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| author | David S. Miller <davem@davemloft.net> | 2006-02-01 05:33:00 +0300 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 12:11:22 +0300 |
| commit | 4da808c352c290d3f762933d44d4ab90c2fd65f3 (patch) | |
| tree | da99326440777580a19c345a5b0d52fbf800042b /arch/sparc64/mm/ultra.S | |
| parent | 4753eb2ac7022b999e5e484f1a5dc001dba22bd3 (diff) | |
| download | linux-4da808c352c290d3f762933d44d4ab90c2fd65f3.tar.xz | |
[SPARC64]: Fix bogus flush instruction usage.
Some of the trap code was still assuming that alternate
global %g6 was hard coded with current_thread_info().
Let's just consistently flush at KERNBASE when we need
a pipeline synchronization. That's locked into the TLB
and will always work.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/mm/ultra.S')
| -rw-r--r-- | arch/sparc64/mm/ultra.S | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S index a87394824ec2..269ed57b3e9d 100644 --- a/arch/sparc64/mm/ultra.S +++ b/arch/sparc64/mm/ultra.S @@ -36,9 +36,10 @@ __flush_tlb_mm: /* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */ mov 0x50, %g3 stxa %g0, [%g3] ASI_DMMU_DEMAP stxa %g0, [%g3] ASI_IMMU_DEMAP + sethi %hi(KERNBASE), %g3 + flush %g3 retl - flush %g6 - nop + nop nop nop nop @@ -72,7 +73,8 @@ __flush_tlb_pending: brnz,pt %o1, 1b nop stxa %g2, [%o4] ASI_DMMU - flush %g6 + sethi %hi(KERNBASE), %o4 + flush %o4 retl wrpr %g7, 0x0, %pstate nop @@ -94,8 +96,10 @@ __flush_tlb_kernel_range: /* %o0=start, %o1=end */ membar #Sync brnz,pt %o3, 1b sub %o3, %o4, %o3 -2: retl - flush %g6 +2: sethi %hi(KERNBASE), %o3 + flush %o3 + retl + nop __spitfire_flush_tlb_mm_slow: rdpr %pstate, %g1 @@ -105,7 +109,8 @@ __spitfire_flush_tlb_mm_slow: stxa %g0, [%g3] ASI_IMMU_DEMAP flush %g6 stxa %g2, [%o1] ASI_DMMU - flush %g6 + sethi %hi(KERNBASE), %o1 + flush %o1 retl wrpr %g1, 0, %pstate @@ -181,7 +186,7 @@ __flush_dcache_page: /* %o0=kaddr, %o1=flush_icache */ .previous /* Cheetah specific versions, patched at boot time. */ -__cheetah_flush_tlb_mm: /* 18 insns */ +__cheetah_flush_tlb_mm: /* 19 insns */ rdpr %pstate, %g7 andn %g7, PSTATE_IE, %g2 wrpr %g2, 0x0, %pstate @@ -196,12 +201,13 @@ __cheetah_flush_tlb_mm: /* 18 insns */ stxa %g0, [%g3] ASI_DMMU_DEMAP stxa %g0, [%g3] ASI_IMMU_DEMAP stxa %g2, [%o2] ASI_DMMU - flush %g6 + sethi %hi(KERNBASE), %o2 + flush %o2 wrpr %g0, 0, %tl retl wrpr %g7, 0x0, %pstate -__cheetah_flush_tlb_pending: /* 26 insns */ +__cheetah_flush_tlb_pending: /* 27 insns */ /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */ rdpr %pstate, %g7 sllx %o1, 3, %o1 @@ -225,7 +231,8 @@ __cheetah_flush_tlb_pending: /* 26 insns */ brnz,pt %o1, 1b nop stxa %g2, [%o4] ASI_DMMU - flush %g6 + sethi %hi(KERNBASE), %o4 + flush %o4 wrpr %g0, 0, %tl retl wrpr %g7, 0x0, %pstate @@ -265,14 +272,14 @@ cheetah_patch_cachetlbops: sethi %hi(__cheetah_flush_tlb_mm), %o1 or %o1, %lo(__cheetah_flush_tlb_mm), %o1 call cheetah_patch_one - mov 18, %o2 + mov 19, %o2 sethi %hi(__flush_tlb_pending), %o0 or %o0, %lo(__flush_tlb_pending), %o0 sethi %hi(__cheetah_flush_tlb_pending), %o1 or %o1, %lo(__cheetah_flush_tlb_pending), %o1 call cheetah_patch_one - mov 26, %o2 + mov 27, %o2 #ifdef DCACHE_ALIASING_POSSIBLE sethi %hi(__flush_dcache_page), %o0 |