* Re: Inquiring about your Linux 2.6.17.1 port to XUP [not found] <45300A50.2010000@vt.edu> @ 2006-10-14 17:35 ` Ameet Patil 2006-10-14 19:37 ` Gofast float point and 405ep Stelios Koroneos 2006-10-26 0:31 ` System ACE driver - for 2.6 kernel - need help to understand xsa_thread agnel juni 0 siblings, 2 replies; 4+ messages in thread From: Ameet Patil @ 2006-10-14 17:35 UTC (permalink / raw) To: Neil Steiner; +Cc: Dr. Neil Audsley, Ameet Patil, linuxppc-embedded Hi Neil, Please help yourself! Everything in http://www.cs.york.ac.uk/rtslab/demos/amos/xupv2pro/ is for public access! And yes! You are right... http://www.cs.york.ac.uk/rtslab/demos/amos/ is not for public. Do post your comments or bugs (if any) on the linux embedded ppc mailing list (linuxppc-embedded@ozlabs•org). cheers, -Ameet Neil Steiner wrote: > Dear Sirs: > > I came across a link to > http://www.cs.york.ac.uk/rtslab/demos/amos/xupv2pro/ on comp.arch.fpga, > but noticed that http://www.cs.york.ac.uk/rtslab/demos/amos/ requires > login access, and so I wasn't sure whether or not your Linux 2.6.17.1 > files where intended for public consumption. > > I don't have a pressing need for a 2.6 kernel, and have instead been > following directions from the University of Washington > (http://www.cs.washington.edu/research/lis/empart/xup_ppc_linux.shtml) > and Brigham Young University > (http://splish.ee.byu.edu/projects/LinuxFPGA/configuring.htm) for a 2.4 > kernel, but seeing the link to your site did pique my curiosity. > > My question then is simply whether I may refer to your files if they > prove to be useful, or if they were supposed to be restricted. > > Neil ^ permalink raw reply [flat|nested] 4+ messages in thread
* Gofast float point and 405ep 2006-10-14 17:35 ` Inquiring about your Linux 2.6.17.1 port to XUP Ameet Patil @ 2006-10-14 19:37 ` Stelios Koroneos 2006-10-26 0:31 ` System ACE driver - for 2.6 kernel - need help to understand xsa_thread agnel juni 1 sibling, 0 replies; 4+ messages in thread From: Stelios Koroneos @ 2006-10-14 19:37 UTC (permalink / raw) To: linuxppc-embedded Greetings ! Has anyone used the Gofast float point lib instead of the gcc one with the 405? If yes have you measured significant differences in performance ? I need to do considerable floating point operations (dtmf detection, echo cancelation etc) and i was wondering if there are any speed improvents Stelios ^ permalink raw reply [flat|nested] 4+ messages in thread
* System ACE driver - for 2.6 kernel - need help to understand xsa_thread 2006-10-14 17:35 ` Inquiring about your Linux 2.6.17.1 port to XUP Ameet Patil 2006-10-14 19:37 ` Gofast float point and 405ep Stelios Koroneos @ 2006-10-26 0:31 ` agnel juni 2006-10-26 8:00 ` Ameet Patil 1 sibling, 1 reply; 4+ messages in thread From: agnel juni @ 2006-10-26 0:31 UTC (permalink / raw) To: Ameet Patil; +Cc: linuxppc-embedded [-- Attachment #1: Type: text/plain, Size: 1363 bytes --] Hello all I am trying to understand the parameters that are sent through "cur_req" function used in funtion xsa_thread in System ACE driver. In xsa_thread function in the System ACE driver , In 2.4 kernel: -------------------- while ((stat = cur_req(&SysAce, sector, CURRENT->current_nr_sectors, CURRENT->buffer)) == XST_DEVICE_BUSY) xsa_short_delay(); Where as in 2.6 kernel this is changed to --------------------------------------------------------------- for(i = xsa_cur_req->current_nr_sectors; i > 0; i-=2){ xsa_device.req_done = 1; while ((stat = cur_req(&SysAce, sector, 2, buffer)) == XST_DEVICE_BUSY) xsa_short_delay(); #endif Ameet , could you help me understand the impact of the parameters, especailly the 3rd paramter which is hardcoded in 2.6 kernel.It would be great if you could clarify this in regard to 'mount' command. Thanks in advance Junita --------------------------------- Find out what India is talking about on - Yahoo! Answers India Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get it NOW [-- Attachment #2: Type: text/html, Size: 2932 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: System ACE driver - for 2.6 kernel - need help to understand xsa_thread 2006-10-26 0:31 ` System ACE driver - for 2.6 kernel - need help to understand xsa_thread agnel juni @ 2006-10-26 8:00 ` Ameet Patil 0 siblings, 0 replies; 4+ messages in thread From: Ameet Patil @ 2006-10-26 8:00 UTC (permalink / raw) To: agnel juni; +Cc: linuxppc-embedded Hi Junita, Its a hack really! When I was developing/porting the SysAce driver to 2.6 I tried to maintain the code as is from the 2.4 kernel driver. In doing so I found that there is a slight difference between the two kernels. i.e. I am not sure why, but the sysace device can only handle requests for 2 sectors at a time. This was fine in the 2.4 as the kernel always requested 2 sectors. However, in 2.6 I found that this is different: the requests are 8 secs. or more. I tried to fix this in vain by changing several parameters of the driver during initialization. Anyway, due to several issues I didn't try hard to fix it at that time. Hence this hack: No matter how many sec. req. I get from the kernel, I use a loop to req. only 2 secs. at a time. The xsa_device.req_done is used as a flag and reset in the XSA IRQ IIRC. If you find a better approach, please do update me. Hope this helps! cheers, -Ameet agnel juni wrote: > > Hello all > > I am trying to understand the parameters that are sent through "cur_req" > function used in funtion xsa_thread in System ACE driver. > > In xsa_thread function in the System ACE driver , > > In 2.4 kernel: > -------------------- > while ((stat = cur_req(&SysAce, sector, > CURRENT->current_nr_sectors, > CURRENT->buffer)) == XST_DEVICE_BUSY) > xsa_short_delay(); > > > Where as in 2.6 kernel this is changed to > --------------------------------------------------------------- > > for(i = xsa_cur_req->current_nr_sectors; i > 0; i-=2){ > xsa_device.req_done = 1; > while ((stat = cur_req(&SysAce, sector, > 2, > buffer)) == XST_DEVICE_BUSY) > xsa_short_delay(); > #endif > > Ameet , could you help me understand the impact of the parameters, > especailly the 3rd paramter which is hardcoded in 2.6 kernel.It would be > great if you could clarify this in regard to 'mount' command. > > Thanks in advance > Junita > > > > ------------------------------------------------------------------------ > Find out what India is talking about on - Yahoo! Answers India > <http://us.rd.yahoo.com/mail/in/yanswers/*http://in.answers.yahoo.com/> > Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. > Get it NOW > <http://us.rd.yahoo.com/mail/in/messengertagline/*http://in.messenger.yahoo.com> > ^ permalink raw reply [flat|nested] 4+ messages in thread
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2006-10-14 17:35 ` Inquiring about your Linux 2.6.17.1 port to XUP Ameet Patil
2006-10-14 19:37 ` Gofast float point and 405ep Stelios Koroneos
2006-10-26 0:31 ` System ACE driver - for 2.6 kernel - need help to understand xsa_thread agnel juni
2006-10-26 8:00 ` Ameet Patil
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