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   1 /*
   2  *  asm-sparc/btfixup.h:    Macros for boot time linking.
   3  *
   4  *  Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  */
   6
   7 #ifndef _SPARC_BTFIXUP_H
   8 #define _SPARC_BTFIXUP_H
   9
  10 #include <linux/init.h>
  11
  12 #ifndef __ASSEMBLY__
  13
  14 #ifdef MODULE
  15 extern unsigned int ___illegal_use_of_BTFIXUP_SIMM13_in_module(void);
  16 extern unsigned int ___illegal_use_of_BTFIXUP_SETHI_in_module(void);
  17 extern unsigned int ___illegal_use_of_BTFIXUP_HALF_in_module(void);
  18 extern unsigned int ___illegal_use_of_BTFIXUP_INT_in_module(void);
  19
  20 #define BTFIXUP_SIMM13(__name) ___illegal_use_of_BTFIXUP_SIMM13_in_module()
  21 #define BTFIXUP_HALF(__name) ___illegal_use_of_BTFIXUP_HALF_in_module()
  22 #define BTFIXUP_SETHI(__name) ___illegal_use_of_BTFIXUP_SETHI_in_module()
  23 #define BTFIXUP_INT(__name) ___illegal_use_of_BTFIXUP_INT_in_module()
  24 #define BTFIXUP_BLACKBOX(__name) ___illegal_use_of_BTFIXUP_BLACKBOX_in_module
  25
  26 #else
  27
  28 #define BTFIXUP_SIMM13(__name) ___sf_##__name()
  29 #define BTFIXUP_HALF(__name) ___af_##__name()
  30 #define BTFIXUP_SETHI(__name) ___hf_##__name()
  31 #define BTFIXUP_INT(__name) ((unsigned int)&___i_##__name)
  32 /* This must be written in assembly and present in a sethi */
  33 #define BTFIXUP_BLACKBOX(__name) ___b_##__name
  34 #endif /* MODULE */
  35
  36 /* Fixup call xx */
  37
  38 #define BTFIXUPDEF_CALL(__type, __name, __args...)                                      \
  39         extern __type ___f_##__name(__args);                                            \
  40         extern unsigned ___fs_##__name[3];
  41 #define BTFIXUPDEF_CALL_CONST(__type, __name, __args...)                                \
  42         extern __type ___f_##__name(__args) __attribute_const__;                        \
  43         extern unsigned ___fs_##__name[3];
  44 #define BTFIXUP_CALL(__name) ___f_##__name
  45
  46 #define BTFIXUPDEF_BLACKBOX(__name)                                                     \
  47         extern unsigned ___bs_##__name[2];
  48
  49 /* Put bottom 13bits into some register variable */
  50
  51 #define BTFIXUPDEF_SIMM13(__name)                                                       \
  52         static inline unsigned int ___sf_##__name(void) __attribute_const__;            \
  53         extern unsigned ___ss_##__name[2];                                              \
  54         static inline unsigned int ___sf_##__name(void) {                               \
  55                 unsigned int ret;                                                       \
  56                 __asm__ ("or %%g0, ___s_" #__name ", %0" : "=r"(ret));                  \
  57                 return ret;                                                             \
  58         }
  59 #define BTFIXUPDEF_SIMM13_INIT(__name,__val)                                            \
  60         static inline unsigned int ___sf_##__name(void) __attribute_const__;            \
  61         extern unsigned ___ss_##__name[2];                                              \
  62         static inline unsigned int ___sf_##__name(void) {                               \
  63                 unsigned int ret;                                                       \
  64                 __asm__ ("or %%g0, ___s_" #__name "__btset_" #__val ", %0" : "=r"(ret));\
  65                 return ret;                                                             \
  66         }
  67
  68 /* Put either bottom 13 bits, or upper 22 bits into some register variable
  69  * (depending on the value, this will lead into sethi FIX, reg; or
  70  * mov FIX, reg; )
  71  */
  72
  73 #define BTFIXUPDEF_HALF(__name)                                                         \
  74         static inline unsigned int ___af_##__name(void) __attribute_const__;            \
  75         extern unsigned ___as_##__name[2];                                              \
  76         static inline unsigned int ___af_##__name(void) {                               \
  77                 unsigned int ret;                                                       \
  78                 __asm__ ("or %%g0, ___a_" #__name ", %0" : "=r"(ret));                  \
  79                 return ret;                                                             \
  80         }
