diff options
Diffstat (limited to 'arch/x86/include/asm/numaq/wakecpu.h')
| -rw-r--r-- | arch/x86/include/asm/numaq/wakecpu.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/x86/include/asm/numaq/wakecpu.h b/arch/x86/include/asm/numaq/wakecpu.h new file mode 100644 index 000000000000..6f499df8eddb --- /dev/null +++ b/arch/x86/include/asm/numaq/wakecpu.h @@ -0,0 +1,45 @@ +#ifndef __ASM_NUMAQ_WAKECPU_H +#define __ASM_NUMAQ_WAKECPU_H + +/* This file copes with machines that wakeup secondary CPUs by NMIs */ + +#define TRAMPOLINE_PHYS_LOW (0x8) +#define TRAMPOLINE_PHYS_HIGH (0xa) + +/* We don't do anything here because we use NMI's to boot instead */ +static inline void wait_for_init_deassert(atomic_t *deassert) +{ +} + +/* + * Because we use NMIs rather than the INIT-STARTUP sequence to + * bootstrap the CPUs, the APIC may be in a weird state. Kick it. + */ +static inline void smp_callin_clear_local_apic(void) +{ + clear_local_APIC(); +} + +static inline void store_NMI_vector(unsigned short *high, unsigned short *low) +{ + printk("Storing NMI vector\n"); + *high = + *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_HIGH)); + *low = + *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_LOW)); +} + +static inline void restore_NMI_vector(unsigned short *high, unsigned short *low) +{ + printk("Restoring NMI vector\n"); + *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_HIGH)) = + *high; + *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_LOW)) = + *low; +} + +static inline void inquire_remote_apic(int apicid) +{ +} + +#endif /* __ASM_NUMAQ_WAKECPU_H */ |