cvs commit: src/sys/conf ldscript.i386 src/sys/i386/i386 bios.c genassym.c locore.s machdep.c mp_machdep.c mpboot.s pmap.c src/sys/i386/include pmap.h vmparam.h

[John Baldwin]

On 01-Oct-2003 Peter Wemm wrote:
> peter       2003/10/01 16:46:08 PDT
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/conf             ldscript.i386 
>     sys/i386/i386        bios.c genassym.c locore.s machdep.c 
>                          mp_machdep.c mpboot.s pmap.c 
>     sys/i386/include     pmap.h vmparam.h 
>   Log:
>   Commit Bosko's patch to clean up the PSE/PG_G initialization to and
>   avoid problems with some Pentium 4 cpus and some older PPro/Pentium2
>   cpus.  There are several problems, some documented in Intel errata.
>   This patch:
>   1) moves the kernel to the second page in the PSE case.  There is an
>   errata that says that you Must Not point a 4MB page at physical
>   address zero on older cpus.  We avoided bugs here due to sheer luck.
>   2) sets up PSE page tables right from the start in locore, rather than
>   trying to switch from 4K to 4M (or 2M) pages part way through the boot
>   sequence at the same time that we're messing with PG_G.
>   
>   For some reason, the pmap work over the last 18 months seems to tickle
>   the problems, and the PAE infrastructure changes disturb the cpu
>   bugs even more.
>   
>   A couple of people have reported a problem with APM bios calls during
>   boot.  I'll work with people to get this resolved.
>   
>   Obtained from:  bmilekic
>   
>   Revision  Changes    Path
>   1.8       +1 -1      src/sys/conf/ldscript.i386
>   1.63      +12 -12    src/sys/i386/i386/bios.c
>   1.144     +3 -0      src/sys/i386/i386/genassym.c
>   1.175     +62 -9     src/sys/i386/i386/locore.s
>   1.573     +1 -1      src/sys/i386/i386/machdep.c
>   1.217     +2 -8      src/sys/i386/i386/mp_machdep.c
>   1.21      +16 -0     src/sys/i386/i386/mpboot.s
>   1.442     +35 -86    src/sys/i386/i386/pmap.c
>   1.101     +3 -1      src/sys/i386/include/pmap.h
>   1.37      +7 -0      src/sys/i386/include/vmparam.h

What does KERNBASE map to now?  4mb?

-- 

John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/