Separate out the stuff used to get in and out of the PROM monitor.
This file can be shared between the sun3 and sun3x.
This commit is contained in:
gwr
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/* $NetBSD: sunmon.c,v 1.1 1997/01/21 00:04:37 gwr 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 Adam Glass and 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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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.h>
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#include <machine/mon.h>
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#include <machine/pte.h>
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#include <sun3/sun3/interreg.h>
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#include <sun3/sun3/vector.h>
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#include <sun3/sun3/sunmon.h>
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/* XXX - Hmmm... */
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#ifdef sun3
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#include <sun3/sun3/machdep.h>
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#endif
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#ifdef sun3x
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#include <sun3x/sun3x/machdep.h>
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#endif
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static void **sunmon_vbr;
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static void tracedump __P((int));
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static void v_handler __P((int addr, char *str));
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/*
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* Prepare for running the PROM monitor
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*/
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static void
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_mode_monitor __P((void))
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{
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/* Disable our level-5 clock. */
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set_clk_mode(0, IREG_CLOCK_ENAB_5, 0);
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/* Restore the PROM vector table */
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setvbr(sunmon_vbr);
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/* Enable the PROM NMI clock. */
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set_clk_mode(IREG_CLOCK_ENAB_7, 0, 1);
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/* XXX - Disable watchdog action? */
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}
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/*
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* Prepare for running the kernel
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*/
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static void
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_mode_kernel __P((void))
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{
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/* Disable the PROM NMI clock. */
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set_clk_mode(0, IREG_CLOCK_ENAB_7, 0);
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/* Restore our own vector table */
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setvbr(vector_table);
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/* Enable our level-5 clock. */
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set_clk_mode(IREG_CLOCK_ENAB_5, 0, 1);
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}
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/*
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* This function takes care of restoring enough of the
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* hardware state to allow the PROM to run normally.
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* The PROM needs: NMI enabled, it's own vector table.
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* In case of a temporary "drop into PROM", this will
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* also put our hardware state back into place after
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* the PROM "c" (continue) command is given.
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*/
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void sunmon_abort()
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{
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int s = splhigh();
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_mode_monitor();
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mon_printf("kernel stop: enter c to continue or g0 to panic\n");
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delay(100000);
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/*
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* Drop into the PROM in a way that allows a continue.
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* That's what the PROM function (romp->abortEntry) is for,
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* but that wants to be entered as a trap hander, so just
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* stuff it into the PROM interrupt vector for trap zero
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* and then do a trap. Needs PROM vector table in RAM.
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*/
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sunmon_vbr[32] = romVectorPtr->abortEntry;
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asm(" trap #0 ; _sunmon_continued: nop");
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/* We have continued from a PROM abort! */
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_mode_kernel();
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splx(s);
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}
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void sunmon_halt()
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{
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(void) splhigh();
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_mode_monitor();
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#ifdef sun3x
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loadcrp(&mon_crp);
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#endif
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mon_exit_to_mon();
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/*NOTREACHED*/
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}
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/*
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* Caller must pass a string that is in our data segment.
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*/
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void sunmon_reboot(bs)
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char *bs;
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{
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#ifdef DIAGNOSTIC
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extern char end[];
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if (bs > end)
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bs = "?";
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#endif
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(void) splhigh();
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_mode_monitor();
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#ifdef sun3x
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loadcrp(&mon_crp);
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#endif
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mon_reboot(bs);
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mon_exit_to_mon();
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/*NOTREACHED*/
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}
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/*
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* Print out a traceback for the caller - can be called anywhere
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* within the kernel or from the monitor by typing "g4" (for sun-2
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* compatibility) or "w trace". This causes the monitor to call
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* the v_handler() routine which will call tracedump() for these cases.
