Release 4.14 arch/alpha/include/asm/smp.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SMP_H

#define __ASM_SMP_H

#include <linux/threads.h>
#include <linux/cpumask.h>
#include <linux/bitops.h>
#include <asm/pal.h>

/* HACK: Cabrio WHAMI return value is bogus if more than 8 bits used.. :-( */


static __inline__ unsigned char

__hard_smp_processor_id(void)
{
	register unsigned char __r0 __asm__("$0");
	__asm__ __volatile__(
                "call_pal %1 #whami"
                : "=r"(__r0)
                :"i" (PAL_whami)
                : "$1", "$22", "$23", "$24", "$25");
	return __r0;
}

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#ifdef CONFIG_SMP

#include <asm/irq.h>


struct cpuinfo_alpha {
	
unsigned long loops_per_jiffy;
	
unsigned long last_asn;
	
int need_new_asn;
	
int asn_lock;
	
unsigned long ipi_count;
	
unsigned long prof_multiplier;
	
unsigned long prof_counter;
	
unsigned char mcheck_expected;
	
unsigned char mcheck_taken;
	
unsigned char mcheck_extra;
} __attribute__((aligned(64)));

extern struct cpuinfo_alpha cpu_data[NR_CPUS];


#define hard_smp_processor_id()	__hard_smp_processor_id()

#define raw_smp_processor_id()	(current_thread_info()->cpu)

extern int smp_num_cpus;

extern void arch_send_call_function_single_ipi(int cpu);
extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);

#else /* CONFIG_SMP */


#define hard_smp_processor_id()		0

#define smp_call_function_on_cpu(func,info,wait,cpu)    ({ 0; })

#endif /* CONFIG_SMP */


#define NO_PROC_ID	(-1)

#endif
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Linus Torvalds (pre-git)
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Linus Torvalds
22
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2
8.00%
Jens Axboe
8
4.60%
1
4.00%
Ivan Kokshaysky
6
3.45%
2
8.00%
Fernando Luis Vázquez Cao
5
2.87%
1
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Rusty Russell
5
2.87%
1
4.00%
Richard Henderson
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1
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Andrew Morton
3
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Greg Kroah-Hartman
1
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Ingo Molnar
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25
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Directory: arch/alpha/include/asm

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