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481 Commits

Author SHA1 Message Date
Bananymous d3e5c8e0aa Kernel: Generalize ATA device and cleanup code 2023-10-12 21:35:25 +03:00
Bananymous f4b901a646 Kernel: Add Timer::ns_since_boot() 2023-10-12 21:16:39 +03:00
Bananymous 790064d248 Kernel: Add vaddr/paddr conversion functions to DMARegion 2023-10-12 15:20:05 +03:00
Bananymous ab8b77406d Kernel: PCI can now get interrupts for devices 2023-10-11 22:18:58 +03:00
Bananymous 1b9e14a53b Kernel: PCI cleanup PCI::Device API 2023-10-11 21:52:08 +03:00
Bananymous 521513bed2 Kernel: make DMARegion::create static and fix mapping 2023-10-08 18:18:36 +03:00
Bananymous 211cad03ff Kernel: Implement bare boness DMA Region 
This does nothing but allocate contiguous physical and virtual memory
and map it as CacheDisable. Also memory is automatically freed RAII style.
 2023-10-08 02:57:22 +03:00
Bananymous 8a9816d6e0 Kernel: Add API for getting contiguous physcial pages 
This will be used to create DMA regions.
 2023-10-08 02:57:22 +03:00
Bananymous 03d2bf4002 Kernel: Rework physical memory allocation 
PhysicalRange is now much simpler bitmap. This makes expanding
PhysicalRange API much easier.
 2023-10-08 02:50:23 +03:00
Bananymous 27364f64a6 Kernel: Rework whole ATA driver structure 
Make ATA driver more compatible when we are adding SATA support
 2023-10-08 02:50:23 +03:00
Bananymous bcf62c5f2e Kernel: Rework interrupt mechanism 
All interruptrable classes now inherit from Interruptable which
has methdo handle_irq which is called on a interrupt.
 2023-10-05 18:53:45 +03:00
Bananymous b712c70c75 Kernel: Expose command line and environment to /proc 2023-09-30 23:01:33 +03:00
Bananymous 797ca65c66 Kernel: Add physical memory info to /proc/{pid}/meminfo 2023-09-30 22:11:45 +03:00
Bananymous a511441f7e Kernel: /proc/{pid}/meminfo now reports per process memory usage 2023-09-30 21:20:18 +03:00
Bananymous cd61d710df Kernel: Add procfs that contains only pids 2023-09-30 21:19:36 +03:00
Bananymous f88ad7efcd Kernel: All process' memory areas can report their virtual mem usage 2023-09-30 21:15:46 +03:00
Bananymous d883d212b1 Kernel/LibC: dirent now contains file type 2023-09-30 20:46:57 +03:00
Bananymous dedb2a2399 Kernel: RamInode verifies that you have not specified mode type 
This is kinda weird behaviour, but it ensures the user cannot
create e.g. CharacterDevice with mode having IFLNK.

The Inode overrider is the only one setting the mode.
 2023-09-30 20:46:57 +03:00
Bananymous 8604c55de8 Kernel: Add API for RamDirectoryInodes to delete containing inodes 2023-09-30 19:22:30 +03:00
Bananymous e949e8550c Kernel: Rework RamInode API 
RamInode is now a general RamInode with no data. RamFileInode is now
a inode for regular files. This is much cleaner and more intuitive
since there is no reason for most non-regular inodes to hold data
Vector.
 2023-09-30 19:22:30 +03:00
Bananymous f953f3d3ff Kernel: Implement MAP_SHARED for regular files 
Every inode holds a weak pointer to shared file data. This contains
physical addresses of pages for inode file data. Physical addresses
are allocated and read on demand.

When last shared mapping is unmapped. The inodes shared data is freed
and written to the inode.
 2023-09-29 18:59:20 +03:00
Bananymous db5d6a7f80 Kernel: Implement MAP_PRIVATE file mappings 
mmap() now supports mapping files with MAP_PRIVATE.
 2023-09-29 17:23:42 +03:00
Bananymous 4a92f44cf6 Kernel: Implement new abstract MemoryRegion 
MemoryBackedRegion now inherits from this and is used for private
anonymous mappigs. This will make shared mappings and file backed
mappings much easier to implement.
 2023-09-29 16:18:23 +03:00
Bananymous 603fc200e6 Kernel: Add some sanity assertions/functions 2023-09-29 02:03:19 +03:00
Bananymous c11e84b248 Kernel: Use the new on demand ELF structure 
All executable files are now read from disk and paged on demand.
This was a big rewrite of the old ELF library but in the end
everything seems much cleaner, since all the old functionality was
not actually needed for execution.

