#sccs	"@(#)uts/kern/sys:vmmac.h	1.1"

/*	Convergent Technologies - System V - May 1983	*/

#ifndef vmmac_h
#define vmmac_h

#include <sys/param.h>
#include <sys/pte.h>

/*
 * Virtual memory related conversion macros
 */

/* Virtual page numbers to text|data|stack|kvmem|shlib segment page numbers and back */
#define	vtotp(p, v)	((int)((v) - SYSPAGE))
#define	vtodp(p, v)	((int)((v) - ((p)->p_tpage) - SYSPAGE))
#define	vtosp(p, v)	((int)((MAXUMEM-1) - (v)))
#define vtoldp(v)	((int)((v) - SHLIB_VPAGE0))
#define vtoltp(v)	((int)((v) - sl_tbase))
#define vtovp(v)	((int)((v) - KVMEM_VPAGE0))

#define	tptov(p, i)	((unsigned)((i) + SYSPAGE))
#define	dptov(p, i)	((unsigned)((i) + ((p)->p_tpage) + SYSPAGE))
#define	sptov(p, i)	((unsigned)((MAXUMEM-1) - (i)))
#define ldptov(i)	((unsigned)((i) + SHLIB_VPAGE0))
#define ltptov(i)	((unsigned)((i) + sl_tbase))
#define vptov(i)	((unsigned)((i) + KVMEM_VPAGE0))

/* Tell whether virtual page numbers are in text|data|stack|kvmem|shlib segment */
#define	isassv(p, v)	(((v) < MAXUMEM) && \
		((v) >= (MAXUMEM - (p)->p_ssize)))
#define	isatsv(p, v)	(((v) - SYSPAGE) < (p)->p_tsize)
#define	isadsv(p, v)	(((v) - SYSPAGE) >= ((p)->p_tpage) && \
		((v) - SYSPAGE - ((p)->p_tpage) < (p)->p_dsize))
#define isaldsv(v)	(((v) >= SHLIB_VPAGE0) && \
				((v) < (SHLIB_VPAGE0+sl_lsize)))
#define isaltsv(v)	(((v) >= sl_tbase) && \
				((v) < (sl_tbase+sl_text.x_size)))
#define isavsv(v)	(((v) >= KVMEM_VPAGE0) && \
			 (((v) - KVMEM_VPAGE0) < kv_pages))

/* Tell whether pte's are text|data|stack|kvmem|shlib */
#define	isaspte(p, pte)		((int)(pte - (struct mpte *) VPTE_BASE) >= \
				 ((p)->p_tsize + (p)->p_lsize + (p)->p_dsize))
#define	isatpte(p, pte)		((pte >= (struct mpte *) VPTE_BASE) && \
				 ((int)(pte - (struct mpte *) VPTE_BASE) < \
				  (p)->p_tsize))
#define	isadpte(p, pte)		(((int)(pte - (struct mpte *) VPTE_BASE) >= \
				  ((p)->p_tsize + (p)->p_lsize)) && \
				 ((int)(pte - (struct mpte *) VPTE_BASE) < \
				  ((p)->p_tsize + (p)->p_lsize + (p)->p_dsize)))
#define isaldpte(p, pte)	(((int)(pte - (struct mpte *) VPTE_BASE) >= \
				  (p)->p_tsize) && \
				 ((int)(pte - (struct mpte *) VPTE_BASE) < \
				  ((p)->p_tsize + (p)->p_lsize)))
#define isaltpte(pte)		((pte >= sl_mpte) && \
				 ((pte - sl_mpte) < sl_text.x_size))
#define isavpte(pte)		((pte >= kv_mpte) && \
				 ((pte - kv_mpte) < kv_pages))

/* Text|data|stack|kvmem|shlib  pte's to segment page numbers and back */
#define	ptetotp(p, pte)		((int)(pte - (struct mpte *) VPTE_BASE))
#define	ptetodp(p, pte)		((int)(pte - (struct mpte *) VPTE_BASE) \
		- (p)->p_tsize - (p)->p_lsize)
#define	ptetosp(p, pte)		(((p)->p_tsize + (p)->p_lsize + (p)->p_dsize + (p)->p_ssize - 1) \
				- (int)(pte - (struct mpte *) VPTE_BASE))
#define ptetoldp(p, pte)	((int)(pte - (struct mpte *) VPTE_BASE) \
		- (p)->p_tsize)
#define ptetoltp(pte)		((int)(pte - sl_mpte))
#define ptetovp(pte)		((int)(pte - kv_mpte))

#define	tptopte(p, i)		((struct mpte *)(((i)<<2) + VPTE_BASE))
#define	dptopte(p, i)		((struct mpte *) \
		((((i) + ((p)->p_tsize + (p)->p_lsize))<<2) + VPTE_BASE))
#define	sptopte(p, i) 		((struct mpte *) \
		(((((p)->p_tsize + (p)->p_lsize + (p)->p_dsize + (p)->p_ssize - 1) - (i)) << 2) + VPTE_BASE))
#define	ldptopte(p, i) 		((struct mpte *) \
		((((p)->p_tsize + (i)) << 2) + VPTE_BASE))
#define ltptopte(i)		(&sl_mpte[i])
#define vptopte(i)		(&kv_mpte[i])

#define ctopt(x)	(x)

/* Bytes to pages without rounding, and back */
#define	btop(x)		(((unsigned)(x)) >> PGSHIFT)
#define	ptob(x)		((caddr_t)((x) << PGSHIFT))

/* given size in clicks, how many pages of U are needed to map it */
#define szupage(sz)	(((sz) > PTE_BANK0) ? UPAGES + 1 : UPAGES)

/* Average new into old with aging factor time */
#define	ave(smooth, cnt, time) \
	smooth = ((time - 1) * (smooth) + (cnt)) / (time)

#endif vmmac_h