Messages in this thread | | | Date | Wed, 23 Apr 2003 07:36:59 -0700 | From | "Randy.Dunlap" <> | Subject | Re: Data storing |
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On Wed, 23 Apr 2003 15:28:08 +0300 Andrew Kirilenko <icedank@gmx.net> wrote:
| > > 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.
Hi, Some of this early boot info can be found in my (somewhat old) "Linux 2.4.x Initialization for IA-32", located at http://www.xenotime.net/linux/linit/lin240_init_x86.html
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