/*      $NetBSD: boot.c,v 1.32 2025/01/13 17:33:10 tsutsui Exp $        */

/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* ELF support derived from NetBSD/alpha's boot loader, written
* by Christopher G. Demetriou.
*
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/

/*
* First try for the boot code
*
* Input syntax is:
*      [promdev[{:|,}partition]]/[filename] [flags]
*/

#include "boot.h"

#include <sys/param.h>
#include <sys/boot_flag.h>
#include <sys/disklabel.h>

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

#include "ofdev.h"
#include "openfirm.h"

extern void __syncicache(void *, size_t); /* in libkern */


#ifdef DEBUG
# define DPRINTF printf
#else
# define DPRINTF while (0) printf
#endif

char bootdev[MAXBOOTPATHLEN];
extern char bootfile[MAXBOOTPATHLEN];
int boothowto;
bool floppyboot;
int ofw_version = 0;

static const char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.macppc", NULL };

static void
prom2boot(char *dev)
{
       char *cp;

       DPRINTF("%s: bootpath from OF: \"%s\"\n", __func__, dev);
       cp = dev + strlen(dev) - 1;
       for (; *cp; cp--) {
               if (*cp == ':') {
                       if (ofw_version < 3) {
                               /* sd@0:0 -> sd@0 */
                               *cp = 0;
                               break;
                       } else {
                               /*
                                * OpenBIOS v1.1 on qemu-system-ppc emulates
                                * Open Firmware 3.x but it also recognizes
                                * pmBootEntry info in the Apple Partition Map
                                * like old Open Firmware 1.x/2.x machines.
                                * In such case, the OpenBIOS passes
                                * "/[boot device]/disk@0:,%BOOT"
                                * for bootpath strings, but it looks
                                * the OpenBIOS doesn't recognize
                                * partition info in "disk@0:0" format.
                                * So just remove file arg strings without
                                * adding partition info in such case.
                                */
                               if (cp[1] == ',') {
                                       /* just drop extra ",[bootfile]" */
                                       cp[1] = '\0';
                               } else {
                                       /* disk@0:5,boot -> disk@0:0 */
                                       strcpy(cp, ":0");
                               }
                               break;
                       }
               }
       }
       DPRINTF("%s: bootpath patched: \"%s\"\n", __func__, dev);
}

static void
parseargs(char *str, int *howtop)
{
       char *cp;

       /* Allow user to drop back to the PROM. */
       if (strcmp(str, "exit") == 0)
               OF_exit();

       *howtop = 0;

       cp = str;
       if (*cp == '-')
               goto found;
       for (cp = str; *cp; cp++)
               if (*cp == ' ')
                       goto found;
       return;

found:
       *cp++ = 0;
       while (*cp)
               BOOT_FLAG(*cp++, *howtop);
}

static bool
is_floppyboot(const char *path, const char *defaultdev)
{
       char dev[MAXBOOTPATHLEN];
       char nam[16];
       int handle, rv;

       if (parsefilepath(path, dev, NULL, NULL)) {
               if (dev[0] == '\0' && defaultdev != NULL)
                       strlcpy(dev, defaultdev, sizeof(dev));

               /* check properties */
               handle = OF_finddevice(dev);
               if (handle != -1) {
                       rv = OF_getprop(handle, "name", nam, sizeof(nam));
                       if (rv >= 0 &&
                           (strcmp(nam, "swim3") == 0 ||
                            strcmp(nam, "floppy") == 0))
                               return true;
               }

               /* also check devalias */
               if (strcmp(dev, "fd") == 0)
                       return true;
       }

       return false;
}

static void
chain(boot_entry_t entry, char *args, void *ssym, void *esym)
{
       extern char end[];
       int l;

#if !defined(HEAP_VARIABLE)
       freeall();
#endif

       /*
        * Stash pointer to end of symbol table after the argument
        * strings.
        */
       l = strlen(args) + 1;
       memcpy(args + l, &ssym, sizeof(ssym));
       l += sizeof(ssym);
       memcpy(args + l, &esym, sizeof(esym));
       l += sizeof(esym);
       l += sizeof(int);       /* XXX */

       OF_chain((void *) RELOC, end - (char *) RELOC, entry, args, l);
       panic("chain");
}

__dead void
_rtt(void)
{

       OF_exit();
}

void
main(void)
{
       extern char bootprog_name[], bootprog_rev[];
       char bootline[512];             /* Should check size? */
       char prop[32];
       char *cp;
       u_long marks[MARK_MAX];
       u_int32_t entry;
       void *ssym, *esym;

       printf("\n");
       printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);

