From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikolay Dimitrov Date: Sun, 22 Jun 2014 18:41:24 +0300 Subject: [U-Boot] [PATCH v2] mx6: add support of multi-processor command In-Reply-To: <53A6E729.9030302@huau-gabriel.fr> References: <53A6E398.7060908@mail.bg> <53A6E729.9030302@huau-gabriel.fr> Message-ID: <53A6F924.9020806@mail.bg> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Gabriel, On 6/22/2014 5:24 PM, gabriel huau wrote: > Hi Nikolay, > > I agree that you have to modify those OS to support 'multi-OS' on > different core but this customization is not part of u-boot in my > sense. For the second point, I have to disagree, the imx6 is totally > appropriate for AMP/multi-OS, in my case, I wasn't thinking about > virtualization which is something different but really about > multi-OS/Bare Metal application. The interrupt controller (GIC) can be > configured to distribute any interrupt on any core, for example, you > can have UART1 interrupt on core0 and UART2 interrupt on core1. > The only problem is the resource partitioning but as I said this is > another subject which is not really part of u-boot and I already did > some test by running Android on core0 and QNX on core1 without any > problem as a proof of concept. > > A good example may be the support on this kind of application on the > Zynq: > http://www.wiki.xilinx.com/Multi-OS+Support+%28AMP+%26+Hypervisor%29 > This is also a Cortex A9 without the support of virtualization > extensions. Thanks for sharing this info, I'll check it out. I come from the automotive industry where no one will allow running 2 OSes without hardware isolation, so this is how my opinion about AMP on imx6 was formed. And I agree that this actually isn't related with U-Boot itself other than just loading the payload and starting the extra cores. Kind regards, Nikolay