96d6453ea8
Kernel: PageTableScope locks the PageTable before disabling interrupts
...
This allows replacing some PageTableScopes with PageTable::lock()
2023-06-09 00:34:41 +03:00
2b9900e56e
Kernel: get_free_contiguous_pages works with non-page aligned addresses
...
also fix bug in ordering
2023-06-06 02:03:23 +03:00
86f58f60cb
LibC: implement setenv, unsetenv, putenv
2023-06-05 22:51:02 +03:00
064ce568c2
Kernel: add basic support for environment variables
...
exec functions will search files from PATH
2023-06-05 22:51:02 +03:00
0b1b4d8f7e
Kernel: exec now has better posix errors
2023-06-05 21:12:08 +03:00
b0e9ab0519
Kernel/LibC: pass environ pointer to process
2023-06-05 21:12:08 +03:00
668517a723
Kernel: TTY now actually flushes on ^D
2023-06-05 20:21:46 +03:00
649f08ec78
Kernel: verify that loaded elfs are executable
2023-06-05 19:29:32 +03:00
5425394880
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
9d64dbd5c2
Kernel/LibC: add SYS_STAT and stat(), lstat()
2023-06-05 14:37:14 +03:00
b68d5a5833
Kernel: Add SYS_WAIT
...
This syscall waits for a given pid.
2023-06-04 18:00:52 +03:00
94d2090777
Kernel: fork() now clones current thread
...
This is how posix specifies thread cloning during fork
2023-06-04 17:40:37 +03:00
e97585daf9
Kernel: Process FixedWidthAllocators come now in 4 sizes
2023-06-04 01:26:43 +03:00
924fc2118c
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
51f4c0c750
Kernel: make load_elf() its own function
2023-06-04 01:24:11 +03:00
37b93da650
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
35e739dcdd
Kernel: reorder process exit steps
2023-06-04 01:19:04 +03:00
8352392b38
Kernel: You can specify first vaddr for getting free pages
2023-06-04 01:15:48 +03:00
dc1aff58ed
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
9f75d9cfe5
Kernel: PageTable now has debug_dump
...
This dumps all the mapped pages and their flags
2023-06-03 20:08:13 +03:00
a42af7e973
Kernel: boot.S is back to 2 MiB pages
...
bochs doesn't seem to support 1 GiB pages
2023-06-03 18:53:36 +03:00
a4cb5d8360
Kernel: Inode/Device detection is done with overridden bool functions
2023-06-03 13:28:15 +03:00
da7f09cf82
Kernel: Heap will return 0 if no free page is available
2023-06-03 02:55:31 +03:00
0166af472b
Kernel: DiskCache will try to shrink_to_fit after cache cleanup
2023-06-03 02:55:22 +03:00
884d986bd6
Kernel: DiskCache won't crash when running out of kmalloc memory
2023-06-03 02:36:20 +03:00
59b807189f
Kernel: add basic disk cache
...
ATADevices now add disk cache to themselves
2023-06-03 02:23:14 +03:00
fb1c7015b1
Kernel: Shell 'memory' now prints heap memory usage
2023-06-03 02:22:18 +03:00
9bd4d68f9c
Kernel: Shell ls and stat now properly show symlinks
2023-06-02 18:22:56 +03:00
633cb4f282
Kernel: VFS now has max link depth of 100
2023-06-02 12:50:40 +03:00
4d4d0e26a9
Kernel: Symlinks are now working
...
We still have to implement loop or depth detection
2023-06-02 11:43:46 +03:00
0ffd2a5c1d
Kernel: Shell can now list symlinks
2023-06-01 00:25:53 +03:00
232fdcb82c
Kernel: add basic support for symlinks
2023-06-01 00:24:45 +03:00
0ccc23d544
Kernel: Shell opens standard files
2023-05-31 23:14:15 +03:00
02f0239016
Kernel: Cleanup exec code
2023-05-31 22:36:05 +03:00
ab61b49aca
Kernel: Add SYS_EXEC syscall
2023-05-31 20:57:33 +03:00
4da1d6fd27
Kernel: Implement Process::exec()
2023-05-31 20:56:29 +03:00
909e847369
Kernel: Move userspace entry functions to Process instead of Thread
2023-05-31 19:31:10 +03:00
eafa09fecf
Kernel: boot.S maps GiB as single pdpte
2023-05-31 00:51:15 +03:00
8175348284
Kernel: Fix comment
2023-05-31 00:51:15 +03:00
b2832cb47a
Kernel: PageTable destructor works now
...
