2011/4/22 Gilles Chanteperdrix <[email protected]> > Aurele Traynard wrote: > > ok i'm sorry i wasn't clear at all... > > my problem is : when i call readl in a rt_task, the task is stopped... > > (maybe because the rt_task is launched in a module?) > > "Xenomai: suspending kernel thread bf0041c8 ('test_rt') at 0xbf003824 > after > > exception #0" > > if i remove the readl there is no problem > > > > With a normal Linux, in a module there isn't any problem > > On what platform? I can think of two things: > - the platform you use maps the ioremaped memory on-demand (x86 and ARM > at least do not allow this, but I do not know about other platforms) > - you are making an unaligned access, it works with Linux because it has > a handler for handling unaligned accesses, whereas Xenomai default > handler is to simply suspend a task doing this kind of things. > > Please do not forget to CC the mailing list. > > -- > Gilles. > I'm working with PXA270 (ARMv5te), FPGA's registers physicaly are mapped as CPU's registers... so it is alligned (i read 0x040001C0 and i use a 32bits integer....) so if i understand it should work...
thanks
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