/*      $NetBSD: boot.c,v 1.20 2014/03/28 15:02:34 christos Exp $       */

/*-
 * Copyright (c) 1999 Izumi Tsutsui.  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 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) 1999 Tsubai Masanari.  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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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 <lib/libkern/libkern.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>

#include <machine/romcall.h>

void boot(uint32_t, uint32_t, uint32_t, uint32_t);
extern void ICIA(void);

/* version strings in vers.c (generated by newvers.sh) */
extern const char bootprog_name[];
extern const char bootprog_rev[];
extern const char bootprog_kernrev[];

char *devs[] = { "hd", "fh", "fd", NULL, NULL, "rd", "st" };
char *kernels[] = { "/netbsd", "/netbsd.gz", NULL };

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

void
boot(uint32_t d4, uint32_t d5, uint32_t d6, uint32_t d7)
{
        int fd, i;
        int ctlr, unit, part, type;
        uint32_t bootdev = d6;
        char *netbsd = (char *)d5;
        u_long marks[MARK_MAX];
        static char devname[32], file[32];
        void (*entry)(void);
        int loadflag;

        printf("%s Secondary Boot, Revision %s (from NetBSD %s)\n",
            bootprog_name, bootprog_rev, bootprog_kernrev);

        /* bootname is "boot" by default. */
        if (netbsd == NULL || strcmp(netbsd, "boot") == 0 ||
                              strcmp(netbsd, "/boot") == 0)
                netbsd = "";

        DPRINTF("howto = 0x%x\n", d7);
        DPRINTF("bootdev = 0x%x\n", bootdev);
        DPRINTF("bootname = %s\n", netbsd);
        DPRINTF("maxmem = 0x%x\n", d4);

#define SET_MAGIC(bootdev, magic) ((bootdev & 0x0fffffff)| (magic << 28))
        /* PROM monitor passes 0xa, but NEWS-OS /boot passed 0x5... */
        bootdev = SET_MAGIC(bootdev, 5);

        ctlr = BOOTDEV_CTLR(bootdev);
        unit = BOOTDEV_UNIT(bootdev);
        part = BOOTDEV_PART(bootdev);
        type = BOOTDEV_TYPE(bootdev);

        marks[MARK_START] = 0;

        if (devs[type] == NULL) {
                printf("unknown bootdev (0x%x)\n", bootdev);
                return;
        }

        snprintf(devname, sizeof(devname),
            "%s(%d,%d,%d)", devs[type], ctlr, unit, part);
        printf("Booting %s%s\n", devname, netbsd);

        /* use user specified kernel name if exists */
        if (*netbsd) {
                kernels[0] = netbsd;
                kernels[1] = NULL;
        }

        loadflag = LOAD_KERNEL;
        if (devname[0] == 'f')  /* XXX */
                loadflag &= ~LOAD_BACKWARDS;

        for (i = 0; kernels[i]; i++) {
                snprintf(file, sizeof(file), "%s%s", devname, kernels[i]);
                DPRINTF("trying %s...\n", file);
                fd = loadfile(file, marks, loadflag);
                if (fd != -1)
                        break;
        }
        if (kernels[i] == NULL) {
#if 0 /* bootxx() may be overrided by loaded kernel */
                return;
#else
                rom_halt();
                /* NOTREACHED */
#endif
        }

        DPRINTF("entry = 0x%x\n", (int)marks[MARK_ENTRY]);
        DPRINTF("ssym = 0x%x\n", (int)marks[MARK_SYM]);
        DPRINTF("esym = 0x%x\n", (int)marks[MARK_END]);

        entry = (void *)marks[MARK_ENTRY];

        printf("\n");

        ICIA();
        __asm volatile ("movl %0,%%d7" : : "m" (d7));
        __asm volatile ("movl %0,%%d6" : : "m" (bootdev));
        __asm volatile ("movl %0,%%d5" : : "m" (netbsd));
        __asm volatile ("movl %0,%%d4" : : "m" (d4));
        __asm volatile ("movl %0,%%d2" : : "m" (marks[MARK_END]));
        (*entry)();
}

void
_rtt(void)
{

        rom_halt();
        for (;;)
                ;
        /* NOTREACHED */
}