**** BEGIN LOGGING AT Thu Aug 04 23:59:56 2005
Aug 05 07:13:02 <prpplague> morning folks
Aug 05 07:13:08 <prpplague> anyone alive today?
Aug 05 07:24:33 <prpplague> hehe dead dead dead
Aug 05 07:36:31 * Jacmet is
Aug 05 07:36:59 * DaKa2 is
Aug 05 07:42:20 <prpplague> hehe
Aug 05 07:42:44 <prpplague> either of you done any code from linux to monitor the core logic registers from jtag?
Aug 05 07:43:45 * DaKa2 doesn't even have jtag yet
Aug 05 07:44:06 <Jacmet> nope
Aug 05 07:47:18 <prpplague> i see
Aug 05 08:15:26 <ep1220> prpplague: I can access the XScale JTAG registers from Linux using the FTDI chip
Aug 05 08:32:57 <prpplague> ep1220: cool
Aug 05 08:33:07 <prpplague> ep1220: using a custom app of course
Aug 05 08:33:19 <prpplague> ep1220: are you able to set break points?
Aug 05 08:33:45 <ep1220> prpplague: I be back in 10 minutes
Aug 05 08:33:45 <prpplague> ep1220: i'd like to set a break point, and then dump registers when it reaches that point
Aug 05 08:33:49 <prpplague> ep1220: ok
Aug 05 08:49:12 <ep1220> prpplague: So far I only loaded code into the cache.
Aug 05 08:49:32 <ep1220> A breakpoint can not be set thru a JTAG register
Aug 05 08:49:51 <ep1220> You need a stub on the CPU which sets the breakpoint
Aug 05 08:50:26 <ep1220> handles the exception and then dumps registers to the JTAG trasnfer registers
Aug 05 08:57:52 <prpplague> ep1220: hmm, that doesn't sound correct, as i am able to do that now
Aug 05 08:58:24 <ep1220> Set a breakpoint using JTAG ?
Aug 05 08:58:29 <prpplague> ep1220: yea
Aug 05 08:58:41 <prpplague> ep1220: i'm using armtool
Aug 05 08:58:51 <ep1220> What JTAG IF ?
Aug 05 08:59:41 <ep1220> Your target is an XScale CPU ?
Aug 05 09:00:15 <prpplague> ep1220: no samsung s3c44B0X with a wiggler style 
Aug 05 09:00:28 <ep1220> This is ARM7 or ARM 9 ?
Aug 05 09:04:35 <ep1220> I found it is ARM7TDMI
Aug 05 09:04:37 <ep1220>  XScale JTAG != ARM JTAG - debugging wise.
Aug 05 09:05:54 <ep1220> You know JMunakra's JTagPack ? Is on Source Forge. It supports ARM7TDMI
Aug 05 09:24:56 <prpplague> sorry boss on the phone
Aug 05 09:25:27 <prpplague> jtagpack? hmm, not heard of that one
Aug 05 09:25:45 <prpplague> ep1220: ahh, i've not done much with xscale
Aug 05 09:29:23 <prpplague> ep1220: interesting, i'll have a look
Aug 05 09:34:49 <prpplague> ep1220: the xscale jtag interface isn't standard arm?
Aug 05 09:52:22 <ep1220> prpplague: For debugging Intel has its own way
Aug 05 09:52:48 <ep1220> e.g Xscale has a mini-cache were You can load the debugging stub
Aug 05 09:53:09 <prpplague> ahh
Aug 05 09:53:18 <ep1220> ARM7 only allows You to insert an instruction into the execution register
Aug 05 09:53:47 <ep1220> MIPS has still another way, as do have most DSPs
Aug 05 09:54:18 <ep1220> There is no standard JTAG debugging IF
Aug 05 09:54:51 <ep1220> ARM9 also has some differences
Aug 05 09:54:58 <ep1220> Do You have the ARM debugging docs ?
Aug 05 09:58:43 <prpplague> no, i do not
Aug 05 09:58:52 <prpplague> url?
Aug 05 09:59:27 <ep1220> I found info on JTAG debuggin in the following ARM DOCs:
Aug 05 09:59:37 <ep1220> DDI0210C_7tdmi_r4p1_trm.pdf
Aug 05 09:59:44 <ep1220> DDI0210B_7TDMI_R4.pdf
Aug 05 09:59:52 <ep1220> DDI0029G_7TDMI_R3_trm.pdf
Aug 05 10:00:01 <ep1220> I downloaded them from the ARM website
Aug 05 10:00:21 <ep1220> Sorry, have no "direct click" URL.
Aug 05 10:00:24 <prpplague> ahh lovely, i'll have a look
Aug 05 10:00:31 * prpplague isn't totally helpless
Aug 05 10:00:37 <prpplague> hehe
Aug 05 10:00:42 <prpplague> ep1220: can get them from arm
Aug 05 10:00:47 <prpplague> ep1220: just didn't know they existed
Aug 05 10:01:04 <ep1220> bascially all 3 are jsut different versions of the same doc.
Aug 05 10:03:40 <ep1220> If You have more questions I'll be around in 2 hours. 
Aug 05 10:03:41 <ep1220> (not that I would call me  _the_ ARM JTAG debugging expert)
Aug 05 10:05:20 <ep1220> but would be interested what You are missing from  armtools
Aug 05 10:13:03 <prpplague> ep1220: ok thanks
Aug 05 12:06:28 <ep1220> prpplague: I am back
**** ENDING LOGGING AT Fri Aug 05 23:59:56 2005