Messages in this thread |  | | Date | Tue, 09 Jan 2001 18:03:07 -0500 | | From | Brian Gerst <> | | Subject | Re: Anybody got 2.4.0 running on a 386 ? |
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Robert Kaiser wrote: > > On Die, 09 Jan 2001 you wrote: > > Robert Kaiser wrote: > > > > > > On Die, 09 Jan 2001 you wrote: > > > > Robert Kaiser wrote: > > > > > I can't seem to get the new 2.4.0 kernel running on a 386 CPU. > > > > > The kernel was built for a 386 Processor, Math emulation has been enabled. > > > > > I tried three different 386 boards. Execution seems to get as far as > > > > > pagetable_init() in arch/i386/mm/init.c, then it falls back into the BIOS as > > > > > if someone had pressed the reset button. The same kernel boots fine on > > > > > 486 and Pentium Systems. > > > ..... The last thing I see is > > > "Uncompressing Linux... Ok, booting the kernel." I have added some > > > quick and dirty debug code that writes messages directly to the VGA > > > screen buffer. According to that, execution seems to get as far as the > > > statement > > > > > > *pte = mk_pte_phys(__pa(vaddr), PAGE_KERNEL); > > > > > > > Could it be possible that memory size is being misdetected? Try mem=8M > > (or less) on the command line. Try to catch the value of pte when it > > crashes. > > I tried "mem=4M" -- no effect. The value of pte is 0xc0001000, so it seems > to be the first invocation of that statement in the for() loop. > > Now comes the amazing (to me) part: I split the above statement up into: > > temp = mk_pte_phys(__pa(vaddr), PAGE_KERNEL); > *pte = temp; > > where temp is declared "volatile pte_t". I inserted test-prints between the > above two lines. Accoding to that, the _first_ line , i.e. the evaluation of the > mk_pte_phys() macro is causing the crash! > > I am still trying to figure out what mk_pte_phys() does. Apparently it involves > an access to the kernel's data section. My current guess is that the data > section is not correctly mapped at this point. Would that be possible ?
How much physical memory does this box really have?
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