/* <vms/lib/vadef.h>
 *
 *	LIB - virtual address definitions	[not in Starlet]
 */
#ifndef _VADEF_H
#define _VADEF_H

/*
   virtual address fields
 */
#define VA$V_BYTE	0
#define VA$M_BYTE	0x000001FF
#define VA$S_BYTE	9
#define VA$V_PVPN	9
#define VA$M_PVPN	0x3FFFFE00
#define VA$S_PVPN	21
#define VA$V_P1		30
#define VA$M_P1		0x40000000
#define VA$S_P1		1
#define VA$V_SVPN	9
#define VA$M_SVPN	0x7FFFFE00
#define VA$S_SVPN	22
#define VA$V_SYSTEM	31
#define VA$M_SYSTEM	0x80000000
#define VA$S_SYSTEM	1
#define VA$V_VPG	9
#define VA$M_VPG	0xFFFFFE00
#define VA$S_VPG	23
#define VA$V_VPN	9
#define VA$M_VPN	0x3FFFFE00
#define VA$S_VPN	21

#define VA$S_VADEF	4
/* note: this structure is more elaborate than the one in $VADEF */
union vadef {
    void *va$a_pointer;
    unsigned long va$a_address;
    struct {
	unsigned  va$v_byte	: 9;	/* byte vield */
	unsigned  va$v_pvpn	: 21;	/* process virtual page number */
	unsigned  va$v_p1	: 1;	/* P1 space */
	unsigned		: 1;
    } va$r_process_address;
    struct {
	unsigned  va$v_byte	: 9;	/* byte offset */
	unsigned  va$v_svpn	: 22;	/* system virtual page number */
	unsigned  va$v_system	: 1;	/* system space */
    } va$r_system_address;
    struct {
	unsigned  va$v_byte	: 9;	/* byte offset */
	unsigned  va$v_vpg	: 23;	/* virtual page, including P1 & S */
    } va$r_general_address;
 /* Use of VA$x_VPN in EXTV/EXTZV/INSV instructions should be replaced	 */
 /* with either VA$x_SVPN or VA$x_PVPN, depending on whether the virtual */
 /* address is a System or Process virtual address, respectively.	 */
    struct {
	unsigned  va$v_byte	: 9;	/* byte offset */
	unsigned  va$v_vpn	: 21;	/* virtual page number; use PVPN or SVPN! */
	unsigned		: 2;
    } va$r_unspecified_address;
};

#endif	/*_VADEF_H*/