Paging wizard needed

[makerimages]

Hi,

As my brain has come to a halt regarding this, I'm hereby offering a non-paid chance to work on OS Zin. What I ask you to implement, is paging code, to the point where libmalloc or similar things can be ported over. What I have to provide you is a reasonably good linked-list implementation of a Physical Memory Manager: https://github.com/makerimages/OSZin/bl ... /mem/pmm.c

Interested? Want to help? Just fork the repo and get craking! Let me know on the repo issue #36, if you do!

Your work will be credited for, where credit is due!

Thanks,
Makerimages

[max]

Paging code != virtual memory management.

Paging code is just some lines of code. What you are looking for is to have someone write your entire virtual memory management code; I consider that to be a major part of the kernel. It also contains a lot of design decisions that you have to make, and will deeply impact the further internal workings of your kernel. If you don't bother implementing it yourself, you can as well just create a linux distro.

[onlyonemac]

@max: That's a little harsh. But, I agree that a) a virtual memory manager is more than just the code to enable paging and b) he's not likely to find someone willing to write a complete virtual memory manager.

@makerimages: I suggest that you try to ask for help where needed, read some tutorials, and work on it little by little. I too am getting rather stuck with the memory manager, but if you take it one step at a time, and implement each small little bit (like the code to allocate a new physical page, then the code to allocate a new virtual page, then the code to allocate a physical page to a virtual page, then the code to link it all together, etc.) then the job will be much easier. A good tutorial, in my opinion, is this one: http://www.brokenthorn.com/Resources/OSDev18.html. It will make more sense if you also read the previous chapter (http://www.brokenthorn.com/Resources/OSDev17.html) on physical memory management which, even though your physical memory manager sounds different to the one in the tutorial (and that is perfectly OK), will help you to understand the virtual memory management chapter as the later chapters build on the earlier ones.

[iansjack]

As my brain has come to a halt regarding this

In that case it's time to take a rest and/or do a little more reading until you get your brain back in gear. If you are going to use paging it is so tightly integrated into the rest of the OS that not understanding it will mean you make poor design decisions.

And, let's face it, what's the incentive for someone else to help you out with the difficult parts of your pet project? Credit given in yet another hobby OS? Don't make me laugh.

[onlyonemac]

And, let's face it, what's the incentive for someone else to help you out with the difficult parts of your pet project? Credit given in yet another hobby OS? Don't make me laugh.

Furthermore, there's no fun in hobby OS development unless you actually do the work yourself. There's nothing like running a machine on only the code that you yourself have written.