arch/x86/kernel/trampoline.c

   1 #include <linux/io.h>
   2
   3 #include <asm/trampoline.h>
   4
   5 /* ready for x86_64, no harm for x86, since it will overwrite after alloc */
   6 unsigned char *trampoline_base = __va(TRAMPOLINE_BASE);
   7
   8 /*
   9  * Currently trivial. Write the real->protected mode
  10  * bootstrap into the page concerned. The caller
  11  * has made sure it's suitably aligned.
  12  */
  13 unsigned long setup_trampoline(void)
  14 {
  15         memcpy(trampoline_base, trampoline_data,
  16                trampoline_end - trampoline_data);
  17         return virt_to_phys(trampoline_base);
  18 }