5d2bfc858e
Kernel: SYS_FORK can now fail instead of panicing on error
2023-07-19 17:47:12 +03:00
9ea2c1d932
Kernel: Support execute disable bit
...
We will now map executable memory explicitly as executable.
2023-07-13 14:28:53 +03:00
297e65f19a
Kernel: CPUID can detect wether cpu supports nxe bit
2023-07-13 14:24:58 +03:00
65559a3e44
Kernel: Fix multiple bugs with terminal
2023-07-13 13:09:52 +03:00
9bcfb34524
Kernel: Rewrite whole device structure
...
We now have DevFileSystem which is derived from RamFileSystem. All
devices are RamInodes. We don't have separate DeviceManager anymore.
To iterate over devices, you can loop througn every inode in devfs.
2023-07-10 23:17:14 +03:00
ee4ef6638c
Kenrel: RamInode now implements truncate()
2023-07-10 16:07:09 +03:00
0910958c04
Kernel: OpenFileDescriptors can now store more than 8 bits of flags
2023-07-10 16:06:36 +03:00
d6408bcf17
Kernel: add O_TRUNC
...
this is not supported by anything yet
2023-07-10 15:48:18 +03:00
89d4fa4d9b
Kernel: Ext2 fill now return ENOTSUP on write
...
We used to crash the kernel
2023-07-10 15:34:25 +03:00
f7c4bc908e
Kernel: open() and openat() now take mode as parameter
...
O_CREAT now tries to create file if O_CREAT is specified
2023-07-10 15:08:54 +03:00
a0ecbed726
Kernel: You can now read/write to RamInodes
...
RamFS should be stored on physical pages and not in kmalloc, but
that will be implemented later :)
2023-07-10 14:09:35 +03:00
74fc0aa308
Kernel: Inode::create_file() now takes uid and gid as parameters
2023-07-10 13:32:10 +03:00
d5f0448e48
Kernel: start work on ram file system
2023-07-10 13:26:14 +03:00
d713f252aa
Kenrel: Fix inode comparison
...
We should not compare rdevs
2023-07-10 11:48:11 +03:00
5ec2d85081
Kernel: Inode rename directory functions
2023-07-10 11:48:11 +03:00
0d132ee518
Kernel: Mark Ext2 classes final
2023-07-10 11:48:11 +03:00
80c8d52dc5
Kernel: add more functionality to PCI
2023-07-09 23:04:11 +03:00
a2f5ad7bed
Kernel: Move open file descriptors to their own class
...
This simplifies code a lot :)
2023-07-07 23:11:37 +03:00
07fec6e211
Kernel/LibC: add basic dup2
2023-07-06 23:17:54 +03:00
4cd72992c8
Kernel/LibC: Add basic pipe() syscall and command
...
You can now create pipes :)
2023-07-06 22:16:26 +03:00
1fb305fa45
Kernel/LibC: add clock_gettime() for CLOCK_MONOTONIC
...
This gets the number of milliseconds since boot
2023-07-06 00:38:29 +03:00
4086d7c3be
Kernel: rework the whole PageTable structure
...
We now have page table structure for kernel memory which is shared
between all processes.
2023-07-05 23:41:35 +03:00
7d254c26bc
Kernel: Rewrite and optimize DiskCache
...
DiskCache now consists of PageCaches which are caches of contiguous
sectors. This allows the disk cache to be ordered and faster traversal.
We seem to have a problem somewhere during reading. The stack gets
corrupted.
2023-06-19 10:31:47 +03:00
9a7b2587af
Kernel: kmalloc has now somewhat dynamic storage
...
Allocations bigger than PAGE_SIZE and those not forced to be identity
mapped are now done on a GeneralAllocator. This allows us to use kmalloc
for big allocations; bigger than the fixed 1 MiB storage.
This is still a hack and the whole kmalloc will have to be rewritten at
some point, but for now this does the job :D
2023-06-18 23:27:00 +03:00
09c824b90e
Kernel: Add GeneralAllocator::paddr_of
...
