Re: How do I learn the Hurd stuff?

[Almudena Garcia]

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 (<rbraun@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