Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / arch / x86 / include / asm / 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 *)phys_to_virt(apic->trampoline_phys_high)) =
17                                                                  start_eip >> 4;
18         pr_debug("2.\n");
19         *((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_low)) =
20                                                          start_eip & 0xf;
21         pr_debug("3.\n");
22 }
23
24 static inline void smpboot_restore_warm_reset_vector(void)
25 {
26         /*
27          * Install writable page 0 entry to set BIOS data area.
28          */
29         local_flush_tlb();
30
31         /*
32          * Paranoid:  Set warm reset code and vector here back
33          * to default values.
34          */
35         CMOS_WRITE(0, 0xf);
36
37         *((volatile long *)phys_to_virt(apic->trampoline_phys_low)) = 0;
38 }
39
40 static inline void __init smpboot_setup_io_apic(void)
41 {
42 #ifdef CONFIG_X86_IO_APIC
43         /*
44          * Here we can be sure that there is an IO-APIC in the system. Let's
45          * go and set it up:
46          */
47         if (!skip_ioapic_setup && nr_ioapics)
48                 setup_IO_APIC();
49         else {
50                 nr_ioapics = 0;
51         }
52 #endif
53 }
54
55 static inline void smpboot_clear_io_apic(void)
56 {
57 #ifdef CONFIG_X86_IO_APIC
58         nr_ioapics = 0;
59 #endif
60 }