projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 74bf4312 DM |
2 | /* ITLB ** ICACHE line 1: Context 0 check and TSB load */ |
| 3 | ldxa [%g0] ASI_IMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer | |
| 4 | ldxa [%g0] ASI_IMMU, %g6 ! Get TAG TARGET | |
| 5 | srlx %g6, 48, %g5 ! Get context | |
| 8b234274 | 6 | sllx %g6, 22, %g6 ! Zero out context |
| 74bf4312 | 7 | brz,pn %g5, kvmap_itlb ! Context 0 processing |
| 8b234274 | 8 | srlx %g6, 22, %g6 ! Delay slot |
| 517af332 | 9 | TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry |
| 74bf4312 | 10 | cmp %g4, %g6 ! Compare TAG |
| 74bf4312 DM |
11 | |
| 12 | /* ITLB ** ICACHE line 2: TSB compare and TLB load */ | |
| 13 | bne,pn %xcc, tsb_miss_itlb ! Miss | |
| 14 | mov FAULT_CODE_ITLB, %g3 | |
| 67929299 DM |
15 | sethi %hi(_PAGE_EXEC_4U), %g4 |
| 16 | andcc %g5, %g4, %g0 ! Executable? | |
| 74bf4312 DM |
17 | be,pn %xcc, tsb_do_fault |
| 18 | nop ! Delay slot, fill me | |
| 45f791eb DM |
19 | stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB |
| 20 | retry ! Trap done | |
| 74bf4312 DM |
21 | |
| 22 | /* ITLB ** ICACHE line 3: */ | |
| 45f791eb DM |
23 | nop |
| 24 | nop | |
| 74bf4312 DM |
25 | nop |
| 26 | nop | |
| 27 | nop | |
| 28 | nop | |
| 29 | nop | |
| 30 | nop | |
| 31 | ||
| 32 | /* ITLB ** ICACHE line 4: */ | |
| 33 | nop | |
| 34 | nop | |
| 35 | nop | |
| 36 | nop | |
| 37 | nop | |
| 38 | nop | |
| 39 | nop | |
| 40 | nop |