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/* $OpenBSD: boot.c,v 1.23 2013/12/28 02:51:07 deraadt Exp $ */
/*
* Copyright (c) 2004 Opsycon AB, www.opsycon.se.
*
* 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 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 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 <stand.h>
#include <mips64/arcbios.h>
#include <mips64/cpu.h>
#include <sys/exec_elf.h>
#undef ELFSIZE
#include "loadfile.h"
char *strstr(char *, const char *); /* strstr.c */
int main(int, char **);
void dobootopts(int, char **);
enum {
AUTO_NONE,
AUTO_YES,
AUTO_NO,
AUTO_MINI,
AUTO_DEBUG
} bootauto = AUTO_NONE;
char *OSLoadPartition = NULL;
char *OSLoadFilename = NULL;
int IP;
char rnddata[BOOTRANDOM_MAX]; /* XXX dummy */
#include "version"
/*
* OpenBSD/sgi Boot Loader.
*/
void
boot_main(int argc, char *argv[])
{
u_long marks[MARK_MAX];
u_int64_t *esym;
char line[1024];
u_long entry;
int fd;
extern int arcbios_init(void);
IP = arcbios_init();
printf("\nOpenBSD/sgi-IP%d ARCBios boot version %s\n", IP, version);
/* we want to print IP20 but load IP22 */
if (IP == 20)
IP = 22;
for (entry = 0; entry < argc; entry++)
printf("arg %d: %s\n", entry, argv[entry]);
dobootopts(argc, argv);
if (OSLoadPartition == NULL) {
/*
* Things are probably horribly wrong, or user has no idea
* what's he's doing. Be nice lads and try to provide
* working defaults, which ought to work on all systems.
*/
OSLoadPartition = "disk(0)part(0)";
}
strlcpy(line, OSLoadPartition, sizeof(line));
if (OSLoadFilename != NULL)
strlcat(line, OSLoadFilename, sizeof(line));
printf("Boot: %s\n", line);
/*
* Load the kernel and symbol table.
*/
marks[MARK_START] = 0;
if ((fd = loadfile(line, marks, LOAD_KERNEL | COUNT_KERNEL)) != -1) {
(void)close(fd);
entry = marks[MARK_ENTRY];
#ifdef __LP64__
esym = (u_int64_t *)marks[MARK_END];
#else
#undef CKSEG0_BASE
#define CKSEG0_BASE 0xffffffff80000000ULL
esym = (u_int64_t *)(uint32_t)PHYS_TO_CKSEG0(marks[MARK_END]);
#endif
if (entry != 0)
((void (*)())entry)(argc, argv, esym);
}
/* We failed to load the kernel. */
panic("Boot FAILED!");
}
__dead void
_rtt()
{
Bios_EnterInteractiveMode();
for (;;) ;
}
/*
* Decode boot options.
*/
void
dobootopts(int argc, char **argv)
{
static char filenamebuf[1 + 32];
char *SystemPartition = NULL;
char *cp, *sep;
int i;
char *writein = NULL;
for (i = 1; i < argc; i++) {
cp = argv[i];
if (cp == NULL)
continue;
if (strncmp(cp, "OSLoadOptions=", 14) == 0) {
if (strcmp(&cp[14], "auto") == 0)
bootauto = AUTO_YES;
else if (strcmp(&cp[14], "single") == 0)
bootauto = AUTO_NO;
else if (strcmp(&cp[14], "mini") == 0)
bootauto = AUTO_MINI;
else if (strcmp(&cp[14], "debug") == 0)
bootauto = AUTO_DEBUG;
} else if (strncmp(cp, "OSLoadPartition=", 16) == 0)
OSLoadPartition = &cp[16];
else if (strncmp(cp, "OSLoadFilename=", 15) == 0)
OSLoadFilename = &cp[15];
else if (strncmp(cp, "SystemPartition=", 16) == 0)
SystemPartition = &cp[16];
else {
/*
* Either a boot-related environment variable, or
* a boot write-in (boot path or options to the
* program being loaded).
*/
if (*cp == '-')
continue; /* options */
if (strchr(cp, '=') != NULL)
continue; /* variable (or bad choice */
/* of filename) */
if (writein == NULL)
writein = cp;
}
}
switch (bootauto) {
case AUTO_NONE:
/* If "OSLoadOptions=" is missing, use boot path if given. */
if (writein != NULL) {
/* check for a possible path component */
sep = strchr(writein, '(');
if (sep != NULL && strchr(sep, ')') != NULL) {
/* looks like this is a full path */
OSLoadPartition = "";
} else {
/* relative path, keep OSLoadPartition */
}
OSLoadFilename = writein;
}
break;
case AUTO_MINI:
{
static char loadpart[64];
char *p;
strlcpy(loadpart, argv[0], sizeof loadpart);
if ((p = strstr(loadpart, "partition(8)")) != NULL) {
p += strlen("partition(");
} else if (strncmp(loadpart, "dksc(", 5) == 0) {
p = strstr(loadpart, ",8)");
if (p != NULL)
p++;
} else
p = NULL;
if (p != NULL) {
p[0] = '0';
p[2] = '\0';
snprintf(filenamebuf, sizeof filenamebuf,
"/bsd.rd.IP%d", IP);
OSLoadPartition = loadpart;
OSLoadFilename = filenamebuf;
}
}
break;
default:
break;
}
}
/*
* Prevent loading a wrong kernel.
*/
int
check_phdr(void *v)
{
Elf64_Phdr *phdr = (Elf64_Phdr *)v;
uint64_t addr;
switch (IP) {
case 22:
addr = 0xffffffff88000000ULL >> 24;
break;
case 26:
addr = 0xa800000008000000ULL >> 24;
break;
case 27:
addr = 0xa800000000000000ULL >> 24;
break;
case 28:
case 30:
addr = 0xa800000020000000ULL >> 24;
break;
case 32:
addr = 0xffffffff80000000ULL >> 24;
break;
default:
/*
* If the system could not be identified, accept any
* address and hope the user knows what's he's doing.
*/
return 0;
}
if ((phdr->p_vaddr >> 24) != addr) {
/* I'm sorry Dave, I can't let you do that. */
printf("This kernel does not seem to be compiled for this"
" machine type.\nYou need to boot an IP%d kernel.\n", IP);
return 1;
}
return 0;
}
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