e27ef97682
core: Set new threads' priority to 127
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This is halfway through the priority range, so user processes can either lower or raise their priority from the default.
2025-02-18 19:30:46 +01:00
9cdf9aa71b
core/x86_64: Make in/out wrappers inline
2025-02-17 23:04:58 +01:00
c455e8ea0b
core: Fix a small error in thread.zig
2025-02-17 23:04:43 +01:00
f0d5b60b83
core: Add priority-based scheduling
2025-02-17 20:15:30 +01:00
0edcae7aae
core: Store the physical page directory alongside the virtual pointer to it
2025-02-16 13:20:02 +01:00
d7557d84f7
init: Add system call handling code
2025-02-16 11:58:20 +01:00
46a0c8c800
core: Add memory and scheduler related system calls
2025-02-16 11:58:12 +01:00
5eabb6bdf0
core: Add PIT timer code to preempt the scheduler
2025-02-16 11:58:01 +01:00
c86481f2e7
core: Allocate a stack for each core's idle thread
2025-02-16 11:57:27 +01:00
6a2323c16b
core: Add thread states
2025-02-16 11:57:04 +01:00
77cee5aeb0
core: Add global FrameAllocator with locking
2025-02-16 11:56:14 +01:00
2fd618173f
core: Add spinlock code
2025-02-16 11:52:45 +01:00
09fb2b6554
core: Fix a few bugs in threading code
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g_threads is processor-specific now, so it's unused, and setPageDirectory() needs the physical address.
2025-02-15 22:58:34 +01:00
2f77128437
Update README.md
2025-02-15 22:55:13 +01:00
614ed80980
core: Add a simple ELF loader
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We only need the ELF loader for init, and possibly a few other modules. The bulk of loading executables is going to be done by userspace, so we only need the basics here.
2025-02-15 22:46:28 +01:00
985d8fec0a
core: Add basic threading code
2025-02-15 22:45:32 +01:00
14578a0fee
core/x86_64: Set up a second stack in the TSS to handle system calls
2025-02-15 22:40:48 +01:00
654b228f10
core: Fix a couple of bugs in VMM and add a few utility functions
2025-02-15 22:23:00 +01:00
ffa9b78bf7
core/x86_64: Enable the NX bit before using it
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Spent an embarrassing amount of time trying to figure out why there was a page fault with "reserved bits set". Turns out, I had set the NX bit without enabling it.
2025-02-15 22:22:04 +01:00
da5335410d
core/x86_64: Add general protection fault handler
2025-02-15 22:19:08 +01:00
c4bb857c4e
core: Reserve physical page 0
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In the kernel's early stages we access physical memory identity-mapped, so it's not very good for us to allocate that frame and then try to use it.
2025-02-15 22:18:49 +01:00
baf3d39e98
core: Make findMultibootTags take a context argument
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Will be useful later.
2025-02-15 22:18:05 +01:00
d8236bc8f7
core: Add a page fault handler
2025-02-15 15:18:40 +01:00
18ec598394
core: Enable interrupts in platformEndInit()
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This way, each architecture can re-enable interrupts whenever necessary
2025-02-15 15:18:24 +01:00
1ec239147a
core: Add workaround for QEMU-specific triple-faults without KVM
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Without KVM, qemu inserts an invalid 12-GiB reserved entry at the end of the physical address space, making the kernel reserve way more space than necessary for the page bitmap (and overwriting the page directory pages).
2025-02-15 15:16:50 +01:00
fce8a58cf6
Ready. Set. Go!
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Microkernel development in Zig, should be fun! =]
2025-02-13 22:39:48 +01:00