Yoy can now query physical address of a virtual address for general
allocator allocation
2023-06-18 23:25:51 +03:00
44fb3945df
Kernel: General allocator takes first valid vaddr as parameter
2023-06-17 22:23:34 +03:00
5dcc53bcf2
Kernel: Make disk IO blocking thread safe
...
This was causing a lot of deadlocks on vms without kvm accel
2023-06-12 18:57:47 +03:00
23543b15ca
Kernel: Rework syscall calling
...
I removed the intermediate function when calling syscalls. Now syscall
handler calls the current process automatically. Only exception is
sys_fork, since it needs a assembly trampoline for the new thread.
2023-06-12 14:16:48 +03:00
2253c45feb
Kernel: Remove Shell from kernel
...
This is now obsolete since we have a userspace Shell.
2023-06-12 02:04:52 +03:00
f09b82c4b5
Kernel/LibC: add SYS_{SET,GET}_PWD and chdir, getpwd
2023-06-12 02:02:52 +03:00
11b68f6a53
Kernel: Add SYS_GET_{,E}{UID,GID}
2023-06-11 22:37:00 +03:00
3fe67e4882
Kernel: Add syscalls for set{,e,re}{uid,gid}
2023-06-11 22:37:00 +03:00
c7ec19c25c
Kernel: Add basic Credentials for the system
...
Now filesystem access/open, etc confirm that you have access for rwxs
2023-06-11 20:06:06 +03:00
64890bb640
Kernel: Add SYS_OPENAT
2023-06-11 03:29:22 +03:00
01311b470f
Kernel: Rewrite directory listing so it can be integrated to libc
2023-06-11 00:17:18 +03:00
4cdeb98897
Kernel: We now store the processes exit code
2023-06-10 17:31:56 +03:00
1aec3fcedd
Kernel: Scheduler now has reschedule()
...
This can be called from anywhere and just causes the scheduler to
schedule the next thread. This is more efficient and verbose version
of Scheduler::set_current_thread_sleeping(0), since we don't have
to wake other threads or do other verifications.
2023-06-09 00:47:17 +03:00
aec63081e2
Kenrel: Rename Scheduler::reschedule -> Scheduler::timer_reschedule
2023-06-09 00:41:43 +03:00
801025ad7b
Kernel: Big commit. Rewrite ELF loading code
...
We now load ELF files to VirtualRanges instead of using kmalloc.
We have only a fixed 1 MiB kmalloc for big allocations and this
allows loading files even when they don't fit in there.
This caused me to rewrite the whole ELF loading process since the
loaded ELF is not in memory mapped by every process.
Virtual ranges allow you to zero out the memory and to copy into
them from arbitary byte buffers.
2023-06-09 00:37:43 +03:00
59b10c4d25
Kernel: PageTableScope locks the PageTable before disabling interrupts
...
This allows replacing some PageTableScopes with PageTable::lock()
2023-06-09 00:34:41 +03:00
24993f6020
LibC: implement setenv, unsetenv, putenv
2023-06-05 22:51:02 +03:00
55ea5c5488
Kernel: add basic support for environment variables
...
exec functions will search files from PATH
2023-06-05 22:51:02 +03:00
c6b5cc1e07
Kernel: exec now has better posix errors
2023-06-05 21:12:08 +03:00
896b919c9d
Kernel/LibC: pass environ pointer to process
2023-06-05 21:12:08 +03:00
cf88142856
Kernel: TTY now supports CSI s and u
...
These are commonly supported values to save and load cursor
position
2023-06-05 18:19:13 +03:00
d1ad38c8d4
Kernel/LibC: add SYS_STAT and stat(), lstat()
2023-06-05 14:37:14 +03:00
9fbb2b9369
Kernel: Add SYS_WAIT
...
This syscall waits for a given pid.
