powerpc: Add definitions used by exception handling on 64-bit Book3E
This adds various definitions and macros used by the exception and TLB
miss handling on 64-bit BookE
It also adds the definitions of the SPRGs used for various exception types
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index c871533..6315edc 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -652,6 +652,16 @@
* - SPRG2 scratch for exception vectors
* - SPRG3 unused (user visible)
*
+ * 64-bit embedded
+ * - SPRG0 generic exception scratch
+ * - SPRG2 TLB exception stack
+ * - SPRG3 unused (user visible)
+ * - SPRG4 unused (user visible)
+ * - SPRG6 TLB miss scratch (user visible, sorry !)
+ * - SPRG7 critical exception scratch
+ * - SPRG8 machine check exception scratch
+ * - SPRG9 debug exception scratch
+ *
* All 32-bit:
* - SPRG3 current thread_info pointer
* (virtual on BookE, physical on others)
@@ -705,6 +715,15 @@
#define SPRN_SPRG_SCRATCH0 SPRN_SPRG2
#endif
+#ifdef CONFIG_PPC_BOOK3E_64
+#define SPRN_SPRG_MC_SCRATCH SPRN_SPRG8
+#define SPRN_SPRG_CRIT_SCRATCH SPRN_SPRG7
+#define SPRN_SPRG_DBG_SCRATCH SPRN_SPRG9
+#define SPRN_SPRG_TLB_EXFRAME SPRN_SPRG2
+#define SPRN_SPRG_TLB_SCRATCH SPRN_SPRG6
+#define SPRN_SPRG_GEN_SCRATCH SPRN_SPRG0
+#endif
+
#ifdef CONFIG_PPC_BOOK3S_32
#define SPRN_SPRG_SCRATCH0 SPRN_SPRG0
#define SPRN_SPRG_SCRATCH1 SPRN_SPRG1