/*	$OpenBSD: cpu.h,v 1.74 2006/01/12 22:39:21 weingart Exp $	*/
/*	$NetBSD: cpu.h,v 1.35 1996/05/05 19:29:26 christos Exp $	*/

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)cpu.h	5.4 (Berkeley) 5/9/91
 */

#ifndef _I386_CPU_H_
#define _I386_CPU_H_

/*
 * Definitions unique to i386 cpu support.
 */
#include <machine/frame.h>
#include <machine/psl.h>
#include <machine/segments.h>
#include <machine/intrdefs.h>

#ifdef MULTIPROCESSOR
#include <machine/i82489reg.h>
#include <machine/i82489var.h>

/* XXX for now... */
#define NLAPIC 1

#endif

/*
 * definitions of cpu-dependent requirements
 * referenced in generic code
 */
#define	cpu_swapin(p)			/* nothing */

/*
 * Arguments to hardclock, softclock and statclock
 * encapsulate the previous machine state in an opaque
 * clockframe; for now, use generic intrframe.
 *
 * XXX intrframe has a lot of gunk we don't need.
 */
#define clockframe intrframe

#include <sys/device.h>
#include <sys/lock.h>                  /* will also get LOCKDEBUG */
#include <sys/sched.h>

struct intrsource;

/* XXX stuff to move to cpuvar.h later */
struct cpu_info {
	struct device ci_dev;		/* our device */
	struct cpu_info *ci_self;	/* pointer to this structure */
	struct schedstate_percpu ci_schedstate; /* scheduler state */
	struct cpu_info *ci_next;	/* next cpu */
	
	/* 
	 * Public members. 
	 */
	struct proc *ci_curproc; 	/* current owner of the processor */
	struct simplelock ci_slock;	/* lock on this data structure */
	cpuid_t ci_cpuid; 		/* our CPU ID */
	u_int ci_apicid;		/* our APIC ID */
#if defined(DIAGNOSTIC) || defined(LOCKDEBUG)
	u_long ci_spin_locks;		/* # of spin locks held */
	u_long ci_simple_locks;		/* # of simple locks held */
#endif

	/*
	 * Private members.
	 */
	struct proc *ci_fpcurproc;	/* current owner of the FPU */
	int ci_fpsaving;		/* save in progress */

	volatile u_int32_t ci_tlb_ipi_mask;

	struct pcb *ci_curpcb;		/* VA of current HW PCB */
	struct pcb *ci_idle_pcb;	/* VA of current PCB */
	int ci_idle_tss_sel;		/* TSS selector of idle PCB */

	struct intrsource *ci_isources[MAX_INTR_SOURCES];
	u_int32_t	ci_ipending;
	int		ci_ilevel;
	int		ci_idepth;
	u_int32_t	ci_imask[NIPL];
	u_int32_t	ci_iunmask[NIPL];

	paddr_t ci_idle_pcb_paddr;	/* PA of idle PCB */
	u_long ci_flags;		/* flags; see below */
	u_int32_t ci_ipis; 		/* interprocessor interrupts pending */
	int sc_apic_version;  		/* local APIC version */
	
	u_int32_t	ci_level;
	u_int32_t	ci_vendor[4];
	u_int32_t	ci_signature;		/* X86 cpuid type */
	u_int32_t	ci_feature_flags;	/* X86 CPUID feature bits */
	u_int32_t	cpu_class;		/* CPU class */

	struct cpu_functions *ci_func;	/* start/stop functions */
	void (*cpu_setup)(struct cpu_info *);	/* proc-dependant init */

	int		ci_want_resched;
	int		ci_astpending;

	union descriptor *ci_gdt;
	union descriptor *ci_ldt;	/* per-cpu default LDT */
	int		ci_ldt_len;	/* in bytes */

	volatile int ci_ddb_paused;	/* paused due to other proc in ddb */
#define CI_DDB_RUNNING		0
#define CI_DDB_SHOULDSTOP	1
#define CI_DDB_STOPPED		2
#define CI_DDB_ENTERDDB		3
#define CI_DDB_INDDB		4
};

