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-rw-r--r--arch/xtensa/kernel/coprocessor.S25
1 files changed, 23 insertions, 2 deletions
diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S
index 54c3be313bfa..647657484866 100644
--- a/arch/xtensa/kernel/coprocessor.S
+++ b/arch/xtensa/kernel/coprocessor.S
@@ -43,10 +43,13 @@
/* IO protection is currently unsupported. */
ENTRY(fast_io_protect)
+
wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
+ENDPROC(fast_io_protect)
+
#if XTENSA_HAVE_COPROCESSORS
/*
@@ -139,6 +142,7 @@ ENTRY(fast_io_protect)
*/
ENTRY(coprocessor_save)
+
entry a1, 32
s32i a0, a1, 0
movi a0, .Lsave_cp_regs_jump_table
@@ -150,7 +154,10 @@ ENTRY(coprocessor_save)
1: l32i a0, a1, 0
retw
+ENDPROC(coprocessor_save)
+
ENTRY(coprocessor_load)
+
entry a1, 32
s32i a0, a1, 0
movi a0, .Lload_cp_regs_jump_table
@@ -162,8 +169,10 @@ ENTRY(coprocessor_load)
1: l32i a0, a1, 0
retw
+ENDPROC(coprocessor_load)
+
/*
- * coprocessor_flush(struct task_info*, index)
+ * coprocessor_flush(struct task_info*, index)
* a2 a3
* coprocessor_restore(struct task_info*, index)
* a2 a3
@@ -178,6 +187,7 @@ ENTRY(coprocessor_load)
ENTRY(coprocessor_flush)
+
entry a1, 32
s32i a0, a1, 0
movi a0, .Lsave_cp_regs_jump_table
@@ -191,6 +201,8 @@ ENTRY(coprocessor_flush)
1: l32i a0, a1, 0
retw
+ENDPROC(coprocessor_flush)
+
ENTRY(coprocessor_restore)
entry a1, 32
s32i a0, a1, 0
@@ -205,6 +217,8 @@ ENTRY(coprocessor_restore)
1: l32i a0, a1, 0
retw
+ENDPROC(coprocessor_restore)
+
/*
* Entry condition:
*
@@ -220,10 +234,12 @@ ENTRY(coprocessor_restore)
*/
ENTRY(fast_coprocessor_double)
+
wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
+ENDPROC(fast_coprocessor_double)
ENTRY(fast_coprocessor)
@@ -327,9 +343,14 @@ ENTRY(fast_coprocessor)
rfe
+ENDPROC(fast_coprocessor)
+
.data
+
ENTRY(coprocessor_owner)
+
.fill XCHAL_CP_MAX, 4, 0
-#endif /* XTENSA_HAVE_COPROCESSORS */
+END(coprocessor_owner)
+#endif /* XTENSA_HAVE_COPROCESSORS */
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