powerpc: Convert some mftb/mftbu into mfspr

[karo-tx-linux.git] / arch / powerpc / include / asm / reg.h

diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 55b03079d197590504b491a94ab2376e20a2ec52..64264bf601f5bdf8e077b093e7083aa4aecee20f 100644 (file)
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1120,7 +1120,7 @@
 #if defined(CONFIG_PPC_CELL) || defined(CONFIG_PPC_FSL_BOOK3E)
 #define mftb()         ({unsigned long rval;                           \
                        asm volatile(                                   \
-                               "90:    mftb %0;\n"                     \
+                               "90:    mfspr %0, %2;\n"                \
                                "97:    cmpwi %0,0;\n"                  \
                                "       beq- 90b;\n"                    \
                                "99:\n"                                 \
@@ -1134,18 +1134,23 @@
                                "       .llong 0\n"                     \
                                "       .llong 0\n"                     \
                                ".previous"                             \
-                       : "=r" (rval) : "i" (CPU_FTR_CELL_TB_BUG)); rval;})
+                       : "=r" (rval) \
+                       : "i" (CPU_FTR_CELL_TB_BUG), "i" (SPRN_TBRL)); \
+                       rval;})
 #else
 #define mftb()         ({unsigned long rval;   \
-                       asm volatile("mftb %0" : "=r" (rval)); rval;})
+                       asm volatile("mfspr %0, %1" : \
+                                    "=r" (rval) : "i" (SPRN_TBRL)); rval;})
 #endif /* !CONFIG_PPC_CELL */
 
 #else /* __powerpc64__ */
 
 #define mftbl()                ({unsigned long rval;   \
-                       asm volatile("mftbl %0" : "=r" (rval)); rval;})
+                       asm volatile("mfspr %0, %1" : "=r" (rval) : \
+                               "i" (SPRN_TBRL)); rval;})
 #define mftbu()                ({unsigned long rval;   \
-                       asm volatile("mftbu %0" : "=r" (rval)); rval;})
+                       asm volatile("mfspr %0, %1" : "=r" (rval) : \
+                               "i" (SPRN_TBRU)); rval;})
 #endif /* !__powerpc64__ */
 
 #define mttbl(v)       asm volatile("mttbl %0":: "r"(v))