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| author | marcel <marcel@FreeBSD.org> | 2007-10-16 03:20:32 +0000 |
|---|---|---|
| committer | marcel <marcel@FreeBSD.org> | 2007-10-16 03:20:32 +0000 |
| commit | 28e8a1b2edfdab03fc726df2c073da69cc761b14 (patch) | |
| tree | dc5b2d95639e645fd17541eb5c80d35656e11e37 /sys/ia64 | |
| parent | 70374bf52efc042706f4c031e8d167591d46f75a (diff) | |
| download | FreeBSD-src-28e8a1b2edfdab03fc726df2c073da69cc761b14.zip FreeBSD-src-28e8a1b2edfdab03fc726df2c073da69cc761b14.tar.gz | |
Set PTE_ACCESSED in the PTE and before inserting it in the VHPT.
This avoids back-to-back faults for all TLB misses. This can be
improved further in the future by also setting PTE_DIRTY for TLB
misses for write accesses.
MFC after: 1 week
Diffstat (limited to 'sys/ia64')
| -rw-r--r-- | sys/ia64/ia64/exception.S | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sys/ia64/ia64/exception.S b/sys/ia64/ia64/exception.S index aa96357..1f07602 100644 --- a/sys/ia64/ia64/exception.S +++ b/sys/ia64/ia64/exception.S @@ -729,7 +729,12 @@ IVT_ENTRY(Instruction_TLB, 0x0400) cmp.ne p15,p0=r21,r19 // compare tags (p15) br.cond.sptk.few 3f // if not, read next in chain ;; - ld8 r21=[r20],8 // read pte + ld8 r21=[r20] // read pte + mov r22=PTE_ACCESSED + ;; + or r21=r21,r22 + ;; + st8 [r20]=r21,8 ;; ld8 r22=[r20] // read rest of pte ;; @@ -810,7 +815,12 @@ IVT_ENTRY(Data_TLB, 0x0800) cmp.ne p15,p0=r21,r19 // compare tags (p15) br.cond.sptk.few 3f // if not, read next in chain ;; - ld8 r21=[r20],8 // read pte + ld8 r21=[r20] // read pte + mov r22=PTE_ACCESSED + ;; + or r21=r21,r22 + ;; + st8 [r20]=r21,8 ;; ld8 r22=[r20] // read rest of pte ;; |
