#ifndef _ASM_POWERPC_CODE_PATCHING_H#define _ASM_POWERPC_CODE_PATCHING_H /* * Copyright 2008, Michael Ellerman, IBM Corporation. * * 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. */ #include <asm/types.h>#include <asm/ppc-opcode.h> /* Flags for create_branch: * "b"   == create_branch(addr, target, 0); * "ba"  == create_branch(addr, target, BRANCH_ABSOLUTE); * "bl"  == create_branch(addr, target, BRANCH_SET_LINK); * "bla" == create_branch(addr, target, BRANCH_ABSOLUTE | BRANCH_SET_LINK); */#define BRANCH_SET_LINK	0x1#define BRANCH_ABSOLUTE	0x2 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	/*	 * On PPC64 the function pointer actually points to the function's	 * descriptor. The first entry in the descriptor is the address	 * of the function text.	 */	return ((func_descr_t *)func)->entry;#else	return (unsigned long)func;#endif} #endif /* _ASM_POWERPC_CODE_PATCHING_H */