I have to do some measurements, but I feel like memory usage dropped
quite a bit after this change.
 2023-09-29 02:00:10 +03:00
Bananymous f4049be975 Kernel: Fix off by one error when calculating pages in range 2023-09-29 01:56:15 +03:00
Bananymous b51d2f5295 Kernel: mmap regions are now demand paged 
mmap will not actually take any memory unless you use the given
memory.
 2023-09-28 21:07:14 +03:00
Bananymous 547eabb403 Kernel: Reboot will now always succeed 
If acpi reset fails, we forcefully trigger a triple fault to restart
the system.
 2023-09-28 13:53:03 +03:00
Bananymous 79851394b3 Kernel/LibC/Userspace: Add SYS_POWEROFF + cli tool 
You can now shutdown/reboot banan-os with the poweroff cli tool.

Reboot doesn't seem to work on qemu.
 2023-09-28 12:36:47 +03:00
Bananymous fcdc922343 Kernel: Enter ACPI mode with lai 2023-09-28 12:30:27 +03:00
Bananymous f7097398ca Kernel: Make tty overload correct has_data() function 
This allows snake game to work again :)
 2023-09-28 11:54:12 +03:00
Bananymous 8d5369fafe Kernel: Add some functionality to disable TTY input/output 
Userspace programs can call tty_ctrl() to disable/enable tty from
handling input and displaying output.

This API is probably going to change in the future to ioctl calls
but I'm not sure how ioctl is used and what functionality should it
have. I decided to create whole new function and syscall for now.