  81 #define BTFIXUPDEF_HALF_INIT(__name,__val)                                              \
  82         static inline unsigned int ___af_##__name(void) __attribute_const__;            \
  83         extern unsigned ___as_##__name[2];                                              \
  84         static inline unsigned int ___af_##__name(void) {                               \
  85                 unsigned int ret;                                                       \
  86                 __asm__ ("or %%g0, ___a_" #__name "__btset_" #__val ", %0" : "=r"(ret));\
  87                 return ret;                                                             \
  88         }
  89
  90 /* Put upper 22 bits into some register variable */
  91
  92 #define BTFIXUPDEF_SETHI(__name)                                                        \
  93         static inline unsigned int ___hf_##__name(void) __attribute_const__;            \
  94         extern unsigned ___hs_##__name[2];                                              \
  95         static inline unsigned int ___hf_##__name(void) {                               \
  96                 unsigned int ret;                                                       \
  97                 __asm__ ("sethi %%hi(___h_" #__name "), %0" : "=r"(ret));               \
  98                 return ret;                                                             \
  99         }
 100 #define BTFIXUPDEF_SETHI_INIT(__name,__val)                                             \
 101         static inline unsigned int ___hf_##__name(void) __attribute_const__;            \
 102         extern unsigned ___hs_##__name[2];                                              \
 103         static inline unsigned int ___hf_##__name(void) {                               \
 104                 unsigned int ret;                                                       \
 105                 __asm__ ("sethi %%hi(___h_" #__name "__btset_" #__val "), %0" :         \
 106                          "=r"(ret));                                                    \
 107                 return ret;                                                             \
 108         }
 109
 110 /* Put a full 32bit integer into some register variable */
 111
 112 #define BTFIXUPDEF_INT(__name)                                                          \
 113         extern unsigned char ___i_##__name;                                             \
 114         extern unsigned ___is_##__name[2];
 115
 116 #define BTFIXUPCALL_NORM        0x00000000                      /* Always call */
 117 #define BTFIXUPCALL_NOP         0x01000000                      /* Possibly optimize to nop */
 118 #define BTFIXUPCALL_RETINT(i)   (0x90102000|((i) & 0x1fff))     /* Possibly optimize to mov i, %o0 */
 119 #define BTFIXUPCALL_ORINT(i)    (0x90122000|((i) & 0x1fff))     /* Possibly optimize to or %o0, i, %o0 */
 120 #define BTFIXUPCALL_RETO0       0x01000000                      /* Return first parameter, actually a nop */
 121 #define BTFIXUPCALL_ANDNINT(i)  (0x902a2000|((i) & 0x1fff))     /* Possibly optimize to andn %o0, i, %o0 */
 122 #define BTFIXUPCALL_SWAPO0O1    0xd27a0000                      /* Possibly optimize to swap [%o0],%o1 */
 123 #define BTFIXUPCALL_SWAPO0G0    0xc07a0000                      /* Possibly optimize to swap [%o0],%g0 */
 124 #define BTFIXUPCALL_SWAPG1G2    0xc4784000                      /* Possibly optimize to swap [%g1],%g2 */
 125 #define BTFIXUPCALL_STG0O0      0xc0220000                      /* Possibly optimize to st %g0,[%o0] */
 126 #define BTFIXUPCALL_STO1O0      0xd2220000                      /* Possibly optimize to st %o1,[%o0] */
 127
 128 #define BTFIXUPSET_CALL(__name, __addr, __insn)                                         \
 129         do {                                                                            \
 130                 ___fs_##__name[0] |= 1;                                                 \
 131                 ___fs_##__name[1] = (unsigned long)__addr;                              \
 132                 ___fs_##__name[2] = __insn;                                             \
 133         } while (0)
 134
 135 #define BTFIXUPSET_BLACKBOX(__name, __func)                                             \
 136         do {                                                                            \
