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review.evervolv.com / android_kernel_oneplus_msm8996 / 8b234274418d6d79527c4ac3a72da446ca4cb35f / . / arch / sparc64 / kernel / itlb_miss.S
blob: 6dfe3968c3799e920d8124b8164aa2180e4a954d [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 */
David S. Miller8b234272006-02-17 18:01:02 -0800[diff] [blame^]12 sethi %hi(PAGE_EXEC), %g4 ! Setup exec check
David S. Millerc4bce902006-02-11 21:57:54 -0800[diff] [blame]13 ldx [%g4 + %lo(PAGE_EXEC)], %g4
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]14 bne,pn %xcc, tsb_miss_itlb ! Miss
15 mov FAULT_CODE_ITLB, %g3
16 andcc %g5, %g4, %g0 ! Executable?
17 be,pn %xcc, tsb_do_fault
18 nop ! Delay slot, fill me
David S. Miller8b234272006-02-17 18:01:02 -0800[diff] [blame^]19 nop
David S. Miller74bf4312006-01-31 18:29:18 -0800[diff] [blame]20
21/* ITLB ** ICACHE line 3: */
David S. Miller8b234272006-02-17 18:01:02 -0800[diff] [blame^]22 stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB
23 retry ! Trap done
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