we are successfully booting higher half kernel now :)
2023-05-31 00:44:14 +03:00
9f499991c8
Kernel: PageTable::create_userspace() now works
2023-05-31 00:44:14 +03:00
9a416e8ae8
Kernel: kmalloc free error prints the pointer
2023-05-31 00:34:56 +03:00
911922c6a3
Kernel: RSDP location is now done with virtual addresses
2023-05-31 00:34:21 +03:00
1f2fd59ad5
Kernel: Physical range now calculates RAM with physical addresses
2023-05-31 00:33:44 +03:00
708d401d2c
Kernel: Heap gets multiboot pointer with P2V
2023-05-30 23:57:44 +03:00
ed0dcacab3
Kernel: Move V2P and P2V to Memory/Types.h
2023-05-30 23:57:03 +03:00
e86050f343
Kernel: PageTable::map_range_at maps correctly the last page
2023-05-30 23:56:07 +03:00
57f7da6ce1
Kernel: Booting with higher half kernel gets to Heap initialization
2023-05-30 22:21:12 +03:00
93e6455171
Kernel: start work on higher half kernel
2023-05-30 08:00:17 +03:00
265fe9c62e
Kernel: We now identity map full GiB in boot.S
...
The paging structure is pre-built so no unnecessary calculations are done
2023-05-30 00:08:52 +03:00
3b9d60d7cb
Kernel: Remove unused includes of CriticalScope
2023-05-29 21:15:55 +03:00
278b873e89
Kernel: Remove unnecessary usages of PageTableScope
...
This should be used as few times as possible since it calls 'cli'
2023-05-29 21:11:29 +03:00
e640344d7a
Kernel: Rename MMU to PageTable
...
This is more descriptive name for what it actually represents
2023-05-29 21:06:09 +03:00
7151bb86a8
Kernel/LibC: opening standard files is done in libc
2023-05-29 20:21:19 +03:00
3d95cf02f3
Kernel: We can't lock the MMU lock in load()
...
It needs to be callable always by scheduler
2023-05-29 19:39:35 +03:00
dd3f34cb2c
Kernel: Make RecursiveSpinLock thread safe
...
also SpinLock is now implemented with gcc builtins
2023-05-29 19:38:09 +03:00
0c316ebfb2
Kernel: Add SYS_SLEEP
2023-05-28 22:34:48 +03:00
282bf24f65
Kernel: fork() now copies allocations through FixedWidthAllocator
2023-05-28 21:34:35 +03:00
f964f6be8d
Kernel: Move page macros to Types.h
2023-05-28 21:03:08 +03:00
0202ccec5f
Kernel: ISR will now crash userspace process instead of panicing kernel
2023-05-28 20:53:10 +03:00
636c308993
Kernel: fork() now copies allocation done through GeneralAllocator
2023-05-28 20:37:39 +03:00
6fdbe6f9c2
Kernel: Add bareboness fork() function
2023-05-28 18:08:49 +03:00
c19f4c019a
Kernel: Add invalidate() to MMU
2023-05-28 18:05:49 +03:00
83eb3dc0cb
Kernel: fix MMU::map_page_at()
...
We used to only reassign if flags changed
2023-05-28 17:57:05 +03:00
0129619d9a
Kernel: Processes and Threads use VirtualRange memory allocations
2023-05-28 17:48:34 +03:00
e0479b291d
Kernel: Move PhysicalRange to its own file and add VirtualRange
2023-05-28 17:48:34 +03:00
b847d7dfd5
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
fed690a7f2
Kernel: Directory listing is working again
2023-05-26 22:31:21 +03:00
54d981120d
Kernel: kmalloc debug_dump is marked [[maybe_unused]]
2023-05-26 22:31:21 +03:00
f79250c4d4
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
0ab3332ad3
Userspace: Start work on shell
2023-05-26 22:31:21 +03:00
9e0abbc2f0
Kernel: Add bareboness possibility to set termios
2023-05-26 22:31:21 +03:00
4a4a3bf184
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
f33e78882e
Kernel: Add argc and argv to process entry
2023-05-16 00:27:49 +03:00
0ff067bdb7
Kernel: Add MMUScope
...
