powerpc/mm: Introduce MMU features

We're soon running out of CPU features and I need to add some new
ones for various MMU related bits, so this patch separates the MMU
features from the CPU features.  I moved over the 32-bit MMU related
ones, added base features for MMU type families, but didn't move
over any 64-bit only feature yet.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/feature-fixups.h b/arch/powerpc/include/asm/feature-fixups.h
index a1029967620b..e4094a5cb05b 100644
--- a/arch/powerpc/include/asm/feature-fixups.h
+++ b/arch/powerpc/include/asm/feature-fixups.h
@@ -81,6 +81,36 @@ label##5:					       	\
 #define ALT_FTR_SECTION_END_IFCLR(msk)  \
         ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
 
+/* MMU feature dependent sections */
+#define BEGIN_MMU_FTR_SECTION_NESTED(label)     START_FTR_SECTION(label)
+#define BEGIN_MMU_FTR_SECTION                   START_FTR_SECTION(97)
+
+#define END_MMU_FTR_SECTION_NESTED(msk, val, label)             \
+        FTR_SECTION_ELSE_NESTED(label)                          \
+        MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
+
+#define END_MMU_FTR_SECTION(msk, val)           \
+        END_MMU_FTR_SECTION_NESTED(msk, val, 97)
+
+#define END_MMU_FTR_SECTION_IFSET(msk)  END_MMU_FTR_SECTION((msk), (msk))
+#define END_MMU_FTR_SECTION_IFCLR(msk)  END_MMU_FTR_SECTION((msk), 0)
+
+/* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
+#define MMU_FTR_SECTION_ELSE_NESTED(label)      FTR_SECTION_ELSE_NESTED(label)
+#define MMU_FTR_SECTION_ELSE    MMU_FTR_SECTION_ELSE_NESTED(97)
+#define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label) \
+        MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
+#define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label)        \
+        ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label)
+#define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label)        \
+        ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label)
+#define ALT_MMU_FTR_SECTION_END(msk, val)       \
+        ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97)
+#define ALT_MMU_FTR_SECTION_END_IFSET(msk)      \
+        ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97)
+#define ALT_MMU_FTR_SECTION_END_IFCLR(msk)      \
+        ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
+
 /* Firmware feature dependent sections */
 #define BEGIN_FW_FTR_SECTION_NESTED(label)      START_FTR_SECTION(label)
 #define BEGIN_FW_FTR_SECTION                    START_FTR_SECTION(97)