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btfixup.h

/*
 *  asm/btfixup.h:    Macros for boot time linking.
 *
 *  Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 */
 
#ifndef _SPARC_BTFIXUP_H
#define _SPARC_BTFIXUP_H

#include <linux/init.h>

#ifndef __ASSEMBLY__

#ifdef MODULE
extern unsigned int ___illegal_use_of_BTFIXUP_SIMM13_in_module(void);
extern unsigned int ___illegal_use_of_BTFIXUP_SETHI_in_module(void);
extern unsigned int ___illegal_use_of_BTFIXUP_HALF_in_module(void);
extern unsigned int ___illegal_use_of_BTFIXUP_INT_in_module(void);

#define BTFIXUP_SIMM13(__name) ___illegal_use_of_BTFIXUP_SIMM13_in_module()
#define BTFIXUP_HALF(__name) ___illegal_use_of_BTFIXUP_HALF_in_module()
#define BTFIXUP_SETHI(__name) ___illegal_use_of_BTFIXUP_SETHI_in_module()
#define BTFIXUP_INT(__name) ___illegal_use_of_BTFIXUP_INT_in_module()
#define BTFIXUP_BLACKBOX(__name) ___illegal_use_of_BTFIXUP_BLACKBOX_in_module

#else

#define BTFIXUP_SIMM13(__name) ___sf_##__name()
#define BTFIXUP_HALF(__name) ___af_##__name()
#define BTFIXUP_SETHI(__name) ___hf_##__name()
#define BTFIXUP_INT(__name) ((unsigned int)&___i_##__name)
/* This must be written in assembly and present in a sethi */
#define BTFIXUP_BLACKBOX(__name) ___b_##__name
#endif /* MODULE */

/* Fixup call xx */

#define BTFIXUPDEF_CALL(__type, __name, __args...)                            \
      extern __type ___f_##__name(__args);                                    \
      extern unsigned ___fs_##__name[3];
#define BTFIXUPDEF_CALL_CONST(__type, __name, __args...)                      \
      extern __type ___f_##__name(__args) __attribute_const__;                \
      extern unsigned ___fs_##__name[3];
#define BTFIXUP_CALL(__name) ___f_##__name

#define BTFIXUPDEF_BLACKBOX(__name)                                     \
      extern unsigned ___bs_##__name[2];

/* Put bottom 13bits into some register variable */

#define BTFIXUPDEF_SIMM13(__name)                                       \
      static inline unsigned int ___sf_##__name(void) __attribute_const__;          \
      extern unsigned ___ss_##__name[2];                                \
      static inline unsigned int ___sf_##__name(void) {                       \
            unsigned int ret;                                     \
            __asm__ ("or %%g0, ___s_" #__name ", %0" : "=r"(ret));                  \
            return ret;                                           \
      }
#define BTFIXUPDEF_SIMM13_INIT(__name,__val)                                  \
      static inline unsigned int ___sf_##__name(void) __attribute_const__;          \
      extern unsigned ___ss_##__name[2];                                \
      static inline unsigned int ___sf_##__name(void) {                       \
            unsigned int ret;                                     \
            __asm__ ("or %%g0, ___s_" #__name "__btset_" #__val ", %0" : "=r"(ret));\
            return ret;                                           \
      }

/* Put either bottom 13 bits, or upper 22 bits into some register variable
 * (depending on the value, this will lead into sethi FIX, reg; or
 * mov FIX, reg; )
 */

#define BTFIXUPDEF_HALF(__name)                                               \
      static inline unsigned int ___af_##__name(void) __attribute_const__;          \
      extern unsigned ___as_##__name[2];                                \
      static inline unsigned int ___af_##__name(void) {                       \
            unsigned int ret;                                     \
            __asm__ ("or %%g0, ___a_" #__name ", %0" : "=r"(ret));                  \
            return ret;                                           \
      }
#define BTFIXUPDEF_HALF_INIT(__name,__val)                                    \
      static inline unsigned int ___af_##__name(void) __attribute_const__;          \
      extern unsigned ___as_##__name[2];                                \
      static inline unsigned int ___af_##__name(void) {                       \
            unsigned int ret;                                     \
            __asm__ ("or %%g0, ___a_" #__name "__btset_" #__val ", %0" : "=r"(ret));\
            return ret;                                           \
      }

/* Put upper 22 bits into some register variable */

#define BTFIXUPDEF_SETHI(__name)                                        \
      static inline unsigned int ___hf_##__name(void) __attribute_const__;          \
      extern unsigned ___hs_##__name[2];                                \
      static inline unsigned int ___hf_##__name(void) {                       \
            unsigned int ret;                                     \
            __asm__ ("sethi %%hi(___h_" #__name "), %0" : "=r"(ret));         \
            return ret;                                           \
      }
#define BTFIXUPDEF_SETHI_INIT(__name,__val)                                   \
      static inline unsigned int ___hf_##__name(void) __attribute_const__;          \
      extern unsigned ___hs_##__name[2];                                \
      static inline unsigned int ___hf_##__name(void) {                       \
            unsigned int ret;                                     \
            __asm__ ("sethi %%hi(___h_" #__name "__btset_" #__val "), %0" :   \
                   "=r"(ret));                                          \
            return ret;                                           \
      }

