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The Project Structure of The BORON Kernel

Currently this is only a plan.

  • ke/: Architecture independent 'sub-kernel'-module. Implements SMP, locking, and the scheduler.

  • ex/: Contains the executive initialization routines, as well as extra helpers that depend on kernel functions.

  • mm/: Memory management module - handles page faults, copy-on-write, demand paging, maybe even compression and swapping in the future

  • arch/: Architecture abstractions. These abstract the CPU away from other parts of the kernel. It handles page table management, context switching, interrupt priority level setting, and CPU intrinsics

  • rtl/ - Run-time library - Includes functions such as sprint, memcpy, strcpy.

  • ldr/ - DLL driver loader. Loads the driver DLLs into the kernel's memory region.

Layering Diagram

Here is a mockup of the layering in Boron (still a WIP):

+-------------------------------------------------+
| User Mode                                       |
| +---------+ +---------+ +---------+ +---------+ |
| |   App   | |   App   | |   App   | |   App   | |
| +---------+ +---------+ +---------+ +---------+ |
+-----------------------||------------------------+
========================||========================= USER ^ / KERNEL v
+-----------------------||------------------------+
| System Call Handler                             |
+-----------------------||------------------------+
| Executive                                       |
|                                                 |
| +--------+  +--------+  +--------+              |
| |   Io   |  |   Cc   |  |  Mm 2  |              |
| +--------+  +--------+  +--------+              |
| +--------+  +--------+  +--------+              |
| |   Ob   |  |   Ps   |  |   Cm   |              |
| +--------+  +--------+  +--------+              |
+-----------------------||------------------------+
| Kernel Core                                     |
|                                                 |
| +--------+  +--------+  +--------+  +--------+  |
| |   Ke   |  |  Arch  |  |  Mm 1  |  |   Ldr  |  |
| +--------+  +--------+  +--------+  +--------+  |
+-----------------------||------------------------+
|                    Hardware                     |
+-------------------------------------------------+