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* gdt: move assembler code to archRobin Krahl2017-03-06
| | | | | The assembler code to set the global descriptor table is architecture-specific and therefore moved to arch.{c,h}.
* kernel: add debug function ker_dbgRobin Krahl2017-03-06
| | | | | ker_dbg writes a string to the terminal. In future, it might also write to a text file, to the serial console or other channels.
* arch: add port set, port get and additional register set functionsRobin Krahl2017-03-05
| | | | | Add regset16 and regset32 to the existing regset8 in arch.h, and prtset{8,16,32} and prtget{8,16,32} to access ports.
* gdt: add simple gdt implementationRobin Krahl2017-03-05
| | | | | | Add a simple Global Descriptor Table implementation based on [0]. [0] http://www.lowlevel.eu/wiki/Global_Descriptor_Table
* initial commitRobin Krahl2017-03-05