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198 Commits

Author SHA1 Message Date
Bananymous 96ac072166 Kernel: Heap allows us to take free pages. 
The API is kinda weird and will probably be reworked in near future
but this will work for now :)
 2023-04-18 10:18:15 +03:00
Bananymous 295a27f16a Kernel: Panic wont print stacktrace if it has already paniced 
This prevents stack trace dump to panic and loop
 2023-04-18 10:18:15 +03:00
Bananymous 88f60b5e41 Kernel: Map all ACPI tables on initialization 
This makes their usage much easier and less error prone

They won't mapped be processes when we get to there, so this won't be
a problem
 2023-04-18 10:18:15 +03:00
Bananymous c5347e6707 Kernel: Reorder boot initialization 
We now create the TTY as soon as possible so we can show console
output without serial port.
 2023-04-18 10:18:15 +03:00
Bananymous bf0c7b9ae8 Kernel: Heap implementation can now give free pages from all of RAM 2023-04-18 10:18:15 +03:00
Bananymous 633929629c Kernel: Start working on heap 2023-04-18 10:18:15 +03:00
Bananymous fdb4eb6042 Kernel: Move kmalloc and MMU to Memory directory 2023-04-18 10:18:15 +03:00
Bananymous 8ee63f8264 Kernel: We can create basic userspace processes 
These are still allocated on the kernel memory
 2023-04-12 17:52:36 +03:00
Bananymous 34358b8471 Kernel: Scheduler can now terminate processes threads 2023-04-12 17:49:04 +03:00
Bananymous 3201c3654e Kernel: Threads now use only 4 KiB stack :) 2023-04-12 00:22:08 +03:00
Bananymous 5810a77cbf Kernel: Mark Scheduler::start() as noreturn as appropriate 2023-04-11 23:33:20 +03:00
Bananymous aa2aee684b Kernel: remove message from BAN::Error 
We don't store the error message anymore in BAN::Error.
Instead we store a error code that can be mapped into a string.
This allows BAN::Error to only take 4 bytes instead of 128.

We should also make some kernel initialization just panic instead
of returning errors since they are required for succesfull boot
anyway.
 2023-04-11 23:25:21 +03:00
Bananymous cfa025acae BAN: Move RefPtr to its own file and create New.h 
New.h contains definitions for placement new operators and
BAN::allocator and BAN::dealloctor
 2023-04-10 21:07:25 +03:00
Bananymous f924ac9265 Kernel: Threads can now be terminated mid execution 2023-04-10 21:07:25 +03:00
Bananymous f281543255 Kernel: Add tty to process and make termios modifiable 2023-04-05 02:53:28 +03:00
Bananymous 4f522d337a Kernel: Add partial support for shell 
We don't handle arrow keys, and the tty does not know how to clear
the screeen :D
 2023-04-05 01:30:58 +03:00
Bananymous af0979ec32 Kernel: Process can now initialize stdio 
This allows the use of the fds STD{IN,OUT,ERR}_FILENO
 2023-04-05 01:10:25 +03:00
Bananymous 7f95444bb5 Kernel: Start work on making tty a file 
TTY is now a file that you can read from/write to. I still have
to port shell to use this new interface
 2023-04-05 00:56:09 +03:00
Bananymous 783842bac2 Kernel: add virtual write function to inode 2023-04-03 20:29:07 +03:00
Bananymous ee1f3623ce Kernel: Fix typo 2023-04-03 19:56:55 +03:00
Bananymous b87dae7e7c Kernel: Device dev and rdev number is done more properly 
Also hd* partitions are now 1 indexed instead of 0
 2023-04-03 11:43:16 +03:00
Bananymous c936aac777 Kernel: Optimize scheduler idling 
Now after each interrupt we will ask the scheduler to reschedule
if the current thread is the idle thread. This allows semaphore
unblocking to be practically instant when there is only one thread
executing.

Now disk reading is back to ~3 MB/s for single threaded process
 2023-04-03 01:51:05 +03:00
Bananymous 46d65471d9 Kernel: ATA now uses irqs instead of polling 
Reading is now much slower at ~500 kB/s it was around 3 MB/s.
This is probably mostly due semaphore blocking taking atleast
until next reschedule (1 ms itervals). This will be a problem
as long as we are using only single processor.

I could try to use {READ/WRITE}_MULTIPLE commands, but since
most of the disk reads are 2 sectors (inode block size) this
will at most double the speed.

