| David S. Miller | 74bf431 | 2006-01-31 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 |
| 5 | brz,pn %g5, kvmap_itlb ! Context 0 processing |
| 6 | nop ! Delay slot (fill me) |
| 7 | ldda [%g1] ASI_NUCLEUS_QUAD_LDD, %g4 ! Load TSB entry |
| 8 | cmp %g4, %g6 ! Compare TAG |
| 9 | sethi %hi(_PAGE_EXEC), %g4 ! Setup exec check |
| 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 |
| 14 | andcc %g5, %g4, %g0 ! Executable? |
| 15 | be,pn %xcc, tsb_do_fault |
| 16 | nop ! Delay slot, fill me |
| 17 | stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB |
| 18 | retry ! Trap done |
| 19 | nop |
| 20 | |
| 21 | /* ITLB ** ICACHE line 3: */ |
| 22 | nop |
| 23 | nop |
| 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 |