blob: 7f45f6311059f5d8e3675dbf6d0e759407ad72fb [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
2 * which needs to alter them. */
3
4static inline void smpboot_clear_io_apic_irqs(void)
5{
6 io_apic_irqs = 0;
7}
8
9static 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
20static 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
36static 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}