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


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