threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
41 lines
893 B
ArmAsm
41 lines
893 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* ITLB ** ICACHE line 1: Context 0 check and TSB load */
|
|
ldxa [%g0] ASI_IMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer
|
|
ldxa [%g0] ASI_IMMU, %g6 ! Get TAG TARGET
|
|
srlx %g6, 48, %g5 ! Get context
|
|
sllx %g6, 22, %g6 ! Zero out context
|
|
brz,pn %g5, kvmap_itlb ! Context 0 processing
|
|
srlx %g6, 22, %g6 ! Delay slot
|
|
TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry
|
|
cmp %g4, %g6 ! Compare TAG
|
|
|
|
/* ITLB ** ICACHE line 2: TSB compare and TLB load */
|
|
bne,pn %xcc, tsb_miss_itlb ! Miss
|
|
mov FAULT_CODE_ITLB, %g3
|
|
sethi %hi(_PAGE_EXEC_4U), %g4
|
|
andcc %g5, %g4, %g0 ! Executable?
|
|
be,pn %xcc, tsb_do_fault
|
|
nop ! Delay slot, fill me
|
|
stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB
|
|
retry ! Trap done
|
|
|
|
/* ITLB ** ICACHE line 3: */
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
/* ITLB ** ICACHE line 4: */
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|