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44 lines
1.2 KiB
44 lines
1.2 KiB
20 years ago
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#ifndef __ASM_MACH_WAKECPU_H
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#define __ASM_MACH_WAKECPU_H
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/* This file copes with machines that wakeup secondary CPUs by NMIs */
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#define WAKE_SECONDARY_VIA_NMI
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#define TRAMPOLINE_LOW phys_to_virt(0x8)
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#define TRAMPOLINE_HIGH phys_to_virt(0xa)
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#define boot_cpu_apicid boot_cpu_logical_apicid
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/* We don't do anything here because we use NMI's to boot instead */
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static inline void wait_for_init_deassert(atomic_t *deassert)
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{
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}
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/*
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* Because we use NMIs rather than the INIT-STARTUP sequence to
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* bootstrap the CPUs, the APIC may be in a weird state. Kick it.
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*/
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static inline void smp_callin_clear_local_apic(void)
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{
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clear_local_APIC();
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}
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static inline void store_NMI_vector(unsigned short *high, unsigned short *low)
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{
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printk("Storing NMI vector\n");
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*high = *((volatile unsigned short *) TRAMPOLINE_HIGH);
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*low = *((volatile unsigned short *) TRAMPOLINE_LOW);
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}
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static inline void restore_NMI_vector(unsigned short *high, unsigned short *low)
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{
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printk("Restoring NMI vector\n");
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*((volatile unsigned short *) TRAMPOLINE_HIGH) = *high;
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*((volatile unsigned short *) TRAMPOLINE_LOW) = *low;
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}
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#define inquire_remote_apic(apicid) {}
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#endif /* __ASM_MACH_WAKECPU_H */
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