77a6b82b27
This merge changes the device switch tables from static array to dynamically generated by config(8). - All device switches is defined as a constant structure in device drivers. - The new grammer ``device-major'' is introduced to ``files''. device-major <prefix> char <num> [block <num>] [<rules>] - All device major numbers must be listed up in port dependent majors.<arch> by using this grammer. - Added the new naming convention. The name of the device switch must be <prefix>_[bc]devsw for auto-generation of device switch tables. - The backward compatibility of loading block/character device switch by LKM framework is broken. This is necessary to convert from block/character device major to device name in runtime and vice versa. - The restriction to assign device major by LKM is completely removed. We don't need to reserve LKM entries for dynamic loading of device switch. - In compile time, device major numbers list is packed into the kernel and the LKM framework will refer it to assign device major number dynamically.
305 lines
7.8 KiB
C
305 lines
7.8 KiB
C
/* $NetBSD: zs_kgdb.c,v 1.2 2002/09/06 13:18:43 gehenna Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Hooks for kgdb when attached via the z8530 driver
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*
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* To use this, build a kernel with: option KGDB, and
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* boot that kernel with "-d". (The kernel will call
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* zs_kgdb_init, kgdb_connect.) When the console prints
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* "kgdb waiting..." you run "gdb -k kernel" and do:
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* (gdb) set remotebaud 19200
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* (gdb) target remote /dev/ttyb
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/syslog.h>
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#include <sys/kgdb.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ic/z8530reg.h>
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#include <machine/z8530var.h>
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static void zs_setparam __P((struct zs_chanstate *, int, int));
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static void zskgdb __P((struct zs_chanstate *));
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struct zsops zsops_kgdb;
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static u_char zs_kgdb_regs[16] = {
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0, /* 0: CMD (reset, etc.) */
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0, /* 1: ~(ZSWR1_RIE | ZSWR1_TIE | ZSWR1_SIE) */
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0, /* IVECT */
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ZSWR3_RX_8 | ZSWR3_RX_ENABLE,
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ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_EVENP,
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ZSWR5_TX_8 | ZSWR5_TX_ENABLE,
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0, /* 6: TXSYNC/SYNCLO */
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0, /* 7: RXSYNC/SYNCHI */
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0, /* 8: alias for data port */
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ZSWR9_MASTER_IE,
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0, /*10: Misc. TX/RX control bits */
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ZSWR11_TXCLK_BAUD | ZSWR11_RXCLK_BAUD,
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((PCLK/32)/38400)-2, /*12: BAUDLO (default=38400) */
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0, /*13: BAUDHI (default=38400) */
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ZSWR14_BAUD_ENA,
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ZSWR15_BREAK_IE,
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};
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/*
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* This replaces "zs_reset()" in the sparc driver.
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*/
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static void
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zs_setparam(cs, iena, rate)
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struct zs_chanstate *cs;
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int iena;
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int rate;
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{
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int s, tconst;
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bcopy(zs_kgdb_regs, cs->cs_preg, 16);
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if (iena) {
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cs->cs_preg[1] = ZSWR1_RIE | ZSWR1_SIE;
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}
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/* Initialize the speed, etc. */
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tconst = BPS_TO_TCONST(cs->cs_brg_clk, rate);
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cs->cs_preg[5] |= ZSWR5_DTR | ZSWR5_RTS;
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cs->cs_preg[12] = tconst;
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cs->cs_preg[13] = tconst >> 8;
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s = splhigh();
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zs_loadchannelregs(cs);
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splx(s);
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}
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#ifndef KGDB_DEVNAME
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#define KGDB_DEVNAME "scca"
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#endif
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char *zs_kgdb_devname = KGDB_DEVNAME;
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/*
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* Set up for kgdb; called at boot time before configuration.
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* KGDB interrupts will be enabled later when zs0 is configured.
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* Called after cninit(), so printf() etc. works.
