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
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
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