From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matias Garcia Date: Fri, 24 Jun 2011 13:31:26 -0400 Subject: [Buildroot] how to tune powerpc e500v2 cpus in BR In-Reply-To: References: Message-ID: <4E04C9EE.4050206@rossvideo.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hi Raymond, You can put those in the BR2_TARGET_OPTIMIZATIONS setting under the Toolchain page e.g. (-mcpu=8548 -mspe=yes -mabi=spe -mhard-float -mfloat-gprs=double) Target Optimizations I selected a generic powerpc target because I didn't need the -mtune when I was specifying -mcpu already. As far as I know, 8548 and 8540 work out to the same code. I switched to the external CodeSourcery build tools for two reasons: (1) it allowed us to compile our application with -O3 (which we need) while the standard GNU toolchain caused some errors, and (2) they're supported by the Freescale/Mentor/CodeSourcery relationship, and not all of the patches get applied to mainline (particularly for newer processors). I had to add an option to the external wrapper so that it would call the toolchain with '-te500v2' which is a shortcut for the optimizations you list below. In that case, you can build your own applications without calling any options explicitly. Cheers, Matias On 11-06-24 10:27 AM, raymond zhao wrote: > Hi, > I am using freescale's p1020 CPU. It is a e500v2 core. How could I > config the build root to tune the tool chain for the following > options: > > -mcpu=8548 -mspe=yes -mabi=spe -mhard-float -mfloat-gprs=double > > From the menuconfig, I can only select CPU as 8540. > > Thanks, > > Raymond > _______________________________________________ > buildroot mailing list > buildroot at busybox.net > http://lists.busybox.net/mailman/listinfo/buildroot