File: /usr/src/linux/include/asm-alpha/smp.h

1     #ifndef __ASM_SMP_H
2     #define __ASM_SMP_H
3     
4     #include <linux/config.h>
5     #include <asm/pal.h>
6     
7     /* HACK: Cabrio WHAMI return value is bogus if more than 8 bits used.. :-( */
8     
9     static __inline__ unsigned char
10     __hard_smp_processor_id(void)
11     {
12     	register unsigned char __r0 __asm__("$0");
13     	__asm__ __volatile__(
14     		"call_pal %1 #whami"
15     		: "=r"(__r0)
16     		:"i" (PAL_whami)
17     		: "$1", "$22", "$23", "$24", "$25");
18     	return __r0;
19     }
20     
21     #ifdef CONFIG_SMP
22     
23     #include <linux/threads.h>
24     #include <asm/irq.h>
25     
26     struct cpuinfo_alpha {
27     	unsigned long loops_per_jiffy;
28     	unsigned long last_asn;
29     	int need_new_asn;
30     	int asn_lock;
31     	unsigned long *pgd_cache;
32     	unsigned long *pmd_cache;
33     	unsigned long *pte_cache;
34     	unsigned long pgtable_cache_sz;
35     	unsigned long ipi_count;
36     	unsigned long irq_attempt[NR_IRQS];
37     	unsigned long prof_multiplier;
38     	unsigned long prof_counter;
39     	unsigned char mcheck_expected;
40     	unsigned char mcheck_taken;
41     	unsigned char mcheck_extra;
42     } __attribute__((aligned(64)));
43     
44     extern struct cpuinfo_alpha cpu_data[NR_CPUS];
45     
46     #define PROC_CHANGE_PENALTY     20
47     
48     /* Map from cpu id to sequential logical cpu number.  This will only
49        not be idempotent when cpus failed to come on-line.  */
50     extern int __cpu_number_map[NR_CPUS];
51     #define cpu_number_map(cpu)  __cpu_number_map[cpu]
52     
53     /* The reverse map from sequential logical cpu number to cpu id.  */
54     extern int __cpu_logical_map[NR_CPUS];
55     #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
56     
57     #define hard_smp_processor_id()	__hard_smp_processor_id()
58     #define smp_processor_id()	(current->processor)
59     
60     extern unsigned long cpu_present_mask;
61     #define cpu_online_map cpu_present_mask
62     
63     extern int smp_call_function_on_cpu(void (*func) (void *info), void *info,int retry, int wait, unsigned long cpu);
64     
65     #else /* CONFIG_SMP */
66     
67     #define smp_call_function_on_cpu(func,info,retry,wait,cpu)    ({ 0; })
68     
69     #endif /* CONFIG_SMP */
70     
71     #define NO_PROC_ID	(-1)
72     
73     #endif
74