2023-06-04 18:00:52 +03:00
5bf7ca1c80
Kernel: Allocators are now stored in UniqPtr
...
This allows proper memory management, we had some memory leak
2023-06-04 01:25:57 +03:00
1b1f22c35e
Kernel: make load_elf() its own function
2023-06-04 01:24:11 +03:00
479817231a
Kernel: PhysicalRange maps its nodes to kernel vaddr space
...
This keeps the lower half of address space cleaner
2023-06-04 01:20:47 +03:00
b403155ca9
Kernel: You can specify first vaddr for getting free pages
2023-06-04 01:15:48 +03:00
5f339d585c
Kernel: PAGE_FLAG_MASK is now only 0xF
...
We don't care currenly about anything but the last few bits
2023-06-03 20:08:13 +03:00
b168462b43
Kernel: PageTable now has debug_dump
...
This dumps all the mapped pages and their flags
2023-06-03 20:08:13 +03:00
9228df0f23
Kernel: Inode/Device detection is done with overridden bool functions
2023-06-03 13:28:15 +03:00
813d0f1b5f
Kernel: add basic disk cache
...
ATADevices now add disk cache to themselves
2023-06-03 02:23:14 +03:00
2b901abfb1
Kernel: Shell 'memory' now prints heap memory usage
2023-06-03 02:22:18 +03:00
7bbdee6cc4
Kernel: Symlinks are now working
...
We still have to implement loop or depth detection
2023-06-02 11:43:46 +03:00
835d32814d
Kernel: add basic support for symlinks
2023-06-01 00:24:45 +03:00
b48b239882
Kernel: Implement Process::exec()
2023-05-31 20:56:29 +03:00
5fb69300ca
Kernel: Move userspace entry functions to Process instead of Thread
2023-05-31 19:31:10 +03:00
67886b0c5a
Kernel: Move V2P and P2V to Memory/Types.h
2023-05-30 23:57:03 +03:00
81cf389754
Kernel: Booting with higher half kernel gets to Heap initialization
2023-05-30 22:21:12 +03:00
5bb1f2a48c
Kernel: Rename MMU to PageTable
...
This is more descriptive name for what it actually represents
2023-05-29 21:06:09 +03:00
fb17af4844
Kernel/LibC: opening standard files is done in libc
2023-05-29 20:21:19 +03:00
ff83f967d8
Kernel: Make RecursiveSpinLock thread safe
...
also SpinLock is now implemented with gcc builtins
2023-05-29 19:38:09 +03:00
09666adc53
Kernel: fork() now copies allocations through FixedWidthAllocator
2023-05-28 21:34:35 +03:00
ec73db0057
Kernel: Move page macros to Types.h
2023-05-28 21:03:08 +03:00
833642d405
Kernel: ISR will now crash userspace process instead of panicing kernel
2023-05-28 20:53:10 +03:00
f04399c3a0
Kernel: fork() now copies allocation done through GeneralAllocator
2023-05-28 20:37:39 +03:00
f2d767b799
Kernel: Add bareboness fork() function
2023-05-28 18:08:49 +03:00
3e93dae53c
Kernel: Add invalidate() to MMU
2023-05-28 18:05:49 +03:00
b021d3eebd
Kernel: Processes and Threads use VirtualRange memory allocations
2023-05-28 17:48:34 +03:00
15842db83e
Kernel: Move PhysicalRange to its own file and add VirtualRange
2023-05-28 17:48:34 +03:00
869de7283f
Kernel: MMU::get() is now MMU::kernel
...
MMU is can now be locked with RecursiveSpinLock.
Scheduler now has get_current_tid() that works before the Scheduler
is initialized. This allows RecursiveSpinLock usage early on.
2023-05-28 16:18:18 +03:00
faf14b880e
LibC: Rewrite all the headers.
...
We now have more or less posix issue 2018 conforming libc headers.
This was a really time consuming and boring operation but it had to
be done.
