include/asm-powerpc/asm-compat.h

   1 #ifndef _ASM_POWERPC_ASM_COMPAT_H
   2 #define _ASM_POWERPC_ASM_COMPAT_H
   3
   4 #include <asm/types.h>
   5
   6 #ifdef __ASSEMBLY__
   7 #  define stringify_in_c(...)   __VA_ARGS__
   8 #  define ASM_CONST(x)          x
   9 #else
  10 /* This version of stringify will deal with commas... */
  11 #  define __stringify_in_c(...) #__VA_ARGS__
  12 #  define stringify_in_c(...)   __stringify_in_c(__VA_ARGS__) " "
  13 #  define __ASM_CONST(x)        x##UL
  14 #  define ASM_CONST(x)          __ASM_CONST(x)
  15 #endif
  16
  17
  18 /*
  19  * Feature section common macros
  20  *
  21  * Note that the entries now contain offsets between the table entry
  22  * and the code rather than absolute code pointers in order to be
  23  * useable with the vdso shared library. There is also an assumption
  24  * that values will be negative, that is, the fixup table has to be
  25  * located after the code it fixes up.
  26  */
  27 #ifdef CONFIG_PPC64
  28 #ifdef __powerpc64__
  29 /* 64 bits kernel, 64 bits code */
  30 #define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect)   \
  31 99:                                                     \
  32         .section sect,"a";                              \
  33         .align 3;                                       \
  34 98:                                                     \
  35         .llong msk;                                     \
  36         .llong val;                                     \
  37         .llong label##b-98b;                            \
  38         .llong 99b-98b;                                 \
  39         .previous
  40 #else /* __powerpc64__ */
  41 /* 64 bits kernel, 32 bits code (ie. vdso32) */
  42 #define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect)   \
  43 99:                                                     \
  44         .section sect,"a";                              \
  45         .align 3;                                       \
  46 98:                                                     \
  47         .llong msk;                                     \
  48         .llong val;                                     \
  49         .long 0xffffffff;                               \
  50         .long label##b-98b;                             \
  51         .long 0xffffffff;                               \
  52         .long 99b-98b;                                  \
  53         .previous
  54 #endif /* !__powerpc64__ */
  55 #else /* CONFIG_PPC64 */
  56 /* 32 bits kernel, 32 bits code */
  57 #define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect)   \
  58 99:                                                     \
  59         .section sect,"a";                              \
  60         .align 2;                                       \
  61 98:                                                     \
  62         .long msk;                                      \
  63         .long val;                                      \
  64         .long label##b-98b;                             \
  65         .long 99b-98b;                                  \
  66         .previous
  67 #endif /* !CONFIG_PPC64 */
  68
  69 #ifdef __powerpc64__
  70
  71 /* operations for longs and pointers */
  72 #define PPC_LL          stringify_in_c(ld)
  73 #define PPC_STL         stringify_in_c(std)
  74 #define PPC_LCMPI       stringify_in_c(cmpdi)
  75 #define PPC_LONG        stringify_in_c(.llong)
  76 #define PPC_TLNEI       stringify_in_c(tdnei)
  77 #define PPC_LLARX       stringify_in_c(ldarx)
  78 #define PPC_STLCX       stringify_in_c(stdcx.)
  79 #define PPC_CNTLZL      stringify_in_c(cntlzd)
  80
  81 /* Move to CR, single-entry optimized version. Only available
  82  * on POWER4 and later.
  83  */
  84 #ifdef CONFIG_POWER4_ONLY
  85 #define PPC_MTOCRF      stringify_in_c(mtocrf)
  86 #else
  87 #define PPC_MTOCRF      stringify_in_c(mtcrf)
  88 #endif
  89
  90 #else /* 32-bit */
  91
  92 /* operations for longs and pointers */
  93 #define PPC_LL          stringify_in_c(lwz)
  94 #define PPC_STL         stringify_in_c(stw)
  95 #define PPC_LCMPI       stringify_in_c(cmpwi)
  96 #define PPC_LONG        stringify_in_c(.long)
  97 #define PPC_TLNEI       stringify_in_c(twnei)
  98 #define PPC_LLARX       stringify_in_c(lwarx)
  99 #define PPC_STLCX       stringify_in_c(stwcx.)
 100 #define PPC_CNTLZL      stringify_in_c(cntlzw)
 101 #define PPC_MTOCRF      stringify_in_c(mtcrf)
 102
 103 #endif
 104
 105 #ifdef __KERNEL__
 106 #ifdef CONFIG_IBM405_ERR77
 107 /* Erratum #77 on the 405 means we need a sync or dcbt before every
 108  * stwcx.  The old ATOMIC_SYNC_FIX covered some but not all of this.
 109  */
 110 #define PPC405_ERR77(ra,rb)     stringify_in_c(dcbt     ra, rb;)
 111 #define PPC405_ERR77_SYNC       stringify_in_c(sync;)
 112 #else
 113 #define PPC405_ERR77(ra,rb)
 114 #define PPC405_ERR77_SYNC
 115 #endif
 116 #endif
 117
 118 #endif /* _ASM_POWERPC_ASM_COMPAT_H */