x86: use get_bios_ebda in mpparse_64.c
[linux-2.6] / 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 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 }