arch/csky/include/asm/jump_label.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef __ASM_CSKY_JUMP_LABEL_H
   4 #define __ASM_CSKY_JUMP_LABEL_H
   5
   6 #ifndef __ASSEMBLY__
   7
   8 #include <linux/types.h>
   9
  10 #define JUMP_LABEL_NOP_SIZE 4
  11
  12 static __always_inline bool arch_static_branch(struct static_key *key,
  13                                                bool branch)
  14 {
  15         asm goto(
  16                 "1:     nop32                                   \n"
  17                 "       .pushsection    __jump_table, \"aw\"    \n"
  18                 "       .align          2                       \n"
  19                 "       .long           1b - ., %l[label] - .   \n"
  20                 "       .long           %0 - .                  \n"
  21                 "       .popsection                             \n"
  22                 :  :  "i"(&((char *)key)[branch]) :  : label);
  23
  24         return false;
  25 label:
  26         return true;
  27 }
  28
  29 static __always_inline bool arch_static_branch_jump(struct static_key *key,
  30                                                     bool branch)
  31 {
  32         asm goto(
  33                 "1:     bsr32           %l[label]               \n"
  34                 "       .pushsection    __jump_table, \"aw\"    \n"
  35                 "       .align          2                       \n"
  36                 "       .long           1b - ., %l[label] - .   \n"
  37                 "       .long           %0 - .                  \n"
  38                 "       .popsection                             \n"
  39                 :  :  "i"(&((char *)key)[branch]) :  : label);
  40
  41         return false;
  42 label:
  43         return true;
  44 }
  45
  46 enum jump_label_type;
  47 void arch_jump_label_transform_static(struct jump_entry *entry,
  48                                       enum jump_label_type type);
  49 #define arch_jump_label_transform_static arch_jump_label_transform_static
  50
  51 #endif  /* __ASSEMBLY__ */
  52 #endif  /* __ASM_CSKY_JUMP_LABEL_H */