arch/x86/include/asm/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 #ifdef CONFIG_X86_IO_APIC
   7         io_apic_irqs = 0;
   8 #endif
   9 }
  10
  11 static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
  12 {
  13         CMOS_WRITE(0xa, 0xf);
  14         local_flush_tlb();
  15         pr_debug("1.\n");
  16         *((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4;
  17         pr_debug("2.\n");
  18         *((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
  19         pr_debug("3.\n");
  20 }
  21
  22 static inline void smpboot_restore_warm_reset_vector(void)
  23 {
  24         /*
  25          * Install writable page 0 entry to set BIOS data area.
  26          */
  27         local_flush_tlb();
  28
  29         /*
  30          * Paranoid:  Set warm reset code and vector here back
  31          * to default values.
  32          */
  33         CMOS_WRITE(0, 0xf);
  34
  35         *((volatile long *) phys_to_virt(0x467)) = 0;
  36 }
  37
  38 static inline void __init smpboot_setup_io_apic(void)
  39 {
  40 #ifdef CONFIG_X86_IO_APIC
  41         /*
  42          * Here we can be sure that there is an IO-APIC in the system. Let's
  43          * go and set it up:
  44          */
  45         if (!skip_ioapic_setup && nr_ioapics)
  46                 setup_IO_APIC();
  47         else {
  48                 nr_ioapics = 0;
  49                 localise_nmi_watchdog();
  50         }
  51 #endif
  52 }
  53
  54 static inline void smpboot_clear_io_apic(void)
  55 {
  56 #ifdef CONFIG_X86_IO_APIC
  57         nr_ioapics = 0;
  58 #endif
  59 }