Thanks for your answer. But it doesn't work. I think ioremap create a kernel panic. But I can't see because i have no UART ready. Is there a way in order to trace the failure ?
2008/8/7, Juergen Beisert <[EMAIL PROTECTED]>: > > Am Donnerstag, 7. August 2008 11:54 schrieb Sébastien Chrétien: > > > Hello, > > > > I am trying to port linux on my Powerpc Board. I have used Linux 2.6.26 > and > > gcc 3.4.5. > > I have used Uboot 1.2. > > Linux seems running from _start to udbg_early_init(). That's why I > > develloped a udbg_driver. > > It must write in a register which is located at 0x2001b044. So I wrote : > > > > void __iomem *p; > > p=ioremap(0x2001b044,4); > > iowrite32('O',p); > > iowrite32('K',p); > > > try > > p=ioremap(0x2001b000, 0x1000); > iowrite32('O',p + 0x44); > iowrite32('K',p + 0x44); > > instead. > > jbe > > -- > Dipl.-Ing. Juergen Beisert | http://www.pengutronix.de > Pengutronix - Linux Solutions for Science and Industry > Handelsregister: Amtsgericht Hildesheim, HRA 2686 > Hannoversche Str. 2, 31134 Hildesheim, Germany > Phone: +49-5121-206917-7 | Fax: +49-5121-206917-9 >
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