Next I will expose framebuffer in /dev/fb0 and then I can start work
on graphical environment! :D
 2023-09-27 15:44:05 +03:00
Bananymous 05e57801e7 Kernel: SYS_SYNC now schedules sync to happen soon 
You can pass non-zero argument to the syscall to block until the
sync has finished.
 2023-09-27 00:34:00 +03:00
Bananymous b924c85669 Kernel: DiskCache now requires sync to be called from kernel thread 
This disables the scenario where user interrupts sync operation
possibly leaving the syncing in invalid state.
 2023-09-27 00:32:13 +03:00
Bananymous 09c1aa44d8 Kernel: Allow creationg of empty processes and manual registration 
You can now create kernel processes without any threads, add the
needed threads and only then register the process and its threads
to the scheduler.
 2023-09-27 00:29:45 +03:00
Bananymous 1d470fb5ba Kernel: All syscalls now validate users pointers 
We now validate pointers passed by the user, to forbid arbitary
memory read/write. Now the user is only allowed to pass in pointers
in their own mapped memory space (or null).
 2023-09-25 22:07:12 +03:00
Bananymous 55d30a7cc3 Kernel: Ext2 inodes are now stored in cache 
This allows faster inode access and ensures working inodes when
opened in multiple places.
 2023-09-25 20:31:40 +03:00
Bananymous 8caba1e774 Kernel: Ext2 filesystem now holds 10 preallocated block buffers 
Inodes can query blocks from this buffer. This allows allocation of
blocks to not fail during normal operations. Also less stress on
kmalloc.
 2023-09-25 14:32:25 +03:00
Bananymous 7bdb428938 Kernel: Fix ext2 block allocation 
Redo ext2 block allocation. This is now much "cleaner" although
I'm not too fond of the macros.
 2023-09-25 13:17:44 +03:00
Bananymous 8b2bb95b81 Kernel: VirtualRange doesn't store physical addresses of pages 
This was unnecessarry allocation, since the page table allready
contains virtual address -> physical address mappings.
 2023-09-24 01:29:34 +03:00
Bananymous 2ef496a24a Kernel: all mapped ranges are now stored in one container 
We just now have a flag if a mapping is unmappable
 2023-09-23 23:45:26 +03:00
Bananymous c0a89e8951 Kernel: Fully remove sys_alloc and sys_free 
I could delete the whole FixedWidthAllocator as it was now obsolete.
GeneralAllocator is still used by kmalloc. Kmalloc cannot actually
use it since, GeneralAllocator depends on SpinLock and kmalloc runs
without interrupts.
 2023-09-23 03:53:30 +03:00
Bananymous fc953df281 Kernel/LibC: remove PATH resoltion from kernel 
I have no idea why I had made PATH environment variable parsing
to be part of the kernel. Now the shell does the parsing and
environment syscall is no longer needed.
 2023-09-23 03:08:14 +03:00
Bananymous fe2dca16f0 Kernel/LibC: add flag to enable/disable sse support 
SSE support is very experimental and causes GP. I decided to make
SSE not default until I get to fixing it :)
 2023-09-23 02:28:25 +03:00
Bananymous fee3677fb9 Kernel/LibC: add mmap for private anonymous mappings 
This will be used by the userspace to get more memory. Currently
kernel handles all allocations, which is not preferable.
 2023-09-22 23:01:14 +03:00
Bananymous 9a3286ad57 Kernel: Add constexpr conditional debug prints 2023-09-22 17:20:35 +03:00
Bananymous c9e09b840e Kernel: Add LAI as a dependency 
I did not feel like implementing AML interpreter now, and wanted
everything AML has to offer. I will be writing my own AML interperter
at some point.
 2023-09-22 17:20:35 +03:00
Bananymous 8136248a67 Kernel: Fix timer includes 2023-09-22 17:20:35 +03:00
Bananymous 0d67e46041 Kernel: Add config read/write api to PCI 2023-09-22 17:20:35 +03:00
Bananymous bc1087f5a7 Kernel: Add pointer validation API to page table 2023-09-22 17:20:35 +03:00
Bananymous 7774f56ab6 Kernel: PCI devices can now create region for BAR 
This creates either MEM or IO region for read/write access to PCI
device.
 2023-09-22 17:20:35 +03:00
Bananymous 14a608effd 1000th COMMIT: Kernel: Add basic E1000 driver 
This driver is only capable to read mac address and enable and read
link status
 2023-09-22 17:20:28 +03:00
Bananymous 5fae3cec2a Kernel: Implement SYS_SYNC and add sync executable to userspace 
You can (and have to) manually sync disk after writes to it.
 2023-09-11 01:26:27 +03:00
Bananymous b0c22b61ec Kernel: Writes to disk are not synchronous anymore 
Implement "proper" DiskCache syncing
 2023-09-11 01:25:16 +03:00
Bananymous 202c38a65a Kernel: Improve open() POSIX compatability 
Also rename Process::sys_creat -> create_file since it is not
actually a syscall and only used by open as a healper.
 2023-09-10 00:31:42 +03:00
Bananymous 720bc418a6 All: Clear lines with only whitspace in them 2023-09-10 00:31:42 +03:00
Bananymous d77f455065 Kernel: Add basic ZeroDevice to /dev/zero 2023-09-10 00:31:42 +03:00
Bananymous 7e08f0fb66 Kernel: Start work on making inodes more thread safe 
All inode operations are now locked and thread blocked
 2023-09-10 00:31:42 +03:00
Bananymous 9e4a87021c Kernel: Fix directory permissions 
We did not care about X bit in directories and instead used only the
R bit for search/read.
 2023-09-08 11:46:53 +03:00
Bananymous c1fd341698 Kernel: TTY now reads input byte by byte 
