include/asm-xen/asm-i386/mach-xen/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_clear_io_apic_irqs(void)
   5 {
   6 #if 1
   7         printk("smpboot_clear_io_apic_irqs\n");
   8 #else
   9         io_apic_irqs = 0;
  10 #endif
  11 }
  12
  13 static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
  14 {
  15 #if 1
  16         printk("smpboot_setup_warm_reset_vector\n");
  17 #else
  18         CMOS_WRITE(0xa, 0xf);
  19         local_flush_tlb();
  20         Dprintk("1.\n");
  21         *((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4;
  22         Dprintk("2.\n");
  23         *((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
  24         Dprintk("3.\n");
  25 #endif
  26 }
  27
  28 static inline void smpboot_restore_warm_reset_vector(void)
  29 {
  30         /*
  31          * Install writable page 0 entry to set BIOS data area.
  32          */
  33         local_flush_tlb();
  34
  35         /*
  36          * Paranoid:  Set warm reset code and vector here back
  37          * to default values.
  38          */
  39         CMOS_WRITE(0, 0xf);
  40
  41         *((volatile long *) phys_to_virt(0x467)) = 0;
  42 }
  43
  44 static inline void smpboot_setup_io_apic(void)
  45 {
  46 #if 1
  47         printk("smpboot_setup_io_apic\n");
  48 #else
  49         /*
  50          * Here we can be sure that there is an IO-APIC in the system. Let's
  51          * go and set it up:
  52          */
  53         if (!skip_ioapic_setup && nr_ioapics)
  54                 setup_IO_APIC();
  55 #endif
  56 }
  57
  58
  59 #define smp_found_config        (HYPERVISOR_shared_info->n_vcpu > 1)