Bananymous
598a09c13d
Kernel: Allow select to work on any type of inode
2024-05-28 16:03:54 +03:00
Bananymous
18e2559b1e
Kernel/LibC: Add SYS_TRUNCATE
2024-05-28 01:08:04 +03:00
Bananymous
a1ab44d39f
Kernel: Optimize disk reads to read multiple sectors at once
...
Old StorageDevice::read_sectors() read each sector separately if the
underlying disk had a disk cache. This patch allows multiple sectors to
be read even if the disk cache exists and contains some of the sectors.
Only sectors that could not be found from the disk cache are actually
read from the disk. This optimization is not done for writing, which
still will write each sector separately, if disk cache has no memory to
store new sectors. It would feel kind of unnecessary optimization as you
have greater problems if disk cache cannot allocate a single page.
2024-05-27 15:52:34 +03:00
Bananymous
8b1514e575
Kernel: Make all storage devices readable and writable
...
I only had a {read,write}_impl defined for ATABaseDevice. This patch
moves that implmentation to general storage device.
2024-05-27 13:41:55 +03:00
Bananymous
2d3810874d
Kernel: Fix thread signal handling
...
Threads will now only handle signals once they are not holding any
mutexes. This removes some dead locks.
2024-05-26 20:08:35 +03:00
Bananymous
2a4d986da5
Kernel: Add preliminary support for PCIe
...
Only segment 0 is supported, but devices can now be accessed through
mmio.
Adding more segments would require adding argument to every PCI API so
it is left for later.
2024-05-25 20:50:07 +03:00
Bananymous
df260fe0e8
Kernel: Process::validate_pointer_access now maps the whole range
...
This fixes a bug where userspace provided address is not fully mapped
and the kernel tries to read/write it while using PageTable fast page.
In the future userspace input should be copied on syscall entry, so
userspace could not modify the input during syscall. Currently there
is change that userspace input passes kernel syscall validation and
after that userspace could modify the input before the value is
actually used.
2024-05-24 14:14:17 +03:00
Bananymous
2be4fe8404
Kernel: Make PageTable::s_fast_page_lock non-recursive
...
This lock is only used in wrapper of PageTable. There is no possiblity
of taking the lock outside of these wrappers.
2024-05-24 14:12:35 +03:00
Bananymous
06f4b0b29a
BAN: Make String and StringView header only
...
This allows linking with libc without having to link ban
2024-05-23 15:43:26 +03:00
Bananymous
83e3409bd8
Kernel/LibC: Update SYS_SEEK to return new offset and implement lseek
2024-05-23 14:49:23 +03:00
Bananymous
0af74fccda
Kernel/LibC: Rework dirent structure
...
dirent now contains statically sized d_name. This allows using
sizeof on the name and dirent properly, which some programs seem
to be using.
2024-05-22 20:19:59 +03:00
Bananymous
e77de1804f
Kernel: Fix some race conditions in TCP stack
...
Remove race condition if two acks are to be sent one after another.
Always unblock semaphore once TCP thread has done something. This
allows better chance of TCP sending to succeed.
There are multiple places in the networking code that would require
thread-safe entering to blocking mode. I should add some API for this
so that a lot of race conditions could be removed.
2024-05-21 01:53:45 +03:00
Bananymous
e00b92225d
Kernel: Fix E1000 interrupt handling condition
...
I had written the ICR register check backwards which lead to interrupt
handling only when it was not needed, and no handling when it was
needed. This somehow still worked, just much slower often requiring tcp
resends from the server.
2024-05-21 01:52:19 +03:00
Bananymous
e7e1dd91c7
Kernel: Implement ACPI reset
2024-04-22 21:12:13 +03:00
Bananymous
195c5e92a4
Kernel: Add floating bus detection for ATA Bus
2024-04-22 21:12:13 +03:00
Bananymous
26922ebb51
Kernel: Remove stack size check for keyboard layout initialization
...
Keyboard layout loading can take around 1 KB of stack for i686 target
2024-04-22 21:11:04 +03:00
Bananymous
693f90449f
Kernel: Rework AML package and implement indexing in to packages
2024-04-19 11:26:48 +03:00
Bananymous
34b10f61ce
Kernel: Make PIT reserve its IRQ
...
PIT did not reserve IRQ leading to kernel panic if it was being
initialized.
2024-04-18 13:34:28 +03:00
Bananymous
1479b42112
Kernel: Don't even loop over processor when system has only BSP
2024-04-18 13:33:52 +03:00
Bananymous
bb061d2a0a
Kernel: Make 32bit not use large pages during boot
...
There is no guarantee that they are supported
2024-04-18 13:33:15 +03:00
Bananymous
061012a268
Kernel: Fix signal trampoline
...
