Exceptions during PCI initialization at u-boot
Prabhat_Singh
Prabhat_Singh at Satyam.com
Tue Jun 20 22:18:48 EST 2006
Hi Dave,
Thanks for prompt response, it's really helped.
By reading ESR (error status register) I found that machine check
exception is coming because of "PCI parity error received on a write"
bit 7 of ESR is getting set.
Can you tell me reason and the possible solution for this one.
Regards
Prabhat
-----Original Message-----
From: Liu Dave-r63238 [mailto:DaveLiu at freescale.com]
Sent: Tuesday, June 20, 2006 3:40 PM
To: Prabhat_Singh; linuxppc-embedded at ozlabs.org
Subject: RE: Exceptions during PCI initialization at u-boot
Hi Prabhat,
Be careful the register endian, these registers are little endian.
I suggest you do clearing the bit before pci_hose_scan.
I suspect the traps code have one bug inside of u-boot-1.0.0.
-Dave
> -----Original Message-----
> From: Prabhat_Singh [mailto:Prabhat_Singh at Satyam.com]
> Sent: Tuesday, June 20, 2006 5:58 PM
> To: Liu Dave-r63238; linuxppc-embedded at ozlabs.org
> Subject: RE: Exceptions during PCI initialization at u-boot
>
>
> Hi Dave
> Thanks for you comments.
>
> I tried clearing 'PCI No response' as follows :
> Unsigned int* EMR=( Unsigned
> int*)0xf0010888;
> Unsigned int* ESR=( Unsigned
> int*)0xf0010884;
> Before pci_hose_read_config_byte function I cleared the
> the 'PCI No response' bit.
> *EMR &=0xFFFFFFF7;
> *ESR |=0x00000008;
> Now it's getting reset and machine check exception coming all the time
> continuously and board is not booting up.
>
> I am clueless please advice what to do?
>
> Regards
> Prabhat
>
>
>
>
>
>
> -----Original Message-----
> From: Liu Dave-r63238 [mailto:DaveLiu at freescale.com]
> Sent: Tuesday, June 20, 2006 1:29 PM
> To: Prabhat_Singh; linuxppc-embedded at ozlabs.org
> Subject: RE: Exceptions during PCI initialization at u-boot
>
> Hi Prabhat,
>
> Did you clear the 'PCI No response' in the error mask register
> before you do PCI configuration read? If you didn't, machine check
> will arise when PCI scan unpopulated PCI slot.
>
> I notice that the MSR[12] is set, but the trap codes haven't
> detect that, what is your toolchain?
>
> Regards,
> -Dave
>
>
> -----Original Message-----
> Hi all
> I am getting two exceptions, that you will find in log, at the
> pci_hose_read_config_byte memory is crashing that's I found in
> System.map. after second exception its boots properly. I have no clue
> whats happening. And why I am not able to read Configuration space of
> pci.
> From where this exception is coming?
> Please help me out. What else I can check?
>
>
> VPN Router Board
>
>
> Vpn Router U-Boot 1.0.0 (Jun 19 2006 - 11:31:37)
>
> MPC8260 Reset Status: External Soft, External Hard
>
> MPC8260 Clock Configuration
> - Bus-to-Core Mult 4x, VCO Div 2, 60x Bus Freq 25-75 , Core Freq
> 100-300
> - dfbrg 0, corecnf 0x1a, busdf 3, cpmdf 1, plldf 0, pllmf 3
> - vco_out 400000000, scc_clk 100000000, brg_clk 100000000
> - cpu_clk 400000000, cpm_clk 200000000, bus_clk 100000000
>
> CPU: 8272 (HiP7 Rev 14, Mask A.0 1K50M) at 400 MHz
> Board: VPN8248
> DRAM: 32 MB
> total length of code 216456l 34d88value of sdrambase+ramsize
> 02000000
> Top of RAM usable for U-Boot at: 02000000
> Reserving 211k for U-Boot at: 01fcb000
> Reserving 128k for malloc() at: 01faae00
> Reserving 76 Bytes for Board Info at: 01faadb4
> Reserving 80 Bytes for Global Data at: 01faad64
> Stack Pointer at: 01faad48
> New Stack Pointer is: 01faad48
> value of ret 0
> Entering reloacte
> Now running in RAM - U-Boot at: 01fcb000
> POST memory POST memory PASSED
> PASSED
> FLASH: satyam : manufacturor ID = 200020satyam: id1=22df22df
> satyam: id2=0
> satyam: id3=80008
> 16 MB
> PCI Autoconfig: Memory region: [14000000-1bffffff]
> PCI Autoconfig: I/O region: [1c000000-1dffffff]
> Bus Fault @ 0x01fd2df8, fixup 0x00000000
> Machine check in kernel mode.
