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7467 commits

Author SHA1 Message Date
Andreas Kling
56c1f9db8e A userspace process can now GPF and the OS goes on! 
This is really rickety, but it kinda sorta works for my test GPF!
 2018-10-17 23:49:32 +02:00
Andreas Kling
77299cf54d Add basic paging. Only identity maps the bottom 4MB as a start. 2018-10-17 23:13:55 +02:00
Andreas Kling
286e27ef40 Allow running in QEMU with "./run q" 
The kernel doesn't run in QEMU right now and I don't know why.
 2018-10-17 16:58:35 +02:00
Andreas Kling
8ff394f83f Fix a dumb in buffer_putch. 2018-10-17 16:56:47 +02:00
Andreas Kling
9aa88fe186 Add a PIC::getISR() helper. 2018-10-17 16:54:49 +02:00
Andreas Kling
e0f31d38a2 Add -fno-pic -fno-pie to build flags. 2018-10-17 16:49:30 +02:00
Andreas Kling
f82b25d4f9 Fix some minor build warnings. 2018-10-17 16:48:43 +02:00
Andreas Kling
39fa1eb2c2 Print the contents of motd.txt on boot. 2018-10-17 12:07:39 +02:00
Andreas Kling
705832f387 List the root directory after mounting /. 
So cool that it works! It's spewing out a bunch of terminal escape sequences
that the OS console obviously doesn't support, but we'll get there too.
 2018-10-17 11:47:14 +02:00
Andreas Kling
b05ed591ab VFS mounts an ext2fs root! :^) 2018-10-17 11:44:06 +02:00
Andreas Kling
d2425495ca VirtualFileSystem class builds inside Kernel. 2018-10-17 11:40:58 +02:00
Andreas Kling
9171521752 Integrate ext2 from VFS into Kernel. 2018-10-17 10:57:23 +02:00
Andreas Kling
aec8ab0a60 Add the basic character devices to kernel. 2018-10-16 14:33:16 +02:00
Andreas Kling
12e515735b Add a simple IDEDiskDevice class that implements DiskDevice from VFS. 2018-10-16 14:17:43 +02:00
Andreas Kling
72bb80a9ae These changes were lying around uncommitted in the old repo. 
I'm just gonna commit them without too much thinking and then take
it from there.
 2018-10-16 11:06:35 +02:00
Andreas Kling
87d41bdca4 If an interrupt comes from the slave PIC, both PICs need an EOI. 2018-10-16 11:05:29 +02:00
Andreas Kling
9396108034 Import the "gerbert" kernel I worked on earlier this year. 
It's a lot crappier than I remembered it. It's gonna need a lot of work.
 2018-10-16 11:02:00 +02:00