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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/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__
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