arch/x86/include/asm/numaq/wakecpu.h

   1 #ifndef __ASM_NUMAQ_WAKECPU_H
   2 #define __ASM_NUMAQ_WAKECPU_H
   3
   4 /* This file copes with machines that wakeup secondary CPUs by NMIs */
   5
   6 #define TRAMPOLINE_PHYS_LOW (0x8)
   7 #define TRAMPOLINE_PHYS_HIGH (0xa)
   8
   9 /* We don't do anything here because we use NMI's to boot instead */
  10 static inline void wait_for_init_deassert(atomic_t *deassert)
  11 {
  12 }
  13
  14 /*
  15  * Because we use NMIs rather than the INIT-STARTUP sequence to
  16  * bootstrap the CPUs, the APIC may be in a weird state. Kick it.
  17  */
  18 static inline void smp_callin_clear_local_apic(void)
  19 {
  20         clear_local_APIC();
  21 }
  22
  23 static inline void store_NMI_vector(unsigned short *high, unsigned short *low)
  24 {
  25         printk("Storing NMI vector\n");
  26         *high =
  27           *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_HIGH));
  28         *low =
  29           *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_LOW));
  30 }
  31
  32 static inline void restore_NMI_vector(unsigned short *high, unsigned short *low)
  33 {
  34         printk("Restoring NMI vector\n");
  35         *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_HIGH)) =
  36                                                                  *high;
  37         *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_LOW)) =
  38                                                                  *low;
  39 }
  40
  41 static inline void inquire_remote_apic(int apicid)
  42 {
  43 }
  44
  45 #endif /* __ASM_NUMAQ_WAKECPU_H */