tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __ASM_SMP_H
2#define __ASM_SMP_H
3
4#include <linux/config.h>
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
12static __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
28struct 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
41extern struct cpuinfo_alpha cpu_data[NR_CPUS];
42
43#define PROC_CHANGE_PENALTY 20
44
45#define hard_smp_processor_id() __hard_smp_processor_id()
46#define raw_smp_processor_id() (current_thread_info()->cpu)
47
48extern cpumask_t cpu_present_mask;
49extern cpumask_t cpu_online_map;
50extern int smp_num_cpus;
51#define cpu_possible_map cpu_present_mask
52
53int smp_call_function_on_cpu(void (*func) (void *info), void *info,int retry, int wait, cpumask_t cpu);
54
55#else /* CONFIG_SMP */
56
57#define smp_call_function_on_cpu(func,info,retry,wait,cpu) ({ 0; })
58
59#endif /* CONFIG_SMP */
60
61#define NO_PROC_ID (-1)
62
63#endif