platform/pc64 will be dropped

Simon 'corecode' Schubert corecode at fs.ei.tum.de
Thu Aug 23 01:23:25 PDT 2007


Hey,

I just had a look into making the kernel compile for amd64.  What I found is the following.

The platform files for pc32 and pc64 are VERY simmilar.  In fact, everything which is not simmilar is cpu-specific bits which need to go into the cpu hierarchy.

Maintaining both seems to be absolutely backwards.  Why have different trees for the same hardware?  The hardware *is* the same.  It is just the CPU, i.e. the instruction set architecture (ISA) which is different.  Everything else, ranging from acpi to smp is the same.  So the obvious and correct solution is to just maintain one.

This, however, leaves us with an awkward name.  Pc32 for x86_64?  The pc32 name always seemed wrong.  How about calling it "ibm-pc"?  After all, that's the basic architecture, since almost 20 years.  Actually, the more I think about it, the more it makes sense it me.

I'll start picking out CPU-specific bits from the pc32 directory and move it to the cpu/i386 directory (and try to update the amd64 directory in the go).

cheers
 simon
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