Messages in this thread | ![/](/images/icornerl.gif) | | From | Andrew Kirilenko <> | Subject | Re: Data storing | Date | Wed, 23 Apr 2003 15:28:08 +0300 |
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Hello!
> > I need to make some checks (search for particular BIOS version) in the > > very start of the kernel. I need to store this data (zero page is pretty > > good for this, I think) and access it from arch/i386/boot/setup.S, > > arch/i386/boot/compressed/misc.c and in some other places. Can somebody > > suggest me good place to put check procedure and how to pass data? > > I use 0x000001f0 (absolute) for relocating virtual disk code > for booting embedded systems. After Linux is up, the code remains > untouched. This might be a good location because the BIOS doesn't > use it during POST/boot and Linux (currently) leaves it alone. > Of course, this doesn't mean that somebody will not destroy this > area in the future (probably to spite you and me!!!).
Yes, I know about this area, as I wrote (Documentation/i386/zero-page.txt). And I even know how to pass parameter from zero-page into kernel space (setup.c). But I need to use this parm, I fetched, in both setup.S and misc.c (see below). And I don't have any ideas about execute order of setup.S, misc.c and setup.c.
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