include/asm-x86/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_clear_io_apic_irqs(void)
   5 {
   6         io_apic_irqs = 0;
   7 }
   8
   9 static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
  10 {
  11         CMOS_WRITE(0xa, 0xf);
  12         local_flush_tlb();
  13         Dprintk("1.\n");
  14         *((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4;
  15         Dprintk("2.\n");
  16         *((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
  17         Dprintk("3.\n");
  18 }
  19
  20 static inline void smpboot_restore_warm_reset_vector(void)
  21 {
  22         /*
  23          * Install writable page 0 entry to set BIOS data area.
  24          */
  25         local_flush_tlb();
  26
  27         /*
  28          * Paranoid:  Set warm reset code and vector here back
  29          * to default values.
  30          */
  31         CMOS_WRITE(0, 0xf);
  32
  33         *((volatile long *) phys_to_virt(0x467)) = 0;
  34 }
  35
  36 static inline void __init smpboot_setup_io_apic(void)
  37 {
  38         /*
  39          * Here we can be sure that there is an IO-APIC in the system. Let's
  40          * go and set it up:
  41          */
  42         if (!skip_ioapic_setup && nr_ioapics)
  43                 setup_IO_APIC();
  44         else
  45                 nr_ioapics = 0;
  46 }
  47
  48 static inline void smpboot_clear_io_apic(void)
  49 {
  50         nr_ioapics = 0;
  51 }