/*
 * Processor flag notes: The "primary" CPU has certain MI-defined
 * roles (mostly relating to hardclock handling); we distinguish
 * betwen the processor which booted us, and the processor currently
 * holding the "primary" role just to give us the flexibility later to
 * change primaries should we be sufficiently twisted.  
 */

#define	CPUF_BSP	0x0001		/* CPU is the original BSP */
#define	CPUF_AP		0x0002		/* CPU is an AP */
#define	CPUF_SP		0x0004		/* CPU is only processor */
#define	CPUF_PRIMARY	0x0008		/* CPU is active primary processor */
#define	CPUF_APIC_CD	0x0010		/* CPU has apic configured */

#define	CPUF_PRESENT	0x1000		/* CPU is present */
#define	CPUF_RUNNING	0x2000		/* CPU is running */

/*
 * We statically allocate the CPU info for the primary CPU (or,
 * the only CPU on uniprocessors), and the primary CPU is the
 * first CPU on the CPU info list.
 */
extern struct cpu_info cpu_info_primary;
extern struct cpu_info *cpu_info_list;

#define	CPU_INFO_ITERATOR		int
#define	CPU_INFO_FOREACH(cii, ci)	for (cii = 0, ci = cpu_info_list; \
					    ci != NULL; ci = ci->ci_next)

#define CPU_INFO_UNIT(ci)	((ci)->ci_dev.dv_unit)

#ifdef MULTIPROCESSOR

#define I386_MAXPROCS		32	/* because we use a bitmask */

#define CPU_STARTUP(_ci)	((_ci)->ci_func->start(_ci))
#define CPU_STOP(_ci)		((_ci)->ci_func->stop(_ci))
#define CPU_START_CLEANUP(_ci)	((_ci)->ci_func->cleanup(_ci))

#define cpu_number()		(i82489_readreg(LAPIC_ID)>>LAPIC_ID_SHIFT)
#define	curcpu()		(cpu_info[cpu_number()])

#define CPU_IS_PRIMARY(ci)	((ci)->ci_flags & CPUF_PRIMARY)

extern struct cpu_info	*cpu_info[I386_MAXPROCS];
extern u_long		 cpus_running;

extern void cpu_boot_secondary_processors(void);
extern void cpu_init_idle_pcbs(void);

#else /* MULTIPROCESSOR */

#define I386_MAXPROCS		1

#define cpu_number()		0
#define	curcpu()		(&cpu_info_primary)

#define CPU_IS_PRIMARY(ci)	1

/*
 * definitions of cpu-dependent requirements
 * referenced in generic code
 */
#define	cpu_swapin(p)			/* nothing */

#endif

#define curpcb			curcpu()->ci_curpcb

#define want_resched (curcpu()->ci_want_resched)
#define astpending (curcpu()->ci_astpending)

/*
 * Preempt the current process if in interrupt from user mode,
 * or after the current trap/syscall if in system mode.
 */
extern void need_resched(struct cpu_info *);

#define	CLKF_USERMODE(frame)	USERMODE((frame)->if_cs, (frame)->if_eflags)
#define	CLKF_PC(frame)		((frame)->if_eip)
#define	CLKF_INTR(frame)	(IDXSEL((frame)->if_cs) == GICODE_SEL)

/*
 * Give a profiling tick to the current process when the user profiling
 * buffer pages are invalid.  On the i386, request an ast to send us
 * through trap(), marking the proc as needing a profiling tick.
 */
#define	need_proftick(p)	((p)->p_flag |= P_OWEUPC, setsoftast())

/*
 * Notify the current process (p) that it has a signal pending,
 * process as soon as possible.
 */
#define	signotify(p)		setsoftast()

