From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <502E6523.8050007@xenomai.org> Date: Fri, 17 Aug 2012 17:37:07 +0200 From: Philippe Gerum MIME-Version: 1.0 References: <502D040F.2010906@axesseurope.com> <20120816144617.GD1237@csclub.uwaterloo.ca> <502E541F.7090801@axesseurope.com> <502E5830.4080205@xenomai.org> <502E5D04.70002@xenomai.org> <502E5F2E.20405@xenomai.org> In-Reply-To: <502E5F2E.20405@xenomai.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] Trying to get Xenomai on P1010RDB List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: xenomai@xenomai.org On 08/17/2012 05:11 PM, Gilles Chanteperdrix wrote: > On 08/17/2012 05:02 PM, Philippe Gerum wrote: >> On 08/17/2012 04:41 PM, Gilles Chanteperdrix wrote: >>> On 08/17/2012 04:24 PM, Charles Retailleau wrote: >>>> Thanks Lennart that was very useful, it now works. >>>> Here is the little patch I made, yet I couldn't find a switch to force >>>> it for core e500/e500xx only... >>>> >>>> >>>> --- ./xenomai-2.6.1.orig/include/asm-powerpc/syscall.h 2011-11-09 >>>> 13:21:36.000000000 +0100 >>>> +++ ./xenomai-2.6.1.mine/./include/asm-powerpc/syscall.h 2012-08-17 >>>> 15:47:28.387435909 +0200 >>>> @@ -167,9 +167,9 @@ >>>> } u; >>>> unsigned long __tbu; >>>> >>>> - __asm__ __volatile__("1: mftbu %0\n" >>>> - "mftb %1\n" >>>> - "mftbu %2\n" >>>> + __asm__ __volatile__("1: mfspr %0,269\n" >>>> + "mfspr %1,268\n" >>>> + "mfspr %2,269\n" >>>> "cmpw %2,%0\n" >>>> "bne- 1b\n":"=r"(u.v[0]), >>>> "=r"(u.v[1]), "=r"(__tbu)); >>>> Thanks to all for your help >>>> Charles, >>> >>> If I understand correctly, this patch breaks old powerpcs. So, do we >>> have a compilation constant allowing to know whether we are compiling >>> for an old or new powerpc? >>> >> >> For the sake of completeness, we could condition mftb to CONFIG_POWER3, >> all others we care for (i.e. >= ISA 2.01) do support mfspr 268. >> > > is CONFIG_POWER3 available when configuring user-space support? > No, but actually, I never ported Xenomai to power3 and will likely never do this. It's the early 64bit server architecture; we won't officially support any 64bit platform which does not comply with ISA 2.04 at least anyway. Best effort would be to depend on a gcc define built-in for mcpu=power3 if any. -- Philippe.