       /*
        * Figure out what version of Open Firmware...
        */
       if (ofw_openprom != -1) {
               memset(prop, 0, sizeof prop);
               OF_getprop(ofw_openprom, "model", prop, sizeof prop);
               for (cp = prop; *cp; cp++)
                       if (*cp >= '0' && *cp <= '9') {
                               ofw_version = *cp - '0';
                               break;
                       }
               printf(">> Open Firmware version %d.x\n", ofw_version);
       }
       printf(">> Open Firmware running in %s-mode.\n",
           ofw_real_mode ? "real" : "virtual");

       /*
        * Get the boot arguments from Openfirmware
        */
       if (OF_getprop(ofw_chosen, "bootpath", bootdev, sizeof bootdev) < 0 ||
           OF_getprop(ofw_chosen, "bootargs", bootline, sizeof bootline) < 0) {
               printf("Invalid Openfirmware environment\n");
               OF_exit();
       }

       /*
        * Some versions of Openfirmware sets bootpath to "".
        * We use boot-device instead if it occurs.
        */
       if (bootdev[0] == 0) {
               printf("Cannot use bootpath\n");
               if (ofw_options == -1 ||
                   OF_getprop(ofw_options, "boot-device", bootdev,
                              sizeof bootdev) < 0) {
                       printf("Invalid Openfirmware environment\n");
                       OF_exit();
               }
               printf("Using boot-device instead\n");
       }

       prom2boot(bootdev);
       parseargs(bootline, &boothowto);
       DPRINTF("bootline=%s\n", bootline);

       for (;;) {
               int i, loadflag;

               if (boothowto & RB_ASKNAME) {
                       printf("Boot: ");
                       kgets(bootline, sizeof(bootline));
                       parseargs(bootline, &boothowto);
               }

               if (bootline[0]) {
                       kernels[0] = bootline;
                       kernels[1] = NULL;
               }

               for (i = 0; kernels[i]; i++) {
                       floppyboot = is_floppyboot(kernels[i], bootdev);

                       DPRINTF("Trying %s%s\n", kernels[i],
                           floppyboot ? " (floppyboot)" : "");

                       loadflag = LOAD_KERNEL;
                       if (floppyboot)
                               loadflag &= ~LOAD_BACKWARDS;

                       marks[MARK_START] = 0;
                       if (loadfile(kernels[i], marks, loadflag) >= 0)
                               goto loaded;
               }
               boothowto |= RB_ASKNAME;
       }
loaded:

#ifdef  __notyet__
       OF_setprop(ofw_chosen, "bootpath", opened_name,
                  strlen(opened_name) + 1);
       cp = bootline;
#else
       strcpy(bootline, opened_name);
       cp = bootline + strlen(bootline);
       *cp++ = ' ';
#endif
       *cp = '-';
       if (boothowto & RB_ASKNAME)
               *++cp = 'a';
       if (boothowto & RB_USERCONF)
               *++cp = 'c';
       if (boothowto & RB_SINGLE)
               *++cp = 's';
       if (boothowto & RB_KDB)
               *++cp = 'd';
       if (*cp == '-')
#ifdef  __notyet__
               *cp = 0;
#else
               *--cp = 0;
#endif
       else
               *++cp = 0;
#ifdef  __notyet__
       OF_setprop(ofw_chosen, "bootargs", bootline, strlen(bootline) + 1);
#endif

       entry = marks[MARK_ENTRY];
       ssym = (void *)marks[MARK_SYM];
       esym = (void *)marks[MARK_END];

       printf(" start=0x%x\n", entry);
       __syncicache((void *)(uintptr_t)entry, (size_t)ssym - entry);
       chain((boot_entry_t)(uintptr_t)entry, bootline, ssym, esym);

       OF_exit();
}

#ifdef HAVE_CHANGEDISK_HOOK
void
changedisk_hook(struct open_file *of)
{
       struct of_dev *op = of->f_devdata;
       int c;

       OF_call_method("eject", op->handle, 0, 0, NULL);

       c = getchar();
       if (c == 'q') {
               printf("quit\n");
               OF_exit();
       }

       OF_call_method("close", op->handle, 0, 0, NULL);
       OF_call_method("open", op->handle, 0, 0, NULL);
}
#endif

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