32 bit did not even support it and 64 bit did not align stack
2024-04-18 13:32:40 +03:00
Bananymous
a698f91db4
Kernel: Fix PriorityMutex::try_lock()
...
Forgot to check this when I updated Mutex::try_lock()
2024-04-18 01:36:15 +03:00
Bananymous
30d12a76bc
Kernel: Fix 32 bit compilation
2024-04-18 01:35:56 +03:00
Bananymous
687fa44eff
Kernel: Add support for ACPI general purpose events
2024-04-17 21:51:03 +03:00
Bananymous
aefb33efff
Kernel: Implement dummy AML NotifyOp
2024-04-17 15:40:11 +03:00
Bananymous
da0c45b7ee
Kernel: Cleanup AML debug dump output
2024-04-17 15:35:42 +03:00
Bananymous
956335e844
Kernel: Implement AML WhileOp
2024-04-17 15:00:14 +03:00
Bananymous
701fc600cd
Kernel: Implement evaluate and store for BankFieldElement
2024-04-17 14:59:51 +03:00
Bananymous
e38b2cff4f
Kernel: Implement proper synchronization for AML opregions
2024-04-17 14:59:26 +03:00
Bananymous
b268293402
Kernel: Fix Buffer evaluate and store for sizes >= byte
...
All reads and writes were to the first byte. This patch adds the
correct offset for reading and writing.
2024-04-17 14:57:13 +03:00
Bananymous
45b9dc8be9
Kernel: Make ACPI \\_OSI return true for Linux
2024-04-17 02:19:35 +03:00
Bananymous
0ad7025a17
Kernel: Actually map FACS (and global lock)
2024-04-17 02:14:56 +03:00
Bananymous
49b7467840
Kernel: Simplify AML method invocation API
2024-04-17 01:20:58 +03:00
Bananymous
a40ef610a2
Kernel: Allow demand paging only for userspace threads
2024-04-17 01:16:43 +03:00
Bananymous
f9943b60e4
Kernel: Fix mutex try_lock return value
...
WHY IS GCC NOT COMPLAINING FROM HEADERS... I used almost 2 hours
trying to locate why AML was broken
2024-04-17 01:16:43 +03:00
Bananymous
f97fb1b35d
Kernel: Evaluate _REG on devices for embedded controller if needed
2024-04-17 01:16:43 +03:00
Bananymous
b959181afd
Kernel: Remove ACPI namespace from itself
...
This removes unnecessary cyclic reference
2024-04-17 00:52:05 +03:00
Bananymous
cbc27a94ac
Kernel: AML cleanup IfElse code
2024-04-17 00:49:07 +03:00
Bananymous
6a4f999b88
Kernel: Cleanup AML code and add evaluate for string
2024-04-16 17:39:16 +03:00
Bananymous
7707e01352
Kernel: AML add flag to force absolute lookup for ACPI namespace
2024-04-16 17:38:23 +03:00
Bananymous
e667326df5
Kernel: Fix AML if parsing
...
Parse else case unconditionally, even if _if_ case evaluates to true
2024-04-16 17:36:04 +03:00
Bananymous
f1b2d7530d
Kernel: Rework AML namespace and object hierarchy
...
Remove tree-like structure from AML. This allows more spec compliant
parsing of named objects inside not yet declared devices.
This also allows AML to be run thread safely. All object adds/removes
are now guarded by a mutex.
2024-04-16 16:47:45 +03:00
Bananymous
b6587b32b9
Kernel: ACPI ignore events from non-existent ports
2024-04-16 00:00:07 +03:00
Bananymous
b89bafa165
Kernel: Add support for power button shutdown
...
This patch implements basic support for power button using ACPI
fixed events. I still need to implement general purpose events
and embedded controller for full power button support.
2024-04-15 23:55:25 +03:00
Bananymous
9fac5f94ba
Kernel: Fix entering ACPI mode
...
My condition to check wheter to enter ACPI mode was incorrect.
I only entered ACPI mode if I already was in ACPI mode :DD
2024-04-15 15:05:48 +03:00
Bananymous
5affc73ee6
Kernel: Parse ACPI namespace only after TTY is initialized
...
This allows better debugging when there is no serial port available.
2024-04-12 16:47:17 +03:00
Bananymous
027016ddae
Kernel: Load all SSDTs and PSDTs
...
Spec says to load all tables with unique OEM table IDs but that seem
wrong.
2024-04-12 16:45:00 +03:00
Bananymous
8f2f98b7b4
Kernel: AML implement SleepOp
2024-04-12 16:17:14 +03:00
Bananymous
6b43d12469
Kernel: AML package doesn't mark ZeroOp as NullName reference
2024-04-12 16:10:16 +03:00
Bananymous
74940ed33c
Kernel: Cleanup AML code and fix bugs
...
I can enter ACPI mode on my own laptop!
