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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> | |
12 | ||
13 | static inline int delay_slot(struct pt_regs *regs) | |
14 | { | |
15 | return regs->cp0_cause & CAUSEF_BD; | |
16 | } | |
17 | ||
18 | static inline unsigned long exception_epc(struct pt_regs *regs) | |
19 | { | |
20 | if (!delay_slot(regs)) | |
21 | return regs->cp0_epc; | |
22 | ||
23 | return regs->cp0_epc + 4; | |
24 | } | |
25 | ||
26 | extern int __compute_return_epc(struct pt_regs *regs); | |
27 | ||
28 | static inline int compute_return_epc(struct pt_regs *regs) | |
29 | { | |
30 | if (!delay_slot(regs)) { | |
31 | regs->cp0_epc += 4; | |
32 | return 0; | |
33 | } | |
34 | ||
35 | return __compute_return_epc(regs); | |
36 | } | |
37 | ||
38 | #endif /* _ASM_BRANCH_H */ |