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/* $OpenBSD: machdep.c,v 1.9 2023/02/23 19:48:22 miod Exp $ */
/*
* Copyright (c) 2010 Miodrag Vallat.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Copyright (c) 1998-2004 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <lib/libkern/libkern.h>
#include "libsa.h"
#include <machine/cpu.h>
#include <machine/pmon.h>
#include <stand/boot/cmd.h>
void gdium_abort(void);
int is_gdium;
int boot_rd;
extern int bootprompt;
/*
* Configuration and device path aerobics
*/
/*
* Return the default boot device.
*/
void
devboot(dev_t dev, char *path)
{
const char *bootpath = NULL;
size_t bootpathlen = 0; /* gcc -Wall */
const char *tmp;
int i;
/*
* If we are booting the initrd image, things are easy...
*/
if (dev != 0) {
strlcpy(path, "rd0a", BOOTDEVLEN);
return;
}
/*
* First, try to figure where we have been loaded from; we'll assume
* the default device to load the kernel from is the same.
*
* We may have been loaded in three different ways:
* - automatic load from `al' environment variable (similar to a
* `load' and `go' sequence).
* - manual `boot' command, with path on the commandline.
* - manual `load' and `go' commands, with no path on the commandline.
*/
if (pmon_argc > 0) {
tmp = (const char *)pmon_getarg(0);
if (tmp[0] != 'g') {
/* manual load */
for (i = 1; i < pmon_argc; i++) {
tmp = (const char *)pmon_getarg(i);
if (tmp[0] != '-') {
bootpath = tmp;
break;
}
}
} else {
/* possible automatic load */
bootpath = pmon_getenv("al");
}
}
/*
* If the bootblocks have been loaded from the network,
* use the default disk.
*/
if (bootpath != NULL && strncmp(bootpath, "tftp://", 7) == 0)
bootpath = NULL;
/*
* Now extract the device name from the bootpath.
*/
if (bootpath != NULL) {
tmp = strchr(bootpath, '@');
if (tmp == NULL) {
bootpath = NULL;
} else {
bootpath = tmp + 1;
tmp = strchr(bootpath, '/');
if (tmp == NULL) {
bootpath = NULL;
} else {
bootpathlen = tmp - bootpath;
}
}
}
if (bootpath != NULL && bootpathlen >= 3) {
if (bootpathlen >= BOOTDEVLEN)
bootpathlen = BOOTDEVLEN - 1;
strncpy(path, bootpath, bootpathlen);
path[bootpathlen] = '\0';
/* only add a partition letter if there is none */
if (bootpath[bootpathlen - 1] >= '0' &&
bootpath[bootpathlen - 1] <= '9')
strlcat(path, "a", BOOTDEVLEN);
} else {
strlcpy(path, "wd0a", BOOTDEVLEN);
}
}
/*
* Ugly (lack of) clock routines
*/
time_t
getsecs()
{
return 0;
}
/*
* Initialization
*/
void
machdep()
{
const char *envvar;
/*
* Since we can't have non-blocking input, we will try to
* autoload the kernel pointed to by the `bsd' environment
* variable, and fallback to interactive mode if the variable
* is empty or the load fails.
*/
if (boot_rd == 0) {
envvar = pmon_getenv("bsd");
if (envvar != NULL) {
bootprompt = 0;
kernelfile = (char *)envvar;
} else {
if (is_gdium)
gdium_abort();
}
}
}
int
main()
{
const char *envvar;
cninit();
/*
* Figure out whether we are running on a Gdium system, which
* has an horribly castrated PMON. If we do, the best we can do
* is boot an initrd image.
*/
envvar = pmon_getenv("Version");
if (envvar != NULL && strncmp(envvar, "Gdium", 5) == 0)
is_gdium = 1;
/*
* Check if we have a valid initrd loaded.
*/
envvar = pmon_getenv("rd");
if (envvar != NULL && *envvar != '\0')
boot_rd = rd_isvalid();
if (boot_rd != 0)
bootprompt = 0;
boot(boot_rd);
return 0;
}
void
gdium_abort()
{
/* Here's a nickel, kid. Get yourself a better firmware */
printf("\n\nSorry, OpenBSD boot blocks do not work on Gdium, "
"because of dire firmware limitations.\n"
"Also, the firmware has reset the USB controller so you "
"will need to power cycle.\n"
"We would apologize for this inconvenience, but we have "
"no control about the firmware of your machine.\n\n");
rd_invalidate();
_rtt();
}
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