aaddd3eaca
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 <michael@ellerman.id.au> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
34 lines
917 B
C
34 lines
917 B
C
/*
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* Copyright 2008 Michael Ellerman, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <asm/code-patching.h>
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void create_instruction(unsigned long addr, unsigned int instr)
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{
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unsigned int *p;
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p = (unsigned int *)addr;
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*p = instr;
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asm ("dcbst 0, %0; sync; icbi 0,%0; sync; isync" : : "r" (p));
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}
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void create_branch(unsigned long addr, unsigned long target, int flags)
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{
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unsigned int instruction;
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if (! (flags & BRANCH_ABSOLUTE))
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target = target - addr;
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/* Mask out the flags and target, so they don't step on each other. */
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instruction = 0x48000000 | (flags & 0x3) | (target & 0x03FFFFFC);
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create_instruction(addr, instruction);
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}
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