/*      $NetBSD: boot.c,v 1.8 2011/02/20 07:52:43 matt Exp $    */

/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jonathan Stone, Michael Hitch and Simon Burge.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

/*
* Copyright (c) 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
*      @(#)boot.c      8.1 (Berkeley) 6/10/93
*/

#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>
#include <lib/libkern/libkern.h>

#include <sys/param.h>
#include <sys/exec.h>
#include <sys/exec_elf.h>
#include <sys/boot_flag.h>

#include <dev/arcbios/arcbios.h>

#include "common.h"
#include "bootinfo.h"

#ifdef BOOT_DEBUG
#define DPRINTF if (debug) printf
#else
#define DPRINTF while (/*CONSTCOND*/0) printf
#endif

/*
* We won't go overboard with gzip'd kernel names.  After all we can
* still boot a gzip'd kernel called "netbsd.arc" - it doesn't need
* the .gz suffix.
*
* For arcane reasons, the first byte of the first element of this struct will
* contain a zero.  We therefore start from one.
*/

char *kernelnames[] = {
       "placekeeper",
       "netbsd.arc",
       "netbsd",
       "netbsd.gz",
       "netbsd.bak",
       "netbsd.old",
       "onetbsd",
       "gennetbsd",
       NULL
};

static int debug = 0;
static char **environment;

/* Storage must be static. */
struct btinfo_symtab bi_syms;
struct btinfo_bootpath bi_bpath;

static char bootinfo[BOOTINFO_SIZE];

int main(int, char **);
static char *firmware_getenv(char *);

/*
* This gets arguments from the ARCS monitor, calls ARCS routines to open
* and load the program to boot, then transfers execution to the new program.
*
* argv[0] will be the ARCS path to the bootloader (i.e.,
* "scsi(0)disk(2)rdisk(0)partition(1)\boot").
*
* argv[1] through argv[n] will contain arguments passed from the PROM, if any.
*/

int
main(int argc, char **argv)
{
       const char     *kernel = NULL;
       const char     *bootpath = NULL;
       char            bootfile[PATH_MAX];
       void            (*entry)(int, char *[], u_int, void *);
       u_long          marks[MARK_MAX];
       int             win = 0;
       int             i;
       int             ch;

       /* print a banner */
       printf("\n");
       printf("%s Bootstrap, Revision %s\n", bootprog_name, bootprog_rev);

       memset(marks, 0, sizeof marks);

       /* initialise bootinfo structure early */
       bi_init(bootinfo);

#ifdef BOOT_DEBUG
       for (i = 0; i < argc; i++)
               printf("argv[%d] = %s\n", i, argv[i]);
#endif

       /* Parse arguments, if present.  */
       while ((ch = getopt(argc, argv, "v")) != -1) {
               switch (ch) {
               case 'v':
                       debug = 1;
                       break;
               }
       }

       environment = &argv[1];

       bootpath = firmware_getenv("OSLoadPartition");
       if (bootpath == NULL)
               bootpath =
                   arcbios_GetEnvironmentVariable("OSLoadPartition");

       if (bootpath == NULL) {
               /* XXX need to actually do the fixup */
               printf("OSLoadPartition is not specified.\n");
               return 0;
       }
       DPRINTF("bootpath = %s\n", bootpath);

       /*
        * Grab OSLoadFilename from ARCS.
        */

       kernel = firmware_getenv("OSLoadFilename");
       if (kernel == NULL)
               kernel = arcbios_GetEnvironmentVariable("OSLoadFilename");

       DPRINTF("kernel = %s\n", kernel ? kernel : "<null>");

       /*
        * The first arg is assumed to contain the name of the kernel to boot,
        * if it a) does not start with a hyphen and b) does not contain
        * an equals sign.
        */

       for (i = 1; i < argc; i++) {
               if (((strchr(argv[i], '=')) == NULL) && (argv[i][0] != '-')) {
                       kernel = argv[i];
                       break;
               }
       }

       if (kernel != NULL) {
               /*
                * if the name contains parenthesis, we assume that it
                * contains the bootpath and ignore anything passed through
                * the environment
                */
               if (strchr(kernel, '('))
                       win = loadfile(kernel, marks, LOAD_KERNEL);
               else {
                       strcpy(bootfile, bootpath);
                       strcat(bootfile, kernel);
                       win = loadfile(bootfile, marks, LOAD_KERNEL);
               }

       } else {
               i = 1;
               while (kernelnames[i] != NULL) {
                       strcpy(bootfile, bootpath);
                       strcat(bootfile, kernelnames[i]);
                       kernel = kernelnames[i];
                       win = loadfile(bootfile, marks, LOAD_KERNEL);
                       if (win != -1)
                               break;
                       i++;
               }

       }

       if (win < 0) {
               printf("Boot failed!  Halting...\n");
               (void)getchar();
               return 0;
       }

       strlcpy(bi_bpath.bootpath, kernel, BTINFO_BOOTPATH_LEN);
       bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath));

       bi_syms.nsym = marks[MARK_NSYM];
       bi_syms.ssym = marks[MARK_SYM];
       bi_syms.esym = marks[MARK_END];
       bi_add(&bi_syms, BTINFO_SYMTAB, sizeof(bi_syms));

       entry = (void *)marks[MARK_ENTRY];

       if (debug) {
               printf("Starting at %p\n\n", entry);
               printf("nsym 0x%lx ssym 0x%lx esym 0x%lx\n", marks[MARK_NSYM],
                      marks[MARK_SYM], marks[MARK_END]);
       }
       (*entry)(argc, argv, BOOTINFO_MAGIC, bootinfo);

       printf("Kernel returned!  Halting...\n");
       return 0;
}

char *
firmware_getenv(char *envname)
{
       char **env;
       int len;

       len = strlen(envname);

       for (env = environment; env[0]; env++) {
               if (strncasecmp(envname, env[0], len) == 0 &&
                   env[0][len] == '=') {
                       return &env[0][len + 1];
               }
       }
       return NULL;
}

void
_rtt(void)
{

       arcbios_Halt();
}

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