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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
22extern volatile int __cpu_logical_map[];
23
24typedef 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
44typedef __u32 sigp_status_word;
45
46typedef 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 */
60typedef enum
61{
62 ec_schedule=0,
63 ec_call_function,
64 ec_bit_last
65} ec_bit_sig;
66
67/*
68 * Signal processor
69 */
70extern __inline__ sigp_ccode
71signal_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 */
89extern __inline__ sigp_ccode
90signal_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 */
110extern __inline__ sigp_ccode
111signal_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__ */