powerpc: Enable MMU feature sections for inline asm

powerpc: Enable MMU feature sections for inline asm

This adds the ability to do MMU feature sections for inline asm.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 20 insertions, 5 deletions

diff --git a/arch/powerpc/include/asm/feature-fixups.h b/arch/powerpc/include/asm/feature-fixups.h
index e4094a5cb05b..cbd4dfa4bce2 100644
--- a/arch/powerpc/include/asm/feature-fixups.h
+++ b/arch/powerpc/include/asm/feature-fixups.h
@@ -8,8 +8,6 @@
  * 2 of the License, or (at your option) any later version.
  */
 
-#ifdef __ASSEMBLY__
-
 /*
  * Feature section common macros
  *
@@ -23,10 +21,12 @@
 /* 64 bits kernel, 32 bits code (ie. vdso32) */
 #define FTR_ENTRY_LONG          .llong
 #define FTR_ENTRY_OFFSET        .long 0xffffffff; .long
+#elif defined(CONFIG_PPC64)
+#define FTR_ENTRY_LONG          .llong
+#define FTR_ENTRY_OFFSET        .llong
 #else
-/* 64 bit kernel 64 bit code, or 32 bit kernel 32 bit code */
-#define FTR_ENTRY_LONG          PPC_LONG
-#define FTR_ENTRY_OFFSET        PPC_LONG
+#define FTR_ENTRY_LONG          .long
+#define FTR_ENTRY_OFFSET        .long
 #endif
 
 #define START_FTR_SECTION(label)        label##1:
@@ -141,6 +141,21 @@ label##5:					       	\
 #define ALT_FW_FTR_SECTION_END_IFCLR(msk)       \
         ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
 
+#ifndef __ASSEMBLY__
+
+#define ASM_MMU_FTR_IF(section_if, section_else, msk, val)      \
+        stringify_in_c(BEGIN_MMU_FTR_SECTION)                   \
+        section_if "; "                                         \
+        stringify_in_c(MMU_FTR_SECTION_ELSE)                    \
+        section_else "; "                                       \
+        stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val)))
+
+#define ASM_MMU_FTR_IFSET(section_if, section_else, msk)        \
+        ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk))
+
+#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk)        \
+        ASM_MMU_FTR_IF(section_if, section_else, (msk), 0)
+
 #endif /* __ASSEMBLY__ */
 
 /* LWSYNC feature sections */