2024-04-12 16:03:14 +03:00
Bananymous
17871bb3ca
Kernel: Fix ACPI namespace initialization
...
ACPI spec says that only SSDTS with unique OEM table IDs are to be
loaded.
Add loading of ACPI 1.0 PSDTs
2024-04-12 12:41:30 +03:00
Bananymous
89c4abc07a
Kernel: Cleanup AML device initialization
...
_STA and _INI are now properly called on call devices
2024-04-12 02:00:30 +03:00
Bananymous
46b5a7697c
Kernel: Implement dummy \_OSI method for AML
...
This always returns Zero (not supported)
2024-04-12 01:49:54 +03:00
Bananymous
dd8060d64f
Kernel: Add FieldElement access attribute for AML interpreter
2024-04-12 01:49:15 +03:00
Bananymous
afb1d7ef0c
Kernel: Implement more features for AML parser/interpreter
...
Added
- BankField
- BufferField
- PowerResource
- ThermalZone
- Reference
- Package element forward declare
2024-04-12 01:47:40 +03:00
Bananymous
93ddee5956
Kernel: Implement locking for AML
...
Now global lock uses the actual global lock. Currenly if no lock
can be acquired, we just panic the kernel so that I remember to
implement it properly once AML is running concurrently.
2024-04-11 01:48:46 +03:00
Bananymous
0184e5beb5
Kernel: AML tries to initialize processors when entering ACPI mode
...
I had forgotten that Processors used to be a different definition
in AML.
I also implemented reads/writes for FieldElement/IndexFieldElement
that fit in 64 bits. Reads and writes to buffer are still a TODO.
2024-04-11 01:48:46 +03:00
Bananymous
3f2e110eab
Kernel: Entering ACPI mode now actually enables ACPI
...
I used to only initialize devices, but now I send ACPI_ENABLE if
machine is not hardware reduced.
2024-04-11 00:17:03 +03:00
Bananymous
0ff68b7d66
Kernel: Make ACPI load all SSDT headers after DSDT is loaded
2024-04-10 15:03:54 +03:00
Bananymous
cdbdc1a822
Kernel: Remove lai as a dependecy
...
I don't think lai is needed anymore, since my own AML interpreter
can do ACPI poweroff which was all that lai was used for.
2024-04-10 04:39:48 +03:00
Bananymous
7a2be05c69
Kernel: Implement poweroff with my AML interpreter
...
This can succesfully poweroff qemu!
2024-04-10 04:32:35 +03:00
Bananymous
5be38d0702
Kernel: My AML parser can now enable ACPI mode on QEMU!
2024-04-10 03:05:27 +03:00
Bananymous
ff203d8d34
Kernel: Implement more AML method invocation stuff
...
Method invocation is starting to come together. This implemenetation
can interpret some of the qemu's functions to enter ACPI mode.
PCI config space access is currently the one thing is between
entering ACPI mode.
2024-04-10 01:52:14 +03:00
Bananymous
23fa39121c
Kernel: Start working on AML method evaluations
...
Also fix namespace lookup and scope creations.
2024-04-09 18:37:51 +03:00
Bananymous
b16e65168f
Kernel: Rewrite whole AML parser
...
Now AML parsing is actually done while respecting namespaces and
scopes. I implemented the minimal functionality to parse qemu's AML.
Next step is to implement AML interpreting and then we can drop lai
as a dependency.
2024-04-09 01:16:07 +03:00
Bananymous
22bc4b4271
Kernel: Fix AML package parsing
2024-04-07 20:32:22 +03:00
Bananymous
e01c049401
Kernel: Fix AML buffer parsing
2024-04-07 20:24:05 +03:00
Bananymous
e7ef7a9e55
Kernel: Implement barebones AML parser
...
This implements only parsing for AML in qemu. InvokeMethods are not
parsed since number of arguments to Methods is not yet known.
Parsing AML uses multiple kilobytes of stack space, so I increased
boot stack size by a lot :D
I am not sure where my own AML is going, but this is good start if
I decide to implement full ACPI on my own.
This code is very much just ugly macro expansion.
Qemu has 2 DefPackage elements that I am not able to parse. Package
data ends while there should be still multiple elements.
2024-04-07 17:03:30 +03:00
Bananymous
e0011d22f2
Kernel: Move ACPI to its own directory and namespace
2024-04-04 15:00:13 +03:00
Bananymous
fa900df5a7
Kernel: Add signals for threads after IRQs
...
This allows signals to be called even if the process does no syscalls
The old scheduler did signal handling but I feel like it should be
enough to handle them only after syscalls and IRQs. ISRs already
handle signals that caused the ISR and there is no other route to
kernel space.
2024-04-03 15:07:18 +03:00
Bananymous
7ef751ba95
Kernel: Fix multiprocessor for i686
...
i686 is now actually ran with multiple processors.
