main.c revision 83364 
1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * Copyright (c) 1998,2000 Doug Rabson <dfr@freebsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#ifndef lint
29static const char rcsid[] =
30  "$FreeBSD: head/sys/boot/ia64/ski/main.c 83364 2001-09-12 08:34:27Z dfr $";
31#endif /* not lint */
32
33#include <stand.h>
34#include <string.h>
35#include <setjmp.h>
36#include <machine/fpu.h>
37
38#include "bootstrap.h"
39#include "libski.h"
40
41extern char bootprog_name[];
42extern char bootprog_rev[];
43extern char bootprog_date[];
44extern char bootprog_maker[];
45
46struct ski_devdesc	currdev;	/* our current device */
47struct arch_switch	archsw;		/* MI/MD interface boundary */
48
49void
50__start(void)
51{
52	static char stack[16384] __attribute__((aligned (16)));
53	static char malloc[512*1024];
54	int i;
55
56	__asm __volatile("movl gp=__gp;;");
57	__asm __volatile("mov sp=%0" :: "r"(&stack[16384]));
58	__asm __volatile("bsw.1;;");
59	__asm __volatile("mov ar.fpsr=%0" :: "r"(IA64_FPSR_DEFAULT));
60
61	/*
62	 * initialise the heap as early as possible.  Once this is done,
63	 * alloc() is usable. The stack is buried inside us, so this is
64	 * safe.
65	 */
66	setheap((void *)malloc, (void *)(malloc + 512*1024));
67
68	/*
69	 * XXX Chicken-and-egg problem; we want to have console output
70	 * early, but some console attributes may depend on reading from
71	 * eg. the boot device, which we can't do yet.  We can use
72	 * printf() etc. once this is done.
73	 */
74	cons_probe();
75
76	/*
77	 * Initialise the block cache
78	 */
79	bcache_init(32, 512);		/* 16k XXX tune this */
80
81	/*
82	 * March through the device switch probing for things.
83	 */
84	for (i = 0; devsw[i] != NULL; i++)
85		if (devsw[i]->dv_init != NULL)
86			(devsw[i]->dv_init)();
87
88	printf("\n");
89	printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
90	printf("(%s, %s)\n", bootprog_maker, bootprog_date);
91#if 0
92	printf("Memory: %ld k\n", memsize() / 1024);
93#endif
94
95	/* XXX presumes that biosdisk is first in devsw */
96	currdev.d_dev = devsw[0];
97	currdev.d_type = currdev.d_dev->dv_type;
98	currdev.d_kind.skidisk.unit = 0;
99	/* XXX should be able to detect this, default to autoprobe */
100	currdev.d_kind.skidisk.slice = -1;
101	/* default to 'a' */
102	currdev.d_kind.skidisk.partition = 0;
103
104#if 0
105	/* Create arc-specific variables */
106	bootfile = GetEnvironmentVariable(ARCENV_BOOTFILE);
107	if (bootfile)
108		setenv("bootfile", bootfile, 1);
109#endif
110
111	env_setenv("currdev", EV_VOLATILE, ski_fmtdev(&currdev),
112	    ski_setcurrdev, env_nounset);
113	env_setenv("loaddev", EV_VOLATILE, ski_fmtdev(&currdev), env_noset,
114	    env_nounset);
115
116	setenv("LINES", "24", 1);	/* optional */
117
118	archsw.arch_autoload = ski_autoload;
119	archsw.arch_getdev = ski_getdev;
120	archsw.arch_copyin = ski_copyin;
121	archsw.arch_copyout = ski_copyout;
122	archsw.arch_readin = ski_readin;
123
124	interact();			/* doesn't return */
125
126	exit(0);
127}
128
129COMMAND_SET(quit, "quit", "exit the loader", command_quit);
130
131static int
132command_quit(int argc, char *argv[])
133{
134	exit(0);
135	return (CMD_OK);
136}
137