/* Put a full 32bit integer into some register variable */

#define BTFIXUPDEF_INT(__name)                                                \
      extern unsigned char ___i_##__name;                               \
      extern unsigned ___is_##__name[2];

#define BTFIXUPCALL_NORM      0x00000000              /* Always call */
#define BTFIXUPCALL_NOP       0x01000000              /* Possibly optimize to nop */
#define BTFIXUPCALL_RETINT(i) (0x90102000|((i) & 0x1fff))   /* Possibly optimize to mov i, %o0 */
#define BTFIXUPCALL_ORINT(i)  (0x90122000|((i) & 0x1fff))   /* Possibly optimize to or %o0, i, %o0 */
#define BTFIXUPCALL_RETO0     0x01000000              /* Return first parameter, actually a nop */
#define BTFIXUPCALL_ANDNINT(i)      (0x902a2000|((i) & 0x1fff))   /* Possibly optimize to andn %o0, i, %o0 */
#define BTFIXUPCALL_SWAPO0O1  0xd27a0000              /* Possibly optimize to swap [%o0],%o1 */
#define BTFIXUPCALL_SWAPO0G0  0xc07a0000              /* Possibly optimize to swap [%o0],%g0 */
#define BTFIXUPCALL_SWAPG1G2  0xc4784000              /* Possibly optimize to swap [%g1],%g2 */
#define BTFIXUPCALL_STG0O0    0xc0220000              /* Possibly optimize to st %g0,[%o0] */
#define BTFIXUPCALL_STO1O0    0xd2220000              /* Possibly optimize to st %o1,[%o0] */

#define BTFIXUPSET_CALL(__name, __addr, __insn)                               \
      do {                                                        \
            ___fs_##__name[0] |= 1;                                     \
            ___fs_##__name[1] = (unsigned long)__addr;                        \
            ___fs_##__name[2] = __insn;                                 \
      } while (0)
      
#define BTFIXUPSET_BLACKBOX(__name, __func)                                   \
      do {                                                        \
            ___bs_##__name[0] |= 1;                                     \
            ___bs_##__name[1] = (unsigned long)__func;                        \
      } while (0)
      
#define BTFIXUPCOPY_CALL(__name, __from)                                \
      do {                                                        \
            ___fs_##__name[0] |= 1;                                     \
            ___fs_##__name[1] = ___fs_##__from[1];                            \
            ___fs_##__name[2] = ___fs_##__from[2];                            \
      } while (0)
            
#define BTFIXUPSET_SIMM13(__name, __val)                                \
      do {                                                        \
            ___ss_##__name[0] |= 1;                                     \
            ___ss_##__name[1] = (unsigned)__val;                              \
      } while (0)
      
#define BTFIXUPCOPY_SIMM13(__name, __from)                                    \
      do {                                                        \
            ___ss_##__name[0] |= 1;                                     \
            ___ss_##__name[1] = ___ss_##__from[1];                            \
      } while (0)
            
#define BTFIXUPSET_HALF(__name, __val)                                        \
      do {                                                        \
            ___as_##__name[0] |= 1;                                     \
            ___as_##__name[1] = (unsigned)__val;                              \
      } while (0)
      
#define BTFIXUPCOPY_HALF(__name, __from)                                \
      do {                                                        \
            ___as_##__name[0] |= 1;                                     \
            ___as_##__name[1] = ___as_##__from[1];                            \
      } while (0)
            
#define BTFIXUPSET_SETHI(__name, __val)                                       \
      do {                                                        \
            ___hs_##__name[0] |= 1;                                     \
            ___hs_##__name[1] = (unsigned)__val;                              \
      } while (0)
      
#define BTFIXUPCOPY_SETHI(__name, __from)                               \
      do {                                                        \
            ___hs_##__name[0] |= 1;                                     \
            ___hs_##__name[1] = ___hs_##__from[1];                            \
      } while (0)
            
#define BTFIXUPSET_INT(__name, __val)                                         \
      do {                                                        \
            ___is_##__name[0] |= 1;                                     \
            ___is_##__name[1] = (unsigned)__val;                              \
      } while (0)
      
#define BTFIXUPCOPY_INT(__name, __from)                                       \
      do {                                                        \
            ___is_##__name[0] |= 1;                                     \
            ___is_##__name[1] = ___is_##__from[1];                            \
      } while (0)
      
#define BTFIXUPVAL_CALL(__name)                                               \
      ((unsigned long)___fs_##__name[1])
      
extern void btfixup(void);

#else /* __ASSEMBLY__ */

#define BTFIXUP_SETHI(__name)             %hi(___h_ ## __name)
#define BTFIXUP_SETHI_INIT(__name,__val)  %hi(___h_ ## __name ## __btset_ ## __val)

#endif /* __ASSEMBLY__ */
      
#endif /* !(_SPARC_BTFIXUP_H) */

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