arch/x86/include/asm/trampoline.h

   1 #ifndef _ASM_X86_TRAMPOLINE_H
   2 #define _ASM_X86_TRAMPOLINE_H
   3
   4 #ifndef __ASSEMBLY__
   5
   6 #include <linux/types.h>
   7 #include <asm/io.h>
   8
   9 /*
  10  * Trampoline 80x86 program as an array.  These are in the init rodata
  11  * segment, but that's okay, because we only care about the relative
  12  * addresses of the symbols.
  13  */
  14 extern const unsigned char x86_trampoline_start [];
  15 extern const unsigned char x86_trampoline_end   [];
  16 extern unsigned char *x86_trampoline_base;
  17
  18 extern unsigned long init_rsp;
  19 extern unsigned long initial_code;
  20 extern unsigned long initial_gs;
  21
  22 extern void __init setup_trampolines(void);
  23
  24 extern const unsigned char trampoline_data[];
  25 extern const unsigned char trampoline_status[];
  26
  27 #define TRAMPOLINE_SYM(x)                                               \
  28         ((void *)(x86_trampoline_base +                                 \
  29                   ((const unsigned char *)(x) - x86_trampoline_start)))
  30
  31 /* Address of the SMP trampoline */
  32 static inline unsigned long trampoline_address(void)
  33 {
  34         return virt_to_phys(TRAMPOLINE_SYM(trampoline_data));
  35 }
  36
  37 #endif /* __ASSEMBLY__ */
  38
  39 #endif /* _ASM_X86_TRAMPOLINE_H */