[unix-history] / usr / src / sys / deprecated / netdecnet / dn_systm.h

/*	dn_systm.h	1.3	82/10/09	*/

/*
 * Miscellaneous DECnet definitions for kernel
 */

/*
 * Network types.
 *
 * The DECnet protocols often use unaligned 16 bit fields
 * as integers.  The d_short type represents such a field
 * in a protocol structure definition and the D_SHORT macro
 * extracts such a field given a pointer to the first byte.
 * The AD_SHORT macro assigns to such a field.
 * On the VAX it's easy since unaligned references are
 * allowed, on the 11 it would be a bit harder.
 */
typedef	char	d_short[2];

#if vax
#define	D_SHORT(x)	(*((u_short *)(x)))
#define	AD_SHORT(x, v)	(*((u_short *)(x))) = (v)
#endif

/*
 * The DECnet code, like the Internet code, runs off software
 * interrupts.  At present there is only a software interrupt
 * for the NSP layer, which will hand the data to the socket.
 */
#define	setnspintr()	mtpr(SIRR, 14)
#define	splimp		spl5
Commit	Line	Data
5e3649c6	1	/* dn_systm.h 1.3 82/10/09 */
9cd0498d SL	2
	3	/*
	4	* Miscellaneous DECnet definitions for kernel
	5	*/
	6
	7	/*
	8	* Network types.
	9	*
	10	* The DECnet protocols often use unaligned 16 bit fields
	11	* as integers. The d_short type represents such a field
	12	* in a protocol structure definition and the D_SHORT macro
	13	* extracts such a field given a pointer to the first byte.
	14	* The AD_SHORT macro assigns to such a field.
	15	* On the VAX it's easy since unaligned references are
	16	* allowed, on the 11 it would be a bit harder.
	17	*/
	18	typedef char d_short[2];
	19
	20	#if vax
	21	#define D_SHORT(x) (((u_short )(x)))
	22	#define AD_SHORT(x, v) (((u_short )(x))) = (v)
	23	#endif
	24
	25	/*
	26	* The DECnet code, like the Internet code, runs off software
	27	* interrupts. At present there is only a software interrupt
	28	* for the NSP layer, which will hand the data to the socket.
	29	*/
	30	#define setnspintr() mtpr(SIRR, 14)
	31	#define splimp spl5