* Copyright (c) 1999 Izumi Tsutsui. All rights reserved.

/* $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 */
}