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*/
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struct funcall_frame {
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struct funcall_frame *fr_savfp;
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int fr_savpc;
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int fr_arg[1];
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};
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/*VARARGS0*/
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static void
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tracedump(x1)
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int x1;
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{
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struct funcall_frame *fp = (struct funcall_frame *)(&x1 - 2);
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u_int stackpage = ((u_int)fp) & ~PGOFSET;
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mon_printf("Begin traceback...fp = %x\n", fp);
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do {
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if (fp == fp->fr_savfp) {
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mon_printf("FP loop at %x", fp);
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break;
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}
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mon_printf("Called from %x, fp=%x, args=%x %x %x %x\n",
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fp->fr_savpc, fp->fr_savfp,
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fp->fr_arg[0], fp->fr_arg[1], fp->fr_arg[2], fp->fr_arg[3]);
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fp = fp->fr_savfp;
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} while ( (((u_int)fp) & ~PGOFSET) == stackpage);
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mon_printf("End traceback...\n");
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}
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/*
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* Handler for monitor vector cmd -
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* For now we just implement the old "g0" and "g4"
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* commands and a printf hack. [lifted from freed cmu mach3 sun3 port]
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*/
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static void
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v_handler(addr, str)
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int addr;
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char *str;
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{
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switch (*str) {
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case '\0':
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/*
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* No (non-hex) letter was specified on
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* command line, use only the number given
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*/
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switch (addr) {
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case 0: /* old g0 */
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case 0xd: /* 'd'ump short hand */
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_mode_kernel();
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panic("zero");
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/*NOTREACHED*/
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case 4: /* old g4 */
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goto do_trace;
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default:
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goto err;
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}
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break;
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case 'p': /* 'p'rint string command */
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case 'P':
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mon_printf("%s\n", (char *)addr);
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break;
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case '%': /* p'%'int anything a la printf */
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mon_printf(str, addr);
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mon_printf("\n");
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break;
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do_trace:
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case 't': /* 't'race kernel stack */
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case 'T':
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tracedump(addr);
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break;
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case 'u': /* d'u'mp hack ('d' look like hex) */
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case 'U':
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goto err;
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break;
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default:
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err:
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mon_printf("Don't understand 0x%x '%s'\n", addr, str);
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}
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}
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/*
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* Set the PROM vector handler (for g0, g4, etc.)
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* and set boothowto from the PROM arg strings.
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*
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* Note, args are always:
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* argv[0] = boot_device (i.e. "sd(0,0,0)")
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* argv[1] = options (i.e. "-ds" or NULL)
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* argv[2] = NULL
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*/
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void
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sunmon_init()
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{
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MachMonRomVector *rvec;
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MachMonBootParam *bpp;
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char **argp;
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char *p;
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/* Save the PROM monitor Vector Base Register (VBR). */
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sunmon_vbr = getvbr();
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rvec = romVectorPtr;
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if (rvec->romvecVersion >= 2)
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*rvec->vector_cmd = v_handler;
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/* Set boothowto flags from PROM args. */
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bpp = *rvec->bootParam;
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argp = bpp->argPtr;
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/* Skip argp[0] (the device string) */
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argp++;
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/* Have options? */
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if (*argp == NULL)
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return;
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p = *argp;
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if (*p == '-') {
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/* yes, parse options */
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#ifdef DEBUG
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mon_printf("boot option: %s\n", p);
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#endif
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for (++p; *p; p++) {
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switch (*p) {
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case 'a':
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boothowto |= RB_ASKNAME;
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break;
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case 's':
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boothowto |= RB_SINGLE;
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break;
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case 'd':
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boothowto |= RB_KDB;
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break;
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}
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}
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argp++;
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}
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#ifdef DEBUG
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/* Have init name? */
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if (*argp == NULL)
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return;
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p = *argp;
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mon_printf("boot initpath: %s\n", p);
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#endif
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}
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@ -0,0 +1,44 @@
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/* $NetBSD: sunmon.h,v 1.1 1997/01/21 00:04:38 gwr 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 Adam Glass and 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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void sunmon_init __P((void));
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void sunmon_abort __P((void));
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void sunmon_halt __P((void));
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void sunmon_reboot __P((char *));
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