Home Explore Help
Register Sign In
phyus
/
linux-vybrid_public
8
0
Fork 0
Files Issues 0 Pull Requests 0 Wiki
Tree: f2c7ea10f9
Branches Tags
linux-vybrid_pu...
/
arch
/
mips
/
include
/
asm
/
branch.h

branch.h 951 B
History Raw

12345678910111213141516171819202122232425262728293031323334353637383940414243 
  1. /*
    2. 

  2.  * This file is subject to the terms and conditions of the GNU General Public
    3. 

  3.  * License.  See the file "COPYING" in the main directory of this archive
    4. 

  4.  * for more details.
    5. 

  5.  *
    6. 

  6.  * Copyright (C) 1996, 1997, 1998, 2001 by Ralf Baechle
    7. 

  7.  */
    8. 

  8. #ifndef _ASM_BRANCH_H
    9. 

  9. #define _ASM_BRANCH_H
    10. 

  10. 

  11. #include <asm/ptrace.h>
    12. 

  12. #include <asm/inst.h>
    13. 

  13. 

  14. static inline int delay_slot(struct pt_regs *regs)
    15. 

  15. {
    16. 

  16. 	return regs->cp0_cause & CAUSEF_BD;
    17. 

  17. }
    18. 

  18. 

  19. static inline unsigned long exception_epc(struct pt_regs *regs)
    20. 

  20. {
    21. 

  21. 	if (!delay_slot(regs))
    22. 

  22. 		return regs->cp0_epc;
    23. 

  23. 

  24. 	return regs->cp0_epc + 4;
    25. 

  25. }
    26. 

  26. 

  27. #define BRANCH_LIKELY_TAKEN 0x0001
    28. 

  28. 

  29. extern int __compute_return_epc(struct pt_regs *regs);
    30. 

  30. extern int __compute_return_epc_for_insn(struct pt_regs *regs,
    31. 

  31. 					 union mips_instruction insn);
    32. 

  32. 

  33. static inline int compute_return_epc(struct pt_regs *regs)
    34. 

  34. {
    35. 

  35. 	if (!delay_slot(regs)) {
    36. 

  36. 		regs->cp0_epc += 4;
    37. 

  37. 		return 0;
    38. 

  38. 	}
    39. 

  39. 

  40. 	return __compute_return_epc(regs);
    41. 

  41. }
    42. 

  42. 

  43. #endif /* _ASM_BRANCH_H */
    44.