c2f9d95de5
'three-stage' bootstrap. There are a number of caveats with the code in its current state: - The i386 bootstrap only supports booting from a floppy. - The kernel and kld do not yet know how to deal with the extended information and module summary passed in. - PnP-based autodetection and demand loading of modules is not implemented. - i386 ELF kernel loading is not ready yet. - The i386 bootstrap is loaded via an ugly blockmap. On the alpha, both net- and disk-booting (SRM console machines only) is supported. No blockmaps are used by this code. Obtained from: Parts from the NetBSD/i386 standalone bootstrap.
143 lines
3.9 KiB
C
143 lines
3.9 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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#include <stand.h>
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#include <string.h>
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#include "bootstrap.h"
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/*
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* Core console support
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*/
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static int cons_set(struct env_var *ev, int flags, void *value);
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static int cons_find(char *name);
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/*
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* Detect possible console(s) to use. The first probed console
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* is marked active. Also create the console variable.
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*
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* XXX Add logic for multiple console support.
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*/
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void
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cons_probe(void)
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{
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int cons;
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int active;
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/* Do all console probes, make the fist fully functional console active */
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for (cons = 0, active = -1; consoles[cons] != NULL; cons++) {
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consoles[cons]->c_flags = 0;
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consoles[cons]->c_probe(consoles[cons]);
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if ((consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT)) && (active == -1)) {
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consoles[cons]->c_flags |= (C_ACTIVEIN | C_ACTIVEOUT);
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active = cons;
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}
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}
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printf("Console: %s\n", consoles[active]->c_desc);
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env_setenv("console", 0, consoles[active]->c_name, cons_set, env_nounset);
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}
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int
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getchar(void)
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{
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int cons;
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int rv;
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/* Loop forever polling all active consoles */
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for(;;)
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for (cons = 0; consoles[cons] != NULL; cons++)
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if ((consoles[cons]->c_flags & C_ACTIVEIN) &&
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((rv = consoles[cons]->c_in()) != -1))
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return(rv);
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}
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int
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ischar(void)
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{
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int cons;
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for (cons = 0; consoles[cons] != NULL; cons++)
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if ((consoles[cons]->c_flags & C_ACTIVEIN) &&
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(consoles[cons]->c_ready() != 0))
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return(1);
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return(0);
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}
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void
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putchar(int c)
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{
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int cons;
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/* Expand newlines */
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if (c == '\n')
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putchar('\r');
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for (cons = 0; consoles[cons] != NULL; cons++)
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if (consoles[cons]->c_flags & C_ACTIVEOUT)
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consoles[cons]->c_out(c);
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}
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static int
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cons_find(char *name)
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{
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int cons;
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for (cons = 0; consoles[cons] != NULL; cons++)
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if (!strcmp(consoles[cons]->c_name, name))
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return(cons);
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return(-1);
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}
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/*
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* Select a console.
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*
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* XXX Note that the console system design allows for some extension
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* here (eg. multiple consoles, input/output only, etc.)
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*/
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static int
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cons_set(struct env_var *ev, int flags, void *value)
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{
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int cons, active;
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if ((active = cons_find(value)) == -1) {
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printf("no such console '%s'\n", (char *)value);
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return(CMD_ERROR);
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}
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/* disable all current consoles */
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for (cons = 0; consoles[cons] != NULL; cons++)
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consoles[cons]->c_flags &= ~(C_ACTIVEIN | C_ACTIVEOUT);
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/* enable selected console */
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consoles[active]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT;
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env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
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return(CMD_OK);
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}
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