Now we get to actually start implementing libc :)
2023-05-26 22:31:21 +03:00
1658e925f2
Kernel: Add bareboness possibility to set termios
2023-05-26 22:31:21 +03:00
80d9f6131b
Kernel/LibC: move file offset back to kernel
...
This makes keeping track of offsets easier and more proper
2023-05-26 22:31:21 +03:00
e0a72defa2
Kernel: Add argc and argv to process entry
2023-05-16 00:27:49 +03:00
e0a7e242f8
Kernel: Add MMUScope
...
This disables interrupts and loads specified mmu for the
scope it lives in
2023-05-16 00:26:39 +03:00
6acb86c14b
Kernel: MMU keeps track of the current
2023-05-16 00:26:39 +03:00
729ff267d7
LibC: add function declarations to sys/stat.h
2023-05-11 15:11:33 +03:00
ff2e2937a5
Kernel: Remove offset from OpenFileDescriptor
...
This is now handled on the libc side. There might be reasons to
have it in kernel side, but for simplicity's sake I'm moving it
to libc for now :)
2023-05-09 20:31:22 +03:00
512be884ed
Kernel: Add barebones GeneralAllocator for >4096B
2023-05-08 22:10:49 +03:00
f1667b398a
Kernel: FixedWidthAllocator operates on MMU
...
Instead of Process* we use MMU& in FixedWidthAllocator since it is
everything it actually needs :)
2023-05-08 00:06:56 +03:00
b0ec0f1a1a
Kernel: We add FixedWidthAllocators on demand
...
On SYS_ALLOC we will add a new FixedWidthAllocator if the old ones
are already full or we don't have one with proper size. This allows
arbitary number of allocations as long as you have enough memory
available :)
Next I will be writing a general allocator for allocations larger
than 4096 bytes which should make SYS_ALLOC syscall complete :)
2023-05-07 23:57:01 +03:00
12e42f40c5
Kernel/LibC: add free function for FixedWidthAllocator
...
I have to rework the syscall API and allocators in process. For
now this works well enough :)
2023-05-07 01:21:50 +03:00
bcfd838131
Kernel: Add basic fixed width allocator for userspace
...
We have to move process stacks to the general heap and maybe map
kernel to higher half.
2023-05-06 19:58:08 +03:00
9c07add00f
Kernel: Invalid physical addresses from heap are specified now by 0
2023-05-06 17:34:22 +03:00
f36b94d039
Kernel: MMU can now provide info about virtual address space
2023-05-06 17:34:22 +03:00
e7a170c89f
Kernel: 64 bit MMU now properly identity maps kernel
2023-05-05 14:19:28 +03:00
55bb0084aa
Kernel: namespace and function renames
...
MMU moved to namespace kernel
Kernel::Memory::Heap moved to just Kernel
MMU::map_{page,range} renamed to identity_map_{page,range}
Add MMU::get_page_flags
2023-04-28 14:48:38 +03:00
dc0f8b383f
Kernel: Usespace threads now have an interrupt stack
2023-04-25 14:49:18 +03:00
f1a0625b61
Kernel: TSS stack can be set after initialization
2023-04-25 14:48:12 +03:00
02b961fd7e
Kernel: Stack pointer out of bounds now panics with a message
2023-04-25 13:40:55 +03:00
cd74b2167d
LibC: Write mostly functioning stdio
2023-04-23 14:32:37 +03:00
792fad2a03
Kernel: d{print,warn,error}ln(...) now has a spinlock
2023-04-22 17:58:51 +03:00
cc04990ce3
Kernel: Process now frees up its pages on destruction
2023-04-22 16:54:46 +03:00
7530482cc2
Kernel: Cleanup process creation for userspace
2023-04-22 16:51:50 +03:00
fadce063a7
Kernel: Usespace programs are now ran through ELF files
...
only 64 bit elf files are supported for now.
2023-04-22 15:35:32 +03:00
9c506ef85b
Kernel: Stack pointer is validated when updated
...
