MIPS: Add function for flushing the TLB using the TLBINV instruction

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6136/

diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 0558f9b..d9910a1 100644 (file)
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -705,6 +705,19 @@ static inline int mm_insn_16bit(u16 insn)
 }
 
 /*
+ * TLB Invalidate Flush
+ */
+static inline void tlbinvf(void)
+{
+       __asm__ __volatile__(
+               ".set push\n\t"
+               ".set noreorder\n\t"
+               ".word 0x42000004\n\t" /* tlbinvf */
+               ".set pop");
+}
+
+
+/*
  * Functions to access the R10000 performance counters.         These are basically
  * mfc0 and mtc0 instructions from and to coprocessor register with a 5-bit
  * performance counter number encoded into bits 1 ... 5 of the instruction.