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248 Commits

Author SHA1 Message Date
Bananymous 1a26a318a4 Kernel: Rework filesystem reading 
We now read from a filesystem to user provided buffer.

Read sizes are determined by read call.

You should now get file descriptors and do reading through Process::current()
 2023-03-17 21:18:41 +02:00
Bananymous 1f2ceeb329 Kernel: VFS caches currently open inodes 2023-03-16 15:31:33 +02:00
Bananymous 1b7625581d Kernel: Add basic concept of Processes 
We now create Shell as a process that has its own threads
 2023-03-16 12:17:04 +02:00
Bananymous c012822d49 BAN: Rename StringView suffix from _sv to sv 2023-03-16 12:15:16 +02:00
Bananymous 8b8e3cbbf0 Kernel/Userspace: Start initial work on userspace and syscalls 2023-03-13 15:32:46 +02:00
Bananymous af854ec9e1 Kernel: Thread creation now takes void(*)() as entry and void* as data 
This simplifies threading for the future and gets rid of (undefined?)
cast of member function pointer to address
 2023-03-09 15:33:42 +02:00
Bananymous 8dbece9119 Kernel: kmalloc minimum align is forced to s_kmalloc_min_align 2023-03-09 14:37:25 +02:00
Bananymous 8940ff8002 Kernel: You don't have to check whether VFS is initialized or not 
VFS now returns Error when attempting to traverse inodes if it did
not find root partition
 2023-03-09 02:31:24 +02:00
Bananymous fc58baf54d Kernel: if VFS initialization does not find root, we fail 2023-03-09 02:17:42 +02:00
Bananymous 2e6e0d0ef5 Kernel: FIX ubsan complaining about unaligned addresses for STDHeaders 2023-03-08 22:55:44 +02:00
Bananymous 371dfe8ef3 BAN: Formatter now uses perfect forwarding on its arguments 2023-03-08 21:31:26 +02:00
Bananymous 7458f68c38 BAN: Error can now be constructed from c_string or format string 
If the resulting string would overflow, we just truncate it to fit
the error message buffer (128) bytes
 2023-03-08 17:05:37 +02:00
Bananymous d90aba0963 Kernel: Create CriticalScope and fix kmalloc 
This disables interrupts for the current scope and restores them
after the scope. This is used in kmalloc, since scheduler might
call into kmalloc/kfree, but deadlock if some thread is currently
trying to allocate. This allows us to use kmalloc in Scheduler.
 2023-03-08 13:55:53 +02:00
Bananymous a068d828fe Kernel: ATA reads go through the ata controller and not only device 2023-03-08 03:26:25 +02:00
Bananymous 1dabe7a222 Kernel: More rework on Scheduler 2023-03-08 03:26:25 +02:00
Bananymous e7a577f54a Kernel: fix includes 2023-03-08 03:26:25 +02:00
Bananymous 23b3028e15 Kernel: Rename RefCounted -> RefPtr and implement RefCounted 2023-03-08 03:26:25 +02:00
Bananymous f7ebda3bf1 Kernel: Move interrupt related functions to InterruptController 2023-03-08 03:16:51 +02:00
Bananymous b5673278c4 Kernel: Disable color after Debug::dump_stack_trace 2023-03-08 02:41:44 +02:00
Bananymous 0b62729887 Kernel: Scheduler sleeping is working 
We have to disable optimization for one function, but I'm working
on a fix
 2023-03-08 02:41:44 +02:00
Bananymous b8ee77eb78 Kernel: Initial work on new scheduler with queues 
Sleeping is definately broken
 2023-03-08 02:41:44 +02:00
Bananymous a9acf1f6dc Kernel: PCIDevice is now class with getters and constructor 2023-03-08 02:41:44 +02:00
Bananymous 42c33ebfb3 Kernel: kmalloc aligns size to s_kmalloc_min_align 
We don't get unaligned memory anymore from kmalloc
 2023-03-08 02:41:44 +02:00
Bananymous ed18d86f08 Kernel: Fix spinlock unlocking in x86_64 
Spinlock unlock used a 64 bit write on 32 bit integer, overwriting
some random memory. This caused some really hard to find bugs
 2023-03-08 02:41:44 +02:00
Bananymous df8811fc1a Kernel: Remove "a" from .section .text 2023-03-07 01:57:09 +02:00
Bananymous 8a52c0f9d7 Kernel: Cleanup RSDP parsing code 2023-03-07 00:41:13 +02:00
Bananymous 06db890d49 Kernel: Add ubsan 
My brain has been melting since I'm getting very random bugs.
I hope I can debug them better with ubsan :)
 2023-03-06 23:38:05 +02:00
Bananymous d5f302a68b Kernel: kmalloc now uses two locks 
One for fixed allocations and one for general allocations
 2023-03-06 12:40:35 +02:00
Bananymous f1f5e76636 Kernel: kmalloc requires alignment to be power of two 2023-03-02 22:31:13 +02:00
Bananymous 52aa98ba25 Kernel+LibC: Add some errno codes 
Kernel now returns ENOMEM and other errnos, so we dont have to write
error messages
 2023-03-02 21:10:44 +02:00
Bananymous 90a7268e5a BAN: Rewrite RefCounted to return ErrorOr 2023-03-02 12:30:11 +02:00
Bananymous 1dd61e93b6 Kernel: Threads cannot take arguments anymore 2023-03-02 01:56:09 +02:00
Bananymous 4d8bdec16d Kernel: fix i386 MMU 2023-03-02 00:47:29 +02:00
Bananymous 7fcbb869e1 Kernel: Initialize GDT in kernel code 
We dont use the boot GDT only while booting
 2023-03-01 21:21:56 +02:00
Bananymous 7f8cad83b1 Kernel: x86_64 boot script now makes GDT with null, kernel code and data 2023-03-01 21:21:56 +02:00
Bananymous ba8c4dbc7f Kernel: panic now disables interrupts as the first thing 2023-03-01 21:21:56 +02:00
Bananymous 9756de02ef Kernel: MMU now takes flags when allocating pages 2023-03-01 21:21:56 +02:00
Bananymous 7d84f290a1 Kernel: Add lock to Disk reads before I forget 2023-02-26 03:48:11 +02:00
Bananymous ee5d02aa70 Kernel: Rewrite basically all current disk io stuff 
This is a big commit that was kinda hard to split to smaller ones.

