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
main(int argc,char ** argv)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
again(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
reboot(void)150 reboot(void)
151 {
152 #ifdef INDIGO_R3K_MODE
153 romrestart();
154 #else
155 arcbios_Reboot();
156 #endif
157 }
158