From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 1 May 2015 16:00:18 +0200 From: Gilles Chanteperdrix Message-ID: <20150501140018.GF1993@hermes.click-hack.org> References: <20150430183147.GZ1993@hermes.click-hack.org> <20150430201409.GA1993@hermes.click-hack.org> <20150430212151.GD24389@csclub.uwaterloo.ca> <20150430212749.GB1993@hermes.click-hack.org> <20150501134547.GF24389@csclub.uwaterloo.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150501134547.GF24389@csclub.uwaterloo.ca> Subject: Re: [Xenomai] Ipipe-core patched kernel fails to start when certain platform drivers are enabled List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Lennart Sorensen Cc: xenomai@xenomai.org On Fri, May 01, 2015 at 09:45:47AM -0400, Lennart Sorensen wrote: > On Thu, Apr 30, 2015 at 11:27:49PM +0200, Gilles Chanteperdrix wrote: > The exynos5420 has a 32bit timer at 24MHz. It wraps every 178 seconds. > Good thing we only use that as a build box. Xenomai extends counters to 64 bits in software. So, if that counter was used as a tsc by Xenomai, it would wrap in : (1 << 64) / 24000000 = 768614336404 s That is: 768614336404 / (365 * 24 * 3600) = 24372 years. -- Gilles.