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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASM_MACH_WAKECPU_H
2#define __ASM_MACH_WAKECPU_H
3
4/* This file copes with machines that wakeup secondary CPUs by NMIs */
5
6#define WAKE_SECONDARY_VIA_NMI
7
8#define TRAMPOLINE_LOW phys_to_virt(0x8)
9#define TRAMPOLINE_HIGH phys_to_virt(0xa)
10
11#define boot_cpu_apicid boot_cpu_logical_apicid
12
13/* We don't do anything here because we use NMI's to boot instead */
14static inline void wait_for_init_deassert(atomic_t *deassert)
15{
16}
17
18/*
19 * Because we use NMIs rather than the INIT-STARTUP sequence to
20 * bootstrap the CPUs, the APIC may be in a weird state. Kick it.
21 */
22static inline void smp_callin_clear_local_apic(void)
23{
24 clear_local_APIC();
25}
26
27static inline void store_NMI_vector(unsigned short *high, unsigned short *low)
28{
29 printk("Storing NMI vector\n");
30 *high = *((volatile unsigned short *) TRAMPOLINE_HIGH);
31 *low = *((volatile unsigned short *) TRAMPOLINE_LOW);
32}
33
34static inline void restore_NMI_vector(unsigned short *high, unsigned short *low)
35{
36 printk("Restoring NMI vector\n");
37 *((volatile unsigned short *) TRAMPOLINE_HIGH) = *high;
38 *((volatile unsigned short *) TRAMPOLINE_LOW) = *low;
39}
40
41#define inquire_remote_apic(apicid) {}
42
43#endif /* __ASM_MACH_WAKECPU_H */