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108 Commits

Author SHA1 Message Date
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 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 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 9756de02ef Kernel: MMU now takes flags when allocating pages 2023-03-01 21:21:56 +02:00
Bananymous 80f9428337 Kernel: Fix prefs font for 32 bit 2023-02-24 03:19:54 +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
Bananymous 1bd8b0fe5c Kernel: Sleep now actually sleeps and allows idling 2023-02-19 18:52:25 +02:00
Bananymous 6fab26692b Kernel: remove unnecessary function from x86_64 Thread.S 2023-02-02 23:48:18 +02:00
Bananymous 5b5e620d8a Kernel: Improve multithreading support 
We can now use arbitary BAN::function<void(...)> as the Thread.
I also implemented multithreading for i386 since it was not done
on the initial multithreading commit.
 2023-02-02 23:24:12 +02:00
Bananymous c85b97abee Kernel: fix some of i368 IDT. This was really broken 2023-02-02 15:52:06 +02:00
Bananymous 01f267a321 Kernel: fix spinlock for i386 2023-02-02 15:49:00 +02:00
Bananymous 9b8de5025a All: rename every function from UpperCamelCase to snake_case 
This was a mess since I didn't know which to use but now I decided
to go with snake_case :)
 2023-02-01 21:05:44 +02:00
Bananymous 337569b0ca Kernel: Implement basic SpinLock 2023-02-01 01:52:52 +02:00
Bananymous cb3b62d665 Kernel: Only allocate single GDT entry during boot.S 
When we need more, we should probably initialize rest of them
in cpp code
 2023-01-31 18:43:09 +02:00
Bananymous 1687028ed5 Kernel: Add constructor and destructor to MMU 2023-01-30 18:54:04 +02:00
Bananymous 6dc22b7251 Kernel: Add actual register values to x86_64 kernel panic 
Very hackish implementation, but we now get actual registers at the
time of the interrupt happening
 2023-01-30 18:52:38 +02:00
Bananymous 6418d7cfc3 Kernel: Add Other GDT entries to x86_64 2023-01-26 12:53:04 +02:00
Bananymous 35d2e27292 Kernel: Improve MMU 
We don't have to invalidate page in AllocatePage() if we don't make
any changes. We also should not assert on deallocating non-present
pages, just return early :)
 2023-01-26 02:57:14 +02:00
Bananymous 589f338357 Kernel: Cleanup IDT register dump inline assembly 2023-01-26 02:57:14 +02:00
Bananymous e87026f01d Kernel: I have no idea what this commit does 
I had committed a change in IDT but reverted it now.

This propably only adds a spurious interrupt detection to common cpp
interrupt handler?
 2023-01-26 02:55:37 +02:00
Bananymous c0bc002ac6 Kernel: Move debug printing to its own file 
It didn't make sense that dprint was defined in Serial.h.
We also now dump dprint to tty if there is no serial and tty is initialized
 2023-01-25 22:51:42 +02:00
Bananymous b315fdc27f Kernel: Finally managed to get 64-bit working 
I had weird problems with interrupts but everything should work now
 2023-01-25 19:19:28 +02:00
Bananymous c4670f49d4 Kernel: Refactor some IDT code 2023-01-25 19:19:28 +02:00
Bananymous ba53582f23 Kernel: Rewrite APIC and PIC more OOP friendly 
x86_64 port is slowly coming together
 2023-01-23 20:13:57 +02:00
Bananymous 54043288cb Kernel: Move CPUID out of arch/ 
CPUID instructions behaves the same on x86 and x86_64. I am not
planning on supporting any non x86 based architectures.
 2023-01-23 18:12:52 +02:00
Bananymous 1b9f7aa815 Kernel: Rewrite the whole VESA driver 
We dont support vga text mode currently. I might add it later if needed.

I also removed mouse 'support' from Shell since it didn't do anything
and I didn't implement arbitary bitmap rendering to framebuffer
 2023-01-23 13:21:53 +02:00
Bananymous 10c7ef7baa Kernel: MMU rename weird variable 2023-01-22 20:16:44 +02:00
Bananymous 62469c529f Kernel: IDT now allocates descriptors with kmalloc_eternal 2023-01-22 03:18:42 +02:00
Bananymous cdd27ae3db Kernel: rename MMU::m_page_directory_pointer_table -> m_highest_paging_stuct 
This might not always be pdpt. In x86_64 it is pml4/pml5
 2023-01-22 03:03:58 +02:00
Bananymous 6ec4ba3dc9 Kernel: Move dump_backtrace() out of arch. 
I discovered __builtin_frame_address()
 2023-01-22 03:00:13 +02:00
Bananymous fbfb3d6b70 Kernel: IDT cleanup GateDesctiptor usage 
And move everything to IDT namespace
 2023-01-22 02:06:43 +02:00
Bananymous 558374a47c Kernel: IDT flush only once in initialization 2023-01-22 02:06:43 +02:00
Bananymous 6e24ef8323 Kernel: IDT cleanup Kernel panic messages 2023-01-22 02:06:43 +02:00
Bananymous 3e8fbbaabd Kernel: Fix small typos in IDT 2023-01-22 01:12:47 +02:00
Bananymous 491610db2c Kernel: move GDT initialization to boot.S 2023-01-22 00:48:12 +02:00
Bananymous aac7595a47 Kernel: cleanup boot.S code and enable SSE 2023-01-21 23:44:23 +02:00
Bananymous b5453fad5c Kernel: dump_stacktrace uses now "\r\n" line endings for bochs 2023-01-21 22:21:38 +02:00
Bananymous bb051604a1 Kernel: Move dump_stacktrace() to arch folder 
It uses mov instruction which has different register on x86/x86-64
 2023-01-21 22:16:31 +02:00
Bananymous 9e092c80c0 Kernel: Cleanup boot.S 2023-01-21 22:16:01 +02:00
Bananymous b9a4530e54 Kernel: Kernel::Panic now dumps stacktrace to com1 2023-01-16 21:50:50 +02:00
Bananymous 73abc3b2ee fixup! Kernel: Move GDT to its own namespace and cleanup 2023-01-16 15:24:59 +02:00
Bananymous 46e5b3f3d6 Kernel: Move GDT to its own namespace and cleanup 2023-01-16 15:24:10 +02:00
Bananymous 32453daf66 Kernel: actually dont map page 0 2023-01-13 15:04:06 +02:00
Bananymous 416a41745f Kernel: Kernel::Panic now checks that TTY is initialized instead of VESA 2023-01-13 15:04:06 +02:00
Bananymous 77e82de51e Kernel: Make IDT exceptions use a single Kernel:Panic 
This allows IDT to print exceptions even when we dont have TTY
 2023-01-13 15:04:06 +02:00