arch/x86/include/mach-xen/asm/mach_traps.h

   1 /*
   2  *  include/asm-xen/asm-i386/mach-xen/mach_traps.h
   3  *
   4  *  Machine specific NMI handling for Xen
   5  */
   6 #ifndef _MACH_TRAPS_H
   7 #define _MACH_TRAPS_H
   8
   9 #include <linux/bitops.h>
  10 #include <xen/interface/nmi.h>
  11
  12 #define NMI_REASON_SERR         0x80
  13 #define NMI_REASON_IOCHK        0x40
  14 #define NMI_REASON_MASK         (NMI_REASON_SERR | NMI_REASON_IOCHK)
  15
  16 static inline void clear_serr_error(unsigned char reason) {}
  17 static inline void clear_io_check_error(unsigned char reason) {}
  18
  19 static inline unsigned char xen_get_nmi_reason(void)
  20 {
  21         shared_info_t *s = HYPERVISOR_shared_info;
  22         unsigned char reason = 0;
  23
  24         /* construct a value which looks like it came from
  25          * port 0x61.
  26          */
  27         if (test_bit(_XEN_NMIREASON_io_error, &s->arch.nmi_reason))
  28                 reason |= NMI_REASON_IOCHK;
  29         if (test_bit(_XEN_NMIREASON_parity_error, &s->arch.nmi_reason))
  30                 reason |= NMI_REASON_SERR;
  31
  32         return reason;
  33 }
  34
  35 static inline void reassert_nmi(void) {}
  36
  37 #endif /* !_MACH_TRAPS_H */