1/* SPDX-License-Identifier: GPL-2.0 */ 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 6 sllx %g6, 22, %g6 ! Zero out context 7 brz,pn %g5, kvmap_itlb ! Context 0 processing 8 srlx %g6, 22, %g6 ! Delay slot 9 TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry 10 cmp %g4, %g6 ! Compare TAG 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 15 sethi %hi(_PAGE_EXEC_4U), %g4 16 andcc %g5, %g4, %g0 ! Executable? 17 be,pn %xcc, tsb_do_fault 18 nop ! Delay slot, fill me 19 stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB 20 retry ! Trap done 21 22/* ITLB ** ICACHE line 3: */ 23 nop 24 nop 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 41