From aaddd3eacaeaef3503035750b3f21ac2bfe97cbf Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 24 Jun 2008 11:32:21 +1000 Subject: powerpc: Move code patching code into arch/powerpc/lib/code-patching.c We currently have a few routines for patching code in asm/system.h, because they didn't fit anywhere else. I'd like to clean them up a little and add some more, so first move them into a dedicated C file - they don't need to be inlined. While we're moving the code, drop create_function_call(), it's intended caller never got merged and will be replaced in future with something different. Signed-off-by: Michael Ellerman Acked-by: Kumar Gala Signed-off-by: Paul Mackerras --- include/asm-powerpc/code-patching.h | 25 +++++++++++++++++++ include/asm-powerpc/system.h | 48 ------------------------------------- 2 files changed, 25 insertions(+), 48 deletions(-) create mode 100644 include/asm-powerpc/code-patching.h (limited to 'include/asm-powerpc') diff --git a/include/asm-powerpc/code-patching.h b/include/asm-powerpc/code-patching.h new file mode 100644 index 00000000000..0b91fdf944d --- /dev/null +++ b/include/asm-powerpc/code-patching.h @@ -0,0 +1,25 @@ +#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. + */ + +/* 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 + +extern void create_branch(unsigned long addr, unsigned long target, int flags); +extern void create_instruction(unsigned long addr, unsigned int instr); + +#endif /* _ASM_POWERPC_CODE_PATCHING_H */ diff --git a/include/asm-powerpc/system.h b/include/asm-powerpc/system.h index 145b70f6d22..2642a92b724 100644 --- a/include/asm-powerpc/system.h +++ b/include/asm-powerpc/system.h @@ -526,54 +526,6 @@ extern void reloc_got2(unsigned long); #define PTRRELOC(x) ((typeof(x)) add_reloc_offset((unsigned long)(x))) -static inline void create_instruction(unsigned long addr, unsigned int instr) -{ - unsigned int *p; - p = (unsigned int *)addr; - *p = instr; - asm ("dcbst 0, %0; sync; icbi 0,%0; sync; isync" : : "r" (p)); -} - -/* 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 - -static inline void create_branch(unsigned long addr, - unsigned long target, int flags) -{ - unsigned int instruction; - - if (! (flags & BRANCH_ABSOLUTE)) - target = target - addr; - - /* Mask out the flags and target, so they don't step on each other. */ - instruction = 0x48000000 | (flags & 0x3) | (target & 0x03FFFFFC); - - create_instruction(addr, instruction); -} - -static inline void create_function_call(unsigned long addr, void * func) -{ - unsigned long func_addr; - -#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. - */ - func_addr = *(unsigned long *)func; -#else - func_addr = (unsigned long)func; -#endif - create_branch(addr, func_addr, BRANCH_SET_LINK); -} - #ifdef CONFIG_VIRT_CPU_ACCOUNTING extern void account_system_vtime(struct task_struct *); #endif -- cgit v1.2.3