110a2de891239407ff048772b920fa531119a7eb
[linux-2.6.git] / include / asm-sparc64 / smp.h
1 /* smp.h: Sparc64 specific SMP stuff.
2  *
3  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
4  */
5
6 #ifndef _SPARC64_SMP_H
7 #define _SPARC64_SMP_H
8
9 #include <linux/config.h>
10 #include <linux/threads.h>
11 #include <asm/asi.h>
12 #include <asm/starfire.h>
13 #include <asm/spitfire.h>
14
15 #ifndef __ASSEMBLY__
16
17 #include <linux/cpumask.h>
18 #include <linux/cache.h>
19
20 #endif /* !(__ASSEMBLY__) */
21
22 #ifdef CONFIG_SMP
23
24 #ifndef __ASSEMBLY__
25
26 /*
27  *      Private routines/data
28  */
29  
30 #include <asm/bitops.h>
31 #include <asm/atomic.h>
32
33 extern cpumask_t phys_cpu_present_map;
34 #define cpu_possible_map phys_cpu_present_map
35
36 /*
37  *      General functions that each host system must provide.
38  */
39
40 static __inline__ int hard_smp_processor_id(void)
41 {
42         if (tlb_type == cheetah || tlb_type == cheetah_plus) {
43                 unsigned long cfg, ver;
44                 __asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
45                 if ((ver >> 32) == 0x003e0016) {
46                         __asm__ __volatile__("ldxa [%%g0] %1, %0"
47                                              : "=r" (cfg)
48                                              : "i" (ASI_JBUS_CONFIG));
49                         return ((cfg >> 17) & 0x1f);
50                 } else {
51                         __asm__ __volatile__("ldxa [%%g0] %1, %0"
52                                              : "=r" (cfg)
53                                              : "i" (ASI_SAFARI_CONFIG));
54                         return ((cfg >> 17) & 0x3ff);
55                 }
56         } else if (this_is_starfire != 0) {
57                 return starfire_hard_smp_processor_id();
58         } else {
59                 unsigned long upaconfig;
60                 __asm__ __volatile__("ldxa      [%%g0] %1, %0"
61                                      : "=r" (upaconfig)
62                                      : "i" (ASI_UPA_CONFIG));
63                 return ((upaconfig >> 17) & 0x1f);
64         }
65 }
66
67 #define raw_smp_processor_id() (current_thread_info()->cpu)
68
69 #endif /* !(__ASSEMBLY__) */
70
71 #endif /* !(CONFIG_SMP) */
72
73 #define NO_PROC_ID              0xFF
74
75 #endif /* !(_SPARC64_SMP_H) */