projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |