Commits

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.
shoily
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.
shoily
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 …
shoily
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…
shoily
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.
shoily
committedOct 10, 2020

Commits on Oct 5, 2020

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

Commits on Aug 15, 2020

Commits on Aug 8, 2020

Commits on Jul 17, 2020

Update README.md
shoily
committedJul 17, 2020
Added description
shoily
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…
shoily
committedJul 17, 2020

Commits on Jul 3, 2020

Added support for LDT and TSS to support user mode process.
shoily
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
shoily
committedJun 25, 2020

Commits on Jun 24, 2020

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

Commits on Mar 29, 2020

Added data structure for GDT, IDT, TSS along with related macros to set values. Reinitialization of GDT to enable interrupt and task switching in protected mode later. Reorganized code to move VGA …
shoily
committedMar 29, 2020

Commits on Mar 26, 2020

Commits on Mar 25, 2020

Commits on Feb 14, 2020

Update start.c
shoily
committedFeb 14, 2020
Update bootldr.S
shoily
committedFeb 14, 2020
Update boot32.S
shoily
committedFeb 14, 2020
Update README.md
shoily
committedFeb 14, 2020

Commits on Feb 12, 2020

Adding <br>
shoily
committedFeb 12, 2020
Adding README.md
shoily
committedFeb 12, 2020
Boot loader code, kernel boot and startup routine
shoily
committedFeb 12, 2020