February 2001 - ixp1200 - lists.cs.princeton.edu

RE: ixp1200 on linux
by Naik, Uday 26 Feb '01

26 Feb '01

When we first ported Linux to the IXP1200, we booted it directly from flash without cygmon. This was fairly restrictive specially since we were making changes all the time to the kernel. Also it limits what you can have on your ramdisk. So we got away from it. But it is possible if that's what you want. You will need to do some work to get there. Uday. -----Original Message----- From: Sprajc, Barry [mailto:barry.sprajc@intel.com] Sent: Monday, February 26, 2001 10:19 AM To: 'Sundar Ramachandran'; IXP1200(a)CS.Princeton.EDU Subject: RE: ixp1200 on linux To the best of my current knowledge, only TFTP is supported by Cygmon as installed in your flash - it probably could support PPP or SLIP, but I don't know for sure, as Cygmon would have to be rebuilt to support a different protocols. One way you could use TFFP is to put a linux box with a TFTP server on your local subnet, as I think TFTP is for local subnets anyways. I don't think it would be accessable by anyone on the other side of your gateway If your school policy is not not run TFTP on the network at all, you could add a second network card to the box with the TFTP server and assign it a private network address like 10.x.x.x or 192.168.x.x, one which isn't used on campus network - and connect them with a cross over cable -- this is what I have done here at work, so I don't have to bother the network admins for a static IP address for the Eval card /barry -----Original Message----- From: Sundar Ramachandran [mailto:ramachan@cse.uta.edu] Sent: Saturday, February 24, 2001 4:34 PM To: IXP1200(a)CS.Princeton.EDU Subject: ixp1200 on linux Hi, I have the ixp toolchain along with the linux kernel image loaded onto the ixp1200 evaluation processor. The one question I had was ,can we use anything other than tftpd to load this onto the eval kit? Does it compulsorily have to be tftpd, since I'm using minicom instead of NT hyperterminal to do this? The problem is that we have some restrictions on campus to use tftp services, so I need alternatives. I'll be happy if someone could give me some specifics, would appreciate it. Thanks, Sundar. ============================================================================ ==== "The optimist proclaims we live in the best of all possible worlds; and the pessimist fears this is true. " - James Cabell Sundar Ramachandran PHONE:(817)8015233 Dept. of Computer Science & Engg., E-MAIL: ramachan(a)acm.org UTA, Arlington, TX 76019. ============================================================================ ====

1 0

RE: ixp1200 on linux
by Sprajc, Barry 26 Feb '01

26 Feb '01

To the best of my current knowledge, only TFTP is supported by Cygmon as installed in your flash - it probably could support PPP or SLIP, but I don't know for sure, as Cygmon would have to be rebuilt to support a different protocols. One way you could use TFFP is to put a linux box with a TFTP server on your local subnet, as I think TFTP is for local subnets anyways. I don't think it would be accessable by anyone on the other side of your gateway If your school policy is not not run TFTP on the network at all, you could add a second network card to the box with the TFTP server and assign it a private network address like 10.x.x.x or 192.168.x.x, one which isn't used on campus network - and connect them with a cross over cable -- this is what I have done here at work, so I don't have to bother the network admins for a static IP address for the Eval card /barry -----Original Message----- From: Sundar Ramachandran [mailto:ramachan@cse.uta.edu] Sent: Saturday, February 24, 2001 4:34 PM To: IXP1200(a)CS.Princeton.EDU Subject: ixp1200 on linux Hi, I have the ixp toolchain along with the linux kernel image loaded onto the ixp1200 evaluation processor. The one question I had was ,can we use anything other than tftpd to load this onto the eval kit? Does it compulsorily have to be tftpd, since I'm using minicom instead of NT hyperterminal to do this? The problem is that we have some restrictions on campus to use tftp services, so I need alternatives. I'll be happy if someone could give me some specifics, would appreciate it. Thanks, Sundar. ============================================================================ ==== "The optimist proclaims we live in the best of all possible worlds; and the pessimist fears this is true. " - James Cabell Sundar Ramachandran PHONE:(817)8015233 Dept. of Computer Science & Engg., E-MAIL: ramachan(a)acm.org UTA, Arlington, TX 76019. ============================================================================ ====

