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Diffstat (limited to 'include/asm-s390x/sigp.h')
| -rw-r--r-- | include/asm-s390x/sigp.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/include/asm-s390x/sigp.h b/include/asm-s390x/sigp.h new file mode 100644 index 000000000..6835d5df7 --- /dev/null +++ b/include/asm-s390x/sigp.h @@ -0,0 +1,159 @@ +/* + * 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/misc390.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_restart, + ec_halt, + ec_power_off, + ec_bit_last +} ec_bit_sig; + +/* Signals which come with a parameter area */ +typedef enum +{ + ec_callback_sync, + ec_callback_async +} ec_cmd_sig; + +/* state information for signals */ +typedef enum +{ + ec_pending, + ec_executing, + ec_done +} ec_state; + +/* header for the queuing of callbacks */ +typedef struct ec_ext_call +{ + ec_cmd_sig cmd; + atomic_t status; + struct ec_ext_call *next; + void (*func)(void *info); + void *info; +} ec_ext_call; + +/* + * Signal processor + */ +extern __inline__ sigp_ccode +signal_processor(__u16 cpu_addr, sigp_order_code order_code) +{ + sigp_ccode ccode; + + __asm__ __volatile__( + " sgr 1,1\n" /* parameter=0 in gpr 1 */ + " sigp 1,%1,0(%2)\n" + " ipm %0\n" + " 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,%1\n" /* parameter in gpr 1 */ + " sigp 1,%2,0(%3)\n" + " ipm %0\n" + " srl %0,28\n" + : "=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 2,2\n" /* clear status so it doesn't contain rubbish if not saved. */ + " lgr 3,%2\n" /* parameter in gpr 3 */ + " sigp 2,%3,0(%4)\n" + " stg 2,%1\n" + " ipm %0\n" + " srl %0,28\n" + : "=d" (ccode), "=m" (*statusptr) + : "d" (parameter), "d" (__cpu_logical_map[cpu_addr]), + "a" (order_code) + : "cc" , "memory", "2" , "3" + ); + return ccode; +} + +#endif __SIGP__ + + |