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*/
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void
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zs_kgdb_init()
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{
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extern const struct cdevsw zstty_cdevsw;
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struct zs_chanstate cs;
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volatile struct zschan *zc;
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int escc, escc_ch, obio, zs_offset;
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int channel = 0;
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u_int32_t reg[5];
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char name[16];
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if ((escc_ch = OF_finddevice(zs_kgdb_devname)) == -1)
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return;
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memset(name, 0, sizeof(name));
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if (OF_getprop(escc_ch, "device_type", name, sizeof(name)) == -1)
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return;
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if (strcmp(name, "serial") != 0)
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return;
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memset(name, 0, sizeof(name));
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if (OF_getprop(escc_ch, "name", name, sizeof(name)) == -1)
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return;
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if (strcmp(name, "ch-b") == 0)
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channel = 1;
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if (OF_getprop(escc_ch, "reg", reg, sizeof(reg)) < 4)
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return;
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zs_offset = reg[0];
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escc = OF_parent(escc_ch);
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obio = OF_parent(escc);
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if (OF_getprop(obio, "assigned-addresses", reg, sizeof(reg)) < 12)
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return;
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zc = (struct zschan *)(reg[2] + zs_offset);
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kgdb_dev = makedev(cdevsw_lookup_major(&zstty_cdevsw), channel);
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printf("zs_kgdb_init: attaching tty%02d at %d baud\n",
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channel, kgdb_rate);
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/* Setup temporary chanstate. */
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bzero((caddr_t)&cs, sizeof(cs));
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cs.cs_channel = channel;
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cs.cs_brg_clk = PCLK / 16;
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cs.cs_reg_csr = &zc->zc_csr;
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cs.cs_reg_data = &zc->zc_data;
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/* Now set parameters. (interrupts disabled) */
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zs_setparam(&cs, 0, kgdb_rate);
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/* Store the getc/putc functions and arg. */
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kgdb_attach(zs_getc, zs_putc, (void *)zc);
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}
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/*
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* This is a "hook" called by zstty_attach to allow the tty
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* to be "taken over" for exclusive use by kgdb.
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* Return non-zero if this is the kgdb port.
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*
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* Set the speed to kgdb_rate, CS8, etc.
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*/
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int
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zs_check_kgdb(cs, dev)
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struct zs_chanstate *cs;
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int dev;
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{
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if (dev != kgdb_dev)
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return (0);
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/*
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* Yes, this is port in use by kgdb.
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*/
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cs->cs_private = NULL;
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cs->cs_ops = &zsops_kgdb;
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/* Now set parameters. (interrupts enabled) */
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zs_setparam(cs, 1, kgdb_rate);
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return (1);
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}
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/*
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* KGDB framing character received: enter kernel debugger. This probably
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* should time out after a few seconds to avoid hanging on spurious input.
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*/
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static void
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zskgdb(cs)
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struct zs_chanstate *cs;
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{
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int unit = minor(kgdb_dev);
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printf("zstty%d: kgdb interrupt\n", unit);
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/* This will trap into the debugger. */
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kgdb_connect(1);
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}
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/****************************************************************
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* Interface to the lower layer (zscc)
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****************************************************************/
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static void zs_kgdb_rxint __P((struct zs_chanstate *));
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static void zs_kgdb_stint __P((struct zs_chanstate *, int));
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static void zs_kgdb_txint __P((struct zs_chanstate *));
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static void zs_kgdb_softint __P((struct zs_chanstate *));
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int kgdb_input_lost;
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static void
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zs_kgdb_rxint(cs)
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struct zs_chanstate *cs;
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{
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register u_char c, rr1;
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/*
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* First read the status, because reading the received char
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* destroys the status of this char.
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*/
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rr1 = zs_read_reg(cs, 1);
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c = zs_read_data(cs);
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if (rr1 & (ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) {
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/* Clear the receive error. */
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zs_write_csr(cs, ZSWR0_RESET_ERRORS);
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}
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if (c == KGDB_START) {
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zskgdb(cs);
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} else {
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kgdb_input_lost++;
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}
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}
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static void
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zs_kgdb_txint(cs)
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register struct zs_chanstate *cs;
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{
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register int rr0;
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rr0 = zs_read_csr(cs);
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zs_write_csr(cs, ZSWR0_RESET_TXINT);
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}
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static void
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zs_kgdb_stint(cs, force)
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register struct zs_chanstate *cs;
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int force;
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{
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register int rr0;
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rr0 = zs_read_csr(cs);
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zs_write_csr(cs, ZSWR0_RESET_STATUS);
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/*
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* Check here for console break, so that we can abort
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* even when interrupts are locking up the machine.
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*/
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if (rr0 & ZSRR0_BREAK) {
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zskgdb(cs);
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}
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}
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static void
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zs_kgdb_softint(cs)
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struct zs_chanstate *cs;
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{
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printf("zs_kgdb_softint?\n");
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}
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struct zsops zsops_kgdb = {
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zs_kgdb_rxint, /* receive char available */
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zs_kgdb_stint, /* external/status */
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zs_kgdb_txint, /* xmit buffer empty */
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zs_kgdb_softint, /* process software interrupt */
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};
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