/*      $NetBSD: boot.c,v 1.21 2019/09/03 14:18:32 martin Exp $ */

/*
 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * 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. 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.
 */

#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>
#include <lib/libkern/libkern.h>
#include <sys/reboot.h>
#include <sys/boot_flag.h>
#include <machine/bootinfo.h>
#include <machine/cpu.h>
#include <machine/residual.h>
#include <powerpc/spr.h>
#include <powerpc/oea/spr.h>

#include "boot.h"
#include "sdvar.h"

char *names[] = {
#ifdef SCSI_SUPPORT
        "sd(0,0,0)netbsd", "sd(0,0,0)onetbsd",
#endif
        "in()",
};
#define NUMNAMES (sizeof (names) / sizeof (names[0]))

#define NAMELEN 128
char namebuf[NAMELEN];
char nametmp[NAMELEN];

char bootinfo[BOOTINFO_MAXSIZE];
struct btinfo_residual btinfo_residual;
struct btinfo_console btinfo_console;
struct btinfo_clock btinfo_clock;

RESIDUAL residual;

extern u_long ns_per_tick;
extern char bootprog_name[], bootprog_rev[];

void boot(void *, u_long);
static void exec_kernel(char *);

void
boot(void *resp, u_long loadaddr)
{
        extern char _end[], _edata[];
        int n = 0;
        int addr, speed;
        unsigned int cpuvers;
        char *name, *cnname, *p;

        /* Clear all of BSS */
        memset(_edata, 0, _end - _edata);

        /*
         * console init
         */
        cnname = cninit(&addr, &speed);
#ifdef VGA_RESET
        vga_reset((u_char *)0xc0000000);
#endif

        /* make bootinfo */
        /*
         * residual data
         */
        btinfo_residual.common.next = sizeof(btinfo_residual);
        btinfo_residual.common.type = BTINFO_RESIDUAL;
        if (resp) {
                memcpy(&residual, resp, sizeof(residual));
                btinfo_residual.addr = (void *)&residual;
        } else {
                printf("Warning: no residual data.\n");
                btinfo_residual.addr = 0;
        }

        /*
         * console
         */
        btinfo_console.common.next = sizeof(btinfo_console);
        btinfo_console.common.type = BTINFO_CONSOLE;
        strcpy(btinfo_console.devname, cnname);
        btinfo_console.addr = addr;
        btinfo_console.speed = speed;

        /*
         * clock
         */
        __asm volatile ("mfpvr %0" : "=r"(cpuvers));
        cpuvers >>= 16;
        btinfo_clock.common.next = 0;
        btinfo_clock.common.type = BTINFO_CLOCK;
        if (cpuvers == MPC601) {
                btinfo_clock.ticks_per_sec = 1000000000;
        } else {
                btinfo_clock.ticks_per_sec = resp ?
                    residual.VitalProductData.ProcessorBusHz/4 : TICKS_PER_SEC;
        }
        ns_per_tick = 1000000000 / btinfo_clock.ticks_per_sec;

        p = bootinfo;
        memcpy(p, (void *)&btinfo_residual, sizeof(btinfo_residual));
        p += sizeof(btinfo_residual);
        memcpy(p, (void *)&btinfo_console, sizeof(btinfo_console));
        p += sizeof(btinfo_console);
        memcpy(p, (void *)&btinfo_clock, sizeof(btinfo_clock));

        /*
         * load kernel if attached
         */
        init_in(loadaddr);

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

#ifdef SCSI_SUPPORT
        /*
         * Initialize siop@pci0 dev 16 func 0
         */
        siop_init(0, 16, 0);
#endif

        for (;;) {
                name = names[n++];
                if (n >= NUMNAMES)
                        n = 0;

                exec_kernel(name);
        }
}

/*
 * Exec kernel
 */
static void
exec_kernel(char *name)
{
        int howto = 0;
        char c, *ptr;
        u_long marks[MARK_MAX];
#ifdef DBMONITOR
        int go_monitor;
        extern int db_monitor(void);

ret:
#endif /* DBMONITOR */
        printf("\nBoot: ");
        memset(namebuf, 0, sizeof (namebuf));
        if (tgets(namebuf) == -1)
                printf("\n");

        ptr = namebuf;
#ifdef DBMONITOR
        go_monitor = 0;
        if (*ptr == '!') {
                if (*(++ptr) == NULL) {
                        db_monitor();
                        printf("\n");
                        goto ret;
                } else {
                        go_monitor++;
                }
        }
#endif /* DBMONITOR */
        while ((c = *ptr)) {
                while (c == ' ')
                        c = *++ptr;
                if (!c)
                        goto next;
                if (c == '-') {
                        while ((c = *++ptr) && c != ' ')
                                BOOT_FLAG(c, howto);
                } else {
                        name = ptr;
                        while ((c = *++ptr) && c != ' ');
                        if (c)
                                *ptr++ = 0;
                }
        }

next:
        printf("Loading %s", name);
        if (howto)
                printf(" (howto 0x%x)", howto);
        printf("\n");

        marks[MARK_START] = 0;
        if (loadfile(name, marks, LOAD_ALL) == 0) {
#ifdef DBMONITOR
                if (go_monitor) {
                        db_monitor();
                        printf("\n");
                }
#endif /* DBMONITOR */

                printf("start=0x%lx\n\n", marks[MARK_ENTRY]);
                delay(1000);
                __syncicache((void *)marks[MARK_ENTRY],
                        (u_int)marks[MARK_SYM] - (u_int)marks[MARK_ENTRY]);

                run((void *)marks[MARK_SYM],
                    (void *)marks[MARK_END],
                    (void *)howto,
                    (void *)bootinfo,
                    (void *)marks[MARK_ENTRY]);
        }
}

void
_rtt(void)
{

        /* XXXX */
        __unreachable();
}