[ECOS] Problem on allocate PCI memory space...

["Ling Su" <lingsu@palmmicro.com>]

Dear Nick and Jifl,

Sorry for posting so many dump messages! Since we have some time difference,
I cannot catch your on net when I work, I have a lot of questions to ask
when I am digging this problem. Thanks for your patience!

I checked the schematic for the board, I doubt if the 4373 I/O memory
physical space can be changed. Therefore, if I still use 0x8000_0000 for the
my PCI card physical space, 4372 always response when I wrote into this
range. Probably set the PCI space to 0x9000_0000 will be the best choice, as
Nick suggested. Currently problem with this, it always trigger a
Segmentation Fault, I didn't really catch the reason. I guess it might
relate to the TLB(MMU) configuration. I append the recent session I run in
gdb, helpfully it can give you more information on this. The gdb debugger
complain 0xd000_0000 is out of bound when I try to take a look at its value,
how come?

Hope you can find anything out on the memory mapping and hopefully you can
answer my previous email questions. Thanks a lot!

Rgds,
-Ling
===============================================
(gdb) cont
Continuing.
Found device on bus 0, devfn 0x10:
 Device configuration succeeded
 **** Device IO and MEM access enabled
 Vendor    0x1688
 Device    0x8888
 Command   0x0000, Status 0x0280
 Class/Rev 0x07800001
 Header 0x11FF0F
 SubVendor 0x1111, Sub ID 0xFF1A
 BAR[0]    0x90000000 / probed size 0xFFF00000 / CPU addr 0xD0000000
 BAR[1]    0x00000000 / probed size 0x00000000 / CPU addr 0xFFFFFFFF
 BAR[2]    0x00000000 / probed size 0x00000000 / CPU addr 0xFFFFFFFF
 BAR[3]    0x00000000 / probed size 0x00000000 / CPU addr 0xFFFFFFFF
 BAR[4]    0x00000000 / probed size 0x00000000 / CPU addr 0xFFFFFFFF
 BAR[5]    0x00000000 / probed size 0x00000000 / CPU addr 0xFFFFFFFF
 Wired to HAL vector 13
Current pci base is D0000000
[New thread 3]
[Switching to thread 3]

Breakpoint 1, pci_test () at pcitest.c:293
293     (*(pci_base + 0x004)) = 0x0000;
Current language:  auto; currently c
(gdb) print pci_base
$1 = 0xd0000000 <Address 0xd0000000 out of bounds>                <---- ????
(gdb) cont
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x80100bb8 in pci_test () at pcitest.c:293
293     (*(pci_base + 0x004)) = 0x0000;

Dump of assembler code from 0x80100ba6 to 0x80100bff:
0x80100ba6 <pci_test+682>: daddiu $a0,$a0,-8908
0x80100baa <pci_test+686>: jal 0x8010522c <diag_printf>
0x80100bae <pci_test+690>: lw $a1,156($s8)
0x80100bb2 <pci_test+694>: lw $v0,156($s8)
0x80100bb6 <pci_test+698>: addiu $v0,$v0,4
0x80100bba <pci_test+702>: sb $zero,0($v0)
0x80100bbe <pci_test+706>: lui $a0,0x8011
0x80100bc2 <pci_test+710>: jal 0x8010522c <diag_printf>
0x80100bc6 <pci_test+714>: daddiu $a0,$a0,-8880
0x80100bca <pci_test+718>: lui $a0,0x8011
0x80100bce <pci_test+722>: jal 0x8010522c <diag_printf>
0x80100bd2 <pci_test+726>: daddiu $a0,$a0,-8852
0x80100bd6 <pci_test+730>: lw $v0,156($s8)
0x80100bda <pci_test+734>: addiu $v0,$v0,1024
0x80100bde <pci_test+738>: sw $v0,160($s8)
0x80100be2 <pci_test+742>: sw $zero,152($s8)
0x80100be6 <pci_test+746>: lw $v0,152($s8)
0x80100bea <pci_test+750>: slti $v0,$v0,10
0x80100bee <pci_test+754>: bnez $v0,0x80100bfc <pci_test+768>
0x80100bf2 <pci_test+758>: nop
0x80100bf6 <pci_test+762>: j 0x80100c40 <pci_test+836>
0x80100bfa <pci_test+766>: nop