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gerrit-public.fairphone.software / kernel / msm-4.9 / refs/tags/FP3-REL-Q-3.A.0107 / . / arch / sparc / kernel / itlb_miss.S
blob: 5a8377b54955b3ff57ff82414575a237b1c0d787 [file] [log] [blame]
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]1/* ITLB ** ICACHE line 1: Context 0 check and TSB load */
2 ldxa [%g0] ASI_IMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer
3 ldxa [%g0] ASI_IMMU, %g6 ! Get TAG TARGET
4 srlx %g6, 48, %g5 ! Get context
David S. Miller8b234272006-02-17 18:01:02 -0800[diff] [blame]5 sllx %g6, 22, %g6 ! Zero out context
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]6 brz,pn %g5, kvmap_itlb ! Context 0 processing
David S. Miller8b234272006-02-17 18:01:02 -0800[diff] [blame]7 srlx %g6, 22, %g6 ! Delay slot
David S. Miller517af332006-02-01 15:55:21 -0800[diff] [blame]8 TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]9 cmp %g4, %g6 ! Compare TAG
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]10
11/* ITLB ** ICACHE line 2: TSB compare and TLB load */
12 bne,pn %xcc, tsb_miss_itlb ! Miss
13 mov FAULT_CODE_ITLB, %g3
David S. Miller67929292007-05-27 20:24:47 -0700[diff] [blame]14 sethi %hi(_PAGE_EXEC_4U), %g4
15 andcc %g5, %g4, %g0 ! Executable?
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]16 be,pn %xcc, tsb_do_fault
17 nop ! Delay slot, fill me
David S. Miller45f791e2006-03-01 22:42:18 -0800[diff] [blame]18 stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB
19 retry ! Trap done
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]20
21/* ITLB ** ICACHE line 3: */
David S. Miller45f791e2006-03-01 22:42:18 -0800[diff] [blame]22 nop
23 nop
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]24 nop
25 nop
26 nop
27 nop
28 nop
29 nop
30
31/* ITLB ** ICACHE line 4: */
32 nop
33 nop
34 nop
35 nop
36 nop
37 nop
38 nop
39 nop