arch/parisc/include/asm/jump_label.h

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