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[MIPS] R2: Instruction hazard barrier.
author
Ralf Baechle
<ralf@linux-mips.org>
Wed, 5 Apr 2006 08:45:45 +0000
(09:45 +0100)
committer
Ralf Baechle
<ralf@linux-mips.org>
Wed, 19 Apr 2006 02:14:22 +0000
(
04:14
+0200)
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/kernel/entry.S
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diff --git
a/arch/mips/kernel/entry.S
b/arch/mips/kernel/entry.S
index
371571f
..
b1939a4
100644
(file)
--- a/
arch/mips/kernel/entry.S
+++ b/
arch/mips/kernel/entry.S
@@
-119,3
+119,18
@@
syscall_exit_work:
li a1, 1
jal do_syscall_trace
b resume_userspace
+
+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_MIPS_MT)
+
+/*
+ * MIPS32R2 Instruction Hazard Barrier - must be called
+ *
+ * For C code use the inline version named instruction_hazard().
+ */
+LEAF(mips_ihb)
+ .set mips32r2
+ jr.hb ra
+ nop
+ END(mips_ihb)
+
+#endif /* CONFIG_CPU_MIPSR2 or CONFIG_MIPS_MT */