Most efficient speed up would of course be caching disk access
data and inodes overall.
 2023-04-03 00:03:38 +03:00
Bananymous dcc174b62e Kernel: Move ATADevice to its own file from ATAController 
The API is kinda weird since device reads/writes go from
ATADevice -> ATAController -> ATADevice
but this is for now atleast necessary since ATAController has(?)
to keep all devices from using the disks at the same time
 2023-04-02 18:26:19 +03:00
Bananymous cbb0f6be9a Kernel: cleanup includes 
I went quickly went through all files since I found some weird
includes :D
 2023-04-01 02:14:49 +03:00
Bananymous a60f8098ee Kernel: Fix traversing back from mount points 2023-04-01 01:54:35 +03:00
Bananymous 8b5d8d9f8a Kernel: Process gets absolute paths for mount 2023-04-01 00:30:11 +03:00
Bananymous db65cfeb8a Kernel: Cleanup ATA device initialization 2023-03-31 00:58:57 +03:00
Bananymous a3ba6da6f3 Kernel: Move DeviceManager to its own file 2023-03-30 22:39:45 +03:00
Bananymous b048630e5b Kernel: Improve locking in Process, VFS and ATAController 
We used to block on all process access. This meant that shell
reading the keyboard input would block all VFS access making disk
accesses practically impossible. We now block only when it is
necessary :)
 2023-03-30 22:02:16 +03:00
Bananymous dcee92a6bc Kernel: Thread is no longer RefCounted 
This makes developement with Scheduler much easier against compiler
optimizations. I could now remove the pragma GCC optimize stuff.
 2023-03-30 19:16:51 +03:00
Bananymous c2e3b422cc Kernel: Add Semaphore to block threads 2023-03-30 18:46:33 +03:00
Bananymous d4c03d3939 Kernel: root partition is now passed from the commandline 2023-03-30 18:46:19 +03:00
Bananymous 8e68d2e3ea Kernel: Shell can now mount partitions 2023-03-30 15:06:41 +03:00
Bananymous 30c33b55e3 Kernel: Inode::Mode is now a struct so we can have functions in it 2023-03-30 14:41:15 +03:00
Bananymous e2791e5260 Kernel: StorageDevices and Controllers are now devices 2023-03-30 14:22:15 +03:00
Bananymous 88a8bd659d Kernel: Add IFBLK, IFLNK, IFSOCK to Inode::Mode 2023-03-30 13:15:46 +03:00
Bananymous f9cc114907 Kernel: All devices have atime, mtime, ctime at their creation 2023-03-30 13:15:46 +03:00
Bananymous 9a4d603a62 Kernel: Remove the mount test from VFS 2023-03-30 11:43:24 +03:00
Bananymous 78ea4b2207 Kernel: fix stat command and device numbers 2023-03-30 10:43:08 +03:00
Bananymous ab3cdea548 Kernel: Rewrite mounting code 2023-03-29 21:34:48 +03:00
Bananymous dd84a2175f Kernel: Move Partition out of StorageDevice and rename functions 2023-03-29 13:23:01 +03:00
Bananymous 62fb233eb1 Kernel: DeviceManager is now a 'FileSystem' so it can expose devices 
Shell reads keyboard through /dev/input :)
 2023-03-29 11:50:46 +03:00
Bananymous 16d9d29971 Kernel: Remove obsolete KeyboardLayout/ 
This was used by the old input system. Currently keyboard layout is
hardcoded to finnish. But it will be reworked as something read from
the filesystem
 2023-03-29 03:09:14 +03:00
Bananymous fa8e921ee8 Kernel: Rework the whole input system 
We now use Device abstraction that will allow us to provide devices
to userspace through /dev. Currently Shell reads from first and only
device (it being PS/2 Keyboard).
 2023-03-29 03:05:16 +03:00
Bananymous c7286396d8 Kernel: Move ACPI to its own file 2023-03-27 17:30:45 +03:00
Bananymous 666051fd34 Kernel/BAN: move unix time conversion to BAN and add stat to Shell 2023-03-27 00:49:58 +03:00
Bananymous e55860eb6b Kernel: Rework processes and VFS so we don't expose inodes 
Everything is now done through a file descriptor.
 2023-03-26 04:30:57 +03:00
Bananymous 1fade1aa9e Kernel: Process::working_directory() is now thread safe 
I realized you cannot return a stirng view and it to be thread safe
 2023-03-24 01:46:25 +02:00
Bananymous 814f0b215d Kernel: Create RecursiveSpinLock and add it to Process 
We now lock every function within Proccess, just to be sure.
Recursive lock allows us to use lock from the same thread even if
we already have the spinlock locked
 2023-03-24 01:32:35 +02:00