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arch
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asm
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irqflags.h

irqflags.h 1.7 KB
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  1. #ifndef _ASM_SCORE_IRQFLAGS_H
    2. 

  2. #define _ASM_SCORE_IRQFLAGS_H
    3. 

  3. 

  4. #ifndef __ASSEMBLY__
    5. 

  5. 

  6. #define raw_local_irq_save(x)			\
    7. 

  7. {						\
    8. 

  8. 	__asm__ __volatile__(			\
    9. 

  9. 		"mfcr	r8, cr0;"		\
    10. 

  10. 		"li	r9, 0xfffffffe;"	\
    11. 

  11. 		"nop;"				\
    12. 

  12. 		"mv	%0, r8;"		\
    13. 

  13. 		"and	r8, r8, r9;"		\
    14. 

  14. 		"mtcr	r8, cr0;"		\
    15. 

  15. 		"nop;"				\
    16. 

  16. 		"nop;"				\
    17. 

  17. 		"nop;"				\
    18. 

  18. 		"nop;"				\
    19. 

  19. 		"nop;"				\
    20. 

  20. 		: "=r" (x)			\
    21. 

  21. 		:				\
    22. 

  22. 		: "r8", "r9"			\
    23. 

  23. 		);				\
    24. 

  24. }
    25. 

  25. 

  26. #define raw_local_irq_restore(x)		\
    27. 

  27. {						\
    28. 

  28. 	__asm__ __volatile__(			\
    29. 

  29. 		"mfcr	r8, cr0;"		\
    30. 

  30. 		"ldi	r9, 0x1;"		\
    31. 

  31. 		"and	%0, %0, r9;"		\
    32. 

  32. 		"or	r8, r8, %0;"		\
    33. 

  33. 		"mtcr	r8, cr0;"		\
    34. 

  34. 		"nop;"				\
    35. 

  35. 		"nop;"				\
    36. 

  36. 		"nop;"				\
    37. 

  37. 		"nop;"				\
    38. 

  38. 		"nop;"				\
    39. 

  39. 		:				\
    40. 

  40. 		: "r"(x)			\
    41. 

  41. 		: "r8", "r9"			\
    42. 

  42. 		);				\
    43. 

  43. }
    44. 

  44. 

  45. #define raw_local_irq_enable(void)		\
    46. 

  46. {						\
    47. 

  47. 	__asm__ __volatile__(			\
    48. 

  48. 		"mfcr\tr8,cr0;"			\
    49. 

  49. 		"nop;"				\
    50. 

  50. 		"nop;"				\
    51. 

  51. 		"ori\tr8,0x1;"			\
    52. 

  52. 		"mtcr\tr8,cr0;"			\
    53. 

  53. 		"nop;"				\
    54. 

  54. 		"nop;"				\
    55. 

  55. 		"nop;"				\
    56. 

  56. 		"nop;"				\
    57. 

  57. 		"nop;"				\
    58. 

  58. 		:				\
    59. 

  59. 		:				\
    60. 

  60. 		: "r8");			\
    61. 

  61. }
    62. 

  62. 

  63. #define raw_local_irq_disable(void)		\
    64. 

  64. {						\
    65. 

  65. 	__asm__ __volatile__(			\
    66. 

  66. 		"mfcr\tr8,cr0;"			\
    67. 

  67. 		"nop;"				\
    68. 

  68. 		"nop;"				\
    69. 

  69. 		"srli\tr8,r8,1;"		\
    70. 

  70. 		"slli\tr8,r8,1;"		\
    71. 

  71. 		"mtcr\tr8,cr0;"			\
    72. 

  72. 		"nop;"				\
    73. 

  73. 		"nop;"				\
    74. 

  74. 		"nop;"				\
    75. 

  75. 		"nop;"				\
    76. 

  76. 		"nop;"				\
    77. 

  77. 		:				\
    78. 

  78. 		:				\
    79. 

  79. 		: "r8");			\
    80. 

  80. }
    81. 

  81. 

  82. #define raw_local_save_flags(x)			\
    83. 

  83. {						\
    84. 

  84. 	__asm__ __volatile__(			\
    85. 

  85. 		"mfcr	r8, cr0;"		\
    86. 

  86. 		"nop;"				\
    87. 

  87. 		"nop;"				\
    88. 

  88. 		"mv	%0, r8;"		\
    89. 

  89. 		"nop;"				\
    90. 

  90. 		"nop;"				\
    91. 

  91. 		"nop;"				\
    92. 

  92. 		"nop;"				\
    93. 

  93. 		"nop;"				\
    94. 

  94. 		"ldi	r9, 0x1;"		\
    95. 

  95. 		"and	%0, %0, r9;"		\
    96. 

  96. 		: "=r" (x)			\
    97. 

  97. 		:				\
    98. 

  98. 		: "r8", "r9"			\
    99. 

  99. 		);				\
    100. 

  100. }
    101. 

  101. 

  102. static inline int raw_irqs_disabled_flags(unsigned long flags)
    103. 

  103. {
    104. 

  104. 	return !(flags & 1);
    105. 

  105. }
    106. 

  106. 

  107. #endif
    108. 

  108. 

  109. #endif /* _ASM_SCORE_IRQFLAGS_H */
    110.