Hello Jan and Philippe, It works fine now with the patches you gave Philippe. And all is clear with the commit explanations. :)
Thanks a lot, Gilles 2010/4/16 Philippe Gerum <[email protected]> > On Fri, 2010-04-16 at 00:00 +0200, Gilles DOFFE wrote: > > Hello, > > > > I try to install a real-time Linux kernel on a Roboard based on a > > Vortex86DX (a x486 with TSC). > > > > All works fine with : > > Linux Kernel 2.6.30.10 > > Xenomai 2.5.1 > > Adeos patch adeos-ipipe-2.6.30.8-x86-2.4-09.patch > > > > But, for all kernels upper or equal to 2.6.31, I always get a double > > fault when testing WP bit. I have this double fault just after that : > > > > Checking if this processor honours the WP bit even in supervisor > > mode... > > > > I traced with some simple printk that the problem occurs in this > > function, at the end or after the call of fix_to_virt : > > > > static noinline int do_test_wp_bit(void) > > { > > char tmp_reg; > > int flag; > > > > __asm__ __volatile__( > > " movb %0, %1 \n" > > "1: movb %1, %0 \n" > > " xorl %2, %2 \n" > > "2: \n" > > _ASM_EXTABLE(1b,2b) > > :"=m" (*(char *)fix_to_virt(FIX_WP_TEST)), > > "=q" (tmp_reg), > > "=r" (flag) > > :"2" (1) > > :"memory"); > > > > return flag; > > } > > > > I'm (quasi) sure that the problem is not that function, due to it > > works when the kernel is not patched. > > But where should I search ? > > Try backporting these two 2.6.32 patches to your kernel; this should be > straightforward: > > http://git.denx.de/?p=ipipe-2.6.git;a=commit;h=576f57f82dfd6c3ac285b0af76e5e0ce617679ba > > http://git.denx.de/?p=ipipe-2.6.git;a=commit;h=a250e984a76fd327a0d8cfada5290b27e99f1e4d > > > > > > Can you give me some indications ? > > > > Thanks, > > Gilles > > _______________________________________________ > > Adeos-main mailing list > > [email protected] > > https://mail.gna.org/listinfo/adeos-main > > > -- > Philippe. > > >
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