This disables interrupts and loads specified mmu for the
scope it lives in
2023-05-16 00:26:39 +03:00
31ac3260ed
Kernel: MMU keeps track of the current
2023-05-16 00:26:39 +03:00
85039020d3
Kernel: argc is passed as zero to userspace
2023-05-11 18:28:32 +03:00
7eb43990ad
BuildSystem: userspace has cmake target
2023-05-11 16:19:53 +03:00
53f4b5a9da
LibC: add function declarations to sys/stat.h
2023-05-11 15:11:33 +03:00
1cf7ef3de6
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
812e61ca70
Kernel: Add barebones GeneralAllocator for >4096B
2023-05-08 22:10:49 +03:00
2d0a5a9e15
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
f32d594879
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
2fe9af7165
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
0deda83d05
BuildSystem: linker -O2 doesn't do anything? hopefully
2023-05-06 19:58:08 +03:00
ff5bcd4416
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
b65cd1d09b
Kernel: Invalid physical addresses from heap are specified now by 0
2023-05-06 17:34:22 +03:00
bc35a561d3
Kernel: GDT tss selector is now 16 bit value
2023-05-06 17:34:22 +03:00
06bc807e34
Kernel: MMU can now provide info about virtual address space
2023-05-06 17:34:22 +03:00
6262e41de1
Kernel: ISRs now print pid and tid
2023-05-06 00:10:15 +03:00
0cb53efa01
Kernel: 64 bit MMU now properly identity maps kernel
2023-05-05 14:19:28 +03:00
4e859bedbc
Kernel: TTY input process is now single instance
...
Process sends key events to the active (currently only) tty
2023-04-30 16:11:14 +03:00
f139fc2229
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
e48acbb03b
Kernel: Add set_tss_stack() to 32 bit
2023-04-28 14:44:23 +03:00
d1155c968e
Kernel: dprintln file name is now relative
...
This makes file names much shorter
2023-04-28 14:43:19 +03:00
46dcf98fc1
Kernel: Scheduler updates tss stack on thread execution
2023-04-25 14:49:50 +03:00
58ce907327
Kernel: Usespace threads now have an interrupt stack
2023-04-25 14:49:18 +03:00
6ecc8cac0e
Kernel: TSS stack can be set after initialization
2023-04-25 14:48:12 +03:00
bd95f17426
Kernel: Stack pointer out of bounds now panics with a message
2023-04-25 13:40:55 +03:00
175f07cd2f
Kernel: Fix bug in Process::create_userspace()
...
We used to write more than we needed to. This could lead to unwanted
page faults
2023-04-25 13:21:28 +03:00
77c83e5552
Kernel: Fix possible dead lock in Process::read()
2023-04-23 14:46:18 +03:00
b15deb420f
LibC: Write mostly functioning stdio
2023-04-23 14:32:37 +03:00
b38989d594
Kernel: Add ASSERTion to Process::exit()
...
This is just so I don't forget that exit can currently only
be called on the executing thread itself
2023-04-22 19:05:27 +03:00
79e6de325f
Kernel: Process can now load 32 bit elf files on i386
...
We are page faulting on process exit but I'm investigating
the reason.
2023-04-22 19:03:30 +03:00
4f8f3ddc29
Kernel: Fix 32 bit MMU
2023-04-22 18:22:39 +03:00
82a1a29260
Kernel: More proper paging in Elf loading
2023-04-22 18:17:44 +03:00
8a5608df91
Kernel: d{print,warn,error}ln(...) now has a spinlock
2023-04-22 17:58:51 +03:00
3f1c0ec91b
Kernel: Process now frees up its pages on destruction
2023-04-22 16:54:46 +03:00
1406a75a92
Kernel: Cleanup process creation for userspace
2023-04-22 16:51:50 +03:00
8001493df3
Kernel: Fix some deadlocks in the Process
2023-04-22 16:19:57 +03:00
8c1f5bfe1e
Kernel: Remove obsolete userspace stuff from kernel
2023-04-22 15:38:45 +03:00
ec8b9640e2
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
d9068eebb5
Kernel: kmalloc does not dump stack trace
...
dump_stack_trace() page faults and i dont feel like debugging this
now :)
2023-04-21 13:45:13 +03:00
3ad0d2328d
Kernel: Don't call 'cli' on interrupt
...
This is automatically done because we are using interrupt gates
in the IDT
2023-04-21 11:18:08 +03:00
3f2beb4547
Kernel: Fix syscall return value in 32 bit
2023-04-21 11:08:02 +03:00
be14a6c239
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
3aa0eeb4a3
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
b3eeb6412f
Kernel: Add some bareboness functionality to map virtual addresses
2023-04-19 23:51:36 +03:00
d38470c8e2
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
a159c980ee
Kernel: kmalloc will always print debug on failed alloc
2023-04-19 18:05:01 +03:00
4475e3e184
Kernel: ATAController will fail to initialize in native mode
2023-04-19 17:29:36 +03:00
cf0320e47d
Kernel: PCI devices now report their prog_if
2023-04-19 16:43:05 +03:00
cd03a95128
Kernel: Shell fix file reading
...