This allows us not to fail stack pointer when in syscall since
interrupts use their own stack
2023-04-21 10:40:24 +03:00
b1c7af38d0
Kernel: Add barebones per process virtual addresses
...
We now assign every (userspace) process its own MMU which we load
in scheduler. This allows every process to have separate virtual
address space.
This is very hackish implementations but it works for now
2023-04-20 00:45:41 +03:00
ea0c9b639f
Kernel: Add some bareboness functionality to map virtual addresses
2023-04-19 23:51:36 +03:00
0030f035be
Kernel: Rename MMU::{un,}allocate... to MMU::{un,}map
...
This is more appropriate name for the behaviour :D
2023-04-19 21:50:30 +03:00
e8a0df54b1
Kernel: ATAController will fail to initialize in native mode
2023-04-19 17:29:36 +03:00
33393335c8
Kernel: PCI devices now report their prog_if
2023-04-19 16:43:05 +03:00
a9a15ea2c0
Kernel: init2 is now launched as a process instead of thread
...
Also only process can now add threads to scheduler. Nobody should
have raw access to scheduler and everything should be through
Process::current() or irqs (reschedules)
2023-04-19 00:39:06 +03:00
d63716db96
Kernel: Process is not reference counted any more
...
This was not necessary and it made things needlessly complicated
2023-04-19 00:34:18 +03:00
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
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
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
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
bf0c7b9ae8
Kernel: Heap implementation can now give free pages from all of RAM
2023-04-18 10:18:15 +03:00
633929629c
Kernel: Start working on heap
2023-04-18 10:18:15 +03:00
fdb4eb6042
Kernel: Move kmalloc and MMU to Memory directory
2023-04-18 10:18:15 +03:00
8ee63f8264
Kernel: We can create basic userspace processes
...
These are still allocated on the kernel memory
2023-04-12 17:52:36 +03:00
34358b8471
Kernel: Scheduler can now terminate processes threads
2023-04-12 17:49:04 +03:00
3201c3654e
Kernel: Threads now use only 4 KiB stack :)
2023-04-12 00:22:08 +03:00
5810a77cbf
Kernel: Mark Scheduler::start() as noreturn as appropriate
2023-04-11 23:33:20 +03:00
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
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
f924ac9265
Kernel: Threads can now be terminated mid execution
2023-04-10 21:07:25 +03:00
f281543255
Kernel: Add tty to process and make termios modifiable
2023-04-05 02:53:28 +03:00
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
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
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
783842bac2
Kernel: add virtual write function to inode
2023-04-03 20:29:07 +03:00
ee1f3623ce
Kernel: Fix typo
2023-04-03 19:56:55 +03:00
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
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
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
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
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
a60f8098ee
Kernel: Fix traversing back from mount points
2023-04-01 01:54:35 +03:00
8b5d8d9f8a
Kernel: Process gets absolute paths for mount
2023-04-01 00:30:11 +03:00
db65cfeb8a
Kernel: Cleanup ATA device initialization
2023-03-31 00:58:57 +03:00
a3ba6da6f3
Kernel: Move DeviceManager to its own file
2023-03-30 22:39:45 +03:00
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
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
c2e3b422cc
Kernel: Add Semaphore to block threads
2023-03-30 18:46:33 +03:00
d4c03d3939
Kernel: root partition is now passed from the commandline
2023-03-30 18:46:19 +03:00
8e68d2e3ea
Kernel: Shell can now mount partitions
2023-03-30 15:06:41 +03:00
30c33b55e3
Kernel: Inode::Mode is now a struct so we can have functions in it
2023-03-30 14:41:15 +03:00
e2791e5260
Kernel: StorageDevices and Controllers are now devices
2023-03-30 14:22:15 +03:00
88a8bd659d
Kernel: Add IFBLK, IFLNK, IFSOCK to Inode::Mode
2023-03-30 13:15:46 +03:00
f9cc114907
Kernel: All devices have atime, mtime, ctime at their creation
2023-03-30 13:15:46 +03:00
9a4d603a62
Kernel: Remove the mount test from VFS
2023-03-30 11:43:24 +03:00
78ea4b2207
Kernel: fix stat command and device numbers
2023-03-30 10:43:08 +03:00
ab3cdea548
Kernel: Rewrite mounting code
2023-03-29 21:34:48 +03:00
dd84a2175f
Kernel: Move Partition out of StorageDevice and rename functions
2023-03-29 13:23:01 +03:00
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
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
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
c7286396d8
Kernel: Move ACPI to its own file
2023-03-27 17:30:45 +03:00
666051fd34
Kernel/BAN: move unix time conversion to BAN and add stat to Shell
2023-03-27 00:49:58 +03:00
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
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
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
5fd26b4ea8
Kernel: Lock process functions instead of the ata controller
...