This allows correct behaviour for character streams / keyboard
handling. Serial input can now send working ^C :D
 2023-09-07 15:06:27 +03:00
Bananymous ddd36af0f1 Kernel: Add /dev/tty symlink that targets the current tty 2023-09-05 01:07:52 +03:00
Bananymous 35fd30ee29 Kernel: Implement basic RamSymlinkInode 2023-09-05 01:07:52 +03:00
Bananymous 4a0652684c Kernel: You can now read serial output from the /dev/ttyS* 2023-09-05 01:07:52 +03:00
Bananymous 33c81f00b7 Kernel: Receive interrupts for COM1 and COM2 input 
The input has to still be attached to terminal
 2023-09-04 22:07:40 +03:00
Bananymous 55714b90cd Kernel: Rework whole Terminal structure 
Serial monitors can now be used as a output. This requires editing
init code for the stdio opening. Serial input is not supported, so qemu
still needs graphical window for ps/2 keyboard.
 2023-09-04 19:34:18 +03:00
Bananymous 9b47603a1d Kernel: Make serial devices to their own class 2023-09-04 14:57:05 +03:00
Bananymous 42b85dc33b Kernel: Add ANSI support for hiding/showing cursor to TTY 2023-09-04 14:30:09 +03:00
Bananymous 044378cfa3 Kernel: Add basic nanosleep, only millisecond percision 2023-09-04 12:59:50 +03:00
Bananymous f1d4d5f995 Kernel: Add basic support for O_NONBLOCK (only for tty) 2023-09-04 12:57:52 +03:00
Bananymous 19d0fb6fcd Kernel: add basic fcntl() with couple of commands and no validation 2023-09-04 12:57:09 +03:00
Bananymous 7933265095 Kernel: Split ext2 implementation to multiple files 2023-09-01 15:10:23 +03:00
Bananymous d810644018 Kernel: Start work on writable ext2 filesystem 2023-08-31 23:40:31 +03:00
Bananymous a7bfc1c2ec Kernel: Add missing ififo() to Inode::Mode 2023-08-31 21:38:31 +03:00
Bananymous f1ba5c7e0f Kernel: Process keeps track if forked process has called exec*() 2023-08-22 14:53:46 +03:00
Bananymous 97ea4986af Kernel/LibC: implement proper getpgid and setpgid 2023-08-22 14:53:12 +03:00
Bananymous 25c021c15b Kernel: Add function to enumerate processes in session 2023-08-22 14:52:28 +03:00
Bananymous 42b90ae76c Kernel/LibC: Add {get,set}pgrp() 2023-08-22 11:36:33 +03:00
Bananymous ccc61cb10c Kernel: Barebones implementation sessions and process groups 2023-08-22 11:35:40 +03:00
Bananymous 8e4216215e Kernel/LibC: add dup() syscall and function 2023-08-17 12:03:29 +03:00
Bananymous 38c0bc7bae Kernel: Remove unused syscall 2023-08-11 11:43:48 +03:00
Bananymous a7f37236bf Kernel: Zero initialize threads sse_storage 2023-08-11 00:26:43 +03:00
Bananymous 03d4b47f63 Kernel: HPET is now used in legacy mode when PIC is forced 2023-08-10 22:01:30 +03:00
Bananymous e74fdbc55b Kernel: Remove get_unix_timestamp from SystemTimer 
Kernel now uses the percise real_time() and time_since_boot()
 2023-08-09 08:57:50 +03:00
Bananymous 008c777a9f Kernel: Add PageTable::Flags::CacheDisable 
Also fix multiple places where we were using uint8_t as page table
flags instead of PageTable::flags_t which we promoted to uint16_t
while back.
 2023-08-06 23:59:30 +03:00
Bananymous d8a9d4a24e Kerne: SystemTimer can now output the current real time 2023-08-04 16:06:47 +03:00
Bananymous bc0e1fa898 Kernel: Rename TimerHandler to SystemTimer 
I changed SystemTimer to only handle the "best" supported timer
it can initialize.
 2023-08-04 16:06:47 +03:00
Bananymous 17f1737c9a Kernel: Add function to retrieve boot time as timespec 2023-08-04 16:06:47 +03:00
Bananymous fdae253695 Kernel: Add basic HPET support to replace PIT if exists 
This works same way as the PIT implementation; calls Scheduler every
milli second.
 2023-08-04 15:22:51 +03:00
Bananymous d4adcff958 Kernel: Move sleep() implementation to TimerHandler 2023-08-04 15:15:00 +03:00
Bananymous 2c59c9a3cc Kernel: Add more structures to ACPI 2023-08-04 15:13:47 +03:00
Bananymous 3a59a64355 Kernel: Implement basic MMIO functions 
This is equivalent to IO.h except for memory mapped io instead of
IO ports
 2023-08-04 15:12:29 +03:00
Bananymous 9363c1cdaf Kernel: Move RTC to Timer directory 
PIT ms counter seems to be off by multiple seconds/minute. I will
be probably changing to HPET for system time
 2023-08-04 11:12:16 +03:00
Bananymous 198e6d7cf6 Kernel: Start work on abstracting Timers 2023-08-04 10:29:42 +03:00
Bananymous 07ee898f4f Kernel: Remove unnecessary timer check from Scheduler 2023-08-04 10:29:42 +03:00
Bananymous 91f04ce250 Kernel: Change PageTable API 
Getting free pages not reserves them, so you don't have to hold
the page table lock :)
 2023-08-02 22:09:14 +03:00
Bananymous 926df2b276 Kernel: PageTable now supports reserved pages 
You can now map pages as reserved, so that they will not be given
from get_free_page() or get_free_contiguous_pages().
 2023-08-01 16:35:54 +03:00
Bananymous 217dbca7b7 Kernel: Cleanup returns from any kind on interrupts 2023-08-01 14:23:50 +03:00
Bananymous 8b1bccb79b Kernel: store/load sse/mmx/fpu state on isr/irq/syscall 
I haven't tested this yet but should be fine. This will be optimized
to only save state from threads that are using it
 2023-07-31 22:28:57 +03:00
Bananymous e86e755c51 Kernel: Generally improve signals 2023-07-31 22:28:18 +03:00
Bananymous 6f7d97cf94 Kernel: Remove is_in_syscall from Thread 2023-07-30 14:49:51 +03:00