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Save and restore the IA-32 state in cpu_switch(). Probably should only do

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this if the thread has been executing IA-32 code.
This commit is contained in:
Doug Rabson 2002-04-10 19:27:50 +00:00
parent b0685df774
commit a989d30598
1 changed files with 46 additions and 2 deletions
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48
sys/ia64/ia64/swtch.s
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@ -168,7 +168,29 @@ ENTRY(cpu_switch, 0)
st8 [r17]=r16,8 ;; // ar.rnat
ld8 r3=[r3]
st8 [r17]=r20,8 ;; // pr
st8 [r17]=r3 // current pmap
st8 [r17]=r3,8 // current pmap
mov r18=ar.fsr
;;
st8 [r17]=r18,8 // ar.fsr
mov r19=ar.fcr
;;
st8 [r17]=r19,8 // ar.fcr
mov r18=ar.fir
;;
st8 [r17]=r18,8 // ar.fir
mov r19=ar.fdr
;;
st8 [r17]=r19,8 // ar.fdr
mov r18=ar.eflag
;;
st8 [r17]=r18,8 // ar.eflag
mov r19=ar.csd
;;
st8 [r17]=r19,8 // ar.csd
mov r18=ar.ssd
;;
st8 [r17]=r18,8 // ar.ssd
mov ar.rsc=3 // turn RSE back on
@ -266,7 +288,7 @@ ENTRY(cpu_switch, 0)
ld8 r17=[r15],8 ;; // ar.pfs
ld8 r18=[r15],16 ;; // ar.bspstore, skip ar.unat
ld8 r19=[r15],8 ;; // ar.rnat
ld8 r20=[r15] ;; // pr
ld8 r20=[r15],16 ;; // pr, skip pmap
loadrs // invalidate register stack
;;
@ -276,6 +298,28 @@ ENTRY(cpu_switch, 0)
mov ar.rnat=r19
mov pr=r20,0x1ffff
;;
ld8 r16=[r15],8 // ar.fsr
;;
ld8 r17=[r15],8 // ar.fcr
mov ar.fsr=r16
;;
ld8 r16=[r15],8 // ar.fir
mov ar.fcr=r17
;;
ld8 r17=[r15],8 // ar.fdr
mov ar.fir=r16
;;
ld8 r16=[r15],8 // ar.eflag
mov ar.fdr=r17
;;
ld8 r17=[r15],8 // ar.csd
mov ar.eflag=r16
;;
ld8 r16=[r15],8 // ar.ssd
mov ar.csd=r17
;;
mov ar.ssd=r16
mov ar.rsc=3 // restart RSE
invala
;;