/*
 * We need a machine-independent name for this.
 */
extern void (*delay_func)(int);
struct timeval;
extern void (*microtime_func)(struct timeval *);

#define	DELAY(x)		(*delay_func)(x)
#define delay(x)		(*delay_func)(x)
#define microtime(tv)		(*microtime_func)(tv)

#if defined(I586_CPU) || defined(I686_CPU)
/*
 * High resolution clock support (Pentium only)
 */
void	calibrate_cyclecounter(void);
#ifndef	HZ
extern u_quad_t pentium_base_tsc;
#define CPU_CLOCKUPDATE()						\
	do {								\
		if (pentium_mhz) {					\
			__asm __volatile("cli\n"			\
					 "rdtsc\n"			\
					 "sti\n"			\
					 : "=A" (pentium_base_tsc)	\
					 : );				\
		}							\
	} while (0)
#endif
#endif

/*
 * pull in #defines for kinds of processors
 */
#include <machine/cputypes.h>

struct cpu_nocpuid_nameclass {
	int cpu_vendor;
	const char *cpu_vendorname;
	const char *cpu_name;
	int cpu_class;
	void (*cpu_setup)(struct cpu_info *);
};

struct cpu_cpuid_nameclass {
	const char *cpu_id;
	int cpu_vendor;
	const char *cpu_vendorname;
	struct cpu_cpuid_family {
		int cpu_class;
		const char *cpu_models[CPU_MAXMODEL+2];
		void (*cpu_setup)(struct cpu_info *);
	} cpu_family[CPU_MAXFAMILY - CPU_MINFAMILY + 1];
};

struct cpu_cpuid_feature {
	int feature_bit;
	const char *feature_name;
};

#ifdef _KERNEL
extern int cpu;
extern int cpu_class;
extern int cpu_feature;
extern int cpu_ecxfeature;
extern int cpu_apmwarn;
extern int cpu_apmhalt;
extern int cpuid_level;
extern const struct cpu_nocpuid_nameclass i386_nocpuid_cpus[];
extern const struct cpu_cpuid_nameclass i386_cpuid_cpus[];

#if defined(I586_CPU) || defined(I686_CPU)
extern int pentium_mhz;
#endif

#ifdef I586_CPU
/* F00F bug fix stuff for pentium cpu */
extern int cpu_f00f_bug;
void fix_f00f(void);
#endif

/* dkcsum.c */
void	dkcsumattach(void);

extern int i386_use_fxsave;
extern int i386_has_sse;
extern int i386_has_sse2;

extern void (*update_cpuspeed)(void);

/* machdep.c */
void	dumpconf(void);
void	cpu_reset(void);
void	i386_proc0_tss_ldt_init(void);
void	i386_init_pcb_tss_ldt(struct cpu_info *);
void	cpuid(u_int32_t, u_int32_t *);

/* locore.s */
struct region_descriptor;
void	lgdt(struct region_descriptor *);
void	fillw(short, void *, size_t);

struct pcb;
void	savectx(struct pcb *);
void	switch_exit(struct proc *);
void	proc_trampoline(void);

/* clock.c */
void	initrtclock(void);
void	startrtclock(void);
void	rtcdrain(void *);
void	i8254_delay(int);
void	i8254_microtime(struct timeval *);
void	i8254_initclocks(void);

/* est.c */
#if !defined(SMALL_KERNEL) && defined(I686_CPU)
void	est_init(const char *);
int     est_setperf(int);
#endif

/* longrun.c */
#if !defined(SMALL_KERNEL) && defined(I586_CPU)
void	longrun_init(void);
int	longrun_setperf(int);
#endif

/* p4tcc.c */
#if !defined(SMALL_KERNEL) && defined(I686_CPU)
void	p4tcc_init(int, int);
int     p4tcc_setperf(int);
#endif

