diff options
Diffstat (limited to 'arch/sparc/kernel/misctrap.S')
| -rw-r--r-- | arch/sparc/kernel/misctrap.S | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/sparc/kernel/misctrap.S b/arch/sparc/kernel/misctrap.S new file mode 100644 index 0000000000..b5c8417752 --- /dev/null +++ b/arch/sparc/kernel/misctrap.S @@ -0,0 +1,95 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifdef CONFIG_KGDB + .globl arch_kgdb_breakpoint + .type arch_kgdb_breakpoint,#function +arch_kgdb_breakpoint: + ta 0x72 + retl + nop + .size arch_kgdb_breakpoint,.-arch_kgdb_breakpoint +#endif + + .type __do_privact,#function +__do_privact: + mov TLB_SFSR, %g3 + stxa %g0, [%g3] ASI_DMMU ! Clear FaultValid bit + membar #Sync + sethi %hi(109f), %g7 + ba,pt %xcc, etrap +109: or %g7, %lo(109b), %g7 + call do_privact + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap + .size __do_privact,.-__do_privact + + .type do_mna,#function +do_mna: + rdpr %tl, %g3 + cmp %g3, 1 + + /* Setup %g4/%g5 now as they are used in the + * winfixup code. + */ + mov TLB_SFSR, %g3 + mov DMMU_SFAR, %g4 + ldxa [%g4] ASI_DMMU, %g4 + ldxa [%g3] ASI_DMMU, %g5 + stxa %g0, [%g3] ASI_DMMU ! Clear FaultValid bit + membar #Sync + bgu,pn %icc, winfix_mna + rdpr %tpc, %g3 + +1: sethi %hi(109f), %g7 + ba,pt %xcc, etrap +109: or %g7, %lo(109b), %g7 + mov %l4, %o1 + mov %l5, %o2 + call mem_address_unaligned + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap + .size do_mna,.-do_mna + + .type do_lddfmna,#function +do_lddfmna: + sethi %hi(109f), %g7 + mov TLB_SFSR, %g4 + ldxa [%g4] ASI_DMMU, %g5 + stxa %g0, [%g4] ASI_DMMU ! Clear FaultValid bit + membar #Sync + mov DMMU_SFAR, %g4 + ldxa [%g4] ASI_DMMU, %g4 + ba,pt %xcc, etrap +109: or %g7, %lo(109b), %g7 + mov %l4, %o1 + mov %l5, %o2 + call handle_lddfmna + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap + .size do_lddfmna,.-do_lddfmna + + .type do_stdfmna,#function +do_stdfmna: + sethi %hi(109f), %g7 + mov TLB_SFSR, %g4 + ldxa [%g4] ASI_DMMU, %g5 + stxa %g0, [%g4] ASI_DMMU ! Clear FaultValid bit + membar #Sync + mov DMMU_SFAR, %g4 + ldxa [%g4] ASI_DMMU, %g4 + ba,pt %xcc, etrap +109: or %g7, %lo(109b), %g7 + mov %l4, %o1 + mov %l5, %o2 + call handle_stdfmna + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap + nop + .size do_stdfmna,.-do_stdfmna + + .type breakpoint_trap,#function +breakpoint_trap: + call sparc_breakpoint + add %sp, PTREGS_OFF, %o0 + ba,pt %xcc, rtrap + nop + .size breakpoint_trap,.-breakpoint_trap |