typedef struct Conf	Conf;
typedef struct FPU	FPU;
typedef struct FPenv	FPenv;
typedef struct FPsave	FPsave;
typedef struct Label	Label;
typedef struct Lock	Lock;
typedef struct MMU	MMU;
typedef struct Mach	Mach;
typedef struct Notsave	Notsave;
typedef struct Page	Page;
typedef struct PMMU	PMMU;
typedef struct Proc	Proc;
typedef struct Ureg	Ureg;
typedef struct Vctl	Vctl;
typedef struct PhysUart	PhysUart;
typedef struct Uart	Uart;

/*
 *  parameters for sysproc.c
 */
#define AOUT_MAGIC	(E_MAGIC)

struct Lock
{
	ulong	key;
	ulong	sr;
	ulong	pc;
	Proc	*p;
	ushort	isilock;
};

struct Label
{
	ulong	sp;
	ulong	pc;
};

/*
 * FPsave.status
 */
enum
{
	FPinit,
	FPactive,
	FPinactive,
};
struct	FPsave
{
	ulong	status;
	ulong	control;
	ulong	regs[8][3];	/* emulated fp */	
};

struct Conf
{
	ulong	nmach;		/* processors */
	ulong	nproc;		/* processes */
	ulong	npage0;		/* total physical pages of memory */
	ulong	npage1;		/* total physical pages of memory */
	ulong	npage;		/* total physical pages of memory */
	ulong	upages;		/* user page pool */
	ulong	nimage;		/* number of page cache image headers */
	ulong	nswap;		/* number of swap pages */
	int	nswppo;		/* max # of pageouts per segment pass */
	ulong	base0;		/* base of bank 0 */
	ulong	base1;		/* base of bank 1 */
	ulong	copymode;	/* 0 is copy on write, 1 is copy on reference */
	int	monitor;
	ulong	ialloc;		/* bytes available for interrupt time allocation */
	ulong	pipeqsize;	/* size in bytes of pipe queues */
};

/*
 *  MMU stuff in proc
 */
enum
{
	NCOLOR=	1,	/* 1 level cache, don't worry about VCE's */
	Nmeg=	32,	/* maximum size of user space */
};

struct PMMU
{
	Page	*l1page[Nmeg];	/* this's process' level 1 entries */
	ulong	l1table[Nmeg];	/* ... */
	Page	*mmufree;	/* free mmu pages */
};

/*
 *  things saved in the Proc structure during a notify
 */
struct Notsave
{
	int dummy;
};

#include "../port/portdat.h"

struct Mach
{
	int	machno;			/* physical id of processor */
	ulong	splpc;			/* pc of last caller to splhi */

	Proc	*proc;			/* current process */
	ulong	mmupid;			/* process id currently in mmu & cache */

	ulong	ticks;			/* of the clock since boot time */
	Label	sched;			/* scheduler wakeup */
	Lock	alarmlock;		/* access to alarm list */
	void*	alarm;			/* alarms bound to this clock */

	ulong	fairness;		/* for runproc */

	/* stats */
	int	tlbfault;
	int	tlbpurge;
	int	pfault;
	int	cs;
	int	syscall;
	int	load;
	int	intr;
	vlong	fastclock;		/* last sampled value */
	vlong	intrts;			/* time stamp of last interrupt */
	ulong	spuriousintr;
	int	lastintr;

	int	flushmmu;		/* make current proc flush it's mmu state */
	Proc	*pid2proc[31];		/* what proc holds what pid */
	int	lastpid;		/* highest assigned pid slot */

	int	cpumhz;			/* speed of cpu */
	int	cpuhz;			/* ... *

	/* save areas for exceptions */
	ulong	sfiq[5];
	ulong	sirq[5];
	ulong	sund[5];
	ulong	sabt[5];

	int	stack[1];
};

typedef struct Cycintr	Cycintr;

/*
 * fasttick timer interrupts
 */
struct Cycintr
{
	vlong	when;			/* fastticks when f should be called */
	void	(*f)(Ureg*, Cycintr*);
	void	*a;
	Cycintr	*next;
};

/*
 * Fake kmap since we direct map dram
 */
typedef void		KMap;
#define	VA(k)		((ulong)(k))
#define	kmap(p)		(KMap*)((p)->pa)
#define	kunmap(k)

struct
{
	Lock;
	int	machs;			/* bitmap of active CPUs */
	int	exiting;		/* shutdown */
	int	ispanic;		/* shutdown in response to a panic */
}active;

#define	MACHP(n)	((Mach *)(MACHADDR+(n)*BY2PG))

extern Mach	*m;
extern Proc	*up;

enum
{
	OneMeg=	1024*1024,
};