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linux-vybrid_pu...
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arch
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blackfin
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include
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asm
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entry.h

entry.h 2.0 KB
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  1. #ifndef __BFIN_ENTRY_H
    2. 

  2. #define __BFIN_ENTRY_H
    3. 

  3. 

  4. #include <asm/setup.h>
    5. 

  5. #include <asm/page.h>
    6. 

  6. 

  7. #ifdef __ASSEMBLY__
    8. 

  8. 

  9. #define	LFLUSH_I_AND_D	0x00000808
    10. 

  10. #define	LSIGTRAP	5
    11. 

  11. 

  12. /* process bits for task_struct.flags */
    13. 

  13. #define	PF_TRACESYS_OFF	3
    14. 

  14. #define	PF_TRACESYS_BIT	5
    15. 

  15. #define	PF_PTRACED_OFF	3
    16. 

  16. #define	PF_PTRACED_BIT	4
    17. 

  17. #define	PF_DTRACE_OFF	1
    18. 

  18. #define	PF_DTRACE_BIT	5
    19. 

  19. 

  20. /*
    21. 

  21.  * NOTE!  The single-stepping code assumes that all interrupt handlers
    22. 

  22.  * start by saving SYSCFG on the stack with their first instruction.
    23. 

  23.  */
    24. 

  24. 

  25. /* This one is used for exceptions, emulation, and NMI.  It doesn't push
    26. 

  26.    RETI and doesn't do cli.  */
    27. 

  27. #define SAVE_ALL_SYS		save_context_no_interrupts
    28. 

  28. /* This is used for all normal interrupts.  It saves a minimum of registers
    29. 

  29.    to the stack, loads the IRQ number, and jumps to common code.  */
    30. 

  30. #ifdef CONFIG_IPIPE
    31. 

  31. # define LOAD_IPIPE_IPEND \
    32. 

  32. 	P0.l = lo(IPEND); \
    33. 

  33. 	P0.h = hi(IPEND); \
    34. 

  34. 	R1 = [P0];
    35. 

  35. #else
    36. 

  36. # define LOAD_IPIPE_IPEND
    37. 

  37. #endif
    38. 

  38. #define INTERRUPT_ENTRY(N)						\
    39. 

  39.     [--sp] = SYSCFG;							\
    40. 

  40. 									\
    41. 

  41.     [--sp] = P0;	/*orig_p0*/					\
    42. 

  42.     [--sp] = R0;	/*orig_r0*/					\
    43. 

  43.     [--sp] = (R7:0,P5:0);						\
    44. 

  44.     R0 = (N);								\
    45. 

  45.     LOAD_IPIPE_IPEND							\
    46. 

  46.     jump __common_int_entry;
    47. 

  47. 

  48. /* For timer interrupts, we need to save IPEND, since the user_mode
    49. 

  49. 	   macro accesses it to determine where to account time.  */
    50. 

  50. #define TIMER_INTERRUPT_ENTRY(N)					\
    51. 

  51.     [--sp] = SYSCFG;							\
    52. 

  52. 									\
    53. 

  53.     [--sp] = P0;	/*orig_p0*/					\
    54. 

  54.     [--sp] = R0;	/*orig_r0*/					\
    55. 

  55.     [--sp] = (R7:0,P5:0);						\
    56. 

  56.     p0.l = lo(IPEND);							\
    57. 

  57.     p0.h = hi(IPEND);							\
    58. 

  58.     r1 = [p0];								\
    59. 

  59.     R0 = (N);								\
    60. 

  60.     jump __common_int_entry;
    61. 

  61. 

  62. /* This one pushes RETI without using CLI.  Interrupts are enabled.  */
    63. 

  63. #define SAVE_CONTEXT_SYSCALL	save_context_syscall
    64. 

  64. #define SAVE_CONTEXT		save_context_with_interrupts
    65. 

  65. #define SAVE_CONTEXT_CPLB	save_context_cplb
    66. 

  66. 

  67. #define RESTORE_ALL_SYS		restore_context_no_interrupts
    68. 

  68. #define RESTORE_CONTEXT		restore_context_with_interrupts
    69. 

  69. #define RESTORE_CONTEXT_CPLB	restore_context_cplb
    70. 

  70. 

  71. #endif				/* __ASSEMBLY__ */
    72. 

  72. #endif				/* __BFIN_ENTRY_H */
    73.