jordan/rpi4-osdev
1
0
Fork 0
mirror of https://github.com/isometimes/rpi4-osdev synced 2024-11-22 10:10:45 +00:00
Code Issues Projects Releases Packages Wiki Activity

Added link from part12 to part13

Browse source
This commit is contained in:
isometimes 2021-10-13 20:07:43 +01:00
parent b69400094d
commit 6261ca9416
1 changed files with 7 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
part12-wgt/README.md
View file

@ -26,7 +26,7 @@ So... to build the first WGT sample simply type `cp samples/wgt01.c .` from the
boot/boot.S changes boot/boot.S changes
------------------- -------------------
We're still booting into a multicore environment (just in case we need it). There are a few significant changes to _boot/boot.S_ though. I will write more on these later, but (for now) they are: We're still booting into a multicore environment (just in case we need it). There are a few significant changes to _boot/boot.S_ though. They are:
* Enable FPU (floating-point unit) access so we can do non-integer mathematics * Enable FPU (floating-point unit) access so we can do non-integer mathematics
* Switch from EL3 (supervisor exception level) down to EL1 (kernel exception level), disabling the MMU all the same * Switch from EL3 (supervisor exception level) down to EL1 (kernel exception level), disabling the MMU all the same
@ -45,6 +45,10 @@ at the top of each of _wgt/mouse.c_ and _lib/bt.c_. Without this `#define`, the
Work in progress! Work in progress!
----------------- -----------------
This part is still work in progress - and it's a lot of work - so keep watching this space! There's always more that can be done, but I do think this was a good exercise in exploring the joy of getting other people's code to run on your own OS! It's quite a thrill.
_In the meantime, do have a go at building some of the samples (hint: wgt20 and wgt60 are fun!)..._ _Do have a go at building some of the samples (hint: wgt20 and wgt60 are super fun!)..._
I'm going to move on from here now so we can continue to make progress on the OS itself.
[Go to part13-interrupts>](../part13-interrupts)