!
Zhivko