Sergey Matyukevich comments

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                                            Sergey Matyukevich

Put non-primary cores to sleep instead of endless loop

Thanks, @Benjoyo ! This makes sense. I'll update the code.

Put non-primary cores to sleep instead of endless loop

Thanks, @Benjoyo ! I made a big pause but recently I resumed the work, so hopefully, I'll be able to finish lesson 7 soon.

Lessons grammar and style validation

Thanks, @gmcclins!

Need to know the ARM version to understand sctlr_el*?

@paulelong Accordingly to [this](https://en.wikipedia.org/wiki/Comparison_of_ARMv8-A_cores) document Coterxt-a53, which is used in the RPi model 3, uses ARM v8.0-A architecture profile. So yes, you got it right. So if you stick with...

One issue that confused me in lesson 6, about link address

This works because compiler only uses relative addresses when compiling `user.c` and `user_sys.S` (those are 2 files that are copied to the new page in the [move_to_user_mode](https://github.com/s-matyukevich/raspberry-pi-os/blob/master/src/lesson06/src/fork.c#L54) function ) So...

One issue that confused me in lesson 6, about link address

Because this is the default behavior: compiler always generates only relative addresses, unless it is not possible or you tell him otherwise

Question about forking user process

Hi @CkTD. Initially, I wrote it exactly as you suggested `*childregs = *cur_regs`. Then I noticed that it doesn't work, I added some debug logging and figured out that the...

Question about forking user process

Hi @nicolasmesa ! This is a good catch, thank you very much for figuring this out and submitting the PR. @CkTD, implementing `memmove`, `memset` and `memcmp` does make sense, but...

How could I boot my pi?

Sure thing @rs, you are welcome. You have to keep all files that were installed on the boot partition by the Raspbian. By emptying the folder you are removing some...

How could I boot my pi?

Sure, it makes sense. I will add this information to the tutorial.