include/asm/jump_label.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002
0003 #ifndef __ASM_CSKY_JUMP_LABEL_H
0004 #define __ASM_CSKY_JUMP_LABEL_H
0005
0006 #ifndef __ASSEMBLY__
0007
0008 #include <linux/types.h>
0009
0010 #define JUMP_LABEL_NOP_SIZE 4
0011
0012 static __always_inline bool arch_static_branch(struct static_key *key,
0013                            bool branch)
0014 {
0015     asm_volatile_goto(
0016         "1: nop32                   \n"
0017         "   .pushsection    __jump_table, \"aw\"    \n"
0018         "   .align      2           \n"
0019         "   .long       1b - ., %l[label] - .   \n"
0020         "   .long       %0 - .          \n"
0021         "   .popsection             \n"
0022         :  :  "i"(&((char *)key)[branch]) :  : label);
0023
0024     return false;
0025 label:
0026     return true;
0027 }
0028
0029 static __always_inline bool arch_static_branch_jump(struct static_key *key,
0030                             bool branch)
0031 {
0032     asm_volatile_goto(
0033         "1: bsr32       %l[label]       \n"
0034         "   .pushsection    __jump_table, \"aw\"    \n"
0035         "   .align      2           \n"
0036         "   .long       1b - ., %l[label] - .   \n"
0037         "   .long       %0 - .          \n"
0038         "   .popsection             \n"
0039         :  :  "i"(&((char *)key)[branch]) :  : label);
0040
0041     return false;
0042 label:
0043     return true;
0044 }
0045
0046 #endif  /* __ASSEMBLY__ */
0047 #endif  /* __ASM_CSKY_JUMP_LABEL_H */