Process has to use locks at least on some functions so multithreaded
disk io is safe. This seemed to fix corrupted reads from disk
2023-03-24 01:17:39 +02:00
e5eab8bae4
Kernel: Ext2FS now does allocations better
...
We only have to allocate at the beginning of the all functions and
can properly exit before any disk reads if we run out of memory.
This makes development little bit 'harder' since the {read,write}_block
user must allocate a buffer of atleast block_size bytes.
I also made disk access to cause kernel panic on error since the error
handling during file write is something I don't want to think now.
The filesystem can easily corrupt so, I feel like when disk io starts
to fail I'll come back to this.
2023-03-23 23:22:31 +02:00
75c4f35e85
Kernel: Add possibiliity to create empty files on Ext2
...
Big rewrite for Ext2 for more easy and optimized code
2023-03-23 22:26:06 +02:00
633414bd20
Kernel: Remove block group descriptor cache from ext2fs
...
This will make improving the fs easier since we need to only update
the values on the disk
2023-03-23 18:52:58 +02:00
7ca6cd61be
Kernel: Move get_unix_time to RTC namespace
2023-03-23 18:14:51 +02:00
3ef72e8a7b
BAN: Modify Span constructors to keep constness correctly
2023-03-23 14:26:03 +02:00
9b56801c3d
Kernel: StorageDevice and Ext2 "support" writing
2023-03-23 13:04:13 +02:00
74949401bd
Kernel: Cleanup GPT parsing code
2023-03-23 11:13:14 +02:00
072954480d
Kernel: Remove obsolete Ext2FS::ext2_root_inode()
...
This was not used by anyone and the cast was wrong anyway
2023-03-21 18:19:48 +02:00
3652d11059
Kernel: Remove for_each_block from Ext2
2023-03-21 18:14:02 +02:00
f9ae1f0023
Kernel: Fix PC Screen font parsing
...
I had misread the format and the parsing code was incorrect. I also
changed fonts to store unicode codepoints as 32 bit integers, so
every character can be represented
2023-03-20 14:52:42 +02:00
896b4c280c
Kernel: Font parsing uses Spans now
2023-03-20 13:35:54 +02:00
e4bcd98904
Kernel: Add basic mounting to VFS.
2023-03-19 05:51:25 +02:00
3570764448
Kernel: Add comparison operator for inodes
2023-03-19 03:34:23 +02:00
8236598f9d
Kernel: Optimize Ext2 disk reads
...
We used to read whole file until we reached the asked offset.
Now we can calculate the appropriate block and read just the asked data.
