Commits

Commits on Jan 29, 2024

Fixed buddy page allocator.
shoily
committedJan 29, 2024

Commits on May 1, 2023

Replaced existing memory allocation routine with buddy page allocation.
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committedMay 1, 2023

Commits on Nov 14, 2022

Added IOAPIC interrupt handling support.
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committedNov 14, 2022

Commits on May 25, 2022

Introduce master kernel page directory. Kernel memory allocation pgd entry is
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committedMay 25, 2022

Commits on Feb 20, 2022

Added support for user mode page allocation. Uses it in usermode program for text section and stack. PGD changes can be at local CPU GDT using MAP_LOCAL_CPU flag. Added support for unmapping pages.…
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committedFeb 20, 2022

Commits on Jan 26, 2022

When allocating page(s), update all the page directories of all the active processors for kernel space. Syncrhonize between smp initialization code and page allocation code so that page directory e…
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committedJan 26, 2022

Commits on Jan 20, 2022

IOAPIC enumeration, initialization from ACPI table and basic read/write for IOAPIC. Page table initialization for the whole memory (supported upto 4GB), describe each page with kpage structure and …
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committedJan 20, 2022

Commits on Jul 7, 2021

Commits on Dec 1, 2020

Commits on Nov 18, 2020

Circular debug buffer support.
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committedNov 18, 2020

Commits on Nov 16, 2020

Refactored RSDP detection code.
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committedNov 16, 2020

Commits on Nov 14, 2020

Scanning for RSD PTR. Updated bootloader code so that loads kernel at a different address and don't clobber ACPI tables.
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committedNov 14, 2020

Commits on Nov 13, 2020

printf support added to make output and debugging easier. It outputs to an internal buffer and also outputs to VGA buffer based on a flag.
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committedNov 13, 2020

Commits on Oct 28, 2020

Added per cpu specific page directory support. GDT, LDT, IDT are common among processors but TSS is per cpu specific to fascilitate switching from user mode to kernel mode. Initialized LAPIC timer …
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committedOct 28, 2020

Commits on Oct 19, 2020

Calculates stack address for current AP from LAPIC id and use it call smp_finish_initialization C code. Introcuded spin lock to synchronize smp_bits and printing messages from initializing APs. Cle…
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committedOct 19, 2020

Commits on Oct 11, 2020

Commits on Oct 10, 2020

Use label instead of constant in bootloader for code and data segment.
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committedOct 10, 2020

Commits on Oct 5, 2020

Calibrate LAPIC timer and use this timer for handling interrupt instead of using PIT.
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committedOct 5, 2020

Commits on Aug 15, 2020

Commits on Aug 8, 2020

Commits on Jul 17, 2020

Update README.md
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committedJul 17, 2020
Added description
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committedJul 17, 2020
Added usermode support. Usermode code added in a seperate section named "um" and copied into a page frame. The pagetables are built for usermode code and stack at 1GB. Interrupt, exception and syst…
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committedJul 17, 2020

Commits on Jul 3, 2020

Added support for LDT and TSS to support user mode process.
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committedJul 3, 2020

Commits on Jun 25, 2020

Interrupt handler was missing from last commit. Adding it now. Updating README.md to compile the kernel correctly
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committedJun 25, 2020

Commits on Jun 24, 2020

Removed PIC and PIT initialization code from bootldr.S.
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committedJun 24, 2020
Updating README.md to compile new files
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committedJun 24, 2020
Initializes PIC 8259 and PIT. Re-initializes GDT. Initializes IDT. Added interrupt handler. Re-factored code.
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committedJun 24, 2020