projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | { | |
| 94c12cc7 | 73 | register unsigned long reg1 asm ("1") = 0; |
| 1da177e4 LT |
74 | sigp_ccode ccode; |
| 75 | ||
| 94c12cc7 MS |
76 | asm volatile( |
| 77 | " sigp %1,%2,0(%3)\n" | |
| 78 | " ipm %0\n" | |
| 79 | " srl %0,28\n" | |
| 80 | : "=d" (ccode) | |
| 81 | : "d" (reg1), "d" (__cpu_logical_map[cpu_addr]), | |
| 82 | "a" (order_code) : "cc" , "memory"); | |
| 1da177e4 LT |
83 | return ccode; |
| 84 | } | |
| 85 | ||
| 86 | /* | |
| 87 | * Signal processor with parameter | |
| 88 | */ | |
| 4448aaf0 | 89 | static inline sigp_ccode |
| 94c12cc7 | 90 | signal_processor_p(__u32 parameter, __u16 cpu_addr, sigp_order_code order_code) |
| 1da177e4 | 91 | { |
| 94c12cc7 | 92 | register unsigned int reg1 asm ("1") = parameter; |
| 1da177e4 | 93 | sigp_ccode ccode; |
| 94c12cc7 MS |
94 | |
| 95 | asm volatile( | |
| 96 | " sigp %1,%2,0(%3)\n" | |
| 97 | " ipm %0\n" | |
| 98 | " srl %0,28\n" | |
| 1da177e4 | 99 | : "=d" (ccode) |
| 94c12cc7 MS |
100 | : "d" (reg1), "d" (__cpu_logical_map[cpu_addr]), |
| 101 | "a" (order_code) : "cc" , "memory"); | |
| 1da177e4 LT |
102 | return ccode; |
| 103 | } | |
| 104 | ||
| 105 | /* | |
| 106 | * Signal processor with parameter and return status | |
| 107 | */ | |
| 4448aaf0 | 108 | static inline sigp_ccode |
| 94c12cc7 MS |
109 | signal_processor_ps(__u32 *statusptr, __u32 parameter, __u16 cpu_addr, |
| 110 | sigp_order_code order_code) | |
| 1da177e4 | 111 | { |
| 94c12cc7 | 112 | register unsigned int reg1 asm ("1") = parameter; |
| 1da177e4 | 113 | sigp_ccode ccode; |
| 94c12cc7 MS |
114 | |
| 115 | asm volatile( | |
| 116 | " sigp %1,%2,0(%3)\n" | |
| 117 | " ipm %0\n" | |
| 118 | " srl %0,28\n" | |
| 119 | : "=d" (ccode), "+d" (reg1) | |
| 120 | : "d" (__cpu_logical_map[cpu_addr]), "a" (order_code) | |
| 121 | : "cc" , "memory"); | |
| 122 | *statusptr = reg1; | |
| 123 | return ccode; | |
| 1da177e4 LT |
124 | } |
| 125 | ||
| 126 | #endif /* __SIGP__ */ |