2024-04-03 14:42:17 +03:00
Bananymous
f8c01418b1
Kernel: Fix multiprocessing on x86_64
...
I did not even start APs after initializing them... :D
2024-04-03 14:21:55 +03:00
Bananymous
d2df55b1ac
Kernel: Allow booting with multiple processors on i686
...
Also remove unnecessary ds clearing in x86_64.
2024-04-03 02:30:38 +03:00
Bananymous
0dd74e3c9d
Kernel: Implement syscalls for i686 and cleanup x86_64
...
This actually allows i686 to boot properly!
2024-04-03 02:23:23 +03:00
Bananymous
9e073e9fa0
Kernel: Add offset for interrupt stack in Scheduler::yield()
...
This allows accessing (garbage) sp and ss in interrupt stack.
2024-04-03 00:45:22 +03:00
Bananymous
c95a271821
Kernel: Set ss in i686 tss
2024-04-03 00:43:38 +03:00
Bananymous
fe386fa819
Kernel: Implement thread start trampoline for userspace
...
This is needed on i686 to set segment registers.
2024-04-03 00:42:39 +03:00
Bananymous
4d70322eab
Kernel: Save segment registers on all interrupts on i686
2024-04-03 00:41:13 +03:00
Bananymous
d9b8391968
Kernel: Fix i686 page table global mappings
2024-04-03 00:40:16 +03:00
Bananymous
2106a9e373
Kernel: Rework scheduler/processor stacks.
2024-04-02 12:34:42 +03:00
Bananymous
5050047cef
Kernel: Rewrite whole scheduler
...
Current context saving was very hacky and dependant on compiler
behaviour that was not consistent. Now we always use iret for
context saving. This makes everything more clean.
2024-03-29 18:02:12 +02:00
Bananymous
1b65f850ee
Kernel: Rename thread stacks to more appropriate names
2024-03-27 15:06:24 +02:00
Bananymous
7c2933aae1
Kernel: Fix ISR error code formatting to 32 bit
2024-03-26 21:01:18 +02:00
Bananymous
96babec22a
Kernel: Implement Thread trampolines for x86_32
2024-03-26 21:01:18 +02:00
Bananymous
c12d1e9bd9
Kernel: Implement PageTable for x86_32
...
This is mostly copied from x86_64 with necessary modifications
2024-03-26 20:16:20 +02:00
Bananymous
4d1f0e77f2
Kernel: Fix physical address size for x86_32
...
Having 32 bit address space does not mean physical address space
is also only 32 bits...
2024-03-26 20:16:20 +02:00
Bananymous
d7bf34ecd0
Kernel: Write isr handler for x86_32 and cleanup x86_64
2024-03-26 20:16:20 +02:00
Bananymous
1943c3e7a1
Kernel: Unify IDT and GDT code between x86_64 and x86_32
...
The code is pretty much the same, so there are just couple macros
differiating initialization.
2024-03-26 16:42:02 +02:00
Bananymous
af050cc729
Kernel: Fix boot code for x86_32
...
Boot assembly now initializes processor and jumps to kernel
2024-03-26 13:25:22 +02:00
Bananymous
99e30a4d7d
Kernel: Replace i386 with i686
...
I don't really want to be working with i386 since it doesn't support
compare exchange instruction
2024-03-26 02:48:26 +02:00
Bananymous
93975fdc45
Kernel: Process signal mask is now 2 32 bit values
...
This allows signal mask to be atomic on 32 bit target
2024-03-26 02:46:51 +02:00
Bananymous
fbef90f7cb
Kernel/LibC: Write cxx abi with proper locking
2024-03-26 02:28:10 +02:00
Bananymous
a9db4dd9a3
Kernel: NVMe Queue max simultaneous commands is dependent on arch
...
This allows mask to be atomic on 32 bit architectures
2024-03-26 01:45:43 +02:00
Bananymous
fc7e96fa66
Kernel: Rewrite i386 boot code + linker script
2024-03-26 00:10:42 +02:00
Bananymous
097d9a6479
Kernel: Implement dummy IDT and GDT for i386
2024-03-26 00:10:42 +02:00
Bananymous
2dd0bfdece
Kernel: Make i386 thread tramplines crash
2024-03-26 00:10:42 +02:00
Bananymous
26585bb1d9
Kernel: Implement signal trampoline for i386
2024-03-22 15:41:15 +02:00
Bananymous
0d92719433
Kernel: Remove old i386 spinlock code
2024-03-22 15:41:15 +02:00
Bananymous
1ab2722850
Kernel: Add PageTable stub to progress linking
2024-03-22 15:41:15 +02:00
Bananymous
fe17958b9f
Kernel: Rename rsp->sp and rip->ip
...
This makes more sense if we support i386
2024-03-22 15:41:15 +02:00