powerpc: Add support for early tlbilx opcode

During the ISA 2.06 development the opcode for tlbilx changed and some
early implementations used to old opcode.  Add support for a MMU_FTR
fixup to deal with this.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 16 insertions, 1 deletions

diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index cbf154387091..86d2366ab6a1 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -52,6 +52,12 @@
  */
 #define MMU_FTR_NEED_DTLB_SW_LRU        ASM_CONST(0x00200000)
 
+/* This indicates that the processor uses the wrong opcode for tlbilx
+ * instructions.  During the ISA 2.06 development the opcode for tlbilx
+ * changed and some early implementations used to old opcode
+ */
+#define MMU_FTR_TLBILX_EARLY_OPCODE     ASM_CONST(0x00400000)
+
 #ifndef __ASSEMBLY__
 #include <asm/cputable.h>
 
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index 640ccbbc0977..ef4da37f3c10 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -44,6 +44,7 @@
 #define PPC_INST_STSWI                  0x7c0005aa
 #define PPC_INST_STSWX                  0x7c00052a
 #define PPC_INST_TLBILX                 0x7c000024
+#define PPC_INST_TLBILX_EARLY           0x7c000626
 #define PPC_INST_WAIT                   0x7c00007c
 
 /* macros to insert fields into opcodes */
@@ -63,10 +64,18 @@
 #define PPC_RFDI                stringify_in_c(.long PPC_INST_RFDI)
 #define PPC_RFMCI               stringify_in_c(.long PPC_INST_RFMCI)
 #define PPC_TLBILX(t, a, b)     stringify_in_c(.long PPC_INST_TLBILX | \
-                                        __PPC_T_TLB(t) | __PPC_RA(a) | __PPC_RB(b))
+                                        __PPC_T_TLB(t) | \
+                                        __PPC_RA(a) | __PPC_RB(b))
 #define PPC_TLBILX_ALL(a, b)    PPC_TLBILX(0, a, b)
 #define PPC_TLBILX_PID(a, b)    PPC_TLBILX(1, a, b)
 #define PPC_TLBILX_VA(a, b)     PPC_TLBILX(3, a, b)
+
+#define PPC_TLBILX_EARLY(t, a, b) stringify_in_c(.long PPC_INST_TLBILX_EARLY | \
+                                                __PPC_T_TLB(t) | \
+                                                __PPC_RA(a) | __PPC_RB(b))
+#define PPC_TLBILX_ALL_EARLY(a, b)      PPC_TLBILX_EARLY(0, a, b)
+#define PPC_TLBILX_PID_EARLY(a, b)      PPC_TLBILX_EARLY(1, a, b)
+#define PPC_TLBILX_VA_EARLY(a, b)       PPC_TLBILX_EARLY(3, a, b)
 #define PPC_WAIT(w)             stringify_in_c(.long PPC_INST_WAIT | \
                                         __PPC_WC(w))