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