1 0

ixp1200 on linux
by Sundar Ramachandran 24 Feb '01

24 Feb '01

Hi, I have the ixp toolchain along with the linux kernel image loaded onto the ixp1200 evaluation processor. The one question I had was ,can we use anything other than tftpd to load this onto the eval kit? Does it compulsorily have to be tftpd, since I'm using minicom instead of NT hyperterminal to do this? The problem is that we have some restrictions on campus to use tftp services, so I need alternatives. I'll be happy if someone could give me some specifics, would appreciate it. Thanks, Sundar. ================================================================================ "The optimist proclaims we live in the best of all possible worlds; and the pessimist fears this is true. " - James Cabell Sundar Ramachandran PHONE:(817)8015233 Dept. of Computer Science & Engg., E-MAIL: ramachan(a)acm.org UTA, Arlington, TX 76019. ================================================================================

1 0

What is IMP bit of Section Descriptor for IXP1200?
by Scott C. Karlin 22 Feb '01

22 Feb '01

In Section 7.6.5 of the ARM Architecture Reference Manual (the ARM ARM), bit 4 of the First-level section descriptor is described as "implementation defined." Does anyone know what this means for the IXP1200 and the IXP1200 evaluation board firmware? The IXP1200 evaluation board firmware sets the IMP bit to 1 for all mappings. Thanks, Scott

1 0

Re: Hard Reset of IXP1200 over PCI?
by Scott C. Karlin 20 Feb '01

20 Feb '01

Josh, Yes, I am now running the ixp board in a regular PC host. (A Pentium III running Linux.) Since I'm still actively working on the code, I'm not ready to release it just yet. There are still important things to get working before it's ready. For example, I haven't enabled the MMU and caches on the StrongARM yet so I imagine that I'm taking a big performance hit. I used the documentation/PCI_debug.txt from the CD-ROM as a guide and followed steps 1 and 2 to set the jumpers on the board so that it wouldn't attempt to act like a motherboard. (This is important as there is a potential to damage either the ixp board or the motherboard.) For the on-board firmware, I am using a device programmer to burn my own code into the flash EEPROMs. As for when I'd be ready to release the code, I'm not sure. I'm working toward an end-of-March deadline and I expect I'll be giving 3 talks in April. These will be slowing me down. Scott Forwarded message from Josh Fryman: > > Date: Tue, 20 Feb 2001 11:34:08 -0500 > From: Josh Fryman <fryman(a)cc.gatech.edu> > Organization: CoC, GaTech > X-Mailer: Mozilla 4.76 [en] (X11; U; SunOS 5.7 sun4u) > X-Accept-Language: en > To: "Scott C. Karlin" <scott(a)CS.Princeton.EDU> > Subject: Re: Hard Reset of IXP1200 over PCI? > > > Scott, > > Are you running your IXP board in a regular PCI > host (such as a PC), or is it still in an eval box? > Your email suggests you may have it running in a > real PCI host. > > If you have done this, can you share the procedure > you followed to get it working? > > Thanks, > > Josh

