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C/C++ Source or Header  |  2008-12-24  |  4.3 KB  |  127 lines
  1. #ifndef __ASM_POWERPC_FEATURE_FIXUPS_H
  2. #define __ASM_POWERPC_FEATURE_FIXUPS_H
  3.  
  4. /*
  5.  * This program is free software; you can redistribute it and/or
  6.  * modify it under the terms of the GNU General Public License
  7.  * as published by the Free Software Foundation; either version
  8.  * 2 of the License, or (at your option) any later version.
  9.  */
  10.  
  11. #ifdef __ASSEMBLY__
  12.  
  13. /*
  14.  * Feature section common macros
  15.  *
  16.  * Note that the entries now contain offsets between the table entry
  17.  * and the code rather than absolute code pointers in order to be
  18.  * useable with the vdso shared library. There is also an assumption
  19.  * that values will be negative, that is, the fixup table has to be
  20.  * located after the code it fixes up.
  21.  */
  22. #if defined(CONFIG_PPC64) && !defined(__powerpc64__)
  23. /* 64 bits kernel, 32 bits code (ie. vdso32) */
  24. #define FTR_ENTRY_LONG        .llong
  25. #define FTR_ENTRY_OFFSET    .long 0xffffffff; .long
  26. #else
  27. /* 64 bit kernel 64 bit code, or 32 bit kernel 32 bit code */
  28. #define FTR_ENTRY_LONG        PPC_LONG
  29. #define FTR_ENTRY_OFFSET    PPC_LONG
  30. #endif
  31.  
  32. #define START_FTR_SECTION(label)    label##1:
  33.  
  34. #define FTR_SECTION_ELSE_NESTED(label)            \
  35. label##2:                        \
  36.     .pushsection __ftr_alt_##label,"a";        \
  37.     .align 2;                    \
  38. label##3:
  39.  
  40. #define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect)    \
  41. label##4:                        \
  42.     .popsection;                    \
  43.     .pushsection sect,"a";                \
  44.     .align 3;                    \
  45. label##5:                               \
  46.     FTR_ENTRY_LONG msk;                \
  47.     FTR_ENTRY_LONG val;                \
  48.     FTR_ENTRY_OFFSET label##1b-label##5b;        \
  49.     FTR_ENTRY_OFFSET label##2b-label##5b;         \
  50.     FTR_ENTRY_OFFSET label##3b-label##5b;        \
  51.     FTR_ENTRY_OFFSET label##4b-label##5b;         \
  52.     .popsection;
  53.  
  54.  
  55. /* CPU feature dependent sections */
  56. #define BEGIN_FTR_SECTION_NESTED(label)    START_FTR_SECTION(label)
  57. #define BEGIN_FTR_SECTION        START_FTR_SECTION(97)
  58.  
  59. #define END_FTR_SECTION_NESTED(msk, val, label)         \
  60.     FTR_SECTION_ELSE_NESTED(label)                \
  61.     MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
  62.  
  63. #define END_FTR_SECTION(msk, val)        \
  64.     END_FTR_SECTION_NESTED(msk, val, 97)
  65.  
  66. #define END_FTR_SECTION_IFSET(msk)    END_FTR_SECTION((msk), (msk))
  67. #define END_FTR_SECTION_IFCLR(msk)    END_FTR_SECTION((msk), 0)
  68.  
  69. /* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
  70. #define FTR_SECTION_ELSE    FTR_SECTION_ELSE_NESTED(97)
  71. #define ALT_FTR_SECTION_END_NESTED(msk, val, label)    \
  72.     MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
  73. #define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label)    \
  74.     ALT_FTR_SECTION_END_NESTED(msk, msk, label)
  75. #define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label)    \
  76.     ALT_FTR_SECTION_END_NESTED(msk, 0, label)
  77. #define ALT_FTR_SECTION_END(msk, val)    \
  78.     ALT_FTR_SECTION_END_NESTED(msk, val, 97)
  79. #define ALT_FTR_SECTION_END_IFSET(msk)    \
  80.     ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97)
  81. #define ALT_FTR_SECTION_END_IFCLR(msk)    \
  82.     ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
  83.  
  84. /* Firmware feature dependent sections */
  85. #define BEGIN_FW_FTR_SECTION_NESTED(label)    START_FTR_SECTION(label)
  86. #define BEGIN_FW_FTR_SECTION            START_FTR_SECTION(97)
  87.  
  88. #define END_FW_FTR_SECTION_NESTED(msk, val, label)         \
  89.     FTR_SECTION_ELSE_NESTED(label)                \
  90.     MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
  91.  
  92. #define END_FW_FTR_SECTION(msk, val)        \
  93.     END_FW_FTR_SECTION_NESTED(msk, val, 97)
  94.  
  95. #define END_FW_FTR_SECTION_IFSET(msk)    END_FW_FTR_SECTION((msk), (msk))
  96. #define END_FW_FTR_SECTION_IFCLR(msk)    END_FW_FTR_SECTION((msk), 0)
  97.  
  98. /* Firmware feature sections with alternatives */
  99. #define FW_FTR_SECTION_ELSE_NESTED(label)    FTR_SECTION_ELSE_NESTED(label)
  100. #define FW_FTR_SECTION_ELSE    FTR_SECTION_ELSE_NESTED(97)
  101. #define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label)    \
  102.     MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
  103. #define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label)    \
  104.     ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label)
  105. #define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label)    \
  106.     ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label)
  107. #define ALT_FW_FTR_SECTION_END(msk, val)    \
  108.     ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97)
  109. #define ALT_FW_FTR_SECTION_END_IFSET(msk)    \
  110.     ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97)
  111. #define ALT_FW_FTR_SECTION_END_IFCLR(msk)    \
  112.     ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
  113.  
  114. #endif /* __ASSEMBLY__ */
  115.  
  116. /* LWSYNC feature sections */
  117. #define START_LWSYNC_SECTION(label)    label##1:
  118. #define MAKE_LWSYNC_SECTION_ENTRY(label, sect)        \
  119. label##2:                        \
  120.     .pushsection sect,"a";                \
  121.     .align 2;                    \
  122. label##3:                               \
  123.     .long label##1b-label##3b;            \
  124.     .popsection;
  125.  
  126. #endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */
  127.