9b9cce6084
* Make the ring buffer size and water marks patchable, and allocate the buffer separately. * Do the ttymalloc() at attach time. * Reorganize the receive buffer so the status and data pair are next to each other. This is slightly faster. * Make sure we actually do turn off interrupts in comclose() if we have DDB configured and it's not the console. (D'oh!!!!) * When we exhaust the current transmit run, turn off transmit interrupts in comintr(), so we're fairly sure we don't get another one. * Nuke the silly lsrmap[] idea; it's slower in the normal case. * Cache the l_rint pointer in the soft interrupt routine.
130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/* $NetBSD: comvar.h,v 1.19 1997/11/03 06:55:54 mycroft Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "rnd.h"
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#if NRND > 0 && defined(RND_COM)
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#include <sys/rnd.h>
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#endif
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int comcnattach __P((bus_space_tag_t, int, int, int, tcflag_t));
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#ifdef KGDB
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int com_kgdb_attach __P((bus_space_tag_t, int, int, int, tcflag_t));
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#endif
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int com_is_console __P((bus_space_tag_t, int, bus_space_handle_t *));
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/* Hardware flag masks */
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#define COM_HW_NOIEN 0x01
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#define COM_HW_FIFO 0x02
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#define COM_HW_HAYESP 0x04
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#define COM_HW_FLOW 0x08
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#define COM_HW_CONSOLE 0x40
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#define COM_HW_KGDB 0x80
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/* Buffer size for character buffer */
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#define COM_RING_SIZE 2048
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struct com_softc {
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struct device sc_dev;
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void *sc_si;
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struct tty *sc_tty;
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int sc_iobase; /* XXX ISA-centric name */
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int sc_frequency;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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bus_space_handle_t sc_hayespioh;
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u_int sc_overflows,
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sc_floods,
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sc_errors;
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int sc_hwflags,
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sc_swflags;
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u_int sc_fifolen;
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u_int sc_r_hiwat,
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sc_r_lowat;
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u_char *volatile sc_rbget,
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*volatile sc_rbput;
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volatile u_int sc_rbavail;
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u_char *sc_rbuf,
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*sc_ebuf;
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u_char *sc_tba;
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u_int sc_tbc,
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sc_heldtbc;
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volatile u_char sc_rx_flags,
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#define RX_TTY_BLOCKED 0x01
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#define RX_TTY_OVERFLOWED 0x02
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#define RX_IBUF_BLOCKED 0x04
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#define RX_IBUF_OVERFLOWED 0x08
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#define RX_ANY_BLOCK 0x0f
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sc_tx_busy,
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sc_tx_done,
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sc_tx_stopped,
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sc_st_check,
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sc_rx_ready;
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volatile u_char sc_heldchange;
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volatile u_char sc_msr, sc_msr_delta, sc_msr_mask, sc_mcr,
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sc_mcr_active, sc_lcr, sc_ier, sc_fifo, sc_dlbl, sc_dlbh, sc_efr;
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u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd;
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#if NRND > 0 && defined(RND_COM)
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rndsource_element_t rnd_source;
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#endif
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};
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/* Macros to clear/set/test flags. */
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#define SET(t, f) (t) |= (f)
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#define CLR(t, f) (t) &= ~(f)
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#define ISSET(t, f) ((t) & (f))
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int comprobe1 __P((bus_space_tag_t, bus_space_handle_t, int));
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int comintr __P((void *));
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void com_attach_subr __P((struct com_softc *));
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int cominit __P((bus_space_tag_t, int, int, int, tcflag_t,
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bus_space_handle_t *));
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#ifndef __GENERIC_SOFT_INTERRUPTS
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#ifdef alpha
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#define IPL_SERIAL IPL_TTY
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#define splserial() spltty()
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#define IPL_SOFTSERIAL IPL_TTY
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#define splsoftserial() spltty()
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#endif
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#endif
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