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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* Copyright (C) Paul Mackerras 1997.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include "nonstdio.h"
#include "zlib.h"
#include <asm/bootinfo.h>
#include <asm/processor.h>
#include <asm/page.h>
extern void *finddevice(const char *);
extern int getprop(void *, const char *, void *, int);
extern char *claim(unsigned, unsigned, unsigned);
void make_bi_recs(unsigned long);
void gunzip(void *, int, unsigned char *, int *);
#define get_16be(x) (*(unsigned short *)(x))
#define get_32be(x) (*(unsigned *)(x))
#define RAM_START 0xc0000000
#define PROG_START RAM_START
#define RAM_END (RAM_START + 0x800000) /* only 8M mapped with BATs */
char *avail_ram;
char *end_avail;
extern char _start[], _end[];
extern char image_data[];
extern int image_len;
extern char initrd_data[];
extern int initrd_len;
boot(int a1, int a2, void *prom)
{
int ns, oh, i;
unsigned sa, len;
void *dst;
unsigned char *im;
unsigned initrd_start, initrd_size;
printf("coffboot starting: loaded at 0x%x\n", _start);
setup_bats(RAM_START);
if (initrd_len) {
initrd_size = initrd_len;
initrd_start = (RAM_END - initrd_size) & ~0xFFF;
a1 = initrd_start;
a2 = initrd_size;
claim(initrd_start - RAM_START, RAM_END - initrd_start, 0);
printf("initial ramdisk moving 0x%x <- 0x%x (%x bytes)\n",
initrd_start, initrd_data, initrd_size);
memcpy((char *)initrd_start, initrd_data, initrd_size);
}
im = image_data;
len = image_len;
/* claim 3MB starting at 0 */
claim(0, 3 << 20, 0);
dst = (void *) RAM_START;
if (im[0] == 0x1f && im[1] == 0x8b) {
/* claim 512kB for scratch space */
avail_ram = claim(0, 512 << 10, 0x10) + RAM_START;
end_avail = avail_ram + (512 << 10);
printf("avail_ram = %x\n", avail_ram);
printf("gunzipping (0x%x <- 0x%x:0x%0x)...", dst, im, im+len);
gunzip(dst, 3 << 20, im, &len);
printf("done %u bytes\n", len);
} else {
memmove(dst, im, len);
}
flush_cache(dst, len);
make_bi_recs((unsigned long)dst + len);
sa = (unsigned long)PROG_START;
printf("start address = 0x%x\n", sa);
#if 0
pause();
#endif
(*(void (*)())sa)(a1, a2, prom);
printf("returned?\n");
pause();
}
void make_bi_recs(unsigned long addr)
{
struct bi_record *rec;
rec = (struct bi_record *)PAGE_ALIGN(addr);
rec->tag = BI_FIRST;
rec->size = sizeof(struct bi_record);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
rec->tag = BI_BOOTLOADER_ID;
sprintf( (char *)rec->data, "coffboot");
rec->size = sizeof(struct bi_record) + strlen("coffboot") + 1;
rec = (struct bi_record *)((unsigned long)rec + rec->size);
rec->tag = BI_MACHTYPE;
rec->data[0] = _MACH_Pmac;
rec->data[1] = 1;
rec->size = sizeof(struct bi_record) + sizeof(unsigned long);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
rec->tag = BI_LAST;
rec->size = sizeof(struct bi_record);
rec = (struct bi_record *)((unsigned long)rec + rec->size);
}
void *zalloc(void *x, unsigned items, unsigned size)
{
void *p = avail_ram;
size *= items;
size = (size + 7) & -8;
avail_ram += size;
if (avail_ram > end_avail) {
printf("oops... out of memory\n");
pause();
}
return p;
}
void zfree(void *x, void *addr, unsigned nb)
{
}
#define HEAD_CRC 2
#define EXTRA_FIELD 4
#define ORIG_NAME 8
#define COMMENT 0x10
#define RESERVED 0xe0
#define DEFLATED 8
void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
{
z_stream s;
int r, i, flags;
/* skip header */
i = 10;
flags = src[3];
if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
printf("bad gzipped data\n");
exit();
}
if ((flags & EXTRA_FIELD) != 0)
i = 12 + src[10] + (src[11] << 8);
if ((flags & ORIG_NAME) != 0)
while (src[i++] != 0)
;
if ((flags & COMMENT) != 0)
while (src[i++] != 0)
;
if ((flags & HEAD_CRC) != 0)
i += 2;
if (i >= *lenp) {
printf("gunzip: ran out of data in header\n");
exit();
}
s.zalloc = zalloc;
s.zfree = zfree;
r = inflateInit2(&s, -MAX_WBITS);
if (r != Z_OK) {
printf("inflateInit2 returned %d\n", r);
exit();
}
s.next_in = src + i;
s.avail_in = *lenp - i;
s.next_out = dst;
s.avail_out = dstlen;
r = inflate(&s, Z_FINISH);
if (r != Z_OK && r != Z_STREAM_END) {
printf("inflate returned %d msg: %s\n", r, s.msg);
exit();
}
*lenp = s.next_out - (unsigned char *) dst;
inflateEnd(&s);
}
|
