Hi,<br><br>I have MPC8572DS Board with<br><br>> uname -a<br>Linux mpc8572ds 2.6.23 #3 SMP<br><br>and u-boot <a href="http://1.3.0.">1.3.0.</a><br><br>I have an ATI Radeon 3650 graphics card in the PCIe Slot1 as you can see in the following charts<br>
<br>> lspci -v<br>...<br>0001:03:00.0 Non-VGA unclassified device: Freescale Semiconductor Inc MPC8572E (rev 10)<br> !!! Invalid class 0000 for header type 01<br> Flags: bus master, fast devsel, latency 0<br>
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0<br> I/O behind bridge: 00000000-00000fff<br> Memory behind bridge: a0000000-bfffffff<br> Capabilities: [44] Power Management version 2<br>
Capabilities: [4c] Express Root Port (Slot-) IRQ 0<br> Capabilities: [100] Advanced Error Reporting<br><br>0001:04:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD 3600 Series (prog-if 00 [VGA controller])<br>
Subsystem: ATI Technologies Inc Unknown device 0b42<br> Flags: bus master, fast devsel, latency 0, IRQ 18<br> Memory at a0000000 (64-bit, prefetchable) [size=256M]<br> Memory at b0000000 (64-bit, non-prefetchable) [size=64K]<br>
I/O ports at 1000 [size=256]<br> Capabilities: [50] Power Management version 3<br> Capabilities: [58] Express Legacy Endpoint IRQ 0<br> Capabilities: [a0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-<br>
Capabilities: [100] Unknown (11)<br><br>The first problem is that the kernel does not seem to know that there is a kind of pci bridge.<br><br>Doing..<br><br>> dmesg<br>...<br>Found 0001:03:00.0 [1957/0040] 000b20 01<br>
PCI: Calling quirk c045aa60 for 0001:03:00.0<br>PCI: 0001:03:00.0: class b20 doesn't match header type 01. Ignoring class.<br>...<br>PCI: Fixups for bus 0001:03 <br>PCI: Scanning behind PCI bridge 0001:03:00.0, config 010100, pass 0 <br>
PCI: Scanning behind PCI bridge 0001:03:00.0, config 000000, pass 1 <br>...<br>PCI: Cannot allocate resource region 0 of device 0001:04:00.0<br> got res [a0000000:afffffff] bus [a0000000:afffffff] flags 120c for BAR 0 of 0001:04:00.0<br>
...<br>vga16fb: initializing<br>vga16fb: mapped to 0x000a0000<br>fb0: VGA16 VGA frame buffer device<br>...<br><br>The system cannot allocate de region 0, i believe that is an IO region.<br><br>Trying to read de framebuffer<br>
<br>> cat /dev/fb0<br><br>__ioremap(): phys addr 0xa0000 is RAM lr c018e838<br>Unable to handle kernel paging request for data at address 0x000a0000<br>Faulting instruction address: 0xc0191538<br>Oops: Kernel access of bad area, sig: 11 [#1]<br>
SMP NR_CPUS=2 MPC8572 DS<br>NIP: c0191538 LR: c01914d4 CTR: 00000400<br>REGS: e0415e10 TRAP: 0300 Not tainted (2.6.23)<br>MSR: 00029000 <EE,ME> CR: 40002242 XER: 00000000<br>DEAR: 000a0000, ESR: 00000000<br>TASK = efe64530[1085] 'cat' THREAD: e0414000 CPU: 1<br>
GPR00: 00000400 e0415ec0 efe64530 fffffff4 c07635dc 00000000 efffa530 00000000 <br>GPR08: 00000001 e0433000 00000000 000a0000 20002222 1001c648 0ffea000 10090000 <br>GPR16: 10010000 00000002 fffff000 00001000 00000000 00000000 100bbb28 100bec08 <br>
GPR24: 00000000 e0433000 00001000 000a0000 00001000 efd8d400 10016000 e0415f20 <br>NIP [c0191538] fb_read+0x148/0x260<br>LR [c01914d4] fb_read+0xe4/0x260<br>Call Trace:<br>[e0415ec0] [c01914d4] fb_read+0xe4/0x260 (unreliable)<br>
[e0415ef0] [c008bf24] vfs_read+0xc4/0x168<br>[e0415f10] [c008c50c] sys_read+0x4c/0x90<br>[e0415f40] [c000ffb8] ret_from_syscall+0x0/0x3c<br>Instruction dump:<br>7f7be214 3b000000 2b9a1000 39201000 7f9a4f1e 7f2bcb78 7f801671 7c0903a6 <br>
41820034 7f6bdb78 7f29cb78 39400000 <800b0000> 394a0001 396b0004 90090000 <br>Segmentation fault<br><br>> cat /proc/ioports<br><br>00000000-0000ffff : /pcie@ffe08000<br> 00000000-0000ffff : PCI Bus #01<br> 00000020-00000021 : 8259 (master)<br>
000000a0-000000a1 : 8259 (slave)<br> 000004d0-000004d1 : 8259 edge control<br> 00001000-00001fff : PCI Bus #02<br> 00001000-000010ff : 0000:02:1d.0<br> 00001200-00001207 : 0000:02:1f.0<br> 00001200-00001207 : libata<br>
00001208-0000120b : 0000:02:1f.0<br> 00001208-0000120b : libata<br> 00001210-00001217 : 0000:02:1f.0<br> 00001210-00001217 : libata<br> 00001218-0000121b : 0000:02:1f.0<br> 00001218-0000121b : libata<br>
00001220-0000122f : 0000:02:1f.0<br> 00001220-0000122f : libata<br> 00001230-00001237 : 0000:02:1f.1<br> 00001238-0000123b : 0000:02:1f.1<br> 00001240-00001247 : 0000:02:1f.1<br> 00001248-0000124b : 0000:02:1f.1<br>
00001250-0000125f : 0000:02:1f.1<br>fffdc000-fffebfff : /pcie@ffe0a000<br>fffee000-ffffdfff : /pcie@ffe09000<br> fffee000-ffffdfff : PCI Bus #04<br> fffef000-fffef0ff : 0001:04:00.0<br><br>I cant see anything, i have tried differents the lastest version of u-boot (u-boot-2008) and linux kernel (<a href="http://2.6.27.4">2.6.27.4</a>) but it dont solve this problem.<br>
<br>All comments will be good.<br><br>Thanks in advance and sorry for my english.<br><br>Isaac.<br>