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1da177e4 LT |
1 | /* |
2 | * include/asm-s390/sigp.h | |
3 | * | |
4 | * S390 version | |
5 | * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
6 | * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com), | |
7 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
8 | * Heiko Carstens (heiko.carstens@de.ibm.com) | |
9 | * | |
10 | * sigp.h by D.J. Barrow (c) IBM 1999 | |
11 | * contains routines / structures for signalling other S/390 processors in an | |
12 | * SMP configuration. | |
13 | */ | |
14 | ||
15 | #ifndef __SIGP__ | |
16 | #define __SIGP__ | |
17 | ||
18 | #include <asm/ptrace.h> | |
19 | #include <asm/atomic.h> | |
20 | ||
21 | /* get real cpu address from logical cpu number */ | |
22 | extern volatile int __cpu_logical_map[]; | |
23 | ||
24 | typedef enum | |
25 | { | |
26 | sigp_unassigned=0x0, | |
27 | sigp_sense, | |
28 | sigp_external_call, | |
29 | sigp_emergency_signal, | |
30 | sigp_start, | |
31 | sigp_stop, | |
32 | sigp_restart, | |
33 | sigp_unassigned1, | |
34 | sigp_unassigned2, | |
35 | sigp_stop_and_store_status, | |
36 | sigp_unassigned3, | |
37 | sigp_initial_cpu_reset, | |
38 | sigp_cpu_reset, | |
39 | sigp_set_prefix, | |
40 | sigp_store_status_at_address, | |
41 | sigp_store_extended_status_at_address | |
42 | } sigp_order_code; | |
43 | ||
44 | typedef __u32 sigp_status_word; | |
45 | ||
46 | typedef enum | |
47 | { | |
48 | sigp_order_code_accepted=0, | |
49 | sigp_status_stored, | |
50 | sigp_busy, | |
51 | sigp_not_operational | |
52 | } sigp_ccode; | |
53 | ||
54 | ||
55 | /* | |
56 | * Definitions for the external call | |
57 | */ | |
58 | ||
59 | /* 'Bit' signals, asynchronous */ | |
60 | typedef enum | |
61 | { | |
62 | ec_schedule=0, | |
63 | ec_call_function, | |
64 | ec_bit_last | |
65 | } ec_bit_sig; | |
66 | ||
67 | /* | |
68 | * Signal processor | |
69 | */ | |
4448aaf0 | 70 | static inline sigp_ccode |
1da177e4 LT |
71 | signal_processor(__u16 cpu_addr, sigp_order_code order_code) |
72 | { | |
73 | sigp_ccode ccode; | |
74 | ||
75 | __asm__ __volatile__( | |
76 | " sr 1,1\n" /* parameter=0 in gpr 1 */ | |
77 | " sigp 1,%1,0(%2)\n" | |
78 | " ipm %0\n" | |
79 | " srl %0,28\n" | |
80 | : "=d" (ccode) | |
81 | : "d" (__cpu_logical_map[cpu_addr]), "a" (order_code) | |
82 | : "cc" , "memory", "1" ); | |
83 | return ccode; | |
84 | } | |
85 | ||
86 | /* | |
87 | * Signal processor with parameter | |
88 | */ | |
4448aaf0 | 89 | static inline sigp_ccode |
1da177e4 LT |
90 | signal_processor_p(__u32 parameter, __u16 cpu_addr, |
91 | sigp_order_code order_code) | |
92 | { | |
93 | sigp_ccode ccode; | |
94 | ||
95 | __asm__ __volatile__( | |
96 | " lr 1,%1\n" /* parameter in gpr 1 */ | |
97 | " sigp 1,%2,0(%3)\n" | |
98 | " ipm %0\n" | |
99 | " srl %0,28\n" | |
100 | : "=d" (ccode) | |
101 | : "d" (parameter), "d" (__cpu_logical_map[cpu_addr]), | |
102 | "a" (order_code) | |
103 | : "cc" , "memory", "1" ); | |
104 | return ccode; | |
105 | } | |
106 | ||
107 | /* | |
108 | * Signal processor with parameter and return status | |
109 | */ | |
4448aaf0 | 110 | static inline sigp_ccode |
1da177e4 LT |
111 | signal_processor_ps(__u32 *statusptr, __u32 parameter, |
112 | __u16 cpu_addr, sigp_order_code order_code) | |
113 | { | |
114 | sigp_ccode ccode; | |
115 | ||
116 | __asm__ __volatile__( | |
117 | " sr 2,2\n" /* clear status */ | |
118 | " lr 3,%2\n" /* parameter in gpr 3 */ | |
119 | " sigp 2,%3,0(%4)\n" | |
120 | " st 2,%1\n" | |
121 | " ipm %0\n" | |
122 | " srl %0,28\n" | |
123 | : "=d" (ccode), "=m" (*statusptr) | |
124 | : "d" (parameter), "d" (__cpu_logical_map[cpu_addr]), | |
125 | "a" (order_code) | |
126 | : "cc" , "memory", "2" , "3" | |
127 | ); | |
128 | return ccode; | |
129 | } | |
130 | ||
131 | #endif /* __SIGP__ */ |