1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* Copyright (c) 1998,2000 Doug Rabson <dfr@freebsd.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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.
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <stand.h>
#include <string.h>
#include <setjmp.h>
#include <machine/fpu.h>
#include "bootstrap.h"
#include "libski.h"
extern char bootprog_name[];
extern char bootprog_rev[];
extern char bootprog_date[];
extern char bootprog_maker[];
struct ski_devdesc currdev; /* our current device */
struct arch_switch archsw; /* MI/MD interface boundary */
void
__start(void)
{
static char stack[16384] __attribute__((aligned (16)));
static char malloc[512*1024];
int i;
__asm __volatile("movl gp=__gp;;");
__asm __volatile("mov sp=%0" :: "r"(&stack[16384]));
__asm __volatile("bsw.1;;");
__asm __volatile("mov ar.fpsr=%0" :: "r"(IA64_FPSR_DEFAULT));
/*
* initialise the heap as early as possible. Once this is done,
* alloc() is usable. The stack is buried inside us, so this is
* safe.
*/
setheap((void *)malloc, (void *)(malloc + 512*1024));
/*
* XXX Chicken-and-egg problem; we want to have console output
* early, but some console attributes may depend on reading from
* eg. the boot device, which we can't do yet. We can use
* printf() etc. once this is done.
*/
cons_probe();
/*
* Initialise the block cache
*/
bcache_init(32, 512); /* 16k XXX tune this */
/*
* March through the device switch probing for things.
*/
for (i = 0; devsw[i] != NULL; i++)
if (devsw[i]->dv_init != NULL)
(devsw[i]->dv_init)();
printf("\n");
printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
printf("(%s, %s)\n", bootprog_maker, bootprog_date);
#if 0
printf("Memory: %ld k\n", memsize() / 1024);
#endif
/* XXX presumes that biosdisk is first in devsw */
currdev.d_dev = devsw[0];
currdev.d_type = currdev.d_dev->dv_type;
currdev.d_kind.skidisk.unit = 0;
/* XXX should be able to detect this, default to autoprobe */
currdev.d_kind.skidisk.slice = -1;
/* default to 'a' */
currdev.d_kind.skidisk.partition = 0;
#if 0
/* Create arc-specific variables */
bootfile = GetEnvironmentVariable(ARCENV_BOOTFILE);
if (bootfile)
setenv("bootfile", bootfile, 1);
#endif
env_setenv("currdev", EV_VOLATILE, ski_fmtdev(&currdev),
ski_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, ski_fmtdev(&currdev), env_noset,
env_nounset);
setenv("LINES", "24", 1); /* optional */
archsw.arch_autoload = ski_autoload;
archsw.arch_getdev = ski_getdev;
archsw.arch_copyin = ski_copyin;
archsw.arch_copyout = ski_copyout;
archsw.arch_readin = ski_readin;
interact(); /* doesn't return */
exit(0);
}
COMMAND_SET(quit, "quit", "exit the loader", command_quit);
static int
command_quit(int argc, char *argv[])
{
exit(0);
return (CMD_OK);
}
|
