LXR linux/arch/sparc/kernel/jump

   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
  13void 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
  42