[MIPS] PMC MSP71xx mips common

Patch to add mips common support for the PMC-Sierra MSP71xx devices.

Signed-off-by: Marc St-Jean <Marc_St-Jean@pmc-sierra.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/include/asm-mips/mipsregs.h b/include/asm-mips/mipsregs.h
index 668db02c2804..706b3691f57e 100644
--- a/include/asm-mips/mipsregs.h
+++ b/include/asm-mips/mipsregs.h
@@ -15,6 +15,7 @@
 
 #include <linux/linkage.h>
 #include <asm/hazards.h>
+#include <asm/war.h>
 
 /*
  * The following macros are especially useful for __asm__
@@ -537,6 +538,9 @@
 
 #define MIPS_CONF7_WII          (_ULCAST_(1) << 31)
 
+#define MIPS_CONF7_RPS          (_ULCAST_(1) << 2)
+
+
 /*
  * Bits in the MIPS32/64 coprocessor 1 (FPU) revision register.
  */
@@ -1298,10 +1302,39 @@ static inline void tlb_probe(void)
 
 static inline void tlb_read(void)
 {
+#if MIPS34K_MISSED_ITLB_WAR
+        int res = 0;
+
+        __asm__ __volatile__(
+        "       .set    push                                    \n"
+        "       .set    noreorder                               \n"
+        "       .set    noat                                    \n"
+        "       .set    mips32r2                                \n"
+        "       .word   0x41610001              # dvpe $1       \n"
+        "       move    %0, $1                                  \n"
+        "       ehb                                             \n"
+        "       .set    pop                                     \n"
+        : "=r" (res));
+
+        instruction_hazard();
+#endif
+
         __asm__ __volatile__(
                 ".set noreorder\n\t"
                 "tlbr\n\t"
                 ".set reorder");
+
+#if MIPS34K_MISSED_ITLB_WAR
+        if ((res & _ULCAST_(1)))
+                __asm__ __volatile__(
+                "       .set    push                            \n"
+                "       .set    noreorder                       \n"
+                "       .set    noat                            \n"
+                "       .set    mips32r2                        \n"
+                "       .word   0x41600021      # evpe          \n"
+                "       ehb                                     \n"
+                "       .set    pop                             \n");
+#endif
 }
 
 static inline void tlb_write_indexed(void)