[unix-history] / usr / src / sys / tahoe / include / psl.h


/*	psl.h	4.4	84/01/31	*/

/*
 * TAHOE program status longword
 */

#define	PSL_C		0x00000001	/* carry bit */
#define	PSL_V		0x00000002	/* overflow bit */
#define	PSL_Z		0x00000004	/* zero bit */
#define	PSL_N		0x00000008	/* negative bit */
#define	PSL_ALLCC	0x0000000f	/* all cc bits - unlikely */
#define	PSL_T		0x00000010	/* trace enable bit */
#define	PSL_IV		0x00000020	/* integer overflow enable bit */
#define	PSL_FU		0x00000040	/* float underflow enable 	*/
#define PSL_DBL		0x00000080	/* f.p. prescision indicator	*/
#define	PSL_SFE		0x00000100	/* system-forced-exception */
#define	PSL_IPL		0x001f0000	/* interrupt priority level */
#define	PSL_CURMOD	0x01000000	/* current mode (all on is user) */
#define	PSL_IS		0x04000000	/* interrupt stack */
#define	PSL_TP		0x40000000	/* trace pending */

#define	PSL_MBZ		0xbae0ffc0	/* must be zero bits */

#define	PSL_USERSET	(PSL_CURMOD)
#define	PSL_USERCLR	(PSL_IS|PSL_IPL|PSL_MBZ)
Commit	Line	Data
0681b8df SL	1
	2	/* psl.h 4.4 84/01/31 */
	3
	4	/*
	5	* TAHOE program status longword
	6	*/
	7
	8	#define PSL_C 0x00000001 /* carry bit */
	9	#define PSL_V 0x00000002 /* overflow bit */
	10	#define PSL_Z 0x00000004 /* zero bit */
	11	#define PSL_N 0x00000008 /* negative bit */
	12	#define PSL_ALLCC 0x0000000f /* all cc bits - unlikely */
	13	#define PSL_T 0x00000010 /* trace enable bit */
	14	#define PSL_IV 0x00000020 /* integer overflow enable bit */
	15	#define PSL_FU 0x00000040 /* float underflow enable */
	16	#define PSL_DBL 0x00000080 /* f.p. prescision indicator */
	17	#define PSL_SFE 0x00000100 /* system-forced-exception */
	18	#define PSL_IPL 0x001f0000 /* interrupt priority level */
	19	#define PSL_CURMOD 0x01000000 /* current mode (all on is user) */
	20	#define PSL_IS 0x04000000 /* interrupt stack */
	21	#define PSL_TP 0x40000000 /* trace pending */
	22
	23	#define PSL_MBZ 0xbae0ffc0 /* must be zero bits */
	24
	25	#define PSL_USERSET (PSL_CURMOD)
	26	#define PSL_USERCLR (PSL_IS\|PSL_IPL\|PSL_MBZ)