1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SMP_H
3 #define __ASM_SMP_H
4 
5 #include <linux/threads.h>
6 #include <linux/cpumask.h>
7 #include <linux/bitops.h>
8 #include <asm/pal.h>
9 
10 /* HACK: Cabrio WHAMI return value is bogus if more than 8 bits used.. :-( */
11 
12 static __inline__ unsigned char
__hard_smp_processor_id(void)13 __hard_smp_processor_id(void)
14 {
15 	register unsigned char __r0 __asm__("$0");
16 	__asm__ __volatile__(
17 		"call_pal %1 #whami"
18 		: "=r"(__r0)
19 		:"i" (PAL_whami)
20 		: "$1", "$22", "$23", "$24", "$25");
21 	return __r0;
22 }
23 
24 #ifdef CONFIG_SMP
25 
26 #include <asm/irq.h>
27 
28 struct cpuinfo_alpha {
29 	unsigned long loops_per_jiffy;
30 	unsigned long last_asn;
31 	int need_new_asn;
32 	int asn_lock;
33 	unsigned long ipi_count;
34 	unsigned long prof_multiplier;
35 	unsigned long prof_counter;
36 	unsigned char mcheck_expected;
37 	unsigned char mcheck_taken;
38 	unsigned char mcheck_extra;
39 } __attribute__((aligned(64)));
40 
41 extern struct cpuinfo_alpha cpu_data[NR_CPUS];
42 
43 #define hard_smp_processor_id()	__hard_smp_processor_id()
44 #define raw_smp_processor_id()	(current_thread_info()->cpu)
45 
46 extern int smp_num_cpus;
47 
48 extern void arch_send_call_function_single_ipi(int cpu);
49 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
50 
51 #else /* CONFIG_SMP */
52 
53 #define hard_smp_processor_id()		0
54 #define smp_call_function_on_cpu(func,info,wait,cpu)    ({ 0; })
55 
56 #endif /* CONFIG_SMP */
57 
58 #define NO_PROC_ID	(-1)
59 
60 #endif
61