We were reading 8 bytes at a time instead of the 1024 we were
supposed to :DD
2023-04-19 14:09:23 +03:00
51e299c7e3
Kernel: Shell now has exit() command
2023-04-19 12:53:09 +03:00
6f65453fd4
Kernel: Fix Process::exit() and where it is called from
...
cksum doesn't seem to work anymore on big files. I have to look
into this. It locks up after couple of seconds...
2023-04-19 12:52:21 +03:00
d74ce4950c
Kernel: We now launch Shell again on boot
...
Adding this just before push :D
2023-04-19 00:41:24 +03:00
59a682c720
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
7bd4593748
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
5494e2c125
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
aba82564f5
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
93abee9c7c
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
821d065eba
Kernel: Handle some Heap edge cases
2023-04-18 10:18:15 +03:00
2614437ba0
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
1aac3a0425
Kernel: Heap implementation can now give free pages from all of RAM
2023-04-18 10:18:15 +03:00
a4568f9263
Kernel: Remove unused file
2023-04-18 10:18:15 +03:00
a180e72b6f
Kernel: Start working on heap
2023-04-18 10:18:15 +03:00
2de64b592d
Kernel: Kmalloc now has its memory statically allocated
...
We don't use the memory map given by bootloader since this automatically
maps the memory to a available space.
2023-04-18 10:18:15 +03:00
9c0f3dd996
Kernel: Move kmalloc and MMU to Memory directory
2023-04-18 10:18:15 +03:00
079df39ca8
LibELF: Start implementing elf library
2023-04-18 10:18:15 +03:00
fe87c08a02
LibC: add needed stubs to build executables with our compiler
2023-04-12 17:53:02 +03:00
8637959289
Kernel: We can create basic userspace processes
...
These are still allocated on the kernel memory
2023-04-12 17:52:36 +03:00
6be53668b9
Kernel: Scheduler can now terminate processes threads
2023-04-12 17:49:04 +03:00
d1b7249803
Kernel: Debug::dump_stack_trace now 'detects' repeating function
2023-04-12 01:32:41 +03:00
ff7c50c627
Kernel: kmalloc does not check for corruptiong unless it cannot allocate
...
We 'don't care' if kmalloc is corrupted unless it prevents us from
allocating memory. Scheduler should be catching stack overflows either
way and is much more efficient
2023-04-12 00:24:02 +03:00
12779cdef8
Kernel: Threads now use only 4 KiB stack :)
2023-04-12 00:22:08 +03:00
f5e676b2b7
Kernel: Fix TTY spinlock usage
2023-04-12 00:20:04 +03:00
8e5e5f819f
Kernel: Shell TTY_PRINT is now function instead of macro
...
This makes functions uses way less stack
2023-04-12 00:18:58 +03:00
370a958379
BuildSystem: GCC will now complain on functions with 1 KiB stack
2023-04-12 00:18:06 +03:00
a0bd3dc54f
Kernel: kmalloc now detects corruption
...
Kmalloc checks if its nodes have corrupted. This was happening
because of stack overflow.
2023-04-11 23:36:46 +03:00
809eb2fe3e
Kernel: Mark Scheduler::start() as noreturn as appropriate
2023-04-11 23:33:20 +03:00
7010d8614f
Kernel: kernel doesn't allocate large blocks of data on stack
...
We used to allocate 1 KiB blocks on multiple places on stack. This
is a problem, since kernel stack shouldn't have to be too big
2023-04-11 23:31:58 +03:00
69f13f1896
Kernel: Scheduler will panic if it encounters stack overflow
2023-04-11 23:29:21 +03:00
bdaf7cddcb
Kernel: Process now locks the mutex while modifying open files
...
This allows processes to be actually removed from the list instead
of dead locking
2023-04-11 23:28:16 +03:00
8d6db168d6
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
2fabe1949c
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
c660df14ec
BuildSystem: Fix header copying to sysroot
...
We used to copy all headers everytime to sysroot which caused
rebuild of the whole os. Now we use the cmake command
'copy_directory_if_different' which seemed to fix this issue :)
2023-04-10 21:07:25 +03:00
e704968f96
Kernel: Threads can now be terminated mid execution
2023-04-10 21:07:25 +03:00
32359df939
Kernel: Add small wait in ATA driver before reading/writing
...