2023-03-18 03:47:59 +02:00
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
1f2ceeb329
Kernel: VFS caches currently open inodes
2023-03-16 15:31:33 +02:00
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
8b8e3cbbf0
Kernel/Userspace: Start initial work on userspace and syscalls
2023-03-13 15:32:46 +02:00
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
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
371dfe8ef3
BAN: Formatter now uses perfect forwarding on its arguments
2023-03-08 21:31:26 +02:00
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
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
a068d828fe
Kernel: ATA reads go through the ata controller and not only device
2023-03-08 03:26:25 +02:00
1dabe7a222
Kernel: More rework on Scheduler
2023-03-08 03:26:25 +02:00
e7a577f54a
Kernel: fix includes
2023-03-08 03:26:25 +02:00
23b3028e15
Kernel: Rename RefCounted -> RefPtr and implement RefCounted
2023-03-08 03:26:25 +02:00
f7ebda3bf1
Kernel: Move interrupt related functions to InterruptController
2023-03-08 03:16:51 +02:00
b8ee77eb78
Kernel: Initial work on new scheduler with queues
...
Sleeping is definately broken
2023-03-08 02:41:44 +02:00
a9acf1f6dc
Kernel: PCIDevice is now class with getters and constructor
2023-03-08 02:41:44 +02:00
1dd61e93b6
Kernel: Threads cannot take arguments anymore
2023-03-02 01:56:09 +02:00
7fcbb869e1
Kernel: Initialize GDT in kernel code
...
We dont use the boot GDT only while booting
2023-03-01 21:21:56 +02:00
ba8c4dbc7f
Kernel: panic now disables interrupts as the first thing
2023-03-01 21:21:56 +02:00
9756de02ef
Kernel: MMU now takes flags when allocating pages
2023-03-01 21:21:56 +02:00
7d84f290a1
Kernel: Add lock to Disk reads before I forget
2023-02-26 03:48:11 +02:00
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
04bb08d27f
Kernel: Add basic PCI enumeration
2023-02-26 02:56:53 +02:00
34f9912a1d
Kernel: Add IO functions inl, outl, and ins{b,w,l} to read into buffer
2023-02-24 12:39:38 +02:00
390a747768
Kernel: Add prefs font for terminal output before file system
2023-02-23 01:22:50 +02:00
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
0e668738dc
Kernel: Make some basic bitmap font parsing code
2023-02-22 22:28:12 +02:00
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
5d31e89574
Kernel: Update ErrorOr API and add path find to VFS
...
These two are done on the same commit since Changes to Shell were
annoying to make work with only one change
2023-02-22 01:23:11 +02:00
038379274e
Kernel: Inode can now return full mode value
...
Kernel::Inode::Mode is an union of bitmasked fields for every
possible bit
2023-02-20 21:39:24 +02:00
efaca469ee
Kernel: Ext2Inode now supports indirect blocks through for_each_block()
2023-02-20 10:25:15 +02:00
80006ea137
Kernel: Initial work on filesystem
...
We support now ext2 directory listing. File reading is not yet supported.
2023-02-20 01:46:00 +02:00
247f03c79e
BAN: Make ErrorOr<> have attribute [[nodiscard]]
...
We don't have to specify it everytime we make function return ErrorOr
2023-02-19 20:10:30 +02:00
feaeee11e5
Kernel: fix ARCH() macro and add helper macros for push/pop
2023-02-19 18:52:25 +02:00
1bd8b0fe5c
Kernel: Sleep now actually sleeps and allows idling
2023-02-19 18:52:25 +02:00
8f1b6da2af
Kernel: Use Vector instead of raw poiters in Disk stuff
...
We now don't have to manually free allocated data
2023-02-16 20:48:41 +02:00
460fc3a29f
Kernel: Start working on filesystem
...
We have a basic PATA driver (for reading) and gpt parser.
2023-02-16 20:00:31 +02:00
94cbacc998
Kernel: PIT now has very barebones sleep
2023-02-16 17:53:25 +02:00
6a133782ed
All: Move to c++20
2023-02-09 23:05:26 +02:00
fb7fe73d49
Kernel: Add inw and outw to IO
2023-02-04 23:37:34 +02:00
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
777ede328e
Kernel: Add helper functions for reading current rsp and rbp
2023-02-02 23:19:44 +02:00
117d1de038
Kernel: panic does not need to include <kernel/kprint.h>
...