 137                 ___bs_##__name[0] |= 1;                                                 \
 138                 ___bs_##__name[1] = (unsigned long)__func;                              \
 139         } while (0)
 140
 141 #define BTFIXUPCOPY_CALL(__name, __from)                                                \
 142         do {                                                                            \
 143                 ___fs_##__name[0] |= 1;                                                 \
 144                 ___fs_##__name[1] = ___fs_##__from[1];                                  \
 145                 ___fs_##__name[2] = ___fs_##__from[2];                                  \
 146         } while (0)
 147
 148 #define BTFIXUPSET_SIMM13(__name, __val)                                                \
 149         do {                                                                            \
 150                 ___ss_##__name[0] |= 1;                                                 \
 151                 ___ss_##__name[1] = (unsigned)__val;                                    \
 152         } while (0)
 153
 154 #define BTFIXUPCOPY_SIMM13(__name, __from)                                              \
 155         do {                                                                            \
 156                 ___ss_##__name[0] |= 1;                                                 \
 157                 ___ss_##__name[1] = ___ss_##__from[1];                                  \
 158         } while (0)
 159
 160 #define BTFIXUPSET_HALF(__name, __val)                                                  \
 161         do {                                                                            \
 162                 ___as_##__name[0] |= 1;                                                 \
 163                 ___as_##__name[1] = (unsigned)__val;                                    \
 164         } while (0)
 165
 166 #define BTFIXUPCOPY_HALF(__name, __from)                                                \
 167         do {                                                                            \
 168                 ___as_##__name[0] |= 1;                                                 \
 169                 ___as_##__name[1] = ___as_##__from[1];                                  \
 170         } while (0)
 171
 172 #define BTFIXUPSET_SETHI(__name, __val)                                                 \
 173         do {                                                                            \
 174                 ___hs_##__name[0] |= 1;                                                 \
 175                 ___hs_##__name[1] = (unsigned)__val;                                    \
 176         } while (0)
 177
 178 #define BTFIXUPCOPY_SETHI(__name, __from)                                               \
 179         do {                                                                            \
 180                 ___hs_##__name[0] |= 1;                                                 \
 181                 ___hs_##__name[1] = ___hs_##__from[1];                                  \
 182         } while (0)
 183
 184 #define BTFIXUPSET_INT(__name, __val)                                                   \
 185         do {                                                                            \
 186                 ___is_##__name[0] |= 1;                                                 \
 187                 ___is_##__name[1] = (unsigned)__val;                                    \
 188         } while (0)
 189
 190 #define BTFIXUPCOPY_INT(__name, __from)                                                 \
 191         do {                                                                            \
 192                 ___is_##__name[0] |= 1;                                                 \
 193                 ___is_##__name[1] = ___is_##__from[1];                                  \
 194         } while (0)
 195
 196 #define BTFIXUPVAL_CALL(__name)                                                         \
 197         ((unsigned long)___fs_##__name[1])
 198
 199 extern void btfixup(void);
 200
 201 #else /* __ASSEMBLY__ */
 202
 203 #define BTFIXUP_SETHI(__name)                   %hi(___h_ ## __name)
 204 #define BTFIXUP_SETHI_INIT(__name,__val)        %hi(___h_ ## __name ## __btset_ ## __val)
 205
 206 #endif /* __ASSEMBLY__ */
 207
 208 #endif /* !(_SPARC_BTFIXUP_H) */