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 NUMAQ_TRAMPOLINE_PHYS_LOW (0x8)
   7 #define NUMAQ_TRAMPOLINE_PHYS_HIGH (0xa)
   8
   9 /*
  10  * Because we use NMIs rather than the INIT-STARTUP sequence to
  11  * bootstrap the CPUs, the APIC may be in a weird state. Kick it:
  12  */
  13 static inline void numaq_smp_callin_clear_local_apic(void)
  14 {
  15         clear_local_APIC();
  16 }
  17
  18 static inline void
  19 numaq_store_NMI_vector(unsigned short *high, unsigned short *low)
  20 {
  21         printk("Storing NMI vector\n");
  22         *high =
  23           *((volatile unsigned short *)phys_to_virt(NUMAQ_TRAMPOLINE_PHYS_HIGH));
  24         *low =
  25           *((volatile unsigned short *)phys_to_virt(NUMAQ_TRAMPOLINE_PHYS_LOW));
  26 }
  27
  28 static inline void
  29 numaq_restore_NMI_vector(unsigned short *high, unsigned short *low)
  30 {
  31         printk("Restoring NMI vector\n");
  32         *((volatile unsigned short *)phys_to_virt(NUMAQ_TRAMPOLINE_PHYS_HIGH)) =
  33                                                                  *high;
  34         *((volatile unsigned short *)phys_to_virt(NUMAQ_TRAMPOLINE_PHYS_LOW)) =
  35                                                                  *low;
  36 }
  37
  38 static inline void inquire_remote_apic(int apicid)
  39 {
  40 }
  41
  42 #endif /* __ASM_NUMAQ_WAKECPU_H */