arch/sparc/kernel/jump_label.c

   1 #include <linux/kernel.h>
   2 #include <linux/types.h>
   3 #include <linux/mutex.h>
   4 #include <linux/cpu.h>
   5
   6 #include <linux/jump_label.h>
   7 #include <linux/memory.h>
   8
   9 #include <asm/cacheflush.h>
  10
  11 #ifdef HAVE_JUMP_LABEL
  12
  13 void arch_jump_label_transform(struct jump_entry *entry,
  14                                enum jump_label_type type)
  15 {
  16         u32 val;
  17         u32 *insn = (u32 *) (unsigned long) entry->code;
  18
  19         if (type == JUMP_LABEL_ENABLE) {
  20                 s32 off = (s32)entry->target - (s32)entry->code;
  21
  22 #ifdef CONFIG_SPARC64
  23                 /* ba,pt %xcc, . + (off << 2) */
  24                 val = 0x10680000 | ((u32) off >> 2);
  25 #else
  26                 /* ba . + (off << 2) */
  27                 val = 0x10800000 | ((u32) off >> 2);
  28 #endif
  29         } else {
  30                 val = 0x01000000;
  31         }
  32
  33         get_online_cpus();
  34         mutex_lock(&text_mutex);
  35         *insn = val;
  36         flushi(insn);
  37         mutex_unlock(&text_mutex);
  38         put_online_cpus();
  39 }
  40
  41 #endif