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/*
 *	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
 *	  All Rights Reserved
 */

/*
 * Copyright (c) 1992, 2020, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef _SYS_PROCESSOR_H
#define	_SYS_PROCESSOR_H

#include <sys/types.h>
#include <sys/procset.h>

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * Definitions for p_online, processor_info & lgrp system calls.
 */

/*
 * Type for an lgrpid
 */
typedef uint16_t lgrpid_t;

/*
 * Type for processor name (CPU number).
 */
typedef	int	processorid_t;
typedef int	chipid_t;

/*
 * Flags and return values for p_online(2), and pi_state for processor_info(2).
 * These flags are *not* for in-kernel examination of CPU states.
 * See <sys/cpuvar.h> for appropriate informational functions.
 */
#define	P_OFFLINE	0x0001	/* processor is offline, as quiet as possible */
#define	P_ONLINE	0x0002	/* processor is online */
#define	P_STATUS	0x0003	/* value passed to p_online to request status */
#define	P_FAULTED	0x0004	/* processor is offline, in faulted state */
#define	P_POWEROFF	0x0005	/* processor is powered off */
#define	P_NOINTR	0x0006	/* processor is online, but no I/O interrupts */
#define	P_SPARE		0x0007	/* processor is offline, can be reactivated */
#define	P_POWERIDLE	0x0008	/* processor is offline, for power capping */
#define	P_BAD		P_FAULTED	/* unused but defined by USL */
#define	P_FORCED 	0x10000000	/* force processor offline */

/*
 * String names for processor states defined above.
 */
#define	PS_OFFLINE	"off-line"
#define	PS_ONLINE	"on-line"
#define	PS_FAULTED	"faulted"
#define	PS_POWEROFF	"powered-off"
#define	PS_NOINTR	"no-intr"
#define	PS_SPARE	"spare"
#define	PS_POWERIDLE	"power-idle"

/*
 * Structure filled in by processor_info(2). This structure
 * SHOULD NOT BE MODIFIED. Changes to the structure would
 * negate ABI compatibility.
 *
 * The string fields are guaranteed to contain a NULL.
 *
 * The pi_fputypes field contains a (possibly empty) comma-separated
 * list of floating point identifier strings.
 */
#define	PI_TYPELEN	16	/* max size of CPU type string */
#define	PI_FPUTYPE	32	/* max size of FPU types string */

typedef struct {
	int	pi_state;  			/* processor state, see above */
	char	pi_processor_type[PI_TYPELEN];	/* ASCII CPU type */
	char	pi_fputypes[PI_FPUTYPE];	/* ASCII FPU types */
	int	pi_clock;			/* CPU clock freq in MHz */
} processor_info_t;

/*
 * Binding values for processor_bind(2)
 */
#define	PBIND_NONE		(-1)	/* LWP/thread is not bound */
#define	PBIND_QUERY		(-2)	/* don't set, just return the binding */

/*
 * processor_sys() system call subcodes
 */
#define	PROCESSOR_SYS_AFF		(0)
#define	PROCESSOR_SYS_INFO		(1)
#define	PROCESSOR_SYS_LIST		(2)
#define	PROCESSOR_SYS_GROUP_LIST		(3)
#define	PROCESSOR_SYS_GROUP_PROCESSOR_LIST	(4)
#define	PROCESSOR_SYS_GET_CORE_CHIP_PSET	(5)

/*
 * processor_affinity(2) id types and flags. Note that there's a 1:1 mapping
 * between TS_BND_{WEAK,STRONG,INH_EXEC,INH_FORK,INH_THR) and the corresponding
 * flags below. This is because t_schedflag is already used for other related
 * binding flags.
 */
typedef enum {
	PA_QUERY	= 0x000001,	/* get flags and affinities */
	PA_CLEAR	= 0x000002,	/* clear affinity */
	PA_TYPE_CPU	= 0x000080,	/* bind to CPU(s) (default) */
	PA_TYPE_PG	= 0x000100,	/* bind to PG(s) */
	PA_TYPE_LGRP	= 0x000200,	/* bind to LGRP(s) */
	PA_NEGATIVE	= 0x000400,	/* avoid running */
	PA_TYPE_CORE	= 0x001000,	/* bind to core(s) */
	PA_AFF_WEAK	= 0x020000,	/* prefer to run */
	PA_AFF_STRONG	= 0x040000,	/* only run on */
	PA_NO_INH_EXEC	= 0x080000,	/* across exec(2) */
	PA_NO_INH_1EXEC = 0x100000,	/* private flag, used by pbind(8) */
	PA_NO_INH_FORK	= 0x200000,	/* across fork(2) */
	PA_NO_INH_THR	= 0x400000	/* across thr_create(3C) */
} pa_flags_t;

/*
 * User-level system call interface prototypes
 */
#ifndef _KERNEL

extern int p_online(processorid_t __processorid, int __flag);
extern int processor_info(processorid_t, processor_info_t *);
extern int processor_bind(idtype_t, id_t, processorid_t, processorid_t *);
extern int processor_affinity(procset_t *, uint_t *, id_t *, uint32_t *);

extern int processor_list(processorid_t *, uint_t *);
extern int processor_group_list(id_t *, uint_t *);
extern int processor_group_processor_list(id_t, processorid_t *, uint_t *);
extern int processor_get_core_chip_pset(processorid_t, id_t *, id_t *,
    id_t *);

extern processorid_t	getcpuid(void);
extern chipid_t		getcacheid(void);
extern lgrpid_t		gethomelgroup(void) __ATTR_DEPRECATED;

#else	/* _KERNEL */

/*
 * Error codes for i_processor_affinity().
 */
typedef enum {
	IPA_INVAL_FLAGS		= 1,
	IPA_INVAL_IDS		= 2,
	IPA_EMPTY_IDS		= 3,
	IPA_INCORRECT_IDS	= 4,
	IPA_BIND_FAILURE	= 5
} i_processor_affinity_err;

/*
 * Internal interface prototypes
 */
extern int p_online_internal(processorid_t, int, int *);
extern int p_online_internal_locked(processorid_t, int, int *);
extern int processor_info(processorid_t, processor_info_t *);
extern int processor_bind(idtype_t, id_t, processorid_t, processorid_t *);
extern int processor_affinity(procset_t *, uint_t *, id_t *, uint32_t *);

extern boolean_t i_processor_affinity_check(kthread_t *, struct cpu *);
extern int i_processor_affinity_one(kthread_t *, id_t, boolean_t);
extern int i_processor_affinity(kthread_t *, uint_t *, id_t *, uint32_t *,
    boolean_t);

#endif /* !_KERNEL */

#ifdef __cplusplus
}
#endif

#endif	/* _SYS_PROCESSOR_H */