#if !defined(SMALL_KERNEL) && defined(I586_CPU)
/* powernow.c */
void	k6_powernow_init(void);
int	k6_powernow_setperf(int);
#endif
#if !defined(SMALL_KERNEL) && defined(I686_CPU)
/* powernow-k7.c */
void	k7_powernow_init(void);
int	k7_powernow_setperf(int);
/* powernow-k8.c */
void 	k8_powernow_init(void);
int 	k8_powernow_setperf(int);
#endif

/* npx.c */
void	npxdrop(struct proc *);
void	npxsave_proc(struct proc *, int);
void	npxsave_cpu(struct cpu_info *, int);

#if defined(GPL_MATH_EMULATE)
/* math_emulate.c */
int	math_emulate(struct trapframe *);
#endif

#ifdef USER_LDT
/* sys_machdep.h */
extern int user_ldt_enable;
int	i386_get_ldt(struct proc *, void *, register_t *);
int	i386_set_ldt(struct proc *, void *, register_t *);
#endif

/* isa_machdep.c */
void	isa_defaultirq(void);
void	isa_nodefaultirq(void);
int	isa_nmi(void);

/* pmap.c */
void	pmap_bootstrap(vaddr_t);

/* vm_machdep.c */
int	kvtop(caddr_t);

#ifdef VM86
/* vm86.c */
void	vm86_gpfault(struct proc *, int);
#endif /* VM86 */

#ifdef GENERIC
/* swapgeneric.c */
void	setconf(void);
#endif /* GENERIC */

#endif /* _KERNEL */

/* 
 * CTL_MACHDEP definitions.
 */
#define	CPU_CONSDEV		1	/* dev_t: console terminal device */
#define	CPU_BIOS		2	/* BIOS variables */
#define	CPU_BLK2CHR		3	/* convert blk maj into chr one */
#define	CPU_CHR2BLK		4	/* convert chr maj into blk one */
#define CPU_ALLOWAPERTURE	5	/* allow mmap of /dev/xf86 */
#define CPU_CPUVENDOR		6	/* cpuid vendor string */
#define CPU_CPUID		7	/* cpuid */
#define CPU_CPUFEATURE		8	/* cpuid features */
#define CPU_APMWARN		9	/* APM battery warning percentage */
#define CPU_KBDRESET		10	/* keyboard reset under pcvt */
#define CPU_APMHALT		11	/* halt -p hack */
#define CPU_USERLDT		12
#define CPU_OSFXSR		13	/* uses FXSAVE/FXRSTOR */
#define CPU_SSE			14	/* supports SSE */
#define CPU_SSE2		15	/* supports SSE2 */
#define CPU_XCRYPT		16	/* supports VIA xcrypt in userland */
#define CPU_MAXID		17	/* number of valid machdep ids */

#define	CTL_MACHDEP_NAMES { \
	{ 0, 0 }, \
	{ "console_device", CTLTYPE_STRUCT }, \
	{ "bios", CTLTYPE_INT }, \
	{ "blk2chr", CTLTYPE_STRUCT }, \
	{ "chr2blk", CTLTYPE_STRUCT }, \
	{ "allowaperture", CTLTYPE_INT }, \
	{ "cpuvendor", CTLTYPE_STRING }, \
	{ "cpuid", CTLTYPE_INT }, \
	{ "cpufeature", CTLTYPE_INT }, \
	{ "apmwarn", CTLTYPE_INT }, \
	{ "kbdreset", CTLTYPE_INT }, \
	{ "apmhalt", CTLTYPE_INT }, \
	{ "userldt", CTLTYPE_INT }, \
	{ "osfxsr", CTLTYPE_INT }, \
	{ "sse", CTLTYPE_INT }, \
	{ "sse2", CTLTYPE_INT }, \
	{ "xcrypt", CTLTYPE_INT }, \
}

/*
 * This needs to be included late since it relies on definitions higher
 * up in this file.
 */
#if defined(MULTIPROCESSOR) && defined(_KERNEL)
#include <sys/mplock.h>
#endif

#endif /* !_I386_CPU_H_ */