This allows us to not have kprint available literally everywhere
2023-02-02 15:51:15 +02:00
f6b05212e0
Kernel: Add is_locked() to spinlock
...
I think this is atomic read
2023-02-02 15:49:30 +02:00
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
6a9d60a8fb
Kernel: Implement somewhat functioning multithread support
...
This still uses only a single cpu, but we can now have 'parallelization'
This seems to work fine in qemu and bochs, but my own computer did not
like this when I last tried.
I have absolutely no idea how multithreading should actually be
implmemented and I just thought and implemented the most simple one I
could think of. This might not be in any way correct :D
2023-02-01 01:53:35 +02:00
7d8aafa0b5
Kernel: Add macros for current archutecture
2023-02-01 01:52:52 +02:00
337569b0ca
Kernel: Implement basic SpinLock
2023-02-01 01:52:52 +02:00
1687028ed5
Kernel: Add constructor and destructor to MMU
2023-01-30 18:54:04 +02:00
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
aa0757e135
Kernel: Move dump_stacktrace from panic -> debug
2023-01-26 02:57:14 +02:00
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
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
ba53582f23
Kernel: Rewrite APIC and PIC more OOP friendly
...
x86_64 port is slowly coming together
2023-01-23 20:13:57 +02:00
b50bb03ed4
Kernel: Panic now halts machine even if we get spurious irqs
2023-01-23 18:25:48 +02:00
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
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
491610db2c
Kernel: move GDT initialization to boot.S
2023-01-22 00:48:12 +02:00
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
b9a4530e54
Kernel: Kernel::Panic now dumps stacktrace to com1
2023-01-16 21:50:50 +02:00
7540fa0385
Kernel: Shell now 'properly' parses commandline
2023-01-16 20:09:22 +02:00
e307db47eb
Kernel: Kernel::Panic() will now always print to serial output
2023-01-16 15:44:27 +02:00
46e5b3f3d6
Kernel: Move GDT to its own namespace and cleanup
2023-01-16 15:24:10 +02:00
8881c1e117
Kernel: Shell is no longer singleton
2023-01-16 15:16:39 +02:00
1545850be3
Kernel: Input callbacks use the new BAN::Function
2023-01-16 15:15:02 +02:00
d5e162b1ea
Kernel: fix kmalloc header
2023-01-16 12:10:50 +02:00
f547a788f2
Kernel: Add support for arrow keys in Shell
2023-01-13 15:07:24 +02:00
416a41745f
Kernel: Kernel::Panic now checks that TTY is initialized instead of VESA
2023-01-13 15:04:06 +02:00
7f01eaa936
Kernel: Move CPUID feature strings to cpp file
2023-01-13 00:03:37 +02:00
301ad89783
Kernel: Unallocate RSDT after we are done with it
2023-01-12 13:45:01 +02:00
33a4fcc662
Kernel: Add helper macro for bochs magic break point
2023-01-12 13:24:41 +02:00
8fd51fb47d
Kernel: Replace Paging{.h,.cpp} with better MMU{.h,.cpp}
2023-01-12 13:24:36 +02:00
64c57ea3d0
Kernel: Remove obsole CPUID::IsAvailable
...
This is now a harware requirement that is verified already in boot.S
2023-01-10 21:28:59 +02:00
7d45b3cbd6
Kernel: Rewrote kmalloc to be much simpler and allow alignment
2023-01-10 21:10:36 +02:00
d89b6aa9ce
Kernel: Serial output now gives clickable links
2023-01-10 21:09:59 +02:00
85068e27d6
BAN: BAN/Memory.h now provides the operator new and delete
2023-01-10 17:51:33 +02:00
c6467b8ebc
Kernel: Multiboot data and kernel command lines are now global variables
2023-01-10 17:50:24 +02:00
5106552bfd
Kernel: Serial output uses now "\r\n" as line endings
2023-01-10 11:24:30 +02:00
Bananymous