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415 Commits 1 Branch 1 Tag 3.2 MiB
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43 Commits

Author SHA1 Message Date
Drew Galbraith 838ef01a2a [Zion] Add a keyboard interrupt handler and a driver manager. 2023-11-25 11:14:30 -08:00
Drew Galbraith cb590c96b8 [Zion] Add a proc/thread cleanup thread for future use. 2023-11-24 15:04:03 -08:00
Drew Galbraith a1e1e1c2d8 [Zion] Enable SSE instructions at the start of boot. 
These aren't ready to be used yet as we need to save them on task
switch.
 2023-11-20 16:40:07 -08:00
Drew Galbraith 46d02e5eae [Zion] Remove sleeping messages. 2023-11-15 16:27:09 -08:00
Drew Galbraith 07e6e3028d [Zion] Access the KernelStackManager through the VMM. 2023-11-15 15:38:25 -08:00
Drew Galbraith c5b9d20c7e [Zion] Remove early_dbgln since dbgln no longer allocs. 2023-11-15 15:19:02 -08:00
Drew Galbraith 20d6d2aaaf [Zion] Introduce the Kernel VMM to centralize allocs. 2023-11-15 15:15:31 -08:00
Drew Galbraith cc16210e90 [Zion] Use slab allocators immediately during heap init. 2023-11-15 13:02:34 -08:00
Drew Galbraith 659f122c9e [Zion] Free memory that was allocated with the slab allocator. 
This reduces the number of active allocs by ~ 200.
Size 8: 142 -> 2
Size 16: 319 > 313
Size 32: 364-> 312
 2023-11-15 12:53:14 -08:00
Drew Galbraith 6d27ee5dc5 [Zion] Add more debug information about kernel heap usage. 
This will be helpful as we work to improve it.

Without deallocations, we currently stand at the following alloc numbers
8 - 142
16 - 319
32 - 364

unsized - 305

total page usage including slabs is 12.
 2023-11-15 12:36:18 -08:00
Drew Galbraith d71d543b2a [Zion] Move to a kernel slab allocator that will allow easier dealloc. 2023-11-15 12:04:35 -08:00
Drew Galbraith a745f45b5d [Zion] Add a method to dump the bootloader memory regions. 2023-11-08 08:07:57 -08:00
Drew Galbraith 4af19d010f [Zion] Add an early debug method without allocations. 2023-11-05 08:48:41 -08:00
Drew Galbraith ee603b7478 [zion] Add a basic slab allocator to the kernel. 
Don't free from the slab allocator yet but allocations appear to work.
 2023-08-02 00:54:39 -07:00
Drew Galbraith e3a425e274 [zion] Use a separate stack for PF and GP faults in the kernel. 2023-08-01 23:11:12 -07:00
Drew Galbraith 35b1844862 [zion] Move all APIC functions into a global class. 2023-08-01 22:38:40 -07:00
Drew Galbraith f8de60e2dd [zion] Move more initialization into the ApicTimer class. 2023-08-01 21:48:20 -07:00
Drew Galbraith d99624daf6 [zion] Move to using the LAPIC timer over the PIT. 2023-08-01 20:18:47 -07:00
Drew Galbraith 3e1e37bf03 Probe RSDP for PCIe Config 2023-06-07 16:24:13 -07:00
Drew Galbraith eb04242a59 Add a debug mode for the KernelHeap. 2023-06-07 10:01:22 -07:00
Drew Galbraith f22dd66c8d Manage KernelStacks separately rather than just allocing bytes. 
Create a global KernelStackManager that will handle the relevant allocs.
 2023-05-30 21:28:44 -07:00
Drew Galbraith f6609983d2 Move away from using recursive mapping for page tables. 
Having the HHDM-based mapping allows us to more easily map data into
non-resident processes.
 2023-05-30 01:06:01 -07:00
Drew Galbraith de49dcc01a Move scheduler to new global class format. 2023-05-29 23:48:32 -07:00
Drew Galbraith 7fe6c24aa5 Add a ProcessManager class to store Process objects. 
Trying out a new method for exposing global objects directly via a
variable.
 2023-05-29 23:35:44 -07:00
Drew Galbraith 656687b183 Schedule on PIC timer raise. 
This causes a page fault because we don't properly handle the sleep
case.
 2023-05-29 22:32:50 -07:00
Drew Galbraith 496dfeaef9 Update the timer to a more reasonable time slice of 50ms 2023-05-29 22:17:56 -07:00
Drew Galbraith 629dca278b Enable the PIC and add a timer. 
This causes a GP fault after the timer runs for some time.
 2023-05-29 21:52:01 -07:00
Drew Galbraith aefb4f082b Add a kernel ELF module and load it in a new process. 
Don't yet jump to userspace.
 2023-05-29 00:32:54 -07:00
Drew Galbraith f86bbe6ea9 Wireframe for syscalls in place 2023-05-18 16:03:09 -07:00
Drew Galbraith d3024211a7 Cycle through multiple tasks in multiple processes 2023-05-18 13:56:54 -07:00
Drew Galbraith 0d275c72a1 Have processes enqueue their own threads 2023-05-18 13:28:22 -07:00
Drew Galbraith cb41953354 Scheduler with working threads. 
Currently only one process but it is a start.
 2023-05-18 13:24:02 -07:00
Drew Galbraith 960cbf9519 Add Scheduler wireframe. 
Right now does nothing but has containing classes for process and thread
information.
 2023-05-18 12:43:53 -07:00
Drew Galbraith fa2bb4df89 Added a PhysicalMemoryManager class. 
Stores a linkedlist of free blocks of PhysicalMemory.
 2023-05-18 11:34:45 -07:00
Drew Galbraith 2d719d0443 Add a bootstrap physical memory manager. 
This will allow the real physical memory manager to use allocations.
 2023-05-18 11:00:05 -07:00
Drew Galbraith 0b7e667368 Add a basic kernel heap object. 
Currently allocation always fails because we don't
have a way to allocate a physical page.
 2023-05-18 10:59:39 -07:00
Drew Galbraith 45b5817a36 Recursively map the PML4 2023-05-18 02:00:01 -07:00
Drew Galbraith b3f8cb9003 Dump the memory map from limine. 
Also adds the ability to print formatted messages.
 2023-05-18 01:16:53 -07:00
Drew Galbraith 9fc1aa15ef Add an interrupt descriptor table. 
Set up a very basic handler for divide by zero and
general protection faults.
 2023-05-17 22:54:37 -07:00
Drew Galbraith 03fe4d8c2e Load our own GDT. 
Replace the GDT from limine with our own.
 2023-05-17 21:41:08 -07:00
Drew Galbraith 872e6f3392 Add a debug output utility. 2023-05-17 20:42:59 -07:00
Drew Galbraith 91b52f1872 Move IO Port Function to a separate file 2023-05-17 20:26:51 -07:00
Drew Galbraith e9705f7579 Barebones Kernel Commit 
Uses limine to boot off of a disk.
Outputs a character to the debug port.
 2023-05-17 20:20:53 -07:00