lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[SPARC64]: Simplify TSB insert checks.

Browse Source 
Don't try to avoid putting non-base page sized entries
into the user TSB.  It actually costs us more to check
this than it helps.

Eventually we'll have a multiple TSB scheme for user
processes.  Once a process starts using larger pages,
we'll allocate and use such a TSB.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-03-05 18:26:24 -08:00
parent 3cab0c3e86
commit 74ae998772
2 changed files with 6 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
arch/sparc64/kernel/tsb.S
View File

@@ -55,20 +55,6 @@ tsb_reload:
brgez,a,pn %g5, tsb_do_fault
TSB_STORE(%g1, %g7)
/* If it is larger than the base page size, don't
* bother putting it into the TSB.
*/
sethi %hi(_PAGE_ALL_SZ_BITS), %g7
ldx [%g7 + %lo(_PAGE_ALL_SZ_BITS)], %g7
and %g5, %g7, %g2
sethi %hi(_PAGE_SZBITS), %g7
ldx [%g7 + %lo(_PAGE_SZBITS)], %g7
cmp %g2, %g7
mov 1, %g7
sllx %g7, TSB_TAG_INVALID_BIT, %g7
bne,a,pn %xcc, tsb_tlb_reload
TSB_STORE(%g1, %g7)
TSB_WRITE(%g1, %g5, %g6)
/* Finally, load TLB and return from trap. */