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1da177e4 LT |
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> | |
d8d4e3ae | 12 | #include <asm/inst.h> |
1da177e4 LT |
13 | |
14 | static inline int delay_slot(struct pt_regs *regs) | |
15 | { | |
16 | return regs->cp0_cause & CAUSEF_BD; | |
17 | } | |
18 | ||
19 | static 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 | ||
d8d4e3ae MS |
27 | #define BRANCH_LIKELY_TAKEN 0x0001 |
28 | ||
1da177e4 | 29 | extern int __compute_return_epc(struct pt_regs *regs); |
d8d4e3ae MS |
30 | extern int __compute_return_epc_for_insn(struct pt_regs *regs, |
31 | union mips_instruction insn); | |
1da177e4 LT |
32 | |
33 | static 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 */ |