This allows bochs to boot again
2023-04-10 21:07:25 +03:00
641ed23380
Kernel: Fix framepointers on started threads
2023-04-10 21:07:25 +03:00
9f977488fa
BuildSystem: cmake can now build out libc
...
I can't seem to get libc++ build to work...
2023-04-10 21:07:25 +03:00
7752b02fb7
BuildSystem: remove now obsolete include directories from kernel build
2023-04-07 02:25:47 +03:00
f70cd3ea77
BuildSystem: Cleanup cmake code
...
The buildsystem is kind of a mess. I will be writingn build
instructions soon.
2023-04-06 20:31:10 +03:00
5db5ff069a
BuildSystem: you can now build the toolchain with cmake
2023-04-06 00:23:02 +03:00
e84f613c4d
Kernel: Shell now somewhat functions again
...
I will not be fixing the shell implementation until I get to
userspace
2023-04-05 11:37:41 +03:00
5db4e5b4d5
Kernel: Fix TTY echo and canonical flag behaviour
2023-04-05 11:35:19 +03:00
b00dd8d68d
Kernel: Fix ansi control sequence cursor movement
2023-04-05 03:07:52 +03:00
abbbf7ec15
Kernel: Add tty to process and make termios modifiable
2023-04-05 02:53:28 +03:00
d0b1457f30
Kernel: TTY now supports clearing
2023-04-05 02:04:18 +03:00
a423cd8bb3
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
db076058b9
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
a1100624bf
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
28e1497f88
Kernel: add virtual write function to inode
2023-04-03 20:29:07 +03:00
8d6111641e
Kernel: Fix keys in PS2Keymap
2023-04-03 20:25:23 +03:00
3ee20d1a84
Kernel: Fix typo
2023-04-03 19:56:55 +03:00
002c2d0aca
BuildSystem: remove non-existent file from kernel CMakeLists.txt
2023-04-03 19:02:25 +03:00
461a5774f8
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
ebfd092075
Kernel: Cleaner partition parsing errors
2023-04-03 09:55:49 +03:00
e322826347
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
3998c5f955
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
762d22ed28
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
f2362b2b78
Kernel: ATA controller waits now before read/write until disk is ready
...
Qemu used to freeze on disk writes but now it seems fine
2023-04-02 05:37:17 +03:00
471ac80420
BuildSystem: building for 32-bit works now
2023-04-02 05:03:17 +03:00
e49d3c7bfe
BuildSystem: We are now using cmake instead of plain make
...
I have been annoyed for a while since I had to build everything
when running the os since the buildsystem was really bad.
I wanted to rewrite the whole build system and changed to using cmake
:)
2023-04-02 04:07:27 +03:00
79090c2648
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
7a6b1c8e47
Kernel: Fix traversing back from mount points
2023-04-01 01:54:35 +03:00
8988ce2766
Kernel: Add inodes '.' and '..' to device manager
2023-04-01 01:33:04 +03:00
dcde2ae6b4
Kernel: Reads return 0 bytes read at the end of device
...
We used to not have any idea if we where already at the end of device.
Also fixed couple of copy-paste errors from read->write
2023-04-01 00:55:07 +03:00
c62849a783
Kernel: Shell cleanup cat command
2023-04-01 00:54:39 +03:00
f453e8e170
Kernel: Shell 'time' prints the time even if command fails
2023-04-01 00:30:33 +03:00
990887891e
Kernel: Process gets absolute paths for mount
2023-04-01 00:30:11 +03:00
5da801d12b
Kernel: fix ext2 failed creation memory leak
2023-04-01 00:22:03 +03:00
3a4557d417
Kernel: Cleanup ATA device initialization
2023-03-31 00:58:57 +03:00
26d9a3e253
Kernel: Move DeviceManager to its own file
2023-03-30 22:39:45 +03:00
eef3631a5a
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
88ee35165f
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
c8f05b4a7a
Kernel: Add Semaphore to block threads
2023-03-30 18:46:33 +03:00
2995a36942
Kernel: root partition is now passed from the commandline
2023-03-30 18:46:19 +03:00
3e8ab8271d
Kernel: Shell can now mount partitions
2023-03-30 15:06:41 +03:00
5b3a00c64f
Kernel: Inode::Mode is now a struct so we can have functions in it
2023-03-30 14:41:15 +03:00
0ce9fd8597
Kernel: StorageDevices and Controllers are now devices
2023-03-30 14:22:15 +03:00
Bananymous