2 * Copyright 2008 Michael Ellerman, IBM Corporation.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
10 #include <linux/kernel.h>
11 #include <asm/code-patching.h>
14 void create_instruction(unsigned long addr, unsigned int instr)
17 p = (unsigned int *)addr;
19 asm ("dcbst 0, %0; sync; icbi 0,%0; sync; isync" : : "r" (p));
22 void create_branch(unsigned long addr, unsigned long target, int flags)
24 unsigned int instruction;
26 if (! (flags & BRANCH_ABSOLUTE))
27 target = target - addr;
29 /* Mask out the flags and target, so they don't step on each other. */
30 instruction = 0x48000000 | (flags & 0x3) | (target & 0x03FFFFFC);
32 create_instruction(addr, instruction);