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-rw-r--r--arch/sparc/kernel/misctrap.S95
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 000000000..b5c841775
--- /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