This is a small test kernel for 32- and 64-bit x86 systems. It started as an experiment for Multiboot (see README.multiboot), but evolved around r555 (2011-09-01) into a vehicle for low level system benchmarks supporting multiple CPUs (as of 2011-09-19, r589, see README.smp).
Contact: Georg Wassen wassen@lfbs.rwth-aachen.de
start32.asm start64.asm [32-bit early boot code]
start.asm [32-bit early boot code for both architectures]
boot32.c [32-bit machine check in real-mode]
jump64.asm [64 bit set-up]
start_smp.inc [16 bit bootstrap code into 32 bit protected mode]
...................................................................................
main.c [actual kernel]
| File | Content |
|---|---|
start32.asm |
Multiboot/a.out start code, set-up of GDT+Interrupts for 32-bit kernel |
start64.asm |
Multiboot/elf32 start code, continue in jump64.asm |
start.asm |
common initialization code for both |
boot32.c |
32-bit real-mode C code for bootstrap (hardware analyzation) |
jump64.asm |
set-up of GDT+Interrupts for 64-bit kernel |
start_smp.inc |
bootstap code for Application processors (included in start32.asm and jump64.asm) |
lib.c |
service functions for 32-bit start code and both kernels |
screen.c |
screen output for 32-bit start code and both kernels |
main.c |
start routine of actual kernel in protected mode |
*.c |
other helper functions and subsystems |