From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Denk Date: Sat, 13 Nov 2010 00:10:33 +0100 Subject: [U-Boot] New to U-boot development, adding Octeon support In-Reply-To: <201011121345.22528.Aaron.Williams@caviumnetworks.com> References: <201011121345.22528.Aaron.Williams@caviumnetworks.com> Message-ID: <20101112231033.2ABACCEA55B@gemini.denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Aaron, In message <201011121345.22528.Aaron.Williams@caviumnetworks.com> you wrote: > > I am rather new to U-boot development and will be working on migrating the > current Cavium Octeon U-boot code to a much more up to date version but I > first have some questions. Welcome! I really appreciate that step. > One of the first things I came across is that we need some significant > changes to some of the MIPS specific libraries and start-up code. Should I > just create separate files under arch/mips/xxx or should I create > subdirectories for the Octeon platform like how it's done for the PowerPC? We should in a first step split the current arch/mips/cpu/ into arch/mips/cpu/au1x00/ and arch/mips/cpu/incaip/; common stuff should go to arch/mips/lib/. In the second step, you could add a arch/mips/cpu/octeon/ directory. > These changes would be global across the Octeon and not board specific. A > number of the changes are required for handling multiple cores. > > Down the road we would also like to add our own replacements to some of the > functions provided by U-boot to speed it up on our platform, for example > taking advantage of the hardware CRC and decompression features. Fine. > Also, what would be a good stable starting version to work from? Top of tree. Your code will be picked up by Shinya Kuribayashi and then pulled from his u-boot-mips repository into mainline. If it should turn out that you generate a lot of commits for a longer time (i. e. more than just an initial pile) we can as well give you a separate u-boot-octeon repository. Just let me know when you feel that would help you. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de Life is a process, not a principle, a mystery to be lived, not a problem to be solved. - Gerard Straub, television producer and author (stolen from Frank Herbert??)