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      1 /*	$NetBSD: iris_boot.c,v 1.1 2019/01/12 16:44:47 tsutsui Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2018 Naruaki Etomi
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 /*
     29  * Silicon Graphics "IRIS" series MIPS processors machine bootloader.
     30  *
     31  * Notes:
     32  *   The amount of physical memory space available to
     33  *   the system is 3661820 (0x80002000 - 0x8037fffc) bytes.
     34  *   This space is too tight for kernel and bootloader.
     35  *   So we keep it simple.
     36  */
     37 
     38 #include <lib/libsa/stand.h>
     39 #include <lib/libsa/loadfile.h>
     40 #include <lib/libkern/libkern.h>
     41 
     42 #include <sys/param.h>
     43 #include <sys/exec.h>
     44 #include <sys/exec_elf.h>
     45 #include <sys/boot_flag.h>
     46 
     47 #ifndef	INDIGO_R3K_MODE
     48 #include <dev/arcbios/arcbios.h>
     49 #endif
     50 
     51 #include "iris_machdep.h"
     52 
     53 #include "common.h"
     54 #include "bootinfo.h"
     55 
     56 int main(int, char **);
     57 
     58 /* Storage must be static. */
     59 struct btinfo_symtab bi_syms;
     60 struct btinfo_bootpath bi_bpath;
     61 
     62 static uint8_t bootinfo[BOOTINFO_SIZE];
     63 
     64 /*
     65  * This gets arguments from the PROM monitor.
     66  * argv[0] will be path to the bootloader (i.e., "dksc(X,Y,8)/bootiris").
     67  *
     68  * argv[1] through argv[n] will contain arguments passed from the PROM, if any.
     69  */
     70 
     71 int
     72 main(int argc, char **argv)
     73 {
     74 	char kernelname[1 + 32];
     75 	void (*entry) (int, char *[], int, void *);
     76 	u_long marks[MARK_MAX];
     77 	int win = 0;
     78 	int zs_addr, speed;
     79 
     80 	cninit(&zs_addr, &speed);
     81 
     82  	/* print a banner */
     83 	printf("\n");
     84 	printf("%s " NETBSD_VERS " Yet another Bootstrap, Revision %s\n",
     85 	    bootprog_name, bootprog_rev);
     86 	printf("\n");
     87 
     88 	memset(marks, 0, sizeof marks);
     89 
     90 	/* initialise bootinfo structure early */
     91 	bi_init(bootinfo);
     92 
     93 	switch (argc) {
     94 #ifdef INDIGO_R3K_MODE
     95 	case 1:
     96 		again();
     97 		break;
     98 #endif
     99 	case 2:
    100 		/* To specify HDD on Indigo R3K */
    101 		if (strstr(argv[1], "dksc(")) {
    102 			parse(argv, kernelname);
    103 		} else {
    104 			again();
    105 		}
    106 		break;
    107 	default:
    108 		/* To specify HDD on Indigo R4K and Indy */
    109 		if (strstr(argv[1], "dksc(")) {
    110 			parse(argv, kernelname);
    111 		} else {
    112 			again();
    113 		}
    114 		break;
    115 	}
    116 
    117 	find_devs();
    118 
    119 	win = loadfile(kernelname, marks, LOAD_KERNEL);
    120 
    121 	if (win < 0) {
    122 		printf("Boot failed!  Halting...\n");
    123 		reboot();
    124 	}
    125 
    126 	strlcpy(bi_bpath.bootpath, kernelname, BTINFO_BOOTPATH_LEN);
    127 	bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath));
    128 
    129 	bi_syms.nsym = marks[MARK_NSYM];
    130 	bi_syms.ssym = marks[MARK_SYM];
    131 	bi_syms.esym = marks[MARK_END];
    132 	bi_add(&bi_syms, BTINFO_SYMTAB, sizeof(bi_syms));
    133 	entry = (void *)marks[MARK_ENTRY];
    134 
    135 	(*entry)(argc, argv, BOOTINFO_MAGIC, bootinfo);
    136 
    137 	printf("Kernel returned!  Halting...\n");
    138 	return 0;
    139 }
    140 
    141 void
    142 again(void)
    143 {
    144 	printf("Invalid argument\n");
    145 	printf("i.e., dksc(0,X,8)loader dksc(0,X,0)/kernel\n");
    146 	reboot();
    147 }
    148 
    149 void
    150 reboot(void)
    151 {
    152 #ifdef INDIGO_R3K_MODE
    153 	romrestart();
    154 #else
    155 	arcbios_Reboot();
    156 #endif
    157 }
    158