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Date: Wed, 08 Aug 2001 10:24:41 +0900
From: Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
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Subject: [FreeBSD-users-jp 63470] Re: CR4.PGE seems to be enabled
 before CR0.PG in locore.s ??
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$B$$$o$5$-$G$9(B

> > $B$&!<$s!"<j85$NF1$8;qNA$N3:Ev8D=j(B 2-16 $B$K$O$=$&$$$&5-=R$O$"$j$^$;$s$G$7$?!#(B
> > $B;qNAHV9f(B 243192J$B!"(B1997$B$N$b$N$G$9!#$/$^$V$A$5$s$,$*;}$A$N$d$D$O!"$$$D$N(B
> > $B$b$N$G$7$g$&$+(B?  $BG0$N$?$a(B
> 
> $B$($H!";d$N<j85$N$b$N$G$O(B 2-17 $B$N:G8e$N(B PGE $B$N@bL@2U=j$K5-:\$5$l$F$$$^(B
> $B$9!#$b$N$O(B
> http://www.intel.co.jp/jp/developer/design/pentium/manuals/index.htm
> $B0J2<$N%j%s%/@h$+$i:G6aMn$H$7$F$-$?$b$N$G(B 1999 $B$H$J$C$F$$$^$9!#$$$o$5$-(B
> $B$5$s$N$*<j85$N$b$N$h$jHG$,?7$7$$46$8$G$9$M!#(B
> MD5 (24319202_j.pdf) = 2c570408ba841d588b56f19a7fbf4ecd

$B$r$r!"$d$O$j$=$&$$$&$3$H$G$7$?$+!#@N8+$D$1$?(BURL$B$N6a$/$P$C$+$j$&$m$&$m(B
$B$7$F$^$7$?(B (^^;  $B46<U(B!

> > ftp://download.intel.com/design/mobile/MANUALS/24319201.pdf
> > $B$+$i1Q8l$N%d%D$r;}$C$F$-$F0lDL$jFI$s$G$_$^$7$?$,!"(BPGE$B$K4X$7$F$OF|K\8lHG$N(B
> > $B5-=R$HF1$8$G$7$?!#(B
> 
> $BF|K\8lHG$HF1$8$H$3$m$+$iMn$H$7$F$-$?1Q8lHG$N$b$N(B(243192, 1999)$B$@$H!"(B
> 2-17 $B!A(B 2-18 $B$,3:Ev$7$F$$$^$9!#(B
> MD5 (24319202.pdf) = bef02e3a98c3db00a087beafccc87610

$B1Q8lHG$@$H$3$A$i$G$9$M!#(B
ftp://download.intel.com/design/PentiumII/manuals/24319202.pdf

2.5. CONTROL REGISTERS
[snip]
PGE
(2-17)
Page Global Enable (bit 7 of CR4). (Introduced in the P6 family
processors.) Enables the global page feature when set; disables the
global page feature when clear. [snip] In addition, the bit must not
be enabled before paging is enabled via CR0.PG. Program correctness
may be affected by reversing this sequence, and processor performance
will be impacted.

$B$=$l$G$O:#HU$"$?$j!"$3$NJU$^$H$a$FE,Ev$J(BML$B$KJs9p$7$F%Q%C%A$r$_$F$b$i$$(B
$B$^$9!#(BPGE$B$rN)$F$k%?%$%_%s%0$O(BCR3$B$r@_Dj$9$kA0$H8e$I$A$i$,$$$$$N$+!"$^$@(B
$B$A$g$C$HD4$Y$-$l$F$J$/$F!"$=$N$X$s$"$d$7$$$7!#(B
$B$/$^$V$A$5$s$K$b(BCc$B$7$^$9$N$G!"E,Ev$K%D%C$3$s$G$/$@$5$$$^$;!#(B

$B$G$O(B
