| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* ITLB ** ICACHE line 1: Context 0 check and TSB load */ |
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| 3 | ldxa [%g0] ASI_IMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer |
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| 4 | ldxa [%g0] ASI_IMMU, %g6 ! Get TAG TARGET |
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| 5 | srlx %g6, 48, %g5 ! Get context |
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| 6 | sllx %g6, 22, %g6 ! Zero out context |
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| 7 | brz,pn %g5, kvmap_itlb ! Context 0 processing |
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| 8 | srlx %g6, 22, %g6 ! Delay slot |
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| 9 | TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry |
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| 10 | cmp %g4, %g6 ! Compare TAG |
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| 11 | |
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| 12 | /* ITLB ** ICACHE line 2: TSB compare and TLB load */ |
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| 13 | bne,pn %xcc, tsb_miss_itlb ! Miss |
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| 14 | mov FAULT_CODE_ITLB, %g3 |
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| 15 | sethi %hi(_PAGE_EXEC_4U), %g4 |
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| 16 | andcc %g5, %g4, %g0 ! Executable? |
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| 17 | be,pn %xcc, tsb_do_fault |
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| 18 | nop ! Delay slot, fill me |
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| 19 | stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB |
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| 20 | retry ! Trap done |
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| 21 | |
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| 22 | /* ITLB ** ICACHE line 3: */ |
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| 23 | nop |
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| 24 | nop |
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| 25 | nop |
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| 26 | nop |
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| 27 | nop |
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| 28 | nop |
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| 29 | nop |
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| 30 | nop |
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| 31 | |
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| 32 | /* ITLB ** ICACHE line 4: */ |
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| 33 | nop |
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| 34 | nop |
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| 35 | nop |
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| 36 | nop |
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| 37 | nop |
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| 38 | nop |
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| 39 | nop |
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| 40 | nop |
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| 41 | |
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