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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1996, 1997, 1998, 2001 by Ralf Baechle
7 */
8#ifndef _ASM_BRANCH_H
9#define _ASM_BRANCH_H
10
11#include <asm/ptrace.h>
12#include <asm/inst.h>
13
14static inline int delay_slot(struct pt_regs *regs)
15{
16 return regs->cp0_cause & CAUSEF_BD;
17}
18
19static inline unsigned long exception_epc(struct pt_regs *regs)
20{
21 if (!delay_slot(regs))
22 return regs->cp0_epc;
23
24 return regs->cp0_epc + 4;
25}
26
27#define BRANCH_LIKELY_TAKEN 0x0001
28
29extern int __compute_return_epc(struct pt_regs *regs);
30extern int __compute_return_epc_for_insn(struct pt_regs *regs,
31 union mips_instruction insn);
32
33static inline int compute_return_epc(struct pt_regs *regs)
34{
35 if (!delay_slot(regs)) {
36 regs->cp0_epc += 4;
37 return 0;
38 }
39
40 return __compute_return_epc(regs);
41}
42
43#endif /* _ASM_BRANCH_H */