sigp.h
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- /*
- * include/asm-s390/sigp.h
- *
- * S390 version
- * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
- * Martin Schwidefsky (schwidefsky@de.ibm.com)
- *
- * sigp.h by D.J. Barrow (c) IBM 1999
- * contains routines / structures for signalling other S/390 processors in an
- * SMP configuration.
- */
- #ifndef __SIGP__
- #define __SIGP__
- #include <asm/ptrace.h>
- #include <asm/atomic.h>
- /* get real cpu address from logical cpu number */
- extern volatile int __cpu_logical_map[];
- typedef enum
- {
- sigp_unassigned=0x0,
- sigp_sense,
- sigp_external_call,
- sigp_emergency_signal,
- sigp_start,
- sigp_stop,
- sigp_restart,
- sigp_unassigned1,
- sigp_unassigned2,
- sigp_stop_and_store_status,
- sigp_unassigned3,
- sigp_initial_cpu_reset,
- sigp_cpu_reset,
- sigp_set_prefix,
- sigp_store_status_at_address,
- sigp_store_extended_status_at_address
- } sigp_order_code;
- typedef __u32 sigp_status_word;
- typedef enum
- {
- sigp_order_code_accepted=0,
- sigp_status_stored,
- sigp_busy,
- sigp_not_operational
- } sigp_ccode;
- /*
- * Definitions for the external call
- */
- /* 'Bit' signals, asynchronous */
- typedef enum
- {
- ec_schedule=0,
- ec_call_function,
- ec_bit_last
- } ec_bit_sig;
- /*
- * Signal processor
- */
- extern __inline__ sigp_ccode
- signal_processor(__u16 cpu_addr, sigp_order_code order_code)
- {
- sigp_ccode ccode;
- __asm__ __volatile__(
- " sgr 1,1n" /* parameter=0 in gpr 1 */
- " sigp 1,%1,0(%2)n"
- " ipm %0n"
- " srl %0,28"
- : "=d" (ccode)
- : "d" (__cpu_logical_map[cpu_addr]), "a" (order_code)
- : "cc" , "memory", "1" );
- return ccode;
- }
- /*
- * Signal processor with parameter
- */
- extern __inline__ sigp_ccode
- signal_processor_p(__u64 parameter,__u16 cpu_addr,sigp_order_code order_code)
- {
- sigp_ccode ccode;
-
- __asm__ __volatile__(
- " lgr 1,%1n" /* parameter in gpr 1 */
- " sigp 1,%2,0(%3)n"
- " ipm %0n"
- " srl %0,28n"
- : "=d" (ccode)
- : "d" (parameter), "d" (__cpu_logical_map[cpu_addr]),
- "a" (order_code)
- : "cc" , "memory", "1" );
- return ccode;
- }
- /*
- * Signal processor with parameter and return status
- */
- extern __inline__ sigp_ccode
- signal_processor_ps(__u32 *statusptr, __u64 parameter,
- __u16 cpu_addr, sigp_order_code order_code)
- {
- sigp_ccode ccode;
-
- __asm__ __volatile__(
- " sgr 2,2n" /* clear status so it doesn't contain rubbish if not saved. */
- " lgr 3,%2n" /* parameter in gpr 3 */
- " sigp 2,%3,0(%4)n"
- " stg 2,%1n"
- " ipm %0n"
- " srl %0,28n"
- : "=d" (ccode), "=m" (*statusptr)
- : "d" (parameter), "d" (__cpu_logical_map[cpu_addr]),
- "a" (order_code)
- : "cc" , "memory", "2" , "3"
- );
- return ccode;
- }
- #endif /* __SIGP__ */