From 517af33237ecfc3c8a93b335365fa61e741ceca4 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 1 Feb 2006 15:55:21 -0800 Subject: [SPARC64]: Access TSB with physical addresses when possible. This way we don't need to lock the TSB into the TLB. The trick is that every TSB load/store is registered into a special instruction patch section. The default uses virtual addresses, and the patch instructions use physical address load/stores. We can't do this on all chips because only cheetah+ and later have the physical variant of the atomic quad load. Signed-off-by: David S. Miller --- arch/sparc64/kernel/ktlb.S | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'arch/sparc64/kernel/ktlb.S') diff --git a/arch/sparc64/kernel/ktlb.S b/arch/sparc64/kernel/ktlb.S index 2b5e71b6888..9b415ab6db6 100644 --- a/arch/sparc64/kernel/ktlb.S +++ b/arch/sparc64/kernel/ktlb.S @@ -44,14 +44,14 @@ kvmap_itlb_tsb_miss: kvmap_itlb_vmalloc_addr: KERN_PGTABLE_WALK(%g4, %g5, %g2, kvmap_itlb_longpath) - TSB_LOCK_TAG(%g1, %g2, %g4) + KTSB_LOCK_TAG(%g1, %g2, %g4) /* Load and check PTE. */ ldxa [%g5] ASI_PHYS_USE_EC, %g5 brgez,a,pn %g5, kvmap_itlb_longpath - stx %g0, [%g1] + KTSB_STORE(%g1, %g0) - TSB_WRITE(%g1, %g5, %g6) + KTSB_WRITE(%g1, %g5, %g6) /* fallthrough to TLB load */ @@ -69,9 +69,9 @@ kvmap_itlb_longpath: kvmap_itlb_obp: OBP_TRANS_LOOKUP(%g4, %g5, %g2, %g3, kvmap_itlb_longpath) - TSB_LOCK_TAG(%g1, %g2, %g4) + KTSB_LOCK_TAG(%g1, %g2, %g4) - TSB_WRITE(%g1, %g5, %g6) + KTSB_WRITE(%g1, %g5, %g6) ba,pt %xcc, kvmap_itlb_load nop @@ -79,9 +79,9 @@ kvmap_itlb_obp: kvmap_dtlb_obp: OBP_TRANS_LOOKUP(%g4, %g5, %g2, %g3, kvmap_dtlb_longpath) - TSB_LOCK_TAG(%g1, %g2, %g4) + KTSB_LOCK_TAG(%g1, %g2, %g4) - TSB_WRITE(%g1, %g5, %g6) + KTSB_WRITE(%g1, %g5, %g6) ba,pt %xcc, kvmap_dtlb_load nop @@ -114,14 +114,14 @@ kvmap_linear_patch: kvmap_dtlb_vmalloc_addr: KERN_PGTABLE_WALK(%g4, %g5, %g2, kvmap_dtlb_longpath) - TSB_LOCK_TAG(%g1, %g2, %g4) + KTSB_LOCK_TAG(%g1, %g2, %g4) /* Load and check PTE. */ ldxa [%g5] ASI_PHYS_USE_EC, %g5 brgez,a,pn %g5, kvmap_dtlb_longpath - stx %g0, [%g1] + KTSB_STORE(%g1, %g0) - TSB_WRITE(%g1, %g5, %g6) + KTSB_WRITE(%g1, %g5, %g6) /* fallthrough to TLB load */ -- cgit v1.2.3