include/asm-i386/mach-default/smpboot_hooks.h

   1 /* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
   2  * which needs to alter them. */
   3
   4 static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
   5 {
   6         CMOS_WRITE(0xa, 0xf);
   7         local_flush_tlb();
   8         Dprintk("1.\n");
   9         *((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4;
  10         Dprintk("2.\n");
  11         *((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
  12         Dprintk("3.\n");
  13 }
  14
  15 static inline void smpboot_restore_warm_reset_vector(void)
  16 {
  17         /*
  18          * Install writable page 0 entry to set BIOS data area.
  19          */
  20         local_flush_tlb();
  21
  22         /*
  23          * Paranoid:  Set warm reset code and vector here back
  24          * to default values.
  25          */
  26         CMOS_WRITE(0, 0xf);
  27
  28         *((volatile long *) phys_to_virt(0x467)) = 0;
  29 }