155103Storek /* 2*63318Sbostic * Copyright (c) 1992, 1993 3*63318Sbostic * The Regents of the University of California. All rights reserved. 455103Storek * 555103Storek * This software was developed by the Computer Systems Engineering group 655103Storek * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 755103Storek * contributed to Berkeley. 855103Storek * 955499Sbostic * All advertising materials mentioning features or use of this software 1055499Sbostic * must display the following acknowledgement: 1155499Sbostic * This product includes software developed by the University of 1259184Storek * California, Lawrence Berkeley Laboratory. 1355499Sbostic * 1455103Storek * %sccs.include.redist.c% 1555103Storek * 16*63318Sbostic * @(#)bsd_audiovar.h 8.1 (Berkeley) 06/11/93 1755103Storek * 1859184Storek * from: $Header: bsd_audiovar.h,v 1.6 92/11/21 20:46:49 van Exp $ (LBL) 1955103Storek */ 2055103Storek 2155103Storek #define AUCB_SIZE 4096 2255103Storek #define AUCB_MOD(k) ((k) & (AUCB_SIZE - 1)) 2355103Storek 2455103Storek #define AUCB_INIT(cb) ((cb)->cb_head = (cb)->cb_tail = (cb)->cb_drops = \ 2555103Storek (cb)->cb_pdrops = 0) 2655103Storek 2755103Storek #define AUCB_EMPTY(cb) ((cb)->cb_head == (cb)->cb_tail) 2855103Storek #define AUCB_FULL(cb) (AUCB_MOD((cb)->cb_tail + 1) == (cb)->cb_head) 2955103Storek #define AUCB_LEN(cb) (AUCB_MOD((cb)->cb_tail - (cb)->cb_head)) 3055103Storek 3155103Storek #define MAXBLKSIZE (AUCB_SIZE / 2) 3255103Storek #define DEFBLKSIZE 128 3355103Storek 3455103Storek #ifndef LOCORE 3555103Storek /* 3655103Storek * aucb's are used for communication between the trap handler and 3755103Storek * the software interrupt. 3855103Storek */ 3955103Storek struct aucb { 4055103Storek int cb_head; /* queue head */ 4155103Storek int cb_tail; /* queue tail */ 4255103Storek int cb_thresh; /* threshold for wakeup */ 4355103Storek u_short cb_waking; /* needs wakeup at softint level */ 4455103Storek u_short cb_pause; /* io paused */ 4555103Storek u_long cb_drops; /* missed samples from over/underrun */ 4655103Storek u_long cb_pdrops; /* sun compat -- paused samples */ 4755103Storek u_char cb_data[AUCB_SIZE]; /* data buffer */ 4855103Storek }; 4955103Storek 5055103Storek #if !defined(__STDC__) && !defined(volatile) 5155103Storek #define volatile 5255103Storek #endif 5359184Storek #if !defined(__STDC__) && !defined(const) 5459184Storek #define const 5559184Storek #endif 5655103Storek 5755103Storek struct auio { 5855103Storek volatile struct amd7930 *au_amd;/* chip registers */ 5955103Storek u_long au_stamp; /* time stamp */ 6055103Storek int au_lowat; /* xmit low water mark (for wakeup) */ 6155103Storek int au_hiwat; /* xmit high water mark (for wakeup) */ 6255103Storek int au_blksize; /* recv block (chunk) size */ 6359184Storek int au_backlog; /* # samples of xmit backlog to gen. */ 6455103Storek struct aucb au_rb; /* read (recv) buffer */ 6555103Storek struct aucb au_wb; /* write (xmit) buffer */ 6655103Storek }; 6755103Storek #endif 68