/*      $OpenBSD: exec.c,v 1.5 2022/08/10 12:20:05 miod Exp $   */

/*
 * Copyright (c) 2010 Miodrag Vallat.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/param.h>
#include <sys/reboot.h>
#include <machine/cpu.h>
#include <machine/pmon.h>
#include "libsa.h"
#include <lib/libsa/loadfile.h>

typedef void (*program)(int32_t, int32_t, int32_t *, int32_t, uint64_t *);

#define PTR_TO_CKSEG1(ptr)      (int32_t)(CKSEG1_BASE | (uint64_t)(ptr))

void
run_loadfile(uint64_t *marks, int howto)
{
        int32_t newargc;
        int32_t *newargv;
        char kernelflags[8];
        char *c;
        const char *arg;

        /*
         * Build a new commandline:
         * boot <device kernel is loaded from> -<kernel options>
         */

        newargc = howto == 0 ? 2 : 3;
        newargv = alloc(newargc * sizeof(int32_t));
        if (newargv == NULL)
                panic("out of memory");

        arg = "boot";   /* kernel needs this. */
        newargv[0] = PTR_TO_CKSEG1(arg);
        newargv[1] = PTR_TO_CKSEG1(&pmon_bootdev);
        if (howto != 0) {
                c = kernelflags;
                *c++ = '-';
                if (howto & RB_ASKNAME)
                        *c++ = 'a';
                if (howto & RB_CONFIG)
                        *c++ = 'c';
                if (howto & RB_KDB)
                        *c++ = 'd';
                if (howto & RB_GOODRANDOM)
                        *c++ = 'g';
                if (howto & RB_SINGLE)
                        *c++ = 's';
                *c = '\0';
                newargv[2] = PTR_TO_CKSEG1(&kernelflags);
        }

        pmon_cacheflush();

        (*(program)(marks[MARK_ENTRY]))(newargc, PTR_TO_CKSEG1(newargv),
            pmon_envp, pmon_callvec,
            (uint64_t *)PHYS_TO_CKSEG0(marks[MARK_END]));

        rd_invalidate();
        _rtt();
}