> Caused by (from msr): regs 01faab60 Unknown values in msr
> NIP: 01FD2DF8 XER: 00000000 LR: 01FD2DF0 REGS: 01faab60 TRAP:
> 0200 DAR:
> 01FE4DB8
> MSR: 00083002 EE: 0 PR: 0 FP: 1 ME: 1 IR/DR: 00
>
> GPR00: 01FD3A24 01FAAC50 FFFFFFFF 00000000 8000080C 00000002 01FAAC5E
> 01C5D1FB
> GPR08: 01FD0084 F0010904 00000000 00000000 00000020 FFFFFFFF 01FF8000
> 020CB000
> GPR16: FFFFFFFF FFFFFFFF FFFFFEFF FFFFFFFF 00000000 00000000 FFFFFFFF
> F0010D20
> GPR24: 00000000 00000000 01FFE39C 00000100 01FFE39C 01FAAD64 01FF8400
> 00000800
> Call backtrace:
> 01FD3A24 01FD3BF0 01FE8B84 01FE3E04 01FD3C64 01FCFE30 01FCE48C
> machine check
> VPN Router Board
>
>
> Vpn Router U-Boot 1.0.0 (Jun 19 2006 - 11:31:37)
>
> MPC8260 Reset Status:
>
> MPC8260 Clock Configuration
> - Bus-to-Core Mult 4x, VCO Div 2, 60x Bus Freq 25-75 , Core Freq
> 100-300
> - dfbrg 0, corecnf 0x1a, busdf 3, cpmdf 1, plldf 0, pllmf 3
> - vco_out 400000000, scc_clk 100000000, brg_clk 100000000
> - cpu_clk 400000000, cpm_clk 200000000, bus_clk 100000000
>
> CPU: 8272 (HiP7 Rev 14, Mask A.0 1K50M) at 400 MHz
> Board: VPN8248
> DRAM: 32 MB
> total length of code 216456l 34d88value of sdrambase+ramsize
> 02000000
> Top of RAM usable for U-Boot at: 02000000
> Reserving 211k for U-Boot at: 01fcb000
> Reserving 128k for malloc() at: 01faae00
> Reserving 76 Bytes for Board Info at: 01faadb4
> Reserving 80 Bytes for Global Data at: 01faad64
> Stack Pointer at: 01faad48
> New Stack Pointer is: 01faad48
> Entering reloacte
> Now running in RAM - U-Boot at: 01fcb000
> FLASH: satyam : manufacturor ID = 200020satyam: id1=22df22df
> PCI Autoconfig: Memory region: [14000000-1bffffff]
> PCI Autoconfig: I/O region: [1c000000-1dffffff]
> vendor=168c
> PCI Scan: Found Bus 0, Device 15, Function 0
> PCI Autoconfig: BAR 0, Mem, size=0x10000, address=0x14000000
> PCI Autoconfig: BAR 1, I/O, size=0xffffb000, No room in resource
> PCI: 00 0f 168c 0013 0200 00
> value of item =1
> In: serial
> Out: serial
> Err: serial
> Chip Name = 175a
> Chip Name = 175c
> phy ID(0x02430d80) = 02430d80
> Level One/ICPLUS PHY Identied IC175C Revision 0
> Phy operating at 100 MBit/s in full-duplex mode
> Phy operating at 100 MBit/s in full-duplex mode
> U-Boot relocated to 01fcb000
> Net: value of fec FCC2 ETHERNET
> FCC2 ETHERNET
> Hit any key to stop autoboot: 5 satyam=>
>
>
>
>
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