* [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1
@ 2003-02-13 8:17 Robert Schwebel
2003-02-13 9:20 ` Geir Thomassen
` (2 more replies)
0 siblings, 3 replies; 8+ messages in thread
From: Robert Schwebel @ 2003-02-13 8:17 UTC (permalink / raw)
To: u-boot
Hi,
on http://www.pengutronix.de/software/u-boot_en.html you'll find our
latest u-boot patch, mostly for PXA250 and Cogent CSB226. It was made
against current CVS, so be quick if you want to apply it ;-)
Most of the patch was already sent to Wolfgang in a more documented way,
so this is mostly meant as something for people who actively develop for
the PXA plattform.
Comments are welcome...
Robert
--
Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de
Pengutronix - Linux Solutions for Science and Industry
Braunschweiger Str. 79, 31134 Hildesheim, Germany
Handelsregister: Amtsgericht Hildesheim, HRA 2686
Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4
^ permalink raw reply [flat|nested] 8+ messages in thread* [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 2003-02-13 8:17 [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 Robert Schwebel @ 2003-02-13 9:20 ` Geir Thomassen 2003-02-13 9:48 ` Robert Schwebel 2003-02-13 12:23 ` Wolfgang Denk 2003-02-13 9:28 ` Geir Thomassen 2003-02-13 20:42 ` Geir Thomassen 2 siblings, 2 replies; 8+ messages in thread From: Geir Thomassen @ 2003-02-13 9:20 UTC (permalink / raw) To: u-boot Any chance of getting this into CVS ? ^ permalink raw reply [flat|nested] 8+ messages in thread
* [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 2003-02-13 9:20 ` Geir Thomassen @ 2003-02-13 9:48 ` Robert Schwebel 2003-02-13 12:23 ` Wolfgang Denk 1 sibling, 0 replies; 8+ messages in thread From: Robert Schwebel @ 2003-02-13 9:48 UTC (permalink / raw) To: u-boot On Thu, Feb 13, 2003 at 10:20:42AM +0100, Geir Thomassen wrote: > Any chance of getting this into CVS ? You should be a little bit patient, Wolfgang has just moved office. Robert -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Braunschweiger Str. 79, 31134 Hildesheim, Germany Handelsregister: Amtsgericht Hildesheim, HRA 2686 Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 2003-02-13 9:20 ` Geir Thomassen 2003-02-13 9:48 ` Robert Schwebel @ 2003-02-13 12:23 ` Wolfgang Denk 1 sibling, 0 replies; 8+ messages in thread From: Wolfgang Denk @ 2003-02-13 12:23 UTC (permalink / raw) To: u-boot In message <3E4B636A.9030202@in.fer.no> you wrote: > Any chance of getting this into CVS ? Yes, of course: it's in my queue, but it seems I won't find time for it for another week (until after the Embedded World). Best regards, Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de See us @ Embedded World, Nuremberg, Feb 18-20, Hall 12.0 Booth 12-442 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 2003-02-13 8:17 [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 Robert Schwebel 2003-02-13 9:20 ` Geir Thomassen @ 2003-02-13 9:28 ` Geir Thomassen 2003-02-13 9:53 ` Robert Schwebel 2003-02-13 20:42 ` Geir Thomassen 2 siblings, 1 reply; 8+ messages in thread From: Geir Thomassen @ 2003-02-13 9:28 UTC (permalink / raw) To: u-boot From your patch (memsetup.S, various versions ..) /* Step 4f: Trigger a number (usually 8) refresh cycles by */ /* attempting non-burst read or write accesses to disabled */ /* SDRAM, as commonly specified in the power up sequence */ /* documented in SDRAM data sheets. The address(es) used */ /* for this purpose must not be cacheable. */ ldr r3, =CFG_DRAM_BASE str r2, [r3] str r2, [r3] str r2, [r3] str r2, [r3] str r2, [r3] str r2, [r3] str r2, [r3] str r2, [r3] There should 9 writes, since the first write doesn't trigger a refresh cycle on PXA250. See Intel? PXA250 and PXA210 Processors Specification Update, Jan 2003, Errata #116, page 30. .rept 9 str r2, [r2] .endr -- Geir ^ permalink raw reply [flat|nested] 8+ messages in thread
