[LinuxBIOS] flash issue with AMD Ref board

beneo beneo at comcast.net
Thu May 12 19:46:02 CEST 2005


It's SST 49LF004. It the replacement for SST49LF040. They use same argorithm to flash. I looked the flash_and_burn utility. That's the case there too. 

beneo.

  ----- Original Message ----- 
  From: YhLu 
  To: beneo ; linuxbios at openbios.org 
  Sent: Thursday, May 12, 2005 9:53 AM
  Subject: RE: [LinuxBIOS] flash issue with AMD Ref board


  SST49LF004 or SST49LF040 ?

  YH



----------------------------------------------------------------------------
    From: beneo [mailto:beneo at comcast.net] 
    Sent: Wednesday, May 11, 2005 7:20 PM
    To: beneo; YhLu; linuxbios at openbios.org
    Subject: Re: [LinuxBIOS] flash issue with AMD Ref board


    YhLu,

    EEPOM should be SST 49LF004, sorry. 

    I also get the CPU version, it's a print out from cat /proc/cpuinfo. Total two CPU, I put the the second CPU here. 

    processor       : 1
    vendor_id       : AuthenticAMD
    cpu family      : 15
    model           : 5
    model name      : 02/05
    stepping        : 8
    cpu MHz         : 1395.089
    cache size      : 1024 KB
    physical id     : 0
    siblings        : 1
    fdiv_bug        : no
    hlt_bug         : no
    f00f_bug        : no
    coma_bug        : no
    fpu             : yes
    fpu_exception   : yes
    cpuid level     : 1
    wp              : yes
    flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall mmxext l
    m 3dnowext 3dnow
    bogomips        : 2785.28

    Thanks 

    Beneo

      ----- Original Message ----- 
      From: beneo 
      To: YhLu ; linuxbios at openbios.org 
      Sent: Wednesday, May 11, 2005 7:14 PM
      Subject: Re: [LinuxBIOS] flash issue with AMD Ref board


      EEPROM is SST 48LF004.

      I install 2GB to CPU0 and 2GB to CPU1. I use 512MB DIMM, 4 DIMM per CPU, so total should be 4GB. But linux command cat /proc/meminfo report one 2 GB when using LinuxBIOS.

      I have two opteron CPU, I'm not sure the version though.

      thanks

      beneo

        ----- Original Message ----- 
        From: YhLu 
        To: beneo ; linuxbios at openbios.org 
        Sent: Wednesday, May 11, 2005 7:27 PM
        Subject: RE: [LinuxBIOS] flash issue with AMD Ref board


        what is EEPROM in your BIOS socket?

        How do you install your DIMM? 4x1G in CPU0?

        What is your cpu version?

        YH



----------------------------------------------------------------------
          From: beneo [mailto:beneo at comcast.net] 
          Sent: Wednesday, May 11, 2005 6:57 PM
          To: linuxbios at openbios.org
          Subject: [LinuxBIOS] flash issue with AMD Ref board



          I'm playing with the AMD seranede board. The flash_and_burn utility can not program linuxBIOS to the flash. but I can read the linuxbios and save to a file correctly.

          If I boot from AMI BIOS, using same utility, I can program a linuxBIOS into the flash. That made me believe some setting by linuxBIOS on the AMD Ref board is not right. I just don't know what.

          I used gdb to trace the code, Flash_and_burn utility enables flash by program two AMD Southbridge 8111 registers, One for enable 4MB window to flash (DevB, 0x43), one for enable write to the flash (DevB, 0x40). I checked the AMD datasheet, it seems all it need. But if I boot with LinuxBIOS, the flash erase command has no effect. with AMI BIOS, I can sucessfully erase a sector. 

          could anybody give me some pointer on what to check? 

          I should add, the linuxBIOS only reports 2GB memory when I really have 4GB in the system. I don't know if this have something to do with my issue.

          Thanks 

          Beneo



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