powerpc: Consolidate CPU and firmware feature fixup macros
The CPU and firmware feature fixup macros are currently spread across
three files, firmware.h, cputable.h and asm-compat.h. Consolidate them
into their own file, feature-fixups.h
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/include/asm-powerpc/feature-fixups.h b/include/asm-powerpc/feature-fixups.h
new file mode 100644
index 0000000..8597212
--- /dev/null
+++ b/include/asm-powerpc/feature-fixups.h
@@ -0,0 +1,102 @@
+#ifndef __ASM_POWERPC_FEATURE_FIXUPS_H
+#define __ASM_POWERPC_FEATURE_FIXUPS_H
+
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifdef __ASSEMBLY__
+
+/*
+ * Feature section common macros
+ *
+ * Note that the entries now contain offsets between the table entry
+ * and the code rather than absolute code pointers in order to be
+ * useable with the vdso shared library. There is also an assumption
+ * that values will be negative, that is, the fixup table has to be
+ * located after the code it fixes up.
+ */
+#ifdef CONFIG_PPC64
+
+#ifdef __powerpc64__
+
+/* 64 bits kernel, 64 bits code */
+#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \
+99: \
+ .section sect,"a"; \
+ .align 3; \
+98: \
+ .llong msk; \
+ .llong val; \
+ .llong label##b-98b; \
+ .llong 99b-98b; \
+ .previous
+
+#else /* __powerpc64__ */
+
+/* 64 bits kernel, 32 bits code (ie. vdso32) */
+#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \
+99: \
+ .section sect,"a"; \
+ .align 3; \
+98: \
+ .llong msk; \
+ .llong val; \
+ .long 0xffffffff; \
+ .long label##b-98b; \
+ .long 0xffffffff; \
+ .long 99b-98b; \
+ .previous
+
+#endif /* !__powerpc64__ */
+
+#else /* CONFIG_PPC64 */
+
+/* 32 bits kernel, 32 bits code */
+#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \
+99: \
+ .section sect,"a"; \
+ .align 2; \
+98: \
+ .long msk; \
+ .long val; \
+ .long label##b-98b; \
+ .long 99b-98b; \
+ .previous
+
+#endif /* !CONFIG_PPC64 */
+
+
+/* CPU feature dependent sections */
+#define BEGIN_FTR_SECTION_NESTED(label) label:
+#define BEGIN_FTR_SECTION BEGIN_FTR_SECTION_NESTED(97)
+
+#define END_FTR_SECTION_NESTED(msk, val, label) \
+ MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
+
+#define END_FTR_SECTION(msk, val) \
+ END_FTR_SECTION_NESTED(msk, val, 97)
+
+#define END_FTR_SECTION_IFSET(msk) END_FTR_SECTION((msk), (msk))
+#define END_FTR_SECTION_IFCLR(msk) END_FTR_SECTION((msk), 0)
+
+
+/* Firmware feature dependent sections */
+#define BEGIN_FW_FTR_SECTION_NESTED(label) label:
+#define BEGIN_FW_FTR_SECTION BEGIN_FW_FTR_SECTION_NESTED(97)
+
+#define END_FW_FTR_SECTION_NESTED(msk, val, label) \
+ MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
+
+#define END_FW_FTR_SECTION(msk, val) \
+ END_FW_FTR_SECTION_NESTED(msk, val, 97)
+
+#define END_FW_FTR_SECTION_IFSET(msk) END_FW_FTR_SECTION((msk), (msk))
+#define END_FW_FTR_SECTION_IFCLR(msk) END_FW_FTR_SECTION((msk), 0)
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */