arch/sparc/include/asm/jump_label.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_SPARC_JUMP_LABEL_H
   3 #define _ASM_SPARC_JUMP_LABEL_H
   4
   5 #ifndef __ASSEMBLY__
   6
   7 #include <linux/types.h>
   8
   9 #define JUMP_LABEL_NOP_SIZE 4
  10
  11 static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
  12 {
  13         asm_volatile_goto("1:\n\t"
  14                  "nop\n\t"
  15                  "nop\n\t"
  16                  ".pushsection __jump_table,  \"aw\"\n\t"
  17                  ".align 4\n\t"
  18                  ".word 1b, %l[l_yes], %c0\n\t"
  19                  ".popsection \n\t"
  20                  : :  "i" (&((char *)key)[branch]) : : l_yes);
  21
  22         return false;
  23 l_yes:
  24         return true;
  25 }
  26
  27 static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
  28 {
  29         asm_volatile_goto("1:\n\t"
  30                  "b %l[l_yes]\n\t"
  31                  "nop\n\t"
  32                  ".pushsection __jump_table,  \"aw\"\n\t"
  33                  ".align 4\n\t"
  34                  ".word 1b, %l[l_yes], %c0\n\t"
  35                  ".popsection \n\t"
  36                  : :  "i" (&((char *)key)[branch]) : : l_yes);
  37
  38         return false;
  39 l_yes:
  40         return true;
  41 }
  42
  43 typedef u32 jump_label_t;
  44
  45 struct jump_entry {
  46         jump_label_t code;
  47         jump_label_t target;
  48         jump_label_t key;
  49 };
  50
  51 #endif  /* __ASSEMBLY__ */
  52 #endif