1 0

Re: Hard Reset of IXP1200 over PCI?
by Scott C. Karlin 20 Feb '01

20 Feb '01

I performed the experiment and answered my own question. It seems that writing 0xFFFFFFFF to the IXP1200_RESET register from the PCI bus does indeed reset the IXP1200. As expected, the reset knocks the IXP1200 off of the PCI bus. However, once I restored the PCI configuration registers to their original state, the board worked fine. Can anyone from Intel confirm (to the list) that the only reason a PCI device should not write to the IXP1200_RESET register is that the board will be deconfigured from the PCI bus? Scott > From: "Scott C. Karlin" <scott(a)CS.Princeton.EDU> > Subject: Hard Reset of IXP1200 over PCI? > To: ixp1200(a)CS.Princeton.EDU > Date: Wed, 14 Feb 2001 14:50:07 -0500 (EST) > > I'd like to be able to perform a hard reset of the > IXP1200 over the PCI bus. Most of the documentation > seems to indicate that I cannot do this. However, > the IXP1200 Programmer's Reference Manual seems to > indicate that it might be possible (but not allowed). > > Section 4.7.13 IXP1200_RESET indicates that the > IXP1200_RESET register can be read and written > from offset 0x7C. However, the paragraph directly > above says that "PCI devices must not write to this > register." > > What happens if I do? (I assume that the IXP1200 > will reset and clear the PCI registers including the > BAR set by the host machine. If I promise to put the > board back in the same place in the PCI memory map, > will everything be OK?) > > Scott

1 0

Hard Reset of IXP1200 over PCI?
by Scott C. Karlin 14 Feb '01

14 Feb '01

I'd like to be able to perform a hard reset of the IXP1200 over the PCI bus. Most of the documentation seems to indicate that I cannot do this. However, the IXP1200 Programmer's Reference Manual seems to indicate that it might be possible (but not allowed). Section 4.7.13 IXP1200_RESET indicates that the IXP1200_RESET register can be read and written from offset 0x7C. However, the paragraph directly above says that "PCI devices must not write to this register." What happens if I do? (I assume that the IXP1200 will reset and clear the PCI registers including the BAR set by the host machine. If I promise to put the board back in the same place in the PCI memory map, will everything be OK?) Scott

1 0

IXP1200 + wireless LAN
by Sundar Ramachandran 14 Feb '01

14 Feb '01

Hello, Does anybody know of any kind of development in Linux IXP1200 and wireless LANs? I'm trying to figure out how heterogeneous traffic between both wired and wireless subnets will affect the performance of the IXP1200,i.e. how well the processor will perform. By the way, I need a traffic generator to use in order to study the performance characteristics of the evaluation board. If you have any in mind, please let me know. Thanks. - Sundar. ================================================================================ "The optimist proclaims we live in the best of all possible worlds; and the pessimist fears this is true. " - James Cabell Sundar Ramachandran PHONE:(817)8015233 Dept. of Computer Science & Engg., E-MAIL: ramachan(a)acm.org UT Arlington, Arlington, TX 76019. ================================================================================

1 0

Flash Image and EXCEPT_ADDR
by Scott C. Karlin 12 Feb '01

12 Feb '01

I'm trying to understand how to build a flash image by looking at the files in BoardSupport/BootMgr and comparing with the actual flash contents (externally extracted using a device programmer). In the file romInit.s there are the following lines: L$_undef_vector: .long (EXCEPT_ADDR + 0x04) L$_swi_vector: .long (EXCEPT_ADDR + 0x08) L$_pabort_vector: .long (EXCEPT_ADDR + 0x0c) L$_dabort_vector: .long (EXCEPT_ADDR + 0x10) L$_irq_vector: .long (EXCEPT_ADDR + 0x18) L$_fiq_vector: .long (EXCEPT_ADDR + 0x1c) The file os.h defines EXCEPT_ADDR as 0x101FFFC0. I would expect this to generate the following sequence of long words: 101FFFC4 101FFFC8 101FFFCC 101FFFD0 101FFFD4 101FFFD8 101FFFDC Instead, the actual flash image is: 0000C004 0000C008 0000C00C 0000C010 0000C014 0000C018 0000C01C This suggests that EXCEPT_ADDR is 0x0000C000. Has EXCEPT_ADDR changed between the time we received our boards (BootMgr Version 1.0.1129) and when the CD-ROM was produced (BootMgr Version 1.0.1133) ? Scott

1 0

BldRom Functional Description?
by Scott C. Karlin 12 Feb '01

12 Feb '01

Does anyone have a functional description of the BldRom program? It's in the BoardSupport/Boot1200 subdirectory of the CD-ROM. I couldn't find a description of it in the documentation. Thanks, Scott

1 0