* [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 2003-02-13 9:28 ` Geir Thomassen @ 2003-02-13 9:53 ` Robert Schwebel 0 siblings, 0 replies; 8+ messages in thread From: Robert Schwebel @ 2003-02-13 9:53 UTC (permalink / raw) To: u-boot On Thu, Feb 13, 2003 at 10:28:23AM +0100, Geir Thomassen wrote: > There should 9 writes, since the first write doesn't trigger a refresh > cycle on PXA250. See Intel? PXA250 and PXA210 Processors Specification > Update, Jan 2003, Errata #116, page 30. Thanks, will be in the next patch. Robert -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Braunschweiger Str. 79, 31134 Hildesheim, Germany Handelsregister: Amtsgericht Hildesheim, HRA 2686 Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 2003-02-13 8:17 [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 Robert Schwebel 2003-02-13 9:20 ` Geir Thomassen 2003-02-13 9:28 ` Geir Thomassen @ 2003-02-13 20:42 ` Geir Thomassen 2003-02-13 21:28 ` Robert Schwebel 2 siblings, 1 reply; 8+ messages in thread From: Geir Thomassen @ 2003-02-13 20:42 UTC (permalink / raw) To: u-boot Robert Schwebel wrote: > > Comments are welcome... > in cpu/xscale/start.S you do: /* test if we run from flash or RAM - RAM/BDI: don't set cpuspeed */ /* FIXME: is the criterium used here only valid for PXA25X? */ mov r0, pc and r0, r0, #0xF0000000 /* RAM is at 0xa0000000-0xafffffff */ subs r0, r0, #0xa0000000 beq setspeed_done mov r0, #2 mcr p14, 0, r0, c6, c0, 0 setspeed_done: Why? I can trace trough the CPU speed setting code without any trouble with a BDI, and I don't understand why there should be any problems doing so. Disabeling the CPU speed setting code without skipping the SDRAM init code at the same time might actually get you into other problems since the refresh periode of the SDRAM might be too long. Jumping over the SDRAM init is a very good idea, since the code is running from the SDRAM that the code is initializing. One important step of the init sequence is to disable the SDRAM. -- Geir ^ permalink raw reply [flat|nested] 8+ messages in thread
* [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 2003-02-13 20:42 ` Geir Thomassen @ 2003-02-13 21:28 ` Robert Schwebel 0 siblings, 0 replies; 8+ messages in thread From: Robert Schwebel @ 2003-02-13 21:28 UTC (permalink / raw) To: u-boot On Thu, Feb 13, 2003 at 09:42:51PM +0100, Geir Thomassen wrote: > in cpu/xscale/start.S you do: > > /* test if we run from flash or RAM - RAM/BDI: don't set cpuspeed */ > /* FIXME: is the criterium used here only valid for PXA25X? */ > mov r0, pc > and r0, r0, #0xF0000000 /* RAM is at 0xa0000000-0xafffffff */ > subs r0, r0, #0xa0000000 > beq setspeed_done > > mov r0, #2 > mcr p14, 0, r0, c6, c0, 0 > setspeed_done: > > > Why? I can trace trough the CPU speed setting code without any trouble > with a BDI, and I don't understand why there should be any problems > doing so. Disabeling the CPU speed setting code without skipping the > SDRAM init code at the same time might actually get you into other > problems since the refresh periode of the SDRAM might be too long. > Jumping over the SDRAM init is a very good idea, since the code is > running from the SDRAM that the code is initializing. One important step > of the init sequence is to disable the SDRAM. The code in question was added last week and I removed it today from my local tree :-) The problem is that there is a bug in at least some hardware revisions of the PXA which in my case lets the debug handler disappear from the mini instruction cache once you access CP14 to switch the frequency. I've discussed this with the Abatron guys for some weeks now and they today have sent me a new firmware which works around the bug. It will be available officially in some days. However, as I'm now able to run the code in the debugger again the above code can be forgotten - I will not send it to Wolfgang officially. Robert -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Braunschweiger Str. 79, 31134 Hildesheim, Germany Handelsregister: Amtsgericht Hildesheim, HRA 2686 Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4 ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2003-02-13 21:28 UTC | newest] Thread overview: 8+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2003-02-13 8:17 [U-Boot-Users] [ANNOUNCE] u-boot-ptx-20030213-1 Robert Schwebel 2003-02-13 9:20 ` Geir Thomassen 2003-02-13 9:48 ` Robert Schwebel 2003-02-13 12:23 ` Wolfgang Denk 2003-02-13 9:28 ` Geir Thomassen 2003-02-13 9:53 ` Robert Schwebel 2003-02-13 20:42 ` Geir Thomassen 2003-02-13 21:28 ` Robert Schwebel
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