Essentially we now look at all the mass storage devices from PCI
and initialize (P)ATA devices. This doesn't provide any more functionality
but better abstractions and everything doesn't have to be on its old
default port that might be different for modern computers.
 2023-02-26 03:00:29 +02:00
Bananymous 40cf68a22a Kernel: Shell now sleeps through Scheduler and doesn't 'hlt' 
ls doesn't crash when trying to list file
 2023-02-26 02:57:27 +02:00
Bananymous 04bb08d27f Kernel: Add basic PCI enumeration 2023-02-26 02:56:53 +02:00
Bananymous 34f9912a1d Kernel: Add IO functions inl, outl, and ins{b,w,l} to read into buffer 2023-02-24 12:39:38 +02:00
Bananymous 80f9428337 Kernel: Fix prefs font for 32 bit 2023-02-24 03:19:54 +02:00
Bananymous 390a747768 Kernel: Add prefs font for terminal output before file system 2023-02-23 01:22:50 +02:00
Bananymous a4980acc88 Kernel: Fonts can now be parsed from the filesystem and set to terminal 
We currently dont have a fallback font if we cannot get to filesystem
initialization, but that will come later. I can't test on real hardware
for this reason.
 2023-02-22 22:29:31 +02:00
Bananymous 0e668738dc Kernel: Make some basic bitmap font parsing code 2023-02-22 22:28:12 +02:00
Bananymous a3e9e7d125 Kernel: Fix some shell commands 2023-02-22 21:55:32 +02:00
Bananymous 4cd99c71ca Kernel: kmalloc uses now spinlock and fix kmalloc_fixed() 2023-02-22 21:49:28 +02:00
Bananymous c9ea22f5e2 Kernel: IDT now confirms that it allocated succesfully 2023-02-22 21:48:40 +02:00
Bananymous d9c05b7378 Kernel: rewrite the whole kmalloc (again) 
Performance of the old kmalloc implementation was terrible.
We now use fixed-width linked list allocations for sizes <= 60 bytes.
This is much faster than variable size allocation.

We don't use bitmap scanning anymore since it was probably the slow
part. Instead we use headers that tell allocations size and aligment.

I removed the kmalloc_eternal, even though it was very fast, there is
not really any need for it, since the only place it was used in was IDT.

These changes allowed my psf (font) parsing to go from ~500 ms to ~20 ms.
(coming soon :D)
 2023-02-22 16:32:50 +02:00