I've said It yet. > As this > form, we don't need to know how many cores has the processor and set the > core number in Mach in compilation time. Instead, the same processor will > detect the cores number and configure SMP automatically.
I don't know the exact assembly instructions, but I read about the processor can be configured from assembly to run in multicore mode. Then, what we had to do is to write a routine that initializes the processor with this multicore support, during Mach boot. In this guide, in Chapter 8.4 feels to be a better explanation about how to do this (initialization example in 8.4.4): https://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-vol-3a-part-1-manual.html El jue., 30 ago. 2018 a las 17:35, Richard Braun (<rbr...@sceen.net>) escribió: > On Thu, Aug 30, 2018 at 05:32:40PM +0200, Almudena Garcia wrote: > > Excuse me, It's a little offtopic. > > > > I was talking about implement SMP via hardware in Hurd (Mach really). In > > this implementation, Mach configures the processor during the boot, > > enabling multicore support. (All Pentium 4 or modern x86 processor > supports > > this) > > > > In the current SMP support, this multicore support feels been build from > > software, generating the threads and assigning It to the processor from > > software. Then, my idea is to start a project to change this SMP software > > to a newer implementation via hardware, as I previously said. As this > > form, we don't need to know how many cores has the processor and set the > > core number in Mach in compilation time. Instead, the same processor will > > detect the cores number and configure SMP automatically. > > > > https://c9x.me/x86/html/file_module_x86_id_45.html > > > > > https://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-vol-3a-part-1-manual.html > > What is "a newer implementation via hardware" ? Can you be very specific > about what you're referring to ? > > -- > Richard Braun >
