> 1. for some reason, linux kernel sees the two eth interfaces but fails > to get the correct MAC addresses, thus when system fully boots up > "ifconfig" shows two eth0/eth1 with MAC addr as ff:ff:ff:ff:ff:ff, because > this is same as brd, many network services won't work. > I checked kernel source code and found that, in include/asm-ppc/ibm440.h, > there's a structure "board_info" holds MAC addresses of the two enet > interfaces. According to this header file: "Ebony firmware stores MAC > addresses in the F/W VPD area. The firmware must store the other dynamic > values in NVRAM like on the previous 40x systems so they should be > accessible if we really want them." > So, my question is: how can I get ibm440's EMAC info? from NVRAM? > the kernel I am using now does not support NVRAM for ppc yet.
Are you using kernel code supplied by MontaVista (MV)? I had the same problem; we are using MontaVista 3.0 for the Ebony board, and I had trouble with the interface from u-boot 0.2.0 to the MV kernel. The MV code is very specific to the bootrom supplied by IBM; that bootrom is "custom" to each unique Ebony board, because the 2 MAC addresses are stored at the end of the bootrom (that's the "VPD" area). I had to modify 3 MV files to get the MAC address passed in from u-boot to be used by the MV kernel (kernel/arch/ppc/platforms/ebony.c, kernel/include/asm-ppc/ibm440.h, and kernel/include/asm-ppc/ibm4xx.h). I have attached my patches for these files. After I got the MAC address to transfer over from u-boot, I had trouble with nfs mounting the root filesystem (I did not want to use bootp/dhcp in the nfs mounting process). I had to modify kernel/net/ipv4/ipconfig.c to get this to work (I've attached this patch as well). Hope this helps. Erik Teose erik.teose at tek.com -------------- next part -------------- A non-text attachment was scrubbed... Name: ebony.c.patch Type: application/octet-stream Size: 2727 bytes Desc: not available Url : http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20030409/042f38d8/attachment.obj -------------- next part -------------- A non-text attachment was scrubbed... Name: ibm440.h.patch Type: application/octet-stream Size: 2566 bytes Desc: not available Url : http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20030409/042f38d8/attachment-0001.obj -------------- next part -------------- A non-text attachment was scrubbed... Name: ibm4xx.h.patch Type: application/octet-stream Size: 262 bytes Desc: not available Url : http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20030409/042f38d8/attachment-0002.obj -------------- next part -------------- A non-text attachment was scrubbed... Name: ipconfig.c.patch Type: application/octet-stream Size: 410 bytes Desc: not available Url : http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20030409/042f38d8/attachment-0003.obj
