powerpc: Add new code patching routines

This commit adds some new routines for patching code, which will be used
in a following commit.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/asm-powerpc/code-patching.h b/include/asm-powerpc/code-patching.h
index a45a7ff78725..40ad46b1dd9d 100644
--- a/include/asm-powerpc/code-patching.h
+++ b/include/asm-powerpc/code-patching.h
@@ -23,9 +23,17 @@
 
 unsigned int create_branch(const unsigned int *addr,
                            unsigned long target, int flags);
+unsigned int create_cond_branch(const unsigned int *addr,
+                                unsigned long target, int flags);
 void patch_branch(unsigned int *addr, unsigned long target, int flags);
 void patch_instruction(unsigned int *addr, unsigned int instr);
 
+int instr_is_relative_branch(unsigned int instr);
+int instr_is_branch_to_addr(const unsigned int *instr, unsigned long addr);
+unsigned long branch_target(const unsigned int *instr);
+unsigned int translate_branch(const unsigned int *dest,
+                              const unsigned int *src);
+
 static inline unsigned long ppc_function_entry(void *func)
 {
 #ifdef CONFIG_PPC64